当前位置:
X-MOL 学术
›
Cell Stem Cell
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
AXIN2+ Pericentral Hepatocytes Have Limited Contributions to Liver Homeostasis and Regeneration.
Cell Stem Cell ( IF 19.8 ) Pub Date : 2019-12-12 , DOI: 10.1016/j.stem.2019.10.011
Tianliang Sun 1 , Monika Pikiolek 1 , Vanessa Orsini 1 , Sebastian Bergling 1 , Sjoerd Holwerda 1 , Lapo Morelli 1 , Philipp S Hoppe 1 , Lara Planas-Paz 1 , Yi Yang 2 , Heinz Ruffner 1 , Tewis Bouwmeester 1 , Felix Lohmann 1 , Luigi M Terracciano 3 , Guglielmo Roma 1 , Feng Cong 2 , Jan S Tchorz 1
Cell Stem Cell ( IF 19.8 ) Pub Date : 2019-12-12 , DOI: 10.1016/j.stem.2019.10.011
Tianliang Sun 1 , Monika Pikiolek 1 , Vanessa Orsini 1 , Sebastian Bergling 1 , Sjoerd Holwerda 1 , Lapo Morelli 1 , Philipp S Hoppe 1 , Lara Planas-Paz 1 , Yi Yang 2 , Heinz Ruffner 1 , Tewis Bouwmeester 1 , Felix Lohmann 1 , Luigi M Terracciano 3 , Guglielmo Roma 1 , Feng Cong 2 , Jan S Tchorz 1
Affiliation
![]() |
The existence of specialized liver stem cell populations, including AXIN2+ pericentral hepatocytes, that safeguard homeostasis and repair has been controversial. Here, using AXIN2 lineage tracing in BAC-transgenic mice, we confirm the regenerative potential of intestinal stem cells (ISCs) but find limited roles for pericentral hepatocytes in liver parenchyma homeostasis. Liver regrowth following partial hepatectomy is enabled by proliferation of hepatocytes throughout the liver, rather than by a pericentral population. Periportal hepatocyte injury triggers local repair as well as auxiliary proliferation in all liver zones. DTA-mediated ablation of AXIN2+ pericentral hepatocytes transiently disrupts this zone, which is reestablished by conversion of pericentral vein-juxtaposed glutamine synthetase (GS)- hepatocytes into GS+ hepatocytes and by compensatory proliferation of hepatocytes across liver zones. These findings show hepatocytes throughout the liver can upregulate AXIN2 and LGR5 after injury and contribute to liver regeneration on demand, without zonal dominance by a putative pericentral stem cell population.
中文翻译:
AXIN2 +周围型肝细胞对肝脏稳态和再生的贡献有限。
专门的肝脏干细胞群体(包括AXIN2 +中心肝细胞)是否存在以维持体内平衡和修复一直存在争议。在这里,使用BAC转基因小鼠中的AXIN2谱系追踪,我们证实了肠干细胞(ISC)的再生潜力,但在肝实质稳态中对于中心周肝细胞的作用有限。部分肝切除术后的肝再生长是通过肝细胞在整个肝脏中的增殖而不是在中心周围人群的增殖来实现的。围肝细胞损伤触发所有肝脏区域的局部修复以及辅助增殖。DTA介导的AXIN2 +周围中央肝细胞消融会暂时破坏该区域,通过将周围静脉并置的谷氨酰胺合成酶(GS)-肝细胞转化为GS +肝细胞,以及通过肝细胞在肝区的代偿性增殖,可以重新建立这种机制。这些发现表明,整个肝脏中的肝细胞在损伤后可以上调AXIN2和LGR5并按需促进肝脏再生,而不会由假定的中心周围干细胞群引起区域优势。
更新日期:2019-12-19
中文翻译:

AXIN2 +周围型肝细胞对肝脏稳态和再生的贡献有限。
专门的肝脏干细胞群体(包括AXIN2 +中心肝细胞)是否存在以维持体内平衡和修复一直存在争议。在这里,使用BAC转基因小鼠中的AXIN2谱系追踪,我们证实了肠干细胞(ISC)的再生潜力,但在肝实质稳态中对于中心周肝细胞的作用有限。部分肝切除术后的肝再生长是通过肝细胞在整个肝脏中的增殖而不是在中心周围人群的增殖来实现的。围肝细胞损伤触发所有肝脏区域的局部修复以及辅助增殖。DTA介导的AXIN2 +周围中央肝细胞消融会暂时破坏该区域,通过将周围静脉并置的谷氨酰胺合成酶(GS)-肝细胞转化为GS +肝细胞,以及通过肝细胞在肝区的代偿性增殖,可以重新建立这种机制。这些发现表明,整个肝脏中的肝细胞在损伤后可以上调AXIN2和LGR5并按需促进肝脏再生,而不会由假定的中心周围干细胞群引起区域优势。