Cellular senescence is a signal transduction process which maintained genomic stability and stopped mammalian cell growth. Furthermore, cellular senescence induces a protective response to a variety of DNA damage. How...Cellular senescence is a signal transduction process which maintained genomic stability and stopped mammalian cell growth. Furthermore, cellular senescence induces a protective response to a variety of DNA damage. However, this process is also associated with apoptosis, upregulated secretion of inflammatory cytokine, and promoted surrounding tissue damage. When cellular senescence accumulates to a certain extent, it triggers geriatric diseases, such as chronic inflammation, immune senescence-associated tumors and incontrollable infections. Cellular senescence gene SENEX, which was cloned in 2004, has been demonstrated to play a unique gatekeeper function in human endothelial cells when stress-induced pre-mature senescence and apoptosis occurr. The phenomenon that CD4+CD25+ Treg cells accumulated in the aged population has been well studied in recent years. Now Treg accumulation related to immune-pathology has attracted more interest. CD4+CD25+ Treg did not decline and age, but accumulated and suppressed immunoreaction. The enhanced Treg number and function may be associated with stress-induced premature senescence-mediated unique cellular senescence protection mechanisms, and SENEX may play a critical role in this process. In this article, we summarize the cellular senescence and SENEX gene in the accumulation and functional activity of CD4+CD25+ Treg in the elderly.展开更多
OBJECTIVE CD4^＋CD25^＋ T regulatory （Treg） cells are a population of T cells which suppress an overactive immune system. CCR4 is a chemokine receptor involved in the recruitment of lymphocytes. Nasopharyngeal carci...OBJECTIVE CD4^＋CD25^＋ T regulatory （Treg） cells are a population of T cells which suppress an overactive immune system. CCR4 is a chemokine receptor involved in the recruitment of lymphocytes. Nasopharyngeal carcinoma （NPC） is resistant to immunosurveillance, owing to the increased number of tumor-infiltrating Treg cells which are recruited to the tumor bv CCR4.展开更多
目的:探讨CD4+CD25+Treg细胞在乙型肝炎病毒(hepatitis B virus,HBV)携带者及相关感染状态中分布特征,以期揭示其与HBV携带者的相关性,为临床干预提供依据.方法:计算机检索Pubmed、SCI、Embase、CNKI、万方及维普等数据库,依据Newcastle...目的:探讨CD4+CD25+Treg细胞在乙型肝炎病毒(hepatitis B virus,HBV)携带者及相关感染状态中分布特征,以期揭示其与HBV携带者的相关性,为临床干预提供依据.方法:计算机检索Pubmed、SCI、Embase、CNKI、万方及维普等数据库,依据NewcastleOttawa Scale(NOS)标准评价文献质量,按照PICOS原则提取资料,采用RevMan5.1软件进行Meta分析.结果:纳入文献24篇.HBV携带者外周血Treg细胞含量较健康对照高(P=0.01);与HBV携带者比较,慢性乙型肝炎Treg细胞含量较高(P=0.12),急性乙型肝炎较低(P=0.15);慢性HBV携带者Treg细胞高于非活动性HBsAg携带者(P=0.01).Treg细胞含量与HBV DNA、丙氨酸转氨酶是否存在相关性,因研究一致性差,结论尚不能确定.结论:CD4+CD25+Treg细胞可能成为影响HBV携带者预后及转归的重要因素.展开更多
文摘Cellular senescence is a signal transduction process which maintained genomic stability and stopped mammalian cell growth. Furthermore, cellular senescence induces a protective response to a variety of DNA damage. However, this process is also associated with apoptosis, upregulated secretion of inflammatory cytokine, and promoted surrounding tissue damage. When cellular senescence accumulates to a certain extent, it triggers geriatric diseases, such as chronic inflammation, immune senescence-associated tumors and incontrollable infections. Cellular senescence gene SENEX, which was cloned in 2004, has been demonstrated to play a unique gatekeeper function in human endothelial cells when stress-induced pre-mature senescence and apoptosis occurr. The phenomenon that CD4+CD25+ Treg cells accumulated in the aged population has been well studied in recent years. Now Treg accumulation related to immune-pathology has attracted more interest. CD4+CD25+ Treg did not decline and age, but accumulated and suppressed immunoreaction. The enhanced Treg number and function may be associated with stress-induced premature senescence-mediated unique cellular senescence protection mechanisms, and SENEX may play a critical role in this process. In this article, we summarize the cellular senescence and SENEX gene in the accumulation and functional activity of CD4+CD25+ Treg in the elderly.
基金the National Natural Science Foundation of China
文摘OBJECTIVE CD4^＋CD25^＋ T regulatory （Treg） cells are a population of T cells which suppress an overactive immune system. CCR4 is a chemokine receptor involved in the recruitment of lymphocytes. Nasopharyngeal carcinoma （NPC） is resistant to immunosurveillance, owing to the increased number of tumor-infiltrating Treg cells which are recruited to the tumor bv CCR4.
文摘目的:探讨CD4+CD25+Treg细胞在乙型肝炎病毒(hepatitis B virus,HBV)携带者及相关感染状态中分布特征,以期揭示其与HBV携带者的相关性,为临床干预提供依据.方法:计算机检索Pubmed、SCI、Embase、CNKI、万方及维普等数据库,依据NewcastleOttawa Scale(NOS)标准评价文献质量,按照PICOS原则提取资料,采用RevMan5.1软件进行Meta分析.结果:纳入文献24篇.HBV携带者外周血Treg细胞含量较健康对照高(P=0.01);与HBV携带者比较,慢性乙型肝炎Treg细胞含量较高(P=0.12),急性乙型肝炎较低(P=0.15);慢性HBV携带者Treg细胞高于非活动性HBsAg携带者(P=0.01).Treg细胞含量与HBV DNA、丙氨酸转氨酶是否存在相关性,因研究一致性差,结论尚不能确定.结论:CD4+CD25+Treg细胞可能成为影响HBV携带者预后及转归的重要因素.
