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Circadian variation in testosterone, sex hormone-binding globulin, and calculated non-sex hormone-binding globulin bound testosterone in healthy young and elderly men
Circadian variation testosterone sex hormone-binding globulin healthy young and elderly men
2009/2/23
The circadian pattern in levels of serum total testosterone (T) in men becomes blunted with normal aging. However, because T not bound to sex hormone-binding globulin (non-SHBG-T) is felt to be a be...
Variation in the effect of a nongonadotropic Leydig cell stimulating factor in testicular interstitial fluid after exposure of the testis to a single episode of heat treatment
Variation nongonadotropic Leydig cell testicular interstitial fluid testis
2009/2/23
The activity of a nongonadotropic factor present in rat testicular interstitial fluid and capable of stimulating Leydig cell testosterone production was measured at intervals for 8 weeks after exp...
Age-related variation in seminiferous tubules in men. A stereologic evaluation
Age-related variation seminiferous tubules men
2009/2/23
Tubular boundary tissue and seminiferous epithelia were evaluated stereologically in testes from 28 men aged 20 to 48 years and 28 men aged 50 to 90 years. Testes obtained at autopsy within 15 hours...
Regional variation in macrophage antigen expression by murine epididymal basal cells and their regulation by testicular factors
Epididymis efferent duct ligation F4/80 Mac-i
2009/2/18
Factors controlling the appearance in the epididymis of basal cells and their expression of macrophage antigens were examined by ligating the efferent ducts to prevent the entry of spermatozoa in ad...
Regional variation in macrophage antigen expression by murine epididymal basal cells and their regulation by testicular factors
Epididymis efferent duct ligation F4/80 Mac-i
2009/2/18
Factors controlling the appearance in the epididymis of basal cells and their expression of macrophage antigens were examined by ligating the efferent ducts to prevent the entry of spermatozoa in ad...
Immunocytochemical localization of the Yf subunit of glutathione S-transferase P shows regional variation in the staining of epithelial cells of the testis, efferent ducts, and epididymis of the male rat
Epididymis testis basal cells glutathione S-transferase detoxification
2009/2/11
Glutathione S-transferases (GSTs) are a family of isozymes that catalyze the conjugation of glutathione (GSH), a tripeptide found in all mammalian cells; this function plays a protective role, as th...
Variation in semen parameters derived from computer-aided semen analysis, within donors and between donors
Concentration longitudinal study motility statistical
2008/12/29
The development of computer-aided semen analysis (CASA) has made it possible to study sperm motility characteristics objectively and longitudinally. In this 2-year study of 8 sperm donors, we used C...
Morphologically distinct sperm subpopulations defined by Fourier shape descriptors in fresh ejaculates correlate with variation in boar semen quality following cryopreservation
sperm subpopulations Fourier shape descriptors fresh ejaculates boar semen quality
2008/12/26
This study investigated two hypotheses: 1) that consistent between-boar variation in frozen semen quality exists and is genetically determined, and 2) that morphologically distinct subpopulations...
Response：Seasonal Variation and Age-Related Changes in Human Semen Parameters
Seasonal Variation Age-Related Changes Human Semen Parameters
2008/12/19
We thank Drs. Mendeluk and Curi for their letter regarding our recently published article, "Seasonal Variation and Age-Related Changes in Human Semen Parameters." It is interesting that they also fo...
Re：Seasonal Variation and Age-Related Changes in Human Semen Parameters
Seasonal Variation Age-Related Changes Human Semen Parameters
2008/12/19
The study of seasonal variation in human semen parameters has, in our opinion, two different aspects—individual and demographic. The first refers to the consideration of each patient by an evaluatio...
Seasonal Variation and Age-Related Changes in Human Semen Parameters
Epidemiology sperm concentration motility morphology
2008/12/19
Although semen quality has been discussed extensively with regard to age and season in the andrology literature, the results vary and firm conclusions are still outstanding. To investigate seasona...