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Leydig cell

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https://www.readbyqxmd.com/read/28726031/the-natural-history-of-leydig-cell-testicular-tumours-an-analysis-of-the-national-cancer-registry
#1
G J Nason, E J Redmond, S W Considine, S I Omer, D Power, P Sweeney
BACKGROUND: Leydig cell tumour (LCT) of the testis is a rare histological subtype of stromal tumours, accounting for 1 to 3% of testicular neoplasms. The natural history of LCT is poorly understood. AIMS: The aim of this study was to assess the incidence and natural history of Leydig cell tumours (LCT) of the testes. METHODS: A search of the National Cancer Registry of Ireland database was performed regarding Leydig cell testicular tumours...
July 19, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28719047/effect-of-typha-capensis-rohrb-n-e-br-rhizome-extract-f1-fraction-on-cell-viability-apoptosis-induction-and-testosterone-production-in-tm3-leydig-cells
#2
A Ilfergane, R R Henkel
Typha capensis (Rohrb.)N.E.Br. (bulrush) is used by traditional healers in Southern Africa to treat male reproductive problems. This study aimed at investigating the effects of T. capensis on TM3-Leydig cells. T. capensis rhizome crude extract obtained from autumn, winter, spring and summer harvest was fractionated using HPLC into four fractions, and TM3-Leydig cells were incubated with different concentrations of the F1 fraction (0.01, 0.02, 0.1, 1, 10 and 100 μg/ml) for 24, 48 and 96 hr respectively...
July 18, 2017: Andrologia
https://www.readbyqxmd.com/read/28710293/probing-gata-factor-function-in-mouse-leydig-cells-via-testicular-injection-of-adenoviral-vectors
#3
Gervette M Penny, Rebecca B Cochran, Marjut Pihlajoki, Antti Kyrönlahti, Anja Schrade, Merja Häkkinen, Jorma Toppari, Markku Heikinheimo, David B Wilson
Testicular Leydig cells produce androgens essential for proper male reproductive development and fertility. Here, we describe a new Leydig cell ablation model based on Cre/Lox recombination of mouse Gata4 and Gata6, two genes implicated in the transcriptional regulation of steroidogenesis. The testicular interstitium of adult Gata4(flox/flox);Gata6(flox/flox) mice was injected with adenoviral vectors encoding Cre + GFP (Ad-Cre-IRES-GFP) or GFP alone (Ad-GFP). The vectors efficiently and selectively transduced Leydig cells, as evidenced by GFP reporter expression...
July 14, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28706413/virilization-in-a-postmenopausal-female-due-to-androgen-secreting-ovarian-dermoid-cyst
#4
Murali Subbaiah, Gowri Dorairajan, Debasis Gochhait, G Vijayalakshmi
Virilizing ovarian dermoid cysts are very rare. The source of androgen in these cysts may be tumors such as Sertoli-Leydig cell tumor or Leydig cell hyperplasia. A 52-year-old postmenopausal female with virilization was found to have an ovarian dermoid cyst on ultrasound. Her serum testosterone levels were elevated. Leydig cell hyperplasia within the dermoid cyst was found to be the source of androgen in this patient.
April 2017: Journal of Mid-life Health
https://www.readbyqxmd.com/read/28704075/arecoline-cannot-alter-testicular-dysfunction-and-pineal-activation-caused-by-noise-in-wistar-rat
#5
Indraneel Saha, Aniruddha Chatterjee, Urmi Chatterji, B R Maiti
Millions of people consume betel nut for increased capacity to work and for stress reduction. The nut contains arecoline, which has multiple side effects on endocrine functions. Objective of the work is to investigate pineal-testicular responses to noise and after arecoline treatment in noise in rats. Noise exposure (100 dB, 6 h daily, 10 days) caused pineal stimulation ultrastructurally and at indoleamines level. Leydig cell dysfunction with fall of testosterone level and suppression of sex accessories were noticed...
