Division of Rheumatology, Department of Medicine, NYU Langone Health, New York, NY 10016, USA.
NYU Psoriatic Arthritis Center, NYU Langone Health, New York, NY 10016, USA.
Sci Immunol. 2023 Jun 8;8(84):eabq7991. doi: 10.1126/sciimmunol.abq7991. Epub 2023 Jun 2.
Whereas the cellular and molecular features of human inflammatory skin diseases are well characterized, their tissue context and systemic impact remain poorly understood. We thus profiled human psoriasis (PsO) as a prototypic immune-mediated condition with a high predilection for extracutaneous involvement. Spatial transcriptomics (ST) analyses of 25 healthy, active lesion, and clinically uninvolved skin biopsies and integration with public single-cell transcriptomics data revealed marked differences in immune microniches between healthy and inflamed skin. Tissue-scale cartography further identified core disease features across all active lesions, including the emergence of an inflamed suprabasal epidermal state and the presence of B lymphocytes in lesional skin. Both lesional and distal nonlesional samples were stratified by skin disease severity and not by the presence of systemic disease. This segregation was driven by macrophage-, fibroblast-, and lymphatic-enriched spatial regions with gene signatures associated with metabolic dysfunction. Together, these findings suggest that mild and severe forms of PsO have distinct molecular features and that severe PsO may profoundly alter the cellular and metabolic composition of distal unaffected skin sites. In addition, our study provides a valuable resource for the research community to study spatial gene organization of healthy and inflamed human skin.
虽然人类炎症性皮肤疾病的细胞和分子特征已经得到很好的描述,但它们的组织背景和系统影响仍知之甚少。因此,我们将银屑病(PsO)作为一种具有高度皮肤外受累倾向的典型免疫介导疾病进行了分析。对 25 例健康、活动性皮损和无临床受累的皮肤活检进行空间转录组学(ST)分析,并与公共单细胞转录组学数据进行整合,揭示了健康和炎症皮肤之间免疫微环境的显著差异。组织尺度图谱进一步确定了所有活动性皮损的核心疾病特征,包括炎症性基底上层表皮状态的出现和皮损皮肤中 B 淋巴细胞的存在。皮损和非皮损的样本均根据皮肤疾病的严重程度进行分层,而不是根据系统性疾病的存在进行分层。这种分离是由富含巨噬细胞、成纤维细胞和淋巴管的空间区域驱动的,其基因特征与代谢功能障碍有关。总之,这些发现表明轻度和重度银屑病具有不同的分子特征,重度银屑病可能会深刻改变远端未受影响皮肤部位的细胞和代谢组成。此外,我们的研究为研究社区提供了一个有价值的资源,用于研究健康和炎症人类皮肤的空间基因组织。
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