Melatonin prevents the injury-induced decline of Akt/forkhead transcription factors phosphorylation

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Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway
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Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway

Published on: August 23, 2024

Phil-Ok Koh1

  • 1Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, Jinju, South Korea. pokoh@gsnu.ac.kr

Journal of Pineal Research
|March 4, 2008
PubMed

Insights

Melatonin reduces brain injury by activating Akt and inhibiting cell death. This study shows melatonin enhances the interaction between FKHR and 14-3-3, mediating neuroprotection after stroke.

Area of Science:

  • Neuroscience
  • Biochemistry

Background:

  • Melatonin is known for its neuroprotective effects against brain injury.
  • Its mechanism involves Akt activation and inhibition of apoptotic cell death.

Purpose of the Study:

  • To investigate melatonin's modulation of anti-apoptotic signals.
  • To examine the role of Akt and its downstream targets (FKHR, AFX, 14-3-3) in melatonin-induced neuroprotection.

Main Methods:

  • Adult male rats underwent middle cerebral artery occlusion (MCAO) after melatonin treatment.
  • Brain tissues were analyzed 24 hours post-MCAO using Western blot.
  • Key proteins like PDK1, Akt, FKHR, and AFX phosphorylation were measured.

Main Results:

  • Melatonin significantly reduced infarct volume and TUNEL-positive cells.
  • It prevented injury-induced reductions in phosphorylated PDK1, Akt, FKHR, and AFX.
  • Melatonin increased the interaction between phosphorylated FKHR and 14-3-3, without altering 14-3-3 levels.

Conclusions:

  • Melatonin exerts potent neuroprotection against brain injury.
  • Akt activation and FKHR phosphorylation are key mediators of melatonin's protective effects.
  • The enhanced interaction between pFKHR and 14-3-3 contributes to melatonin's anti-apoptotic signaling.

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