Leucine promotes glucose uptake in skeletal muscles of rats. 2002

Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
Pharmaceutical Research Laboratories, Ajinomoto Co., Inc., 1-1, Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-8681, Japan. shinobu_nishitani@ajinomoto.com

Soleus muscles isolated from normal rats were incubated to evaluate whether or not leucine promotes glucose uptake under insulin-free conditions, using a labeled 2-deoxyglucose uptake assay. Glucose uptake was promoted by 2mM leucine. A metabolite of leucine, alpha-ketoisocaproic acid (alpha-KIC), also exhibited a similar stimulatory effect, although this was not as potent as leucine. Stimulation of glucose uptake by leucine was completely canceled by pre-treatment with either 10 microM LY294002, a specific inhibitor of phosphatidylinositol 3-kinase (PI3-kinase), or 6 microM GF109203X, a specific inhibitor of protein kinase C (PKC). No significant change was observed by pre-treatment with 1 microM rapamycin, a specific inhibitor of mammalian target of rapamycin (mTOR). These results suggest that leucine stimulates glucose transport in skeletal muscle via PI3-kinase and PKC pathways independently of the mammalian target of mTOR. They also suggest that leucine stimulates glucose transport by an insulin-independent mechanism.

UI MeSH Term Description Entries
D007328 Insulin A 51-amino acid pancreatic hormone that plays a major role in the regulation of glucose metabolism, directly by suppressing endogenous glucose production (GLYCOGENOLYSIS; GLUCONEOGENESIS) and indirectly by suppressing GLUCAGON secretion and LIPOLYSIS. Native insulin is a globular protein comprised of a zinc-coordinated hexamer. Each insulin monomer containing two chains, A (21 residues) and B (30 residues), linked by two disulfide bonds. Insulin is used as a drug to control insulin-dependent diabetes mellitus (DIABETES MELLITUS, TYPE 1). Iletin,Insulin A Chain,Insulin B Chain,Insulin, Regular,Novolin,Sodium Insulin,Soluble Insulin,Chain, Insulin B,Insulin, Sodium,Insulin, Soluble,Regular Insulin
D007651 Keto Acids Carboxylic acids that contain a KETONE group. Oxo Acids,Oxoacids,Acids, Keto,Acids, Oxo
D007930 Leucine An essential branched-chain amino acid important for hemoglobin formation. L-Leucine,Leucine, L-Isomer,L-Isomer Leucine,Leucine, L Isomer
D008297 Male Males
D008954 Models, Biological Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment. Biological Model,Biological Models,Model, Biological,Models, Biologic,Biologic Model,Biologic Models,Model, Biologic
D004305 Dose-Response Relationship, Drug The relationship between the dose of an administered drug and the response of the organism to the drug. Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
D004791 Enzyme Inhibitors Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction. Enzyme Inhibitor,Inhibitor, Enzyme,Inhibitors, Enzyme
D005947 Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001692 Biological Transport The movement of materials (including biochemical substances and drugs) through a biological system at the cellular level. The transport can be across cell membranes and epithelial layers. It also can occur within intracellular compartments and extracellular compartments. Transport, Biological,Biologic Transport,Transport, Biologic

Related Publications

Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
May 1978, The Journal of biological chemistry,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
December 2015, Experimental gerontology,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
August 1981, Diabetes,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
May 2005, Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
January 1988, Comparative biochemistry and physiology. A, Comparative physiology,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
May 1990, Muscle & nerve,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
March 2007, Acta pharmacologica Sinica,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
January 2012, PloS one,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
January 1991, Comparative biochemistry and physiology. C, Comparative pharmacology and toxicology,
Shinobu Nishitani, and Tsuyoshi Matsumura, and Shoji Fujitani, and Ichiro Sonaka, and Yutaka Miura, and Kazumi Yagasaki
June 1994, Brain research,
Copied contents to your clipboard!