�ber die Wirkung sympathicomimetischer Amine am isolierten Ductus deferens des Meerschweinchens

1965 ◽  
Vol 251 (2) ◽  
pp. 163-164 ◽  
Author(s):  
O. A. Nedergaard ◽  
E. Westermann
Keyword(s):  
Ductus Deferens

scholarly journals Microvasculature of the epididymis and ductus deferens of domestic fowls.

1988 ◽  
Vol 50 (2) ◽  
pp. 371-381 ◽  
Author(s):  
Masaaki NAKAI ◽  
Yoshiharu HASHIMOTO ◽  
Hiroshi KITAGAWA ◽  
Yasuhiro KON ◽  
Norio KUDO
Keyword(s):  
Ductus Deferens

scholarly journals The Effect of Testis Hormone on the Preservation of Sperm Life in the Vas Deferens of the Fowl

1938 ◽  
Vol 15 (2) ◽  
pp. 186-196
Author(s):  
S. S. MUNRO
Keyword(s):  
Natural Selection ◽  
Vas Deferens ◽  
Physiological Saline ◽  
Testicular Tissue ◽  
Sexual Cycle ◽  
Mature Sperm ◽  
Average Period ◽  
Ductus Deferens ◽  
Fertilizing Ability ◽  
Positive Effect

1. Mature sperm in the isolated ductus deferens of the fowl retain the capacity for movement in physiological saline for an average period of 26 or 28 days and a maximum of slightly more than 30 days, irrespective of the presence or absence of functional testicular tissue. Considering that sperm lose fertilizing ability before motility, this time accords closely with the reported survival of fertility in the hen after segregation from the cock. 2. While thus showing that testis hormone is not directly concerned with the maintenance of sperm life in the excurrent reproductive ducts of the fowl and suggesting that its positive effect in mammals is likewise indirect, it does not preclude the possibility that its action is expressed indirectly only through the epididymis. 3. The fact that the epididymis in the fowl is rather a vestigial organ and does not act as a storehouse for sperm makes it clear that in any case a physiologically controlled sperm-preserving mechanism plays no important role in the economy of reproduction in the fowl. 4. It is suggested that the nature of the demands made upon the supply of sperm in ducts of the males, as a consequence of the evolution of the sexual cycle in their respective females, satisfactorily accounts for the wide divergence in degree of epididymal development between Aves and Mammalia. Such demands, if in fact responsible for the divergence, have probably conferred advantages on well-equipped males and have most likely been produced through the agency of natural selection.

scholarly journals Characterization and Expression of the Laminin γ3 Chain: A Novel, Non-Basement Membrane–associated, Laminin Chain

1999 ◽  
Vol 145 (3) ◽  
pp. 605-618 ◽  
Author(s):  
Manuel Koch ◽  
Pamela F. Olson ◽  
Anne Albus ◽  
William Jin ◽  
Dale D. Hunter ◽  
...  
Keyword(s):  
Basement Membrane ◽  
Basement Membranes ◽  
Chromosome 9 ◽  
Seminiferous Tubules ◽  
Apical Surface ◽  
Gene Encoding ◽  
Ductus Deferens ◽  
Functional Roles ◽  
Cloned Gene ◽  
Ciliated Epithelial Cells

Laminins are heterotrimeric molecules composed of an α, a β, and a γ chain; they have broad functional roles in development and in stabilizing epithelial structures. Here, we identified a novel laminin, composed of known α and β chains but containing a novel γ chain, γ3. We have cloned gene encoding this chain, LAMC3, which maps to chromosome 9 at q31-34. Protein and cDNA analyses demonstrate that γ3 contains all the expected domains of a γ chain, including two consensus glycosylation sites and a putative nidogen-binding site. This suggests that γ3-containing laminins are likely to exist in a stable matrix. Studies of the tissue distribution of γ3 chain show that it is broadly expressed in: skin, heart, lung, and the reproductive tracts. In skin, γ3 protein is seen within the basement membrane of the dermal-epidermal junction at points of nerve penetration. The γ3 chain is also a prominent element of the apical surface of ciliated epithelial cells of: lung, oviduct, epididymis, ductus deferens, and seminiferous tubules. The distribution of γ3-containing laminins on the apical surfaces of a variety of epithelial tissues is novel and suggests that they are not found within ultrastructurally defined basement membranes. It seems likely that these apical laminins are important in the morphogenesis and structural stability of the ciliated processes of these cells.

scholarly journals 58 Histomorphological Study of Epididymis, ductus deferens and phallus in Adult Male Guinea Fowl (Numida meleagris)

2019 ◽  
Vol 42 (2) ◽  
pp. 58-65
Author(s):  
Shakir M. Mirhish
Keyword(s):  
Copulatory Organ ◽  
Guinea Fowl ◽  
Rete Testis ◽  
Columnar Epithelium ◽  
Local Market ◽  
Ductus Deferens ◽  
Numida Meleagris ◽  
The Mean ◽  
Characteristic Features ◽  
Epididymal Duct

