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https://www.readbyqxmd.com/read/28332366/soluble-cd93-in-serum-as-a-marker-of-allergic-inflammation
#1
Hye Jung Park, Heejae Han, Sang Chul Lee, Young Woong Son, Da Woon Sim, Kyung Hee Park, Yoon Hee Park, Kyoung Yong Jeong, Jung Won Park, Jae Hyun Lee
PURPOSE: CD93 is receiving renewed attention as a biomarker of inflammation. We aimed to evaluate the potential for serum sCD93 to serve as a novel biomarker for allergic inflammation. MATERIALS AND METHODS: We enrolled 348 subjects with an allergic disease [allergic rhinitis (AR), chronic spontaneous urticaria (CSU), or bronchial asthma (BA)], including 14 steroid-naïve BA patients who were serially followed-up. RESULTS: The serum sCD93 levels (ng/mL) in patients with exacerbated AR (mean±standard deviation, 153...
May 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28328038/superbasic-alkyl-substituted-bisphosphazene-proton-sponges-a-new-class-of-deprotonating-matrices-for-negative-ion-matrix-assisted-ionization-laser-desorption-mass-spectrometry-of-low-molecular-weight-hardly-ionizable-analytes
#2
C D Calvano, T R I Cataldi, J F Kögel, A Monopoli, F Palmisano, J Sundermeyer
RATIONALE: Here hardly ionizable and low molecular weight compounds are detected in negative ion mode by using novel superbasic proton sponges based on 1,8-bisphosphazenylnaphthalene (PN) as MALDI matrices. Among the selected proton sponges, 1,8-bis(trispyrrolidinophosphazenyl)naphthalene (TPPN) has shown the best behaviour as matrix since it allows the direct detection of intact cholesterol without derivatization also in real challenging samples. METHODS: Very weakly acidic compounds such as sterols, steroids, fatty alcohols and saccharides were detected in reflectron negative ion mode by a MALDI TOF/TOF system equipped with a neodymium-doped yttrium lithium fluoride (Nd:YLF) laser (345 nm) with typical mass accuracy of 10 ppm...
July 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28326039/estrone-sulfate-transport-and-steroid-sulfatase-activity-in-colorectal-cancer-implications-for-hormone-replacement-therapy
#3
Lorna C Gilligan, Ali Gondal, Vivien Tang, Maryam T Hussain, Anastasia Arvaniti, Anne-Marie Hewitt, Paul A Foster
Hormone replacement therapy (HRT) affects the incidence and potential progression of colorectal cancer (CRC). As HRT primarily consists of estrone sulfate (E1S), understanding whether this conjugated estrogen is transported and metabolized in CRC will define its potential effect in this malignancy. Here, we show that a panel of CRC cell lines (Colo205, Caco2, HCT116, HT-29) have steroid sulfatase (STS) activity, and thus can hydrolyze E1S. STS activity is significantly higher in CRC cell lysate, suggesting the importance of E1S transport in intracellular STS substrate availability...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28324030/early-prenatal-phthalate-exposure-sex-steroid-hormones-and-newborn-birth-outcomes
#4
Sheela Sathyanarayana, Samantha Butts, Christina Wang, Emily Barrett, Ruby Nguyen, Stephen M Schwartz, Wren Haaland, Shanna H Swan
Background: Adequate sex steroid hormone concentrations are essential for normal fetal genital development in early pregnancy. Our previous study demonstrated an inverse relationship between third trimester di-ethyl hexyl (DEHP) phthalate exposure and total testosterone (TT) concentrations. Here, we examine early pregnancy phthalates, sex steroid hormone concentrations, and newborn reproductive outcomes. Methods: We examined associations between urinary phthalate metabolite concentrations in early pregnancy and serum free testosterone (FT), TT, estrone (E1), and estradiol (E2) in 591 woman/infant dyads in The Infant Development and Environment Study; we also examined relationships between hormones and newborn genital outcomes using multiple regression models with covariate adjustment...
