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https://www.readbyqxmd.com/read/29031189/renal-subcapsular-xenografing-of-human-fetal-external-genital-tissue-a-new-model-for-investigating-urethral-development
#1
Dylan Isaacson, Joel Shen, Mei Cao, Adriane Sinclair, Xuan Yue, Gerald Cunha, Laurence Baskin
In this paper, we introduce our novel renal subcapsular xenograft model for the study of human penile urethral and clitoral development. We grafted fifteen intact fetal penes and clitorides 8-11 weeks fetal age under the renal capsules of gonadectomized athymic mice. The mice were treated with a subcutaneous pellet of dihydrotestosterone (DHT), diethylstilbestrol (DES) or untreated with hormones. Xenografts were harvested after fourteen days of growth and analyzed via serial histologic sectioning and immunostaining for Ki-67, cytokeratins 6, 7 and 10, uroplakin and the androgen receptor...
September 22, 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29030154/simultaneous-profiles-of-sulfonated-androgens-sulfonated-estrogens-and-sulfonated-progestogens-in-postpubertal-boars-sus-scrofa-domestica-measured-by-lc-ms-ms
#2
G Schuler, A Sánchez-Guijo, M F Hartmann, S A Wudy
Sulfonated steroids (s-St) have been usually regarded as inactive metabolites but are progressively considered as precursors for the intra-tissue formation of bioactive steroids. Moreover, independent effects without preceding removal of the sulfate group have been observed. We use the porcine testicular-epididymal compartment as a model to investigate the still largely unknown s-St physiology as the boar exhibits an intriguingly broad s-St spectrum predominantly originating from the testis. The application of LC-MS/MS in steroidomics enables the determination of unconjugated and intact sulfonated steroids with currently highest specificity and good sensitivity, allowing the concurrent measuring of numerous analytes in larger quantities of samples...
October 10, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28993616/bone-corticalization-requires-local-socs3-activity-and-is-promoted-by-androgen-action-via-interleukin-6
#3
Dae-Chul Cho, Holly J Brennan, Rachelle W Johnson, Ingrid J Poulton, Jonathan H Gooi, Brett A Tonkin, Narelle E McGregor, Emma C Walker, David J Handelsman, T J Martin, Natalie A Sims
Long bone strength is determined by its outer shell (cortical bone), which forms by coalescence of thin trabeculae at the metaphysis (corticalization), but the factors that control this process are unknown. Here we show that SOCS3-dependent cytokine expression regulates bone corticalization. Young male and female Dmp1Cre.Socs3 (f/f) mice, in which SOCS3 has been ablated in osteocytes, have high trabecular bone volume and poorly defined metaphyseal cortices. After puberty, male mice recover, but female corticalization is still impaired, leading to a lasting defect in bone strength...
October 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28992603/sex-steroid-hormones-and-sex-hormone-binding-globulin-levels-cyp17-msp-ai-34t-c-and-cyp19-codon-39-trp-arg-variants-in-children-with-developmental-stuttering
#4
Hiwa Mohammadi, Mohammad Taghi Joghataei, Zohreh Rahimi, Faezeh Faghihi, Habibolah Khazaie, Hashem Farhangdoost, Masoud Mehrpour
Developmental stuttering is known to be a sexually dimorphic and male-biased speech motor control disorder. In the present case-control study, we investigated the relationship between developmental stuttering and steroid hormones. Serum levels of testosterone, dihydrotestosterone (DHT), dehydroepiandrosterone (DHEA), oestradiol, progesterone, cortisol, and sex hormone binding globulin (SHBG), as well as the 2nd/4th digit ratio (2D:4D), an indicator of prenatal testosterone level, were compared between children who stutter (CWS) and children who do not stutter (CWNS)...
October 6, 2017: Brain and Language
https://www.readbyqxmd.com/read/28989573/corn-silk-extract-improves-benign-prostatic-hyperplasia-in-experimental-rat-model
#5
So Ra Kim, Ae Wha Ha, Hyun Ji Choi, Sun Lim Kim, Hyeon Jung Kang, Myung Hwan Kim, Woo Kyoung Kim
BACKGROUND/OBJECTIVES: This study was conducted to investigate the effect of a corn silk extract on improving benign prostatic hyperplasia (BPH). MATERIALS/METHODS: The experimental animals, 6-week-old male Wistar rats, were divided into sham-operated control (Sham) and experimental groups. The experimental group, which underwent orchiectomy and received subcutaneous injection of 10 mg/kg of testosterone propionate to induce BPH, was divided into a Testo Only group that received only testosterone, a Testo+Fina group that received testosterone and 5 mg/kg finasteride, a Testo+CSE10 group that received testosterone and 10 mg/kg of corn silk extract, and a Testo+CSE100 group that received testosterone and 100 mg/kg of corn silk extract...
