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  • Title: Dexmedetomidine on renal ischemia-reperfusion injury in rats: assessment by means of NGAL and histology.
    Author: de Carvalho AL, Vital RB, Kakuda CM, Braz JR, Castiglia YM, Braz LG, Módolo MP, Ribeiro OR, Domingues MA, Módolo NS.
    Journal: Ren Fail; 2015 Apr; 37(3):526-30. PubMed ID: 25613736.
    Abstract:
    BACKGROUND: Ischemic acute kidney injury is a common occurrence in the perioperative period and in critical patients admitted to intensive care units. The reestablishment of blood supply may worsen injury through the ischemia-reperfusion (I/R) mechanism. We investigated the effect of dexmedetomidine on the kidneys of rats subjected to an experimental I/R model. METHODS: 34 rats anesthetized with isoflurane was undergone right nephrectomy and randomly assigned to four groups: Control C (saline solution); Dexmedetomidine D (dexmedetomidine); Sham S (saline solution); Sham with Dexmedetomidine SD (dexmedetomidine). The serum levels of neutrophil gelatinase-associated lipocalin (NGAL) were measured at time-points T1 (following stabilization), T2 (ischemia), T3 (reperfusion), T4 (12 h after of I/R). The kidneys were subjected to histological examination. RESULTS: The NGAL levels were significantly higher at T4 compared with T1. Upon histological examination, the left kidneys in groups C and D exhibited a similar extent of cell injury. CONCLUSION: The levels of NGAL did not indicate either protection against or worsening of kidney injury. Histological examination for acute tubular necrosis showed that dexmedetomidine did not protect the kidneys from I/R.
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