组织记忆依赖于远端未受损区域的干细胞启动。
Tissue memory relies on stem cell priming in distal undamaged areas.
机构信息
Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy.
Molecular Biotechnology Center 'Guido Tarone', University of Turin, Torino, Italy.
出版信息
Nat Cell Biol. 2023 May;25(5):740-753. doi: 10.1038/s41556-023-01120-0. Epub 2023 Apr 20.
Epithelial cells that participated in wound repair elicit a more efficient response to future injuries, which is believed to be locally restricted. Here we show that cell adaptation resulting from a localized tissue damage has a wide spatial impact at a scale not previously appreciated. We demonstrate that a specific stem cell population, distant from the original injury, originates long-lasting wound memory progenitors residing in their own niche. Notably, these distal memory cells have not taken part in the first healing but become intrinsically pre-activated through priming. This cell state, maintained at the chromatin and transcriptional level, leads to an enhanced wound repair that is partially recapitulated through epigenetic perturbation. Importantly wound memory has long-term harmful consequences, exacerbating tumourigenesis. Overall, we show that sub-organ-scale adaptation to injury relies on spatially organized memory-dedicated progenitors, characterized by an actionable cell state that establishes an epigenetic field cancerization and predisposes to tumour onset.
参与伤口修复的上皮细胞对未来的损伤会产生更有效的反应,这种反应被认为是局部受限的。在这里,我们表明,由于局部组织损伤而导致的细胞适应具有以前未被认识到的广泛空间影响。我们证明了一种特定的干细胞群体,远离原始损伤,产生了长期存在的、位于自身生态位中的伤口记忆祖细胞。值得注意的是,这些远端记忆细胞并没有参与第一次愈合,但通过启动而内在地预先激活。这种细胞状态,在染色质和转录水平上得以维持,导致了增强的伤口修复,部分通过表观遗传干扰得到再现。重要的是,伤口记忆具有长期的有害后果,会加剧肿瘤发生。总的来说,我们表明,对损伤的亚器官尺度适应依赖于空间组织的记忆专用祖细胞,其特征是一种可操作的细胞状态,建立了一个表观遗传的癌变场,并易导致肿瘤发生。