AIM:To detect the expression of tumor necrosis factor-a(TNF-a)in colorectal cancer(CRC)cells among Saudi patients,and correlate its expression with clinical stages of cancer.METHODS:Archival tissue specimens were coll...AIM:To detect the expression of tumor necrosis factor-a(TNF-a)in colorectal cancer(CRC)cells among Saudi patients,and correlate its expression with clinical stages of cancer.METHODS:Archival tissue specimens were collected from 30 patients with CRC who had undergone surgical intervention at King Khalid University Hospital.Patient demographic information,including age and gender,tumor sites,and histological type of CRC,was recorded.To measure TNF-a m RNA expression in CRC,total RNA was extracted from tumor formalin-fixed,paraffinembedded,and adjacent normal tissues.Reverse transcription and reverse transcription polymerase chain reaction were performed.Colorectal tissue microarrays were constructed to investigate the protein expression of TNF-a by immunohistochemistry.RESULTS:The relative expression of TNF-a m RNA in colorectal cancer was significantly higher than that seen in adjacent normal colorectal tissue.High TNF-a gene expression was associated with StageⅢandⅣneoplasms when compared with earlier tumor stages(P=0.004).Eighty-three percent of patients(25/30)showed strong TNF-a positive staining,while only 10%(n=3/30)of patients showed weak staining,and 7%(n=2/30)were negative.We showed the presence of elevated TNF-a gene expression in cancer cells,which strongly correlated with advanced stages of tumor.CONCLUSION:High levels of TNF-a expression could be an independent diagnostic indicator of colorectal cancer,and targeting TNF-a might be a promising prognostic tool by assessment of the clinical stages of CRC.展开更多
Tumor necrosis factor inhibitors(anti-TNFs)are widely used therapies for the treatment of inflammatory bowel diseases(IBD);however,their administration is not risk-free.Heart failure(HF),although rare,is a potential a...Tumor necrosis factor inhibitors(anti-TNFs)are widely used therapies for the treatment of inflammatory bowel diseases(IBD);however,their administration is not risk-free.Heart failure(HF),although rare,is a potential adverse event related to administration of these medications.However,the exact mechanism of development of HF remains obscure.TNFαis found in both healthy and damaged hearts.Its effects are concentration-and receptor-dependent,promoting either cardio-protection or cardiomyocyte apoptosis.Experimental rat models with TNFαreceptor knockout showed increased survival rates,less reactive oxygen species formation,and improved diastolic left ventricle pressure.However,clinical trials employing anti-TNF therapy to treat HF had disappointing results,suggesting abolishment of the cardioprotective properties of TNFα,making cardiomyocytes susceptible to apoptosis and oxidation.Thus,patients with IBD who have risk factors should be screened for HF before initiating anti-TNF therapy.This review aims to discuss adverse events associated with the administration of anti-TNF therapy,with a focus on HF,and propose some approaches to avoid cardiac adverse events in patients with IBD.展开更多
Tumor necrosis factor α （TNF-α） and interferon-γ （IFN-γ） are cytokines with strong antitumor activities. They were reacted with a photoactive arylazide-4-azidobenzoic acid, resulting in photoactive TNF-α and ...Tumor necrosis factor α （TNF-α） and interferon-γ （IFN-γ） are cytokines with strong antitumor activities. They were reacted with a photoactive arylazide-4-azidobenzoic acid, resulting in photoactive TNF-α and IFN-γ. The infrared （IR） spectra of these products showed the characteristic absorption of an azido group at 2127 cm^-1. By photo-immobilization, this modified TNF-α and IFN-γ were immobilized on polystyrene membranes for cell culture to prepare biomaterials. The micro-morphology of photoactive cytokines was observed with a scanning electron microscope （SEM）. The inhibitory effect on growth of Hela cells and inducing apoptosis activity of these two cytokines were analyzed by growth curve, transmission electron microscope （TEM） and fluorescence active cell sorter （FACS）. The results showed that co-immobilization of IFN-γ and TNF-α had significant inhibitory effect on growth of Hela cells, inhibitory rate up to 82%, and IFN-γ had obviously synergistic action.展开更多