October 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28982631/effect-of-the-5%C3%AE-reductase-enzyme-inhibitor-dutasteride-in-the-brain-of-intact-and-parkinsonian-mice
#6
Nadhir Litim, Marc Morissette, Donatella Caruso, Roberto C Melcangi, Thérèse Di Paolo
Dutasteride is a 5alpha-reductase inhibitor in clinical use to treat endocrine conditions. The present study investigated the neuroprotective mechanisms of action of dutasteride in intact and 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned mice using a low dose of MPTP not affecting motor activity modeling early stages of Parkinson's disease (PD). We hypothesized that dutasteride neuroprotection is due to altered steroids levels. Dutasteride pre-treatment prevented loss of striatal dopamine (DA) and its metabolite DOPAC...
October 2, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28977936/the-regulation-of-hydroxysteroid-17%C3%AE-dehydrogenase-type-1-and-2-gene-expression-in-breast-cancer-cell-lines-by-estradiol-dihydrotestosterone-micrornas-and-genes-related-to-breast-cancer
#7
Erik Hilborn, Olle Stål, Andrey Alexeyenko, Agneta Jansson
AIM: To investigate the influence of estrogen, androgen, microRNAs, and genes implicated in breast cancer on the expression of HSD17B1 and HSD17B2. MATERIALS: Breast cancer cell lines ZR-75-1, MCF7, T47D, SK-BR-3, and the immortalized epithelial cell line MCF10A were used. Cells were treated either with estradiol or dihydrotestosterone for 6, 24, 48 hours, or 7 days or treated with miRNAs or siRNAs predicted to influence HSD17B expression Results and discussion...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28977609/gonadal-hormone-dependent-sexual-differentiation-of-a-female-biased-sexually-dimorphic-cell-group-in-the-principal-nucleus-of-the-bed-nucleus-of-the-stria-terminalis-in-mice
#8
Masahiro Morishita, Sho Maejima, Shinji Tsukahara
We recently reported a female-biased sexually dimorphic area in the mouse brain in the boundary region between the preoptic area and the bed nucleus of the stria terminalis (BNST). We reexamined this area and found that it is a ventral part of the principal nucleus of the BNST (BNSTp). The BNSTp is a male-biased sexually dimorphic nucleus, but the ventral part of the BNSTp (BNSTpv) exhibits female-biased sex differences in volume and neuron number. The volume and neuron number of the BNSTpv were increased in males by neonatal orchiectomy and decreased in females by treatment with testosterone, dihydrotestosterone, or estradiol within 5 days after birth...
October 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28971497/circulating-and-intraprostatic-sex-steroid-hormonal-profiles-in-relation-to-male-pattern-baldness-and-chest-hair-density-among-men-diagnosed-with-localized-prostate-cancers
#9
Cindy Ke Zhou, Frank Z Stanczyk, Muhannad Hafi, Carmela C Veneroso, Barlow Lynch, Roni T Falk, Shelley Niwa, Eric Emanuel, Yu-Tang Gao, George P Hemstreet, Ladan Zolfghari, Peter R Carroll, Michael J Manyak, Isabell A Sesterhenn, Paul H Levine, Ann W Hsing, Michael B Cook
BACKGROUND: Prospective cohort studies of circulating sex steroid hormones and prostate cancer risk have not provided a consistent association, despite evidence from animal and clinical studies. However, studies using male pattern baldness as a proxy of early-life or cumulative androgen exposure have reported significant associations with aggressive and fatal prostate cancer risk. Given that androgens underlie the development of patterned hair loss and chest hair, we assessed whether these two dermatological characteristics were associated with circulating and intraprostatic concentrations of sex steroid hormones among men diagnosed with localized prostate cancer...
October 2, 2017: Prostate
https://www.readbyqxmd.com/read/28971491/plumbagin-improves-the-efficacy-of-androgen-deprivation-therapy-in-prostate-cancer-a-pre-clinical-study
#10
Parisa Abedinpour, Véronique T Baron, Adrian Chrastina, Gaelle Rondeau, Jennifer Pelayo, John Welsh, Per Borgström
BACKGROUND: Plumbagin is a candidate drug for the treatment of prostate cancer. Previous observations indicated that it may improve the efficacy of androgen deprivation therapy (ADT). This study evaluates the effectiveness of treatment with combinations of plumbagin and alternative strategies for ADT in mouse models of prostate cancer to support its clinical use. METHODS: Plumbagin was administered per oral in a new sesame oil formulation. Standard toxicology studies were performed in rats...
