TESTICULAR HISTO-MORPHOLOGY OF YOUNG RATS TREATED WITH OESTRADIOL-17β BENZOATE

1964 ◽  
Vol 46 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Manuel Maqueo ◽  
Fred A. Kind
Keyword(s):  
Leydig Cells ◽  
Post Treatment ◽  
Seminiferous Epithelium ◽  
Male Rats ◽  
Seminiferous Tubules ◽  
Pathological Changes ◽  
Testicular Damage ◽  
Oestrogen Treatment ◽  
Histological Studies ◽  
Oestradiol Benzoate

ABSTRACT Oestradiol-17β benzoate, 120 βg, injected into five-day old male rats inhibited maturation of the seminiferous epithelium as demonstrated by histological studies performed 40–55 days post-treatment. The oestrogen treatment was ineffective when administered at the age of 20 days. The degree of testicular damage appeared to be correlated with the amount of steroid used. A dose of 240 μg of oestradiol benzoate led to severe pathological changes in almost 100 per cent of the seminiferous tubules and atrophy of the Leydig cells.

scholarly journals Testosterone immunoreactivity in the seminiferous epithelium of rat testis: effect of treatment with ethane dimethanesulfonate.

1989 ◽  
Vol 37 (11) ◽  
pp. 1667-1673 ◽  
Author(s):  
R Schulz ◽  
F Paris ◽  
P Lembke ◽  
V Blüm
Keyword(s):  
Germ Cell ◽  
Germ Cells ◽  
Time Course ◽  
Seminiferous Epithelium ◽  
Male Rats ◽  
Plasma Testosterone ◽  
Seminiferous Tubules ◽  
Treatment Level ◽  
Cell Nuclei ◽  
Testicular Weight

Androgens drive spermatogenesis by processes that are largely unknown. Direct effects on germ cells and indirect effects mediated via testicular somatic elements are currently under consideration, and specific localization of androgens in seminiferous tubules may provide information as regards this. Adult male rats were injected with ethane dimethanesulfonate (EDS; 75 mg/kg body weight) or vehicle. Testes were fixed and paraffin-embedded for localization of testosterone immunoreactivity 1 and 2 weeks after treatment, using the unlabeled antibody (PAP) technique. Plasma testosterone dropped from a pre-treatment level of 2.3 ng/ml to below 0.2 ng/ml 3 days after EDS injection and remained at low levels until the end of observation, accompanied by a progressive decrease in testicular weight. In the seminiferous tubules of vehicle-injected males, testosterone immunoreactivity was found in nuclei of spermatocytes and spermatids and in nuclei and the cytoplasm of Sertoli cells, and showed typical variations according to the stage of spermatogenesis. One week after EDS treatment, immunoreactivity had disappeared from the seminiferous epithelium. Two weeks after treatment, staining of germ cells was detected in two out of four males. The disappearance and reappearance of immunoreactivity coincided with the time course of EDS effects on rat Leydig cells, and we conclude that it corresponds to androgen specifically localized in fixed, paraffin-embedded tissue. Because staining of germ cell nuclei varied with the stage of spermatogenesis, the technique may detect a physiologically relevant androgen fraction; its location suggests that androgens may also directly affect certain germ cell stages.

scholarly journals Hereditary Sterilizing Short-Tail Sperm Defect in Finnish Yorkshire Boars

2002 ◽  
Vol 14 (5) ◽  
pp. 382-388 ◽  
Author(s):  
Antti Sukura ◽  
Raili Mäkipää ◽  
Matti Vierula ◽  
Heriberto Rodriguez-Martinez ◽  
Pernilla Sundbäck ◽  
...  
Keyword(s):  
Leydig Cells ◽  
Testicular Tissue ◽  
Seminiferous Epithelium ◽  
Characteristic Change ◽  
Seminiferous Tubules ◽  
Light Microscopic Level ◽  
Tissue Samples ◽  
Tissue Sections ◽  
Typical Finding ◽  
And Control

A new infertility syndrome has recently been described in Finnish Yorkshire boars. Typical for the syndrome is total akinesia and severe tail malformation of the spermatozoa. Morphometric analysis was performed on semen smears from 20 affected and 18 control boars and on testicular tissue sections from 5 affected and 4 control boars. Semen morphometry revealed that, in affected boars, the length of the sperm tails was only 33% of that of the controls (15.4 μm vs. 47.0 μm, P < 0.0001). Typical for the spermatozoa of affected boars was also an abundant frequency of proximal cytoplasmic droplets (72.4% vs. 6.9%, P < 0.0001), whereas no major sperm-head abnormalities were recorded. In the testicular tissue samples, viewed at light microscopic level, the volume densities of seminiferous tubules or interstitium did not differ. The most characteristic change in the seminiferous epithelium of the affected boars was a reduced number of elongated spermatids. Densities of Sertoli cells and Leydig cells between affected and control boars did not differ. The ultrastructure of testicular tissue from affected boars showed severe alterations in the assembly of the midpiece and tail of the spermatozoa. As well, a typical finding in the seminiferous epithelium of affected boars was conspicuous deposition of lipid droplets. The pathogenesis of this syndrome severely affects spermiogenesis and motility. Spermatozoa have malformed, short tails, which never become motile. This syndrome is not manifested in the structure or function of other ciliated cells in the affected animals.

