BACKGROUND Pulmonary tuberculosis(PTB)is prevalent in immunocompromised populations,including patients with hematologic malignancies,human immunodeficiency virus infections,and chronic diseases.Effective treatment for...BACKGROUND Pulmonary tuberculosis(PTB)is prevalent in immunocompromised populations,including patients with hematologic malignancies,human immunodeficiency virus infections,and chronic diseases.Effective treatment for acute promyelocytic leukemia(APL)combined with PTB is lacking.These patients show an extremely poor prognosis.Therefore,studies should establish efficient treatment options to improve patient survival and prognosis.CASE SUMMARY A 60-year-old male with pain in the right side of his chest and a fever for 4 d visited the outpatient department of our hospital.Peripheral blood smear revealed 54%blasts.Following bone marrow examinations,variant APL with TNRC18-RARA fusion gene was diagnosed.Chest computed tomography scan showed bilateral pneumonitis with bilateral pleural effusions,partial atelectasis in the lower lobes of both lungs,and the bronchoalveolar lavage fluid gene X-Pert test was positive,indicative of PTB.Carrimycin,ethambutol(EMB),and isoniazid(INH)were administered since he could not receive chemotherapy as the WBC count decreased continuously.After one week of treatment with carrimycin,the patient recovered from fever and received chemotherapy.Chemotherapy was very effective and his white blood cells counts got back to normal.After being given five months with rifampin,EMB and INH and chemotherapy,the patient showed complete remission from pneumonia and APL.CONCLUSION We report a case of PTB treated successfully with carrimycin with APL that requires chemotherapy.展开更多
Clinically,arsenic trioxide(ATO)was applied to the treatment of acute promyelocytic leukemia(APL)as a reliable and effective frontline drug.However,the administration regimen of AsⅢwas limited due to its fast clearan...Clinically,arsenic trioxide(ATO)was applied to the treatment of acute promyelocytic leukemia(APL)as a reliable and effective frontline drug.However,the administration regimen of AsⅢwas limited due to its fast clearance,short therapeutic window and toxicity as well.Based on CD71 overexpressed on APL cells,in present study,a transferrin(Tf)-modified liposome(LP)was established firstly to encapsulate AsⅢin arsenic-nickel complex by nickel acetate gradient method.The AsⅢ-loaded liposomes(AsLP)exhibited the feature of acid-sensitive release in vitro.Tf-modified AsLP(Tf-AsLP)were specifically taken up by APL cells and the acidic intracellular environment triggered liposome to release AsⅢwhich stimulated reactive oxygen species level and caspase-3 activity.Tf-AsLP prolonged half-life of AsⅢin blood circulation,lowered systemic toxicity,and promoted apoptosis and induced cell differentiation at lesion site in vivo.Considering that ATO combined with RA is usually applied as the first choice in clinic for APL treatment to improve the therapeutic effect,accordingly,a Tf-modified RA liposome(Tf-RALP)was designed to reduce the severe side effects of free RA and assist Tf-AsLP for better efficacy.As expected,the tumor inhibition rate of Tf-AsLP was improved significantly with the combination of Tf-RALP on subcutaneous tumor model.Furthermore,APL orthotopic NOD/SCID mice model was established by 60CO irradiation and HL-60 cells intravenously injection.The effect of co-administration(Tf-AsLP+Tf-RALP)was also confirmed to conspicuous decrease the number of leukemia cells in the circulatory system and prolong the survival time of APL mice by promoting the APL cells’apoptosis and differentiation in peripheral blood and bone marrow.Collectively,Tf-modified acid-sensitive AsLP could greatly reduce the systemic toxicity of free drug.Moreover,Tf-AsLP combined with Tf-RALP could achieve better efficacy.Thus,transferrinmodified AsⅢliposome would be a novel clinical strategy to improve patient compliance,with promising translation prospects.展开更多
Introduction: Acute Promyelocytic Leukemia (APL) is highly associated with hemostasis alterations. The atypical hemolytic uremic syndrome (aHUS) is a rare type of Thrombotic Microangiopathy (TMA) due to an overactivat...Introduction: Acute Promyelocytic Leukemia (APL) is highly associated with hemostasis alterations. The atypical hemolytic uremic syndrome (aHUS) is a rare type of Thrombotic Microangiopathy (TMA) due to an overactivation of the alternative complement pathway. Case Presentation: A 48-years-old woman was diagnosed with APL and achieved molecular remission after induction therapy. During the second consolidation cycle she presented with TMA. She began treatment with plasma exchange plus corticotherapy but due to aggravation of symptoms Eculizumab was initiated. Thrombotic thrombocytopenic purpura, infections and drug toxicity causes were ruled out. There was no evidence of relapse of the APL. Genetic studies of the hereditary anomalies of the alternative complement pathway were negative and the decision of stopping Eculizumab was made. During maintenance therapy for the APL she presented a severe relapse of the aHUS, requiring dialysis. She re-started treatment with Eculizumab with a progressive hematologic recovery and improvement of renal function. She completed APL treatment without relapse of the leukemia for the moment and continues to be treated with Eculizumab. Conclusion: This is the first published case of coexisting aHUS and APL successfully treated with Eculizumab.展开更多
BACKGROUND Arsenic trioxide(ATO)is recommended for patients who do not achieve molecular remission or who have molecular or morphologic relapse.However,there are no guidelines for adjusting ATO dosage in patients with...BACKGROUND Arsenic trioxide(ATO)is recommended for patients who do not achieve molecular remission or who have molecular or morphologic relapse.However,there are no guidelines for adjusting ATO dosage in patients with severe renal failure or on dialysis.Herein,we report the successful treatment of relapsed acute promyelocytic leukemia(APL)in a patient on hemodialysis with ATO single agent and review the cases in literature.CASE SUMMARY A 46-year-old woman who has been on hemodialysis to chronic glomerulonephritis for 15 years visited our hospital for pancytopenia.She had been seen for pancytopenia 3 years ago and had been diagnosed with APL.She also received chemotherapy for APL but unfortunately was lost to follow-up after her second consolidation chemotherapy.She was noted to have pancytopenia by her nephrologist during hemodialysis 1 mo ago.Bone marrow biopsy and reverse transcriptase-polymerase chain reaction(RT-PCR)tests revealed a diagnosis of relapsed APL.Treatment for relapsed APL with ATO single agent was started and she achieved molecular remission after administering 24 doses of ATO.Thus far,four consolidation therapies have been performed with the ATO single agent,and,to date,the molecular remission has been maintained as negative promyelocytic leukemia/retinoic acid receptor-αfusion gene as confirmed by RTPCR testing for two years.CONCLUSION This is a rare case of relapsed APL successfully treated with the single agent ATO in a patient on hemodialysis.展开更多
