Differential regulation of AMPK activation in leptin‐and creatine‐deficient mice
Differential regulation of AMPK activation in leptin‐and creatine‐deficient mice
复制标题
瘦素和肌酸缺乏小鼠中 AMPK 激活的差异调节
DOI:
10.1096/fj.12-225136
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Choe CU
中科院分区:
文献类型:
--
作者:
Stockebrand M;Sauter K;Isbrandt D;Choe CU
AMP‐activated protein kinase (AMPK) is a key sensor and regulator of energy homeostasis. Previously, we demonstrated that intracellular energy depletion byL‐arginine:glycine amidinotransferase (AGAT) deficiency resulted in AMPK activation and protected from metabolic syndrome. In the present study, we show tissue‐specific leptin dependence of AMPK activation by energy depletion. We investigated leptin‐dependent AMPK regulation in AGAT‐ and leptin‐deficient (d/d ob/ob) mice. Like ob/ob mice, but unlike d/d mice, d/d ob/ob mice were obese and glucose intolerant. Therefore, leptin is a prerequisite for resistance to metabolic syndrome in AGAT‐deficient mice. Quantitative Western blots revealed a 4‐fold increase in AMPK activation in skeletal muscle of d/d ob/ob mice (P<0.001). However, AMPK activation was absent in white adipose tissue (WAT) and liver. Compared with blood glucose levels in ob/ob mice, fasting levels were still reduced and therefore did not show leptin dependence (wild‐type, 79.4±3.9 mg/dl; d/d, 68.4±3.2 mg/dl;P<0.05). In ob/ob mice and wild‐type mice, 5‐aminoimidazole‐4‐carboxamide‐1‐β‐d‐ribofuranoside (AICAR), in combination with leptin, augmented glucose tolerance compared with AICAR alone, whereas no improvement was found under conditions of high‐fatdiet feeding. These findings reveal a previously unknown synergistic AMPK activation by leptin and intracellular energy depletion, suggesting that AMPK activation can be therapeutically effective in metabolic syndrome only if leptin sensitivity is preserved.—Stockebrand, M., Sauter, K., Neu, A., Isbrandt, D., Choe, C., Differential regulation of AMPK activation in leptin‐ and creatine‐deficient mice. FASEBJ. 27, 4147‐4156 (2013). www.fasebj.org
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影响因子:
3.5
作者:
Choe, Chi-un;Nabuurs, Christine;Isbrandt, Dirk
通讯作者:
Isbrandt, Dirk
影响因子:
15.9
作者:
Berglund, Eric D.;Vianna, Claudia R.;Elmquist, Joel K.
通讯作者:
Elmquist, Joel K.
DOI:
10.1073/pnas.0509001102
发表时间:
2005-12-13
影响因子:
11.1
作者:
Wang, MY;Orci, L;Unger, RH
通讯作者:
Unger, RH
影响因子:
5.5
作者:
Nabuurs, C. I.;Choe, C. U.;Heerschap, A.
通讯作者:
Heerschap, A.
影响因子:
6.1
作者:
Ipsiroglu, OS;Stromberger, C;Stöckler-Ipsiroglu, S
通讯作者:
Stöckler-Ipsiroglu, S