Pancreatic insulin release in vitamin C-deficient senescence marker protein-30/gluconolactonase knockout mice.
Pancreatic insulin release in vitamin C-deficient senescence marker protein-30/gluconolactonase knockout mice.
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DOI:
10.3164/jcbn.11-52
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发表时间:
2012-03
影响因子:
2.4
通讯作者:
Hasegawa G
中科院分区:
文献类型:
--
作者:
Senmaru T;Yamazaki M;Okada H;Asano M;Fukui M;Nakamura N;Obayashi H;Kondo Y;Maruyama N;Ishigami A;Hasegawa G
We recently identified senescence marker protein-30 as the lactone-hydrolyzing enzyme gluconolactonase, which is involved in vitamin C biosynthesis. In this study, we investigated the effects of vitamin C on insulin secretion from pancreatic β-cells using senescence marker protein-30/gluconolactonase knockout mice. In intraperitoneal glucose tolerance tests, vitamin C-deficient senescence marker protein-30/gluconolactonase knockout mice demonstrated impaired glucose tolerance with significantly lower blood insulin levels at 30 and 120 min post-challenge than in wild type mice (p<0.01–0.05). In contrast, vitamin C-sufficient senescence marker protein-30/gluconolactonase knockout mice demonstrated significantly higher blood glucose and lower insulin only at the 30 min post-challenge time point (p<0.05). Senescence marker protein-30/gluconolactonase knockout mice showed enhanced insulin sensitivity regardless of vitamin C status. Static incubation of islets revealed that 20 mM glucose-stimulated insulin secretion and islet ATP production were significantly decreased at 60 min only in vitamin C-deficient SMP30/GNL knockout mice relative to wild type mice (p<0.05). These results indicate that the site of vitamin C action lies between glycolysis and mitochondrial oxidative phosphorylation, while SMP30 deficiency itself impairs the distal portion of insulin secretion pathway.
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影响因子:
4.8
作者:
Uchizono, Y;Iwase, M;Iida, M
通讯作者:
Iida, M
DOI:
10.1164/rccm.200511-1816oc
发表时间:
2006-09-01
影响因子:
24.7
作者:
Sato, Tadashi;Seyama, Kuniaki;Ishigami, Alkihito
通讯作者:
Ishigami, Alkihito
影响因子:
7.7
作者:
LACY, PE;KOSTIANOVSKY, M
通讯作者:
KOSTIANOVSKY, M
DOI:
10.1006/bbrc.1997.6106
发表时间:
1997-02-24
影响因子:
3.1
作者:
Dou, CZ;Xu, DP;Wells, WW
通讯作者:
Wells, WW
DOI:
10.1016/0304-4165(92)90108-7
发表时间:
1992-04-22
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
FUJITA, T;UCHIDA, K;MARUYAMA, N
通讯作者:
MARUYAMA, N