background: garcinia kola seed is consumed indiscriminately in nigeria without recourse to its potential toxicity. therefore, this study was aimed at assessing the toxicity of the aqueous extract of g. kola seeds on selected tissues of male rats.  methods: thirty male rats (215.00 ± 18.58 g) were assigned into four groups: a, b, c and d which received 0.5 ml of distilled water, 25, 50 and 100 m...

This study was undertaken to investigate the hematological and biochemical changes in experimentally infected goats with Besnoitia caprae from the time of infection till 360 days post-infection (PI). Six male goats were inoculated subcutaneously with 13 × 10(7) bradyzoites of B. caprae, and blood samples were collected from the jugular vein. The total erythrocyte and total leukocyte counts, hem...

Lignans, similar in structure to endogenous sex steroid hormones, may act in vivo to alter hormone metabolism and subsequent cancer risk. The objective of this study was to examine effects of dietary intake of a lignan-rich plant food (flaxseed) on serum concentrations of endogenous hormones and binding proteins (estrone, estrone sulfate, 17 beta-estradiol, sex hormone-binding globulin, progest...

We previously observed that in men concentrations of serum testosterone (T) not bound to sex-hormone-binding globulin (n-SHBGT) decreased as concentrations of cortisol increased in early morning. This led us to investigate in vitro the influence of several steroids on protein-bound T. Steroids were added to late-evening sera containing low concentrations of cortisol. Changes were measured in pe...

Various indexes of thyroid status were measured in sera from normal men and women, normal women who were using oral contraceptives, hyper. and hypothyroid patients, and hypothyroid patients being successfully managed with various forms of replacement therapy. Total circulating thyroxine concentrations were measured by three methods as well as the thyroxine.binding capacity of the serum inter-al...

There are no studies in vivo on the effects of insulin on androgens and sex hormone-binding globulin (SHBG) in men. We, therefore, investigated the effects of insulin suppression on testosterone and SHBG in two groups of eight nondiabetic adult obese men and six healthy normal weight men who underwent diazoxide treatment (100 mg, three times daily) for 7 days. Blood samples for hormone determin...

In the sera of a number of patients with rheumatoid arthritis an unusual, high molecular weight protein component could be detected by direct ultracentrifuge analysis of whole serum. This material sedimented more rapidly than the normal 19 S component and reached concentrations up to 340 mg. per cent. Similar components were not observed in a limited control series. The high molecular weight ma...