AIM: To identify a multi serum protein pattern as well as single protein markers using surface-enhanced laser desorption/ionisation time-of-flight mass spectrometry (SELDI-TOF-MS) for detection and differentiation ...AIM: To identify a multi serum protein pattern as well as single protein markers using surface-enhanced laser desorption/ionisation time-of-flight mass spectrometry (SELDI-TOF-MS) for detection and differentiation of liver fibrosis (F1-F2), liver cirrhosis (F4) and hepatocellular carcinoma (HCC) in patients with chronic hepatitis C virus (HCV). METHODS: Serum samples of 39 patients with F1/F2 fibrosis, 44 patients with F4 fibrosis, 34 patients with HCC were applied to CM10 arrays and analyzed using the SELDI-TOF ProteinChip System (PBS-Ⅱc; Ciphergen Biosystems) after anion-exchange fractionation. All patients had chronic hepatitis C and histologically confirmed fibrosis stage/HCC. Data were analyzed for protein patterns by multivariate statistical techniques and artificial neural networks. RESULTS: A 4 peptide/protein multimarker panel (7486, 12843, 44293 and 53598 Da) correctly identified HCCs with a sensitivity of 100% and specificity of 85% in a two way-comparison of HCV-cirrhosis versus HCV-HCC training samples (AUROC 0.943). Sensitivity and specificity for identification of HCC were 68% and 80% for random test samples. Cirrhotic patients could be discriminated against patients with F1 or F2 fibrosis using a 5 peptide/protein multimarker pattern (2873, 6646, 7775, 10525 and 67867 Da) with a specificity of 100% and a sensitivity of 85% in training samples (AUROC 0.976) and a sensitivity and specificity of 80% and 67% for random test samples. Combination of the biomarker classifiers with APR/score and alfa-fetopotein (AFP) improved the diagnostic performance. The 6646 Da marker protein for liver fibrosis was identified as apolipoprotein C-I. CONCLUSION: SELDI-TOF-MS technology combined with protein pattern analysis seems a valuable approach for the identification of liver cirrhosis and hepatocellular carcinoma in patients with chronic hepatitis C. Host probably a combination of different serum markers will help to identify liver cirrhosis and early-stage hepatocellular carcinomas in the future.展开更多
AIM: To evaluate plasma levels of nitrite/nitrate (NOx), soluble Pas (spas) antigen, tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6) in patients with compensated and acute decompensated cirrhosi...AIM: To evaluate plasma levels of nitrite/nitrate (NOx), soluble Pas (spas) antigen, tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6) in patients with compensated and acute decompensated cirrhosis and to evaluate mediators causing acute decompensation in liver cirrhosis, METHODS: This prospective study was conducted in the medical intensive care unit of an academic tertiary center, Fifty-five patients with acute decompensation (gastrointestinal hemorrhage, encephalopathy, hydropic decompensation) and twenty-five patients with compensated liver drrhosis were included, Blood samples were taken for analyses of spas, Nox, IL-6, TNF-α, Liver enzymes and kidney functions were also tested, RESULTS: In patients with acute decompensation, plasma spas levels were higher than in non-decompensated patients (15305 ± 4646 vs 12458± 4322 pg/mL, P 〈 0.05). This was also true for the subgroup of patients with alcoholic liver cirrhosis (P 〈 0.05). The other mediators were not different and none of the parameters predicted survival, except for ALT (alanine-aminotransferase). In patients with portal-hypertension-induced acute hemorrhage, NOx levels were significantly lower than in patients with other forms of decompensation (70.8 ± 48.3 vs 112.9 ± 74.9 pg/mL, P 〈 0.05). When NOx levels were normalized to creatinine levels, the difference disappeared. IL-6, TNF-α and spas were not different between bleeders and non-bleeders. In decompensated patients spas, IL-6 and NOx levels correlated positively with creatinine levels, while IL-6 levels were dependent on Child class. CONCLUSION: In acute decompensated cirrhotic patients sPas is increased, suggesting a role of apoptosis in this process and patients with acute bleeding have lower NOx levels, However, in this acute complex clinical situation, kidney function seems to have a predominant influence on mediator levels,展开更多
