Women’s Health and Pulmonary Vascular Disease

In a recent study conducted by Laura Stourm et al., the authors identified that patients with pulmonary hypertension (PH) harboring loss-of-function variants in the Filamin A (FLNA) gene exhibit a unique spectrum of phenotypes. These include pulmonary involvement with lung parenchymal abnormalities and emphysema, as well as a range of extrapulmonary manifestations such as dysmorphic facial features, epilepsy, congenital heart defects, valvular and aortic diseases, thrombocytopenia, and periventricular nodular heterotopia (PVNH).

Female sex increases risk of Group I pulmonary arterial hypertension by roughly threefold, but the mechanism is unclear. Low expression of Cyp1b1, an enzyme that metabolizes estrogens, is associated with disease penetrance, particularly in women. We previously found that lower Pparγ levels in murine PAH models, which may drive disease, are rescued by estrogen blockade.

This study aimed to explore the potential causal link between genetic predisposition to various connective tissue diseases (CTDs), namely systemic lupus erythematosus (SLE), Sjögren's syndrome (SS), polymyositis (PM), dermatomyositis (DM), systemic sclerosis (SSc), mixed connective tissue disease (MCTD), and rheumatoid arthritis (RA), and the incidence of pulmonary arterial hypertension (PAH) utilizing Mendelian randomization (MR).