BACKGROUND Chromosome i(17)(q10)abnormality is mainly associated with chronic myeloid leukemia(CML),myelodysplastic syndrome/myeloproliferative tumors(MDS/MPD),and acute myeloid leukemia(AML).The role of i(17)(q10)in ...BACKGROUND Chromosome i(17)(q10)abnormality is mainly associated with chronic myeloid leukemia(CML),myelodysplastic syndrome/myeloproliferative tumors(MDS/MPD),and acute myeloid leukemia(AML).The role of i(17)(q10)in AML is still unknown,the differences between AML and acute promyelocytic leukemia(APL)-like AML with i(17)(q10)need more research.This study aimed to investigate the clinical characteristics and laboratory evidence of 2 AML cases with i(17)(q10),similar to APL phenotype.CASE SUMMARY Both pediatric patients were males;case 1 had newly diagnosed AML,and case 2 showed relapsed tumor after 1 year of drug withdrawal.Bone marrow cell morphology,chromosome karyotype analysis,Fully-instrumented submersible housing test,immunological assays,molecular biological methods,and blood tumor panoramic gene test were performed.All-trans retinoic acid(ATRA)combined with arsenic acid(As2O3)were used in the first course of treatment.Bone marrow was dominated by abnormal promyelocytic granulocytes.Karyotype test revealed i(17)(q10)isochromosome.Immunological phenotype mainly included positive expressions of CD9,CD13,CD33,and CD38.Case 1 suffered intracranial hemorrhage after re-chemotherapy and died on D162.For case 2,on D145 and D265,bone marrow promyelocytic granulocytes accounted for 2%.Flow cytometric residual lesion detection showed no abnormal immunophenotype cells.The copy number of WT1 gene in two cases were 1087 and 1010,respectively,and the expression rates were 55.29% and 59.5%,respectively.CONCLUSION ATRA,As2O3,and chemotherapy may be ineffective in treating APL-like AML with i(17)(q10)but without t(15;17)and PML-RARA fusion gene.展开更多
All-trans retinoic acid(ATRA)and pre-upfront arsenic trioxide(ATO)have revolutionized the therapy of acute promyelocytic leukemia(APL).However,internal tandem duplication of FMS-like tyrosine kinase 3(FLT3-ITD)mutatio...All-trans retinoic acid(ATRA)and pre-upfront arsenic trioxide(ATO)have revolutionized the therapy of acute promyelocytic leukemia(APL).However,internal tandem duplication of FMS-like tyrosine kinase 3(FLT3-ITD)mutations is associated with increased risk of relapse.The aim of this study was to analyze the prognostic impact of FLT3-ITD on APL patients who received remission induction with ATRA,idarubicin(IDA)and/or ATO,followed by ATRA plus ATO along with anthracycline,as consolidation therapy.A total of 72 patients newly diagnosed with APL were included in this study.83.3%of the patients achieved complete remission(CR)after induction therapy.FLT3-ITD mutations were detected in 16(22.2%)patients and closely related to bcr-3 PML-RARa transcript(P<0.001).The 5-year overall survival(OS)rate was 100%in both FLT3-ITDposltlve and FLT3-ITD^(negatlve)groups,and there was no significant difference in 5-year event-free survival(EFS)between the two groups(78.3%vs.83.3%,P=0.85).ATRA plus ATO and anthracycline-based chemotherapy achieved great outcome in newly diagnosed APL regardless of the FLT3-ITD mutation status.展开更多
BACKGROUND Myeloid sarcoma(MS)rarely occurs in acute promyelocytic leukemia(APL)at onset,but it can develop in relapse cases,especially after APL treated with alltrans retinoic acid(ATRA).Therefore little is known abo...BACKGROUND Myeloid sarcoma(MS)rarely occurs in acute promyelocytic leukemia(APL)at onset,but it can develop in relapse cases,especially after APL treated with alltrans retinoic acid(ATRA).Therefore little is known about the clinical features and suitable treatment for APL related MS due to the rarity of the disease,although this may be different from the treatment and prognosis of MS in the relapse stage.To our best knowledge,this is the second case report of APL initial presentation as colon MS.CASE SUMMARY A 77-year-old woman complained of intermittent right lower abdominal pain,black stool,and difficult defecation for 2 mo.Physical examination showed diffuse tenderness during deep palpation and an anemic appearance.Laboratory findings showed positivity for fecal occult blood testing;white blood cell count:3.84×109/L;hemoglobin:105 g/L;platelet count:174×109/L;and negativity for tumor markers.Abdominal enhanced computed tomography showed a space occupying lesion in the colon(1.9 cm).Fibrocolonoscopy revealed a polypoid and ulcerated mass measuring 2.5 cm.The tumor was removed.To our surprise,MS was confirmed by immunohistochemistry.PML/RARαfusion gene was detected in colon specimens by fluorescent in situ hybridization and real-time reverse transcription polymerase chain reaction,which was consistent with the bone marrow.She was diagnosed as having APL related MS.A smooth and unobstructed intestinal wall was found by fibrocolonoscopy,and continuous molecular remission was confirmed in both the bone marrow and colon after four courses of ATRA+arsenic trioxide(ATO).ATRA+ATO showed a favorable therapeutic response for both APL and MS.CONCLUSION Early use of ATRA can benefit APL patients,regardless of whether MS is the first or recurrent manifestation.展开更多
ABSRTACT Objective: To detect the modulation of cytokines production by acute promyelocytic leukemia (APL) cells before or after exposure to all-trans retinoic acid (ATRA). Methods: Diagnoses were performed according...ABSRTACT Objective: To detect the modulation of cytokines production by acute promyelocytic leukemia (APL) cells before or after exposure to all-trans retinoic acid (ATRA). Methods: Diagnoses were performed according to the FAB cytological classification criteria and cytogenetic criteria. Bone marrow or blood samples from APL patients were collected in heparinized microfuge tube. Primary APL cells were separated and purified by traditional Ficoll-Hypaque density centrifugation and enriched after adherence to plastic surfaces. IL-1b, IL-6, IL-8, TNFa and G-CSF levels in the supernatants of cultured leukemia cells were estimated by ELISA method. NBT method was used to detect the differentiation of APL cells at the same time. Results: 96 h after exposure to ATRA at 10-6 M in vitro or 60 mg/day in vivo, APL cells showed a significant increase of IL-1b (P<0.05) and G-CSF (P<0.05) production, and a significant decrease of IL-6 (P<0.05) and IL-8 (P<0.05), however, there was no obvious variation of TNFa. On the other hand, the proliferation of APL cells in vitro was statistically correlated to the IL-1b secretion or G-CSF secretion. And the cell number ratio in patients with detectable IL-1b or G-CSF was higher than that without detectable IL-1b or G-CSF. Conclusion: IL-1b and G-CSF secretion may play an important role in the proliferation of APL cells after exposure to ATRA.展开更多
