Testosterone Reduces Myelin Abnormalities in the Wobbler Mouse Model of Amyotrophic Lateral Sclerosis - Archive ouverte HAL Access content directly
Journal Articles Biomolecules Year : 2024

Testosterone Reduces Myelin Abnormalities in the Wobbler Mouse Model of Amyotrophic Lateral Sclerosis

Ivan Esperante
Maria Meyer
  • Function : Author
Carolina Banzan
  • Function : Author
Maria Sol Kruse
  • Function : Author
Analia Lima
  • Function : Author
Paulina Roig
  • Function : Author
Michael Schumacher
Alejandro de Nicola
Maria Claudia Gonzalez Deniselle

Abstract

Amyotrophic lateral sclerosis (ALS) is a fatal motoneuron degenerative disease that is associated with demyelination. The Wobbler (WR) mouse exhibits motoneuron degeneration, gliosis and myelin deterioration in the cervical spinal cord. Since male WRs display low testosterone (T) levels in the nervous system, we investigated if T modified myelin-relative parameters in WRs in the absence or presence of the aromatase inhibitor, anastrozole (A). We studied myelin by using luxol-fast-blue (LFB) staining, semithin sections, electron microscopy and myelin protein expression, density of IBA1+ microglia and mRNA expression of inflammatory factors, and the glutamatergic parameters glutamine synthetase (GS) and the transporter GLT1. Controls and WR + T showed higher LFB, MBP and PLP staining, lower g-ratios and compact myelin than WRs and WR + T + A, and groups showing the rupture of myelin lamellae. WRs showed increased IBA1+ cells and mRNA for CD11b and inflammatory factors (IL-18, TLR4, TNFαR1 and P2Y12R) vs. controls or WR + T. IBA1+ cells, and CD11b were not reduced in WR + T + A, but inflammatory factors’ mRNA remained low. A reduction of GS+ cells and GLT-1 immunoreactivity was observed in WRs and WR + T + A vs. controls and WR + T. Clinically, WR + T but not WR + T + A showed enhanced muscle mass, grip strength and reduced paw abnormalities. Therefore, T effects involve myelin protection, a finding of potential clinical translation.

Domains

Neuroscience

Dates and versions

hal-04530011 , version 1 (02-04-2024)

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Ivan Esperante, Maria Meyer, Carolina Banzan, Maria Sol Kruse, Analia Lima, et al.. Testosterone Reduces Myelin Abnormalities in the Wobbler Mouse Model of Amyotrophic Lateral Sclerosis. Biomolecules, 2024, 14 (4), pp.428. ⟨10.3390/biom14040428⟩. ⟨hal-04530011⟩
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