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The Anti-Aging Protein Klotho Enhances Remyelination Following Cuprizone-Induced Demyelination.

Abstract
The current study examined whether overexpression of Klotho (KL) in transgenic mice can enhance remyelination following cuprizone-induced demyelination and improves the clinical outcome in experimental autoimmune encephalomyelitis (EAE). Demyelination was achieved by feeding transgenic mice overexpressing the transmembrane form of Klotho (KL-OE) and wild-type (WT) littermates cuprizone-containing chow for 6 weeks. The animals were then allowed to remyelinate for 3 weeks. Paraphenylenediamine staining and platelets-derived growth factor receptor α (PDGFRα) and glutathione S-transferase pi (GSTpi) immunohistochemistry were performed on corpus callosum (CC) sections for quantification of myelin and progenitor and mature oligodendrocytes, respectively. The EAE model was induced with the MOG35-55 peptide. The animals were scored daily for clinical symptoms for 30 days. Following 6 weeks of demyelination, both KL-OE mice and WT littermates demonstrated almost complete and comparable demyelination of the CC. However, the level of spontaneous remyelination was increased approximately two-fold in KL-OE mice, although no significant differences in the numbers of PDGFRα and GSTpi-positive cells were observed. Following EAE induction, Klotho overexpression did not affect the clinical scores, likely due to the different roles Klotho plays in the brain and spinal cord. Thus, increasing Klotho expression should be considered as a therapy for enhancing remyelination in the brains of individuals with multiple sclerosis.
AuthorsElla Zeldich, Ci-Di Chen, Robin Avila, Satish Medicetty, Carmela R Abraham
JournalJournal of molecular neuroscience : MN (J Mol Neurosci) Vol. 57 Issue 2 Pg. 185-96 (Oct 2015) ISSN: 1559-1166 [Electronic] United States
PMID26067431 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Monoamine Oxidase Inhibitors
  • Cuprizone
  • Glutathione S-Transferase pi
  • Gstp1 protein, mouse
  • Receptor, Platelet-Derived Growth Factor alpha
  • Glucuronidase
  • Klotho Proteins
Topics
  • Animals
  • Corpus Callosum (drug effects, metabolism, pathology)
  • Cuprizone (toxicity)
  • Encephalomyelitis, Autoimmune, Experimental (genetics, metabolism)
  • Glucuronidase (genetics, metabolism)
  • Glutathione S-Transferase pi (genetics, metabolism)
  • Klotho Proteins
  • Mice
  • Mice, Inbred C57BL
  • Monoamine Oxidase Inhibitors (toxicity)
  • Myelin Sheath (genetics, metabolism)
  • Oligodendroglia (metabolism, pathology)
  • Receptor, Platelet-Derived Growth Factor alpha (genetics, metabolism)

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