Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0039584 (Testes)
 1,006 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Testis and liver histology, and pituitary-testicular function were studied in thirty chronic alcoholics. Severe reduction of spermatogenesis was found in 30% and in these patients serum follicle stimulating hormone and prolactin concentrations were significantly higher. There was no correlation between abnormalities in the liver and testis. The serum testosterone was normal in most cases. Sexual dysfunction and testicular atrophy occurred in more than half of the patients and were not related to liver disease. Testicular disorder in chronic alcoholism may be independent of liver disease.
Eur J Clin Invest 1978 Oct
PMID:Pituitary-testicular function in patients with chronic alcoholism. 10 16

The skin response in guinea pigs at various times after immunization with epididymal sperm in Freund's complete adjuvant is reported. Findings were correlated with the progression of the autoimmune orchitis. Also, possible skin reactivity to sperm extract at 8 months after bilateral vasectomies in which both ends of the vasa had been ligated was investigated. The histological changes in the testes at 5 months postvasectomy were studied. Epididymal sperm was obtained by flushing out the vas and epididymis of mature guinea pigs. The dried epididymal sperm was used for immunization, dissolved or suspended in PBS. For skin testing, a heat-treated extract of the sperm (BES) was used. The methods of preparing reagents is described. The skin reactions to BES and to a purified protein derivative (PPD) in females were similar to those of any standard protein antigen. In males, this reaction resembled that in females at 1 week after immunization but later was different. Induration and erythema were greater in females (p less than .001) from 2 weeks on. The response of males to PPD was less than in females at 1 week but at 2 weeks was the same. Males immunized with purified ovalbumin responded to PPD similarly to females. After 8 months, following vasectomy, the response to BES at 24 hours was similar to that of controls. Testes weighed at 1 week after immunization were increased, possibly due to edema, but after the 3rd week weight was decreased. Histology of the testes after immunization showed cellular infiltration after 2 weeks and disappearance of spermatogenic elements from the seminiferous tubules. Evidence of delayed hypersensitivity to sperm was not shown.
Clin Exp Immunol 1976 Apr
PMID:Comparison of allergic aspermatogenesis with that induced by vasectomy. I. In vivo studies in the guinea-pig. 94 75

Ethanol ingestion by pregnant women can result in the development of the fetal alcohol syndrome in their progeny. To investigate the late consequences of maternal ethanol ingestion upon male progeny, pregnant dams were administered ethanol-containing liquid diets from the 12th day of gestation to 10 days postpartum and their male progeny were compared to those of offspring obtained from dams isocalorically fed a liquid diet without alcohol in which Dextri-Maltose isocalorically replaced the ethanol of the ethanol-containing diet and those of dams fed a standard rat chow ad libitum. A significant decrease in body weight at birth (p less than 0.0001), at weaning, and at 55 days of age (postpuberty) (p less than 0.005) was found for the in utero ethanol-exposed animals as compared to that of the animals obtained from the two control groups. Anogenital distances and indices (measures of masculinity) in the male progeny were reduced (p less than 0.001) on days 1 and 5 in the alcohol-exposed animals as compared to those of the two control groups. Testes and prostate-seminal vesicle weights of the alcohol-exposed animals were reduced on day 55 (p less than 0.05) and again on day 110 (p less than 0.01) as compared to those of the two control groups. Similarly, serum testosterone and luteinizing hormone levels were reduced significantly on day 55 (p less than 0.05) in the alcohol-exposed animals but not in the controls. No difference was noted at 110 days of age in testosterone and LH (luteinizing hormone) levels between the various groups.(ABSTRACT TRUNCATED AT 250 WORDS)
Alcohol Clin Exp Res
PMID:Effects of in utero exposure to alcohol upon male rats. 390 7

The effect of testosterone on organ-specific spontaneous autoimmune thyroiditis (SAT) was examined in two strains of chicken: the Obese (OS) strain, which develops SAT at several weeks of age and the control Special C (Sp. C) strain. Both were originally selected from the C strain and are homozygous for the B13 major histocompatibility haplotype. Testes development and testosterone levels in the OS strain were considerably less than those found in comparably aged birds of the Sp. C strain. Testosterone supplementation of the OS strain significantly decreased thyroid infiltration by lymphocytes while castration of the Sp. C strain significantly enhanced infiltration. These results suggest that testosterone reduces SAT and that the hormonal constitution in both strains of chicken affect the frequency of occurrence and severity of this disorder.
Clin Immunol Immunopathol 1985 Jul
PMID:Effects of testosterone on the development of autoimmune thyroiditis in two strains of chicken. 403 96