scholarly journals Axl Promotes Zika Virus Entry and Modulates the Antiviral State of Human Sertoli Cells

mBio ◽  
2019 ◽  
Vol 10 (4) ◽  
Author(s):  
Daniel P. Strange ◽  
Boonyanudh Jiyarom ◽  
Nima Pourhabibi Zarandi ◽  
Xuping Xie ◽  
Coleman Baker ◽  
...  
Keyword(s):  
Sertoli Cells ◽  
Zika Virus ◽  
Leydig Cells ◽  
Virus Entry ◽  
Seminiferous Epithelium ◽  
Seminiferous Tubules ◽  
Type I ◽  
Cell Type ◽  
Zikv Infection ◽  
Antiviral State

ABSTRACT Zika virus (ZIKV) is unique among mosquito-borne flaviviruses in its ability to be sexually transmitted. Persistent ZIKV infection in the testes, which are immune privileged organs, long after peripheral clearance suggests involvement of immunosuppressive pathways; however, the underlying mechanisms remain undetermined. We recently demonstrated that ZIKV infects human Sertoli cells (SC), the major cell type of the seminiferous epithelium responsible for maintaining the immune privileged compartment of seminiferous tubules. Recent reports have identified the TAM (Tyro3, Axl, Mer) receptor tyrosine kinase Axl as an entry receptor and/or immune modulator for ZIKV in a cell type-specific manner. Interestingly, the seminiferous epithelium exhibits high basal expression of the Axl receptor where it is involved in clearance of apoptotic germ cells and immunosuppression. Here, we show that Axl was highly expressed in SC compared to Leydig cells (LC) that correlated with robust ZIKV infection of SC, but not LC. Further, neutralization of Axl receptor and its ligand Gas6 strongly attenuated virus entry in SC. However, inhibition of Axl kinase did not affect ZIKV entry but instead led to decreased protein levels of suppressor of cytokine signaling 1 (SOCS1) and SOCS3, increased expression of interferon-stimulated genes (ISGs), and reduced ZIKV replication. Similarly, treatment of multicellular human testicular organoids with an Axl kinase inhibitor attenuated ZIKV replication and increased ISG expression. Together, our data demonstrate that Axl promotes ZIKV entry and negatively regulates the antiviral state of SC to augment ZIKV infection of the testes and provides new insights into testis antiviral immunity and ZIKV persistence. IMPORTANCE Recent Zika virus (ZIKV) outbreaks have identified sexual transmission as a new route of disease spread not reported for other flaviviruses. ZIKV crosses the blood-testis barrier and establishes infection in seminiferous tubules, the site for spermatozoa development. Currently, there are no therapies to treat ZIKV infection, and the immune mechanisms underlying testicular persistence are unclear. We found that multiple human testicular cell types, except Leydig cells, support ZIKV infection. Axl receptor, which plays a pivotal role in maintaining the immunosuppressive milieu of the testis, is highly expressed in Sertoli cells and augments ZIKV infection by promoting virus entry and negatively regulating the antiviral state. By using testicular organoids, we further describe the antiviral role of Axl inhibition. The significance of our research lies in defining cross talk between Axl and type I interferon signaling as an essential mechanism of immune control that can inform therapeutic efforts to clear ZIKV from the testis.

scholarly journals Protective effect of pyrrolidine dithiocarbamate against methotrexate-induced testicular damage

2021 ◽  
pp. 096032712110356
Author(s):  
Ozlem Delen ◽  
Yesim H Uz
Keyword(s):  
Single Dose ◽  
Protective Effect ◽  
Male Rats ◽  
Histological Evaluation ◽  
Seminiferous Tubules ◽  
Control Group ◽  
Pyrrolidine Dithiocarbamate ◽  
Related Factor ◽  
Nuclear Factor ◽  
Testicular Damage

