| Effect  of Nicotine on Reproductive Hormones in Adult Male Mice (Mus musculus)  
                              S. Sharif*, N.   Fatima, T. Farasat and A. A Latif  Department of Zoology, Lahore  College for Women  University, Lahore, Pakistan ABSTRACT 
                              The study  was conducted to determine the direct effect of nicotine administration on  reproductive hormones in adult male mice (Mus musculus). Adult mice (n=60)  were randomly divided into two groups viz. experimental (n=40) and control  (n=20) groups. Experimental group was injected with nicotine subcutaneously  (1mg/ kg body weight); whereas, the control group was administered with normal  saline solution subcutaneously for 6 weeks. At the end of six weeks, blood was  collected to determine the concentrations of luteinizing hormone and  testosterone using enzyme linked immunosorbent assay (ELISA). Results showed  that nicotine significantly (p < 0.05) decreased the levels of luteinizing  hormone and testosterone in the experimental group compared to the control  group. It was concluded that intake of nicotine may cause some deleterious  effects on reproductive hormones in mice.   Key words: Nicotine, luteinizing  hormone, testosterone, mice Corresponding author:ssharif1978@yahoo.com
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