Dysregulated thymus-ovary axis promotes virtual memory T cell polarization to aggravate PMOS pathology.

Androgen-induced thymic involution promotes virtual memory CD8+ T cell expansion, aggravating ovarian inflammation in PMOS models.

• Why it matters: Understanding the mechanisms behind ovarian inflammation in PMOS is crucial, as the disease is traditionally linked only to reproductive hormone dysfunction, leaving the role of other organs unclear.
• What they did: The study used mouse models and patient samples to show that androgen receptor signaling in thymic stromal cells causes early thymic involution, leading to increased virtual memory CD8+ T cells that accumulate in reproductive tissues.
• The result: Virtual memory CD8+ T cells exacerbate ovarian inflammation by secreting cytokines and recruiting myeloid cells, and JAK inhibition can reduce their differentiation and improve disease outcomes.