The morphological alterations of the chromosomes in male dogs caused by long-termed progesterone treatment were studied in male dogs receiving either 1, 5, 10 or 25 mg progesterone injected in every other day for 6 weeks, followed by an 8 week recovery period. For comparison, several other dogs received medroxyprogesterone acetate, estradiol-17beta, chorionic gonadotropin and testosterone. Testes were biopsied prior to treatment and at 1, 2, 4, 6, 10 and 14 weeks after the first injection. Characteristic chromosomal changes were seen in all dogs receiving progesterone including stickiness and clumping and prominent aneuploidy and polypoidy, with the extent of the damage directly related to the dose level. These alterations were found in all phases of meiosis studied as well as in the spermatogonial metaphases. By Week 6 spermatogenesis had been halted in all animals and as early as Week 2 in the dogs receiving the 25 mg dose. Regrowth during the recovery period was incomplete and variable and the dose relationship was less well-defined. Administration of medroxyprogesterone acetate resulted in similar chromosomal alterations but the tissues were not affected by the other nonprogestational hormones tested. Further research is needed into the mechanism of progesterone's antispermatogenetic effect and the long-range effect of such progesterone treatment on fertility.
J Lab Clin Med 1971 Mar
PMID:Chromosome alterations produced in germ cells of dogs by progesterone. 555 26

The WHO International Classification of Testes Tumors has been briefly discussed. The classification divides the tumors into those of a single cell type and those of more than 1 cell type. Seven basic histological categories are recognized: seminoma, spermatocytic seminoma, embryonal carcinoma, yolk sac tumor, polyembryoma and teratoma. The classification correlates well with tumor markers and with clinical behavior.
Prog Clin Biol Res 1984
PMID:Tumor markers and pathology of testicular tumors. 620 11

Age-related changes in Leydig cell number, daily sperm production, and circulating hormone levels were studied in 15 men between 20 and 48 yr of age and 15 men between 50 and 76 yr of age. Testes and blood samples were obtained at autopsy less than 15 h after death due to trauma or heart attack. Leydig cell number was determined by quantitative histometric estimation of the proportion of glutaraldehyde-perfused, decapsulated testicular parenchyma occupied by Leydig cell nuclei of measured average volume in both testes of each subject. Daily sperm production was determined by phase contrast cytometry of round spermatid nuclei in homogenates of both fixed testes from each individual. LH, FSH, PRL, and testosterone in serum from the heart or large veins were quantified by RIA. No relationship was detected between any of the testicular or hormonal values and postmortem time. The average total number of Leydig cells was reduced by 44% in the older men and was negatively correlated with age (p = -0.62) in all men. Mean serum LH was elevated more than 2-fold in the older men and was positively correlated with age (p = +0.53) in all men. Neither serum testosterone nor serum PRL changed significantly with age. Daily sperm production was more than 50% lower in older men and was negatively correlated with age (p = -0.76) in all men. Serum FSH was more than 3-fold higher in the older men and was positively correlated with age (p = +0.72) in all men. The highest FSH levels were found in men with the lowest rates of sperm production, and FSH and daily sperm production were inversely correlated even after the effects of age were removed. These findings show that the response of the human testis to aging is variable and that the predictive value of age for most testicular characteristics is weak at the level of individual men. Nevertheless, age accounts for more than a third of the variation in Leydig cell number, and it explains more than half the variation in daily sperm production. Hence, age is the largest single contributing factor yet identified in the search for explanations underlying the variation in testicular structure and function found in groups of normal men.
J Clin Endocrinol Metab 1984 Oct
PMID:Leydig cell numbers, daily sperm production, and serum gonadotropin levels in aging men. 643 79

Fertility is a fragile parameter that may vary temporarily or be permanently depressed. The bull's ability to maintain body condition and the existence of conformational abnormalities may alter fertility. Abnormalities of the external genitalia may directly affect the bull's ability to copulate or may alter the quality of his semen. Testicular disease alters semen quality, sometimes transiently and other times permanently. In many cases, the fertility prognosis for testicular problems cannot be judged on the basis of one examination. Epididymitis and seminal vesiculitis are the two most common diseases of the secondary sex organs of the bull. They are often associated with each other or orchitis and are difficult to treat.
Vet Clin North Am Food Anim Pract 1997 Jul
PMID:Common causes of infertility in the bull. 921 44

