Nigerian bonny light crude oil induces irreversible reproductive toxicity in adult male rats

The reversibility of reproductive toxicity induced by the Nigerian Bonny light crude oil (BLCO) was investigated in rats. Adult male Wistar rats were orally treated with BLCO at 0, 50, 100 and 200mg kg(-1) for 21 days. One-half of the rats were sacrificed on day 22 while the remaining one-half staye...

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Bibliographic Details
Published inAfrican journal of medicine and medical sciences Vol. 41 Suppl; p. 65
Main Authors Adedara, I A, Ebokaiwe, A P, Ehwerhemuepha, T, Teberen, R, Farombi, E O
Format Journal Article
LanguageEnglish
Published Nigeria 01.12.2012
Subjects
Administration, Oral
Animals
Antioxidants - metabolism
Disease Models, Animal
Environmental Exposure - prevention & control
Fertility - drug effects
Humans
Infertility, Male - epidemiology
Infertility, Male - etiology
Infertility, Male - prevention & control
Male
Nigeria - epidemiology
Oxidative Stress
Petroleum - toxicity
Rats
Rats, Wistar
Risk Factors
Spermatozoa - drug effects
Spermatozoa - metabolism
Spermatozoa - pathology
Testis - drug effects
Testis - metabolism
Testis - pathology
Time Factors
Nigeria
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Summary:The reversibility of reproductive toxicity induced by the Nigerian Bonny light crude oil (BLCO) was investigated in rats. Adult male Wistar rats were orally treated with BLCO at 0, 50, 100 and 200mg kg(-1) for 21 days. One-half of the rats were sacrificed on day 22 while the remaining one-half stayed additional 21 days without treatment. While sperm quality was compromised in dose-dependent manner, testis histopathology was only evident at 200 mg kg(-1) after 21 days. BLCO significantly decreased activities of superoxide dismutase, catalase and glucose-6-phosphate dehydrogenase but markedly elevated gamma glutamyltransferase and glutathione S-transferase activities as well as malondialdehyde, hydrogen peroxide and glutathione levels in both testes and sperm. Most of the above-mentioned parameters were consistent in animals from withdrawal experiment. Taken together, BLCO exposure impaired fertility via increased oxidative stress and was not reversible upon withdrawal of treatment within the time course of investigation in male rats. BLCO exposure poses a risk for impaired fertility and its contribution to infertility in the Nigerian male population may not be excluded.
ISSN:0309-3913