Environmental estrogen mimics, including metalloestrogens that can activate estrogen receptor-alpha (ERα), may contribute to breast cancer risk. However, the underlying mechanisms through which these molecular mimics activate the ERα are generally poorly understood. With concern to this important question, we investigated whether intracellular calcium may mediate the cross-talk between signalin...

A new method, based on computer-assisted kinetic analysis of 45Ca efflux data, was used to measure calcium contents and fluxes for extracellular and intracellular compartments in intact segments of rabbit aorta. After a 1-hour loading period, efflux data were collected for 8 hours using a flow-through tissue chamber. These long-term effluxes were necessary because information on intracellular c...

Background: Parthenogenetic activation of mammalian oocytes using artificial stimuli is commonly used in various reproductive bio-techniques. Calcium ionophore is known to elevate intracellular calcium levels in the cytoplasm of oocytes through the influx of calcium from extracellular spaces. Ethanol promotes a single intracellular Ca2+ increase of greater and longer amplitude than the initial ...

 In recent years, researchers have been looking for genes whose products can directly affect the aging process. Among these, the anti-aging protein klotho has attracted much attention. This single transmembrane protein is expressed in the renal tissues, parathyroid gland and choroid network of the brain and acts as a co-receptor for Fibroblast Growth Factor FGF. In this way, it contributes to c...

Pig oocytes matured in vitro are parthenogenetically activated after treatment with nitric oxide (NO)-donor SNAP. The chelation of intracellular calcium ions with BAPTA-AM suppressed the SNAP-induced activation in a dose-dependent manner. Activation by a NO-donor is dependent on the influx of calcium from extracellular spaces, because the blockage of calcium channels by verapamil had significan...

Four monoclonal anti-parathyroid antibodies were generated after immunization of mice with intact cells from human parathyroid tissue. All four monoclonal antibodies reacted in immunohistochemistry with structures present on parathyroid epithelial cells and proximal-tubule cells of the kidney but were unreactive with all other human tissues investigated. Immunofluorescence microscopy on suspend...

SUKI, WADI N., RICK S, SCHWETTMANN, FLOYD C. RECTOR, JR., AND DONALD W. SELDIN. &fect of chronic minerahorticoid administration on calcium excretion in the rat. Am. J. Ph ysiol. 2 15 ( 1) : 7 l-74. 1968.~The effect of prolonged 9-alphafluorohydrocortisone administration on sodium and calcium excretion was investigated in rats fed a low-calcium synthetic diet. In rats fed salt the administration...