Electroretinographic Abnormalities and Sex Differences Detected with Mesopic Adaptation in a Mouse Model of Schizophrenia: A and B Wave Analysis

被引：4

作者：

Jimenez, Nathalia Torres ^{[1
,2
,3
]}

Lines, Justin W. ^{[1
,2
]}

Kueppers, Rachel B. ^{[3
]}

Kofuji, Paulo ^{[1
,2
]}

Wei, Henry ^{[2
]}

Rankila, Amy ^{[2
]}

Coyle, Joseph T. ^{[4
]}

Miller, Robert F. ^{[1
,2
,3
]}

McLoon, Linda K. ^{[1
,2
,3
]}

机构：

[1] Univ Minnesota, Grad Program Neurosci, Minneapolis, MN 55455 USA

[2] Univ Minnesota, Dept Neurosci, Minneapolis, MN 55455 USA

[3] Univ Minnesota, Dept Ophthalmol & Visual Neurosci, Room 374 Lions Res Bldg,2001 6th St SE, Minneapolis, MN 55455 USA

[4] Harvard Med Sch, Dept Psychiat, Belmont, MA USA

来源：

INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE | 2020年 / 61卷 / 02期

基金：

美国国家卫生研究院;

关键词：

electroretinogram; schizophrenia; NMDA receptor; biomarker; mice; a-wave; b-wave; mesopic; AMINO-ACID OXIDASE; D-SERINE; OSCILLATORY POTENTIALS; GENDER-DIFFERENCES; NEGATIVE SYMPTOMS; D-CYCLOSERINE; RACEMASE; LIGHT; RETINA; BRAIN;

D O I：

10.1167/iovs.61.2.16

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

PURPOSE. Mesopic flash electroretinography (fERG) as a tool to identify N-methyl-D-aspartate receptor (NMDAR) hypofunction in subjects with schizophrenia shows great potential. We report the first fERG study in a genetic mouse model of schizophrenia characterized by NMDAR hypofunction from gene silencing of serine racemase (SR) expression (SR-/-), an established risk gene for schizophrenia. We analyzed fERG parameters under various background light adaptations to determine the most significant variables to allow for early identification of people at risk for schizophrenia, prior to onset of psychosis. SR is a risk gene for schizophrenia, and negative and cognitive symptoms antedate the onset of psychosis that is required for diagnosis. METHODS. The scotopic, photopic, and mesopic fERGs were analyzed in male and female mice in both SR-/- and wild-type (WT) mice and also analyzed for sex differences. Amplitude and implicit time of the a- and b-wave components, b-/a-wave ratio, and Fourier transform analysis were analyzed. RESULTS. Mesopic a- and b-wave implicit times were significantly delayed, and b-wave amplitudes, b/a ratios, and Fourier transform were significantly decreased in the male SR-/- mice compared to WT, but not in female SR-/- mice. No significant differences were observed in photopic or scotopic fERGs between genotype. CONCLUSIONS. The fERG prognostic capability may be improved by examination of background light adaptation, a larger array of light intensities, considering sex as a variable, and performing Fourier transform analyses of all waveforms. This should improve the ability to differentiate between controls and subjects with schizophrenia characterized by NMDAR hypofunction.

引用

页数：16

共 89 条

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