Morin attenuates acrylamide-induced testicular toxicity in rats by regulating the NF-κB, Bax/Bcl-2 and PI3K/Akt/mTOR signaling pathways

Life Sci. 2020 Nov 15:261:118301. doi: 10.1016/j.lfs.2020.118301. Epub 2020 Aug 20.

Abstract

Aim: Acrylamide (AC) is a carcinogenic substance which is formed during the heating of starchy foods at high temperatures and constitutes an important risk for human health. Therefore, reducing the detrimental effects of AC has become an important research topic. This study was performed to evaluate the protective effect of morin against the testicular toxicity induced by AC in male rats.

Materials and methods: Testicular damage was evaluated after the rats were treated orally with AC (38.27 mg/kg body weight) alone or with morin (50 and 100 mg/kg body weight) for 10 consecutive days.

Key findings: Our results showed that treatment with morin could significantly decrease MDA level and considerably increase the activity of antioxidant enzymes (SOD, CAT, GPx) and GSH level in the testicular tissue of the AC-treated rats. Morin supplementation also suppressed the activation of inflammatory, apoptotic and autophagic pathways by increasing Bcl-2 and decreasing p38α MAPK, TNF-α, NF-κB, IL-1β, IL-6, COX-2, cytochrome c, Bax, caspase-3, LC3A, LC3B and beclin-1 protein levels. Morin also alleviated the side effects caused by AC by regulating the PI3K/Akt/mTOR signaling pathway.

Significance: Collectively, our results have shown the possible protective mechanism of morin, a potential therapeutic agent for AC-induced testicular toxicity.

Keywords: Acrylamide; Apoptosis; Inflammation; Morin; Oxidative stress; Testicular toxicity.

MeSH terms

  • Acrylamide / toxicity*
  • Animals
  • Antioxidants / metabolism
  • Dose-Response Relationship, Drug
  • Flavonoids / administration & dosage
  • Flavonoids / pharmacology*
  • Male
  • NF-kappa B / metabolism*
  • Phosphatidylinositol 3-Kinase / metabolism
  • Proto-Oncogene Proteins c-akt / metabolism
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • Rats
  • Rats, Sprague-Dawley
  • Signal Transduction / drug effects
  • TOR Serine-Threonine Kinases / metabolism
  • Testis / drug effects
  • Testis / pathology*
  • bcl-2-Associated X Protein / metabolism

Substances

  • Antioxidants
  • Bax protein, rat
  • Bcl2 protein, rat
  • Flavonoids
  • NF-kappa B
  • Proto-Oncogene Proteins c-bcl-2
  • bcl-2-Associated X Protein
  • Acrylamide
  • morin
  • mTOR protein, rat
  • Phosphatidylinositol 3-Kinase
  • Proto-Oncogene Proteins c-akt
  • TOR Serine-Threonine Kinases