乳腺内皮质淋巴细胞和肠道输入塑造了乳腺发育中的T细胞动态
Abigail Jaquish1,2, Eleni Phung1, Xutong Gong3
1NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA, USA.
Nature immunology
|July 29, 2025
概括
怀孕大大增加了乳腺中的T细胞,类似于粘膜淋巴细胞. 这些细胞从肠道迁移,这表明它们在哺乳期将乳房转化为粘膜屏障中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生殖生物学 生殖生物学
背景情况:
- 怀孕导致乳腺在哺乳期发生显著的变化.
- 免疫细胞,特别是T细胞在这种重塑过程中的作用尚未完全理解.
研究的目的:
- 在怀孕和哺乳期间在乳腺内全面分析T细胞种群及其特征.
- 研究乳腺T细胞的起源和功能,探索它们与粘膜淋巴细胞的相似性.
主要方法:
- 乳腺T细胞的综合分析,包括CD4+,CD8+和TCRαβ+CD8αα+种群.
- 在乳腺上皮内对T细胞的定位研究.
- 研究微生物暗示依赖性和T细胞从肠道迁移的研究.
- T细胞受体 (TCR) 谱系分析,比较肠道和乳腺组织.
- 在母乳中识别潜在的人类对应物.
主要成果:
- 在怀孕和哺乳期间观察到CD4+和CD8+T效应细胞显著增加.
- 在乳腺上皮内发现了T细胞,类似于粘膜组织中的内皮性淋巴细胞 (IEL).
- 有证据表明,部分依赖于微生物线索和T细胞从肠道迁移到乳腺.
- 在肠道和乳腺组织之间确定了共享的TCR克隆类型,包括公共TCR家族.
- 在人类母乳中也发现了类似乳腺IEL的细胞.
结论:
- 乳腺T细胞,特别是IEL,在怀孕和哺乳期间经历显著扩张,并表现出粘膜组织的特征.
- 从肠道的T细胞迁移和微生物的影响似乎在乳腺免疫适应中起作用.
- 这些发现表明,乳腺IEL对于管理乳腺在乳腺生成过程中过渡到粘膜屏障至关重要.
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