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PEDIATRICS Vol. 106 No. 6 December 2000, pp. 1447-1451

Role of Carbon Monoxide and Nitric Oxide in Newborn Infants With Postasphyxial Hypoxic-Ischemic Encephalopathy

Received Dec 9, 1999; accepted Apr 17, 2000.

Yuan Shi, Feng Pan, Huaqiang Li, Jie Pan, Shiwen Qin, and Chikao Shen

From the Department of Pediatrics, Research Institute of Surgery and Daping Hospital, Third Military Medical University, Chongqing, China.

Objective.  To investigate the role of carbon monoxide (CO) and nitric oxide (NO) in the pathogenesis of neonatal hypoxic-ischemic encephalopathy (HIE).

Methods.  Plasma CO and NO levels were studied in 33 asphyxiated term neonates, and 30 healthy neonates served as controls.

Results.  Among the 33 asphyxiated term neonates, plasma CO and NO levels in 28 neonates with HIE were significantly higher than those in the 5 infants without HIE and in the normal controls. The plasma CO and NO levels in the newborn infants with HIE stage 3 were found to be significantly higher than those in the neonates with HIE stage 1 and 2. Moreover, plasma CO and NO levels were significantly increased in neonates with brain damage and adverse outcome as compared with those in patients with normal neuroimaging and normal outcome.

Conclusion.  Plasma CO and NO levels after perinatal asphyxia are related to the severity of neonatal HIE, brain damage, and neurologic outcome. The present study suggests that CO and NO might play important roles in the pathogenesis of neonatal HIE.  Key words:  heme oxygenase, cerebral ischemia, cerebral anoxia.


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