在人类产前肺部发育过程中,VEGF-A异型诱导内皮细胞中APLN的表达
Antony Hoarau1, Andrew Frauenpreis1, Randa Belgacemi1
1Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, United States.
Frontiers in cell and developmental biology
|February 9, 2026
概括
人类VEGF-A异型对肺毛细血管发育的影响不同于小鼠. 虽然一些异构体在内皮细胞上调APLN表达,但CAP2分化是一个复杂的过程,涉及多个因素.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 单细胞RNA测序确定了两种人类肺毛细血管细胞类型:CAP1和CAP2.
- 鼠标研究表明,胚胎发育期间的VEGF-A拼接对于肺毛细血管形成至关重要.
- 鼠VEGF-A188异型在体外促进了CAP2的出现,但人类VEGF-A异型的作用尚不清楚.
研究的目的:
- 调查VEGF-A及其异型在产前发育期间人类肺毛细血管分化的作用.
- 为了将VEGF-A异型表达与人类胎儿肺部CAP2标志物出现的相关性.
- 确定不同人体VEGF-A异型对内皮细胞增殖和CAP2标志物表达的影响.
主要方法:
- 对人类产前肺组织 (10-20周怀孕) 分析CAP2标记物和VEGF-A异型.
- RT-qPCR用于评估表达模式.
- 用重组VEGF-A异型来治疗肺部扩张的治疗,以研究对内皮细胞 (EC) 的影响.
- 光 in situ 杂交,以确认细胞特异性的表达变化.
主要成果:
- 某些VEGF-A异型与CAP2标记物共同表达,在妊娠18-20周左右达到峰值.
- 大多数VEGF-A异型在EC上调节APLN表达,这是一个关键的CAP2标志物.
- VEGF-A189降低了EC的扩散;其他异构体的影响最小.
- 异构体对其他CAP2标记物有差异性影响,降低EDNRB和HPGD的调节,但不影响SOSTDC1或TBX2.
结论:
- 与小鼠同类相比,人类VEGF-A异型对肺毛细血管分化有明显的影响.
- VEGF-A异型可以诱导人类肺部EC中的APLN表达.
- CAP2分化是一个多因素的过程,不仅仅依赖于VEGF-A.
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