Glucose Uptake and Runx2 Synergize to Orchestrate Osteoblast Differentiation and Bone Formation.
Glucose Uptake and Runx2 Synergize to Orchestrate Osteoblast Differentiation and Bone Formation.
复制标题
DOI:
10.1016/j.cell.2015.05.029
复制
发表时间:
2015-06-18
期刊:
影响因子:
64.5
通讯作者:
Karsenty G
中科院分区:
文献类型:
--
作者:
Wei J;Shimazu J;Makinistoglu MP;Maurizi A;Kajimura D;Zong H;Takarada T;Lezaki T;Pessin JE;Hinoi E;Karsenty G
The synthesis of Type I collagen, the main component of the bone matrix, precedes the expression of Runx2, the earliest determinant of osteoblast differentiation. We hypothesized that the osteoblast's energetic needs might explain this apparent paradox. We show here that glucose, the main nutrient of osteoblasts, is transported in these cells through Glut1 whose expression precedes that of Runx2. Glucose uptake favors osteoblast differentiation by suppressing the AMPK-dependent proteasomal degradation of Runx2 and promotes bone formation by inhibiting another function of AMPK. While Runx2 cannot induce osteoblast differentiation when glucose uptake is compromised, raising blood glucose levels restores collagen synthesis in Runx2-null osteoblasts and initiates bone formation in Runx2-deficient embryos. Moreover, Runx2 favors Glut1 expression, and this feed-forward regulation between Runx2 and Glut1 determines the onset of osteoblast differentiation during development and the extent of bone formation throughout life. These results reveal an unexpected intricacy between bone and glucose metabolism.
登录
查看更多内容
影响因子:
2.5
作者:
CHAPPARD, D;PALLE, S;RIFFAT, G
通讯作者:
RIFFAT, G
影响因子:
3.9
作者:
Tessa, Alessandra;Salvi, Sergio;Santorelli, Filippo M
通讯作者:
Santorelli, Filippo M
影响因子:
4.6
作者:
Yu, K;Xu, JS;Ornitz, DM
通讯作者:
Ornitz, DM
影响因子:
64.5
作者:
Lee, Na Kyung;Sowa, Hideaki;Karsenty, Gerard
通讯作者:
Karsenty, Gerard
影响因子:
64.5
作者:
Ducy, P;Zhang, R;Karsenty, G
通讯作者:
Karsenty, G