Abstract
The guinea pig is a frequently used animal model for human pregnancy complications, such as oxygen deprivation or hypoxia, which result in altered brain development. To investigate the impact of in utero chronic hypoxia on brain development, pregnant guinea pigs underwent either normoxic or hypoxic conditions at about 70 % of 65-day term gestation. After delivery, neurochemical profiles consisting of 19 metabolites and macromolecules were obtained from the neonatal cortex, hippocampus, and striatum from birth to 12 weeks postpartum using in vivo 1H MR spectroscopy at 9.4 T. The effects of chronic fetal hypoxia on the neurochemical profiles were particularly significant at birth. However, the overall developmental trends of neurochemical concentration changes were similar between normoxic and hypoxic animals. Alterations of neurochemicals including N-acetylaspartate (NAA), phosphorylethanolamine, creatine, phosphocreatine, and myo-inositol indicate neuronal loss, delayed myelination, and altered brain energetics due to chronic fetal hypoxia. These observed neurochemical alterations in the developing brain may provide insights into hypoxia-induced brain pathology, neurodevelopmental compromise, and potential neuroprotective measures.
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Acknowledgments
This study was partly supported by the Public Health Service (R01 HL049041-13; CPW), Centers for Disease Control and Prevention (DP00187-5; CPW), and the National Institute of Child Health and Human Development (R03 HD062734; YD). The Hoglund Brain Imaging Center is supported by a generous gift from Forrest and Sally Hoglund and funding from the National Institutes of Health (P30 HD002528).
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This article is a part of 40th Year of Neurochemical Research Special issue (Neurochem Res (2016) 41:1–2).
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Wang, WT., Lee, P., Dong, Y. et al. In Vivo Neurochemical Characterization of Developing Guinea Pigs and the Effect of Chronic Fetal Hypoxia. Neurochem Res 41, 1831–1843 (2016). https://doi.org/10.1007/s11064-016-1924-y
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DOI: https://doi.org/10.1007/s11064-016-1924-y