March 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28319043/glucocorticoid-receptors-finding-the-middle-ground
#5
Sofie J Desmet, Karolien De Bosscher
Glucocorticoids (GCs; referred to clinically as corticosteroids) are steroid hormones with potent anti-inflammatory and immune modulatory profiles. Depending on the context, these hormones can also mediate pro-inflammatory activities, thereby serving as primers of the immune system. Their target receptor, the GC receptor (GR), is a multi-tasking transcription factor, changing its role and function depending on cellular and organismal needs. To get a clearer idea of how to improve the safety profile of GCs, recent studies have investigated the complex mechanisms underlying GR functions...
March 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28314858/identification-and-characterization-of-a-20%C3%AE-hydroxysteroid-dehydrogenase-from-the-anaerobic-gut-bacterium-butyricicoccus-desmolans-atcc-43058
#6
Saravanan Devendran, Celia Méndez-Garcia, Jason M Ridlon
Members of the gastrointestinal microbiota are known to convert glucocorticoids to androstanes, which can be subsequently converted to potent androgens by other members of the gut microbiota or host tissues. Butyricicoccus desmolans and Clostridium cadaveris has previously been reported for steroid-17,20-desmolase and 20β-hydroxysteroid dehydrogenase (20β-HSDH) activities that were responsible for androstane formation from cortisol, however the gene encoding these enzymes has yet to be reported. In this work, we identified and located a gene encoding 20β-HSDH in both B...
March 17, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28298181/early-onset-of-adck4-glomerulopathy-with-renal-failure-a-case-report
#7
Ksenija Lolin, Benedetta D Chiodini, Elise Hennaut, Brigitte Adams, Karin Dahan, Khalid Ismaili
BACKGROUND: We present a rare early presentation of a ADCK4-related glomerulopathy. This case is of interest as potentially treatable if genetic results are timely obtained. CASE PRESENTATION: We report the case of a 5-year-old boy who was identified with significant proteinuria by a urinary routine screening program for school children. Physical examination revealed dysplastic ears and abnormal folded pinna. Albumin level was 41 g/L (39-53 g/L), and urine proteins/creatinine ratio was 2...
March 16, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28296258/identification-and-characterization-of-novel-long-term-metabolites-of-oxymesterone-and-mesterolone-in-human-urine-by-application-of-srm-gc-ci-ms-ms
#8
Michael Polet, Wim Van Gansbeke, Lore Geldof, Koen Deventer, Peter Van Eenoo
The search for metabolites with longer detection times remains an important task in for example toxicology and doping control. The impact of these long term metabolites is highlighted by the high number of positive cases after reanalysis of samples that were stored for several years, e.g. samples of previous Olympic Games. A substantial number of previously alleged negative samples have now been declared positive due to the detection of various long term steroid metabolites of which the existence was unknown during the Olympic Games of 2008 and 2012...
March 11, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28295192/state-of-the-art-how-i-manage-immune-thrombocytopenia
#9
REVIEW
Nichola Cooper
The management of patients with immune thrombocytopenia (ITP) is rapidly evolving. Over the last 15 years, a number of novel treatments have improved practice, with many steroid-sparing agents and a reduction in the progression to splenectomy. Although this has improved clinical care, many therapeutic challenges remain. There is no diagnostic test, no biomarkers to direct treatment and few comparative studies to help management decisions. Development of up to date guidelines is difficult with little high-grade evidence...
