miR-216b and miR-499 were interacted with cyb561d23′-untranslated regions (3′-UTR).
miR-216b and miR-499 were downregulated upon stimulation of fipronil.
The ectopic expression of miR-216b and miR-499 could regulate cyb561d2.
miR-216b and miR-499 could be considered as potential biomarker for fipronil toxicity.