AIM: Small intestinal ischemia-reperfusion (IR) has been demonstrated to result in both local mucosal injury and systemic injuries. The exact role of nitric oxide (NO) in intestinal IR is unclear. We propose that NO a...AIM: Small intestinal ischemia-reperfusion (IR) has been demonstrated to result in both local mucosal injury and systemic injuries. The exact role of nitric oxide (NO) in intestinal IR is unclear. We propose that NO and some other cytokines change in the reperfusion period and these changes are associated with lung injury. The aim of this study was to determine the effect of supplementing NO substrate, L-arginine (L-arg), on serum and pulmonary cytokine production during small intestinal IR in immature rats. METHODS: Immature rats underwent 60 min. of superior mesenteric artery occlusion followed by 90 min of reperfusion. L-arg (250 mg/kg) was given intravenously to the experimental group (IR+L-arg) which received L-arg after 45 min of intestinal ischemia. Serum and lung endothelin-1 (ET-1), NO, malondialdehyde (MDA), and tumor necrosis factor a (TNFα) were measured. Sham operation (SHAM) and intestinal IR (IR) groups were performed as control. The lavage fluid of the lung was collected by bronchoalveolar lavage (BAL) and white blood cells and polymorphonuclear cells (PMNs) were immediately counted to identify lung damage. RESULTS: When L-arg was given during small intestinal IR, serum NO concentration increased significantly in IR+L-arg group (162.17±42.93 μmol/L) when compared with IR group (87.57±23.17 μmol/L, t=3.190, P= 0.008 <0.01). Serum MDA reduced significantly in IR+L-arg group (8.93±1.50 nmol/L) when compared with SHAM (23.78±7.81 nmol/L, t= 3.243, P= 0.007<0.01) and IR (25.54±9.32 nmol/L, t= 3.421, P= 0.006<0.01). ET-1 level in lung tissues was significantly lower in IR+L-arg group (13.81±7.84 pg/mL) than that in SHAM (35.52±10.82 pg/mL, t= 2,571, P= 0,03<0.05) and IR (50.83±22.05 pg/mL, t= 3.025, P= 0.009<0.01) groups. MDA contents in lung tissues were significantly lower in IR+L-arg group (10.73±1.99 nmol/L) than in SHAM (16.62±2.28 nmol/L, t= 3.280, P = 0.007<0.01) and IR (21.90±4.82 nmol/L, t= 3.322, P= 0.007<0.01) groups. Serum and lung TNFα concentrations were not significantly different in three groups. NO contents in lung homogenates and white blood cell counts in BAL had no significant difference in three groups; but the percentage of PMNs in BAL was 13.50±8.92, 33.20±16.59, and 22.50±6.09 in SHAM, IR, and IR+L-arg groups, respectively. CONCLUSION: Small intestinal IR induced increases of pulmonary neutrophil infiltration in immature rats. Neutrophil infiltration in lung tissues was reduced by L-arg administration but remained higher than in SHAM group. L-arg administration during intestinal IR enhances serum NO production, reduces serum MDA and lung ET-1 and MDA levels, resulting in the improvement of systemic endothelial function. L-arg supplementation before reperfusion may act as a useful clinical adjunct in the management of intestinal IR, thus preventing the development of adult respiratory distress syndrome, even multiple organ dysfunction syndrome (MODS).展开更多
AIM:To determine whether serum interleukin-18 (IL-18) levels correlated with clinicopathologic features and prognosis in patients with hepatocellular carcinoma (HCC). METHODS:Serum IL-18,IL-6 and IL-12 levels were mea...AIM:To determine whether serum interleukin-18 (IL-18) levels correlated with clinicopathologic features and prognosis in patients with hepatocellular carcinoma (HCC). METHODS:Serum IL-18,IL-6 and IL-12 levels were measured by enzyme-linked immunosorbent assay (ELISA) from 70 patients with HCC and 10 healthy controls. RESULTS:Serum IL-18,IL-6 and IL-12 levels of patients with HCC were significantly higher that those of the controls. The levels of IL-18 correlated significantly with the presence of venous invasion and advanced tumor stages classified by Okuda's criteria. Patients with high serum IL-18 levels (≥ 105 pg/mL) had a poorer survival than those with low serum IL-18 levels (< 105 pg/mL) (4 and 11 mo,respectively,P = 0.015). Multivariate analyses showed that serum IL-18 level,but not IL-6 and IL-12 levels,was a significant and independent prognostic factor of survival. CONCLUSION:These findings demonstrate that serum IL-8 may a useful biological marker of tumor invasiveness and an independent prognostic factor of survival for patients with HCC. Thus,the detailed mechanisms of IL-18 involving in tumor progression should be further investigated.展开更多
