Lung endothelial cells (MLECs) from knock-in mouse model with or without the causative HGPS LmnaG609G mutation

Vascular dysfunction is one of the typical characteristics of aging, but its contributing roles to systemic aging and the therapeutic potential is lacking experimental evidence. Accumulating data suggest that the mechanisms underlying aging are similar to those governing Hutchinson-Gilford progeria syndrome (HGPS), a premature aging disease, in which affected patients succumb to cardiovascular diseases (CVDs). Here, we generated a knock-in mouse model with the causative HGPS LmnaG609G mutation, called progerin. We crossed Lmnaf/f mice with a Tie2-Cre line to get Lmnaf/f;TC mice, which exhibit defective microvasculature and neovascularization, accelerated aging and shortened lifespan. Single-cell transcriptomic analysis of murine lung endothelial cells (MLECs) revealed a significant upregulation of inflammatory response. These data support endothelial dysfunction as a primary trigger of systemic aging and highlight gene therapy as a potential strategy for the clinical treatment of HGPS and age-related vascular dysfunction. Overall design: We isolated CD31+ MLECs from three pairs of LmnaG609G/G609G (G609G) and Lmnaf/f (Flox) mice by FACS