Sex steroid-based male contraceptive regimens do not induce consistent azoospermia. The reason for this variable response is obscure. We used normal adult male monkeys, Macaca fascicularis (n = 9) as a model of testosterone (T)-induced gonadotropin suppression to understand the basis for variability in spermatogenic suppression during hormonal contraception. As observed in men, T administration to these monkeys induced azoospermia in some animals and variable degrees of spermatogenic suppression in others. Based on their sperm counts, we divided these animals into two groups: azoospermic (azoo; n = 4) and nonazoospermic (nonazoo; n = 5) groups. Sperm density, testis volumes, and serum T, bioassayable LH (bioLH), immunoassayable FSH (immunoFSH), bioassayable FSH (bioFSH), and inhibin B were examined every 2 wk during the control period, 20 wk of T administration using SILASTIC brand (Dow Corning Corp.) implants, and recovery. Testes were biopsied for estimation of intratesticular T, dihydrotestosterone, and 5alpha-androstane-3alpha,17beta-diol. Serum T levels increased 1.5- to 2-fold, leading to decreased bioLH levels (48% of control) and intratesticular T levels (15% of control); neither LH nor intratesticular T levels differed between the azoo and nonazoo groups. In contrast, serum levels of FSH, by both bio- and immunoassay, during T administration were significantly lower in the azoo than in the nonazoo group. These results suggest that the degree of suppression of spermatogenesis is closely related to the degree of suppression of FSH levels and not to the levels of intratesticular androgens or to serum LH. These results imply that FSH plays a key role in supporting spermatogenesis in monkeys in this experimental regimen and suggest that maximal suppression of FSH may be essential to ensure consistent azoospermia in men during hormonal contraception.
J Clin Endocrinol Metab 2002 Jul
PMID:Variability in sperm suppression during testosterone administration to adult monkeys is related to follicle stimulating hormone suppression and not to intratesticular androgens. 1210 57

Programmed cell death and proliferation are evolutionary conserved processes that play a major role during normal development and homeostasis. In the testis, during the fetal and newborn periods, they might determine final adult size and fertility potential. In the present study, we have measured the relative number of testicular cells in apoptosis and in active proliferation in the seminiferous cords and in the interstitium, at different age periods of prepubertal testicular development in humans. Testes from 44 prepubertal subjects without endocrine and metabolic abnormalities were collected at necropsy. They were divided in three age groups (Gr): Gr 1, newborn (1- to 21-d-old neonates), n = 18, mean (+/-SD) age 0.3 +/- 0.23 months; Gr 2, post natal activation (1- to 6-month-old infants), n = 13, mean age 3.93 +/- 1.90 months; and Gr 3, early childhood period (1- to <6-yr-old boys), n = 13, mean age 31.5 +/- 18.9 months. Apoptosis was detected in 5- microm tissue sections using a modified terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling assay and cell proliferation was assessed by Ki-67 immunohistochemistry. Evaluation of apoptosis was confirmed by estimation of active caspase-3. Mean (+/-SD) testicular weight was 0.38 +/- 0.20, 0.54 +/- 0.35, and 0.51 +/- 0.11 g in Gr 1, Gr 2, and Gr 3, respectively. In Gr 1, there was a significant positive correlation between age and testis weight (P = 0.02). Mean (+/-SD) germ cell apoptotic index, AI, (% of apoptotic cells out of total cell number) was 15.0 +/- 6.60, 27.0 +/- 8.80 and 33.4 +/- 11.4 in Gr 1, Gr 2, and Gr 3, respectively. In Sertoli cells, it was 6.60 +/- 4.07, 22.0 +/- 14.0 and 27.5 +/- 19.8, respectively. In interstitial cells, it was 10.2 +/- 6.38, 18.0 +/- 6.70 and 25.7 +/- 15.5, respectively. In the three types of cells, AI in Gr 1 was significantly lower than in Gr 2 or Gr 3 (P < 0.05). Mean (+/-SD) germ cell proliferation index, PI, was 18.6 +/- 13.0, 10.0 +/- 6.50 and 10.9 +/- 6.24% in Gr 1, Gr 2, and Gr 3, respectively. In Sertoli cells and in interstitial cells PI was similar in the three age groups. The PI/AI ratio was used to compare relative differences among age groups. The PI/AI ratio of germ cells, Sertoli cells and interstitial cells in Gr 1 was significantly higher than in Gr 2 or Gr 3 (P < 0.05). It is concluded that, in normal subjects, there is a vigorous growth of the testis during the newborn period with subsequent stabilization during the first years of prepuberty. This cell growth seems to be mainly mediated by decreased apoptosis. The factors that modulate apoptosis of testicular cells are not known, but it is remarkable that this change takes place before the testosterone peak of the post natal gonadal activation of the first trimester of life. These changes taking place during the newborn period might be important to define testicular function in adults.
J Clin Endocrinol Metab 2002 Nov
PMID:Apoptosis and proliferation of human testicular somatic and germ cells during prepuberty: high rate of testicular growth in newborns mediated by decreased apoptosis. 1241 80


1 2 Next >>