AIM: To determine the expression statuses of tumor necrosis factor (TNF)-α, its receptors (TNF-R) and downstream effector molecules in human colorectal adenomas. METHODS: We measured the serum concentrations of TNF-...AIM: To determine the expression statuses of tumor necrosis factor (TNF)-α, its receptors (TNF-R) and downstream effector molecules in human colorectal adenomas. METHODS: We measured the serum concentrations of TNF-α and its receptors in 62 colorectal adenoma patients and 34 healthy controls. The protein expression of TNF-α, TNF-R1, TNF-R2 and downstream signals of the TNF receptors, such as c-Jun N-terminal kinase (JNK), nuclear factor-κ B and caspase-3, were also investigated in human colorectal adenomas and in normal colorectal mucosal tissues by immunohistochemistry. Immunofluorescence confocal microscopy was used to investigate the consistency of expression of TNF-R1 and phospho-JNK (p-JNK). RESULTS: The serum levels of soluble TNF-R1 (sTNF-R1) in adenoma patients were significantly higher than in the control group (3.67 ± 0.86 ng/mL vs 1.57 ± 0.72 ng/mL, P < 0.001). Receiver operating characteristic analysis revealed the high diagnostic sensitivity of TNF-R1 measurements (AUC was 0.928) for the diagnosis of adenoma, and the best cut-off level of TNF-R1 was 2.08 ng/mL, with a sensitivity of 93.4% and a specificity of 82.4%. There were no significant differences in the serum levels of TNF-α or sTNF-R2 between the two groups. Immunohistochemistry showed high levels of TNF-R1 and p-JNK expression in the epithelial cells of adenomas. Furthermore, a high incidence of co-localization of TNF-R1 and p-JNK was identified in adenoma tissue. CONCLUSION: TNF-R1 may be a promising biomarker of colorectal adenoma, and it may also play an important role in the very early stages of colorectal carcinogenesis.展开更多
As an aquatic fish,the spotted halibut Verasper variegatus is highly susceptible to bacterial and virus infections.Tumor necrosis factor-alpha(TNF-α)as a cytokine could control the inflammatory responses.The function...As an aquatic fish,the spotted halibut Verasper variegatus is highly susceptible to bacterial and virus infections.Tumor necrosis factor-alpha(TNF-α)as a cytokine could control the inflammatory responses.The functions of TNF-αin many species have been widely studied,particularly in mammals.However,little is known about the TNF-αfunctions in V.variegatus.We first cloned and sequenced the TNF-αgene in V.variegatus(VvTNF-α).The two conserved cysteine residues,transmembrane sequence,Thr-Leu motif,and TNF family signature,as well as the TA-rich motifs of its proteins related to inflammatory responses had high similarity to those of the other teleost and mammalian TNF-α.The phylogenetic analysis showed that VvTNF-αwas consistent with TNF-αgenes of other vertebrates.The VvTNF-αtranscripts were extensively distributed in the peripheral blood leukocytes(PBLs),spleen,and gill,indicating that the VvTNF-αhad a role in immune function.Furthermore,treatment with pathogen-associated molecular patterns(PAMPs)could induce a rapid and significant increase of VvTNF-αin the PBLs,which reveals that VvTNF-αdoes participate in the host immune responses against bacterial and viral pathogens.We found that VvTNF-αhad an interesting expression pattern during metamorphosis,showing that the flatfish TNF-αmay have some novel functions during specific developmental stages.In addition,the 3 D structure prediction of VvTNF-αprovided an indication of how it is likely to interact with other proteins.Therefore,VvTNF-αhas multiple functions,and provides valuable information to explore novel functions of TNF-α.展开更多
Objective:To analyze scrum leptin levels in patients with malaria falciparum and compare them with healthy controls and correlate with development and outcome of malaria infection.Methods:Sixty cases of malaria falcip...Objective:To analyze scrum leptin levels in patients with malaria falciparum and compare them with healthy controls and correlate with development and outcome of malaria infection.Methods:Sixty cases of malaria falciparum were included in this study as patients.Thirty healthy individuals of comparable age,racial and body mass index were taken as controls.All patients were diagnosed by clinical picture and the presence of malaria parasites in blood film.Estimation of liver function test,kidney function test,complete blood count,fasting blood sugar,fasting serum insulin,pro-inflammatory cytokine tumor necrosis factor alpha(TNFα)and interleukin 1(IL1),estimation of morning serum leptin