MKI67 and acute kidney injury: Compared to the AKI group, the percentage of proliferating cells was restored after treatment with EVs alone (9.7 ± 3.35% vs. 2.01 ± 1.21% Ki67+, p < 0.05) or pFUS alone (8.77 ± 2.45% vs. 2.01 ± 1.21% Ki67+, p < 0.05), and the combined pFUS + EV treatment showed the greatest effect (14.67 ± 3.20% vs. 2.01 ± 1.21% Ki67+, p < 0.05), significantly more than either treatment alone.