Pharmacological up-regulation of CALM1 restore endothelial cells in intracranial aneurysm pathogenesis
Zheng, D.; Liu, Y.; Zhao, L.; Leng, B.; Sun, Q.; Wang, B.; Qin, X.; Bian, L.; Zheng, Y.
Show abstract
Subarachnoid hemorrhage (SAH) resulted from intracranial aneurysm (IA) rupture is an especially severe form of stroke. Endothelial dysfunction represents the initiating event of IA pathogenesis. Understanding the role of endothelial cells (ECs) underlying formation of IAs is helpful to seek for pharmaceutical treatment strategy. Based on single-cell RNA sequencing, proteomics, and metabolic analysis, we discovered a change in cell population in IA samples, majorly in ECs and macrophages (MPs). Abnormal ECs exhibit senescence and death in IA samples, which is absent in the control arterial samples. Cross-analysis of multi-omics revealed that CALM1, a calcium detector involved in mechanotransduction, is downregulated in the abnormal ECs. CALM1 knockdown leads to senescence and inhibits the proliferation and maturation of ECs under turbulent flow. Through high-throughput virtual screening, this work identified compound ZC04329651 as a potent CALM1 activator in maintaining the stability of endothelial cell junctions and attenuating cellular senescence. Thus, our findings showed compound ZC04329651 up-regulate the expression of CALM1 to restore ECs, which maybe a promising pharmacological treatment strategy for IAs.
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