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心脏外原生细胞在移植的人类心脏中重新填充了大多数主要细胞类型
Elina Minami1, Michael A Laflamme, Jeffrey E Saffitz
1Division of Cardiology, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA.
Circulation
|November 9, 2005
概括
心脏外原生细胞在移植后重新填充心脏细胞,其中内皮细胞显示出最高的整合. 这种早期和广泛的内皮嵌合症可能会影响移植体的健康和排斥.
科学领域:
- 心血管生物学 心血管生物学
- 移植免疫学 移植免疫学
- 干细胞生物学 干细胞生物学
背景情况:
- 心脏外原生细胞可以在受伤后融入心脏,但它们在人类心脏移植中的范围尚不清楚.
- 以前的研究表明,这些细胞对心肌细胞的重新填充有限.
研究的目的:
- 为了研究人类心脏移植中内皮质,光滑肌肉和施万细胞嵌合的程度.
- 为了比较不同细胞类型和血管大小的嵌合体水平.
主要方法:
- 来自心脏移植受体的尸检和内心肌瘤活检样本的分析.
- 对于内皮细胞 (CD31),光滑肌肉 (α-actin) 和施万 (S-100) 细胞的免疫组织化学.
- Y染色体在位杂交以识别性别不匹配的移植中来自捐赠者的细胞.
主要成果:
- 内皮细胞表现出最高的心脏外化学反应 (24.3%),其次是施万细胞 (11.2%) 和血管光滑肌细胞 (3.4%).
- 对心肌细胞 (0.04%) 的化学反应水平明显高于此前观察到的水平.
- 移植后1个月就检测到高内皮质奇默症,持续长达10年,在微循环中更为普遍.
结论:
- 心脏外原生细胞以不同的频率重新填充各种心脏细胞类型.
- 早期对内皮原体的招募表明了移植相关损伤的作用.
- 较高的内皮嵌合症可能会影响心肌排斥和移植血管病变.
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