Aflatoxins (AFs) are natural contaminants of feed and feedstuffs, thus the study of the noxious effects ofthese agents on the male reproductive system is of outstanding importance. Our aim for this study is theevaluation of the effects of oral administration of aflatoxin B1 on the reproductive hormonal changes in adult male rat. Twenty eight Wistar strain male rats were selected for this study....

A 7½-year-old girl is reported showing pre­cocious puberty and large abdominal mass for a year. The right ovarial cyst removed by surgery revealed histopathologically a granu­losa cell tumor. After removal of the tumor the estrogens were still increased and the signs of puberty showed no regression. This seems to be due to the hormonal activity of the metas­tases. Liver metastasis was present a...

OBJECTIVE Physical activity leads to changes in the hypothalamic-pituitary hormonal system. However, acute and long-term adaptations have not yet been precisely characterized. In this study, the changes of the hormonal system as a result of marathon training and running a marathon were examined. In particular, we focused on adaptations of the hypothalamic-pituitary-adrenocortical (HPA) axis, re...

This report describes similarities between the structure and function of the Interferon receptor and receptors for glycoprotein hormones and several bacterial toxins. Spe cifically, it describes several common molecular and mechanistic elements, including: (a) the presence of a glycoprotein as well as a ganglioside component in the receptor; (b) changes in membrane structure as a conse quence o...

This report describes similarities between the structure and function of the interferon receptor and receptors for glycoprotein hormones and several bacterial toxins. Specifically, it describes several common molecular and mechanistic elements, including: (a) the presence of a glycoprotein as well as a ganglioside component in the receptor; (b) changes in membrane structure as a consequence of ...

Disturbances in hormonal systems involved in sodium and water homeostasis are common during respiratory insufficiency. To investigate the role of hypercapnia, we designed a study to examine the hormonal response to acute hypercapnia induced at constant cardiac filling pressures and without hypoxemia. Seven sedated patients with COPD receiving mechanical ventilation were studied during five succ...

Significant advances in health and social wellbeing have led to linear gains in life expectancy and an accompanying increase in the burden imposed by age-related morbidities. Complex alterations in hormonal networks which regulate homeostasis and survival may underlie this poor adaptation to later life, as exemplified by an increased fracture risk amongst post-menopausal women. Beyond overt und...

Hormonal fluctuation across the menstrual cycle explains temporal variation in women's judgment of the attractiveness of members of the opposite sex. Use of hormonal contraceptives could therefore influence both initial partner choice and, if contraceptive use subsequently changes, intrapair dynamics. Associations between hormonal contraceptive use and relationship satisfaction may thus be best...

This article is part of a Special Issue "Parental Care". Though hormonal changes occurring throughout pregnancy and at the time of parturition have been demonstrated to prime the maternal brain and trigger the onset of mother-infant interactions, extended experience with neonates can induce similar behavioral interactions. Sensitization, a phenomenon in which rodents engage in parental response...

BACKGROUND In the UK, a large proportion of contraceptive services are provided from general practice. However, little is known about which contraceptive services are provided and to whom. STUDY DESIGN Descriptive serial cross-sectional study of women aged 12-55 years, registered with 191 general practices in Scotland, UK between 2004 and 2009. RESULTS Annual incidence of provision o...