and calculation of body mass index(kg/m^2)were done in both groups on the day of admission,on discharge and 7 d after discharge.Results:At admission,leptin levels were significantly higher in patients group than in control while lasting serum insulin levels were not significantly different between the two groups.There were significant increases as regard to TNFαand IL1 in malaria patients.Significant differences were observed between the control and the patient group for leptin,TNFαand IL1 at the time of admission and discharge.After discharge for 7 d.a significant decline in scrum leptin levels,TNFαand IL1 in the patients group was observed as compared with time of admission and time of discharge,a positive correlation between serum leptin levels and TNFαand IL1.Conclusions:Leptin hormone level might play an important role in development and outcome of malaria infection.展开更多
Objective To explore the roles of cytokines in the pathogenesis of hemorrhagic fever with renal syndrome(HFRS). Methods Double-antibody sandwich ELISA was used to determine serum interleukin (IL)-6, urine tumor necros...Objective To explore the roles of cytokines in the pathogenesis of hemorrhagic fever with renal syndrome(HFRS). Methods Double-antibody sandwich ELISA was used to determine serum interleukin (IL)-6, urine tumor necrosis factor (TNF), IL-6 and IL-8 levels in 56 patients with HFRS. Results Serum IL-6, urine TNF, IL-6 and IL-8 concentrations in HFRS patients were significantly higher than those in control group, respectively (P<0.001). The concentrations increased at fever stage, then continued to increase during hypotension stage and peaked at oliguria stage. The concentrations of serum IL-6, urine TNF, IL-6 and IL-8 increased in accord with the severity of the disease and differed greatly among different types of the disease. Serum IL-6 had remarkable relationships with serum specific antibodies. It was positively related to serum β_2-microglobulin (β_2-MG), blood ureanitrogen (BUN) and creatinine (Cr). Significant positive relationships were also found both between urine IL-6 and TNF, and between IL-6 and IL-8 (r=0.5768, P<0.05; r=0.3760, P<0.01). Conclusion TNF, IL-6 and IL-8 activated during the course of the disease. IL-6 is associated with the immunopathological lesions caused by the hyperfunction of humoral immune response. IL-6, IL-8 and TNF are involved in the renal immune impairment. Determining them might, in certain extent, be used in predicting the prognosis and outcome of patients with HFRS.展开更多
The effects of tumor necrosis factor-α(TNF) on protein metabolism and cell-cycle kinetics were investigated in malignant tumor. Sprague-Dawley rats, subcutaneously inoculated with Walker 256 carcinosarcoma,were injec...The effects of tumor necrosis factor-α(TNF) on protein metabolism and cell-cycle kinetics were investigated in malignant tumor. Sprague-Dawley rats, subcutaneously inoculated with Walker 256 carcinosarcoma,were injected intraperitoneally with recombinant human TNF at a dose of 4-75×106 U/kg for 3 consecutive days.Tumor protein metabolism and cell-cycle kinetics were analyzed. The results showed a significant decrease in tumor volume and weight in comparison with control.TNF resulted in significant decrease in tumor Protein fractional synthesis rate, Protein synthesis and fractional growth rate, but no change of tumor protein fractional degradation rate. TNF also resulted in remarkable decline in labelling index and GI phase increase of tumor cells, 6 hours after bromodeoxyuridine injection, by cytometry. The results indicated that TNF inhibits tumor growth as a result of decreases in tumor cell DNA and protein syntheses.展开更多
The in vivo effects of Phytolacca acinosa poly-saccharides I (PEP-I) on immunologic cytotoxicity of mouse peritoneal macrophages and its production of tumor necrosis factor (TNF) and interleukin 1 (IL-1) were studied....The in vivo effects of Phytolacca acinosa poly-saccharides I (PEP-I) on immunologic cytotoxicity of mouse peritoneal macrophages and its production of tumor necrosis factor (TNF) and interleukin 1 (IL-1) were studied. PEP-I 80 or 160 mg kg was given ip twice every 4 day. Both doses were found to have significant enhancing activity on macrophages cytotoxicity against S180 sarcoma cells and malignant transformed fibroblast L929 cells. Peritoneal activated macrophages were incubated with LPS for 2 and 24 hrs to induce TNF and IL-1, respectively. The TNF and IL-1 activities were tested from cytotoxicity against L929 cells in an absorbence assay of enzymatic reaction and proliferation of thymocytes co-stimulated assay separately. The optimal time for TNF production was found on day 8. Significant increases in TNF and IL-1 were observed. In comparison of the effect of PEP-I on TNF with that of known priming agent BCG, there was no difference between them, but PEP-I had a high effect on IL-1. These results suggest that cytotoxicity of macrophages primed by PEP-I is closely related to its TNF and IL-1 production.展开更多
