Resumo

EMIR, Izzet; SULEYMAN, Zeynep  e  SULEYMAN, Halis. Effect of thiamine pyrophosphate on oxidative damage in the brain and heart of rats with experimentally induced occlusion of the common carotid artery. Invest. clín [online]. 2024, vol.65, n.2, pp.220-229.  Epub 06-Jun-2024. ISSN 2477-9393.  https://doi.org/10.54817/ic.v65n2a08.

It is known that a sudden increase in cerebral blood flow (hyper perfusion) with carotid revascularisation may disrupt and damage the blood brain barrier. This study aimed to explore thiamine pyrophosphate’s (TPP) protective effects against potential brain and heart damage resulting from carotid cross-clamping and unclamping in rats. The animals were divided into common carotid cross-clamping and unclamping (CCU), TPP+common carotid cross-clamping and unclamping (TCCU), and sham operation (SG) groups. The TCCU group received an intraperitoneal injection (IP) of 20 mg/kg TPP one hour before anesthesia. The CCU and SG groups received distilled water as a solvent. Ischemia was induced by maintaining the clips closed for 10 min. For the SG group, only a subcutaneous incision was made. Afterward, the clips were removed, the incisions were stitched, and reperfusion was continued for six hours. Subsequently, the rats were euthanized with high-dosage general anesthesia, and heart and brain tissues were removed. TPP significantly suppressed the I/R-induced malondialdehyde (MDA) increase and decreased total glutathione (tGSH) levels in brain and heart tissues. TPP prevented the increase of tumor necrosis factor-alpha (TNF-α), interleukin-1 β (IL -1β), and interleukin-6 (IL -6) levels in both brain and heart tissues. In blood serum, TPP suppressed I/R-induced increase in troponin I (TP I) and creatine kinase-MB (CK-MB) in the blood. TPP was shown to protect the brain and distant cardiac tissues against oxidative and inflammatory damage induced by cerebral I/R.

Palavras-chave : carotid artery; ıschemia; occlusion; rat; reperfusion; thiamine pyrophosphate.

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