Another consideration with exogenous oral dosing of most sex steroids
is that the levels of steroid metabolites can potentially interfere with an immunoassay designed to measure a specific steroid hormone, resulting in false-high values.
and potential mechanisms of non-genomic endocrine disruption in invertebrates.
Comparison of sex steroid
measurements in men by immunoassay versus mass spectroscopy and relationships with cortical and trabecular volumetric bone mineral density.
DHEA, important source of sex steroids
in men and even more in women.
Genetic females can be experimentally sex-reversed to phenotypic males when the larvae are reared at high water temperature or treated with sex steroid
hormones (Kitano et al.
Plasma sex steroids
and tissue aromatization in hatchling Zebra Finch: implications for sexual differentiation of singing behavior.
Bioavailable sex steroids
comprise the fractions that are free or bound to albumin in the circulation, and in contrast to the fraction bound to SHBG, it is these fractions that have rapid access to target tissues (26,27).
Emerging evidence suggests excess body fat increases the body's level of sex steroids
and other hormones that are linked to cancer growth, Kolonel said.
This communication is accomplished through the endocrine system, which controls sex differentiation through complex interactions between the central nervous system and gonads using pituitary-derived gonadotropins and sex steroids
produced in the gonad and brain (Nagahama 1994).
In these proceedings for an October 2003 conference, contributors update topics and relevant issues in cancer research and clinical oncology, such as genetics, genomics, proteomics, signals and translational research in neuroectodermal timors, biomolecular surveying of cell signals, cell-to-cell communication, signals transduced by environmental and endogenous sex steroids
, signals and molecular targets in human cancer tissues and cells, cell migration and adhesion, gene expression and silencing, and rational approaches to the design of therapeutics targeting molecular markers in hematologic malignancies.
Previous studies have suggested a link between deformities in fish and sex steroids
entering streams after livestock consumed them in feed and then excreted them (SN: 1/5/02, p.
This hormone's effects are even more intense than those of the more well- known sex steroids
, testosterone and estrogen.