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BACKGROUND:Stem cel transplantation is a promising treatment of advanced liver disease, and adipose-derived mesenchymal stem cel s have become another kind of popular cel s fol owing bone marrow mesenchymal stem cel s. OBJECTIVE:To investigate the influence of adipose-derived mesenchymal stem cel transplantation on blood biochemical indices of liver cirrhosis rats. METHODS:Sixty rats were equal y randomized into normal control, model and cel transplantation groups. Model rats of liver cirrhosis were made in the latter two groups through intragastric administration of carbon tetrachloride. One week after successful modeling, rats were given intraperitoneal injection of adipose-derived mesenchymal stem cel suspension in the cel transplantation group, and given normal saline in the other two groups. RESULTS AND CONCLUSION:Compared with the normal control group, the model group showed a significant increase in the levels of alanine aminotransferase, aspartate aminotransferase, total bilirubin, total protein in liver tissues, serum level of malondialdehyde, 15-minute indocyanine green retention rate and degree of hepatic fibrosis, and a significant decrease in serum albumin level, serum albumin/globulin, levels of glutathione peroxidase and cyclic guanosine monophosphate in liver tissues. On the contrary, these indicators were al improved in the cel transplantation group compared with the model group. Moreover, CM-Dil-positive cel s were visible in the liver tissue of rats undergoing adipose-derived mesenchymal stem cel transplantation. Al these findings indicate that adipose-derived mesenchymal stem cel transplantation can reduce liver cirrhosis in rats by acting on blood biochemistry levels.
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BACKGROUND:Stem cel transplantation, in recent years, has become a preferred treatment for premature ovarian failure. Umbilical cord blood mononuclear cel s containing a large number of mesenchymal stem cel s, immature stem/progenitor cel s, and endothelial progenitor cel s can be used as an important source of stem cel transplantation. OBJECTIVE:To study the therapeutic efficacy of human umbilical cord blood mononuclear cel transplantation on radioactive premature ovarian failure in nude mice. METHODS:120 female BALB/C nude mice were randomly divided into four groups:blank control group without any intervention;model group, intravenous transplantation group, and in situ transplantation group exposed to 60Coγrays, 0.5 Gry per day, for 30 days. After 30 days, premature ovarian failure models were made in the latter three groups. Then, nude mice in the latter three groups were given bilateral ovary injection of 10 μL DMEM, tail vein injection of 10 μL human umbilical cord blood mononuclear cel s (1×1013/L), and bilateral ovary injection of 10 μL human umbilical cord blood mononuclear cel s (1×1013/L), respectively. Thirty days after cel transplantation, serum levels of estradiol, fol icle hormone, luteinizing hormone, inhibin B and vascular endothelial growth factor were detected, cel apoptosis in the ovary tissue and cel survival were observed pathological y. RESULTS AND CONCLUSION:After modeling, the serum levels of estradiol, inhibin B and vascular endothelial growth factor were significantly reduced (P<0.01), while fol icle hormone and luteinizing hormone levels increased (P<0.01). After transplantation, these indexes were al improved in the in situ transplantation group (P<0.01), and reduced fol icle hormone and luteinizing hormone levels were visible in the intravenous transplantation group (P<0.05, P<0.01). Compared with the model group, in situ transplantation and intravenous injection of human umbilical cord blood mononuclear cel s could effectively reduce cel apoptosis in the ovary tissue (P<0.05), and transplanted cel s were able to survive in the ovary of nude mice. Al these findings show human umbilical cord blood mononuclear cel transplantation do have curative effects on premature ovarian failure in nude mice through the inhibition of apoptosis and the regulation of hormone secretion.
