HDAC4 and acute kidney injury: Unspecified rats, in 5 groups. Five groups of rats, number per group not explicitly mentioned:1. Control (Ctrl).2. BBR-treated group (no CI-AKI).3. CI-AKI group.4. CI-AKI + BBR group.5. CI-AKI + Tasq (HDAC4 inhibitor) group.