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痤疮丙酸杆菌促树突状细胞前体细胞动员及其对胃癌的治疗效应 被引量:2

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摘要 目的利用痤疮丙酸杆菌(P.acnes)引起的炎症反应,促进小鼠外周血中树突状细胞(DC)的动员并研究P.acnes动员的DC在体外对胃癌细胞的作用。方法C578BL/6J(B6)小鼠注射P.acnes后外周血分离单个核细胞,用流式细胞仪分选F4/80-B220-CD11c+细胞,在体外加入细胞因子GM-CSF、IL-4和TNFα共培养,通过形态学观察、表型分析和混合淋巴细胞反应鉴定它们是否能分化为成熟DC。将P.acnes动员的DC负载胃癌抗原后致敏T细胞,观察活化的T细胞在体外对胃癌细胞的杀伤效应。结果注射P.acnes1h后外周血F4/80-B220-CD11c+细胞数量即开始升高,24h后逐渐达到高峰。新鲜分离的细胞不具有成熟DC的特征。与细胞因子共培养后即具有典型的DC形态和表型,在混合淋巴细胞反应中具有极强的刺激T细胞增殖的能力。P.acnes动员的DC负载胃癌抗原后致敏T细胞对胃癌细胞的杀伤率明显高于未致敏T细胞。结论P.acnes可迅速动员F4/80-B220-CD11c+细胞进入小鼠外周血,经细胞因子的诱导后可分化为成熟DC,并可在体外诱导出针对胃癌细胞的特异性杀伤T淋巴细胞,对胃癌细胞有明显的杀伤作用,并伴有高水平的INF-γ分泌。
出处 《江苏医药》 CAS CSCD 北大核心 2006年第9期848-851,共4页 Jiangsu Medical Journal
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