Research Project
Grant-in-Aid for Scientific Research (B)
Glucagon was originally reported as a hyperglycemic substance that is present in pancreatic extract in 1923, the year of the Nobel Prize in Physiology or Medicine given to discovery of insulin. Therefore, the major physiological role of glucagon has been considered to raise blood glucose levels. However, mice deficient in glucagon gene, which we have produced, are normoglycemic and displayed increased serum amino acid levels. Our effort has been made to explore mechanisms involved in glucagon-dependent regulation of amino acid metabolism. Several lines of data and evidence are indicating that “truly” specific and physiological role of glucagon is regulation of amino acid catabolism, especially conversion of amino acids to substrates available for gluconeogenesis.
グルカゴンは血糖値を上げるホルモンであると広く認知され、糖尿病においては血糖値を上昇させることにより病態を悪化させる「悪役」とも考えられてきた。しかしながら、我々が独自に作成したグルカゴンを欠損する動物モデルを詳細に解析した結果、グルカゴンは蛋白質の構成要素であるアミノ酸の血中濃度の維持に必要不可欠な役割を持つことが明らかとなった。生体におけるアミノ酸代謝の制御のしくみは未解明の部分が多く、我々の成果をさらに展開することにより、糖尿病学・栄養学のみならず生命科学全般に広く影響を及ぼす新しい知見がもたらされることが期待できる。
All 2018 2017 2016 2015
All Journal Article (11 results) (of which Peer Reviewed: 9 results, Open Access: 9 results, Acknowledgement Compliant: 1 results) Presentation (28 results) (of which Int'l Joint Research: 2 results, Invited: 16 results)
Am J Physiol Endocrinol Metab.
Volume: 6 Issue: 6 Pages: 111-112
10.1152/ajpendo.00352.2017
Journal of Diabetes Investigation
Volume: 9 Issue: 3 Pages: 464-472
10.1111/jdi.12797
The Journal of Nutritional Biochemistry
Volume: 49 Pages: 71-79
J Diabetes Investig
Volume: 9 Issue: 1 Pages: 25-32
10.1111/jdi.12681
120006376021
Diabetologia
Volume: x Issue: 7 Pages: 1533-1541
10.1007/s00125-016-3935-2
Journal of Diabetes Investiation
Volume: 7 Issue: S1 Pages: 27-32
10.1111/jdi.12449
日本臨床「新時代の臨床糖尿病学(上)-より良い血糖管理をめざして-」
Volume: 74 Pages: 131-135
Am J Physiol Endocrinol Metab
Volume: 308 Issue: 7 Pages: 583-591
10.1152/ajpendo.00543.2014
PLoS One
Volume: 10 Issue: 7 Pages: e0133812-e0133812
10.1371/journal.pone.0133812
Volume: 10 Issue: 9 Pages: e0138322-e0138322
10.1371/journal.pone.0138322
実験医学
Volume: 33 Pages: 897-902