keyword
MENU ▼
Read by QxMD icon Read
search

DHT

keyword
https://www.readbyqxmd.com/read/28223151/testosterone-rapidly-increases-ca-2-activated-k-currents-causing-hyperpolarization-in-human-coronary-artery-endothelial-cells
#1
Katesirin Ruamyod, Wattana B Watanapa, Chairat Shayakul
Testosterone has endothelium-dependent vasodilatory effects on the coronary artery, with some reports suggesting endothelial ion channel involvement. This study employed the whole-cell patch clamp technique to investigate the effect of testosterone on ion channels in human coronary artery endothelial cells (HCAECs) and the mechanisms involved. We found that 0.03-3μM testosterone significantly induced a rapid, concentration-dependent increase in total HCAEC current (EC50, 71.96±1.66nM; maximum increase, 59...
February 18, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28216900/trichosanthes-kirilowii-exerts-androgenic-activity-via-regulation-of-psa-and-klk2-in-22rv1-prostate-cancer-cells
#2
Soo-Jin Jeong, Ji-Yoon Choi, Mi-Sook Dong, Chang-Seob Seo, Hyeun-Kyoo Shin
BACKGROUND: The androgen comprises a group of hormones that play roles in male reproductive activity as well as personal characteristics. OBJECTIVE: We investigated the androgenic activity of various herbal medicines in human prostate cancer 22Rv1 cells. MATERIALS AND METHODS: Herbal extracts of Trichosanthes kirilowii (TK), Asarum sieboldii (AS), Sanguisorba officinalis (SO), and Xanthium strumarium (XS) were selected to have androgenic effects based on a preliminary in vitro screening system...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216616/cd8-t-cells-promote-proliferation-of-benign-prostatic-hyperplasia-epithelial-cells-under-low-androgen-level-via-modulation-of-ccl5-stat5-ccnd1-signaling-pathway
#3
Yang Yang, Shuai Hu, Jie Liu, Yun Cui, Yu Fan, Tianjing Lv, Libo Liu, Jun Li, Qun He, Wenke Han, Wei Yu, Yin Sun, Jie Jin
Previous studies by our group have shown that low intra-prostatic dihydrotestosterone (DHT) induced BPH epithelial cells (BECs) to recruit CD8+ T cells. However, the influence of the recruited CD8+ T cells on BECs under a low androgen level is still unknown. Here, we found CD8+ T cells have the capacity to promote proliferation of BECs in low androgen condition. Mechanism dissection revealed that interaction between CD8+ T cells and BECs through secretion of CCL5 might promote the phosphorylation of STAT5 and a higher expression of CCND1 in BECs...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28213978/estrogens-and-androgens-inhibit-association-of-rankl-with-the-pre-osteoblast-membrane-through-post-translational-mechanisms
#4
Anthony Martin, Jiali Yu, Jian Xiong, Aysha B Khalid, Benita Katzenellenbogen, Sung Hoon Kim, John A Katzenellenbogen, Suchinda Malaivijitnond, Yankel Gabet, Susan A Krum, Baruch Frenkel
We have recently demonstrated that RUNX2 promoted, and 17-β-Estradiol (E2) diminished, association of RANKL with the cell membrane in pre-osteoblast cultures. Here we show that, similar to E2, dihydrotestosterone (DHT) diminishes association of RANKL and transiently transfected GFP-RANKL with the pre-osteoblast membrane without decreasing total RANKL mRNA or protein levels. Diminution of membrane-associated RANKL was accompanied with marked suppression of osteoclast differentiation from co-cultured pre-osteoclasts, even though DHT increased, not decreased, RANKL concentrations in pre-osteoblast conditioned media...
February 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28194662/mmtv-pymt-and-derived-met-1-mouse-mammary-tumor-cells-as-models-for-studying-the-role-of-the-androgen-receptor-in-triple-negative-breast-cancer-progression
#5
Jessica L Christenson, Kiel T Butterfield, Nicole S Spoelstra, John D Norris, Jatinder S Josan, Julie A Pollock, Donald P McDonnell, Benita S Katzenellenbogen, John A Katzenellenbogen, Jennifer K Richer
Triple-negative breast cancer (TNBC) has a faster rate of metastasis compared to other breast cancer subtypes, and no effective targeted therapies are currently FDA-approved. Recent data indicate that the androgen receptor (AR) promotes tumor survival and may serve as a potential therapeutic target in TNBC. Studies of AR in disease progression and the systemic effects of anti-androgens have been hindered by the lack of an AR-positive (AR+) immunocompetent preclinical model. In this study, we identified the transgenic MMTV-PyMT (mouse mammary tumor virus-polyoma middle tumor-antigen) mouse mammary gland carcinoma model of breast cancer and Met-1 cells derived from this model as tools to study the role of AR in breast cancer progression...
