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Effect of immobilization stress on testosterone and inhibin in male rats
immobilization stress testosterone inhibin male rats
2009/2/23
Adult male Wistar rats were subjected to acute and chronic immobilization stress. Changes in plasma levels of LH, FSH and testosterone and in the content of testicular inhibin and testosterone wer...
Effect of gonadotropin-releasing hormone on prolactin levels in males unrelated to stress or behavioral changes
gonadotropin-releasing hormone prolactin levels males
2009/2/23
Hormone levels, physiologic parameters, electroencephalographic (EEG) activity, and changes in subjective feelings recorded using a nonverbal instrumental device were assessed following the double-b...
Oxidative stress differentially regulates the expression of gamma-glutamyl transpeptidase mRNAs in the initial segment of the rat epididymis
gamma-glutamyl transpeptidase mRNAs initial segment rat epididymis
2009/2/17
Reactive oxygen species (ROS) have a powerful cytotoxic effect on spermatozoa and have been implicated in spermatozoal dysfunction and male infertility. gamma-Glutamyl transpeptidase (GGT) is esse...
Effects of heat stress on mouse testicular cells and sperm chromatin structure
Testicular heat stress SCSA
2009/2/17
Scrotal regions of mice were exposed to a 38.0, 40.0, or 42.0 degrees C (+/-0.1) H2O bath for 60 minutes to determine the effects of elevated temperatures on testicular cells and sperm chromatin str...
Expression of clusterin/sulfated glycoprotein-2 under conditions of heat stress in rat Sertoli cells and a mouse Sertoli cell line
SGP-2 testis HSP7O
2009/2/17
Clusterin is the major protein produced by rat Sertoli cells and is deposited onto sperm membranes; however, its function is unknown. In order to gain insight into the regulation of clusterin in Serto...
Effects of psychological stress on human semen quality
psychological stress human semen quality
2009/2/17
We investigated the relationship between psychological stress and sperm concentration, motility, and morphometry in a prospective study of 157 volunteers who were enrolled in a prepaid health plan. ...
Heat stress causes testicular germ cell apoptosis in adult mice
Spermatogenesis testis cryptorchidism
2009/2/17
An investigation was undertaken to determine whether the germ-cell loss associated with exposure of the testis to abdominal temperature occurs by apoptosis. Using an adult-mouse model of experimenta...
Oxidative stress and male infertility
Seminal plasma reactive oxygen species antioxidants infertility
2009/2/16
We have studied the activity of substances (superoxide dismutase [SOD], catalase [Cat], malonaldehyde, xanthine oxidase [XO], nitric oxide [NOx]) participating in oxidative stress. Seminal plasma sa...
Effects of long-term psychological stress on sexual behavior and brain catecholamine levels
Psychological stress sexual behavior Catecholamines
2009/2/16
The effects of long-term psychological stress on sexual behavior and brain catecholamines were investigated in rats. Stress was applied using the communication box developed by Ogawa and Kuwabara ...
Mechanism of stress-induced attenuation of the testicular response to gonadotropin：possible involvement of testicular opioids, a pertussis toxin-sensitive G-protein, and phosphodiesterase
stress-induced attenuation possible involvement testicular opioids pertussis toxin-sensitive G-protein
2009/2/16
This study examined the potential role of testicular opioids, a pertussis toxin (PT)-sensitive G-protein, and phosphodiesterase in mediating the inhibitory effect of immobilization stress on testi...
Role of oxidative stress and antioxidants in male infertility
oxidative stress antioxidants male infertility
2009/2/13
Oxygen toxicity is an inherent challenge to aerobic life, including spermatozoa, the cells responsible for propagation of the species. How this toxicity affects the spermatozoan in its interactions wi...
Leukocytic infiltration into the human ejaculate and its association with semen quality, oxidative stress, and sperm function
Leukocytes reactive oxygen species sperm function
2009/2/12
Immunocytochemical techniques have been used to monitor the size and composition of the leukocyte population in unfractionated human semen samples and sperm populations generated by Percoll gradie...
Acute immobilization stress disrupts testicular steroidogenesis in adult male rats by inhibiting the activities of 17 alpha-hydroxylase and 17,20-lyase without affecting the binding of LH/hCG receptors
Stress rats testosterone 17a-hydroxylase
2009/2/12
We have investigated the effect of acute immobilization (3 hours) stress on testicular steroidogenesis in the adult rat. Immobilization did not alter plasma luteizing hormone (LH) levels, but plas...
Evidence that membrane stress contributes more than lipid peroxidation to sublethal cryodamage in cryopreserved human sperm: glycerol and other polyols as sole cryoprotectant
Human sperm cryopreservation cryoprotectant sublethal cryodamage lipid peroxidation membrane stress
2009/2/12
One effect of cryopreservation on human sperm is sublethal cryodamage, in which cell viability post-thaw is lost more rapidly at later times than in fresh cells. We hypothesized two modes of suble...
Relationship between seminal white blood cell counts and oxidative stress in men treated at an infertility clinic
Leukocytospermia male infertility semen reactive oxygen
2008/12/29
In semen, granulocytes are major producers of reactive oxygen species (ROS), which can damage sperm. The diagnosis of leukocytospermia is usually based on the World Health Organization (WHO) definitio...