Effectiveness of myo-inositol oxygenase in the early diagnosis of experimental acute kidney injury.

Objectives: The effectiveness of the myo-inositol oxygenase (MIOX) enzyme was investigated in the diagnosis of acute kidney injury (AKI).

Methods: In total, 40 rats were divided into 5 groups (n = 8, for each group) while left kidney ischemia-reperfusion was implemented in groups 2, 3, 4 and 5. Group 1 was the control group. Group 2 underwent 1‑hour ischemia and 2‑hour reperfusion. Group 3 underwent 1‑hour ischemia and 4‑hour reperfusion. Group 4 underwent 2‑hour ischemia and 2‑hour reperfusion. Group 5 underwent 2‑hour ischemia and 4‑hour reperfusion.

Results: Serum creatinine and blood urea nitrogen levels in all ischemia-reperfusion groups were higher than in the control group (p<0.001). Serum MIOX level was higher in groups 2, 3 and 4 than in group 1 (p=0.002). Tissue MIOX level was lower in groups 2, 4, and 5 than in group 1 (p=0.039). Serum and tissue neutrophil gelatinase-associated lipocalin levels were not significantly different between the groups. The injury level in histopathologic examination was as follows: group 1
Conclusion: The serum MIOX level increases in the early stages of AKI, however, decreases subsequently. Therefore, the serum MIOX may be a potential promising biomarker in the early diagnosis of AKI (Tab. 5, Fig. 6, Ref. 30).