Nat Med:VEGF-Ab抗体可降低心血管疾病患者截肢风险

2014-11-07 佚名 生物谷

项新的研究表明,一种控制新血管生长的蛋白质,可能降低心血管疾病对患者腿的影响,心血管疾病会导致患者腿部溃疡,坏疽和截肢。 英国诺丁汉大学研究人员关注于信号蛋白血管内皮生长因子(Vascular Endothelial Growth Factor, VEGF)在外周动脉疾病(PAD)所扮演的角色。研究发现,不同于其他人,动脉疾病患者没有产生正确形式血管内皮生长因子,正确形式血管内皮生长因子对

项新的研究表明,一种控制新血管生长的蛋白质,可能降低心血管疾病对患者腿的影响,心血管疾病会导致患者腿部溃疡,坏疽和截肢。

英国诺丁汉大学研究人员关注于信号蛋白血管内皮生长因子(Vascular Endothelial Growth Factor, VEGF)在外周动脉疾病(PAD)所扮演的角色。研究发现,不同于其他人,动脉疾病患者没有产生正确形式血管内皮生长因子,正确形式血管内皮生长因子对于刺激腿部新血管生长是必需的。PAD是腿截肢的最常见的原因之一,股动脉有脂肪沉积积聚,导致局部缺血或血流阻塞。在最严重的情况下,腿组织开始死亡(被称为坏疽),小腿可能需要截肢。

这项新的研究发表在著名学术期刊Nature Medicine上,研究发现有些病人可能有较高的截肢风险,因为他们产生的血管内皮生长因子的种类,是阻止血管增长,而不是刺激血管。

Bates教授说:PAD是一种非常常见的疾病,但并不是所有患者会表现出症状,研究发现PAD患者腿部血管已经有堵塞。然而,在许多情况下,已经阻塞的动脉周围将会有其它血管进行补偿性生长。

在许多患者,特别是那些患有糖尿病,我们没有看到血管再生长。同时那些PAD患者是难以治疗的,有时甚至需要截肢。血管内皮生长因子有两种形式:促血管生成VEGF(VEGF-Aa),其刺激新血管和血管生成;抗VEGF(VEGF-Ab),其抑制新血管发育。该研究还表明,通过给予肥胖和糖尿病小鼠针对VEGF-Ab的抗体,VEGF-Ab抑制血管发育的效应被阻断,研究人员正在开发可用于人类的类似抗体。

该抗体或许可用于治疗PAD患者,直到新的血管在他们的腿重新长出。高水平的促血管发生形式VEGF也可能与疼痛增加,肿瘤的生长和肾脏疾病相关联。为此,研究人员正在研究他们是否能够将血细胞本身内VEGF的生成从抗血管生成形式转换成促血管生成形式,同时不影响其在身体其他部位的表达。

Shannon Amoils博士说:这项重要的研究,发现了用于治疗外周动脉疾病可能的新靶标,这个靶标可能被操纵以帮助改善缺血肢体的血液供应,降低截肢的机率。

原始出处

Kikuchi R1, Nakamura K2, MacLauchlan S2, Ngo DT3, Shimizu I2, Fuster JJ2, Katanasaka Y2, Yoshida S2, Qiu Y4, Yamaguchi TP5, Matsushita T6, Murohara T7, Gokce N3, Bates DO8, Hamburg NM9, Walsh K2.An antiangiogenic isoform of VEGF-A contributes to impaired vascularization in peripheral artery disease.Nat Med. 2014 Nov 2

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    2015-01-15 liye789132251
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