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- W2444630337 abstract "Following our previous studies on the biomolecular and biochemical aspects of the human tissue oxidative damage due to hypoxia, ischemia and reperfusion, aim of the present work is to evaluate the role played by oxyradical generation in the morphofunctional cellular injury. We evaluated the tissue levels of some metabolic markers (MDA, Catalase, Uric Acid) to obtain a pathogenic picture and then a therapeutic approach closely related to the cellular biodynamics.A skeletal muscle samples were taken during elective knee orthopedic surgery in 20 consecutive patients. The biopsies were taken in normoxic conditions and after 5 +/- 1 and 62 +/- 3 min form tourniquet application and finally 21 +/- 2 min following muscle reperfusion. The samples were assayed for tissue Malondialdeyade (MDA), uric acid and catalase (CAT) contents with HPLC and fluorimetric procedures. All data were evaluated in terms of computerized statistical analysis.When compared to normoxic tissue (1.24 +/- 0.26 nmoli.mg-1 protein), the MDA levels show a moderate increase in hypoxic (1.66 +/- 0.12) and ischemic tissue (1.78 +/- 0.13), while highly significant is the rise in reperfused muscle MDA content (5.94 +/- 0.15). The uric acid as far as CAT shows no appreciable alterations in hypoxia and ischemia. Following reoxygenation an increase in uric acid contents with a concomitant CAT tissue consumption appear evident.The obtained data seem to underline the cytoprotective role played by adaptive changes in the hypoxic and ischemic human cells. On the contrary, the rapid reoxygenation of the ischemic tissue appears to start oxyradical neo-generation. In clinical and therapeutic terms these observations underline a peculiar and different approach to the critically ill patient." @default.
- W2444630337 created "2016-06-24" @default.
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- W2444630337 date "2000-12-01" @default.
- W2444630337 modified "2023-09-23" @default.
- W2444630337 title "[Biochemical and metabolic aspects of oxyradical pathology in the hypoxic-ischemic reperfused human skeletal muscle tissue. Clinical markers and therapeutic approach]." @default.
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