Aim: To study the roles of tumor necrosis factor alpha (TNF-α) on the sperm acrosin activity and acrosome reaction. Methods: The sperm acrosin activity was tested by the method of BAEE/ ADH Unity and the acrosome rea...Aim: To study the roles of tumor necrosis factor alpha (TNF-α) on the sperm acrosin activity and acrosome reaction. Methods: The sperm acrosin activity was tested by the method of BAEE/ ADH Unity and the acrosome reaction by the Triple-stain technique. Results: TNF-α decreased the sperm acrosin activity and acrosome reaction (P<0.01; P<0.01, respectively); it also inhibited the Ca2+-ATPase activity and SOD activity in sperm (P< 0.05; P<0.001, respectively), but increased the NOS activity and the amount of NO in sperm (P<0.001; P<0.001, respectively). While it had a less significant effect on the activity of Na+-K+-ATPase (P>0.05). Conclusion: TNF-α inhibits the sperm acrosin activity and acrosome reaction.展开更多
Objective To evaluate the effect of lamivudine on immunity of chronic hepatitis B by observing the sequential changes of serum TNF-α and HBV-DNA level. Methods 31 CHB patients with elevated serum ALT/AST level and HB...Objective To evaluate the effect of lamivudine on immunity of chronic hepatitis B by observing the sequential changes of serum TNF-α and HBV-DNA level. Methods 31 CHB patients with elevated serum ALT/AST level and HBVDNA level higher than 106 copies/mL were treated with lamivudine (100mg/day) for one year. The sequential serum samples, which were taken at the 0, 3 rd, 6 th, 12 th month after initiation of therapy, were used to detect serum level of TNF-α and quantity of HBV-DNA respectively. Results ① The serum TNF-α levels were higher than normal value before treatment in all patients; ② At In the 3 rd month of treatment, The the serum HBV-DNA level began to decline and became negative in the 54.9% of all patients. At the end of treatment, HBV-DNA was negative in 48.4% of all patients; ③ The decrease of TNF-α level was later than HBVDNA level drop. TNF-α level began to decline after 6 months treatment. At the end of treatment, TNF-α level was lower than that at in 6 th month, TNF-α level returned to normal in the 38.7% of all patients; ④ The TNF-α level decreased significantly after 6 months treatment in the patients with ALT>80IU/L at the beginning of treatment. But in the patients with ALT≤80IU/L, the TNF-α level decreased just after 12 months treatment; ⑤ TNF-α level fell obviously and early in patients whose HBVDNA became negative at in the 3 rd month. Conclusion Lamivudine can suppress the replication of HBVDNA quickly, and decrease TNF-α level in the serum TNF-α level. It suggests that lamivudine can modulate immune response directly or indirectly. The changes of serum TNF-α level may be used to evaluate the clinical efficacy of lamivudine.展开更多
目的:探讨子痫前期(PE)患者血清和胎盘中的肿瘤坏死因子-α(TNF-α)、基质金属蛋白酶-1(MMP-1)、基质金属蛋白酶-7(MMP-7)的表达水平。方法:选取2021年11月—2023年8月扬州大学临床医学院妇产科收治的86例PE患者,分为早发型PE(n=33)和...目的:探讨子痫前期(PE)患者血清和胎盘中的肿瘤坏死因子-α(TNF-α)、基质金属蛋白酶-1(MMP-1)、基质金属蛋白酶-7(MMP-7)的表达水平。方法:选取2021年11月—2023年8月扬州大学临床医学院妇产科收治的86例PE患者,分为早发型PE(n=33)和晚发型PE(n=53),另外选取健康孕妇(n=45)作为对照。检测所有纳入患者血清及胎盘组织中的TNF-α、MMP-1和MMP-7水平。结果:早发型PE患者(34.71±1.35周vs 40.43±0.70周)及晚发型PE患者(38.43±0.60周vs 40.43±0.70周)的孕周明显小于对照组(均P<0.05);早发型PE患者血清中TNF-α(507.92±28.99 ng/L vs 478.50±41.15 ng/L)、MMP-1(1156.67±158.07μg/L vs 1037.59±163.10μg/L)和MMP-7(211.00±18.64μg/L vs 196.32±19.87μg/L)的表达较晚发型PE患者显著增加(均P<0.05),晚发型PE患者血清中TNF-α(478.50±41.15 ng/L vs 446.90±41.52 ng/L)、MMP-1(1037.59±163.10μg/L vs 840.78±174.43μg/L)和MMP-7(196.32±19.87μg/L vs 166.01±15.09μg/L)的表达较对照组显著增加(均P<0.05);免疫组化结果显示,早发型PE患者胎盘组织中TNF-α、MMP-1和MMP-7表达水平较晚发型PE及对照组明显升高(均P<0.05)。结论:早发型PE患者及晚发型PE患者的TNF-α、MMP-1和MMP-7表达明显增加,这可能在PE的发生发展中起到重要作用。展开更多
AIM: To characterize tumor necrosis factor receptor-associated protein 1 (TRAP1) expression in the progression of ulcerative colitis (UC)-associated colorectal cancer.
