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Melatonin modulates neuronal mitochondria function during normal ageing in mice.

A J Idowu1, S L Kumar, B Yidong

  • 1Department of Physiology, Lagos State University College of Medicine, 1-5 Oba Akinjobi Way, GRA, Ikeja, PMB 21266, Ikeja, Lagos, Nigeria. abimbola.idowu@lasucom.edu.ng.

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Melatonin treatment improved cell viability and mitochondrial function in aged brain cells. This suggests melatonin could be a therapeutic agent for age-related mitochondrial dysfunction and disease.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Mitochondrial Biology

Background:

  • Mitochondrial dysfunction is linked to normal aging and increased susceptibility to age-related diseases.
  • The growing elderly population necessitates effective therapies for age-related conditions.

Purpose of the Study:

  • To assess the impact of melatonin on mitochondrial function in young, middle-aged, and old neuronal cybrids.
  • To evaluate melatonin as a potential therapeutic intervention for age-related mitochondrial dysfunction.

Main Methods:

  • Generated synaptosomal mitochondria-bearing cybrids from mouse brain cortical cells.
  • Cultured cybrids in galactose media to assess oxidative phosphorylation and ATP production.
  • Treated cybrids with varying melatonin concentrations (500µM and 1mM).
  • Measured cell viability, mitochondrial membrane potential (MMP), reactive oxygen species (ROS) levels, and ATP production.
  • Utilized light and fluorescence microscopy to observe cellular structural integrity.

Main Results:

  • Melatonin (500µM and 1mM) significantly increased cell viability in young, middle-aged, and old cybrids.
  • Melatonin altered mitochondrial membrane potential (MMP) differently across age groups, increasing it in middle-aged and old cybrids.
  • Reactive oxygen species (ROS) levels were reduced by melatonin in middle-aged and old cybrids.
  • ATP production significantly increased in middle-aged and old cybrids treated with melatonin.
  • Untreated middle-aged and old cybrids exhibited structural damage and cell death.

Conclusions:

  • Melatonin demonstrates therapeutic potential in mitigating age-related neuronal mitochondrial dysfunction.
  • Melatonin treatment can improve cellular health and function in aging neuronal cells.
  • Further research into melatonin as an intervention for age-related diseases is warranted.