组织多形核中性粒细胞的女性特异性下调导致自身免疫性干眼病中调节性T细胞功能受损和效应性T细胞反应增强。

Female-Specific Downregulation of Tissue Polymorphonuclear Neutrophils Drives Impaired Regulatory T Cell and Amplified Effector T Cell Responses in Autoimmune Dry Eye Disease.

作者信息

Gao Yuan, Min Kyungji, Zhang Yibing, Su John, Greenwood Matthew, Gronert Karsten

机构信息

Vision Science Program, School of Optometry, University of California Berkeley, Berkeley, CA 94598.

Vision Science Program, School of Optometry, University of California Berkeley, Berkeley, CA 94598

出版信息

J Immunol. 2015 Oct 1;195(7):3086-99. doi: 10.4049/jimmunol.1500610. Epub 2015 Aug 31.

Abstract

Immune-driven dry eye disease primarily affects women; the cause for this sex-specific prevalence is unknown. Polymorphonuclear neutrophils (PMN) have distinct phenotypes that drive inflammation but also regulate lymphocytes and are the rate-limiting cell for generating anti-inflammatory lipoxin A4 (LXA4). Estrogen regulates the LXA4 circuit to induce delayed female-specific wound healing in the cornea. However, the role of PMNs in dry eye disease remains unexplored. We discovered an LXA4-producing tissue PMN population in the corneal limbus, lacrimal glands, and cervical lymph nodes of healthy male and female mice. These tissue PMNs, unlike inflammatory PMNs, expressed a highly amplified LXA4 circuit and were sex-specifically regulated during immune-driven dry eye disease. Desiccating stress in females, unlike in males, triggered a remarkable decrease in lymph node PMN and LXA4 formation that remained depressed during dry eye disease. Depressed lymph node PMN and LXA4 in females correlated with an increase in effector T cells (Th1 and Th17), a decrease in regulatory T cells (Treg), and increased dry eye pathogenesis. Ab depletion of tissue PMN abrogated LXA4 formation in lymph nodes, as well as caused a marked increase in Th1 and Th17 cells and a decrease in Tregs. To establish an immune-regulatory role for PMN-derived LXA4 in dry eye, females were treated with LXA4. LXA4 treatment markedly inhibited Th1 and Th17 and amplified Treg in draining lymph nodes, while reducing dry eye pathogenesis. These results identify female-specific regulation of LXA4-producing tissue PMN as a potential key factor in aberrant effector T cell activation and initiation of immune-driven dry eye disease.

摘要

免疫驱动的干眼病主要影响女性;这种性别特异性患病率的原因尚不清楚。多形核中性粒细胞(PMN)具有不同的表型,既能驱动炎症,也能调节淋巴细胞,并且是产生抗炎性脂氧素A4(LXA4)的限速细胞。雌激素调节LXA4通路,以诱导角膜中女性特异性的延迟伤口愈合。然而,PMN在干眼病中的作用仍未得到探索。我们在健康雄性和雌性小鼠的角膜缘、泪腺和颈部淋巴结中发现了一群产生LXA4的组织PMN。这些组织PMN与炎性PMN不同,表达高度放大的LXA4通路,并且在免疫驱动的干眼病期间受到性别特异性调节。与雄性不同,雌性的干燥应激会引发淋巴结PMN和LXA4形成的显著减少,在干眼病期间这种减少会持续存在。雌性中淋巴结PMN和LXA4的减少与效应T细胞(Th1和Th17)的增加、调节性T细胞(Treg)的减少以及干眼病发病机制的增加相关。组织PMN的抗体清除消除了淋巴结中LXA4的形成,同时导致Th1和Th17细胞显著增加以及Tregs减少。为了确定PMN衍生的LXA4在干眼中的免疫调节作用,对雌性小鼠进行了LXA4治疗。LXA4治疗显著抑制引流淋巴结中的Th1和Th17,并扩增Treg,同时减少干眼病发病机制。这些结果表明,产生LXA4的组织PMN的女性特异性调节是异常效应T细胞激活和免疫驱动的干眼病发病的潜在关键因素。

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