1H magnetic resonance spectroscopy reveals neuronal injury in a simian immunodeficiency virus macaque model.

1H magnetic resonance spectroscopy reveals neuronal injury in a simian immunodeficiency virus macaque model.
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1H 磁共振波谱揭示了猿猴免疫缺陷病毒猕猴模型中的神经元损伤。

DOI:
10.1097/00042560-199705010-00004
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发表时间:
1997
期刊:
Journal of acquired immune deficiency syndromes and human retrovirology : official publication of the International Retrovirology Association
影响因子:
--
通讯作者:
González,RG
González,RG
中科院分区:
--
文献类型:
--
作者:
Tracey,I;Lane,J;Chang,I;Navia,B;Lackner,A;González,RG

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人类免疫缺陷病毒(HIV)感染通常会导致称为艾滋病痴呆综合症的神经系统疾病。在HIV大脑中发现了神经元损失和损伤,但其潜在机制尚不清楚。猴免疫缺陷病毒(SIV)感染的猕猴是一个很好的艾滋病毒感染的动物模型,但神经元的损失尚未得到证实。为了确定SIV脑中是否发生神经元损伤,我们使用质子磁共振波谱(1H-MRS)对对照组和SIV感染猕猴的脑提取物中的神经元标记物N-乙酰天冬氨酸(NAA)进行定量,并将这些结果与组织学分析相关联。我们发现SIV感染动物与对照组相比,NAA减少(2.94±1.37对6.21±1.73 μmol/g湿重; p= 0.004)。在接种SIV mac Ynef后9或10天在感染急性期处死的SIV感染动物中也发现NAA显著降低。我们的结论是恒河猴SIV感染的结果是可证明感染后不久,神经元损伤,1 H-MRS可用于测量这种损伤。这些结果进一步支持SIV猕猴作为研究HIV神经发病机制的有用模型。
Infection with human immunodeficiency virus (HIV) commonly results in neurologic disease called the AIDS dementia complex. Neuronal loss and injury have been found in the HIV brain, but the underlying mechanisms are not understood. The simian immunodeficiency virus (SIV)–infected macaque is an excellent animal model for HIV infection, but neuronal loss has not been demonstrated. To determine whether neuronal damage occurs in the SIV brain, we quantified the neuronal markerN-acetylaspartate (NAA) using proton magnetic resonance spectroscopy (1 H-MRS) in brain extracts of control and SIV-infected macaques and correlated these findings with histologic analyses. We found reduced NAA in the SIV-infected animals compared with controls (2.94±1.37 versus 6.21±1.73 µmol/g of wet weight; p= 0.004). A significant decrease in NAA was also found in SIV-infected animals sacrificed in the acute stages of infection 9 or 10 days after inoculation with SIV mac Ynef. We conclude that SIV infection of rhesus macaques results in neuronal damage that is demonstrable shortly after infection and that 1 H-MRS may be used to measure such injury. The results further support the SIV macaque as a useful model to study the mechanisms of neuropathogenesis by HIV.
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