Developmental alcohol exposure leads to a persistent change on astrocyte secretome

Journal of Neurochemistry
Pablo TrindadeAlexandre E Medina

Abstract

Fetal alcohol spectrum disorder is the most common cause of mental disabilities in the western world. It has been quite established that acute alcohol exposure can dramatically affect astrocyte function. Because the effects of early alcohol exposure on cell physiology can persist into adulthood, we tested the hypothesis that ethanol exposure in ferrets during a period equivalent to the last months of human gestation leads to persistent changes in astrocyte secretome in vitro. Animals were treated with ethanol (3.5 g/kg) or saline between postnatal day (P)10-30. At P31, astrocyte cultures were made and cells were submitted to stable isotope labeling by amino acids. Twenty-four hour conditioned media of cells obtained from ethanol- or saline-treated animals (ET-CM or SAL-CM) were collected and analyzed by quantitative mass spectrometry in tandem with liquid chromatography. Here, we show that 65 out of 280 quantifiable proteins displayed significant differences comparing ET-CM to SAL-CM. Among the 59 proteins that were found to be reduced in ET-CM we observed components of the extracellular matrix such as laminin subunits α2, α4, β1, β2, and γ1 and the proteoglycans biglycan, heparan sulfate proteoglycan 2, and lumican. Proteins w...Continue Reading

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