BACKGROUND Previous cases that have been stated in this article have displayed that around 1%to 7%of patients that have been treated with chemotherapy for acute promyelocytic leukemia developed myelodysplastic syndrom...BACKGROUND Previous cases that have been stated in this article have displayed that around 1%to 7%of patients that have been treated with chemotherapy for acute promyelocytic leukemia developed myelodysplastic syndrome or acute myeloid leukemia.One can see that’s why this case presentation of a 60-year-old man that had a good response to acute promyelocytic leukemia treatment,that later presented with a central nervous system recurrence of acute promyelocytic leukemia and acquired sideroblastic anemia(a form of myelodysplasia)from treatment is a unique case report.CASE SUMMARY The presence of central nervous system relapse in acute promyelocytic leukemia patients is very unlikely compared to recurring mainly in the bone marrow.It is also uncommon to be diagnosed with sideroblastic anemia(form of myelodysplastic syndrome)as a result from treatment for acute promyelocytic leukemia.This case report highlights the detection,treatment/maintenance with idarubicin,all-trans-retinoic-acid,arsenic trioxide,methotrexate,6-mercaptopurine,and ommaya reservoir intrathecal methotrexate administration in a patient that had central nervous system relapse of acute promyelocytic leukemia and acquired sideroblastic anemia.CONCLUSION In essence,first time relapse concerning the central nervous system in treated acute promyelocytic leukemia patients who had a good response to therapy is very uncommon.The acquirement of a myelodysplastic syndrome such as ringed sideroblastic anemia is also rare regarding this patient population.Although such cases are infrequent,this case report represents a unique insight of the detection,treatment,and maintenance of a 60-year-old man diagnosed with acute promyelocytic leukemia,resulting in the acquirement of sideroblastic anemia and central nervous system relapse.展开更多
Therapy-related acute myeloid leukemia(t-AML) refers to a heterogeneous group of myeloid neoplasms that develop in patients following extensive exposure to either cytotoxic agents or radiation.The development of t-AML...Therapy-related acute myeloid leukemia(t-AML) refers to a heterogeneous group of myeloid neoplasms that develop in patients following extensive exposure to either cytotoxic agents or radiation.The development of t-AML has been reported following treatment of cancers ranging from hematological malignancies to solid tumors; however, to our knowledge, t-AML has never been reported following treatment of gastric cancer.In this study, we report the development of t-acute promyelocytic leukemia in a cT 4N1M0 gastric cancer patient after an approximate 44 mo latency period following treatment with 4 cycles of oxaliplatin(OXP)(85 mg/m2 on day 1) plus capecitabine(1250 mg/m2 orally twice daily on days 1-14) in combination with recombinant human granulocyte-colony stimulating factor treatment.Karyotype analysis of the patient revealed 46,XY,t(15;17)(q22;q21)[15]/46,idem,-9,+add(9)(p22)[2]/46,XY[3], which, according to previous studies, includes some "favorable" genetic abnormalities.The patient was then treated with all-trans retinoic acid(ATRA, 25 mg/m2/d) plus arsenic trioxide(ATO, 10 mg/d) and attained complete remission.Our case illuminated the role of certain cytotoxic agents in the induction of t-AML following gastric cancer treatment.We recommend instituting a mandatory additional evaluation for patients undergoing these therapies in the future.展开更多
The differentiation syndrome is an inflammatory reaction with increased capillary permeability that occurs in up to 25% of patients with acute promyelocytic leukemia treated with all-trans retinoic acid. A 50-year-old...The differentiation syndrome is an inflammatory reaction with increased capillary permeability that occurs in up to 25% of patients with acute promyelocytic leukemia treated with all-trans retinoic acid. A 50-year-old man with acute promyelocytic leukemia underwent chemotherapy with idarubicin and all-trans retinoic acid. On day +21 the patient developed pruritic prepatelar papules as well as several 10 mm subcutaneous nodules in both thighs accompanied by persistent fever. On the day +25 the patient presented with bilateral pulmonary crackles, infiltrates in the right lower lobe and severe hypotension which required dopamine infusion. Biopsy of one of the thighs nodules was performed. A Sweet syndrome associated to a differentiation syndrome was suspected. All-trans retinoic acid therapy was discontinued and dexamethasone was administered. In 48 h the patient showed remission of the fever and the infiltrates and the skin lesions acquired a residual aspect. It is debatable whether these two syndromes are distinct entities with common mechanisms or whether they are poles of the same spectrum. Dermatologists and hematologists must be aware of these two syndromes and its pathophysiologic association.展开更多
Objective:To investigate the clinical effect of hydrogen sulfide on acute promyelocytic leukemia (acute promyelocytic leukemia APL) complicated with infection.Methods: A total of 30 cases patients of APL complicated w...Objective:To investigate the clinical effect of hydrogen sulfide on acute promyelocytic leukemia (acute promyelocytic leukemia APL) complicated with infection.Methods: A total of 30 cases patients of APL complicated with infection were selected as experimental group, 26 cases patients with only APL as control group. Detect the H2S, C-reactive protein (CRP), tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β) and interleukin-10 (IL-10) level in the blood of the experimental group and control group, comparing the above indicators have no significant difference between the two groups.Results: Experimental group of blood H2S, CRP, TNF-α and IL-1β levels were significantly increased, IL-10 decreased, which was statistically significant compared with the control group;the H2S, CRP, TNF-αand IL-1βlevels of the experimental group after the treatment were significantly decreased, IL-10 level increased, There was statistical significance compared with the experimental group before the treatment;compared with the control group, the difference was not statistically significant. The experimental group H2S was positively correlated with CRP, TNF-α and IL-1β, H2S was negatively correlated with IL-10.Conclusions: Endogenous H2S is involved in the pathophysiological process of inflammation in APL with infection, and its role may be similar to that of CRP, TNF-α and IL-1β, which is contrary to the effect of IL-10.展开更多
Neurological manifestations are rare as initial presentation in acute promyelocytic leukemia (APL). This case illustrates status epilepticus as initial presentation in this disease. Atypical cells on peripheral smear ...Neurological manifestations are rare as initial presentation in acute promyelocytic leukemia (APL). This case illustrates status epilepticus as initial presentation in this disease. Atypical cells on peripheral smear led to the diagnosis of leukemia.展开更多
