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小鼠松果体同基因异体胸腺内移植对免疫衰老作用的研究

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摘要 目的探讨小鼠松果体同基因异体胸腺内移植对免疫衰老的作用。方法将幼龄小鼠松果体移植至老龄小鼠胸腺内,术后切片观察确定手术可靠性。采用实时定量PCR方法对术后受体小鼠胸腺初始T细胞标记物(sjTRECs)进行绝对定量,以评价免疫中枢器官胸腺的生成和输出功能;采用实时定量逆转录PCR方法对术后受体小鼠的几种胸腺状态和功能相关基因的表达进行相对定量,以直接评价胸腺微环境。结果切片观察到移植的松果体在小鼠胸腺内存活良好;手术组小鼠的胸腺和脾脏淋巴细胞内的sjTRECs水平高于伪手术组(P<0.01);与伪手术组的小鼠相比,手术组的小鼠胸腺相关基因表达变化比值为:LMO2:0.78±0.08、Foxn1:5.27±1.58,IL-7:3.46±1.84。结论松果体移植后老年小鼠胸腺的初始T细胞生成和输出功能有显著的提高,胸腺微环境分泌因子的基因表达显著增加,而负调控因子的表达相对下降,回复了衰老胸腺的功能,因而小鼠松果体移植对于以胸腺退化为先导的免疫衰老有逆转的作用。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2008年第16期1563-1565,共3页 Chinese Journal of Gerontology
基金 湛江科技计划项目(2007C02010) 广东医学院博士启动基金(B2006097)
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