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https://www.readbyqxmd.com/read/29161816/a-rapid-and-efficient-desulfonation-method-for-the-analysis-of-glucosinolates-by-high-resolution-liquid-chromatography-coupled-with-quadrupole-time-of-flight-mass-spectrometry
#1
Jashbir Singh, Guddadarangavvanahal Jayaprakasha, Bhimanagouda S Patil
The goal of our present research was to develop a simple and rapid method for the quantitation of desulfoglucosinolates (desulfoGLS) without using column chromatography. The proposed method involves extraction, concentration, incubation of glucosinolates with sulfatase enzyme, and HPLC analysis. Identification of desulfoGLS in green kohlrabi was performed by LC-HR-ESI-QTOF-MS in positive ionization mode. A total 11 desulfoGLS were identified with neoglucobrassicin (3.32±0.05 µmol/g DW) as the predominant indolyl, whereas progoitrin and sinigrin were the major aliphatic desulfoGLS...
November 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29158997/presentation-and-treatments-for-mucopolysaccharidosis-type-ii-mps-ii-hunter-syndrome
#2
Molly Stapleton, Francyne Kubaski, Robert W Mason, Hiromasa Yabe, Yasuyuki Suzuki, Kenji E Orii, Tadao Orii, Shunji Tomatsu
Introduction: Mucopolysaccharidosis Type II (MPS II; Hunter syndrome) is an X- linked lysosomal storage disorder caused by a deficiency of iduronate-2-sulfatase (IDS). IDS deficiency leads to primary accumulation of dermatan sulfate (DS) and heparan sulfate (HS). MPS II is both multi-systemic and progressive. Phenotypes are classified as either attenuated or severe (based on absence or presence of central nervous system impairment, respectively). Areas covered: Current treatments available are intravenous enzyme replacement therapy (ERT), hematopoietic stem cell transplantation (HSCT), anti-inflammatory treatment, and palliative care with symptomatic surgeries...
2017: Expert Opinion on Orphan Drugs
https://www.readbyqxmd.com/read/29144294/higher-alkyl-sulfatase-activity-required-by-microbial-inhabitants-to-remove-anionic-surfactants-in-the-contaminated-surface-waters
#3
Bulent Icgen, Salih Batuhan Salik, Lale Goksu, Huseyin Ulusoy, Fadime Yilmaz
Biodegradation of anionic surfactants, like sodium dodecyl sulfate (SDS) are challenged by some bacteria through the function of the enzyme alkyl sulfatases. Therefore, identifying and characterizing bacteria capable of degrading SDS with high alkyl sulfatase enzyme activity are pivotal. In this study, bacteria isolated from surfactant contaminated river water were screened for their potential to degrade SDS. Primary screening carried out by the conventional enrichment culture technique and assessment of SDS-degrading ability through methylene blue active substance assay revealed 12, out of 290, SDS-degrading surface water bacteria with maximum SDS degrading abilities of 46-94% in 24-54 h...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29134502/the-influence-of-compatibility-of-rhubarb-and-radix-scutellariae-on-the-pharmacokinetics-of-anthraquinones-and-flavonoids-in-rat-plasma
#4
Yaqing Zhang, Zunjian Zhang, Rui Song
BACKGROUND AND OBJECTIVES: Rhubarb-Radix scutellariae is a classic herb pair, which is commonly used to clear away heat and toxin in clinic. The aim of this study was to investigate the influence of compatibility of Rhubarb and Radix scutellariae on the pharmacokinetic behaviors of anthraquinones and flavonoids in rat plasma. METHODS: Eighteen rats were randomly divided into three groups, and were orally administered Rhubarb and/or Radix scutellariae extracts. A sensitive and rapid UPLC-MS/MS method was developed and validated to determine the concentrations of baicalin, baicalein, wogonside, wogonin, rhein, and emodin in rat plasma...
