Hypertension Hormone Vasopressin Accelerates Cartilage Breakdown

Researchers have identified a mechanism by which the hormone vasopressin, often elevated in individuals with high blood pressure, contributes to the worsening of osteoarthritis. A study from South Korea indicates that vasopressin binds to specific receptors on cartilage cells, accelerating their breakdown.

The research team, from Chonnam National University and Inje University, analyzed data from a Korean health survey and found a correlation between hypertension and the severity of osteoarthritis. Experiments on mouse models of hypertension showed that elevated blood pressure led to a more rapid progression of joint disease.

Investigators observed that vasopressin, facilitated by an increased number of its receptors (AVPR1A) on aging or damaged cartilage, activates enzymes that degrade cartilage components while diminishing substances vital for cartilage maintenance. When the researchers removed the specific receptor in mice, cartilage damage associated with hypertension significantly reduced.

Further experiments involved blocking the vasopressin signaling pathway using compounds like Relcovaptan, which led to decreased joint damage in animal models. The team is now pursuing preclinical studies to evaluate this approach as a potential therapy for osteoarthritis, suggesting that conditions like hypertension may need to be considered in managing the disease.