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Electron-dense deposits in epididymal cells of rats chronically treated with lead acetate [Pb II]

100%

Piasecka M. , Rozewicka L. , Laszczynska M. , Marchlewicz M.

nr 2

Changes in the activity of alpha-galactosidase and alpha-L-fucosidase during the posthatch development and regression of Japanese quail testes and epididymis after light reduction

86%

Jozefczyk R. , Droba M. , Droba B.

nr 1

47-56

Immunolocalization of androgen receptor in the epididymis of rats with dihydrotestosterone deficiency

86%

Trybek G. , Kolasa A. , Marchlewicz M. , Wenda-Rozewicka L. , Wiszniewska B.

nr 3

Isolation technique and identification of epithelial cells from efferent ductules of the rat epididymis

86%

Rozewicka L. , Kaminska B. , Laszczynska M. , Kawiak J.

nr 4

Innervation of the chinchilla testis, epididymis, and vas deferens

72%

Sienkiewicz W. , Szczurkowski A. , Dudek A. , Kaleczyc J.

nr 4

The study was performed on six male chinchillas. The animals were anaesthetised with ether and the anaesthesia was deepened with nembuthal injected intraperitoneally. The chinchillas were then transcardially perfused with 0.4 L of 4% buffered paraformaldehyde, and testes, epididymides, and vasa deferentia were collected. The tunica albugínea from one testis from each chinchilla was stained as whole-mount preparation. The tissues were cut into 12 µm-thick cryostat sections, and processed for double-immunofluorescence method. In all organs studied, the most abundant nerve fibres were dopamine ß hydroxylase positive (DßH⁺). Some of them contained neuropeptide Y (NPY). Sporadically NPY-positive-only nerve fibres were found. Single DßH⁺ nerve terminals contained also galanine. Small numbers of the nerve fibres supplying studied organs were stained for substance P (SP) and calitonin gene related peptide (CGRP). Almost all SP⁺ fibres were also CGRP⁺, whereas single CGRP⁺ nerves were SP- immunonegative. Some nerve terminals were immunoreactive to vesicular acetylcholine transporter and vasoactive intestinal peptide. The organs studied were innervated unevenly. The highest density of the nerves was found in the areas of the tunica albuginea adjacent to the mesorchial border of the testis and their number gradually decreased towards the free border of the gonad. None of the vascular tissue of the testicular parenchyma was free of the nerve fibres, except sporadically encountered DßH⁺ nerves which supply seminiferous tubules. Within the head of the epididymis a moderate number of nerve terminals were found, but in the body and tail of the organ the number of nerves gradually increased. The vas deferens was supplied with very numerous nerve fibres. There were no differences in the density of the innervation between the funicular and abdominal part of the vas deferens.

LXR regulate cholesterol homeostasis in the proximal mouse epididymis

72%

Ouvrier A. , Cadet R. , Lobaccaro J.-M. A. , Drevet J. R. , Saez F.

nr 5

Glutathione conjugation in male reproductive system: studies on glutathione-S-transferase of bull and boar epididymis

58%

Ciszewska-Pilczynska A. , Baranczyk-Kuzma A.

nr 1

Male reproductive organs are extremely sensitive to the negative influence of toxic environmental factors as well as drugs, and until now not many attempts have been made at studying the detoxication enzymes and the relationship between the activity of those enzymes and spermatozoa fertility. In the present work we studied cytosolic glutathione-S-transferases (GST, EC 2.5.1.18) from different parts (head, corpus and tail) of bull and boar epididymis. We isolated two molecular forms of GST from each part of epididymis, characterized their biochemical properties and examined the mechanism of the catalyzed reaction. On the basis of their substrate specificity and isoelectric point, the isoforms were found to belong to the near neutral GST class mi. All examined GST forms exhibited higher affinity towards GSH than towards 1-chloro-2,4-dinitrobenzene (CDNB) and bull epididymis GST forms showed biphasic Lineweaver-Burk double reciprocal curves in the presence of GSH as a variable substrate. Boar epididymis anionic GST had the -SH groups both in the GSH and the CDNB binding place, whereas the cationic GST form arginine residues in the CDNB binding place. Bull epididymis GST forms contained neither thiol nor arginine residues essential for catalytic activity.