Here, we aimed to study serum heat shock protein (HSP) 70 levels in diabetic patients with and without albuminuria. We performed a 1:1 matched case control study on 40 diabetic patients with albuminuria as cases and 40 age, sex, body mass index matched diabetic patients without albuminuria (normoalbuminuria) as controls. Normoalbuminuria was defined as urinary albumin excretion rate <15 mg/12 h, and albuminuria was defined as urinary albumin excretion rate between 100-400 mg/12 h. Patients with albuminuria had a higher HSP70 than controls (0.83±0.50 vs. 0.63±0.06; p= 0.02), while they did not differ in any other studied variables. In ten of the studied pairs, the controls had higher HSP70 levels than cases (reverse relationship). Patients in the "direct relationship group" had higher HbA1c values than the patients in the "reverse relationship group" (8.9±0.3 vs. 7.3±0.6, p=0.04). Cases in the reverse pairs had a lower low density lipoprotein cholesterol levels than their controls. The odds ratio of HSP70 in the prediction of albuminuria was (28.69 (3.2-250.1), p=0.002). In conclusion, we have shown an increased HSP70 levels in diabetic patients with albuminuria.
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