Objective:To observe the effects of puerarin on the expressions of leptin receptor mRNA and phosphorylated Janus kinase 2 / phosphorylated signal transducers and activators of transcription 3 (P-JAK2/P-STAT3) proteins...Objective:To observe the effects of puerarin on the expressions of leptin receptor mRNA and phosphorylated Janus kinase 2 / phosphorylated signal transducers and activators of transcription 3 (P-JAK2/P-STAT3) proteins in the liver of rats with non-alcoholic fatty liver (NAFLD). Methods: A rat model of NAFLD was successfully established by feeding high-fat diet. All SD rats were randomly divided into blank control group, untreated group, simvastatin-treated group and puerarin-treated group. After four-week treatment, the levels of hepatic triglyceride and total cholesterol were analyzed by using an automatic biochemical analyzer. The pathology of the liver tissue was observed by light microscopy. Serum leptin level was detected by enzyme-linked immunosorbent assay, and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins in the liver of NAFLD rats were quantified by reverse transcription polymerase chain reaction (RT-PCR) and Western blot analysis respectively. Results: Puerarin significantly decreased the levels of hepatic triglyceride and total cholesterol in NAFLD rats. Fat degeneration and inflammatory reaction in liver tissues of NAFLD rats were ameliorated after puerarin treatment. The serum leptin level was increased and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins were up-regulated in puerarin-treated group. Conclusion: Puerarin can effectively attenuate liver lipid disorder and inflammation by improving the leptin resistance and enhancing the expressions of leptin receptor mRNA and P-JAK2/P-STAT3展开更多
目的观察乳腺癌组织中信号传导与转录激活因子3(signal transducer and activator of transcription 3,STAT3)的表达,分析其与患者临床特征的关系。方法应用免疫组织化学法(EnV ision)检测23例乳腺癌患者癌组织中STAT3、白细胞介素-6(in...目的观察乳腺癌组织中信号传导与转录激活因子3(signal transducer and activator of transcription 3,STAT3)的表达,分析其与患者临床特征的关系。方法应用免疫组织化学法(EnV ision)检测23例乳腺癌患者癌组织中STAT3、白细胞介素-6(interleukin,IL-6)、人基质金属蛋白酶(matrix metalloproteinase,MMP)-2和MMP-9的表达情况,并分析其与患者临床病理特征的关系。结果浸润性癌组织中STAT3表达高于非浸润性癌。23例乳腺癌组织中IL-6表达阳性11例,阳性率47.83%;MMP-2阳性10例,阳性率43.48%;MMP-9阳性9例,阳性率39.13%;STAT3阳性表达与浸润型乳腺癌有统计学差异(χ~2=7.738,P<0.05),两者呈正相关(r=0.161,P<0.05);STAT3阳性表达与IL-6阳性表达无相关性(r=0.032,P>0.05),与MMP-9(r=0.537,P<0.05)和MMP-2(r=0.649,P<0.05)阳性表达呈正相关。结论 STAT3与乳腺癌的浸润侵袭有关,其可能是通过调节MMP-2和MMP-9的表达控制乳腺癌的侵袭和转移。展开更多
文摘Objective:To observe the effects of puerarin on the expressions of leptin receptor mRNA and phosphorylated Janus kinase 2 / phosphorylated signal transducers and activators of transcription 3 (P-JAK2/P-STAT3) proteins in the liver of rats with non-alcoholic fatty liver (NAFLD). Methods: A rat model of NAFLD was successfully established by feeding high-fat diet. All SD rats were randomly divided into blank control group, untreated group, simvastatin-treated group and puerarin-treated group. After four-week treatment, the levels of hepatic triglyceride and total cholesterol were analyzed by using an automatic biochemical analyzer. The pathology of the liver tissue was observed by light microscopy. Serum leptin level was detected by enzyme-linked immunosorbent assay, and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins in the liver of NAFLD rats were quantified by reverse transcription polymerase chain reaction (RT-PCR) and Western blot analysis respectively. Results: Puerarin significantly decreased the levels of hepatic triglyceride and total cholesterol in NAFLD rats. Fat degeneration and inflammatory reaction in liver tissues of NAFLD rats were ameliorated after puerarin treatment. The serum leptin level was increased and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins were up-regulated in puerarin-treated group. Conclusion: Puerarin can effectively attenuate liver lipid disorder and inflammation by improving the leptin resistance and enhancing the expressions of leptin receptor mRNA and P-JAK2/P-STAT3
文摘目的观察乳腺癌组织中信号传导与转录激活因子3(signal transducer and activator of transcription 3,STAT3)的表达,分析其与患者临床特征的关系。方法应用免疫组织化学法(EnV ision)检测23例乳腺癌患者癌组织中STAT3、白细胞介素-6(interleukin,IL-6)、人基质金属蛋白酶(matrix metalloproteinase,MMP)-2和MMP-9的表达情况,并分析其与患者临床病理特征的关系。结果浸润性癌组织中STAT3表达高于非浸润性癌。23例乳腺癌组织中IL-6表达阳性11例,阳性率47.83%;MMP-2阳性10例,阳性率43.48%;MMP-9阳性9例,阳性率39.13%;STAT3阳性表达与浸润型乳腺癌有统计学差异(χ~2=7.738,P<0.05),两者呈正相关(r=0.161,P<0.05);STAT3阳性表达与IL-6阳性表达无相关性(r=0.032,P>0.05),与MMP-9(r=0.537,P<0.05)和MMP-2(r=0.649,P<0.05)阳性表达呈正相关。结论 STAT3与乳腺癌的浸润侵袭有关,其可能是通过调节MMP-2和MMP-9的表达控制乳腺癌的侵袭和转移。