Clinical observations were retrospectively compared between 2 matched groups of patients with acute promyelocytic leukemia (APL) each 20. The first group were treated with chemotherapy, the other with all-tram retinoi...Clinical observations were retrospectively compared between 2 matched groups of patients with acute promyelocytic leukemia (APL) each 20. The first group were treated with chemotherapy, the other with all-tram retinoic acid (ATRA) alone at a dose of 45-60mg/M^2/d. The complete remission (CR) rate of ATRA group was significantly higher than that of chemotherapy (90% vs 55%). The time for obtaining CR as well as the duration of fever and hospitalization were shorter and the amount of blood transfused was less in the former than in the latter group. Seven cases were complicated by DIC and 4 died in the group of chemotherapy, while no case was by of DIC or death in the ATRA group. The mechanism was discussed. ATRA is an alternative effective drug for remission induction therapy in APL with high rate of CR.展开更多
Acute promyelocytic leukemia (APL) represents the first example o f a human cancer successfully treated with a differentiation reducer, all-trans retinoic acid. APL is also characterized by a specific chromosome trans...Acute promyelocytic leukemia (APL) represents the first example o f a human cancer successfully treated with a differentiation reducer, all-trans retinoic acid. APL is also characterized by a specific chromosome translocution t (15; 17). In this work, using techniques of molecular biology, we demonstrated that the gene coding for the retinoic acid receptor alpha (RARA), normally located on chromosome 17, was disrupted by the t (15; 17) and fused with the PML gene on chromosome 15. The chromosome 17 breaks were mapped consistently within the second intron of the RARA gene while the chromosome 15 breaks were clustered in two limited regions within the PML gene. Molecular cloning and sequence analysis of part of the PML gene allowed to establish a specific "nested" reverse transcription/polymerase chain reaction (PCR) procedure to characterize the expression patterns of the PML-RARA fusion gene. Different iso forms of the fusion transcripts were discovered which were produced as a result of distinct PML gene rearrangements. The biological activity of the PML-RARA fusion gene and its iso forms should be further explored.展开更多
BACKGROUND Therapy-related acute promyelocytic leukemia(t-APL)is a rare complication observed in solitary bone plasmacytoma(SBP),and SBP after radiotherapy evolving to APL harboring the FMS-like tyrosine kinase 3-inte...BACKGROUND Therapy-related acute promyelocytic leukemia(t-APL)is a rare complication observed in solitary bone plasmacytoma(SBP),and SBP after radiotherapy evolving to APL harboring the FMS-like tyrosine kinase 3-internal tandem duplication(FLT3-ITD)mutation has never been reported.Here,we present the first case reported until now.CASE SUMMARY We describe a 64-year-old woman who presented with lumbar pain and was initially diagnosed with SBP.However,after one year of radiotherapy treatment,this patient experienced a long-standing bone-marrow-suppressive period and finally developed APL harboring the FLT3-ITD mutation,as confirmed by analyses of clinical features,bone marrow morphology,flow cytometry,cytogenetic examination,and molecular biology.On admission,the patient had disseminated intravascular coagulation and intracranial hemorrhage,and the peripheral blood and bone marrow smear displayed abundant abnormal promyelocytes.Unfortunately,she died when the definite diagnosis was made.CONCLUSION The patient with t-APL harboring FLT3-ITD mutation evolving from SBP after radiotherapy had not been reported and had poor clinical outcomes.FLT3-ITD mutation in t-APL may be a potential pathogenesis of leukemogenesis.We should consider the potential risk of secondary neoplasms in SBP patients after radiotherapy.展开更多
Objective:To study the effect of arsenic trioxide (As2O3) combined with phorbol ester (PMA) on the proliferation of acute promyelocytic leukemia cell line Kasumi-1.Methods:Acute promyelocytic leukemia cell lines Kasum...Objective:To study the effect of arsenic trioxide (As2O3) combined with phorbol ester (PMA) on the proliferation of acute promyelocytic leukemia cell line Kasumi-1.Methods:Acute promyelocytic leukemia cell lines Kasumi-1 were cultured and randomly divided into control group (treated with the RPMI1640 medium without drugs or serum), As2O3 group (treated with serum-free RPMI1640 medium containing 20 μmol/L As2O3), PMA group (treated with serum-free RPMI1640 medium containing 160 nmol/L PMA) and As2O3+ PMA group (treated with serum-free RPMI1640 medium containing 20 μmol/L As2O3 and 160 nmol/L PMA). After treatment, the cell proliferation activity, cell cycle ratio and the protein expression of related genes were measured.Results: 12 h, 24 h and 48 h after treatment, the cell proliferation activity of As2O3 group, PMA group and As2O3+PMA group were significantly lower than that of control group, and the cell proliferation activity of As2O3+PMA group was significantly lower than that of As2O3 group and PMA group;48 h after treatment, the G1 phase and S phase ratio as well as CDK1 and CyclinB1 expression of As2O3 group, PMA group and As2O3+PMA group were significantly lower than those of control group while the G2 phase ratio as well as Bax, Caspase-3, Caspase-9, p-Chk1 and p-Cdc25C9 expression were significantly higher than those of control group;the G1 phase and S phase ratio as well as CDK1 and CyclinB1 expression of As2O3+PMA group were significantly lower than those of As2O3 group and PMA group while the G2 phase ratio as well as Bax, Caspase-3, Caspase-9, p-Chk1 and p-Cdc25C9 expression was significantly higher than those of As2O3 group and PMA group.Conclusion:As2O3 combined with PMA can inhibit the proliferation of acute promyelocytic leukemia cell line Kasumi-1 by inducing apoptosis and blocking cell cycle.展开更多
Objective:To investigate the changes and significances of plasma hydrogen sulfide (H2S) and nitric oxide (NO) concentration in patients with acute promyelocytic leukemia (APL) before and after treatment.Methods:A tota...Objective:To investigate the changes and significances of plasma hydrogen sulfide (H2S) and nitric oxide (NO) concentration in patients with acute promyelocytic leukemia (APL) before and after treatment.Methods:A total of 26 hospitalized patients with APL in initial treatment were randomly selected as the case group and 26 healthy persons were regarded as control group. The concentrations of H2S and NO in plasma of case group and control group were determined, The acute stage and clinical remission of case group were respectively compared with control group which had no statistical difference.Results:The concentrations of H2S and NO in plasma in acute stage patients were significantly increased, which had statistical significance compared with clinical remission stage and control group. The concentrations of H2S and NO in the plasma of patients in clinical remission after treatment were decreased, close to the healthy control group and the difference had no statistical significance. The change trend of H2S concentration was consistent with NO concentration in plasma of case group before and after treatment and there was positive correlation between them.Conclusions:Endogenous H2S and NO may be involved in the pathophysiological process of APL, and the change trend is consistent and there was positive correlation between them.展开更多
