nervous system
• mice show a transient delay in oligodendrocytes (OL) maturation and myelination: cells expressing Myrf protein (an OL maturity marker) in transverse spinal cord sections are reduced to 56% of controls at P7, with similar decreases noted in cells expressing myelin genes Mbp and Plp1 and Gstpi protein; at P30 only a slight reduction in Gstpi numbers is still observed, whereas no differences in all other differentiation markers and myelin genes are detected at P30 or P60
• however, overall numbers of Sox10+ oligodendroglial cells (OGCs), Pdgfra+ oligodendrocyte progenitor cells (OPCs), Gfap+ astrocytes, and Iba1+ microglia are not significantly changed in the spinal cord at P1-P60
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• cells expressing myelin genes Mbp and Plp1 and Gstpi protein are significantly reduced in transverse spinal cord sections at P7; however, only a slight reduction in Gstpi numbers is still observed at P30
• analyses of spinal cord white matter regions showed an increased g-ratio and a drastically reduced number of myelinated axons at P7 but not at P30, indicating a transient delay in the myelination of axons in early postnatal stages
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• mice show strongly reduced expression of myelin genes in the spinal cord at P7
• in vitro, RNA-Seq analyses of primary OGC cultures derived from P0-P3 forebrains show significant downregulation of myelination-related genes, consistent with the delayed oligodendrocyte differentiation and hypomyelination phenotype seen in vivo
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homeostasis/metabolism
• RNA-Seq analyses of primary OGC cultures derived from P0-P3 forebrains show significant downregulation of genes associated with fatty acid, cholesterol and sphingomyelin biosynthesis
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