Background/Aims Somatostatin analogues inhibit cell proliferation by stimulation of distinct somatostatin receptor(SSTR) subtypes. In recent years, these compounds have been introduced into the therapy of advanced hep...Background/Aims Somatostatin analogues inhibit cell proliferation by stimulation of distinct somatostatin receptor(SSTR) subtypes. In recent years, these compounds have been introduced into the therapy of advanced hepatocellular carcinoma(HCC). The efficacy of this treatment is under debate due to the controversial results of clinical trials. Despite the widespread clinical use of somatostatin analogues in HCC,little is known about the expression of each of the five SSTRs in these tumors. Methods We analyzed the expression of SSTR subtypes in 56 HCCs by immunohistochemistry using subtype-specific antibodies. Six of the samples were also investigated by RT-PCR using subtype-specific oligonucleotide primers. Results HCCs display differential, individual expression patterns as well as variable expression levels for SSTRs. The overall expression rate of SSTR1, SSTR2,SSTR3, SSTR4, and SSTR5 is 46, 41, 64, 0, and 75% , respectively.No significant correlation was observed between SSTR expression and tumor stage, differentiation, histological tumor type, or underlying liver disease. Conclusions Individual patterns and levels of SSTR expression might determine the response to treatment with somatostatin analogues in HCC. Selective treatment of these tumors based on the analysis of SSTR subtype expression might lead to an increase in response rates.展开更多
目的:研究β3肾上腺素能受体激动剂CL316,243在体诱导小鼠各部位脂肪组织棕色化的时效性,明确其潜在的分子调控机制。方法:以10周龄C57BL/6J小鼠为研究对象,实验组分别腹腔注射CL316,243(1μg/g)1,3及5 d,对照组注射无菌生理盐水溶剂。...目的:研究β3肾上腺素能受体激动剂CL316,243在体诱导小鼠各部位脂肪组织棕色化的时效性,明确其潜在的分子调控机制。方法:以10周龄C57BL/6J小鼠为研究对象,实验组分别腹腔注射CL316,243(1μg/g)1,3及5 d,对照组注射无菌生理盐水溶剂。通过免疫组织化学法和基因表达分析等,观察不同作用时间下小鼠各部位脂肪组织的棕色化改变及产热相关基因及蛋白质的表达水平。结果:与对照组相比,在腹腔注射CL316,243第1天时附睾周围白色脂肪组织(epididymal white adipose tissue,eWAT)的重量就明显减轻,并且随着给药时间的延长,腹股沟皮下白色脂肪组织(inguinal subcutaneous white adipose tissue,sWAT)和eWAT中解偶联蛋白UCP-1 mRNA和蛋白质表达升高;而持续注射5 d能显著抑制小鼠的摄食及体重增加,并诱导小鼠肩胛部棕色脂肪(interscapular brown adipose tissue,iBAT)、sWAT及eWAT中细胞直径的缩小及小脂滴的聚集。结论:β3肾上腺素能受体激动剂CL316,243能在体诱导小鼠脂肪组织的棕色化,并且在不同脂肪组织中表现出不同的时效性特点。展开更多
目的:探讨P2Y1和P2Y4亚基在大鼠背根神经节(D R G)神经元的表达。方法:应用组织水平和多细胞水平R T-PC R方法从不同角度检测了P2Y1和P2Y4受体的表达情况。结果:两种R T-PC R扩增结果均显示:P2Y1亚型有特异性表达阳性条带出现,而P2Y4亚...目的:探讨P2Y1和P2Y4亚基在大鼠背根神经节(D R G)神经元的表达。方法:应用组织水平和多细胞水平R T-PC R方法从不同角度检测了P2Y1和P2Y4受体的表达情况。结果:两种R T-PC R扩增结果均显示:P2Y1亚型有特异性表达阳性条带出现,而P2Y4亚型则无特异性表达条带出现。结论:大鼠D R G的大、中、小细胞中均有P2Y1亚型表达,而无P2Y4亚型的表达。展开更多
文摘Background/Aims Somatostatin analogues inhibit cell proliferation by stimulation of distinct somatostatin receptor(SSTR) subtypes. In recent years, these compounds have been introduced into the therapy of advanced hepatocellular carcinoma(HCC). The efficacy of this treatment is under debate due to the controversial results of clinical trials. Despite the widespread clinical use of somatostatin analogues in HCC,little is known about the expression of each of the five SSTRs in these tumors. Methods We analyzed the expression of SSTR subtypes in 56 HCCs by immunohistochemistry using subtype-specific antibodies. Six of the samples were also investigated by RT-PCR using subtype-specific oligonucleotide primers. Results HCCs display differential, individual expression patterns as well as variable expression levels for SSTRs. The overall expression rate of SSTR1, SSTR2,SSTR3, SSTR4, and SSTR5 is 46, 41, 64, 0, and 75% , respectively.No significant correlation was observed between SSTR expression and tumor stage, differentiation, histological tumor type, or underlying liver disease. Conclusions Individual patterns and levels of SSTR expression might determine the response to treatment with somatostatin analogues in HCC. Selective treatment of these tumors based on the analysis of SSTR subtype expression might lead to an increase in response rates.
文摘目的:研究β3肾上腺素能受体激动剂CL316,243在体诱导小鼠各部位脂肪组织棕色化的时效性,明确其潜在的分子调控机制。方法:以10周龄C57BL/6J小鼠为研究对象,实验组分别腹腔注射CL316,243(1μg/g)1,3及5 d,对照组注射无菌生理盐水溶剂。通过免疫组织化学法和基因表达分析等,观察不同作用时间下小鼠各部位脂肪组织的棕色化改变及产热相关基因及蛋白质的表达水平。结果:与对照组相比,在腹腔注射CL316,243第1天时附睾周围白色脂肪组织(epididymal white adipose tissue,eWAT)的重量就明显减轻,并且随着给药时间的延长,腹股沟皮下白色脂肪组织(inguinal subcutaneous white adipose tissue,sWAT)和eWAT中解偶联蛋白UCP-1 mRNA和蛋白质表达升高;而持续注射5 d能显著抑制小鼠的摄食及体重增加,并诱导小鼠肩胛部棕色脂肪(interscapular brown adipose tissue,iBAT)、sWAT及eWAT中细胞直径的缩小及小脂滴的聚集。结论:β3肾上腺素能受体激动剂CL316,243能在体诱导小鼠脂肪组织的棕色化,并且在不同脂肪组织中表现出不同的时效性特点。
文摘目的:探讨P2Y1和P2Y4亚基在大鼠背根神经节(D R G)神经元的表达。方法:应用组织水平和多细胞水平R T-PC R方法从不同角度检测了P2Y1和P2Y4受体的表达情况。结果:两种R T-PC R扩增结果均显示:P2Y1亚型有特异性表达阳性条带出现,而P2Y4亚型则无特异性表达条带出现。结论:大鼠D R G的大、中、小细胞中均有P2Y1亚型表达,而无P2Y4亚型的表达。