July 13, 2017: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28701961/insights-into-the-development-of-the-adult-leydig-cell-lineage-from-stem-leydig-cells
#6
REVIEW
Leping Ye, Xiaoheng Li, Linxi Li, Haolin Chen, Ren-Shan Ge
Adult Leydig cells (ALCs) are the steroidogenic cells in the testes that produce testosterone. ALCs develop postnatally from a pool of stem cells, referred to as stem Leydig cells (SLCs). SLCs are spindle-shaped cells that lack steroidogenic cell markers, including luteinizing hormone (LH) receptor and 3β-hydroxysteroid dehydrogenase. The commitment of SLCs into the progenitor Leydig cells (PLCs), the first stage in the lineage, requires growth factors, including Dessert Hedgehog (DHH) and platelet-derived growth factor-AA...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28700438/foxl2-mutation-analysis-of-ovarian-sex-cord-stromal-tumors-genotype-phenotype-correlation-with-diagnostic-considerations
#7
Natalia Buza, Serena Wong, Pei Hui
Correlation of FOXL2 mutation status with morphologic features and reticulin staining patterns was performed in a comprehensive single-institutional cohort of ovarian sex cord-stromal tumors. Fifty-one cases were included, 35 of which were morphologically diagnosed as adult granulosa cell tumor, 4 as Sertoli-Leydig cell tumor, 11 as fibroma/fibrothecoma and 1 as a thecoma. Of the adult granulosa cell tumors, 31 (88.6%) harbored FOXL2 mutation. Abundant pale cytoplasm was seen in 51.6% (16/31) of FOXL2 mutated tumors, compared with 6...
July 11, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28697680/t-2-toxin-induces-apoptosis-via-the-bax-dependent-caspase-3-activation-in-mouse-primary-leydig-cells
#8
Yong Fa Zhang, Pan Ke Su, Lun Ji Wang, Hui Qi Zheng, Xue Fei Bai, Ping Li, Xiang Ping Meng, Jian Ying Yang
To explore the toxic effect of T-2 toxin on mouse Leydig cells and its underlying molecular mechanisms, we isolated Leydig cells from mature mice, set-up Leydig cells culture, treated cells with T-2 toxin, evaluated cell proliferation, detected the caspase-3 activity, mitochondrial activity and apoptosis rate, and measured the mRNA levels of Bcl-2, Bax, PARP and caspase-3. T-2 toxin inhibited cell proliferation at concentrations higher than 10(-9) M or time more than 12 h, T-2 toxin also decreased Bcl-2 expression at the mRNA levels and mitochondrial activity at concentrations higher than 10(-9) M...
July 11, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28697429/bisphenol-a-disrupts-steroidogenesis-and-induces-a-sex-hormone-imbalance-through-c-jun-phosphorylation-in-leydig-cells
#9
Hsin-Chieh Lan, Kai-Yu Wu, I-Wen Lin, Zhi-Jie Yang, Ai-An Chang, Meng-Chun Hu
Bisphenol A (BPA) is a well-known endocrine disrupting chemical (EDC) that is used to manufacture plastic consumer products. It is well known that exposure to BPA can induce defects in gonad development and negatively influences reproductive function in both males and females. In this study, we assessed the effects of BPA on hormone production in Leydig cells, which secrete hormones in the testes and support male fertility. We examined two steroidogenic enzymes, CYP11A1 and CYP19 that involved in sex hormone synthesis in mouse MA-10 Leydig cells...
