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
目的探讨参苓白术散对胃癌IV期患者外周血CD4+CD25+Tregs、Foxp3 m RNA及血清细胞因子IL-10、TGF-β1的影响。方法将40例胃癌IV期患者随机分为观察组、对照组各20例。对照组予对症支持治疗,观察组对症支持治疗同时予参苓白术散治疗,治疗...目的探讨参苓白术散对胃癌IV期患者外周血CD4+CD25+Tregs、Foxp3 m RNA及血清细胞因子IL-10、TGF-β1的影响。方法将40例胃癌IV期患者随机分为观察组、对照组各20例。对照组予对症支持治疗,观察组对症支持治疗同时予参苓白术散治疗,治疗4 w后观察两组患者外周血CD4+CD25+Tregs、单核细胞Foxp3 m RNA及血清IL-10、TGF-β1浓度的变化。结果治疗后观察组患者外周血CD4+CD25+Tregs、单核细胞Foxp3 m RNA及血清IL-10、TGF-β1浓度均显著降低(P<0.05),对照组治疗后各项指标无明显变化(P>0.05),两组治疗后比较差异有统计学意义(P<0.05)。结论参苓白术散能降低胃癌IV期患者外周血CD4+CD25+Tregs和单核细胞Foxp3 m RNA的表达,降低抑制性细胞因子IL-10、TGF-β1浓度,具有免疫调节作用。展开更多
肿瘤的发生是通过多种途径引起机体免疫系统调节紊乱导致的,因此抗自身抗原的免疫反应保护机理可以使肿瘤细胞免于被自身免疫系统识别。而FOXP3作为CD4^+CD25^+调节T细胞(regulatory T cells,Tregs)表面的特征性标志,可以通过下调免疫...肿瘤的发生是通过多种途径引起机体免疫系统调节紊乱导致的,因此抗自身抗原的免疫反应保护机理可以使肿瘤细胞免于被自身免疫系统识别。而FOXP3作为CD4^+CD25^+调节T细胞(regulatory T cells,Tregs)表面的特征性标志,可以通过下调免疫活化细胞因子的表达和上调Tregs相关的细胞表面分子的表达赋予CD4^+CD25^+Tregs细胞免疫抑制功能,并有效抑制机体抗肿瘤免疫反应,参与肿瘤免疫逃逸。展开更多
CD4^+CD25^+调节性T细胞(CD4^+CD25^+regulatory T cells,CD4^+CD25^+Tregs)是具有调节功能的成熟T细胞亚群,在神经免疫疾病中具有重要作用。近年来证实CD4^+CD25^+Tregs不仅由胸腺发育而来,且可在外周血中转化生成。通过研究其转化的因...CD4^+CD25^+调节性T细胞(CD4^+CD25^+regulatory T cells,CD4^+CD25^+Tregs)是具有调节功能的成熟T细胞亚群,在神经免疫疾病中具有重要作用。近年来证实CD4^+CD25^+Tregs不仅由胸腺发育而来,且可在外周血中转化生成。通过研究其转化的因素,可达到控制CD4^+CD25^+Tregs活动并促进神经免疫疾病向良性方向发展的目的,为在细胞水平治疗神经免疫疾病提供新的治疗手段。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.
文摘目的探讨参苓白术散对胃癌IV期患者外周血CD4+CD25+Tregs、Foxp3 m RNA及血清细胞因子IL-10、TGF-β1的影响。方法将40例胃癌IV期患者随机分为观察组、对照组各20例。对照组予对症支持治疗,观察组对症支持治疗同时予参苓白术散治疗,治疗4 w后观察两组患者外周血CD4+CD25+Tregs、单核细胞Foxp3 m RNA及血清IL-10、TGF-β1浓度的变化。结果治疗后观察组患者外周血CD4+CD25+Tregs、单核细胞Foxp3 m RNA及血清IL-10、TGF-β1浓度均显著降低(P<0.05),对照组治疗后各项指标无明显变化(P>0.05),两组治疗后比较差异有统计学意义(P<0.05)。结论参苓白术散能降低胃癌IV期患者外周血CD4+CD25+Tregs和单核细胞Foxp3 m RNA的表达,降低抑制性细胞因子IL-10、TGF-β1浓度,具有免疫调节作用。
文摘肿瘤的发生是通过多种途径引起机体免疫系统调节紊乱导致的,因此抗自身抗原的免疫反应保护机理可以使肿瘤细胞免于被自身免疫系统识别。而FOXP3作为CD4^+CD25^+调节T细胞(regulatory T cells,Tregs)表面的特征性标志,可以通过下调免疫活化细胞因子的表达和上调Tregs相关的细胞表面分子的表达赋予CD4^+CD25^+Tregs细胞免疫抑制功能,并有效抑制机体抗肿瘤免疫反应,参与肿瘤免疫逃逸。
文摘CD4^+CD25^+调节性T细胞(CD4^+CD25^+regulatory T cells,CD4^+CD25^+Tregs)是具有调节功能的成熟T细胞亚群,在神经免疫疾病中具有重要作用。近年来证实CD4^+CD25^+Tregs不仅由胸腺发育而来,且可在外周血中转化生成。通过研究其转化的因素,可达到控制CD4^+CD25^+Tregs活动并促进神经免疫疾病向良性方向发展的目的,为在细胞水平治疗神经免疫疾病提供新的治疗手段。