Oligodendrocyte Response to Pathophysiological Conditions Triggered by Episode of Perinatal Hypoxia-Ischemia: Role of IGF-1 Secretion by Glial Cells.

Molecular Neurobiology
Justyna JanowskaJoanna Sypecka

Abstract

Differentiation of oligodendrocyte progenitors towards myelinating cells is influenced by a plethora of exogenous instructive signals. Insulin-like growth factor 1 (IGF-1) is one of the major factors regulating cell survival, proliferation, and maturation. Recently, there is an ever growing recognition concerning the role of autocrine/paracrine IGF-1 signaling in brain development and metabolism. Since oligodendrocyte functioning is altered after the neonatal hypoxic-ischemic (HI) insult, a question arises if the injury exerts any influence on the IGF-1 secreted by neural cells and how possibly the change in IGF-1 concentration affects oligodendrocyte growth. To quantify the secretory activity of neonatal glial cells, the step-wise approach by sequentially using the in vivo, ex vivo, and in vitro models of perinatal asphyxia was applied. A comparison of the results of in vivo and ex vivo studies allowed evaluating the role of autocrine/paracrine IGF-1 signaling. Accordingly, astroglia were indicated to be the main local source of IGF-1 in the developing brain, and the factor secretion was shown to be significantly upregulated during the first 24 h after the hypoxic-ischemic insult. And conversely, the IGF-1 amounts released by ...Continue Reading

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Citations

Sep 24, 2020·International Journal of Molecular Sciences·Yuji UenoNobutaka Hattori
Oct 30, 2020·Frontiers in Neuroscience·Xiaotong ZhangXiaomin Zhang
Mar 14, 2021·Journal of Perinatology : Official Journal of the California Perinatal Association·Ryan M McAdams, Megan W Berube
Jul 20, 2021·Experimental Neurology·Lixiao XuBin Sun

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Methods Mentioned

BETA
dissection
protein assay
ELISA

Software Mentioned

NeuronJ
GraphPad PRISM
ImageJ
Sholl

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