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Objective To evaluate the efficacy and adverse reaction of three-dimensional conformal radiation therapy (3D-CRT) combined with chemotherapy of paclitaxel in treatment of brain metastases from breast cancer in the elderly.Methods The 50 patients were randomly divided into observation group (n=26,radiation combined with chemotherapy) and control group (n= 24,simple radiation).In the early stage,both groups received common two-dimesional conformal radiation therapy.The total dose (DT) of whole brain irradiation was 30-40 Gy.In the later stage,the reduced field for the local lesion of brain metastases would be altered to 3D-CRT for the post period with 2 Gy 5 times a week.DT was added from 10-24 Gy up to total DT of 50-64 Gy.The patients were given paclitaxel 65-85 mg/m2 by intravenous drip at 1st and 8th day with synchronization of 2-4 weeks,having paclitaxel chemotherapy of 2-4 circle,28 days a circle.After 2 month treatment,the efficacy and adverse effects of the two groups were observed.follow up for 2 years,the long-term efficacy and survival rate were evaluated.Results The effective rate was 76.9% in observation group and 45.8% in control group,respectively (x2 =5.120,P＜0.05) and the KPS score was 80.8% and 54.2%,respectively.The quality of life was improved in observation group versus control group (x2 =4.059,P＜0.05).Compared with control group,hypoleukemia was significant in observation group (P＜0.05).The complications such as nausea and vomiting,hepatic dysfunction were more in observation group than in control group,but there was no statistical significance between two groups.There was statistic ally significant difference in 2-year survival rate between two groups (x2= 4.7260,P＜0.05).Conclusions The 3D-CRT combined with paclitaxel chemotherapy is a prefered choice for locally advanced brain metastases from breast cancer.More side effects and adverse reaction are observed in observation group.However,all the patients could tolerate them.It is worthy of popularization and application.
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Objective To evaluate the association of COX2 genetic variants with the risk of esophageal cancer and the interaction of COX2 genetic variants with Hp infection. Methods A total of 119 patients with esophageal cancer and 238 frequency-matched controls were genotyped by polymerase chain reaction-restriction fragment length polymorphism method. Odds ratios (OR) and 95% confidence intervals ( CI) were estimated by logistic regression. Results Case-control analysis showed an increased risk of developing esophageal cancer for 1195 GA(OR =2.69,95% CI= 1. 46-5. 14) and 1195AA ( OR = 2. 30,95% CI = 1.23-4. 89) genotype carriers,respectively, compared with non 1195 GG carriers. When stratified by Hp status, the significantly increased risk of esophageal cancer was found among Hp carrier with OR (95%CI) =2.74 (1.35-5.96) ,but not among Hp non-carriers. Conclusion Genetic polymorphism in COX2 promoter region may play an important role in esophageal cancer by Hp infection.
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<p><b>OBJECTIVE</b>To prepare and apply monoclonal antibodies (McAb) against recombinant human interferon alpha (rHu IFN-alpha).</p><p><b>METHODS</b>Five cell lines (2E9, 4G1, 2A7, 2C9, 4G10) secreting McAbs against rHu IFN-alpha were established by hybridoma technique.</p><p><b>RESULTS</b>All the cell lines secreted monoclonal antibodies stably. Functions of secreting antibodies of the five cell lines lasted for 6 months in BALB/c mice and 8 months in cell culture. The specificity of antibody was constant. The Ig subclasses of the McAbs were IgG1. Anti-IFN McAb affinity purification column was prepared by coupling the anti IFN-alpha McAb to Sepharose 4B. The combining rate reached was higher than 95%.</p><p><b>CONCLUSIONS</b>The highest purification efficiency was obtained by using 4G10 column.</p>
Subject(s)
Animals , Male , Mice , Antibodies, Monoclonal , Antibody Affinity , Antibody Specificity , Cross Reactions , Enzyme-Linked Immunosorbent Assay , Hybridomas , Bodily Secretions , Interferon Type I , Allergy and Immunology , Mice, Inbred BALB C , Recombinant ProteinsABSTRACT
Objective To study the change of activity and toxicity of superoxide (O - 2 ) produced in polymorphonuclear leukocytes(PMNLs) during ischemia reperfusion cerebral injury.Methods The rats were administrated by both PMA (an activator of single transduction of O - 2 produced in alkaline phosphatase(ALPase) positive granules of PMNLs) and the inhibitor BCA respectively; the model of middle cerebral artery (MCA) occlusion was made by suture cleat mothod,the activity changes of both myeloperoxidease (MPO) and O - 2 were measured at 6, 12, 24, 48, 72 and 168h reperfusion following ischemia 1h, and the pathological ultrastructural changes were observed. Results The MPO activity of both PAM group and BCA group reached the peaks at 24h after reperfusion; however,there were no remarkable differences in MPO activity between these two groups in the same time point. The O - 2 activity in the PAM group was significantly higher than those in the BCA group. The O - 2 activity reached the peak at 72h of ischemia reperfusion. In the same experimental time point, the pathological changes of the ultrastructure in ischemic reperfusive injury brain of the PAM group were much more serious than the those of the BCA group, which showed obviously the neurons edema, the abnormal structures of nerve felt and synapse in the ischemia reperfusion injured brain.Conclusion The increase of brain O - 2 activity from PMNLs during cerebral ischemia reperfusion injury was direct ratio to the degree of cerebral injury. BCA might depress the activity and the toxicity of the O - 2.