February 13, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28182747/investigation-of-the-in-vitro-and-in-vivo-efficiency-of-rm-532-105-a-17%C3%AE-hydroxysteroid-dehydrogenase-type-3-inhibitor-in-lapc-4-prostate-cancer-cell-and-tumor-models
#6
Lucie Carolle Kenmogne, Jenny Roy, René Maltais, Mélanie Rouleau, Bertrand Neveu, Frédéric Pouliot, Donald Poirier
In the fight against androgen-sensitive prostate cancer, the enzyme 17β-hydroxysteroid dehydrogenase type 3 (17β-HSD3) is an attractive therapeutic target considering its key role in the formation of androgenic steroids. In this study, we attempted to assess the in vivo efficacy of the compound RM-532-105, an androsterone derivative developed as an inhibitor of 17β-HSD3, in the prostate cancer model of androgen-sensitive LAPC-4 cells xenografted in nude mice. RM-532-105 did not inhibit the tumor growth induced by 4-androstene-3,17-dione (4-dione); rather, the levels of the androgens testosterone (T) and dihydrotestosterone (DHT) increased within the tumors...
2017: PloS One
https://www.readbyqxmd.com/read/28176462/hormonal-treatment-ffects-on-the-cross-sectional-area-of-pubococcygeus-muscle-fibers-after-denervation-and-castration-in-male-rats
#7
Miguel Lara-García, Mayvi Alvarado, Estela Cuevas, Omar Lara-Garcia, Dale R Sengelaub, Pablo Pacheco
We explore the interaction of muscle innervation and gonadal hormone action in the pubococcygeus muscle (Pcm) after castration and hormone replacement. Male Wistar rats were castrated and the Pcm was unilaterally denervated; after 2 or 6 weeks, the cross-sectional area (CSA) of Pcm fibers was assessed. Additional groups of castrated rats were used to examine the effects of hormone replacement. At 2 weeks post surgeries, rats were implanted with Silastic capsules containing either dihydrotestosterone (DHT), estradiol benzoate (EB) or both hormones, and the CSA of Pcm fibers was assessed after 4 weeks of hormone treatment...
February 8, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28157253/total-testosterone-to-dihydrotestosterone-ratio-assessed-by-lc-ms-ms-predicts-a-worse-metabolic-profile-not-only-in-pcos-patients
#8
Urszula Ambroziak, Alina Kuryłowicz, Anna Kępczyńska-Nyk, Zbigniew Bartoszewicz, Agnieszka Kondracka, Radosław Jaźwiec, Emilia Samborowska, Michał Dadlez, Aleksandra Wysłouch-Cieszyńska, Tomasz Bednarczuk
OBJECTIVES: Total testosterone/dihydrotestosterone ratio (TT/DHT) was found to determine metabolic risk in polycystic ovary syndrome (PCOS). The aim of this study was to analyze whether (TT/DHT) may be helpful in predicting metabolic risk not only in PCOS patients but also in healthy women. MATERIAL AND METHODS: Total testosterone (TT), dihydrotestosterone (DHT), androstendione and dehydroepiandrosterone sulphate (DHEA-S) were measured by LC-MS/MS in 36 women with PCOS and in 29 age-matched controls without clinical hyperandrogenism...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28145028/effects-of-steroidal-antiandrogen-or-5-alpha-reductase-inhibitor-on-prostate-tissue-hormone-content
#9
Yasuhiro Shibata, Seiji Arai, Yoshiyuki Miyazawa, Takahiro Shuto, Masashi Nomura, Yoshitaka Sekine, Hidekazu Koike, Hiroshi Matsui, Kazuto Ito, Kazuhiro Suzuki
BACKGROUND: The effects of a steroidal antiandrogen (AA) and 5-alpha-reductase inhibitor (5ARI) on prostate tissue hormone content and metabolism are not fully elucidated. The objective of this study is to investigate the hormone content and metabolism of the prostate tissues of patients treated with AA or 5ARI using the ultra-sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method. METHODS: Thirty-nine patients with benign prostatic hyperplasia (BPH) undergoing transurethral surgery were included...
February 1, 2017: Prostate
https://www.readbyqxmd.com/read/28130740/effect-of-male-house-mouse-pheromone-components-on-behavioral-responses-of-mice-in-laboratory-and-field-experiments
#10
Antonia E Musso, Regine Gries, Huimin Zhai, Stephen Takács, Gerhard Gries
Urine of male house mice, Mus musculus, is known to have primer pheromone effects on the reproductive physiology of female mice. Urine-mediated releaser pheromone effects that trigger certain behavioral responses are much less understood, and no field studies have investigated whether urine deposits by male or female mice, or synthetic mouse pheromone, increase trap captures of mice. In field experiments, we baited traps with bedding soiled with urine and feces of caged female or male mice, and recorded captures of mice in these and in control traps containing clean bedding...
