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阿纳海姆消息:研究表明,切断心脏的血液供给会引起死亡,虽再恢复血液供给心脏也会受到损伤.自从直视心脏手术开展以来,“氧矛盾现象”的奥秘使科学家们困扰.新的资料表明,这种现象可能是由于心脏丧失了保护其免受氧毒性副产物的酶所致. 密执安医学院研究小组在美国实验生物学会联合会会议上报告,在心脏缺血期间氧代谢变为不正常,形成含氧的中毒分子,如过氧化物阴离子基和羟基。一般情况下,细胞能防御氧代谢物的毒性作用,但心脏缺血时破坏了细胞的保护作用.在兔
Anaheim News: Researchers have shown that cutting off the blood supply to the heart can cause death and causing damage to the heart even after resumption of blood supply. “The mysteries of the” oxymoron "have plagued scientists since the first direct-to-heart surgery began. Of the data shows that this phenomenon may be due to the loss of the heart to protect them from oxygen toxicity by-products caused by the enzyme. Michigan Medical School team at the American Society of Experimental Biology Federation meeting reported during ischemia Metabolism becomes abnormal and forms oxygenated toxic molecules such as peroxide anion and hydroxyl groups. In general, cells are able to protect against the toxic effects of oxygen metabolites, but the cardioprotection of cells is disrupted by ischemia in the rabbit