THSD1 (Thrombospondin Type 1 Domain Containing Protein 1) is a novel nascent focal adhesion protein that functions as a positive regulator of focal adhesion assembly and endothelial cell attachment to the extracellular matrix 1. Mechanistically, THSD1 localizes to nascent adhesions alongside FAK, talin, and vinculin, where it promotes talin binding to FAK—a critical step in focal adhesion maturation 1. Additionally, THSD1 operates at the interface between endosome dynamics and focal adhesion assembly through clathrin-mediated endocytosis, which positively regulates its adhesion-promoting function 1. Recently, THSD1 was shown to suppress autophagy-mediated focal adhesion turnover by inhibiting Beclin 1 through FAK-dependent phosphorylation in brain endothelial cells 2. Clinically, THSD1 variants are implicated in intracranial aneurysms and subarachnoid hemorrhage, with patient-identified variants showing compromised focal adhesion assembly capacity 31. Loss-of-function THSD1 mutations cause non-immune hydrops fetalis with congenital cardiac defects and hemangiomas in an autosomal recessive inheritance pattern 4. Genome-wide Mendelian randomization analysis identified THSD1 as a potential druggable target for ischemic stroke prevention 5. The protein's role in cell adhesion mechanisms positions it as central to vascular disease pathophysiology.