July 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28694759/using-curcumin-to-prevent-structural-impairments-of-testicles-in-rats-induced-by-sodium-metabisulfite
#10
Reza Mahmoudi, Zahra Honarmand, Saied Karbalay-Doust, Mehrzad Jafari-Barmak, Mohsen Nikseresht, Ali Noorafshan
Sodium metabisulfite (Na-MBS) is a disinfectant and preservative agent. Some organ including testicle would be in danger in the case of Na-MBS consumption. Curcumin (CUR) is the constituent of turmeric with protective properties. The effect of CUR on testicles in rats exposed to Na-MBS evaluated using stereological methods. Sprague-Dawley rats were divided into eight groups. The rats in groups I to VIII received the following respectively: distilled water, CUR (100 mg/kg/day), low (0.7 mg/kg/day: acceptable daily intake), intermediate (7 mg/ kg/day), and high (70 mg/kg/day) doses of Na-MBS, and low, intermediate, and high doses of Na-MBS plus CUR...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28694581/leydig-cell-tumor-of-testis-in-a-child-an-uncommon-presentation
#11
Madhumita Mukhopadhyay, Chhanda Das, Sucharita Sarkar, Biswanath Mukhopadhyay, Bedabrata Mukhopadhyay, Rishavdeb Patra
Leydig cell tumors (LCTs) are rare testicular tumors. Incidence is 1%-3% of all testicular neoplasms, bilateral in 10%. They are frequently hormonally active, leading to feminizing or virilizing syndromes. LCTs can be either pure or mixed with germ cell tumors or other sex cord-stromal tumors. Here, we are reporting a benign pure LCT in a 6-year-old boy presented with pseudopuberty.
July 2017: Journal of Indian Association of Pediatric Surgeons
https://www.readbyqxmd.com/read/28693627/morphofunctional-evaluation-of-the-testis-duration-of-spermatogenesis-and-spermatogenic-efficiency-in-the-japanese-fancy-mouse-mus-musculus-molossinus
#12
Guilherme M J Costa, Marcelo C Leal, Luiz R França
Japanese fancy mouse, mini mouse or pet mouse are common names used to refer to strains of mice that present with different colour varieties and coat types. Although many genetic studies that involve spotting phenotype based on the coat have been performed in these mice, there are no reports of quantitative data in the literature regarding testis structure and spermatogenic efficiency. Hence, in this study we researched testis function and spermatogenesis in the adult Japanese fancy mouse. The following values of 68 ± 6 mg and 0...
July 11, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28676275/testicular-adrenal-rest-tumor-tart-in-congenital-adrenal-hyperplasia
#13
Hatice Ozisik, Banu Sarer Yurekli, Ilgin Yildirim Simsir, Ilker Altun, Utku Soyaltın, Ezgi Guler, Huseyin Onay, Banu Sarsik, Fusun Saygili
Congenital adrenal hyperplasia is one of the most common autosomal recessive genetic disorders. Testicular adrenal tumors are significant complications of congenital adrenal hyperplasia. We would like to present two patients of testicular adrenal rest tumors. Patient 1 24 year-old male, he was diagnosed with congenital adrenal hyperplasia at the age of 8 due to precocious puberty. He received hydro-cortisone treatment until the age of 18. Testicular mass had been detected and right radical orchiectomy had been applied 6 months ago and reported as testicular adrenal rest tumor...
July 1, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28673265/a-randomized-double-blind-study-of-testosterone-replacement-therapy-or-placebo-in-testicular-cancer-survivors-with-mild-leydig-cell-insufficiency-einstein-intervention
#14
Mikkel Bandak, Niels Jørgensen, Anders Juul, Jakob Lauritsen, Michael Kreiberg, Peter Sandor Oturai, Jørn Wulff Helge, Gedske Daugaard
BACKGROUND: Elevated serum levels of luteinizing hormone and slightly decreased serum levels of testosterone (mild Leydig cell insufficiency) is a common hormonal disturbance in testicular cancer (TC) survivors. A number of studies have shown that low serum levels of testosterone is associated with low grade inflammation and increased risk of metabolic syndrome. However, so far, no studies have evaluated whether testosterone substitution improves metabolic dysfunction in TC survivors with mild Leydig cell insufficiency...
July 3, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28670522/co-administration-of-vitamin-e-and-testosterone-attenuates-the-atrazine-induced-toxic-effects-on-sperm-quality-and-testes-in-rats
#15
Hamed Rezaie Agdam, Mazdak Razi, Amir Amniattalab, Hassan Malekinejad, Morteza Molavi
OBJECTIVE: Atrazine (ATZ) as a widely used herbicide is considered as a potent endocrine disrupter which adversely affects reproductive systems in both genders. This study aimed to assess the effects of testosterone (T)- and vitamin E (VitE)- alone and their coadministration on testicular function and sperm parameters after exposure to ATZ in rats. MATERIALS AND METHODS: In this experimental study, the rats (n=30) are assigned into the following 5 groups: control-sham group (n=6) receiving corn oil, ATZ group (n=6) receiving 200 mg/kg ATZ alone, ATZ+VitE group (n=6) receiving 150 mg/kg ATZ+VitE, ATZ+T group (n=6) receiving 400 µg/kg ATZ+T, and ATZ+VitE+T group (n=6) receiving ATZ+VitE+T for 48 consecutive days...