文摘AIM:To detect the expression of tumor necrosis factor-a(TNF-a)in colorectal cancer(CRC)cells among Saudi patients,and correlate its expression with clinical stages of cancer.METHODS:Archival tissue specimens were collected from 30 patients with CRC who had undergone surgical intervention at King Khalid University Hospital.Patient demographic information,including age and gender,tumor sites,and histological type of CRC,was recorded.To measure TNF-a m RNA expression in CRC,total RNA was extracted from tumor formalin-fixed,paraffinembedded,and adjacent normal tissues.Reverse transcription and reverse transcription polymerase chain reaction were performed.Colorectal tissue microarrays were constructed to investigate the protein expression of TNF-a by immunohistochemistry.RESULTS:The relative expression of TNF-a m RNA in colorectal cancer was significantly higher than that seen in adjacent normal colorectal tissue.High TNF-a gene expression was associated with StageⅢandⅣneoplasms when compared with earlier tumor stages(P=0.004).Eighty-three percent of patients(25/30)showed strong TNF-a positive staining,while only 10%(n=3/30)of patients showed weak staining,and 7%(n=2/30)were negative.We showed the presence of elevated TNF-a gene expression in cancer cells,which strongly correlated with advanced stages of tumor.CONCLUSION:High levels of TNF-a expression could be an independent diagnostic indicator of colorectal cancer,and targeting TNF-a might be a promising prognostic tool by assessment of the clinical stages of CRC.
文摘Tumor necrosis factor inhibitors(anti-TNFs)are widely used therapies for the treatment of inflammatory bowel diseases(IBD);however,their administration is not risk-free.Heart failure(HF),although rare,is a potential adverse event related to administration of these medications.However,the exact mechanism of development of HF remains obscure.TNFαis found in both healthy and damaged hearts.Its effects are concentration-and receptor-dependent,promoting either cardio-protection or cardiomyocyte apoptosis.Experimental rat models with TNFαreceptor knockout showed increased survival rates,less reactive oxygen species formation,and improved diastolic left ventricle pressure.However,clinical trials employing anti-TNF therapy to treat HF had disappointing results,suggesting abolishment of the cardioprotective properties of TNFα,making cardiomyocytes susceptible to apoptosis and oxidation.Thus,patients with IBD who have risk factors should be screened for HF before initiating anti-TNF therapy.This review aims to discuss adverse events associated with the administration of anti-TNF therapy,with a focus on HF,and propose some approaches to avoid cardiac adverse events in patients with IBD.
基金This work was supported by the China Postdoctoral Science Foundation under grant No.2004035588.
文摘Tumor necrosis factor α （TNF-α） and interferon-γ （IFN-γ） are cytokines with strong antitumor activities. They were reacted with a photoactive arylazide-4-azidobenzoic acid, resulting in photoactive TNF-α and IFN-γ. The infrared （IR） spectra of these products showed the characteristic absorption of an azido group at 2127 cm^-1. By photo-immobilization, this modified TNF-α and IFN-γ were immobilized on polystyrene membranes for cell culture to prepare biomaterials. The micro-morphology of photoactive cytokines was observed with a scanning electron microscope （SEM）. The inhibitory effect on growth of Hela cells and inducing apoptosis activity of these two cytokines were analyzed by growth curve, transmission electron microscope （TEM） and fluorescence active cell sorter （FACS）. The results showed that co-immobilization of IFN-γ and TNF-α had significant inhibitory effect on growth of Hela cells, inhibitory rate up to 82%, and IFN-γ had obviously synergistic action.
