Glycemic control releases regenerative potential of pancreatic beta cells blocked by severe hyperglycemia.
Glycemic control releases regenerative potential of pancreatic beta cells blocked by severe hyperglycemia.
复制标题
血糖控制释放了被严重高血糖阻塞的胰腺β细胞的再生潜力。
DOI:
10.1016/j.celrep.2022.111719
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发表时间:
2022-11-29
期刊:
影响因子:
8.8
通讯作者:
中科院分区:
文献类型:
--
作者:
Diabetogenic ablation of beta cells in mice triggers a regenerative response whereby surviving beta cells proliferate and euglycemia is regained. Here, we identify and characterize heterogeneity in response to beta cell ablation. Efficient beta cell elimination leading to severe hyperglycemia (>28 mmol/L), causes permanent diabetes with failed regeneration despite cell cycle engagement of surviving beta cells. Strikingly, correction of glycemia via insulin, SGLT2 inhibition, or a ketogenic diet for about 3 weeks allows partial regeneration of beta cell mass and recovery from diabetes, demonstrating regenerative potential masked by extreme glucotoxicity. We identify gene expression changes in beta cells exposed to extremely high glucose levels, pointing to metabolic stress and downregulation of key cell cycle genes, suggesting failure of cell cycle completion. These findings reconcile conflicting data on the impact of glucose on beta cell regeneration and identify a glucose threshold converting glycemic load from pro-regenerative to anti-regenerative. Furth-Lavi et al. show that massive beta cell ablation resulting in extreme hyperglycemia blocks beta cell replication, preventing recovery of glycemic control by downregulating key cell cycle genes and suppressing cell cycle progression. This blockade is reversed by lowering glucose levels with insulin, an SGLT2 inhibitor, or ketogenic diet.
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影响因子:
7.7
作者:
Dahan T;Ziv O;Horwitz E;Zemmour H;Lavi J;Swisa A;Leibowitz G;Ashcroft FM;In't Veld P;Glaser B;Dor Y
通讯作者:
Dor Y
影响因子:
23.9
作者:
Gribben C;Lambert C;Messal HA;Hubber EL;Rackham C;Evans I;Heimberg H;Jones P;Sancho R;Behrens A
通讯作者:
Behrens A
影响因子:
2.2
作者:
Lee, Seung-Hee;Hao, Ergeng;Levine, Fred
通讯作者:
Levine, Fred
影响因子:
7.7
作者:
Matschinsky, FM;Glaser, B;Magnuson, MA
通讯作者:
Magnuson, MA
影响因子:
64.8
作者:
Dor, Y;Brown, J;Melton, DA
通讯作者:
Melton, DA