March 10, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28293633/combined-ligand-structure-based-virtual-screening-and-molecular-dynamics-simulations-of-steroidal-androgen-receptor-antagonists
#10
Yuwei Wang, Rui Han, Huimin Zhang, Hongli Liu, Jiazhong Li, Huanxiang Liu, Paola Gramatica
The antiandrogens, such as bicalutamide, targeting the androgen receptor (AR), are the main endocrine therapies for prostate cancer (PCa). But as drug resistance to antiandrogens emerges in advanced PCa, there presents a high medical need for exploitation of novel AR antagonists. In this work, the relationships between the molecular structures and antiandrogenic activities of a series of 7α-substituted dihydrotestosterone derivatives were investigated. The proposed MLR model obtained high predictive ability...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28290516/antagonizing-effects-of-membrane-acting-androgens-on-the-eicosanoid-receptor-oxer1-in-prostate-cancer
#11
Konstantina Kalyvianaki, Veronika Gebhart, Nikolaos Peroulis, Christina Panagiotopoulou, Fotini Kiagiadaki, Iosif Pediaditakis, Michalis Aivaliotis, Eleni Moustou, Maria Tzardi, George Notas, Elias Castanas, Marilena Kampa
Accumulating evidence during the last decades revealed that androgen can exert membrane initiated actions that involve signaling via specific kinases and the modulation of significant cellular processes, important for prostate cancer cell growth and metastasis. Results of the present work clearly show that androgens can specifically act at the membrane level via the GPCR oxoeicosanoid receptor 1 (OXER1) in prostate cancer cells. In fact, OXER1 expression parallels that of membrane androgen binding in prostate cancer cell lines and tumor specimens, while in silico docking simulation of OXER1 showed that testosterone could bind to OXER1 within the same grove as 5-OxoETE, the natural ligand of OXER1...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28290501/steroidal-17-16-d-pyrimidines-derived-from-dehydroepiandrosterone-a-convenient-synthesis-antiproliferation-activity-structure-activity-relationships-and-role-of-heterocyclic-moiety
#12
Shaoyong Ke, Liqiao Shi, Zhigang Zhang, Ziwen Yang
A series of steroidal[17,16-d]pyrimidines derived from dehydroepiandrosterone were designed and prepared by a convenient heterocyclization reaction. The in vitro anticancer activities for these obtained compounds were evaluated against human cancer cell lines (HepG2, Huh-7, and SGC-7901), which demonstrated that some of these heterocyclic pyrimidine derivatives exhibited significantly good cytotoxic activities against all tested cell lines compared with 5-fluorouracil (5-FU), especially, compound 3b exhibited high potential growth inhibitory activities against all tested cell lines with the IC50 values of 5...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28289708/interruption-of-ox40l-signaling-prevents-costimulation-blockade-resistant-allograft-rejection
#13
William H Kitchens, Ying Dong, David V Mathews, Cynthia P Breeden, Elizabeth Strobert, Maria E Fuentes, Christian P Larsen, Mandy L Ford, Andrew B Adams
The potential of costimulation blockade to serve as a novel transplant immunosuppression strategy has been explored for over 20 years, culminating in the recent clinical approval of belatacept for renal transplant patients. Despite improving long-term graft function and survival compared with calcineurin inhibitors, clinical acceptance of belatacept has been hindered by elevated rates of acute rejection. We examined the signaling pathways required to activate costimulation blockade-resistant alloreactive T cells and identified the OX40/OX40L secondary costimulatory pathway as a promising target...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28280360/arenobufagin-activates-p53-to-trigger-esophageal-squamous-cell-carcinoma-cell-apoptosis-in-vitro-and-in-vivo
#14
Junhong Lv, Shaohuan Lin, Panli Peng, Changqing Cai, Jianming Deng, Mingzhi Wang, Xuejun Li, Rongsheng Lin, Yu Lin, Ailing Fang, Qiling Li
Esophageal squamous cell carcinoma (ESCC) is often diagnosed at late incurable stage and lacks effective treatment strategy. Bufadienolides are cardiotonic steroids isolated from the skin and parotid venom glands of the toad Bufo bufo gargarizans Cantor with novel anticancer activity. However, there is little information about the effects and action mechanisms of bufadienolides on ESCC cells. In this study, the in vitro and in vivo anti-ESCC activities of bufadienolides, including bufalin (Bu) and arenobufagin (ArBu), were examined and the underlying molecular mechanisms were elucidated...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28275781/aqueous-extracts-from-asparagus-stems-prevent-memory-impairments-in-scopolamine-treated-mice
#15
Zifang Sui, Ce Qi, Yunxiang Huang, Shufeng Ma, Xinguo Wang, Guowei Le, Jin Sun
Aqueous extracts from Asparagus officinalis L. stems (AEAS) are rich in polysaccharides, gamma-amino butyric acid (GABA), and steroidal saponin. This study was designed to investigate the effects of AEAS on learning, memory, and acetylcholinesterase-related activity in a scopolamine-induced model of amnesia. Sixty ICR mice were randomly divided into 6 groups (n = 10) including the control group (CT), scopolamine group (SC), donepezil group (DON), low, medium, and high dose groups of AEAS (LS, MS, HS; 1.6 mL kg(-1), 8 mL kg(-1), 16 mL kg(-1))...