基金Supported by Grant-in-Aid for Research from the Third-Term Comprehensive Control Research for Cancer Center of the Ministry of Health, Labor and Welfare, JapanGrant from the Ministry of Education, Culture, Sports, Science and Technology, Japan(KIBAN-B)the "Collaborative Development of Innovative Seeds" Grant Program from the Japan Science and Technology Agency
文摘AIM: To determine the expression statuses of tumor necrosis factor (TNF)-α, its receptors (TNF-R) and downstream effector molecules in human colorectal adenomas. METHODS: We measured the serum concentrations of TNF-α and its receptors in 62 colorectal adenoma patients and 34 healthy controls. The protein expression of TNF-α, TNF-R1, TNF-R2 and downstream signals of the TNF receptors, such as c-Jun N-terminal kinase (JNK), nuclear factor-κ B and caspase-3, were also investigated in human colorectal adenomas and in normal colorectal mucosal tissues by immunohistochemistry. Immunofluorescence confocal microscopy was used to investigate the consistency of expression of TNF-R1 and phospho-JNK (p-JNK). RESULTS: The serum levels of soluble TNF-R1 (sTNF-R1) in adenoma patients were significantly higher than in the control group (3.67 ± 0.86 ng/mL vs 1.57 ± 0.72 ng/mL, P < 0.001). Receiver operating characteristic analysis revealed the high diagnostic sensitivity of TNF-R1 measurements (AUC was 0.928) for the diagnosis of adenoma, and the best cut-off level of TNF-R1 was 2.08 ng/mL, with a sensitivity of 93.4% and a specificity of 82.4%. There were no significant differences in the serum levels of TNF-α or sTNF-R2 between the two groups. Immunohistochemistry showed high levels of TNF-R1 and p-JNK expression in the epithelial cells of adenomas. Furthermore, a high incidence of co-localization of TNF-R1 and p-JNK was identified in adenoma tissue. CONCLUSION: TNF-R1 may be a promising biomarker of colorectal adenoma, and it may also play an important role in the very early stages of colorectal carcinogenesis.
基金Supported by the National High Technology Research and Development Program of China(863 Program)(No.31101891)the Hitech Research and Development Program of China(No.2012AA10A408)
文摘As an aquatic fish,the spotted halibut Verasper variegatus is highly susceptible to bacterial and virus infections.Tumor necrosis factor-alpha(TNF-α)as a cytokine could control the inflammatory responses.The functions of TNF-αin many species have been widely studied,particularly in mammals.However,little is known about the TNF-αfunctions in V.variegatus.We first cloned and sequenced the TNF-αgene in V.variegatus(VvTNF-α).The two conserved cysteine residues,transmembrane sequence,Thr-Leu motif,and TNF family signature,as well as the TA-rich motifs of its proteins related to inflammatory responses had high similarity to those of the other teleost and mammalian TNF-α.The phylogenetic analysis showed that VvTNF-αwas consistent with TNF-αgenes of other vertebrates.The VvTNF-αtranscripts were extensively distributed in the peripheral blood leukocytes(PBLs),spleen,and gill,indicating that the VvTNF-αhad a role in immune function.Furthermore,treatment with pathogen-associated molecular patterns(PAMPs)could induce a rapid and significant increase of VvTNF-αin the PBLs,which reveals that VvTNF-αdoes participate in the host immune responses against bacterial and viral pathogens.We found that VvTNF-αhad an interesting expression pattern during metamorphosis,showing that the flatfish TNF-αmay have some novel functions during specific developmental stages.In addition,the 3 D structure prediction of VvTNF-αprovided an indication of how it is likely to interact with other proteins.Therefore,VvTNF-αhas multiple functions,and provides valuable information to explore novel functions of TNF-α.
