Cellular signal transduction is a complex phenomenon, which plays a central role in cell surviving and adaptation. The great amount of molecular data to date present in literature, together with the adoption of high throughput technologies, on the one hand, made available to scientists an enormous quantity of information, on the other hand, failed to provide a parallel increase in the understan...

BACKGROUND The aim of this study was to investigate the in vitro effects of the Fusarium fungus-derived mycotoxin, zearalenone and its derivatives alpha-zearalenol and beta-zearalenol on motility parameters and the acrosome reaction of stallion sperm. Since the toxic effects of zearalenone and its derivatives are thought to result from their structural similarity to 17beta-estradiol, 17beta-est...

reproductive risk of incomplete fertilization (Mortensen, 1938). Given evidence of at least occasional sperm limitation in marine environments (Levitan and Petersen, 1995; Yund, 2000), recent work has examined whether this risk is reduced by particular features of adults or gametes that could improve chances of sperm–egg encounter (Denny et al., 1992; Levitan et al., 1992; Petersen et al., 1992...

Seminal fluid proteins transferred from males to females during copulation are required for full fertility and can exert dramatic effects on female physiology and behavior. In Drosophila melanogaster, the seminal protein sex peptide (SP) affects mated females by increasing egg production and decreasing receptivity to courtship. These behavioral changes persist for several days because SP binds ...

important aspect of sperm function such as motility and capacitation appear to be mediated at least partially though hyaloronic acid (ha). present study investigated effects of different doses of ha on sperm motility and vitality in human. sperm was obtained from 20 male from ivf clinic in imam khomeini hospital. sperm motility and vitality in human semen was analyzed according to who criteria ...

17α-estradiol (αE2), an endogenous stereoisomer of the hormone 17β-estradiol (E2), is capable binding to estrogen receptors (ER). We aimed mathematically describe, using experimental data, possible interactions between αE2 and sperm ER during process capacitation develop a kinetic model. The goal was compare suggested model with previously published results E2 17α-ethynylestradiol (EE2). HPLC-M...

Red abalone (Haliotis rufescens) sperm detect a waterborne chemical cue released by conspecific eggs, and change their swimming behavior to increase the likelihood of fertilization success. Previously, we isolated the natural sperm attractant by bioassay-guided fractionation and high-performance liquid chromatography, and chemically identified it as the free-amino acid l-tryptophan (l-Trp). In ...

In the last decades, a growing body of evidence has been reported concerning the expression and functional role of hepatocyte growth factor (HGF) on different aspects of testicular physiology. This review has the aim to summarize what is currently known regarding this topic. From early embryonic development to adult age, HGF and its receptor c-Met appeared to be clearly detectable in the testis...

Abstract The endocrine-disrupting effects of triclosan, an antimicrobial agent, and its involvement in reproductive responses mediated through different modes activity various fish species have been documented. present study aims to explore whether triclosan at environmentally relevant sublethal concentrations could influence the physiology Anabas testudineus spawning phase. Fish were exposed (...

OBJECTIVE To assess developmental capacity of fertilised oocytes by sperm of mouse exposed to forced swimming stress. METHODS The experimental study was conducted at the Physiology Research Center of Ahvaz Jundishapur University of Medical Sciences, from August 2011 to January 2012. It comprised 20 adult male and 10 female mice. The male mice were randomly divided into two equal groups (n=10)...