Cited by 18Cancer-related cognitive impairment studiesNeurogenesis and neuroplasticity mechanismsGlioma Diagnosis and Treatment

MEK1/2 Inhibition Suppresses Tamoxifen Toxicity on CNS Glial Progenitor Cells

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Chen, Hsing-Yu, Yang, Yin Miranda, Han, Ruolan, Noble, Mark·2013·The Journal of Neuroscience

Abstract

It is increasingly apparent that treatment with a variety of anticancer agents often is associated with adverse neurological consequences. Clinical studies indicate that exposure even to tamoxifen (TMX), a putatively benign antihormonal agent widely used in breast cancer treatment, causes cognitive dysfunction and changes in CNS metabolism, hippocampal volume, and brain structure. We found that TMX is toxic for a variety of CNS cell populations in vitro and also increased cell death in the corpus callosum and reduced cell division in the mouse subventricular zone, the hippocampal dentate gyrus, and the corpus callosum. We further discovered that MEK1/2 inhibition selectively rescued primary glial progenitors from TMX toxicity in vitro while enhancing TMX effects on MCF7 luminal human breast cancer cells.In vivo, MEK1/2 inhibition prevented TMX-induced cell death in systemically treated mice. Our results demonstrate unexpected cytotoxicity of this putatively benign antihormonal agent and offer a potential strategy for rescuing CNS cells from adverse effects of TMX.

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Crossref · 10.1523/jneurosci.2729-13.2013

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  • This was accompanied by reduction in their proliferation, and that of neural progenitors in SVZ and dentate gyrus.

    “This was accompanied by a reduction in their proliferation, and that of neural progenitors in the subventricular zone and dentate gyrus”

    From Tamoxifen induces cellular stress in the nervous system by inhibiting cholesterol synthesis (2015) · cites this paper as [7]

    The Results section on systemic tamoxifen treatment reports reduced O-2A/OPC division in vitro and significantly suppressed cell division in the mouse subventricular zone and dentate gyrus. It does not identify the dividing cells in those two regions as neural progenitors; the Discussion says the affected precursor populations remain to be defined. Page numbers are not available in our copy. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • In one study, TAM was associated with loss of glial progenitor cells in the corpus callosum and with reduced cell division in neurogenic regions of the CNS.

    “although in one study it was associated with a loss of glial progenitor cells in the corpus callosum and with reduced cell division in neurogenic regions of the CNS [7].”
  • Previous investigation revealed loss of OPCs in corpus callosum at therapeutic TAM doses.

    “A previous investigation of TAM-induced toxicity at therapeutic doses in the brain revealed a loss of oligodendrocyte progenitor cells (OPCs) in the corpus callosum [7].”
  • OPC loss was prevented both in vitro and in vivo by MEK1/2 inhibition.

    “OPC loss was prevented both in vitro and in vivo by MEK1/2 inhibition”

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Authors
Chen, H.-Y., Yang, Y. M., Han, R., & Noble, M.
Affiliations
University of Rochester Medicine (US)
Venue
The Journal of Neuroscience
Published
2013-09-18
Volume
33
Issue
38
Pages
15069-15074
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1995548102
Cited by
18
References
42
Citations by year
2024: 3 · 2023: 1 · 2022: 3 · 2018: 2 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 2
FWCI
1.90
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense (W81XWH)
  • National Institutes of Health (W81XWH)
  • National Cancer Institute (R01CA131385, CA131385)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cancer-related cognitive impairment studies
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Genetics › Glioma Diagnosis and Treatment
Keywords
tamoxifen, MEK1/2 inhibition, glial progenitor cells, neurotoxicity, cognitive impairment, breast cancer treatment side effects, subventricular zone, dentate gyrus, corpus callosum, cell death
MeSH terms
Animals, Benzimidazoles, Breast Neoplasms, Cell Count, Cells, Cultured, Central Nervous System, Enzyme Inhibitors, Estrogen Antagonists, Female, Humans, Mice, Inbred CBA, Neuroglia, Stem Cells, Tamoxifen, Receptors, Platelet-Derived Growth Factor, In Situ Nick-End Labeling, MAP Kinase Kinase 1, Mice

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