Objective: To investigate the correlation between plasma hydrogen sulfide (H2S), homocysteine (Hcy), folic acid and vitamin B12 in patients with acute promyelocytic leukemia (APL) before and after treatment. Methods:A...Objective: To investigate the correlation between plasma hydrogen sulfide (H2S), homocysteine (Hcy), folic acid and vitamin B12 in patients with acute promyelocytic leukemia (APL) before and after treatment. Methods:A total of 26 hospitalized patients with APL were randomly selected as case group and 26 healthy persons as control group. The concentration of H2S, Hcy and folic acid in plasma of case group and control group were measured, respectively. The statistically significant difference was investigated by comparing the acute onset phase and clinical remission of case group with those of healthy control group. Results:The concentration of H2S and Hcy of plasma in patients of case group during acute onset phase significantly increased, and concentration of folic acid significantly decreased, and there were both statistically significant differences as compared with those during clinical remission and those of control group (P<0.01). The concentration of H2S and Hcy of plasma in patients of case group during clinical remission after treatment decreased, and concentration of folic acid increased. The result was close to that of healthy control group, and there was no statistically significant difference (P>0.05). The change in concentration of plasma H2S was positively correlated with that of Hcy and negatively correlated with that of folic acid in patients of case group before and after treatment. Conclusions:The increase of plasma H2S in patients with APL may be related to the changes in concentration of Hcy and folic acid.展开更多
文摘BACKGROUND Pulmonary tuberculosis(PTB)is prevalent in immunocompromised populations,including patients with hematologic malignancies,human immunodeficiency virus infections,and chronic diseases.Effective treatment for acute promyelocytic leukemia(APL)combined with PTB is lacking.These patients show an extremely poor prognosis.Therefore,studies should establish efficient treatment options to improve patient survival and prognosis.CASE SUMMARY A 60-year-old male with pain in the right side of his chest and a fever for 4 d visited the outpatient department of our hospital.Peripheral blood smear revealed 54%blasts.Following bone marrow examinations,variant APL with TNRC18-RARA fusion gene was diagnosed.Chest computed tomography scan showed bilateral pneumonitis with bilateral pleural effusions,partial atelectasis in the lower lobes of both lungs,and the bronchoalveolar lavage fluid gene X-Pert test was positive,indicative of PTB.Carrimycin,ethambutol(EMB),and isoniazid(INH)were administered since he could not receive chemotherapy as the WBC count decreased continuously.After one week of treatment with carrimycin,the patient recovered from fever and received chemotherapy.Chemotherapy was very effective and his white blood cells counts got back to normal.After being given five months with rifampin,EMB and INH and chemotherapy,the patient showed complete remission from pneumonia and APL.CONCLUSION We report a case of PTB treated successfully with carrimycin with APL that requires chemotherapy.
基金supported by the Science and Technology Commission of Shanghai Municipality (20S11902600)the National Natural Science Foundation of China (82172615)the PDH-SPFDU Joint Research Fund (RHJJ2018-05)
文摘Clinically,arsenic trioxide(ATO)was applied to the treatment of acute promyelocytic leukemia(APL)as a reliable and effective frontline drug.However,the administration regimen of AsⅢwas limited due to its fast clearance,short therapeutic window and toxicity as well.Based on CD71 overexpressed on APL cells,in present study,a transferrin(Tf)-modified liposome(LP)was established firstly to encapsulate AsⅢin arsenic-nickel complex by nickel acetate gradient method.The AsⅢ-loaded liposomes(AsLP)exhibited the feature of acid-sensitive release in vitro.Tf-modified AsLP(Tf-AsLP)were specifically taken up by APL cells and the acidic intracellular environment triggered liposome to release AsⅢwhich stimulated reactive oxygen species level and caspase-3 activity.Tf-AsLP prolonged half-life of AsⅢin blood circulation,lowered systemic toxicity,and promoted apoptosis and induced cell differentiation at lesion site in vivo.Considering that ATO combined with RA is usually applied as the first choice in clinic for APL treatment to improve the therapeutic effect,accordingly,a Tf-modified RA liposome(Tf-RALP)was designed to reduce the severe side effects of free RA and assist Tf-AsLP for better efficacy.As expected,the tumor inhibition rate of Tf-AsLP was improved significantly with the combination of Tf-RALP on subcutaneous tumor model.Furthermore,APL orthotopic NOD/SCID mice model was established by 60CO irradiation and HL-60 cells intravenously injection.The effect of co-administration(Tf-AsLP+Tf-RALP)was also confirmed to conspicuous decrease the number of leukemia cells in the circulatory system and prolong the survival time of APL mice by promoting the APL cells’apoptosis and differentiation in peripheral blood and bone marrow.Collectively,Tf-modified acid-sensitive AsLP could greatly reduce the systemic toxicity of free drug.Moreover,Tf-AsLP combined with Tf-RALP could achieve better efficacy.Thus,transferrinmodified AsⅢliposome would be a novel clinical strategy to improve patient compliance,with promising translation prospects.
文摘Introduction: Acute Promyelocytic Leukemia (APL) is highly associated with hemostasis alterations. The atypical hemolytic uremic syndrome (aHUS) is a rare type of Thrombotic Microangiopathy (TMA) due to an overactivation of the alternative complement pathway. Case Presentation: A 48-years-old woman was diagnosed with APL and achieved molecular remission after induction therapy. During the second consolidation cycle she presented with TMA. She began treatment with plasma exchange plus corticotherapy but due to aggravation of symptoms Eculizumab was initiated. Thrombotic thrombocytopenic purpura, infections and drug toxicity causes were ruled out. There was no evidence of relapse of the APL. Genetic studies of the hereditary anomalies of the alternative complement pathway were negative and the decision of stopping Eculizumab was made. During maintenance therapy for the APL she presented a severe relapse of the aHUS, requiring dialysis. She re-started treatment with Eculizumab with a progressive hematologic recovery and improvement of renal function. She completed APL treatment without relapse of the leukemia for the moment and continues to be treated with Eculizumab. Conclusion: This is the first published case of coexisting aHUS and APL successfully treated with Eculizumab.
基金Supported by Research fund from Chosun University,2020.