AIM: To perform a long culture passage of H pylori without serum, taking into account its cytotoxicity and the presence of the probable new cytotoxic factor. METHODS: One sample of H pylon 60190 (ATCC 49503) was g...AIM: To perform a long culture passage of H pylori without serum, taking into account its cytotoxicity and the presence of the probable new cytotoxic factor. METHODS: One sample of H pylon 60190 (ATCC 49503) was grown on Brain Heart Infusion (BHI) agar containing 0.5% 2,6-di-O-methyl-β-cyclodextrin without any serum, being passaged 70-100 times every 3-4 d for approximately 2 h, while another sample of H pylori contained 70 mL/L fetal calf serum without 2,6-di-O- methyl-β-cyclodextrin. Their supernatant and extract after 16 h in culture were evaluated for changes in cell morphology and for cell viability using HeLa cells. Furthermore, the characteristics of the probable cytotoxic factor in the extract were examined on partial purification studies and its oytotoxicity was evaluated in various human cells. RESULTS: The supernatant and the extract of the bacterium grown on serum-free medium had strong cytotoxicity compared with those grown on serumcontaining medium. They irreversibly damaged HeLa cells without vacuolation that was altogether different from that of the bacterium when grown with serum. Their cytotoxicity was easily measured by cell viability assay. The probable cytotoxic factor partially purified and detected by chromatography had characteristics difference from that of vacuolating toxin and a broad cytotoxicity toward various cell lines. CONCLUSION: Serum-free long culture method of H pylorl makes its supernatant and its extract cytotoxic enough to be easily measured by cell viability assay. The probable cytotoxic factor has a unique characteristic and might be a new cytotoxin.展开更多
Viruses (e.g. Human immunodeficiency virus, Human simplex virus and Prototype foamy virus) are obligate intracellular parasites and therefore depend on the cellular machinery for cellular trafficking. Bovine foamy vir...Viruses (e.g. Human immunodeficiency virus, Human simplex virus and Prototype foamy virus) are obligate intracellular parasites and therefore depend on the cellular machinery for cellular trafficking. Bovine foamy virus (BFV) is a member of the Spumaretrovirinae subfamily of Retroviruses, however, details of its cellular trafficking remain unknown. In this study, we cloned the BFV gag gene into prokaryotic expression vector pET28a and purified the denaturalized Gag protein. The protein was used to immunize BALB/c mouse to produce antiserum, which could specifically recognize the BFV Gag protein in BFV-infected cells through western blot assay. Additionally, these results demonstrated that both the optimal and suboptimal cleavage of Gag protein occur in BFV-infected cells. Subsequently, the Gag antiserum was used to investigate subcellular localization of BFV. In immunofluorescence microscopy assays, colocalization microtubules (MTs) and assembling viral particles were clearly observed, which implied that BFV may transport along cellular MTs in host cells. Furthermore, MTs-depolymerizing assay indicated MTs were required for the efficient replication of BFV. In conclusion, our study suggests that BFV has evolved the mechanism to hijack the cellular cytoskeleton for its replication.展开更多
Drug-induced hypersensitivity syndrome(DIHS) is a severe reaction usually characterized by fever,rash,and multiorgan failure,occurring 2-6 wk after drug introduction.It is an immune-mediated reaction involving macroph...Drug-induced hypersensitivity syndrome(DIHS) is a severe reaction usually characterized by fever,rash,and multiorgan failure,occurring 2-6 wk after drug introduction.It is an immune-mediated reaction involving macrophage and T-lymphocyte activation and cytokine release.A 54-year-old woman was diagnosed with rheumatic arthritis and initiated salazosulfapyridine by mouth.About 10 d later,she had a high fever,skin rash and liver dysfunction.She was admitted to hospital and diagnosed with a drug eruption.She was treated with oral prednisolone 30 mg/d;however,she developed high fever again and her blood tests showed acute liver failure and cytopenia associated with hyperferritinemia.She was diagnosed with acute liver failure and hemophagocytosis caused by DIHS.She was transferred to the Department of Medicine and Bioregulatory Science,Kyushu University,where she was treated with arterial steroid injection therapy.Following this treatment,her liver function improved and serum ferritin immediately decreased.We hypothesized that an immune-mediated reaction in DIHS may have generated over-activation of macrophages and T-lymphocytes,followed by a cytokine storm that affected various organs.The measurement of serum ferritin might be a useful marker of the severity of DIHS.展开更多
