Morphology and immunolocalization of aquaporins 1 and 9 in the agouti (Dasyprocta azarae) testis excurrent ducts

This study investigated the morphology and immunoexpression of aquaporins (AQPs) 1 and 9 in the rete testis, efferent ducts, epididymis, and vas deferens in the Azaras agouti (Dasyprocta azarae). For this purpose, ten adult sexually mature animals were used in histologic and immunohistochemical analyses. The Azaras agouti rete testis was labyrinthine and lined with simple cubic epithelium. Ciliated and non-ciliated cells were observed in the epithelium of the efferent ducts. The epididymal cellular population was composed of principal, basal, apical, clear, narrow, and halo cells. The epithelium lining of vas deferens was composed of the principal and basal cells. AQPs 1 and 9 were not expressed in the rete testis. Positive reaction to AQP1 was observed at the luminal border of non-ciliated cells of the efferent ducts, and in the peritubular stroma and blood vessels in the epididymis, and vas deferens. AQP9 was immunolocalized in the epithelial cells in the efferent ducts, epididymis and vas deferens. The morphology of Azaras agouti testis excurrent ducts is similar to that reported for other rodents such as Cuniculus paca. The immunolocalization results of the AQPs suggest that the expression of AQPs is species-specific due to differences in localization and expression when compared to studies in other mammals species. The knowledge about the expression of AQPs in Azaras agouti testis excurrent ducts is essential to support future reproductive studies on this animal, since previous studies show that AQPs may be biomarkers of male fertility and infertility.(AU)

On the morphology of the ductuli efferentes in the dog (Canis familiaris, L.) / Sobre a morfologia dos dúctulos eferentes epididimários no cão (Canis familiaris, L.)

The structure of the ductuli efferentes in the epididymis of the dog were studied by light microscopy. The efferent ductules connect the rete testis and the initial segment of the epididymis. Their epididymal segment is lined by a low simple cuboidal or columnar epithelium, which show basically nonciliated and ciliated cells. The morphological characteristics of ductuli efferentes are discussed in this report.

A estrutura dos dúctulos eferentes no epidídimo do cão foi estudada através de microscopia óptica. Os dúctulos eferentes conectam a rede testicular com o segmento inicial do epidídimo. Os eferentes epididimários são revestidos por epitélio baixo do tipo cúbico ou cilíndrico simples, constituído por dois tipos celulares: células ciliadas e não-ciliadas. As características morfológicas dos eferentes são discutidas.

On the morphology of the ductuli efferentes in the dog (Canis familiaris, L.) / Sobre a morfologia dos dúctulos eferentes epididimários no cão (Canis familiaris, L.)

The structure of the ductuli efferentes in the epididymis of the dog were studied by light microscopy. The efferent ductules connect the rete testis and the initial segment of the epididymis. Their epididymal segment is lined by a low simple cuboidal or columnar epithelium, which show basically nonciliated and ciliated cells. The morphological characteristics of ductuli efferentes are discussed in this report.

A estrutura dos dúctulos eferentes no epidídimo do cão foi estudada através de microscopia óptica. Os dúctulos eferentes conectam a rede testicular com o segmento inicial do epidídimo. Os eferentes epididimários são revestidos por epitélio baixo do tipo cúbico ou cilíndrico simples, constituído por dois tipos celulares: células ciliadas e não-ciliadas. As características morfológicas dos eferentes são discutidas.