文摘BACKGROUND Arsenic trioxide(ATO)is recommended for patients who do not achieve molecular remission or who have molecular or morphologic relapse.However,there are no guidelines for adjusting ATO dosage in patients with severe renal failure or on dialysis.Herein,we report the successful treatment of relapsed acute promyelocytic leukemia(APL)in a patient on hemodialysis with ATO single agent and review the cases in literature.CASE SUMMARY A 46-year-old woman who has been on hemodialysis to chronic glomerulonephritis for 15 years visited our hospital for pancytopenia.She had been seen for pancytopenia 3 years ago and had been diagnosed with APL.She also received chemotherapy for APL but unfortunately was lost to follow-up after her second consolidation chemotherapy.She was noted to have pancytopenia by her nephrologist during hemodialysis 1 mo ago.Bone marrow biopsy and reverse transcriptase-polymerase chain reaction(RT-PCR)tests revealed a diagnosis of relapsed APL.Treatment for relapsed APL with ATO single agent was started and she achieved molecular remission after administering 24 doses of ATO.Thus far,four consolidation therapies have been performed with the ATO single agent,and,to date,the molecular remission has been maintained as negative promyelocytic leukemia/retinoic acid receptor-αfusion gene as confirmed by RTPCR testing for two years.CONCLUSION This is a rare case of relapsed APL successfully treated with the single agent ATO in a patient on hemodialysis.
基金Supported by Shaanxi Natural Science Foundation,No.2020SF-004.
文摘BACKGROUND Chromosome i(17)(q10)abnormality is mainly associated with chronic myeloid leukemia(CML),myelodysplastic syndrome/myeloproliferative tumors(MDS/MPD),and acute myeloid leukemia(AML).The role of i(17)(q10)in AML is still unknown,the differences between AML and acute promyelocytic leukemia(APL)-like AML with i(17)(q10)need more research.This study aimed to investigate the clinical characteristics and laboratory evidence of 2 AML cases with i(17)(q10),similar to APL phenotype.CASE SUMMARY Both pediatric patients were males;case 1 had newly diagnosed AML,and case 2 showed relapsed tumor after 1 year of drug withdrawal.Bone marrow cell morphology,chromosome karyotype analysis,Fully-instrumented submersible housing test,immunological assays,molecular biological methods,and blood tumor panoramic gene test were performed.All-trans retinoic acid(ATRA)combined with arsenic acid(As2O3)were used in the first course of treatment.Bone marrow was dominated by abnormal promyelocytic granulocytes.Karyotype test revealed i(17)(q10)isochromosome.Immunological phenotype mainly included positive expressions of CD9,CD13,CD33,and CD38.Case 1 suffered intracranial hemorrhage after re-chemotherapy and died on D162.For case 2,on D145 and D265,bone marrow promyelocytic granulocytes accounted for 2%.Flow cytometric residual lesion detection showed no abnormal immunophenotype cells.The copy number of WT1 gene in two cases were 1087 and 1010,respectively,and the expression rates were 55.29% and 59.5%,respectively.CONCLUSION ATRA,As2O3,and chemotherapy may be ineffective in treating APL-like AML with i(17)(q10)but without t(15;17)and PML-RARA fusion gene.
文摘All-trans retinoic acid(ATRA)and pre-upfront arsenic trioxide(ATO)have revolutionized the therapy of acute promyelocytic leukemia(APL).However,internal tandem duplication of FMS-like tyrosine kinase 3(FLT3-ITD)mutations is associated with increased risk of relapse.The aim of this study was to analyze the prognostic impact of FLT3-ITD on APL patients who received remission induction with ATRA,idarubicin(IDA)and/or ATO,followed by ATRA plus ATO along with anthracycline,as consolidation therapy.A total of 72 patients newly diagnosed with APL were included in this study.83.3%of the patients achieved complete remission(CR)after induction therapy.FLT3-ITD mutations were detected in 16(22.2%)patients and closely related to bcr-3 PML-RARa transcript(P<0.001).The 5-year overall survival(OS)rate was 100%in both FLT3-ITDposltlve and FLT3-ITD^(negatlve)groups,and there was no significant difference in 5-year event-free survival(EFS)between the two groups(78.3%vs.83.3%,P=0.85).ATRA plus ATO and anthracycline-based chemotherapy achieved great outcome in newly diagnosed APL regardless of the FLT3-ITD mutation status.
基金Supported by the National Natural Science Foundation of China(General Program),No.81170519.
文摘BACKGROUND Myeloid sarcoma(MS)rarely occurs in acute promyelocytic leukemia(APL)at onset,but it can develop in relapse cases,especially after APL treated with alltrans retinoic acid(ATRA).Therefore little is known about the clinical features and suitable treatment for APL related MS due to the rarity of the disease,although this may be different from the treatment and prognosis of MS in the relapse stage.To our best knowledge,this is the second case report of APL initial presentation as colon MS.CASE SUMMARY A 77-year-old woman complained of intermittent right lower abdominal pain,black stool,and difficult defecation for 2 mo.Physical examination showed diffuse tenderness during deep palpation and an anemic appearance.Laboratory findings showed positivity for fecal occult blood testing;white blood cell count:3.84×109/L;hemoglobin:105 g/L;platelet count:174×109/L;and negativity for tumor markers.Abdominal enhanced computed tomography showed a space occupying lesion in the colon(1.9 cm).Fibrocolonoscopy revealed a polypoid and ulcerated mass measuring 2.5 cm.The tumor was removed.To our surprise,MS was confirmed by immunohistochemistry.PML/RARαfusion gene was detected in colon specimens by fluorescent in situ hybridization and real-time reverse transcription polymerase chain reaction,which was consistent with the bone marrow.She was diagnosed as having APL related MS.A smooth and unobstructed intestinal wall was found by fibrocolonoscopy,and continuous molecular remission was confirmed in both the bone marrow and colon after four courses of ATRA+arsenic trioxide(ATO).ATRA+ATO showed a favorable therapeutic response for both APL and MS.CONCLUSION Early use of ATRA can benefit APL patients,regardless of whether MS is the first or recurrent manifestation.
基金This work was supported by a grant from the Natural Science Foundation of Shandong Provice (No.Y2000C301)
文摘ABSRTACT Objective: To detect the modulation of cytokines production by acute promyelocytic leukemia (APL) cells before or after exposure to all-trans retinoic acid (ATRA). Methods: Diagnoses were performed according to the FAB cytological classification criteria and cytogenetic criteria. Bone marrow or blood samples from APL patients were collected in heparinized microfuge tube. Primary APL cells were separated and purified by traditional Ficoll-Hypaque density centrifugation and enriched after adherence to plastic surfaces. IL-1b, IL-6, IL-8, TNFa and G-CSF levels in the supernatants of cultured leukemia cells were estimated by ELISA method. NBT method was used to detect the differentiation of APL cells at the same time. Results: 96 h after exposure to ATRA at 10-6 M in vitro or 60 mg/day in vivo, APL cells showed a significant increase of IL-1b (P<0.05) and G-CSF (P<0.05) production, and a significant decrease of IL-6 (P<0.05) and IL-8 (P<0.05), however, there was no obvious variation of TNFa. On the other hand, the proliferation of APL cells in vitro was statistically correlated to the IL-1b secretion or G-CSF secretion. And the cell number ratio in patients with detectable IL-1b or G-CSF was higher than that without detectable IL-1b or G-CSF. Conclusion: IL-1b and G-CSF secretion may play an important role in the proliferation of APL cells after exposure to ATRA.
