関連する実験動画
Updated: Jan 29, 2026

14:22
Brain Pericyte Calcium and Hemodynamic Imaging in Transgenic Mice In Vivo
Published on: November 20, 2021
4.2K
イン・ビボ画像を用いた糖尿病マウスにおけるエンパグリフロジンによる血球動力学的機能の評価
Kengo Kidokoro1, David Z I Cherney2, Andrea Bozovic3
1Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan (K.K., H.N., M.S., E.K., T.S., N.K.).
Circulation
|February 19, 2019
まとめ
エムパグリフロジンなどのナトリウム・グルコース・コトランスポーター2阻害剤は,糖尿病のマウスの腎臓過濾を減少させます. この効果はアデノシンとA1アデノシン受容体によって媒介され,腎臓の保護に貢献します.
科学分野:
- 腎臓科
- 薬理学について
- 心血管医学
背景:
- SGLT2阻害剤は,過濾を緩和することで腎臓を保護し,心血管疾患のリスクを軽減します.
- SGLT2阻害に対する腎臓反応のメカニズムについては,さらなる解明が必要である.
- この研究では,血液動力学と管球体フィードバックに焦点を当てて,エンパグリフロジンの腎臓保護効果を調査しています.
研究 の 目的:
- エムパグリフロジンによるSGLT2抑制の腎臓保護効果を調査する.
- エムパグリフロジンの腎への影響における 球球血動力学と管球球体フィードバックの役割を調査する.
- これらの反応を媒介する特定の分子経路を解明する.
主な方法:
- 自発的に糖尿病に罹った Ins2+/ Akita のマウスとC57BL/6の対照群を用いた.
- エムパグリフロジンと特定の阻害剤 (ニューロン酸化窒素合成酵素,サイクロオキシゲネーゼ-2,アデノシン受容体抗体) の投与
- in vivo 多光子顕微鏡と量化された尿バイオマーカーを用いて単一ネフロン球膜過濾率 (snGFR) を測定した.
主要な成果:
- 糖尿病のマウスでは,エンパグリフロジンは過濾を著しく減少させた (snGFRは15. 8から8. 0nL/ minに減少した).
- 糖尿病のマウスでは,エンパグリフロジンはアファレント動脈の膨張を改善し,グルメルアルブミンの透過性を高めました.
- 尿中のアデノシン分泌が増加し,A1アデノシン受容体の抗作用により,エムパグリフロジンの腎的効果が阻害された.
結論:
- アデノシン/A1アデノシン受容体の経路は,SGLT2抑制中のsnGFRの管球体フィードバックの調節に不可欠です.
- これらの発見は,SGLT2阻害剤の腎臓と心血管の効果に寄与する重要なメカニズムを強調しています.
- エムパグリフロジンは,アデノシン経路によって媒介されるアフェレント動脈狭窄による過濾を減少させます.
関連する概念動画
Glomerular Filtration
5.2K
The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
5.2K
Pathophysiology of Diabetes
3.5K
Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
3.5K
Glomerular Filtration Rate and its Regulation
5.4K
The Glomerular Filtration Rate (GFR) is a measure of kidney function, reflecting the volume of filtrate formed per minute in the kidneys. On average, GFR is approximately 125 mL/min in males and 105 mL/min in females. Maintaining a relatively constant GFR is essential for the kidneys to effectively regulate body fluid homeostasis and maintain extracellular stability.
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
5.4K
Glomerular Filtration: Net Filtration Pressure
8.0K
Glomerular filtration, a key process in the kidneys, is regulated by three main pressures: Glomerular blood hydrostatic pressure (GBHP), Capsular hydrostatic pressure (CHP), and Blood colloid osmotic pressure (BCOP).
GBHP, with an average value of 55 mmHg, promotes filtration by pushing water and solutes through the filtration membrane. This is balanced by two opposing forces: CHP, a "back pressure" exerted against the filtration membrane by fluid already in the capsular space and renal...
GBHP, with an average value of 55 mmHg, promotes filtration by pushing water and solutes through the filtration membrane. This is balanced by two opposing forces: CHP, a "back pressure" exerted against the filtration membrane by fluid already in the capsular space and renal...
8.0K
Renal Drug Excretion: Glomerular Filtration
1.3K
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
1.3K
Diabetes: Management and Pharmacotherapy
1.0K
The therapy for diabetes aims to alleviate hyperglycemia-related symptoms, prevent acute metabolic decompensation, and reduce chronic end-organ complications. Glycemic control is evaluated through short-term (self-monitoring, continuous glucose monitoring) and long-term (A1c, fructosamine) metrics, enabling near real-time tracking of blood glucose levels and reflecting glycemic control over specific time frames.
Insulin remains the cornerstone of treatment for most patients with type 1 and many...
Insulin remains the cornerstone of treatment for most patients with type 1 and many...
1.0K

