胸膜上皮细胞的微环境重编程,使其成为皮肤多能干细胞
Paola Bonfanti1, Stéphanie Claudinot, Alessandro W Amici
1Laboratory of Stem Cell Dynamics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Nature
|August 21, 2010
概括
研究人员发现,当暴露在皮肤微环境中时,胸膜上皮细胞 (TECs) 可以改变其命运,成为毛囊干细胞. 这一发现揭示了上皮细胞的可塑性和微环境线索的影响.
科学领域:
- 发育生物学 发展生物学
- 免疫学 免疫学 免疫学
- 干细胞生物学 干细胞生物学
背景情况:
- 甲状腺对于T细胞发育 (甲状腺形成) 和建立自我耐受性至关重要.
- 胸膜上皮细胞 (TECs) 形成了一个独特的网络,对胸膜形成至关重要,并表达像空气这样的关键分子.
- 维持TEC身份的机制以及在骨髓中分层表皮标记物的起源尚不清楚.
研究的目的:
- 为了研究克隆性胸膜上皮细胞 (TECs) 的可塑性和潜力.
- 了解微环境线索在指导上皮细胞命运中的作用.
- 探索在细胞分化中跨越生殖层边界的潜力.
主要方法:
- 从老鼠胸腺中分离并广泛培养克隆原性TECs.
- 评估TECs整合到胸膜上皮网络的能力,并表达MHC II和Aire.
- 将培养的TEC暴露在诱导性皮肤微环境中,以观察命运变化.
- 对与细胞命运重定向相关的基因表达变化的分析.
主要成果:
- 一个克隆性TEC的种群被确定并培养,保留了关键的胸膜特征.
- 这些TEC可以不可逆转地采用毛囊多能干细胞的命运.
- 暴露在皮肤微环境中诱导了显著的基因表达变化,重定向细胞命运.
- 这表明微环境线索可以改变胚胎层上的上皮细胞命运.
结论:
- 微环境的线索足以重定向上皮细胞的命运,甚至跨越原始的胚胎层边界.
- 这项研究强调了TEC的显著可塑性及其提高功效的潜力.
- 这些发现挑战了关于细胞命运决定和胚胎层限制的传统观点.
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