Tissue Homeostasis and Non-Homeostasis: From Cell Life Cycles to Organ States.

Tissue Homeostasis and Non-Homeostasis: From Cell Life Cycles to Organ States.
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DOI:
10.1146/annurev-cellbio-120420-114855
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发表时间:
2022-10-06
影响因子:
11.3
通讯作者:
O'Brien, Lucy Erin
O'Brien, Lucy Erin
中科院分区:
生物学1区
文献类型:
--
作者:
O'Brien, Lucy Erin

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虽然组织稳态(稳态)意味着稳定,但我们的器官处于一种持续的、大规模的细胞流动状态。这种流动支撑着器官的自我平衡更新能力,在功能需求改变时非自我平衡地调整大小,以及在损伤或受伤后恢复自我平衡换句话说,是动态的。在这里,我研究了器官尺度细胞动力学的基本单位:出生,分化和死亡的细胞生命周期。重点上皮器官,我讨论了空间格局和时间动力学的生命周期阶段取决于谱系组织和组织结构。我回顾了阶段之间的信号如何协调生命周期动态,以执行稳态,我强调如何特定的阶段是短暂的不平衡,以驱动器官再生或修复。最后,我提出,将器官视为不是细胞而是细胞生命周期的集合,这为破译稳态和非稳态组织状态提供了强大的Vantage。
Although tissue homeostasis—the steady state—implies stability, our organs are in a state of continual, large-scale cellular flux. This flux underpins an organ’s ability to homeostatically renew, to non-homeostatically resize upon altered functional demand, and to return to homeostasis after resizing or injury—in other words, to be dynamic. Here, I examine the basic unit of organ-scale cell dynamics: the cellular life cycle of birth, differentiation, and death. Focusing on epithelial organs, I discuss how spatial patterns and temporal kinetics of life cycle stages depend upon lineage organization and tissue architecture. I review how signaling between stages coordinates life cycle dynamics to enforce homeostasis, and I highlight how particular stages are transiently unbalanced to drive organ resizing or repair. Finally, I offer that considering organs as a collective of not cells but rather cell life cycles provides a powerful vantage for deciphering homeostatic and non-homeostatic tissue states.
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