基金supported by College of Health Sciences(Grant No,HS-10-01)
文摘Objective:To analyze scrum leptin levels in patients with malaria falciparum and compare them with healthy controls and correlate with development and outcome of malaria infection.Methods:Sixty cases of malaria falciparum were included in this study as patients.Thirty healthy individuals of comparable age,racial and body mass index were taken as controls.All patients were diagnosed by clinical picture and the presence of malaria parasites in blood film.Estimation of liver function test,kidney function test,complete blood count,fasting blood sugar,fasting serum insulin,pro-inflammatory cytokine tumor necrosis factor alpha(TNFα)and interleukin 1(IL1),estimation of morning serum leptin and calculation of body mass index(kg/m^2)were done in both groups on the day of admission,on discharge and 7 d after discharge.Results:At admission,leptin levels were significantly higher in patients group than in control while lasting serum insulin levels were not significantly different between the two groups.There were significant increases as regard to TNFαand IL1 in malaria patients.Significant differences were observed between the control and the patient group for leptin,TNFαand IL1 at the time of admission and discharge.After discharge for 7 d.a significant decline in scrum leptin levels,TNFαand IL1 in the patients group was observed as compared with time of admission and time of discharge,a positive correlation between serum leptin levels and TNFαand IL1.Conclusions:Leptin hormone level might play an important role in development and outcome of malaria infection.
文摘Objective To explore the roles of cytokines in the pathogenesis of hemorrhagic fever with renal syndrome(HFRS). Methods Double-antibody sandwich ELISA was used to determine serum interleukin (IL)-6, urine tumor necrosis factor (TNF), IL-6 and IL-8 levels in 56 patients with HFRS. Results Serum IL-6, urine TNF, IL-6 and IL-8 concentrations in HFRS patients were significantly higher than those in control group, respectively (P<0.001). The concentrations increased at fever stage, then continued to increase during hypotension stage and peaked at oliguria stage. The concentrations of serum IL-6, urine TNF, IL-6 and IL-8 increased in accord with the severity of the disease and differed greatly among different types of the disease. Serum IL-6 had remarkable relationships with serum specific antibodies. It was positively related to serum β_2-microglobulin (β_2-MG), blood ureanitrogen (BUN) and creatinine (Cr). Significant positive relationships were also found both between urine IL-6 and TNF, and between IL-6 and IL-8 (r=0.5768, P<0.05; r=0.3760, P<0.01). Conclusion TNF, IL-6 and IL-8 activated during the course of the disease. IL-6 is associated with the immunopathological lesions caused by the hyperfunction of humoral immune response. IL-6, IL-8 and TNF are involved in the renal immune impairment. Determining them might, in certain extent, be used in predicting the prognosis and outcome of patients with HFRS.
文摘The effects of tumor necrosis factor-α(TNF) on protein metabolism and cell-cycle kinetics were investigated in malignant tumor. Sprague-Dawley rats, subcutaneously inoculated with Walker 256 carcinosarcoma,were injected intraperitoneally with recombinant human TNF at a dose of 4-75×106 U/kg for 3 consecutive days.Tumor protein metabolism and cell-cycle kinetics were analyzed. The results showed a significant decrease in tumor volume and weight in comparison with control.TNF resulted in significant decrease in tumor Protein fractional synthesis rate, Protein synthesis and fractional growth rate, but no change of tumor protein fractional degradation rate. TNF also resulted in remarkable decline in labelling index and GI phase increase of tumor cells, 6 hours after bromodeoxyuridine injection, by cytometry. The results indicated that TNF inhibits tumor growth as a result of decreases in tumor cell DNA and protein syntheses.
文摘The in vivo effects of Phytolacca acinosa poly-saccharides I (PEP-I) on immunologic cytotoxicity of mouse peritoneal macrophages and its production of tumor necrosis factor (TNF) and interleukin 1 (IL-1) were studied. PEP-I 80 or 160 mg kg was given ip twice every 4 day. Both doses were found to have significant enhancing activity on macrophages cytotoxicity against S180 sarcoma cells and malignant transformed fibroblast L929 cells. Peritoneal activated macrophages were incubated with LPS for 2 and 24 hrs to induce TNF and IL-1, respectively. The TNF and IL-1 activities were tested from cytotoxicity against L929 cells in an absorbence assay of enzymatic reaction and proliferation of thymocytes co-stimulated assay separately. The optimal time for TNF production was found on day 8. Significant increases in TNF and IL-1 were observed. In comparison of the effect of PEP-I on TNF with that of known priming agent BCG, there was no difference between them, but PEP-I had a high effect on IL-1. These results suggest that cytotoxicity of macrophages primed by PEP-I is closely related to its TNF and IL-1 production.
