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자료유형
학술저널
저자정보
Ren Jian (International Neuroscience Institute) Xiao Xiao (Chinese Academy of Medical Sciences and Peking Union Medical College) Li Ruofei (Chinese Academy of Medical Sciences and Peking Union Medical College) Lv Cheng (Chinese Academy of Medical Sciences and Peking Union Medical College) Zhang Yu (Chinese Academy of Medical Sciences and Peking Union Medical College) Wang Leiming (International Neuroscience Institute) Hong Tao (International Neuroscience Institute) Zhang Hongqi (International Neuroscience Institute) Wang Yibo (Chinese Academy of Medical Sciences and Peking Union Medical College)
저널정보
대한생화학·분자생물학회 Experimental and Molecular Medicine Experimental and Molecular Medicine 제55권
발행연도
2023.3
수록면
628 - 642 (15page)
DOI
10.1038/s12276-023-00962-w

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Cavernous malformations (CMs) invading the central nervous system occur in ~0.16–0.4% of the general population, often resulting in hemorrhages and focal neurological deficits. Further understanding of disease mechanisms and therapeutic strategies requires a deeper knowledge of CMs in humans. Herein, we performed single-cell RNA sequencing (scRNA-seq) analysis on unselected viable cells from twelve human CM samples and three control samples. A total of 112,670 high-quality cells were clustered into 11 major cell types, which shared a number of common features in CMs harboring different genetic mutations. A new EC subpopulation marked with PLVAP was uniquely identified in lesions. The cellular ligand‒receptor network revealed that the PLVAP-positive EC subcluster was the strongest contributor to the ANGPT and VEGF signaling pathways in all cell types. The PI3K/AKT/mTOR pathway was strongly activated in the PLVAP-positive subcluster even in non-PIK3CA mutation carriers. Moreover, endothelial-to-mesenchymal transition (EndMT) cells were identified for the first time in CMs at the single-cell level, which was accompanied by strong immune activation. The transcription factor SPI1 was predicted to be a novel key driver of EndMT, which was confirmed by in vitro and in vivo studies. A specific fibroblast-like phenotype was more prevalent in lesion smooth muscle cells, hinting at the role of vessel reconstructions and repairs in CMs, and we also confirmed that TWIST1 could induce SMC phenotypic switching in vitro and in vivo. Our results provide novel insights into the pathomechanism decryption and further precise therapy of CMs.

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