文摘BACKGROUND Previous cases that have been stated in this article have displayed that around 1%to 7%of patients that have been treated with chemotherapy for acute promyelocytic leukemia developed myelodysplastic syndrome or acute myeloid leukemia.One can see that’s why this case presentation of a 60-year-old man that had a good response to acute promyelocytic leukemia treatment,that later presented with a central nervous system recurrence of acute promyelocytic leukemia and acquired sideroblastic anemia(a form of myelodysplasia)from treatment is a unique case report.CASE SUMMARY The presence of central nervous system relapse in acute promyelocytic leukemia patients is very unlikely compared to recurring mainly in the bone marrow.It is also uncommon to be diagnosed with sideroblastic anemia(form of myelodysplastic syndrome)as a result from treatment for acute promyelocytic leukemia.This case report highlights the detection,treatment/maintenance with idarubicin,all-trans-retinoic-acid,arsenic trioxide,methotrexate,6-mercaptopurine,and ommaya reservoir intrathecal methotrexate administration in a patient that had central nervous system relapse of acute promyelocytic leukemia and acquired sideroblastic anemia.CONCLUSION In essence,first time relapse concerning the central nervous system in treated acute promyelocytic leukemia patients who had a good response to therapy is very uncommon.The acquirement of a myelodysplastic syndrome such as ringed sideroblastic anemia is also rare regarding this patient population.Although such cases are infrequent,this case report represents a unique insight of the detection,treatment,and maintenance of a 60-year-old man diagnosed with acute promyelocytic leukemia,resulting in the acquirement of sideroblastic anemia and central nervous system relapse.
基金Supported by National Natural Science Foundation of China,No.81173403
文摘Therapy-related acute myeloid leukemia(t-AML) refers to a heterogeneous group of myeloid neoplasms that develop in patients following extensive exposure to either cytotoxic agents or radiation.The development of t-AML has been reported following treatment of cancers ranging from hematological malignancies to solid tumors; however, to our knowledge, t-AML has never been reported following treatment of gastric cancer.In this study, we report the development of t-acute promyelocytic leukemia in a cT 4N1M0 gastric cancer patient after an approximate 44 mo latency period following treatment with 4 cycles of oxaliplatin(OXP)(85 mg/m2 on day 1) plus capecitabine(1250 mg/m2 orally twice daily on days 1-14) in combination with recombinant human granulocyte-colony stimulating factor treatment.Karyotype analysis of the patient revealed 46,XY,t(15;17)(q22;q21)[15]/46,idem,-9,+add(9)(p22)[2]/46,XY[3], which, according to previous studies, includes some "favorable" genetic abnormalities.The patient was then treated with all-trans retinoic acid(ATRA, 25 mg/m2/d) plus arsenic trioxide(ATO, 10 mg/d) and attained complete remission.Our case illuminated the role of certain cytotoxic agents in the induction of t-AML following gastric cancer treatment.We recommend instituting a mandatory additional evaluation for patients undergoing these therapies in the future.
文摘The differentiation syndrome is an inflammatory reaction with increased capillary permeability that occurs in up to 25% of patients with acute promyelocytic leukemia treated with all-trans retinoic acid. A 50-year-old man with acute promyelocytic leukemia underwent chemotherapy with idarubicin and all-trans retinoic acid. On day +21 the patient developed pruritic prepatelar papules as well as several 10 mm subcutaneous nodules in both thighs accompanied by persistent fever. On the day +25 the patient presented with bilateral pulmonary crackles, infiltrates in the right lower lobe and severe hypotension which required dopamine infusion. Biopsy of one of the thighs nodules was performed. A Sweet syndrome associated to a differentiation syndrome was suspected. All-trans retinoic acid therapy was discontinued and dexamethasone was administered. In 48 h the patient showed remission of the fever and the infiltrates and the skin lesions acquired a residual aspect. It is debatable whether these two syndromes are distinct entities with common mechanisms or whether they are poles of the same spectrum. Dermatologists and hematologists must be aware of these two syndromes and its pathophysiologic association.
文摘Objective:To investigate the clinical effect of hydrogen sulfide on acute promyelocytic leukemia (acute promyelocytic leukemia APL) complicated with infection.Methods: A total of 30 cases patients of APL complicated with infection were selected as experimental group, 26 cases patients with only APL as control group. Detect the H2S, C-reactive protein (CRP), tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β) and interleukin-10 (IL-10) level in the blood of the experimental group and control group, comparing the above indicators have no significant difference between the two groups.Results: Experimental group of blood H2S, CRP, TNF-α and IL-1β levels were significantly increased, IL-10 decreased, which was statistically significant compared with the control group;the H2S, CRP, TNF-αand IL-1βlevels of the experimental group after the treatment were significantly decreased, IL-10 level increased, There was statistical significance compared with the experimental group before the treatment;compared with the control group, the difference was not statistically significant. The experimental group H2S was positively correlated with CRP, TNF-α and IL-1β, H2S was negatively correlated with IL-10.Conclusions: Endogenous H2S is involved in the pathophysiological process of inflammation in APL with infection, and its role may be similar to that of CRP, TNF-α and IL-1β, which is contrary to the effect of IL-10.
文摘Neurological manifestations are rare as initial presentation in acute promyelocytic leukemia (APL). This case illustrates status epilepticus as initial presentation in this disease. Atypical cells on peripheral smear led to the diagnosis of leukemia.
文摘Clinical observations were retrospectively compared between 2 matched groups of patients with acute promyelocytic leukemia (APL) each 20. The first group were treated with chemotherapy, the other with all-tram retinoic acid (ATRA) alone at a dose of 45-60mg/M^2/d. The complete remission (CR) rate of ATRA group was significantly higher than that of chemotherapy (90% vs 55%). The time for obtaining CR as well as the duration of fever and hospitalization were shorter and the amount of blood transfused was less in the former than in the latter group. Seven cases were complicated by DIC and 4 died in the group of chemotherapy, while no case was by of DIC or death in the ATRA group. The mechanism was discussed. ATRA is an alternative effective drug for remission induction therapy in APL with high rate of CR.
