{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T18:59:20Z","timestamp":1790189960338,"version":"4.1.0"},"reference-count":47,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"10","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["ATVB"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND:<\/jats:title>\n                    <jats:p>The vascular system is the largest organ in the body and underlies most chronic diseases, yet the molecular mechanisms that govern its plasticity remain poorly defined.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS:<\/jats:title>\n                    <jats:p>We applied single-cell proteomics in vascular disease, integrating it with single-cell transcriptomics to map protein regulation in healthy and Marfan syndrome aortas.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS:<\/jats:title>\n                    <jats:p>This approach uncovered cell type\u2013specific and cell state\u2013specific proteins missed at the transcriptional level. Notably, we identified a decoupling of fibrillin-1 RNA and protein abundance, suggesting altered protein regulation as a potential contributor to aortic degeneration. Single-cell proteomics further resolved modulated smooth muscle cell states enriched for matrix effectors (AEBP1 [adipocyte enhancer binding protein 1], HTRA1 [high-temperature requirement A serine peptidase 1], FN1 [fibronectin 1]) and uniquely protein-level regulators (GLIPR2 [GLI pathogenesis\u2013related 2], ITGB2 [integrin beta-2], and CD151 [cluster of differentiation 151 antigen]).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS:<\/jats:title>\n                    <jats:p>Together, these findings establish the human single-cell proteomic atlas of the aorta, reveal altered FBN1 (fibrillin-1) protein regulation in both human and mouse Marfan syndrome, and position single-cell proteomics as a transformative framework for decoding vascular plasticity and identifying actionable effectors in disease.<\/jats:p>\n                  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