International Journal of Reproductive BioMedicine

ISSN: 2476-3772

The latest discoveries in all areas of reproduction and reproductive technology.

 

Impact of chronic opioid on cognitive function and spermatogenesis in rat: An experimental study

Published date: Sep 03 2024

Journal Title: International Journal of Reproductive BioMedicine

Issue title: International Journal of Reproductive BioMedicine (IJRM): Volume 22, Issue No. 7

Pages: 579–592

DOI: 10.18502/ijrm.v22i7.16971

Authors:

Hamid Norioun

Seyed Jamal Moshtaghian

Firoozeh Alavian

Maryam Khombi Shooshtari

Golnaz Alipour

Saeedeh Ghiasvand - S.ghiasvand@malayeru.ac.ir

Abstract:

Background: Opioid analgesics like morphine and methadone are widely used for managing severe pain; however, concerns over their potential misuse and adverse effects on the brain and reproductive system are significant.

Objective: We aimed to investigate their impacts on spermatogenesis and cognitive function in male Norway rats.

Materials and Methods: In this experimental study, 36 male Norway rats (250–300 gr, 6 months old) were divided into 6 groups: low-dose morphine, high-dose morphine, low-dose methadone, high-dose methadone, positive control (received normal saline at 5 mg/kg), and negative control (received no treatment). Morphine and methadone were administered intraperitoneally over 30 days at doses of 3 mg/kg and 7 mg/kg, respectively. Behavioral assessments evaluated anxiety, stress, and shortand long-term memory. Sperm parameters (viability, motility, morphology), hormonal analysis (testosterone, luteinizing hormone, follicle-stimulating hormone, estradiol), and gene expressions (Tp53, CatSper1) were assessed.

Results: A significant reduction in rat weight was observed in the high-dose morphine group (p = 0.0045), while testicular weights remained unchanged. Sperm abnormalities were observed with high doses of methadone and morphine. High-dose methadone significantly reduced offspring count (p = 0.0004). Levels of follicle-stimulating hormone, luteinizing hormone, testosterone, and estradiol varied significantly across treatment groups. Gene expression was altered in response to treatments (p < 0.05).

Conclusion: Prolonged exposure to methadone and morphine resulted in memory dysfunction, chronic stress, hormonal disturbances, altered gene expression, and fertility complications. These effects were more pronounced at higher doses, highlighting the importance of careful dosage management in opioid therapy.

Key words: Rat, Spermatogenesis, CatSper1, Tp53, Morphine, Methadone, Cognition.

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