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Quality control during the conventional analysis of semen, an essential exercise
Quality control conventional analysis semen essential exercise
2009/2/23
Intra- and inter-technician variability in assessing sperm motility by the methods recently advocated by the World Health Organization (WHO) were studied. The intra- and inter-technician variability...
Possible role of elongated spermatids in control of stage-dependent changes in the diameter of the lumen of the rat seminiferous tubule
elongated spermatids stage-dependent changes rat seminiferous tubule
2009/2/23
Adult male rats were treated with a single dose of 650 mg/kg methoxy acetic acid to deplete the seminiferous tubules specifically of pachytene and later spermatocytes. The effect of this treatment a...
Characterization and localization of beta-adrenergic receptors in control and cryptorchidized rat testis by in vitro autoradiography
$-adrenergic receptors autoradiography cryptorchidectomy rat testis Sertoli cells
2009/2/23
beta-adrenergic receptors were localized and characterized in control and cryptorchidized rats to investigate further their role in testicular function. Slide-mounted cryostat sections were incubate...
The role of endogenous opioid peptides in the control of androgen levels in the male nonhuman primate
morphine endorphin enkephalin naloxone
2009/2/20
Plasma androgen levels studied following the injection of the opioid agonists morphine sulfate (0.5-1.0 mg/kg), beta-endorphin (10-20 mg/kg), and [D-Ala2, D-Leu5]-enkephalin (DADLE; 5-20 microgram...
Control of metastases in the Nb rat prostatic adenocarcinoma model
metastases Nb rat prostatic adenocarcinoma model
2009/2/20
Chemotherapeutic agents, as well as acetyl-salicylic acid, heparin, and indocin, were evaluated in regard to their effect on the rate of metastasis in the androgen-insensitive Noble rat prostate a...
Ultrastructure and intercellular vacuolization of isolated perfused and control rat testes
testis perfusion rat ultrastructure
2009/2/20
Isolated rat testes perfused in closed circuit with albuminated Krebs-Ringer bicarbonate buffer were examined by light and electron microscopic techniques in order to assess the structural integrity...
Control of Rat Testicular Prostaglandin Dehydrogenase, 13-Prostaglandin Reductase, and Total Prostaglandin Dehydrogenase Activities
rat testicular prostaglandin dehydrogenase hypophysectomy luteinizing hormone follicle stimulating hormone
2009/2/19
The effects of hypophysectomy and various hormonal treatments on rat testicular prostaglandin dehydrogenase (PGDH), 13-PG reductase, and total PGDH activities were studied in vivo and in vitro. Al...
The Suitability of Silver and Platinum Coils as Intravasal Devices for Male Fertility Control in Rats
male fertility control intravasal devices surgical methods
2009/2/18
In 91 male rats, silver or platinum coils were implanted into the vasa deferentia with the hope of developing a simple and reversible method for male fertility control. The insertion of the coil by ...
Pituitary control of proliferation and differentiation of Leydig cells and their putative precursors in immature hypophysectomized rat testis
Testis rat development Leydig cells steroidogenesis
2009/2/17
The objective of this study was to determine the effects of pituitary hormones (luteinizing hormone [LH], follicle-stimulating hormone [FSH], growth hormone [GH], and prolactin [PRL]) on interstit...
Descent of the testes is a complex event mediated by hormonal and mechanical factors. At present we hypothesize that testicular descent occurs as the result of the secretion of descendin from a no...
S-adenosyl-L-methionine decarboxylase activity in the rat epididymis：ontogeny and androgenic control
S-adenosyl-L-methionine androgen flutamide
2009/2/7
The authors describe the occurrence of high levels of S-adenosyl-L-methionine decarboxylase (SAMDC) activity in the rat epididymis, and its ontogeny and androgenic control. As early as 15 days of ag...
Structure and control of a cell-cell adhesion complex associated with spermiation in rat seminiferous epithelium
Cadherins cell adhesions control integrins spermiation
2008/12/29
Spermiation, the release of late spermatids from the Sertoli cell, is disrupted by a number of toxicants. Control of the spermiation process, and the proteins that interact to adhere mature spermati...
Quality control of reactive oxygen species measurement by luminol-dependent chemiluminescence assay
Semen spermatozoa luminol oxidative stress male
2008/12/29
A total of 28 donor semen samples were used to evaluate the characteristics of laboratory variability in measuring reactive oxygen species (ROS). The objectives of this study were to assess the intera...
Standardization and Quality Control for Determination of Fructose in Seminal Plasma
Standardization Quality Control Fructose Seminal Plasma
2008/12/24
In this age of evidence-based medicine, there is nothing more important than the quality of lab tests (Westgard and Darcy, 2004). However, reliability of semen analysis has been suspected for lack o...
Regulatory Cytokine Expression and Interstitial Fluid Formation in the Normal and Inflamed Rat Testis Are Under Leydig Cell Control
Transforming growth factor-ß interferon- macrophage migration inhibitory factor ethane dimethane sulfonate testosterone
2008/12/23
Leydig cells have been implicated in several inflammation-related responses of the testis. Specifically, these cells produce the proinflammatory cytokines interleukin-1 (IL-1) and IL-6, stimulate ma...