Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P56851 (epididymal)
 11,273 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Unilateral implantation of a small silastic capsule containing crystalline Norethisterone Enanthate (NE, average observed rate of release, 17-22 micrograms/24 h) into the epididymal fat-pad of adult rats induced drastic impairment of epididymal functional anatomy in the adjacent epididymis six weeks later without affecting the contralateral epididymis. Tubular elements in the ipsilateral epididymis were highly shrunken with their luminal epithelial height greatly reduced and the lumen devoid of spermatozoa as compared with the normal epididymis (full of spermatozoa) on the sham operated contralateral side.
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PMID:Effect of continuous local microdose norethisterone enanthate on the epididymis of adult rat. 663 37

Silastic implants containing crystalline Norethisterone Enanthate (NE) inserted into the epididymal fat-pads unilaterally were found to bring about a drastic reduction (P smaller than 0.01) in the size and weight of the testis six weeks after implant insertion on the side bearing the progestin implant. The ipsilateral (treated side) testis, caput and cauda epididymis and the vas deferens showed either a complete absence of spermatozoa or occasional few immotile and decapitated sperms. In contrast, the smears obtained from the contralateral testis and the corresponding epididymal segments and the vas showed a population of entirely normal and motile spermatozoa. There was apparently no effect on the epididymis as the ipsilateral epididymis was almost similar (weight-wise) to that of the contralateral side. The results suggested an apparently local effect of NE implants inserted into the epididymal fat pads. The feasibility of the approach for long-term fertility regulation in males is discussed.
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PMID:Effect of chronic local administration of norethisterone enanthate on the testes of adult rat. 736 60

Norethisterone (NET) and its metabolite 5alpha-norethisterone (5alpha-NET) are competitors for the androgen receptor. The sensitivity of the rat vas deferens to the contractile action of methoxamine and serotonin is regulated by hormonal and anatomical factors. The aim of this study was to evaluate the ability of NET and 5alpha-NET to induce the androgen-regulated contractile response to methoxamine and serotonin in the epididymal and prostatic portions of rat vas deferens. Adult male rats either intact, castrated or steroid-treated castrated were used. The contractility was recorded isometrically, and non-cumulative concentration-response curves to either methoxamine or serotonin were obtained. NET and 5alpha-NET partially restored the sensitivity to methoxamine and serotonin in the epididymal portion of castrated rats. The maximal responses to both agonists were significantly higher than those observed in castrated rats, and significantly lower than the responses observed in either intact or androgen-treated castrated rats. The prostatic portion was less responsive to both agonists than the epididymal portion, in all groups but castrated rats, as castration induced sensitivity to both agonists. NET and 5alpha-NET displayed a partial though similar androgenic activity in the rat vas deferens. These results contrast with previous reports where a decrease of androgenic effect due to the 5alpha-reduction of NET has been found.
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PMID:The androgenic effect of norethisterone and 5alpha-norethisterone on the contractile response of the rat vas deferens to methoxamine and serotonin. 1035 Mar 63