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0This research examines the transformative effects of CD19-CAR T cell therapy on patients with systemic sclerosis (SSc), a severe autoimmune disease marked by debilitating skin fibrosis and vascular damage. Utilizing advanced deep phenotyping techniques like spatial transcriptomics (cISH) and imaging mass cytometry (IMC), the study demonstrates that the treatment can actually regenerate complex skin structures, such as dermal papillae, which were previously considered permanently lost. Analysis of skin biopsies reveals a profound shift in fibroblast populations, moving from a disease-associated pro-fibrotic state toward a healthy, physiological profile. Furthermore, the data indicates significant vascular repair and functional improvements in epidermal cells, coinciding with a reduction in clinical skin thickness scores. These findings suggest that deep B cell depletion not only halts disease progression but may also facilitate the active restoration of diseased tissue architecture. Thus, the research highlights the powerful potential of CAR T cell technology as a regenerative strategy for treating incurable fibrotic conditions.
References:
Rius Rigau A, Xu M, Liu Z, et al. Deep phenotyping of skin tissue remodeling in patients with systemic sclerosis treated with CD19-CAR T cells[J]. Nature Communications, 2026.
