第八因子主要来源于肝脏内内皮细胞的解剖学上不同的子集
Paige E Patterson1, Audrey Kapelanski-Lamoureux2, Cynthia Lebeaupin3
1Indiana University, Indianapolis, Indiana, United States.
Blood advances
|February 3, 2026
概括
凝血因子VIII (FVIII) 主要来源于肝脏的鼻状内皮细胞 (LSEC),而不是肝细胞. 这一发现澄清了FVIII生产地点,并为血友病A基因治疗策略提供了信息.
科学领域:
- 血液学 血液学 血液学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 凝血因子VIII (FVIII) 的细胞起源,对于血液静止至关重要,已经争论了几十年.
- 之前的研究提出肝细胞或肝脏阴侧内皮细胞 (LSEC) 是FVIII的主要来源,影响血友病A (HA) 研究和治疗.
- 方法上的局限性和相互矛盾的报道阻碍了对FVIII生物合成的最终理解.
研究的目的:
- 使用一种新的基因编辑记者小鼠模型,人性化的小鼠和人类组织,明确地绘制FVIII生产的细胞起源.
- 为了研究肝叶内FVIII表达的微解剖分布.
- 通过识别自然的FVIII生物合成部位,为优化血友病A的基因疗法提供见解.
主要方法:
- 开发和利用一种新的基因编辑F8促进者-报告者小鼠模型.
- 对人类化小鼠和人类肝脏组织样本的分析.
- 在肝叶内产生FVIII细胞的微解剖学映射.
主要成果:
- FVIII主要由肝脏的鼻状内皮细胞 (LSEC) 合成,而不是肝细胞.
- 在脏内皮细胞中也检测到FVIII的产生.
- 在肝脏区域2和3内的LSEC中观察到FVIII表达的明显区域模式,在区域1中表达最小,在小鼠和人类中一致.
- 这种区域表达模式甚至在存在脂肪肝炎的情况下也存在.
结论:
- 肝脏的鼻状内皮细胞 (LSEC) 是 VIII 凝血因子的主要来源.
- FVIII表达在肝叶内表现出显著的微异质性,主要局限于2和3区.
- 这些发现为开发更有效的血友病A基因疗法提供了关键的见解,通过向内源性FVIII生产地点.
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