Objective:The aim of this study was to explore clinical efficiency of radio frequency combined with 131I therapy for dedifferentiated thyroid carcinoma.Methods:All patients have been treated by radiofrequency connecte...Objective:The aim of this study was to explore clinical efficiency of radio frequency combined with 131I therapy for dedifferentiated thyroid carcinoma.Methods:All patients have been treated by radiofrequency connected with 131I in 29 cases of dedifferentiated thyroid carcinoma which performed radionuclide imaging and Ig array of blood serum before and after therapy,respectively.Results:There were 4(4/29) positive cases of radionuclide imaging before treatment and 19(19/29) cases 2 weeks after therapy,25(25/29) cases of overall efficacy and 15(15/29) curative cases. Conclusion: Radiofrequency connected with 131I improve clinical efficacy of 131I treatment for dedifferentiated thyroid cancer of thyroid in view of higher absorbing 131I of thyroid cancerous cell.展开更多
It is well known that serum immunosuppressive factors play an important role in the mechanism of postburn immunosuppression.This study was intended to investigate the effect of haptoglobin, purified from the serum of ...It is well known that serum immunosuppressive factors play an important role in the mechanism of postburn immunosuppression.This study was intended to investigate the effect of haptoglobin, purified from the serum of burned patients by affinity chromatography,on the proliferation and interleukin-2(IL-2) secretion of normal murine thymocytes induced by ConA and the proliferation of IL-2 dependent cell line(CTLL-2) stimulated by recombinant human IL-2,so as to elucidate the role of serum haptoglobin in postburn T-lymphocyte dysfunction.The results showed that purified haptoglobin,at the level equivalent to the concentration found in serum of burned patients,significantly inhibited the proliferation and IL-2 secretion of normal murine thymocytes as well as CTLL-2 proliferation;whereas it exhibited no immunosuppressive effects at the level equivalent to the concentration found in serum of nomal volunteers.According to the results reported here,it is suggested that extraordinary increase in serum haptoglobin level may be an important factor of impaired T-lymphocyte responses following burns.展开更多
Objective To detect the serum granulocyte colony-stimulating factor (G-CSF) levels betweenthe patients with frequently repeated infection ( repeaters) and others (non-repeaters) in different phase of infection.Methods...Objective To detect the serum granulocyte colony-stimulating factor (G-CSF) levels betweenthe patients with frequently repeated infection ( repeaters) and others (non-repeaters) in different phase of infection.Methods An enzyme-linked immunosorbent assay (ELISA) method was used to detect serum G-CSF levels in 50cases (32 non-repeaters and 18 repeaters) with acute phase of infection. Serum G-CSF levels were detected inrecovery phase in 10 cases. Results Serum G-CSF levels were significantly higher (1429. 97 ±506. 43ng/L) in32 non-repeaters with acute infection. There was a positive correlation between white blood cell count ( WBC) andserum G-CSF level (r =0. 396, P <0. 05). There was also a positive correlation between absolute neutrophil count(ANC) and serum G-CSF level (r =0. 346,P <0. 05). Serum G-CSF levels were higher (98. 62 ±56. 40ng/L) in18 repeaters with acute infection. It was showed that serum G-CSF levels were significantly higher in non-repeatersthan in repeaters with acute phase of infection (P <0. 001). In the meanwhile, the body temperature was signifi-cantly higher in non-repeaters than in repeaters with acute infection (37. 95 ±0. 14 vs 36. 91 ±0. 13 ,P<0. 001). There were no significant differences in age, WBC, ANC, type of bacterial, liver function and renal func-tion (P >0. 05). Serum G-CSF levels in recovery phase of the two groups were below the sensitivity of the assay( <60 ng/L). Conclusion It is suggested that application of recombinant G-CSF may be useful for the patientswith repeated infection.展开更多