The aim of the study was to investigate the protective effect of pyrrolidine dithiocarbamate (PDTC) against methotrexate (MTX)-induced testicular damage in rats. Forty Wistar albino male rats were divided into equally four groups: Control group (saline solution, IP), PDTC group (100 mg/kg PDTC,IP, 10 days), MTX group (20 mg/kg MTX, IP, single dose, on the 6th day) and MTX + PDTC group (100 mg/kg PDTC, IP, 10 days and 20 mg/kg MTX, IP, single dose, on the 6th day). After 10 days, testicular tissues were excised for morphometric, histological and immunohistochemical evaluations. Serum testosterone, follicle stimulating hormone (FSH), luteinizing hormone (LH) and prokineticin 2 (PK2) levels were determined. Body and testicular weights were measured. Testicular damage was assessed by histological evaluation. Nuclear factor kappa B (NFkB), nuclear factor erythroid 2 related factor 2 (Nrf2) and PK2 immunoreactivities were evaluated by HSCORE. Body and testicular weights, serum FSH, LH, testosterone levels, seminiferous tubule diameter and germinal epithelial thickness were significantly decreased in the MTX group. However, serum PK2 level, histologically damaged seminiferous tubules and interstitial field width were significantly increased. Additionally, there was an increase in NFkB and PK2 immunoreactivity, whereas there was a significant decrease in Nrf2 immunoreactivity. PDTC significantly improved hormonal, morphometric, histological and immunohistochemical findings. Taken together, we conclude that PDTC may reduce MTX-induced testicular damage via NFkB, Nrf2 and PK2 signaling pathways.

EFFECTS OF ANTI-OESTROGEN TREATMENT OF NEONATAL MALE RATS ON LORDOSIS BEHAVIOUR AND MOUNTING BEHAVIOUR IN THE ADULT

1978 ◽  
Vol 76 (2) ◽  
pp. 241-249 ◽  
Author(s):  
P. SÖDERSTEN
Keyword(s):  
Testosterone Propionate ◽  
Neonatal Rat ◽  
Male Rats ◽  
Glans Penis ◽  
Male Rat ◽  
Plasma Testosterone ◽  
Oestrogen Treatment ◽  
Oestradiol Benzoate ◽  
Sexual Glands ◽  
Lordosis Behaviour

Male rats were treated daily with 100 μg of the anti-oestrogen ethamoxytriphetol (MER-25) or oil during the first 10 days of life and tested for lordosis behaviour and mounting behaviour as intact adults, after castration and after castration and oestradiol benzoate or testosterone propionate treatment. The MER-25-treated rats showed higher levels of lordosis behaviour than oil-treated rats in all four treatment groups. Under each of these endocrine conditions, except after castration alone, the MER-25-treated rats showed a reduced capacity to ejaculate. Treatment of the neonatal rat with MER-25 reduced body weight in adulthood but did not change the weight of the accessory sexual glands, the testes, the number of cornified papillae on the glans penis or plasma testosterone concentrations during development. The response of the accessory sexual glands and cornified papillae on the glans penis to treatment with oestradiol benzoate or testosterone propionate after castration in adulthood was unaffected by treatment with MER-25. It is suggested that formation of oestrogen in the neonatal male rat brain from testosterone in the circulation inhibits the capacity to show lordosis behaviour and facilitates the capacity to ejaculate in response to gonadal hormone treatment in adulthood.

Interstitial fluid volume in the rat testis: androgen-dependent regulation by the seminiferous tubules?

1989 ◽  
Vol 120 (2) ◽  
pp. 215-NP ◽  
Author(s):  
S. Maddocks ◽  
R. M. Sharpe
Keyword(s):  
Leydig Cells ◽  
Interstitial Fluid ◽  
Single Injection ◽  
Fluid Volume ◽  
Male Rats ◽  
Seminiferous Tubules ◽  
Rat Testis ◽  
Adult Rat ◽  
Interstitial Fluid Volume ◽  
Dependent Mechanism

ABSTRACT Regulation of testicular interstitial fluid (IF) volume has been investigated in adult male rats in which the Leydig cells were selectively destroyed with a single i.p. injection of ethane dimethane sulphonate (EDS). Following this treatment, some animals also received testosterone supplementation by s.c. injection every 3 days, beginning either from the time of EDS injection, or 3–12 days afterwards. The volume of IF obtained by drip collection was determined, and testosterone and gonadotrophin concentrations measured in blood and in IF. Testosterone levels in IF and serum became undetectable by 3 days after EDS treatment. IF volume was reduced by 50% (P < 0·01) to reach a minimum level between 6 and 9 days after treatment. However, this decline was prevented in the absence of Leydig cells by supplementation with testosterone from the time of EDS injection, a treatment which also kept gonadotrophins at minimum or undetectable levels. Furthermore, the reduced IF volume seen up to 9 days after treatment with EDS alone could be restored to control levels within 3 days by a single injection of testosterone. The results obtained demonstrate that androgens, but not Leydig cells or gonadotrophins, are required for the maintenance of interstitial fluid volume in the adult rat testis. It is suggested that the seminiferous tubules may mediate this response, through an androgen-dependent mechanism. Journal of Endocrinology (1989) 120, 215–222

scholarly journals Leydig cell apoptosis in the rat testes after administration of the cytotoxin ethane dimethanesulphonate: role of the Bcl-2 family members

