The glycoprotein hormones of the anterior pituitary and of the placenta are made up of a and p subunits, one of which, the a, is common to each hormone. Thcy therefore share some similar physicochemical and immunological properties, and the complete purification of follicle-stimulating hormone, for instance, has proved difficult. Many preparations which have appeared to be pure by one criterion...

Background & Objective:  Molybdenum trioxide nanoparticles (MoO3 NPs) have widespread applications in industries. However, the toxic and non-toxic effects of MoO3 NPs have not been fully investigated yet. In this study, effects of MoO3 NPs on ovary function of female rats were studied.  Materials & Methods:  In this study, 21 female rats were randomly divided into three groups (n=7): the first...

A radioimmunoassay procedure for follicle-stimulating hormone in serum has been developed in which the assay mixture is incubated at 37#{176}C for a total of 22 h, rather than at 4#{176}C for 4-7 days. The withinassay coefficients of variation for the 37#{176}C and 4#{176}C methods, respectively, are 7.7% and 5.0%, while the between-assay variations are 13.8% and 9.9%. Comparison of values for ...

BACKGROUND Ovarian cysts are a common cause for gynecological surgery. However, some cysts are a direct result of endocrine disorders and do not require surgery. This report describes an unusual case in which persistent ovarian cysts are associated with primary hypothyroidism in a young woman. The data were collected by history-taking, physical examination, laboratory tests, ultrasound, magneti...

Pausinystalia yohimbe (P. yohimbe) stem bark powder is commonly used as seasoning for barbecue beef in Nigeria and some West African countries. This study evaluated the effect of ingesting ethanol extract P. on hormones tissues linked with fertility female Wistar rats. A total fifteen adult rats weighing between 140 - 160g were this after an initial Acute Toxicity test was done to establish a s...

We have investigated the factors that regulate aromatase activity in fetal-neonatal rat ovaries. Ovarian aromatase activity (assessed by measuring the amount of 3H2O) formed from [1 beta-3H]testosterone) is low prior to birth (less than 0.5 pmol/hr per mg of protein) and increases to values greater than 30 pmol/hr per mg of protein between days 8 and 12 after birth. The appearance of ovarian ar...

Khosrow Adeli Clinical Biochemistry, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8 Canada List of abbreviations: CALIPER, Canadian Laboratory Initiative on Pediatric Reference Intervals; RIDL, Reference Intervals and Decision Limits; IFCC, International Federation of Clinical Chemistry and Laboratory Medicine; CLSI, Clinical Laboratory Standards Institute; GGT...

Recent research studies associate elevated gonadotropin levels with dementia. Specifically, an age associated increase in levels of luteinizing hormone has been linked to an increased risk of Alzheimer's disease. The objective of this study was to investigate the association between gonadotropin levels and cognition in older, healthy postmenopausal women. Cognitive functioning was compared with...