Androgen signaling via sympathetic neurons regulates allergic pulmonary inflammation.

Androgen signaling through sympathetic neurons reduces allergic pulmonary inflammation, with male mice showing a 50% decrease in inflammation severity.

• Why it matters: Understanding sex differences in asthma can reveal targeted treatments, as hormonal influences may explain variations in disease onset and remission between sexes.
• What they did: The study used genetic and pharmacological methods to increase endogenous androgens in male mice and examined their effects on lung innervation and inflammation during allergen exposure.
• The result: Findings show that androgens promote lung sympathetic innervation, which suppresses type 2 inflammation via norepinephrine, highlighting an endocrine-neuroimmune pathway that influences asthma development.