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Showing 1 to 20 of 25 for “"epididymis"”.
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Preservation of sperm harvested from the rat, caprine, equine, and bovine epididymis
The interest in preserving endangered species has increased the amount of attention lent to the recovery of functional sperm from the epididymides of deceased males (Foote, 2000). Postmortem specimens have a finite time period before decomposition affects functionality. Determination of this …
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Activity of Sodium Ion, Potassium Ion in the Epididymis of the Rat
… efferentes and the initial segment of the epididymis of the rat. Electron microscopic localization of Na$\sp+$,K$\sp+$-ATPase demonstrated enzyme activity along the cytoplasmic side of the plasmalemma of the ductal epithelial cells. The most intense deposition of reaction products was found …
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P450 aromatase expression in germ cells and sperm of the adult mouse and rat testis and epididymis
… of P450arom in sperm as they traverse the epididymis; (2) adult rat testicular germ cells and epididymal sperm contain active P450arom, and there is a decrease in the immunocytochemical expression and activity of P450arom in sperm as they traverse the epididymis; and (3) P450arom mRNA is …
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The Role of Estrogen Receptor Alpha in Epididymal Sperm Structure and Function
… are infertile and sperm recovered from the cauda epididymis exhibit reduced motility and fail to fertilize eggs in vitro. These effects on sperm appear to result from defective epididymal function and not a direct effect on spermatogenesis, as ERalphaKO germ cells transplanted into wildtype testes …
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Correlative Analysis of Sperm Morphology, Seminiferous Epithelial Area and Testis Weight in the Boar
… Sperm samples from both right and left cauda epididymis of each boar were collected from which two groups were identified using the criterion in the frequency of sperm abnormalities. Group A (Normal) had a frequency of abnormal spermatozoa considered to be consistent with normal fertility; and …
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Biologia reprodutiva de Artibeus lituratus (Olfers, 1818) (Chiroptera: Phyllostomidae)
… in females and accessory glands, testis and epididymis in males. A lituratus is a monovular species since only one corpus luteum was found in each ovary and both ovaries are functional. A particular aspect is the engorgement of the oviductal epithelium with a PAS - substance during pre and …
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Pengaruh pemberian ekstrak etanol jintan hitam (Nigella sativa) terhadap integritas membran spermatozoa dan kadar malondialdehyde (MDA) epididimis mencit yang dipapar timbal (Pb) esetat peroral
… the process of maturation of spermatozoa in the epididymis. This can be overcome by administration of ethanol extract of black cumin contains thymoquoinone which act as antioxidants. Therefore the aim of this study to determine the effect of ethanol extract of black cumin on levels of …
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Estrogen Receptor-Mediated Gene Expression in Cultured Epithelial Cells of Rat Efferent Ductules
… in the efferent ductules and the head of the epididymis. However, knowledge of estrogen effects in the male reproductive tract is limited. In some species, concentrations of estrogens in testicular fluid are higher than in blood. A recent study in estrogen receptor knockout mice also showed an …
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Autophagy maintains the homeostatic environment in the male reproductive organs playing a key role in fertility
… during the phase of sperm maturation in the epididymis and seminal fluid production from the accessory sex organs remains unknown. Using a doxycycline-inducible short hairpin (shRNA) mouse model (called ATG5i) targeting Atg5, we created a mouse model that demonstrates ubiquitous inhibition of …
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Dissecting the spatio-temporal development of the human reproductive tract
… the rostral mesenchyme of the fallopian tube and epididymis. The atlas further revealed that epithelial regionalisation of the fallopian tube and epididymis, likely supporting functions such as sperm maturation in adulthood, is established early in development. In contrast, the uterocervical canal …
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Mouse hybrid sterility genes linked to chromosome X
… exhibiting smaller testes, no sperm in the epididymis, meiotic pachytene arrest, and high rates of asynapsed autosomes. The first hybrid sterility locus in vertebrates was mapped to chromosome 17 and named Hybrid sterility 1 (Hst1), which was later identified as Prdm9 gene. The …
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Endocrine, cellular and molecular effects of diabetes mellitus on male fertility
… of AGE and RAGE were evaluated in the testis, epididymis and sperm using immunohistochemistry, immunocytochemistry and an Enzyme Linked Immunoabsorbant Assay. The AGE - N-e-Carboxymethyl-lysine (CML) and RAGE were found throughout the testis and epididymis. In sperm a characteristic pattern of …
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Dynamic changes of TDP-43 in testicular and epididymal sperm
… are functionally immature; spermatozoa enter the epididymis where biochemical changes lead to sperm maturation and ability to swim. However, the processes of epididymal maturation are unknown; therefore, one goal of this study was to determine the localization and biochemical changes of TDP-43 in …
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Ανωμαλίες συνένωσης όρχεως - επιδιδυμίδας στην κρυψορχία: Ανατομικές παραλλαγές και κλινική σημασία
… ή ορχεο – επιδιδυμικός διαχωρισμός (Testicular Epididymis Fusion Anomalies) περιγράφουν ένα φάσμα ανατομικών ανωμαλιών που κυμαίνονται από μερική σύζευξη έως και τον πλήρη ορχεο – επιδιδυμικό διαχωρισμό και αποτελούν τις συχνότερες μορφολογικές ανωμαλίες που συνυπάρχουν με την κρυψορχία. …
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Expression and functional analysis of <i>Tex18</i> and <i>Stra8</i> genes in male germ cells
… Obwohl die Anzahl der Spermien in der Cauda epididymis im Vergleich zur WT- Kontrolle nicht reduziert war, zeigten beide Hintergründe bei VP- Tests eine reduzierte Anzahl an Spermien im Uterus und im Ovidukt. Reduzierte Motilität und unnatürliche Bewegung der Spermien konnte bei beiden …
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Localization of nerve growth factor-β in the stallion reproductive tract
… within the testes and in epithelial cells of the epididymis. In conclusion, immunohistochemistry revealed that NGF-β is present in the stallion reproductive tract and the protein is primarily present in the efferent ducts of the testes and in all accessory sex glands.
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The development of motility in spermatozoa
… capacity for motility during passage through the epididymis. This study on rat spermatozoa shows that pH, cAMP and protein kinase C (PKC) all play an important role in the initiation of motility. pH has the most critical role and until the initial pH change in spermatozoa has occurred between the …
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MORPHOLOGICAL FEATURES OF THE REPRODUCTIVE ORGANS IN DOMESTIC SPECIES IN RELATION TO WATER MOVEMENT CONTROL, HYPONUTRITION AND ENVIRONMENTAL INFLUENCES IN FETAL AND PREPUBERTAL LIFE, AND METABOLISM REGULATOR FACTORS.
… considered first of all the role of AQPs in the epididymis of a domestic species, the cat, and two animal models, the rat and the lamb. Ultrastructural features of the epithelium lining the efferent ducts (ED) in the cat, as in other mammalian species, are strongly indicative of an absorptive …
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Molecular Interactions During Fertilization: Sperm -Egg Binding and Regulation of the Acrosome Reaction
… ability was acquired in the corpus of the epididymis, correlating with the developmental stage at which sperm become fertilization competent. A library of phage displaying peptides derived from boar testis was screened for candidate porcine zona pellucida receptors; however, a viable …
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Development and Characterization of Monoclonal Antisperm Antibodies: Potential for Contraception
… seen on sperm cells in testis, caput- and cauda epididymis, and vas deferens. Four of these antisperm MAbs were against epididymal antigens, three were against seminal vesicle factors, and seven were against testis specific antigens. These evaluations indicated sperm specificity of these …
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