Deletion of Glut1 in early postnatal cartilage reprograms chondrocytes toward enhanced glutamine oxidation.
Deletion of Glut1 in early postnatal cartilage reprograms chondrocytes toward enhanced glutamine oxidation.
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出生后早期软骨中葡萄糖转运蛋白1(Glut1)的缺失会使软骨细胞重编程,增强其谷氨酰胺氧化能力。
DOI:
10.1038/s41413-021-00153-1
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发表时间:
2021-08-23
期刊:
影响因子:
12.7
通讯作者:
O'Keefe RJ
中科院分区:
文献类型:
--
作者:
Wang C;Ying J;Niu X;Li X;Patti GJ;Shen J;O'Keefe RJ
Glucose metabolism is fundamental for the functions of all tissues, including cartilage. Despite the emerging evidence related to glucose metabolism in the regulation of prenatal cartilage development, little is known about the role of glucose metabolism and its biochemical basis in postnatal cartilage growth and homeostasis. We show here that genetic deletion of the glucose transporter Glut1 in postnatal cartilage impairs cell proliferation and matrix production in growth plate (GPs) but paradoxically increases cartilage remnants in the metaphysis, resulting in shortening of long bones. On the other hand, articular cartilage (AC) with Glut1 deficiency presents diminished cellularity and loss of proteoglycans, which ultimately progress to cartilage fibrosis. Moreover, predisposition to Glut1 deficiency severely exacerbates injury-induced osteoarthritis. Regardless of the disparities in glucose metabolism between GP and AC chondrocytes under normal conditions, both types of chondrocytes demonstrate metabolic plasticity to enhance glutamine utilization and oxidation in the absence of glucose availability. However, uncontrolled glutamine flux causes collagen overmodification, thus affecting extracellular matrix remodeling in both cartilage compartments. These results uncover the pivotal and distinct roles of Glut1-mediated glucose metabolism in two of the postnatal cartilage compartments and link some cartilage abnormalities to altered glucose/glutamine metabolism.
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影响因子:
56.9
作者:
Jaakkola, P;Mole, DR;Ratcliffe, PJ
通讯作者:
Ratcliffe, PJ
影响因子:
64.8
作者:
通讯作者:
--
影响因子:
28.2
作者:
Cantor JR;Sabatini DM
通讯作者:
Sabatini DM
DOI:
10.1073/pnas.93.18.9493
发表时间:
1996-09-03
影响因子:
11.1
作者:
Hochachka, PW;Buck, LT;Land, SC
通讯作者:
Land, SC
影响因子:
4.3
作者:
Hitchcock, Alicia M.;Yates, Karen E.;Zaia, Joseph
通讯作者:
Zaia, Joseph