1998 ◽  
Vol 157 (2) ◽  
pp. 317-326 ◽  
Author(s):  
MF Taylor ◽  
I Woolveridge ◽  
AD Metcalfe ◽  
CH Streuli ◽  
JA Hickman ◽  
...  
Keyword(s):  
Cell Death ◽  
Leydig Cell ◽  
Leydig Cells ◽  
Family Members ◽  
Tumour Suppressor Gene ◽  
Male Rats ◽  
Seminiferous Tubules ◽  
Gene Products ◽  
Bax Protein ◽  
Ethane Dimethanesulphonate

Ethane dimethanesulphonate (EDS) is cytotoxic to Leydig cells in the adult rat. To investigate the role and regulation of apoptosis in the Leydig cell, EDS (100 mg/kg i.p.) was administered to adult male rats and the testes examined 6, 12, 18, 24, 48 and 72 h later. Numbers of Leydig cells, identified by 3 beta-hydroxysteroid dehydrogenase immuno-histochemistry started to fall by 12 h after EDS injection and were almost undetectable by 72 h. Apoptotic cells in the interstitium, visualised by in situ end labelling of DNA, increased in number to reach a maximum 24 h after injection of EDS, and were undetectable by 72 h. In many tissues the apoptosis-related gene products act in cohort: Bcl-2 and Bcl-xl promoting survival of a cell, whilst Bax promotes cell death often positively regulated by the tumour-suppressor gene p53. Western blot analysis showed that: (1) Bcl-2 and p53 were absent from interstitial Leydig cells but were expressed in the seminiferous tubules. (2) Bax protein although expressed in the interstitium was not present in the Leydig cells. (3) Bcl-xl in Leydig cells was transiently increased after EDS. In conclusion, EDS kills Leydig cells by apoptosis; however the control of Leydig cell death does not involve p53 or the Bcl-2 family members but may require other gene products yet to be identified.

Stress-related effects on the secretion of progesterone by the adrenals in castrated male rats presented to stimulus males. Involvement of oestrogen

1987 ◽  
Vol 114 (3) ◽  
pp. 440-445 ◽  
Author(s):  
C. Schaeffer ◽  
Cl. Aron
Keyword(s):  
Olive Oil ◽  
Significant Rise ◽  
Male Rats ◽  
Progesterone Concentration ◽  
Oestrogen Treatment ◽  
Stressful Condition ◽  
Progesterone Secretion ◽  
Oestradiol Benzoate ◽  
Behavioural Test

Abstract. Rats were orchidectomized (ORCH) as adults and given 1) successive doses of 0.5 μg or 1.0 μg of oestradiol benzoate (EB) combined or not with dexamethasone (DEXA) at the end of oestrogen treatment; 2) successive doses of olive oil. They were presented to stimulus males on the day of the last EB injection and decapitated immediately after the behavioural test. Animals given EB or olive oil only served as controls. There was a significant rise in blood progesterone concentration in animals given 0.5 and 1.0 μg EB as compared with oil-treated animals. A higher blood progesterone concentration was observed at the end of the behavioural session in oil-treated and 0.5 μ EB-treated ORCH rats than in their isolated counterparts, an effect which appeared not to dependent on lordosis responses to mounting attempts of the males. DEXA completely suppressed the rise in blood progesterone concentration in oestrogenized ORCH rats presented to stimulus males. Presentation of ORCH rats to stimulus males was then concluded to constitute a stressful condition capable of inducing adrenocortical progesterone secretion in ORCH animals.

scholarly journals Histopathological Effects of Carbamazepine on The Reproductive System of Male Rats

2021 ◽  
Vol 26 (2) ◽  
Author(s):  
HAYDER ALAA
Keyword(s):  
Leydig Cells ◽  
Small Diameter ◽  
Male Rats ◽  
Control Group ◽  
Distilled Water ◽  
Pathological Changes ◽  
Adult Rats ◽  
Histopathological Effects ◽  
Carbamazepine Concentration ◽  
Number Of Cells

 This research aims to identify the effect of carbamazepine on genital tissues of male rats.  In this experiment (20) male from adult rats were randomly assigned to 2 groups, Each group comprises (10) animals. Control group  gavage with distilled water, First group  gavage carbamazepine concentration (30) mg/kg of body weight. After 45 days, genitals eradicated for the purpose of textile on study them, Histological examination showed pathological changes in the occurrence of the testis in (T1) represented by its small diameter tubular deferens Also, the number of cells formed for sperm cells and spermatid and leydig cells has been reduced and cells for Spermatogonia get necrosis of the facility.

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