Effects of elevated magnesium and substrate on neuronal numbers and neurite outgrowth of neural stem/progenitor cells in vitro.

Abstract:

:Because a potential treatment for brain injuries could be elevating magnesium ions (Mg(2+)) intracerebrally, we characterized the effects of elevating external Mg(2+) in cultures of neonatal murine brain-derived neural stem/progenitor cells (NSCs). Using a crystal violet assay, which avoids interference of Mg(2+) in the assay, it was determined that substrate influenced Mg(2+) effects on cell numbers. On uncoated plastic, elevating Mg(2+) levels to between 2.5 and 10mM above basal increased NSC numbers, and at higher concentrations numbers decreased to control or lower levels. Similar biphasic curves were observed with different plating densities, treatment durations and length of time in culture. When cells were plated on laminin-coated plastic, NSC numbers were higher even in basal medium and no further effects were observed with Mg(2+). NSC differentiation into neurons was not altered by either substrate or Mg(2+) supplementation. Some parameters of neurite outgrowth were increased by elevated Mg(2+) when NSCs differentiated into neurons on uncoated plastic. Differentiation on laminin resulted in increased neurites even in basal medium and no further effects were seen when Mg(2+) was elevated. This system can now be used to study the multiple mechanisms by which Mg(2+) influences neuronal biology.

journal_name

Neurosci Res

journal_title

Neuroscience research

authors

Vennemeyer JJ,Hopkins T,Kuhlmann J,Heineman WR,Pixley SK

doi

10.1016/j.neures.2014.05.001

subject

Has Abstract

pub_date

2014-07-01 00:00:00

pages

72-8

eissn

0168-0102

issn

1872-8111

pii

S0168-0102(14)00074-1

journal_volume

84

pub_type

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