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The toxic effects of 4-tert-octylphenol on the reproductive system of male rats

Qian Bian1, Jie Qian, Lichun Xu

  • 1The Key Laboratory of Reproductive Medicine of Jiangsu Province, Institute of Toxicology, Nanjing Medical University, Nanjing 210029, China.

Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
|April 25, 2006
PubMed

Insights

This study reveals that 4-tert-octylphenol (OP) impairs rat testicular function, reducing sperm motility and affecting spermatogenic and Sertoli cells. These findings highlight OP

Area of Science:

  • Reproductive Toxicology
  • Environmental Health
  • Endocrinology

Background:

  • 4-tert-octylphenol (OP) is an alkylphenol with potential endocrine-disrupting properties.
  • Understanding the reproductive toxicity of environmental contaminants like OP is crucial for public health.
  • Previous research has not fully elucidated the specific effects of OP on male reproductive functions, particularly sperm motility.

Purpose of the Study:

  • To investigate the toxic effects of oral administration of 4-tert-octylphenol (OP) on the testicular functions of male Sprague-Dawley rats.
  • To assess the impact of OP on sperm parameters, testicular histology, and biochemical markers.
  • To provide initial data on the effects of OP on sperm motility.

Main Methods:

  • Male Sprague-Dawley rats were administered varying doses of OP (0, 50, 150, 450 mg/kg/d) for 30 days.
  • Testicular function was evaluated using histopathology, sperm head counts, daily sperm production, sperm motility (Computer Assisted Sperm Analysis - CASA), and biochemical assays (alkaline phosphatase).
  • Organ weights (testis, epididymis, prostate) were measured.

Main Results:

  • OP exposure led to reduced testis, epididymis, and prostate weights across all tested dosages.
  • Histopathological examination revealed damage to spermatogenic and Sertoli cells.
  • Significant decreases in testicular sperm numbers, daily sperm production, and alkaline phosphatase activity were observed at the highest OP dose (450 mg/kg/d).
  • Sperm motility was significantly reduced in rats treated with 150 and 450 mg/kg/d of OP.

Conclusions:

  • 4-tert-octylphenol (OP) adversely affects testicular functions in male rats.
  • The primary targets of OP toxicity appear to be spermatogenic cells and Sertoli cells.
  • This study provides the first evidence of OP's negative impact on sperm motility.

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