环素通过细胞自主机制诱导癌症的进展
M Hojo1, T Morimoto, M Maluccio
1Department of Transplantation Medicine and Extracorporeal Therapy, Weill Medical College of Cornell University, New York, New York 10021, USA.
Nature
|February 24, 1999
概括
环素是一种免疫抑制剂,通过细胞自主机制直接增加癌细胞的侵入性,独立于宿主免疫力. 这一过程涉及转化增长因子-β (TGF-β),并有助于移植后恶性瘤的增加.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 器官移植后恶性病是显著的风险,通常与免疫抑制疗法有关,损害宿主免疫力.
- 免疫抑制剂促进癌症进展的确切机制需要进一步阐明.
研究的目的:
- 调查潜在的宿主免疫独立机制,通过免疫抑制剂增强恶性瘤.
- 探索环素在诱导促进癌症进展的细胞变化的作用.
主要方法:
- 用环素 (环素A) 治疗腺癌细胞,并分析表型变化 (形态,运动性,结独立生长).
- 对抗转化生长因子-β (TGF-β) 的单克隆抗体对循环氨酸诱导变化的影响的评估.
- 使用免疫缺陷SCID-色小鼠进行体内研究,以评估循环氨酸治疗后的瘤生长和转移,有或没有抗TGF-β抗体.
主要成果:
- 环素诱导了腺癌细胞显著的形态变化,增加了运动性和固独立生长,这表明侵入性增强.
- 这些由环素诱导的变化被抗TGF-β单克隆抗体所废除.
- 在体内,环素促进了免疫缺陷小鼠的瘤生长和转移,这种效应被抗TGF-β抗体阻止.
结论:
- 环素通过细胞自主机制促进癌症的进展,独立于宿主免疫抑制.
- 环素诱导的转化生长因子-β (TGF-β) 生产在调解这种亲恶性效应方面发挥着至关重要的作用.
- 这些发现表明,针对TGF-β的新型治疗策略可以减轻与免疫抑制药物相关的癌症风险.
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