OBJECTIVE:To investigate biological indicators of sub-optimal health status and provide means of objective assessment of sub-optimal health status.METHODS:We set the unified standards for diagnosing a SHS.We tested va...OBJECTIVE:To investigate biological indicators of sub-optimal health status and provide means of objective assessment of sub-optimal health status.METHODS:We set the unified standards for diagnosing a SHS.We tested various laboratory indicators in 407 cases that we selected randomly from2807 subjects and collected 15 mL of fasting venous blood from each case.We measured serum immunoglobulin A(IgA)and immunoglobulin G(IgG)concentrations,serum beta endorphins(β-EP),cortisol(C),testosterone(T),plasma adrenocorticotropic hormone(ACTH)and serum T lymphocyte subsets CD3+and CD4+.RESULTS:Mean serum testosterone concentrations and their ratio to cortisol(C)concentrations weresignificantly higher in the healthy group than in those with sub-optimal health status(P<0.01).Mean serum CD3+concentrations were significantly higher in those with sub-optimal health status than in the healthy group(P<0.05).CONCLUSION:Decreased serum testosterone/cortisol ratio may be an objective indication of sub-optimal health status.Changes in neuroendocrine and immunological indicators may explain some of the symptoms,including malaise and poor work performance,attributable to persistent or relapsing fatigue in subjects with sub-optimal health status.展开更多
基金Supported by a research grant of the Jurgen Manchot Stiftung
文摘AIM: To identify a multi serum protein pattern as well as single protein markers using surface-enhanced laser desorption/ionisation time-of-flight mass spectrometry (SELDI-TOF-MS) for detection and differentiation of liver fibrosis (F1-F2), liver cirrhosis (F4) and hepatocellular carcinoma (HCC) in patients with chronic hepatitis C virus (HCV). METHODS: Serum samples of 39 patients with F1/F2 fibrosis, 44 patients with F4 fibrosis, 34 patients with HCC were applied to CM10 arrays and analyzed using the SELDI-TOF ProteinChip System (PBS-Ⅱc; Ciphergen Biosystems) after anion-exchange fractionation. All patients had chronic hepatitis C and histologically confirmed fibrosis stage/HCC. Data were analyzed for protein patterns by multivariate statistical techniques and artificial neural networks. RESULTS: A 4 peptide/protein multimarker panel (7486, 12843, 44293 and 53598 Da) correctly identified HCCs with a sensitivity of 100% and specificity of 85% in a two way-comparison of HCV-cirrhosis versus HCV-HCC training samples (AUROC 0.943). Sensitivity and specificity for identification of HCC were 68% and 80% for random test samples. Cirrhotic patients could be discriminated against patients with F1 or F2 fibrosis using a 5 peptide/protein multimarker pattern (2873, 6646, 7775, 10525 and 67867 Da) with a specificity of 100% and a sensitivity of 85% in training samples (AUROC 0.976) and a sensitivity and specificity of 80% and 67% for random test samples. Combination of the biomarker classifiers with APR/score and alfa-fetopotein (AFP) improved the diagnostic performance. The 6646 Da marker protein for liver fibrosis was identified as apolipoprotein C-I. CONCLUSION: SELDI-TOF-MS technology combined with protein pattern analysis seems a valuable approach for the identification of liver cirrhosis and hepatocellular carcinoma in patients with chronic hepatitis C. Host probably a combination of different serum markers will help to identify liver cirrhosis and early-stage hepatocellular carcinomas in the future.
文摘AIM: To evaluate plasma levels of nitrite/nitrate (NOx), soluble Pas (spas) antigen, tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6) in patients with compensated and acute decompensated cirrhosis and to evaluate mediators causing acute decompensation in liver cirrhosis, METHODS: This prospective study was conducted in the medical intensive care unit of an academic tertiary center, Fifty-five patients with acute decompensation (gastrointestinal hemorrhage, encephalopathy, hydropic decompensation) and twenty-five patients with compensated liver drrhosis were included, Blood samples were taken for analyses of spas, Nox, IL-6, TNF-α, Liver enzymes and kidney functions were also tested, RESULTS: In patients with acute decompensation, plasma spas levels were higher than in non-decompensated patients (15305 ± 4646 vs 12458± 4322 pg/mL, P 〈 0.05). This was also true for the subgroup of patients with alcoholic liver cirrhosis (P 〈 0.05). The other mediators were not different and none of the parameters predicted survival, except for ALT (alanine-aminotransferase). In patients with portal-hypertension-induced acute hemorrhage, NOx levels were significantly lower than in patients with other forms of decompensation (70.8 ± 48.3 vs 112.9 ± 74.9 pg/mL, P 〈 0.05). When NOx levels were normalized to creatinine levels, the difference disappeared. IL-6, TNF-α and spas were not different between bleeders and non-bleeders. In decompensated patients spas, IL-6 and NOx levels correlated positively with creatinine levels, while IL-6 levels were dependent on Child class. CONCLUSION: In acute decompensated cirrhotic patients sPas is increased, suggesting a role of apoptosis in this process and patients with acute bleeding have lower NOx levels, However, in this acute complex clinical situation, kidney function seems to have a predominant influence on mediator levels,
