関連する実験動画
Updated: Jun 14, 2026

08:18
A Model of Chronic Nutrient Infusion in the Rat
Published on: August 14, 2013
インスリン型の成長因子Iの循環濃度とグルコース不耐性の発症:前向きな観察研究
Manjinder S Sandhu1, Adrian H Heald, J Martin Gibson
1Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge, Cambridge, UK.
Lancet (London, England)
|June 7, 2002
まとめ
インスリン類似成長因子I (IGF-I) のレベルが高くなった場合,グルコース不耐症の発生を防ぐことができます. IGF-Iのこの保護効果は,IGF結合タンパク質-1 (IGFBP-1) レベルの影響を受けます.
科学分野:
- エンドクリノロジー エンドクリノロジー
- メタボリック・ヘルス メタボリック・ヘルス
- 糖尿病に関する研究
背景:
- インスリン類似成長因子I (IGF-I) とIGF結合タンパク質-1 (IGFBP-1) は,グルコースの恒常性に関与しています.
- 実験モデルは適応的な代謝変化を示し,将来的なヒト研究を必要とします.
研究 の 目的:
- 循環中のIGF-IおよびIGFBP-1濃度とグルコース不耐性の発症との関連性を将来的に調査する.
- IGF-IとIGFBP-1が将来のグルコース耐性状態を予測するかどうかを判断する.
主な方法:
- 45歳から65歳までの615人のノルモグリセミックな成人を対象としたコホート研究.
- 経口グルコース耐性検査は,出血時におよび4.5年後に行われました.
- IGF-IとIGFBP-1の血清濃度は,ベースラインで測定されました.
主要な成果:
- 4.5年後,参加者の8%がグルコース耐性障害または2型糖尿病を発症しました.
- IGF-I濃度の上昇は,グルコース不耐症 (OR0.50) の発生リスクの低下と関連していた.
- IGF-Iとグルコース不耐症の間のこの逆関連は,IGFBP-1によって独立して修正されました.
結論:
- 循環中のIGF-Iレベルは,グルコース不耐性の発症に対して保護的役割を果たしているようです.
- IGF-IとIGFBP-1の相互作用は,グルコースホメオスタシスの重要な決定因子です.
- これらの発見は,グルコース不耐性リスクの潜在的なバイオマーカーとしてのIGF-Iを支持しています.
関連する概念動画
Glucose Absorption Into the Small Intestine
Complex carbohydrates consumed cannot be absorbed into the small intestine in their original form. First, they must be hydrolyzed to a monosaccharide form such as glucose or galactose. These monosaccharides are then transported across the intestinal membrane and into the blood via transcellular transport. The intestinal epithelial cells allow the movement of these monosaccharides with a defined 'entry' through membrane transporter proteins present on their apical membrane and 'exit' via the...
Hormones Regulating Blood Glucose
Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
In addition to accelerating glucose uptake and utilization, insulin has...
Glucose Homeostasis: Regulation of Blood Glucose
Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are co-secreted in...
Insulin and C-peptide are co-secreted in...
Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...

