生分解性ポリエステルから作製されたナノファイバー状エレクトロスピニングパッチは効果的な止血を提供する
Prathamesh Mane1,2, Avanti Pandit2, Mahdi Zafari1,2
1Department of Bioengineering, Interdisciplinary Science and Engineering Center, Northeastern University, 805 Columbus Ave, Boston, MA, 02120, USA.
Advanced healthcare materials
|December 26, 2025
まとめ
カルボン酸または第一級アミン基を有する新規エレクトロスピニングパッチ(EP)は、効果的に出血を止める。これらの止血用EPは、より速い凝固と組織接着を促進することにより、動物モデルにおいて従来のガーゼよりも優れた性能を発揮する。
科学分野:
- 生体材料科学
- 化学工学
- 止血研究
背景:
- 制御不能な出血は、予防可能な死亡の主な原因である。
- 現在の外用止血材には、合併症やトレーニングの必要性などの限界がある。
- 現在の止血材では、化学構造と止血特性の関係の理解が不足している。
研究 の 目的:
- 特定の官能基を有する新規止血用エレクトロスピニングパッチ(EP)を設計およびテストすること。
- カルボン酸(-COOH)および第一級アミン(-NH2)基を有するEPの促凝固効果を評価すること。
- EPと従来の止血方法との性能を比較すること。
主な方法:
- -COOHおよび-NH2基で官能化されたエレクトロスピニングパッチの作製。
- 凝固促進を評価するためのinvitro全血凝固アッセイ。
- 出血制御および創傷閉鎖を評価するためのマウス肝臓出血モデルを用いたinvivo試験。
主要な成果:
- EPはinvitroで全血凝固を著しく加速し、特に-COOH EPは優れた性能を示した。
- invivoでは、EPは綿ガーゼと比較して出血時間を約3分の1に短縮した。
- -COOH EPは、-NH2 EPおよびガーゼと比較して、凝固媒介性の組織接着および創傷閉鎖を強化した。
結論:
- 官能化されたエレクトロスピニングパッチは、外用止血に有望な新しいアプローチを提供する。
- -COOH官能化は、創傷閉鎖を改善するための凝固効率と組織接着の両方を強化する。
- EPは、効果的な凝固形成と接着を促進することにより、従来の止血方法よりも優れた代替手段を提供する。
関連する概念動画
Antihypertensive Drugs: Vasodilators
Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Antianginal Drugs: Nitrates and β-Blockers
In cardiovascular health, antianginal drugs combat angina pectoris — a condition marked by chest pain owing to diminished blood flow to the heart.
Organic nitrates, such as nitroglycerin, play a pivotal role. Once metabolized, they liberate nitric oxide, a molecular marvel. Nitric oxide triggers guanylyl cyclase and augments cGMP production. This biochemical cascade orchestrates the relaxation of vascular smooth muscles, ushering in vasodilation and enhancing coronary blood flow. Administered...
Organic nitrates, such as nitroglycerin, play a pivotal role. Once metabolized, they liberate nitric oxide, a molecular marvel. Nitric oxide triggers guanylyl cyclase and augments cGMP production. This biochemical cascade orchestrates the relaxation of vascular smooth muscles, ushering in vasodilation and enhancing coronary blood flow. Administered...
Vascular Spasm
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
Formation of the Platelet Plug
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...


