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mTORCl in the Paneth cell niche couples intestinal stem-cell function to calorie intake

机译:Paneth细胞小生境中的mTORCl将肠道干细胞功能与卡路里摄入耦合

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摘要

How adult tissue stem and niche cells respond to the nutritional state of an organism is not well understood. Here we find that Paneth cells, a key constituent of the mammalian intestinal stem-cell (ISC) niche, augment stem-cell function in response to calorie restriction. Calorie restriction acts by reducing mechanistic target of rapamycin complex 1 (mTORCl) signalling in Paneth cells, and the ISC-enhancing effects of calorie restriction can be mimicked by rapamycin. Calorie intake regulates mTORCl in Paneth cells, but not ISCs, and forced activation of mTORCl in Paneth cells during calorie restriction abolishes the ISC-augmenting effects of the niche. Finally, increased expression of bone stromal antigen 1 (Bstl) in Paneth cells-an ectoenzyme that produces the paracrine factor cyclic ADP ribose-mediates the effects of calorie restriction and rapamycin on ISC function. Our findings establish that mTORCl non-cell-autonomously regulates stem-cell self-renewal, and highlight a significant role of the mammalian intestinal niche in coupling stem-cell function to organismal physiology.%减少热量摄取同时维持充足营养可延长多种不同生物的寿命,这可能是通过保持干细胞和先祖细胞的功能来进行的。David Sabatirli及其同事发现,在小鼠的小肠中,热量限制导致具有增强的再生能力的小肠干细胞(1SC)数量增加。这种效应可通过Paneth细胞(ISC生存环境中的重要成分)中的mTOR信号作用的调制来介导。热量限制导致Pa rleth细胞中Bstl的表达及“环ADP核糖”(它以一种“旁分泌”方式作用于ISC上)随后的分泌。这些发现反映了一种生物的干细胞功能与营养状态之间的一个联系,也提出这样一种可能性mTORCl抑制因子或Bstl模拟物在提高小肠再生和功能方面也许有治疗作用。
机译:成年组织干细胞和小生境细胞如何响应生物体的营养状态尚不清楚。在这里,我们发现Paneth细胞是哺乳动物肠道干细胞(ISC)生态位的关键组成部分,可响应卡路里限制而增强干细胞功能。热量限制通过减少Paneth细胞中雷帕霉素复合物1(mTORC1)信号转导的机制而起作用,雷帕霉素可模仿卡路里限制的ISC增强作用。卡路里摄入量调节Paneth细胞中的mTORC1,但不调节ISC,并且在卡路里限制期间Paneth细胞中mTORC1的强制激活消除了利基的ISC增强作用。最后,Paneth细胞(一种产生旁分泌因子环状ADP核糖的外在酶)中骨基质抗原1(Bstl)的表达增加,介导了热量限制和雷帕霉素对ISC功能的影响。我们的发现证实,mTORC1非细胞自主地调节干细胞的自我更新,并突出了哺乳动物肠道生态位在干细胞功能与机体生理学耦合中的重要作用。 David Sabatirli及其同事发现,在小鼠的小肠中,可以限制导致增强的再生能力的小肠干细胞(1SC)数量增加。这种效应可通过Paneth细胞(ISC生存环境中的重要成分)的mTOR信号作用的调制来介导。这些发现反映了一种生物的干细胞功能与营养状态之间的一个联系,也提出这样一种mTORCl抑制因子或Bstl模拟物在提高小肠再生中。和功能方面也许有治疗作用。

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  • 来源
    《Nature》 |2012年第7404期|p.490-495a1|共7页
  • 作者单位

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA,Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA,Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142: Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA;

    Whitehead Institute for Biomedical Research, Boston, Massachusetts 02142, Department of Biology, MIT, Cambridge, Massachusetts 02139, Howard Hughes Medical Institute, MIT, Cambridge, Massachusetts 02139, Broad Institute of Harvard and MIT. Seven Cambridge Center Cambridge, Massachusetts 02142, The David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts 02139, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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