Abstract
Sixty-three normal Caucasian men were administered intramuscular testosterone enanthate (TE) 200 mg i.m. weekly for 12 months as part of a male contraceptive trial. This dose of TE caused a 2.5-fold increase in trough serum testosterone concentrations. High density lipoprotein cholesterol (HDL-C) was significantly depressed from pretreatment concentration of 1.19 ± 0.04 nmol/l to 1.03 ± 0.04 mmol/l after 12 weeks of treatment, and remained suppressed for the duration of treatment (p < 0.001). There were no changes in serum concentration of total cholesterol (TC), low density lipoprotein cholesterol (LDL-C) or triglycerides (TG) during treatment, but the concentrations of TC and LDL-C were depressed at three months post-treatment. There was a sustained elevation in LDL-C: HDL-C ratio during TE treatment (p < 0.005), from 3.41 ± 0.15 pretreatment to 3.88 ± 0.19 after 12 weeks of TE treatment. Sex hormone binding globulin (SHBG), but not testosterone (T) or estradiol (E 2), was significantly associated with HDL-C (r = 0.83, p = 0.001). Lipoprotein (a) (Lp(a)) was measured in a subgroup of 33 men: serum concentration fell from 187 ± 45 mg/l pretreatment to 140 ± 35 mg/l after 16 weeks of TE treatment (p < 0.01).
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