检索结果-南通市图书馆

Peroxisome proliferator activated receptor-γ and the ubiquitin-proteasome system in colorectal cancer

World Journal of Gastrointestinal Oncology 2010年第5期2卷 235-241页

作者： Ioannis A Voutsadakis Department of Medical Oncology University Hospital of Larissa

Peroxisome proliferator activated receptor-γ (PPARγ), a transcription factor of the nuclear receptor superfamily plays a significant role in colorectal cancer pathogenesis. In most experimental systems PPARγ activation has tumor suppressing effects in the colon. PPARγ is regulated at multiple levels by the ubiquitin-proteasome system (UPS). At a first level, UPS regulates PPARγ transcription. This regulation involves both PPARγ transcription specific factors and the general transcription machinery. At a second level UPS regulates PPARγ and its co-factors themselves, as PPARγ and many co-factors are proteasome substrates. At a third level of regulation, transduction pathways working in parallel but also having interrelations with PPARγ are regulated by the UPS, creating a network of regulation in the colorectal carcinogenesisrelated pathways that are under UPS control. Activation of PPARγ transcription by direct pharmacologic activators and by stabilization of its molecule by proteasome inhibitors could be strategies to be exploited in colorectal cancer treatment.

关键词： Peroxisome proliferator activated receptor-γ Ubiquitin Proteasome Colorectal cancer Carcinogenesis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Role of adipokines and peroxisome proliferator-activated receptors in nonalcoholic fatty liver disease

引用

World Journal of Hepatology 2014年第8期6卷 570-579页

作者： Vettickattuparambil George Giby Thekkuttuparambil Ananthanarayanan Ajith Department of Biochemistry Amala Institute of Medical Sciences Thrissur-680 555 Kerala India

Intrahepatic fat deposition has been demonstrated in patients with nonalcoholic fatty liver disease(NAFLD). Genetic and environmental factors are important for the development of NAFLD. Diseases such as obesity, diabetes, and hypertension have been found to be closely associated with the incidence of NAFLD. Evi-dence suggests that obesity and insulin resistance are the major factors that contribute to the development of NAFLD. In comparing the factors that contribute to the buildup of excess calories in obesity, an imbalance of energy homeostasis can be considered as the basis. Among the peripheral signals that are generated to regulate the uptake of food, signals from adipose tissue are of major relevance and involve the maintenance of energy homeostasis through processes such as lipo-genesis, lipolysis, and oxidation of fatty acids. Advances in research on adipose tissue suggest an integral role played by adipokines in NAFLD. Cytokines secreted by adipocytes, such as tumor necrosis factor-α, transform-ing growth factor-β, and interleukin-6, are implicated in NAFLD. Other adipokines, such as leptin and adiponectin and, to a lesser extent, resistin and retinol binding protein-4 are also involved. Leptin and adiponectin can augment the oxidation of fatty acid in liver by activating the nuclear receptor super-family of transcription fac-tors, namely peroxisome proliferator-activated receptor(PPAR)-α. Recent studies have proposed downregula-tion of PPAR-α in cases of hepatic steatosis. This re-view discusses the role of adipokines and PPARs with regard to hepatic energy metabolism and progression of NAFLD.

关键词： Nonalcoholic fatty liver disease Adipose tissue Energy homeostasis Peroxisome proliferator activated receptors Adipokines

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PPAR -γ激动剂对 LPS 诱导的小鼠 ARDS 肺泡上皮钠通道-γ亚基的调控

引用

中国急救医学 2014年第8期34卷 729-733,I0001页

作者：叶媛何婧戚迪冯龙华王导新重庆医科大学附属第二医院呼吸内科重庆400010

目的：探讨过氧化物酶增殖体活化受体-γ（ PPAR-γ）激动剂对LPS诱导的小鼠ARDS的保护作用及其对肺泡上皮细胞钠通道-γ亚基（ ENaC-γ）的调控作用。方法40只雄性BALB/C小鼠随机分为对照组（ Control组）、模型组（ LPS组）、罗格列... 详细信息

目的：探讨过氧化物酶增殖体活化受体-γ（ PPAR-γ）激动剂对LPS诱导的小鼠ARDS的保护作用及其对肺泡上皮细胞钠通道-γ亚基（ ENaC-γ）的调控作用。方法40只雄性BALB/C小鼠随机分为对照组（ Control组）、模型组（ LPS组）、罗格列酮治疗组（ RGZ组，LPS＋罗格列酮）及GW9662干预组（ GW9662组，LPS＋GW9662＋罗格列酮），每组10只。处理后收集相关标本，ELISA测定肺泡灌洗液（ BALF）中IL-1β和TNF-α水平。肺组织湿/干比（ W/D）测定肺水肿程度。 HE染色观察肺组织病理变化并进行肺组织损伤评分。用免疫组织化学法和Western blot测定肺组织ENaC-γ蛋白的表达。 RT-PCR测定ENaC-γmRNA的表达。结果与Control组比较，LPS组、RGZ组和GW9662组中IL-1β和TNF-α水平、W/D值、HE染色肺组织损伤程度及评分明显升高（ P＜0．05）；与LPS组比较，RGZ组各指标水平及肺损伤评分明显下降（P＜0．05），但LPS组和GW9662组比较差异无统计学意义（P＞0．05）。 LPS造模后，LPS组（210±15IOD，0．18±0．02，0．22±0．04）、RGZ组（450±30IOD，0．43±0．03，0．45±0．03）、GW9662组（235±35IOD，0．21±0．03，0．25±0．02）肺组织ENaC-γ蛋白和mRNA的表达明显低于Control组（600±25IOD，0．64±0．01，0．67±0．02，P＜0．05），RGZ组与LPS组和GW9662比较差异有统计学意义（P＜0．05），但LPS组和GW9662组比较差异无统计学意义（P＞0．05）。结论 PPAR-γ受体激动剂可能从转录水平上调肺泡ENaC-γ的表达，从而减轻LPS诱导的小鼠ARDS肺水肿程度，发挥保护性作用。

关键词：过氧化物酶增殖体活化受体-γ(PPAR-γ) 罗格列酮急性呼吸窘迫综合征(ARDS) 上皮细胞钠通道(ENaC) Peroxisome proliferator activated receptor -γ(PPAR-γ) Acute respiratory distress syndrome (ARDS) Epithelial sodium channel (ENaC)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：