Mediation of contraction in rat cauda epididymidis by alpha-adrenoceptors
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چکیده
منابع مشابه
Motility activation and second messenger signalling in spermatozoa from rat cauda epididymidis.
This study examined molecular mechanisms involved in the activation of motility in spermatozoa from the cauda epididymidis of rats. A 1.05-fold dilution of semen from the cauda epididymidis with 300 mmol sucrose l(-1) did not activate motility in spermatozoa. Addition of dibutyryl cAMP, pentoxifylline or Ca(2+) to the sucrose activated motility in the short term (<30-60 min). A fivefold dilutio...
متن کاملThe isolated duct of the rat cauda epididymidis as a model for isosmotic transport studies.
Electrolytes and water transport have been studied in the perfused isolated duct of the rat cauda epididymis in vitro. The rates of reabsorption of sodium, chloride and water and of secretion of potassium were found to be comparable to those in the perfused rat cauda epididymidis in vivo. Sodium reabsorption was isotonic and inhibited by the metabolic uncoupler 2,4-dinitrophenol and cooling. Re...
متن کاملCharacterisation of alpha-adrenoceptors of rat superior mesenteric-portal vein.
The effect of specific alpha[ or alpha2 adrenoceptor agents on the response of rat superior mesenteric-portal vein to field stimulation was investigated. In. a dose related manner, phenylephrine (alpha[ agonist) and yohimbine (alpha2 antagonists) increased while prazosin (alpha[ antagonist) and clonidine (alpha2 agonist) decreased the response of the vein to field stimulation. These effects are...
متن کاملInvestigation of Chlamydiaceae in semen and cauda epididymidis and seroprevalence of Chlamydophila abortus in breeding bulls
BACKGROUND Reproductive disorders associated with chlamydial infection have been reported worldwide in cattle and there are indications of potential venereal transmission. METHODS Semen samples from 21 dairy bulls and cauda epididymidis tissue samples from 43 beef bulls were analysed for chlamydial agent by real-time polymerase chain reaction (PCR) including an internal amplification control ...
متن کاملCrosstalk between alpha-1A and alpha-1B adrenoceptors in neonatal rat myocardium: implications in cardiac hypertrophy.
The myocardial effect of alpha-1A adrenoceptor (alpha-1 AR) agonists in neonatal rats are mediated by alpha-1A AR and not by alpha-1B AR, although both receptor subtypes are equally expressed; the functions of alpha-1B AR are not known. Here, we report that alpha-1 B ARs inhibit the activities of alpha-1A ARs in neonatal rat myocardium so that the inactivation of alpha-1 B ARs by chloroethylclo...
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ژورنال
عنوان ژورنال: Reproduction
سال: 2002
ISSN: 1470-1626,1741-7899
DOI: 10.1530/rep.0.1240887