Regulatory circuits that build and sustain noninfectious granulomas.

Regulatory circuits linking immune cells, metabolism, and stroma sustain noninfectious granulomas across diverse diseases, maintaining persistent tissue aggregates without pathogens.

• Why it matters: Persistent inflammation in granulomatous diseases disrupts tissue architecture and impairs organ function, highlighting the need to understand how these lesions are maintained beyond simple cytokine pathways.
• What they did: The study synthesizes recent research to propose that granulomas are maintained by interconnected regulatory circuits involving immune responses, metabolic processes, and stromal interactions, rather than linear inflammatory signals.
• The result: Identifying conserved and disease-specific regulatory programs offers potential strategies to dismantle established granulomas, improving therapeutic approaches for conditions like sarcoidosis.