文摘Acute promyelocytic leukemia (APL) represents the first example o f a human cancer successfully treated with a differentiation reducer, all-trans retinoic acid. APL is also characterized by a specific chromosome translocution t (15; 17). In this work, using techniques of molecular biology, we demonstrated that the gene coding for the retinoic acid receptor alpha (RARA), normally located on chromosome 17, was disrupted by the t (15; 17) and fused with the PML gene on chromosome 15. The chromosome 17 breaks were mapped consistently within the second intron of the RARA gene while the chromosome 15 breaks were clustered in two limited regions within the PML gene. Molecular cloning and sequence analysis of part of the PML gene allowed to establish a specific "nested" reverse transcription/polymerase chain reaction (PCR) procedure to characterize the expression patterns of the PML-RARA fusion gene. Different iso forms of the fusion transcripts were discovered which were produced as a result of distinct PML gene rearrangements. The biological activity of the PML-RARA fusion gene and its iso forms should be further explored.
基金Natural Science Foundation of Zhejiang Province,No.LY19H290003Zhejiang Provincial Medical and Health Science and Technology Project,No.2020KY196and Foundation of Zhejiang Province Chinese Medicine Science and Technology Planes,No.2017ZB030.
文摘BACKGROUND Therapy-related acute promyelocytic leukemia(t-APL)is a rare complication observed in solitary bone plasmacytoma(SBP),and SBP after radiotherapy evolving to APL harboring the FMS-like tyrosine kinase 3-internal tandem duplication(FLT3-ITD)mutation has never been reported.Here,we present the first case reported until now.CASE SUMMARY We describe a 64-year-old woman who presented with lumbar pain and was initially diagnosed with SBP.However,after one year of radiotherapy treatment,this patient experienced a long-standing bone-marrow-suppressive period and finally developed APL harboring the FLT3-ITD mutation,as confirmed by analyses of clinical features,bone marrow morphology,flow cytometry,cytogenetic examination,and molecular biology.On admission,the patient had disseminated intravascular coagulation and intracranial hemorrhage,and the peripheral blood and bone marrow smear displayed abundant abnormal promyelocytes.Unfortunately,she died when the definite diagnosis was made.CONCLUSION The patient with t-APL harboring FLT3-ITD mutation evolving from SBP after radiotherapy had not been reported and had poor clinical outcomes.FLT3-ITD mutation in t-APL may be a potential pathogenesis of leukemogenesis.We should consider the potential risk of secondary neoplasms in SBP patients after radiotherapy.
文摘Objective:To study the effect of arsenic trioxide (As2O3) combined with phorbol ester (PMA) on the proliferation of acute promyelocytic leukemia cell line Kasumi-1.Methods:Acute promyelocytic leukemia cell lines Kasumi-1 were cultured and randomly divided into control group (treated with the RPMI1640 medium without drugs or serum), As2O3 group (treated with serum-free RPMI1640 medium containing 20 μmol/L As2O3), PMA group (treated with serum-free RPMI1640 medium containing 160 nmol/L PMA) and As2O3+ PMA group (treated with serum-free RPMI1640 medium containing 20 μmol/L As2O3 and 160 nmol/L PMA). After treatment, the cell proliferation activity, cell cycle ratio and the protein expression of related genes were measured.Results: 12 h, 24 h and 48 h after treatment, the cell proliferation activity of As2O3 group, PMA group and As2O3+PMA group were significantly lower than that of control group, and the cell proliferation activity of As2O3+PMA group was significantly lower than that of As2O3 group and PMA group;48 h after treatment, the G1 phase and S phase ratio as well as CDK1 and CyclinB1 expression of As2O3 group, PMA group and As2O3+PMA group were significantly lower than those of control group while the G2 phase ratio as well as Bax, Caspase-3, Caspase-9, p-Chk1 and p-Cdc25C9 expression were significantly higher than those of control group;the G1 phase and S phase ratio as well as CDK1 and CyclinB1 expression of As2O3+PMA group were significantly lower than those of As2O3 group and PMA group while the G2 phase ratio as well as Bax, Caspase-3, Caspase-9, p-Chk1 and p-Cdc25C9 expression was significantly higher than those of As2O3 group and PMA group.Conclusion:As2O3 combined with PMA can inhibit the proliferation of acute promyelocytic leukemia cell line Kasumi-1 by inducing apoptosis and blocking cell cycle.
文摘Objective:To investigate the changes and significances of plasma hydrogen sulfide (H2S) and nitric oxide (NO) concentration in patients with acute promyelocytic leukemia (APL) before and after treatment.Methods:A total of 26 hospitalized patients with APL in initial treatment were randomly selected as the case group and 26 healthy persons were regarded as control group. The concentrations of H2S and NO in plasma of case group and control group were determined, The acute stage and clinical remission of case group were respectively compared with control group which had no statistical difference.Results:The concentrations of H2S and NO in plasma in acute stage patients were significantly increased, which had statistical significance compared with clinical remission stage and control group. The concentrations of H2S and NO in the plasma of patients in clinical remission after treatment were decreased, close to the healthy control group and the difference had no statistical significance. The change trend of H2S concentration was consistent with NO concentration in plasma of case group before and after treatment and there was positive correlation between them.Conclusions:Endogenous H2S and NO may be involved in the pathophysiological process of APL, and the change trend is consistent and there was positive correlation between them.
文摘Objective: To investigate the correlation between plasma hydrogen sulfide (H2S), homocysteine (Hcy), folic acid and vitamin B12 in patients with acute promyelocytic leukemia (APL) before and after treatment. Methods:A total of 26 hospitalized patients with APL were randomly selected as case group and 26 healthy persons as control group. The concentration of H2S, Hcy and folic acid in plasma of case group and control group were measured, respectively. The statistically significant difference was investigated by comparing the acute onset phase and clinical remission of case group with those of healthy control group. Results:The concentration of H2S and Hcy of plasma in patients of case group during acute onset phase significantly increased, and concentration of folic acid significantly decreased, and there were both statistically significant differences as compared with those during clinical remission and those of control group (P<0.01). The concentration of H2S and Hcy of plasma in patients of case group during clinical remission after treatment decreased, and concentration of folic acid increased. The result was close to that of healthy control group, and there was no statistically significant difference (P>0.05). The change in concentration of plasma H2S was positively correlated with that of Hcy and negatively correlated with that of folic acid in patients of case group before and after treatment. Conclusions:The increase of plasma H2S in patients with APL may be related to the changes in concentration of Hcy and folic acid.