专门的上皮接受细胞决定了色素的颜色模式
Lorin Weiner1, Rong Han, Bianca M Scicchitano
1Cutaneous Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
Cell
|September 7, 2007
概括
哺乳动物的毛皮图案来自于接受色素的皮肤细胞,而不仅仅是色素细胞. 转录因子Foxn1激活了这些受体,指导着色素的放置,并可能推动动物色彩的进化.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 哺乳动物颜料的颜色
背景情况:
- 哺乳动物使用色素细胞产生外部颜色,但控制模式形成的机制尚不清楚.
- 现有的知识集中在色素产生细胞上,忽视了在模式发展中的其他细胞作用.
研究的目的:
- 阐明哺乳动物外套模式形成的细胞和分子机制.
- 为了确定关键的基因和细胞相互作用,参与指导色素细胞的放置和黑色素转移.
主要方法:
- 利用小鼠模型来研究色素模式的细胞基础.
- 确定了涉及"色素受体表型"的转录因子和生长因子.
- 研究了Foxn1及其点Fgf2在招募和指导黑色素细胞中的作用.
主要成果:
- 发现色素图案来源于专门的"色素受体"上皮细胞.
- 确定了Foxn1作为激活色素受体表型的关键调节剂.
- 表明受体释放的Fgf2会影响黑色素细胞的行为,并且改变受体分布会改变色素模式.
结论:
- 颜料受体细胞作为皮肤模板,指导黑色素细胞的定位和黑色素沉积.
- 福克斯n1通路对于建立这种模板和协调上皮细胞与色素的发育至关重要.
- 这种机制提供了对各种哺乳动物毛皮色彩的演变的洞察.
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