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在无机暴露后,前列腺瘤微环境的免疫调节
Joseph J Shearer1, Cosette Rivera-Cruz1, Alexandre M B Cavalca1,2
1Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
Journal of applied toxicology : JAT
|February 23, 2026
概括
脂肪酸衍生的树皮细胞 (ASC) 和无机 (iA) 相互作用,改变前列腺癌免疫力. 这种交叉声会通过调节免疫细胞和增加免疫耐受性来促进瘤的生长,这表明环境毒素会影响癌症的进展.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 环境毒理学环境毒理学
背景情况:
- 瘤微环境 (TME) 极大地影响前列腺癌 (PCa) 的进展,通过树皮和免疫细胞的相互作用.
- 已知脂肪酸衍生的介酶体 stromal 细胞 (ASC) 调节免疫反应.
- 无机 (iAs) 是一种常见的有毒物质,与免疫抑制和癌症发展有关,但其与ASCs对PCa免疫力的联合作用尚不清楚.
研究的目的:
- 调查ASC和慢性无机 (IA) 暴露对前列腺癌 (PCa) 进展和瘤微环境 (TME) 的联合影响.
- 在小鼠PCa模型中阐明ASC-iAs交联影响免疫细胞透,基因表达和瘤生长的机制.
主要方法:
- 利用Ras驱动的小鼠PCa模型 (TC2Ras) 来模仿积极的,免疫互动的PCa.
- 评估ASC共植入和IA暴露后的瘤生长,免疫细胞透 (流细胞计) 和转录基因变化 (RNA-seq,qPCR).
- 分析了ASC受条件介质对癌细胞活力的影响.
主要成果:
- 用ASC调节的介质增强了TC2Ras细胞的活力,这种效应被IA抵消了.
- 在体内,ASC与IA联合植入导致瘤体重增加.
- ASC促进了巨细胞和CD4+T细胞的透,而iAs抑制了巨细胞和骨髓衍生抑制细胞 (MDSC).
- 转录组分析显示,在ASC瘤中持续的IFNγ-IRF1激活和IA驱动的适应性免疫的下调和免疫检查点基因的上调 (Pdcd1, Lag3).
结论:
- ASC-iAs交叉显著重塑TME,促进免疫耐受性和慢性IFNγ信号传递.
- 这种相互作用可能有助于前列腺癌的进展.
- 这项研究揭示了新的机制,即iAs等环境毒素可以通过与树皮细胞的相互作用来影响癌症免疫力.
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