Blood:VWF的肝素结合结构域可结合生长因子促进新生血管形成

2019-04-13 MedSci MedSci原创

中心点:VWF的肝素结合结构域可与生长因子结合。在伤口愈合过程中,VWF的肝素结合结构域与生长因子协同促血管生成。摘要:在伤口愈合过程中,生长因子(GFs)通过结合创面微环境中的细胞外基质成分,调控其分布、有效性和信号传导。细胞外基质蛋白可通过结合GFs调节血管生成、促进伤口愈合。血管内皮细胞(ECs)在血浆和内皮下基质中释放的止血蛋白血管假性血友病因子(VWF)可调节血管生成;这种功能与VWF缺

中心点:

VWF的肝素结合结构域可与生长因子结合。

在伤口愈合过程中,VWF的肝素结合结构域与生长因子协同促血管生成。

摘要:

在伤口愈合过程中,生长因子(GFs)通过结合创面微环境中的细胞外基质成分,调控其分布、有效性和信号传导。细胞外基质蛋白可通过结合GFs调节血管生成、促进伤口愈合。

血管内皮细胞(ECs)在血浆和内皮下基质中释放的止血蛋白血管假性血友病因子(VWF)可调节血管生成;这种功能与VWF缺乏或功能障碍的患者的血管畸形相关。

Jun Ishihara等人发现小鼠VWF缺陷可导致伤口愈合延迟,同时伴随伤口中的血管形成减少、促血管形成的GFs减少。研究人员发现体外VWF与多种GFs结合,包括血管内皮生长因子(VEGF)-A亚型和血小板衍生的生长因子(PDGF)-BB,主要是通过VWF A1结构域中的肝素结合结构域(HBD)。在人类血浆中,VWF还可与VEGF-A和FGF-2结合;在EC中,VWF还可与VEGF-A共定位。

VWF A1-HBD与纤维蛋白基质结合后可隔离并缓慢释放结合的GFs。在VWF缺陷的小鼠体内,VWF A1-HBD功能化的纤维蛋白基质可增强血管形成和GF滞留。采用VEGF-A165和PDGF-BB联合VWF A1-HBD功能化的纤维蛋白基质治疗糖尿病小鼠的慢性皮肤损伤可加速伤口愈合、增加血管生成和平滑肌细胞增殖。

总而言之,VWF A1-HBD可作为GFs的储蓄池,促进有效的血管生成和组织再生。

原始出处:

Jun Ishihara, et al. The heparin binding domain of von Willebrand factor binds to growth factors and promotes angiogenesis in wound healing. Blood 2019 :blood.2019000510; doi: https://doi.org/10.1182/blood.2019000510 

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    2019-05-16 gjsgj
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    2019-04-15 sunmin0219
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中心点:帕纳替尼疗法可导致VWF介导的血小板黏附至微血管内皮细胞。帕纳替尼依赖性的微血管病变可降低节段性的LV功能异常。摘要:第三代酪氨酸激酶抑制剂(TKI)帕纳替尼可有效治疗耐药性慢性粒细胞白血病,但急性缺血事件发生率高,限制了其临床应用。而且,造成这些事件的病理生理机制尚不明确。Yllka Latifi等人推测帕纳替尼可引发一种血管内皮病,涉及内皮相关的血管性血友病因子(VWF)过量和继发性血