基金Supported by The Natural Scientific Foundation of Shandong Province, No. Q99C13
文摘AIM: Small intestinal ischemia-reperfusion (IR) has been demonstrated to result in both local mucosal injury and systemic injuries. The exact role of nitric oxide (NO) in intestinal IR is unclear. We propose that NO and some other cytokines change in the reperfusion period and these changes are associated with lung injury. The aim of this study was to determine the effect of supplementing NO substrate, L-arginine (L-arg), on serum and pulmonary cytokine production during small intestinal IR in immature rats. METHODS: Immature rats underwent 60 min. of superior mesenteric artery occlusion followed by 90 min of reperfusion. L-arg (250 mg/kg) was given intravenously to the experimental group (IR+L-arg) which received L-arg after 45 min of intestinal ischemia. Serum and lung endothelin-1 (ET-1), NO, malondialdehyde (MDA), and tumor necrosis factor a (TNFα) were measured. Sham operation (SHAM) and intestinal IR (IR) groups were performed as control. The lavage fluid of the lung was collected by bronchoalveolar lavage (BAL) and white blood cells and polymorphonuclear cells (PMNs) were immediately counted to identify lung damage. RESULTS: When L-arg was given during small intestinal IR, serum NO concentration increased significantly in IR+L-arg group (162.17±42.93 μmol/L) when compared with IR group (87.57±23.17 μmol/L, t=3.190, P= 0.008 <0.01). Serum MDA reduced significantly in IR+L-arg group (8.93±1.50 nmol/L) when compared with SHAM (23.78±7.81 nmol/L, t= 3.243, P= 0.007<0.01) and IR (25.54±9.32 nmol/L, t= 3.421, P= 0.006<0.01). ET-1 level in lung tissues was significantly lower in IR+L-arg group (13.81±7.84 pg/mL) than that in SHAM (35.52±10.82 pg/mL, t= 2,571, P= 0,03<0.05) and IR (50.83±22.05 pg/mL, t= 3.025, P= 0.009<0.01) groups. MDA contents in lung tissues were significantly lower in IR+L-arg group (10.73±1.99 nmol/L) than in SHAM (16.62±2.28 nmol/L, t= 3.280, P = 0.007<0.01) and IR (21.90±4.82 nmol/L, t= 3.322, P= 0.007<0.01) groups. Serum and lung TNFα concentrations were not significantly different in three groups. NO contents in lung homogenates and white blood cell counts in BAL had no significant difference in three groups; but the percentage of PMNs in BAL was 13.50±8.92, 33.20±16.59, and 22.50±6.09 in SHAM, IR, and IR+L-arg groups, respectively. CONCLUSION: Small intestinal IR induced increases of pulmonary neutrophil infiltration in immature rats. Neutrophil infiltration in lung tissues was reduced by L-arg administration but remained higher than in SHAM group. L-arg administration during intestinal IR enhances serum NO production, reduces serum MDA and lung ET-1 and MDA levels, resulting in the improvement of systemic endothelial function. L-arg supplementation before reperfusion may act as a useful clinical adjunct in the management of intestinal IR, thus preventing the development of adult respiratory distress syndrome, even multiple organ dysfunction syndrome (MODS).
基金Supported by the Rajadapiseksompoj research grant,Faculty of Medicine,Chulalongkorn University
文摘AIM:To determine whether serum interleukin-18 (IL-18) levels correlated with clinicopathologic features and prognosis in patients with hepatocellular carcinoma (HCC). METHODS:Serum IL-18,IL-6 and IL-12 levels were measured by enzyme-linked immunosorbent assay (ELISA) from 70 patients with HCC and 10 healthy controls. RESULTS:Serum IL-18,IL-6 and IL-12 levels of patients with HCC were significantly higher that those of the controls. The levels of IL-18 correlated significantly with the presence of venous invasion and advanced tumor stages classified by Okuda's criteria. Patients with high serum IL-18 levels (≥ 105 pg/mL) had a poorer survival than those with low serum IL-18 levels (< 105 pg/mL) (4 and 11 mo,respectively,P = 0.015). Multivariate analyses showed that serum IL-18 level,but not IL-6 and IL-12 levels,was a significant and independent prognostic factor of survival. CONCLUSION:These findings demonstrate that serum IL-8 may a useful biological marker of tumor invasiveness and an independent prognostic factor of survival for patients with HCC. Thus,the detailed mechanisms of IL-18 involving in tumor progression should be further investigated.