January 27, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28120456/endothelin-1-mediates-natriuresis-but-not-polyuria-during-vitamin-d-induced-acute-hypercalcemia
#11
Natsuko Tokonami, Lydie Cheval, Isabelle Monnay, Guillaume Meurice, Johaness Loffing, Eric Feraille, Pascal Houillier
Acute hypercalcemia increases urinary sodium and water excretion; however, the underlying molecular mechanism remains unclear. As vitamin D-induced hypercalcemia increases the renal expression of endothelin (ET)-1, we hypothesized that ET-1 mediates the effects of hypercalcemia on renal sodium and water handling. Hypercalcemia was induced in 8 week-old, PTH-supplemented, male mice by oral administration of dihydrotachysterol (DHT) for 3 days. DHT-treated mice became hypercalcemic and displayed increased urinary water and sodium excretion compared to controls...
January 24, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28067796/combined-effects-of-androgen-and-growth-hormone-on-osteoblast-marker-expression-in-mouse-c2c12-and-mc3t3-e1-cells-induced-by-bone-morphogenetic-protein
#12
Kosuke Kimura, Tomohiro Terasaka, Nahoko Iwata, Takayuki Katsuyama, Motoshi Komatsubara, Ryota Nagao, Kenichi Inagaki, Fumio Otsuka
Osteoblasts undergo differentiation in response to various factors, including growth factors and steroids. Bone mass is diminished in androgen- and/or growth hormone (GH)-deficient patients. However the functional relationship between androgen and GH, and their combined effects on bone metabolism, remains unclear. Here we investigated the mutual effects of androgen and GH on osteoblastic marker expression using mouse myoblastic C2C12 and osteoblast-like MC3T3-E1 cells. Combined treatment with dihydrotestosterone (DHT) and GH enhanced BMP-2-induced expression of Runx2, ALP, and osteocalcin mRNA, compared with the individual treatments in C2C12 cells...
January 5, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28062795/silac-based-proteomics-of-primary-human-kidney-cells-reveals-a-novel-link-between-male-sex-hormones-and-impaired-energy-metabolism-in-diabetic-kidney-disease
#13
Sergi Clotet, Maria Jose Soler, Marta Riera, Julio Pascual, Fei Fang, Joyce Zhou, Ihor Batruch, Stella K Vasiliou, Apostolos Dimitromanolakis, Clara Barrios, Eleftherios Diamandis, James Scholey, Ana Konvalinka
Male sex predisposes to many kidney diseases. Considering that androgens exert deleterious effects in a variety of cell types within kidney, we hypothesized that dihydrotestosterone (DHT) would alter the biology of the renal tubular cell by inducing changes in the proteome. We employed stable isotope labeling with amino acids (SILAC) in an indirect spike-in fashion to accurately quantify the proteome in DHT- and 17β-estradiol (EST)-treated human proximal tubular epithelial cells (PTEC). Of the 5043 quantified proteins, 76 were differentially regulated...
January 4, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28062481/sex-specific-effects-of-sex-steroids-on-alveolar-epithelial-na-transport
#14
Melanie Haase, Mandy Laube, Ulrich H Thome
Alveolar fluid clearance mediates perinatal lung transition to air breathing in newborn infants, which is accomplished by epithelial Na+ channels (ENaC) and the Na,K-ATPase. Male sex represents a major risk factor for developing respiratory distress, especially in preterm infants. We previously showed that male sex is associated with reduced epithelial Na+ transport, possibly contributing to the sexual dimorphism in newborn respiratory distress. This study aimed to determine sex-specific effects of sex steroids on epithelial Na+ transport...