October 2, 2017: Prostate
https://www.readbyqxmd.com/read/28961951/the-polycystic-ovary-syndrome-associated-gene-yap1-is-regulated-by-gonadotropins-and-sex-steroid-hormones-in-hyperandrogenism-induced-oligo-ovulation-in-mouse
#11
Shu-Yan Ji, Xiao-Man Liu, Bo-Tai Li, Yin-Li Zhang, Hong-Bin Liu, Yu-Chao Zhang, Zi-Jiang Chen, Junping Liu, Heng-Yu Fan
STUDY QUESTION: What is the physiological function of Yes-associated protein-1 (Yap1), a susceptibility gene for polycystic ovarian syndrome (PCOS), in ovarian granulosa cells? SUMMARY ANSWER: Physiologically, steroid sex hormones stimulate follicle growth by activating YAP1; however, the preovulatory inhibition of YAP1 activity in granulosa cells is a prerequisite of LH actions. WHAT IS KNOWN ALREADY: PCOS is a common gynecologic and endocrine disease with multiple short and long-term consequences...
August 10, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28961846/risk-of-age-related-macular-degeneration-in-patients-with-prostate-cancer-a-nationwide-population-based-cohort-study
#12
S-Y Lin, C-L Lin, C-H Chang, H-C Wu, C-H Lin, C-H Kao
Background: Prostate cancer (PC) can be related to increased systemic oxidative stress and dihydrotestosterone level, which are also reported to be involved in the pathogenesis of age-related macular degeneration (AMD). We conducted a cohort study to determine whether patients with PC have an increased risk of AMD. Patients and methods: Data were collected from the Taiwan Longitudinal Health Insurance Database for the 1999-2010 period. The study PC cohort comprised 22 084 patients aged ≥18 years with a first diagnosis of PC...
October 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28960541/inhibitory-effect-of-thymoquinone-on-testosterone-induced-benign-prostatic-hyperplasia-in-wistar-rats
#13
Bahaa Al-Trad, Mazhar Al-Zoubi, Janti Qar, Khalid Al-Batayneh, Emad Hussien, Riyadh Muhaidat, Alaa Aljabali, Hakam Alkhateeb, Ghada Al Omari
This study addresses the possible protective effects of thymoquinone (TQ) against the development of experimentally-induced benign prostatic hyperplasia (BPH) in Wistar rats. Eighteen adult male rats were divided into three groups; the negative control group (n = 6) received vehicle, and two groups received subcutaneous testosterone injection (3 mg/kg). Animals receiving testosterone were randomized to untreated BPH group (n = 6) and BPH + TQ treated group (n = 6, 50 mg/kg orally for 14 days). Histological changes and the mRNA levels of transforming growth factor-β1 (TGF-β1 ) and vascular endothelial growth factor-A (VEGF-A) were analyzed...
September 28, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28957431/male-hormones-activate-epha2-to-facilitate-kaposi-s-sarcoma-associated-herpesvirus-infection-implications-for-gender-disparity-in-kaposi-s-sarcoma
#14
Xing Wang, Zhe Zou, Zhaohui Deng, Deguang Liang, Xin Zhou, Rui Sun, Ke Lan
There is increasing consensus that males are more vulnerable than females to infection by several pathogens. However, the underlying mechanism needs further investigation. Here, it was showed that knockdown of androgen receptor (AR) expression or pre-treatment with 5α-dihydrotestosterone, the AR agonist, led to a considerably dysregulated Kaposi's sarcoma-associated herpesvirus (KSHV) infection. In endothelial cells, membrane-localized AR promoted the endocytosis and nuclear trafficking of KSHV. The AR interacted with ephrin receptor A2 (EphA2) and increased its phosphorylation at residue Ser897, which was specifically upregulated upon KSHV infection...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28953224/cynanchum-wilfordii-ameliorates-testosterone-induced-benign-prostatic-hyperplasia-by-regulating-5%C3%AE-reductase-and-androgen-receptor-activities-in-a-rat-model
#15
Gyuok Lee, Jawon Shin, Hakjoon Choi, Ara Jo, SangO Pan, Donghyuck Bae, Yongwook Lee, Chulyung Choi
Benign prostatic hyperplasia (BPH) is characterized by uncontrolled proliferation of the prostate gland. Cynanchum wilfordii has been reported to improve sexual behavior in male rats. In this study, we investigated the protective effect of an aqueous extract of C. wilfordii (CWW) against BPH development in a testosterone-induced BPH rat model. The rats were divided into the following six groups: sham/vehicle; BPH/vehicle; BPH/finasteride; and three CWW doses (50, 100, and 200 mg/kg). After a 4-week treatment with CWW, the rats were euthanized at scheduled times, and their prostates were weighed, followed by a histopathological examination...