March 9, 2017: Food & Function
https://www.readbyqxmd.com/read/28274720/functional-analysis-of-a-novel-repressor-luxr-in-comamonas-testosteroni
#16
Ye Ji, Tianyuan Pan, Yang Zhang, Guangming Xiong, Yuanhua Yu
Comamonas testosteroni (C. testosteroni) ATCC11996 is a gram negative bacterium which can use steroid as a carbon and energy source. 3,17β-hydroxysteroid dehydrogenase (3,17β-HSD) is a key enzyme for the degradation of steroid hormones in C. testosteroni. The LuxR regulation family is a group of regulatory proteins which play important role in gram negative bacterium. The luxr gene is located on 58 kb upstream of 3,17β-HSD gene with the opposite transcription orientation in the chromosomal DNA of C. testosteroni...
March 6, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28274682/glucocorticoids-and-reproduction-traffic-control-on-the-road-to-reproduction
#17
REVIEW
Shannon Whirledge, John A Cidlowski
Glucocorticoids are steroid hormones that regulate diverse cellular functions and are essential to facilitate normal physiology. However, stress-induced levels of glucocorticoids result in several pathologies including profound reproductive dysfunction. Compelling new evidence indicates that glucocorticoids are crucial to the establishment and maintenance of reproductive function. The fertility-promoting or -inhibiting activity of glucocorticoids depends on timing, dose, and glucocorticoid responsiveness within a given tissue, which is mediated by the glucocorticoid receptor (GR)...
March 5, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28273804/domain-4-d4-of-perfringolysin-o-to-visualize-cholesterol-in-cellular-membranes-the-update
#18
REVIEW
Masashi Maekawa
The cellular membrane of eukaryotes consists of phospholipids, sphingolipids, cholesterol and membrane proteins. Among them, cholesterol is crucial for various cellular events (e.g., signaling, viral/bacterial infection, and membrane trafficking) in addition to its essential role as an ingredient of steroid hormones, vitamin D, and bile acids. From a micro-perspective, at the plasma membrane, recent emerging evidence strongly suggests the existence of lipid nanodomains formed with cholesterol and phospholipids (e...
March 3, 2017: Sensors
https://www.readbyqxmd.com/read/28273501/pharmacological-evaluation-of-9-10-dihydrochromeno-8-7-e-1-3-oxazin-2-8h-one-derivatives-as-potent-anti-inflammatory-agent
#19
Hong-Jian Zhang, Yan-Fei Li, Qi Cao, Yu-Shun Tian, Zhe-Shan Quan
BACKGROUND: Non-steroidal anti-inflammatory drugs (NSAIDs) are the most widely administered drugs for the treatment of inflammation. However, they usually cause some unexpected side effects. Coumarins and their derivatives exhibit broad-spectrum biological activities. In order to develop new anti-inflammatory drugs with high anti-inflammatory activity and less side effects, a series of 9-substituted-9,10-dihydrochromeno[8,7-e][1,3]oxazin-2(8H)-one derivatives were designed, synthesized, and screened for their anti-inflammatory activities...
December 14, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28272894/1-4-substituted-triazoles-as-nonsteroidal-anti-androgens-for-prostate-cancer-treatment
#20
Claudia Ferroni, Antonella Pepe, Yeong Sang Kim, Sunmin Lee, Andrea Guerrini, Marco Daniele Parenti, Anna Tesei, Alice Zamagni, Michela Cortesi, Nadia Zaffaroni, Michelandrea De Cesare, Giovanni Luca Beretta, Jane B Trepel, Sanjay V Malhotra, Greta Varchi
Prostate cancer (PC) is the fifth leading cause of cancer death in men, and the androgen receptor (AR) represents the primary target for PC treatment, even though the disease frequently progresses toward androgen-independent forms. Most of the commercially available nonsteroidal antiandrogens show a common scaffold consisting of two aromatic rings connected by a linear or a cyclic spacer. By taking advantage of a facile, one-pot click chemistry reaction, we report herein the preparation of a small library of novel 1,4-substituted triazoles with AR antagonistic activity...
March 20, 2017: Journal of Medicinal Chemistry
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