July 2017: Cell Journal
https://www.readbyqxmd.com/read/28669037/in-vitro-study-of-zika-virus-infection-in-boar-semen
#16
Natthanej Luplertlop, San Suwanmanee, Sumate Ampawong, Sompong Vongpunsawad, Yong Poovorawan
Zika virus (ZIKV) is an important arbovirus that is capable of directly infecting neuronal cells. Infection can cause microcephaly in fetuses and Guillain-Barré syndrome in adults. Recent epidemiological studies have shown that ZIKV is sexually transmitted, especially from infected males to uninfected females. This study aimed to investigate the transmission pattern of ZIKV in semen using boar semen. Experiments were performed ex vivo using semen from healthy boar. The samples were infected with ZIKV, and viral RNA was detected and cell morphology was examined at different time points postinfection...
July 1, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28668616/influence-of-flavonols-and-quercetin-derivative-compounds-on-ma-10-leydig-cells-steroidogenic-genes-expressions
#17
Michelle Cormier, Firas Ghouili, Pauline Roumaud, Luc J Martin, Mohamed Touaibia
Androgen are mainly synthesized and secreted from testicular Leydig cells and play critical roles in testis development, normal masculinization, spermatogenesis, and male fertility. The rate-limiting step in testosterone biosynthesis involves the import of cholesterol inside mitochondria by the steroidogenic acute regulatory (Star) protein. Cholesterol is then converted to pregnenolone by the steroidogenic enzyme Cyp11a1, followed by a chemical transformation to testosterone using other steroidogenic enzymes...
June 28, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28666491/new-onset-type-2-diabetes-and-virilization-in-a-benign-sex-cord-tumor
#18
Firouzeh Feiz, Afsaneh Tehranian, Somaye Sadat Heidary, Akram Seifollahi
The stromal leydig cell tumor (SLCT) is a very rare benign tumor of ovary which occurs more often in young women in reproductive age. In this report, we describe a SLCTin a postmenopausal woman with high level of testosterone and triggering of type 2 diabetes, occurring 3 months after removal of the tumor.
November 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28658892/poorly-differentiated-sertoli-leydig-cell-tumour-of-ovary-with-heterologous-elements
#19
Tapan Kumar Sahoo, Tushar Kar, Asaranti Kar, Sasmita Panda
Sertoli-Leydig Cell Tumour (SLCT) is included under sex-cord stromal tumour of testis or ovary. Ovarian pathology is an extremely rare entity constituting less than 0.5% of all ovarian neoplasms. Majority of the cases present at younger age group, i.e., 2(nd) and 3(rd) decade of life. The clinical presentation depends on either mass effect or excess hormone production. Virillization symptoms are the most common presentation and depend upon the quantity of androgen production. Most of the patients have a unilateral mass without extraovarian spread and present at stage-I...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28658785/cystic-sertoli-leydig-cell-tumour-in-a-postmenopausal-woman-with-absent-virilising-symptoms-a-diagnostic-challenge
#20
Vidya Monappa, Saritha M Reddy, Ranjini Kudva, Muralidhar V Pai
A 60-year-old postmenopausal woman, presented with a left ovarian cystic mass with mildly elevated CA125 levels. An intraoperative frozen section showed oedematous ovarian stroma with interspersed large aggregates of spindle shaped stromal cells. Subsequently, the excised specimen was reported as Sertoli-Leydig Cell Tumour (SLCT) of intermediate differentiation. The leydig cells were identified in the imprint smears, but were misinterpreted as luteinized cells. The lack of tubular differentiated cells in frozen section had contributed to the misdiagnosis...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
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