Objective: To detect the relations of c-erbB-2 onco-gene protein, epidermal growth factor receptor (EG-FR) and transforming growth factor-β1 (TGF-β1)to the progression or metastasis of pancreatic carci-noma.Methods:...Objective: To detect the relations of c-erbB-2 onco-gene protein, epidermal growth factor receptor (EG-FR) and transforming growth factor-β1 (TGF-β1)to the progression or metastasis of pancreatic carci-noma.Methods: Using streptavidinbiotin complex (SABC)method, c-erbB-2 oncongene protein, we examinedimmunohistochemically EGFR and TGF-β1 expres-sions in wax-tissue sections from 10 individuals withnormal pancreas (NP), 13 patients with chronic pan-creatitis (CP) and 36 patients with pancreatic ductaladenocarcinoma (PC).Results: The positive expression rates of c-cerbB-2oncogene protein, EGFR and TGF-β1 in the NP, CPand PC groups were 0, 0, 10%; 7.7%, 7.7%,7.7%; and 41.7%, 50.0%, 44.4%, respectively.The positive expression rates of the three specific pro-teins increased more significantly in the PC groupthan in the NP and CP groups (P【0.05). The indi-vidual expression of c-erbB-2, EGFR and TGF-β1was not related to the age and sex of the patients aswell as the site, size and histopathological grade oftumors (P】0.05), but to the clinical stage of tumors(P【0.01). The coexpression rate of the three pro-teins was 27.8 % (10/36). This coexpression in thePC group was correlated with the histopathologicalgrades and clinical stages of tumors (P【0.01).Conclusion: Detection of c-erbB-2 oncogene protein,EGFR, and TGF-β1 expressions in pancreatic tissueis helpful to judge the malignancy, progression, andmetastasis of PC.展开更多
There are various hormones and growth factors which may modify the intestinal absorption of nutrients,and which might thereby be useful in a therapeutic setting,such as in persons with short bowel syndrome.In partⅠ,w...There are various hormones and growth factors which may modify the intestinal absorption of nutrients,and which might thereby be useful in a therapeutic setting,such as in persons with short bowel syndrome.In partⅠ,we focus first on insulin-like growth factors,epidermal and transferring growth factors,thyroid hormones and glucocorticosteroids.PartⅡwill detail the effects of glucagon-like peptide(GLP)-2 on intestinal absorption and adaptation,and the potential for an additive effect of GLP2 plus steroids.展开更多
目的通过观察西罗莫司或环孢霉素A与CD4+CD25+调节性T细胞((regulatory T cell,Treg)体外共培养对CD4+CD25+Treg增殖情况及对Foxp3和转化生长因子-β(transforming growth factor-β,TGF-β)的表达的影响,探讨西罗莫司促进TGF-β分泌诱...目的通过观察西罗莫司或环孢霉素A与CD4+CD25+调节性T细胞((regulatory T cell,Treg)体外共培养对CD4+CD25+Treg增殖情况及对Foxp3和转化生长因子-β(transforming growth factor-β,TGF-β)的表达的影响,探讨西罗莫司促进TGF-β分泌诱导Treg体外分化和增殖的机制。方法无菌条件下取C57BL/6小鼠脾脏,分离单个核细胞,免疫磁珠分选获得CD4+CD25+Treg,设空白对照组、西罗莫司组、环孢霉素A组,共培养96h。上流式细胞仪检测CD4+CD25+Treg。反转录聚合酶链、酶联免疫吸附试验法检测西罗莫司或环孢霉素A处理后的CD4+CD25+Treg的FoxP3+、TGF-βmRNA表达水平和分泌情况;Western blot分析TGF-β信号通路重要的活化分子Smad蛋白的表达情况,观察其对CD4+CD25+FoxP3+Treg增殖的影响;使用TGF-β中和抗体进一步验证TGF-β在西罗莫司促进CD4+CD25+FoxP3+Treg分化增殖过程中的重要作用。结果与对照组相比,西罗莫司处理的CD4+T细胞分泌的TGF-β水平增加近2.5倍,差异有统计学意义(P<0.01);而环孢霉素A处理的CD4+T细胞分泌的TGF-β水平则有所下降,但与对照组比较,差异无统计学意义(P>0.05)。与对照组比较,环孢霉素A组CD4+CD25+Treg占CD4+T细胞比例明显降低,差异有统计学意义(41.25%vs.69.22%,P<0.01);西罗莫司组CD4+CD25+Treg占CD4+T细胞稍有下降,但差异无统计学意义(65.21%%vs.69.22%,P>0.05)。西罗莫司组FoxP3+T细胞的比例明显高于对照组,差异有统计学意义(53.7%vs.40.2%,P<0.05);而环孢霉素A组FoxP3+T细胞比例明显低于对照组,差异有统计学意义(23.6%vs.40.2%,P<0.01)。结论西罗莫司在体外培养促进CD4+CD25+Treg的增殖与生长,而环孢霉素A体外抑制CD4+CD25+Treg的增值与生长。西罗莫司通过诱导TGF-β表达分泌来促进CD4+CD25+FoxP3+Treg的增殖。展开更多
文摘Objective: To detect the relations of c-erbB-2 onco-gene protein, epidermal growth factor receptor (EG-FR) and transforming growth factor-β1 (TGF-β1)to the progression or metastasis of pancreatic carci-noma.Methods: Using streptavidinbiotin complex (SABC)method, c-erbB-2 oncongene protein, we examinedimmunohistochemically EGFR and TGF-β1 expres-sions in wax-tissue sections from 10 individuals withnormal pancreas (NP), 13 patients with chronic pan-creatitis (CP) and 36 patients with pancreatic ductaladenocarcinoma (PC).Results: The positive expression rates of c-cerbB-2oncogene protein, EGFR and TGF-β1 in the NP, CPand PC groups were 0, 0, 10%; 7.7%, 7.7%,7.7%; and 41.7%, 50.0%, 44.4%, respectively.The positive expression rates of the three specific pro-teins increased more significantly in the PC groupthan in the NP and CP groups (P【0.05). The indi-vidual expression of c-erbB-2, EGFR and TGF-β1was not related to the age and sex of the patients aswell as the site, size and histopathological grade oftumors (P】0.05), but to the clinical stage of tumors(P【0.01). The coexpression rate of the three pro-teins was 27.8 % (10/36). This coexpression in thePC group was correlated with the histopathologicalgrades and clinical stages of tumors (P【0.01).Conclusion: Detection of c-erbB-2 oncogene protein,EGFR, and TGF-β1 expressions in pancreatic tissueis helpful to judge the malignancy, progression, andmetastasis of PC.
文摘There are various hormones and growth factors which may modify the intestinal absorption of nutrients,and which might thereby be useful in a therapeutic setting,such as in persons with short bowel syndrome.In partⅠ,we focus first on insulin-like growth factors,epidermal and transferring growth factors,thyroid hormones and glucocorticosteroids.PartⅡwill detail the effects of glucagon-like peptide(GLP)-2 on intestinal absorption and adaptation,and the potential for an additive effect of GLP2 plus steroids.