文摘AIM: To perform a long culture passage of H pylori without serum, taking into account its cytotoxicity and the presence of the probable new cytotoxic factor. METHODS: One sample of H pylon 60190 (ATCC 49503) was grown on Brain Heart Infusion (BHI) agar containing 0.5% 2,6-di-O-methyl-β-cyclodextrin without any serum, being passaged 70-100 times every 3-4 d for approximately 2 h, while another sample of H pylori contained 70 mL/L fetal calf serum without 2,6-di-O- methyl-β-cyclodextrin. Their supernatant and extract after 16 h in culture were evaluated for changes in cell morphology and for cell viability using HeLa cells. Furthermore, the characteristics of the probable cytotoxic factor in the extract were examined on partial purification studies and its oytotoxicity was evaluated in various human cells. RESULTS: The supernatant and the extract of the bacterium grown on serum-free medium had strong cytotoxicity compared with those grown on serumcontaining medium. They irreversibly damaged HeLa cells without vacuolation that was altogether different from that of the bacterium when grown with serum. Their cytotoxicity was easily measured by cell viability assay. The probable cytotoxic factor partially purified and detected by chromatography had characteristics difference from that of vacuolating toxin and a broad cytotoxicity toward various cell lines. CONCLUSION: Serum-free long culture method of H pylorl makes its supernatant and its extract cytotoxic enough to be easily measured by cell viability assay. The probable cytotoxic factor has a unique characteristic and might be a new cytotoxin.
基金The Key Project of the Ministry of Education of China (108028)National Natural Science Foundation of China (3090068)Grant from State Key Laboratory for Infectious Diseases Prevention and Control, SKL (2008SKLID310)
文摘Viruses (e.g. Human immunodeficiency virus, Human simplex virus and Prototype foamy virus) are obligate intracellular parasites and therefore depend on the cellular machinery for cellular trafficking. Bovine foamy virus (BFV) is a member of the Spumaretrovirinae subfamily of Retroviruses, however, details of its cellular trafficking remain unknown. In this study, we cloned the BFV gag gene into prokaryotic expression vector pET28a and purified the denaturalized Gag protein. The protein was used to immunize BALB/c mouse to produce antiserum, which could specifically recognize the BFV Gag protein in BFV-infected cells through western blot assay. Additionally, these results demonstrated that both the optimal and suboptimal cleavage of Gag protein occur in BFV-infected cells. Subsequently, the Gag antiserum was used to investigate subcellular localization of BFV. In immunofluorescence microscopy assays, colocalization microtubules (MTs) and assembling viral particles were clearly observed, which implied that BFV may transport along cellular MTs in host cells. Furthermore, MTs-depolymerizing assay indicated MTs were required for the efficient replication of BFV. In conclusion, our study suggests that BFV has evolved the mechanism to hijack the cellular cytoskeleton for its replication.
文摘Drug-induced hypersensitivity syndrome(DIHS) is a severe reaction usually characterized by fever,rash,and multiorgan failure,occurring 2-6 wk after drug introduction.It is an immune-mediated reaction involving macrophage and T-lymphocyte activation and cytokine release.A 54-year-old woman was diagnosed with rheumatic arthritis and initiated salazosulfapyridine by mouth.About 10 d later,she had a high fever,skin rash and liver dysfunction.She was admitted to hospital and diagnosed with a drug eruption.She was treated with oral prednisolone 30 mg/d;however,she developed high fever again and her blood tests showed acute liver failure and cytopenia associated with hyperferritinemia.She was diagnosed with acute liver failure and hemophagocytosis caused by DIHS.She was transferred to the Department of Medicine and Bioregulatory Science,Kyushu University,where she was treated with arterial steroid injection therapy.Following this treatment,her liver function improved and serum ferritin immediately decreased.We hypothesized that an immune-mediated reaction in DIHS may have generated over-activation of macrophages and T-lymphocytes,followed by a cytokine storm that affected various organs.The measurement of serum ferritin might be a useful marker of the severity of DIHS.
