This is similar to what was reported in a recent study by Li and colleagues showing that, in the vaginal microecology, the high expression of the enzyme prolyl aminopeptidase (specifically releasing the terminal proline residue from a peptide) in BV-associated bacteria could be substantially correlated to the occurrence and the development of vaginal inflammatory diseases (Li et al., 2024). The gene discussed is LAP3; the disease is bacterial vaginosis.