January 6, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28055971/src-promotes-castration-recurrent-prostate-cancer-through-androgen-receptor-dependent-canonical-and-non-canonical-transcriptional-signatures
#15
Indranil Chattopadhyay, Jianmin Wang, Maochun Qin, Lingqiu Gao, Renae Holtz, Robert L Vessella, Robert W Leach, Irwin H Gelman
Progression of prostate cancer (PC) to castration-recurrent growth (CRPC) remains dependent on sustained expression and transcriptional activity of the androgen receptor (AR). A major mechanism contributing to CRPC progression is through the direct phosphorylation and activation of AR by Src-family (SFK) and ACK1 tyrosine kinases. However, the AR-dependent transcriptional networks activated by Src during CRPC progression have not been elucidated. Here, we show that activated Src (Src527F) induces androgen-independent growth in human LNCaP cells, concomitant with its ability to induce proliferation/survival genes normally induced by dihydrotestosterone (DHT) in androgen-dependent LNCaP and VCaP cells...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/27999117/performance-of-mass-spectrometry-steroid-profiling-for-diagnosis-of-polycystic-ovary-syndrome
#16
D J Handelsman, H J Teede, R Desai, R J Norman, L J Moran
STUDY QUESTION: How well does multi-analyte steroid mass spectrometry (MS) profiling classify women with and without polycystic ovary syndrome (PCOS)? SUMMARY ANSWER: Our liquid chromatography MS (LC-MS) steroid profiling only minimally improves discrimination of women with and without PCOS compared with a direct testosterone immunoassay (T_IA) and the free androgen index (FAI). WHAT IS KNOWN ALREADY: Blood testosterone measured by direct (non-extraction) immunoassay overlaps between women with and without PCOS...
February 2017: Human Reproduction
https://www.readbyqxmd.com/read/27990661/association-of-obesity-related-hemodilution-of-prostate-specific-antigen-dihydrotestosterone-and-testosterone
#17
Zachary Klaassen, Lauren E Howard, Daniel M Moreira, Gerald L Andriole, Martha K Terris, Stephen J Freedland
BACKGROUND: Prostate-specific antigen (PSA) hemodilution is the leading theory for lower PSA values in obese men. However, testosterone and dihydrotestosterone (DHT), which are necessary for PSA production, are reduced in obese men. We assessed the relationship of body mass index (BMI) and PSA, taking into consideration the effect of testosterone and DHT. METHODS: Among 8,122 participants in Reduction by Dutasteride of Prostate Cancer Events (REDUCE), complete data were available for 7,275...
December 19, 2016: Prostate
https://www.readbyqxmd.com/read/27983870/kisspeptin-in-the-hypothalamus-of-two-rat-models-of-polycystic-ovary-syndrome
#18
Satoko Osuka, Akira Iwase, Tatsuo Nakahara, Mika Kondo, Ai Saito, Bayasula, Tomoko Nakamura, Sachiko Takikawa, Maki Goto, Tomomi Kotani, Fumitaka Kikkawa
Hyperandrogenism, disturbance of the hypothalamus-pituitary-ovary axis followed by elevated serum luteinizing hormone (LH) levels, and insulin resistance are involved in the complicated pathophysiology of polycystic ovary syndrome (PCOS). Kisspeptin is co-expressed with neurokinin B (NKB) in the arcuate nucleus (ARC), the center of the gonadotropin-releasing hormone (GnRH)-pulse generator that is responsible for pulsatile LH secretion. We compared two androgenized rat models of PCOS to evaluate the estrous cycle, hormonal profiles, and expression of kisspeptin and NKB in the ARC...
December 16, 2016: Endocrinology
https://www.readbyqxmd.com/read/27979488/testosterone-replacement-attenuates-intimal-hyperplasia-development-in-an-androgen-deficient-model-of-vascular-injury
#19
Brian M Freeman, Junior Univers, Richard K Fisher, Stacy S Kirkpatrick, Frederick A Klein, Michael B Freeman, Deidra J H Mountain, Oscar H Grandas
BACKGROUND: Androgen deficiency (AD) is associated with increased risk of vascular disease. Dysfunctional remodeling of the vessel wall and atypical proliferative potential of vascular smooth muscle cells (VSMCs) are fundamental processes in the development of intimal hyperplasia (IH). We have demonstrated an inverse relationship between dihydrotestosterone (DHT) levels, matrix metalloproteinase activity, and VSMC migration and proliferation in vitro. Here, we investigated the role of AD and testosterone (TST) replacement in IH development in an animal model of vascular injury to elucidate mechanisms modulated by AD that could be playing a role in the development of vascular pathogenesis...
January 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/27976414/low-testosterone-alters-the-activity-of-mouse-prostate-stem-cells
#20
Ye Zhou, Ben Copeland, Maya Otto-Duessel, Miaoling He, Susan Markel, Tim W Synold, Jeremy O Jones
BACKGROUND: Low serum testosterone (low T) has been repeatedly linked to worse outcomes in men with newly diagnosed prostate cancer (PC). How low T contributes to these outcomes is unknown. Here we demonstrate that exposure to low T causes significant changes in the mouse prostate and prostate stem cells. METHODS: Mice were castrated and implanted with capsules to achieve castrate, normal, or sub-physiological levels of T. After 6 weeks of treatment, LC-MS/MS was used to quantify the levels of T and dihydrotestosterone (DHT) in serum and prostate tissue...
December 14, 2016: Prostate
keyword
keyword
7440
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"