文摘Aim: To study the roles of tumor necrosis factor alpha (TNF-α) on the sperm acrosin activity and acrosome reaction. Methods: The sperm acrosin activity was tested by the method of BAEE/ ADH Unity and the acrosome reaction by the Triple-stain technique. Results: TNF-α decreased the sperm acrosin activity and acrosome reaction (P<0.01; P<0.01, respectively); it also inhibited the Ca2+-ATPase activity and SOD activity in sperm (P< 0.05; P<0.001, respectively), but increased the NOS activity and the amount of NO in sperm (P<0.001; P<0.001, respectively). While it had a less significant effect on the activity of Na+-K+-ATPase (P>0.05). Conclusion: TNF-α inhibits the sperm acrosin activity and acrosome reaction.
文摘Objective To evaluate the effect of lamivudine on immunity of chronic hepatitis B by observing the sequential changes of serum TNF-α and HBV-DNA level. Methods 31 CHB patients with elevated serum ALT/AST level and HBVDNA level higher than 106 copies/mL were treated with lamivudine (100mg/day) for one year. The sequential serum samples, which were taken at the 0, 3 rd, 6 th, 12 th month after initiation of therapy, were used to detect serum level of TNF-α and quantity of HBV-DNA respectively. Results ① The serum TNF-α levels were higher than normal value before treatment in all patients; ② At In the 3 rd month of treatment, The the serum HBV-DNA level began to decline and became negative in the 54.9% of all patients. At the end of treatment, HBV-DNA was negative in 48.4% of all patients; ③ The decrease of TNF-α level was later than HBVDNA level drop. TNF-α level began to decline after 6 months treatment. At the end of treatment, TNF-α level was lower than that at in 6 th month, TNF-α level returned to normal in the 38.7% of all patients; ④ The TNF-α level decreased significantly after 6 months treatment in the patients with ALT>80IU/L at the beginning of treatment. But in the patients with ALT≤80IU/L, the TNF-α level decreased just after 12 months treatment; ⑤ TNF-α level fell obviously and early in patients whose HBVDNA became negative at in the 3 rd month. Conclusion Lamivudine can suppress the replication of HBVDNA quickly, and decrease TNF-α level in the serum TNF-α level. It suggests that lamivudine can modulate immune response directly or indirectly. The changes of serum TNF-α level may be used to evaluate the clinical efficacy of lamivudine.
文摘目的:探讨子痫前期(PE)患者血清和胎盘中的肿瘤坏死因子-α(TNF-α)、基质金属蛋白酶-1(MMP-1)、基质金属蛋白酶-7(MMP-7)的表达水平。方法:选取2021年11月—2023年8月扬州大学临床医学院妇产科收治的86例PE患者,分为早发型PE(n=33)和晚发型PE(n=53),另外选取健康孕妇(n=45)作为对照。检测所有纳入患者血清及胎盘组织中的TNF-α、MMP-1和MMP-7水平。结果:早发型PE患者(34.71±1.35周vs 40.43±0.70周)及晚发型PE患者(38.43±0.60周vs 40.43±0.70周)的孕周明显小于对照组(均P<0.05);早发型PE患者血清中TNF-α(507.92±28.99 ng/L vs 478.50±41.15 ng/L)、MMP-1(1156.67±158.07μg/L vs 1037.59±163.10μg/L)和MMP-7(211.00±18.64μg/L vs 196.32±19.87μg/L)的表达较晚发型PE患者显著增加(均P<0.05),晚发型PE患者血清中TNF-α(478.50±41.15 ng/L vs 446.90±41.52 ng/L)、MMP-1(1037.59±163.10μg/L vs 840.78±174.43μg/L)和MMP-7(196.32±19.87μg/L vs 166.01±15.09μg/L)的表达较对照组显著增加(均P<0.05);免疫组化结果显示,早发型PE患者胎盘组织中TNF-α、MMP-1和MMP-7表达水平较晚发型PE及对照组明显升高(均P<0.05)。结论:早发型PE患者及晚发型PE患者的TNF-α、MMP-1和MMP-7表达明显增加,这可能在PE的发生发展中起到重要作用。
基金Supported by Grants from National Institutes of Health,No.R21CA164548from Crohn’s and Colitis Foundation of America
文摘AIM: To characterize tumor necrosis factor receptor-associated protein 1 (TRAP1) expression in the progression of ulcerative colitis (UC)-associated colorectal cancer.
