期刊
NEONATOLOGY
卷 92, 期 4, 页码 248-257出版社
KARGER
DOI: 10.1159/000103743
关键词
kernicterus; tissue culture; brainstem auditory evoked potentials; hyperbilirubinemia; jaundice; Gunn rat; free bilirubin
类别
资金
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS047151] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS [R01DC000369] Funding Source: NIH RePORTER
- NIDCD NIH HHS [R01 DC00369] Funding Source: Medline
- NINDS NIH HHS [R01 NS47151] Funding Source: Medline
Background: Bilirubin encephalopathy or kernicterus is a potentially serious complication of neonatal hyperbilirubinemia. The mechanism of bilirubin-induced neurotoxicity is not known. Many neurological insults are mediated through NMDA receptor activation. Objective: We assessed the effect of the NMDA channel antagonist, MK-801 on bilirubin neurotoxicity in vivo and in vitro. Methods: Bilirubin toxicity in vitro was assessed using trypan blue staining. Sulfadimethoxine injected ( i.p.) jaundiced Gunn rat pups exhibit many neurological sequelae observed in human hyperbilirubinemia. Brainstem auditory-evoked potentials ( BAEPs), a noninvasive sensitive tool to assess auditory dysfunction due to bilirubin neurotoxicity, were used to assess neuroprotection with MK-801 ( i.p.) in vivo. Results: In primary cultures of hippocampal neurons, 20 min exposure to 64: 32 mu M bilirubin: human serum albumin reduced the cell viability by approximately 50% ten hours later. MK-801 treatment did not protect the cells. MK-801 pretreatment doses ranging from 0.1-4.0 mg/kg did not protect against BAEP abnormalities in Gunn rat pups 6 h after sulfadimethoxine injection. Conclusion: Our findings suggest that bilirubin neurotoxicity is not mediated through NMDA receptor activation. Copyright (C) 2007 S. Karger AG, Basel.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据