Abstract
Both the extracellular matrix molecule tenascin-C (Tn-C) and tissue inhibitors of metalloproteinases (TIMPs) have a role in tissue injury, inflammation, and remodeling. In this pilot study, we tried to evaluate the role of these markers in acute kidney injury (AKI). A total of 52 subjects were enrolled in this study. Group 1 consisted of 27 patients with AKI (stage 1, 2, and 3), and Group 2 consisted of 25 age- and gender-matched healthy subjects. Serum and urine samples (to determine Tn-C and TIMP-1) were obtained from the participants at the beginning of the study. Second samples were obtained from Group 1 patients when renal function improved (at discharge). Serum TIMP-1 concentrations (admission and discharge) were higher in Group 1 than Group 2 (p = 0.0001 for both comparisons). Tn-C excretion in spot urine was significantly higher in healthy controls than at the admission levels of the patient group (p = 0.036). However, TIMP-1 excretion in spot urine was lower in healthy controls than in admission and discharge levels of the patient group (p = 0.0001 for both comparisons). Our results show that these biomarkers (especially TIMP-1) may have a role in the pathophysiology of AKI. Further studies are needed in this field.
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