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PEROKSINITRIT ve MYOKARDIYUM

2012 
OZET Nitrik oksit (NO) kalpte endokardda, koroner endotelinde ve miyositlerde sentez edilir. NO hizla superoksit radikal ile reaksiyona girerek potent oksidan peroksinitrit (ONOO") olusturur. ONOO" miyokardda negatif inotropik etki gosterir ve hasara sebep olur. ONOO"'nun yuksek konsantrasyonlari protein, lipit, karbonhidrat, nukleik asit ve bazi diger biyomolekulleri okside edebilmektedir. ONOO 'nun inflamasyon, ateroskleros, iskemi-reperfuzyon injury'si, sepsis ve adult respiratuar distres sendromu gibi bir cok hastaliklarin patofizyolojilerinde rol oynadigi ve klinik pratikte peroksinitrit temizleyicilerindeki gelismelerin yeni tedavi yaklasimlarina yol acabilecegi dusunulmektedir. Anahtar Kelimeler: Peroksinitrit, myokardiyum SUMMARY PEROXYNITRITE AND MYOCARDIUM In the heart, NO is synthesized in endocardium, coronarry endothelium and cardiac myocytes. NO reacts rapidly with superoxide radical and forms potent oxidant peroxynitrite(ONOO"). ONOO" shows negative inotropic effect on myocardium and causes myocardial injury. High concentration of ONOO" is capable of oxidizing proteins, lipds, carbohydrates, nucleic acids and other biomoecules. ONOO" has been implicated in the pathophysiology of a variety of diseases including inflammation, atheroslerosis, ischemia-reperfusion injury, sepsis and acute respiratory distress syndrome and in the clinical practise, development of peroxynitrite scavengers may provide new therapeutic approaches. Key Words: Peroxynitrite, myocardium
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