September 27, 2017: Nutrients
https://www.readbyqxmd.com/read/28951227/transport-of-steroid-3-sulfates-and-steroid-17-sulfates-by-the-sodium-dependent-organic-anion-transporter-soat-slc10a6
#16
Gary Grosser, Josefine Bennien, Alberto Sánchez-Guijo, Katharina Bakhaus, Barbara Döring, Michaela Hartmann, Stefan A Wudy, Joachim Geyer
The sodium-dependent organic anion transporter SOAT/Soat shows highly specific transport activity for sulfated steroids. SOAT substrates identified so far include dehydroepiandrosterone sulfate, 16α-hydroxydehydroepiandrosterone sulfate, estrone-3-sulfate, pregnenolone sulfate, 17β-estradiol-3-sulfate, and androstenediol sulfate. Apart from these compounds, many other sulfated steroids occur in mammals. Therefore, we aimed to expand the substrate spectrum of SOAT and analyzed the SOAT-mediated transport of eight different sulfated steroids by combining in vitro transport experiments in SOAT-transfected HEK293 cells with LC-MS/MS analytics of cell lysates...
September 23, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28947342/apigenin-inhibits-rat-neurosteroidogenic-5%C3%AE-reductase-1-and-3%C3%AE-hydroxysteroid-dehydrogenase
#17
Ying Wu, Lili Li, Songyi Zhou, Qiuxia Shen, Han Lin, Qiqi Zhu, Jianliang Sun, Ren-Shan Ge
Apigenin, a common flavonoid, has extensive pharmacological activities. Apigenin inhibits some steroid biosynthetic enzymes, suggesting that it may block neurosteroid synthesis. Neurosteroids play many important roles in neurological functions. The objective of the present study is to investigate effects of apigenin on neurosteroidogenic enzymes, 5α-reductase 1 (SRD5A1), 3α-hydroxysteroid dehydrogenase (AKR1C9), and retinol dehydrogenase 2 (RoDH2), in rats. SRD5A1, AKR1C9, and RoDH2 were expressed in COS-1 cells and the effects of apigenin on these enzymes and modes of action were explored using radiolabeled substrates and thin-layer chromatographic separation coupled with radiometry...
September 22, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28947209/expression-of-ar-5%C3%AE-r1-and-5%C3%AE-r2-in-bladder-urothelial-carcinoma-and-relationship-to-clinicopathological-factors
#18
Shuko Hata, Kazue Ise, Abdullah Azmahani, Sachiko Konosu-Fukaya, Keely May McNamara, Fumiyoshi Fujishima, Keiji Shimada, Koji Mitsuzuka, Yoichi Arai, Hironobu Sasano, Yasuhiro Nakamura
AIMS: Bladder urothelial carcinoma is increasing in incidence with age and its prognosis could become worse when accompanied with metastasis. Effective treatment of these advanced patients is required and it becomes important to understand its underlying biology of this neoplasm, especially with regard to its biological pathways. A potential proposed pathway is androgen receptor (AR)-mediated intracellular signaling but the details have remained relatively unexplored. MAIN METHODS: The expression of AR, 5α-reductase type1 (5αR1) and 5α-reductase type2 (5αR2) were examined in the bladder cancer cell line T24 and surgical pathology specimens...
September 22, 2017: Life Sciences
https://www.readbyqxmd.com/read/28945276/progressive-impairment-of-testicular-endocrine-function-in-ageing-men-testosterone-and-dihydrotestosterone-decrease-and-luteinizing-hormone-increases-in-men-transitioning-from-the-8th-to-9th-decades-of-life
#19
Bu B Yeap, Laurens Manning, S A Paul Chubb, David J Handelsman, Osvaldo P Almeida, Graeme J Hankey, Leon Flicker
CONTEXT: Sex hormone trajectories in ageing men and their health implications remain unclear. We examined longitudinal trajectories and associations of testosterone (T), dihydrotestosterone (DHT), oestradiol (E2), luteinizing hormone (LH) and sex hormone-binding globulin (SHBG) in oldest old men. DESIGN: Prospective cohort study. PARTICIPANTS: We studied 1025 community-dwelling men median age 75.1 years at baseline with 8.6 years of follow-up...
September 25, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28939401/inefficient-ugt-conjugation-of-adrenal-11%C3%AE-hydroxyandrostenedione-metabolites-highlights-c11-oxy-c19-steroids-as-the-predominant-androgens-in-prostate-cancer
#20
Therina du Toit, Amanda C Swart
Although the adrenal C19 steroids, androstenedione and testosterone, contribute to prostate cancer (PCa) progression the full complement of adrenal androgens, including the C11-oxy C19 steroids, 11β-hydroxyandrostenedione (11OHA4) and 11β-hydroxytestosterone (11OHT) and their androgenic metabolites, 11keto-testosterone (11KT) and 11keto-dihydrotestosterone (11KDHT) have, to date, not been considered. This study investigated the contribution of 11OHA4 and 11OHT to the pool of active androgens in the prostate...
September 20, 2017: Molecular and Cellular Endocrinology
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