Chlorpyrifos induced reproductive toxicity in male mice.
The reproductive toxicity of the insecticide chloropyrifos was studied in male mice. Adult male mice were treated by gavage with chloropyrifos at doses of 0, 5, 15, and 25mg/kg-d for 4 weeks before mating with untreated females. Signs of cholinergic effects were observed in the 15 and 25mg/kg-d treated groups. Brain and skeletal muscle acetylcholinesterase activity was inhibited in the same groups. Chloropyrifos treatment was associated with a decreased number of live fetuses, and an increased number of dead fetuses at 25mg/kg-d. The number of early resorption was decreased in both 15 and 25mg/kg-d treated groups. The percent morphologically normal spermatozoa were affected in 15 and 25mg/kg-d dose groups; however, sperm motility and count were decreased in the same treated groups compared to the control. Histologic examination of brain revealed histological abnormalities in the middle and high groups. Dose related histologic changes, including degeneration of muscle fibers, were observed in the muscles of male mice treated with all the doses of chloropyrifos. The current study demonstrated adverse effects of male chloropyrifos exposure on pregnancy outcome with effects on sperm parameters at 15 and 25mg/kg-d.
Department of Pesticide Chemistry and Toxicology, Alexandria University, Alexandria 55555, Egypt. aminafarag2002@yahoo.com
Amina T
AT
Farag
Amany H
AH
Radwan
Fardous
F
Sorour
Ahmed
A
El Okazy
El-Sayed
el-S
El-Agamy
Abd El-Khaliek
Ael-K
El-Sebae
D000110:Acetylcholinesterase / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000201:enzymology; D004390:Chlorpyrifos / Q000008:administration & dosage / Q000633:toxicity*; D005260:Female; D005313:Fetal Death / Q000209:etiology; D007306:Insecticides; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D018482:Muscle, Skeletal / Q000187:drug effects / Q000201:enzymology; D018812:Paternal Exposure / Q000009:adverse effects*; D012098:Reproduction / Q000187:drug effects*; D013076:Sperm Count / Q000662:veterinary; D013081:Sperm Motility / Q000187:drug effects; D013094:Spermatozoa / Q000002:abnormalities / Q000187:drug effects / Q000502:physiology; D013739:Testosterone / Q000031:analogs & derivatives / Q000097:blood
D007306:Insecticides; D013739:Testosterone; C004648:testosterone enanthate; D000110:Acetylcholinesterase; D004390:Chlorpyrifos