文摘Objective:The aim of this study was to explore clinical efficiency of radio frequency combined with 131I therapy for dedifferentiated thyroid carcinoma.Methods:All patients have been treated by radiofrequency connected with 131I in 29 cases of dedifferentiated thyroid carcinoma which performed radionuclide imaging and Ig array of blood serum before and after therapy,respectively.Results:There were 4(4/29) positive cases of radionuclide imaging before treatment and 19(19/29) cases 2 weeks after therapy,25(25/29) cases of overall efficacy and 15(15/29) curative cases. Conclusion: Radiofrequency connected with 131I improve clinical efficacy of 131I treatment for dedifferentiated thyroid cancer of thyroid in view of higher absorbing 131I of thyroid cancerous cell.
文摘It is well known that serum immunosuppressive factors play an important role in the mechanism of postburn immunosuppression.This study was intended to investigate the effect of haptoglobin, purified from the serum of burned patients by affinity chromatography,on the proliferation and interleukin-2(IL-2) secretion of normal murine thymocytes induced by ConA and the proliferation of IL-2 dependent cell line(CTLL-2) stimulated by recombinant human IL-2,so as to elucidate the role of serum haptoglobin in postburn T-lymphocyte dysfunction.The results showed that purified haptoglobin,at the level equivalent to the concentration found in serum of burned patients,significantly inhibited the proliferation and IL-2 secretion of normal murine thymocytes as well as CTLL-2 proliferation;whereas it exhibited no immunosuppressive effects at the level equivalent to the concentration found in serum of nomal volunteers.According to the results reported here,it is suggested that extraordinary increase in serum haptoglobin level may be an important factor of impaired T-lymphocyte responses following burns.
文摘Objective To detect the serum granulocyte colony-stimulating factor (G-CSF) levels betweenthe patients with frequently repeated infection ( repeaters) and others (non-repeaters) in different phase of infection.Methods An enzyme-linked immunosorbent assay (ELISA) method was used to detect serum G-CSF levels in 50cases (32 non-repeaters and 18 repeaters) with acute phase of infection. Serum G-CSF levels were detected inrecovery phase in 10 cases. Results Serum G-CSF levels were significantly higher (1429. 97 ±506. 43ng/L) in32 non-repeaters with acute infection. There was a positive correlation between white blood cell count ( WBC) andserum G-CSF level (r =0. 396, P <0. 05). There was also a positive correlation between absolute neutrophil count(ANC) and serum G-CSF level (r =0. 346,P <0. 05). Serum G-CSF levels were higher (98. 62 ±56. 40ng/L) in18 repeaters with acute infection. It was showed that serum G-CSF levels were significantly higher in non-repeatersthan in repeaters with acute phase of infection (P <0. 001). In the meanwhile, the body temperature was signifi-cantly higher in non-repeaters than in repeaters with acute infection (37. 95 ±0. 14 vs 36. 91 ±0. 13 ,P<0. 001). There were no significant differences in age, WBC, ANC, type of bacterial, liver function and renal func-tion (P >0. 05). Serum G-CSF levels in recovery phase of the two groups were below the sensitivity of the assay( <60 ng/L). Conclusion It is suggested that application of recombinant G-CSF may be useful for the patientswith repeated infection.
基金Supported by China National Funds for Distinguished Young Scientists(No.30825046)Hi-Tech Research and Development Program of China(863 Program),No.2008AA02Z406Program for Innovative Research Team in Beijing University of Chinese Medicine(No.2011CXTD-07)
文摘OBJECTIVE:To investigate biological indicators of sub-optimal health status and provide means of objective assessment of sub-optimal health status.METHODS:We set the unified standards for diagnosing a SHS.We tested various laboratory indicators in 407 cases that we selected randomly from2807 subjects and collected 15 mL of fasting venous blood from each case.We measured serum immunoglobulin A(IgA)and immunoglobulin G(IgG)concentrations,serum beta endorphins(β-EP),cortisol(C),testosterone(T),plasma adrenocorticotropic hormone(ACTH)and serum T lymphocyte subsets CD3+and CD4+.RESULTS:Mean serum testosterone concentrations and their ratio to cortisol(C)concentrations weresignificantly higher in the healthy group than in those with sub-optimal health status(P<0.01).Mean serum CD3+concentrations were significantly higher in those with sub-optimal health status than in the healthy group(P<0.05).CONCLUSION:Decreased serum testosterone/cortisol ratio may be an objective indication of sub-optimal health status.Changes in neuroendocrine and immunological indicators may explain some of the symptoms,including malaise and poor work performance,attributable to persistent or relapsing fatigue in subjects with sub-optimal health status.