This study was conducted to investigate the anatomical, histological characteristic features of epididymis, ductus deferens and phallus of male guinea fowl (Numidia meleagris ). Fifteen healthy male guinea fowl aged between 18-24 months, weighing 1280 - 1405 gram were used in current study which brought from local market in Baghdad governorate. The epididymis of guinea fowl consisted from rete testis, efferent ductless, connecting duct and epididymal duct. The study revealed that the mean diameter of epididymal ducts was 285.17± 2.43µm lined with pseudostratified columnar epithelium. The epididymal duct continuous with ductus deferens which become wider caudally towards the cloaca, the length of right and left ductus deferens were 9.16±1.20 cm and 9.80±1.24cm respectively. The copulatory organ (phallus) of guinea fowl was not well developed and non-intermittent type consist from right and left lateral lymphoid bodies with median eminences, the transverse width 5.01±0.24mm, the cranio-caudal width 3.51±0.07mm and dorso- ventral width 4.32±0.25mm. The lining epithelium of coprodeum was pseudo stratified columnar epithelium. This study concluded that the epididymis of male guinea fowl located on dorsomedial surface of the testes and without definite parts as in domestic animals, the ductus deferens of guinea fowl was tortuous, the phallus of guinea fowl is non - intermittent type.

Induction of functional cytodifferentiation in the epithelium of tissue recombinants. II. Instructive induction of Wolffian duct epithelia by neonatal seminal vesicle mesenchyme

Development ◽  
1989 ◽  
Vol 106 (2) ◽  
pp. 235-250 ◽  
Author(s):  
S.J. Higgins ◽  
P. Young ◽  
G.R. Cunha
Keyword(s):  
Seminal Vesicle ◽  
Normal Development ◽  
Seminal Vesicles ◽  
Wolffian Duct ◽  
Secretory Proteins ◽  
Ductus Deferens ◽  
Tissue Sections ◽  
Duct Epithelium ◽  
Mouse Tissues ◽  
Renal Grafts

When grown as renal grafts in adult male hosts, the upper (cranial), middle and lower (caudal) portions of fetal mouse and rat Wolffian ducts developed into epididymis, epididymis plus ductus deferens, and seminal vesicle, respectively. In heterotypic tissue recombinants, the epithelia from upper and middle Wolffian ducts were instructively induced to undergo seminal vesicle morphogenesis by neonatal seminal vesicle mesenchyme. Functional cytodifferentiation was examined in these recombinants using antibodies against major androgen-dependent, seminal vesicle-specific secretory proteins. The instructively induced Wolffian duct epithelia synthesized normal amounts of all of the secretory proteins characteristic of mature seminal vesicles, as judged by immunocytochemistry on tissue sections and gel electrophoresis plus immunoblotting of secretions extracted from the recombinants. In heterospecific recombinants composed of rat and mouse tissues, the seminal vesicle proteins induced were specific for the species that had provided the epithelium. This showed that the seminal vesicle epithelium in the recombinants was derived from instructively induced Wolffian duct epithelium and not from epithelial contamination of the mesenchymal inductor. Upper Wolffian duct epithelium, instructively induced to undergo seminal vesicle morphogenesis, did not express epididymis-specific secretory proteins, showing that its normal development had been simultaneously repressed.

Human Papillomavirus Infection of the Epididymis and Ductus Deferens: An Evaluation by Nested Polymerase Chain Reaction

2003 ◽  
Vol 127 (11) ◽  
pp. 1471-1474 ◽  
Author(s):  
Alexandr Švec ◽  
Iva Mikyšková ◽  
Ondřej Hes ◽  
Ruth Tachezy
Keyword(s):  
Polymerase Chain Reaction ◽  
High Risk ◽  
Hpv Infection ◽  
Low Risk ◽  
Chain Reaction ◽  
Nested Polymerase Chain Reaction ◽  
Ductus Deferens ◽  
Hpv Types ◽  
Polymerase Chain ◽  
High Risk Hpv

Abstract Context.—Human papillomaviruses (HPVs) play an important role in the etiology of squamous cell carcinoma of the uterine cervix. The possible role of the male urogenital tract as a reservoir of HPV infection is not fully understood. We inferred from our previous observation of HPV-31 in epididymal tissue in a case of chronic epididymitis that HPV might be commonly present in cases of epididymitis caused by sexually transmitted pathogens. Objective.—To assess the presence of HPV in the epididymis and ductus deferens in nontuberculous epididymitis. Design.—Epididymal samples obtained from 17 patients and epididymal and ductus deferens samples from 5 patients surgically treated for nontuberculous epididymitis were analyzed by nested polymerase chain reaction for the presence of HPV DNA. In positive samples, the HPV type was determined by DNA sequencing. Setting.—Tertiary-care academic hospital and national reference laboratory for papillomaviruses. Results.—Low-risk HPV type 6 and high-risk HPV types 16, 33, 35, 55, and 73 were detected in 7 patients (31%). Neither koilocytes nor dysplastic changes were found in the epididymis and ductus deferens. Conclusion.—Low-risk and high-risk HPV types were detected in the epididymis and ductus deferens of patients with nontuberculous epididymitis. The infection was not accompanied by koilocytic atypia or dysplasia. Our findings support the hypothesis that the male urogenital tract serves as a reservoir of HPV infection.

Sign in / Sign up

Export Citation Format

Share Document