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Repeated administrations of Mn3O4 nanoparticles cause testis damage and fertility decrease through PPAR-signaling

Xiao Zhang1, Zongkai Yue2, Haijun Zhang1

  • 1Center for Aircraft Fire and Emergency, Civil Aviation University of China, China.

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|January 8, 2020
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Summary

Manganese oxide nanoparticles (Mn3O4-NPs) show potential toxicity to the male reproductive system. Studies reveal Mn3O4-NPs accumulate in testes, causing oxidative stress, reduced sperm quality, and decreased fertility.

Keywords:
Mn3O4 nanoparticlesapoptosisfertility decreasetestis

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Area of Science:

  • Nanomaterial toxicology
  • Male reproductive health
  • Biomedical applications

Background:

  • Nanomaterials offer significant clinical benefits but raise concerns regarding reproductive health.
  • The specific impact of Manganese oxide nanoparticles (Mn3O4-NPs) on the male reproductive system remains largely uninvestigated.

Purpose of the Study:

  • To investigate the potential reproductive toxicity of Mn3O4-NPs in a male rat model.
  • To elucidate the underlying mechanisms of Mn3O4-NP-induced testicular damage and fertility reduction.

Main Methods:

  • Male rats were repeatedly injected intravenously with Mn3O4-NPs (10 mg/kg/week) for 60 and 120 days.
  • Evaluated testicular accumulation, serum sex hormone levels, oxidative stress markers (malondialdehyde), mitochondrial membrane potential, sperm quantity/quality, and fertility.
  • In vivo and in vitro experiments were conducted to assess apoptosis.

Main Results:

  • Mn3O4-NPs accumulated in testes, leading to increased oxidative stress and disrupted sex hormone balance.
  • Oxidative stress triggered mitochondria-mediated apoptosis, evidenced by elevated malondialdehyde and decreased mitochondrial membrane potential.
  • Significant reductions in sperm quantity and quality were observed, culminating in decreased fertility.

Conclusions:

  • Mn3O4-NPs pose a potential risk to male reproductive health.
  • The toxicity mechanism involves oxidative stress and mitochondria-mediated apoptosis.
  • Clinical applications of Mn3O4-NPs require careful consideration due to potential adverse effects on male fertility.