When microbial biofilms build kidney stones.

Corynebacterium glucuronolyticum-like bacteria promote calcium oxalate kidney stone formation by degrading hippuric acid and facilitating crystal aggregation.

• Why it matters: Understanding specific microbial functions involved in kidney stone formation can lead to targeted interventions, moving beyond the concept of general microbiome imbalance.
• What they did: Qi et al. identified these bacteria as urinary pathobionts and demonstrated their role in promoting crystallization through two mechanisms: hippuric acid degradation and biofilm-mediated crystal aggregation.
• The result: This work suggests that targeting these microbial functions could offer new strategies for preventing or treating calcium oxalate kidney stones.