関連する実験動画
Updated: Jul 13, 2026

11:35
Decellularization and Recellularization Methodology for Human Saphenous Veins
Published on: July 27, 2018
循環する血管原生細胞に対するシロリムスの強力な抑制作用
Daiju Fukuda1, Masataka Sata, Kimie Tanaka
1Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo, Japan.
Circulation
|February 16, 2005
まとめ
シロリムス放出ステントは,循環する滑らかな筋肉の原始細胞を阻害することによって,ステント内静止症を予防します. しかし,シロリムスはステント移植後の再エンドセリア化を阻害することもあります.
科学分野:
- 心血管研究 循環器科の研究
- 血管生物学 血管生物学
- 薬理学 薬理学とは
背景:
- ネオインティマル・ハイパープラジアは,インステント・レステノシス (ISR) の主要な原因です.
- シロリムス放出ステント (SES) はISRを予防する有望な効果を示しているが,そのメカニズムは不明である.
- 循環する原始細胞は,ネオインティマルの形成に関与しています.
研究 の 目的:
- シロリムスがISRを防ぐメカニズムを調査する.
- 循環する原始細胞に対するシロリムスの効果を決定する.
主な方法:
- 健康なボランティアから単核細胞 (MNC) を分離した.
- 培養されたMNCは,滑らかな筋肉 (SM) のような細胞と内皮細胞のような細胞を誘導します.
- 培養細胞と損傷したマウスの股関節動脈にシロリムスを投与した.
主要な成果:
- シロリムスは,多国籍企業からのSM型の細胞増殖を強力に抑制しました.
- シロリムスは,マウスモデルにおけるネオインティマル・ハイパープラジアを減少させた.
- シロリムスは,損傷における骨髄由来SM型および血液形成細胞を減少させた.
- シロリムスは,治療された動脈における再エンドセリア化を遅らせました.
結論:
- シロリムスが循環する滑らかな筋肉の原始細胞を阻害することは,SESの有効性に寄与する可能性があります.
- シロリムスは,ステント移植後の再エンドセリア化に悪影響を及ぼす可能性があります.
関連する概念動画
Blood Flow
Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
Structure of Blood Vessels
Blood is circulated throughout the human body through a network of blood vessels called the circulatory system. This system includes arteries that transport blood from the heart to various body parts. These arterial pathways divide into smaller vessels until they reach the arterioles, which further split into capillaries. It is within these minuscule capillaries that the exchange of nutrients and waste products takes place. After this exchange, the blood is collected by venules, which fuse to...
Capillaries and Their Types
Capillaries, a crucial constituent of the circulatory system, are diminutive vessels with a diameter between 5–10 micrometers, accommodating perfusion to the tissues through the phenomenon known as microcirculation. Through their permeable walls, consisting of an endothelial layer ensconced by a basement membrane and sporadically dispersed smooth muscle fibers, the exchange of substances between the blood and the interstitial fluid becomes plausible. Variance in wall composition exists, with...
Autoregulation of Blood Flow
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation.
Development of Blood Vessels
The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...