November 14, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/29130021/transgenic-overexpression-of-steroid-sulfatase-alleviates-cholestasis
#5
Mengxi Jiang, Meishu Xu, Songrong Ren, Kyle W Selcer, Wen Xie
Background and Aim: Sulfotransferase (SULT)-mediated sulfation and steroid sulfatase (STS)-mediated desulfation represent two critical mechanisms that regulate the chemical and functional homeostasis of endogenous and exogenous molecules. STS catalyzes the hydrolysis of steroid sulfates to form hydroxysteroids. Oxygenated cholesterol derivative oxysterols are known to be endogenous ligands of the liver X receptor (LXR), a nuclear receptor with anti-cholestasis activity, whereas the sulfated oxysterols antagonize LXR signaling...
June 2017: Liver Res
https://www.readbyqxmd.com/read/29074704/characterizing-the-distribution-of-steroid-sulfatase-during-embryonic-development-when-and-where-might-metabolites-of-maternal-steroids-be-reactivated
#6
Ryan T Paitz, Kristin R Duffield, Rachel M Bowden
All vertebrate embryos are exposed to maternally derived steroids during development. In placental vertebrates, metabolism of maternal steroids by the placenta modulates embryonic exposure, but how exposure is regulated in oviparous vertebrates is less clear. Recent work in oviparous vertebrates has demonstrated that steroids are not static molecules, as they can be converted to more polar steroid sulfates by sulfotransferase enzymes. Importantly, these steroid sulfates can be converted back to the parent compound by the enzyme steroid sulfatase (STS)...
October 26, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29071491/correction-to-iris-study-a-phase-ii-study-of-the-steroid-sulfatase-inhibitor-irosustat-when-added-to-an-aromatase-inhibitor-in-er-positive-breast-cancer-patients
#7
Carlo Palmieri, Rob C Stein, Xinxue Liu, Emma Hudson, Hanna Nicholas, Hironobu Sasano, Fouzia Guestini, Chris Holcombe, Sophie Barrett, Laura Kenny, Sadie Reed, Adrian Lim, Larry Hayward, Sacha Howell, R Charles Coombes
In the original publication of the article, a part of acknowledgement section was missed out. The omitted acknowledgement is given below: 'The study was coordinated by the Imperial Clinical Trials Unit-Cancer, Imperial College London and Sponsored by Imperial College London. The Imperial Clinical Trials Unit receives funding from the National Institute for Health (NIHR) Biomedical Research Centre based at Imperial College Healthcare NHS Trust and Imperial College London. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health...
October 25, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29070681/differential-catalytic-promiscuity-of-the-alkaline-phosphatase-superfamily-bimetallo-core-reveals-mechanistic-features-underlying-enzyme-evolution
#8
Fanny Sunden, Ishraq AlSadhan, Artem Lyubimov, Tzanko Doukov, Jeffrey Swan, Daniel Herschlag
Members of enzyme superfamilies specialize in different reactions but often exhibit catalytic promiscuity for one anothers reactions, consistent with catalytic promiscuity as an important driver in the evolution of new enzymes. Wanting to understand how catalytic promiscuity and other factors may influence evolution across a superfamily, we turned to the well-studied Alkaline Phosphatase (AP) superfamily, comparing three of its members-two evolutionarily distinct phosphatases and a phosphodiesterase. We mutated distinguishing active-site residues to generate enzymes that had a common Zn(2+) bimetallo core, but little sequence similarity and different auxiliary domains...
October 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29062308/akkermansia-muciniphila-may-determine-chondroitin-sulfate-ameliorating-or-aggravating-osteoarthritis
#9
Qi Wang, Shui-Qing Huang, Chang-Qing Li, Qin Xu, Qing-Ping Zeng
Chondroitin sulfate (CS) has shown either ameliorating or aggravating effects on osteoarthritis (OA) in separately conducted clinical trials. Because CS is usually administered orally, it should be affected by or would impact on the individual gut microbiota. Evidence is accumulating that CS can nourish sulfatase-secreting bacteria (SSB) and sulfate-reducing bacteria (SRB). To decipher how can an individual gut microbiota determine the clinical values of CS for treatment on OA, we suggest here that CS would give distinct outcomes for OA treatment depending on Akkermansia muciniphila, a gut commensal probiotic bacterial species as optimal presence albeit also behaving as mucus-eroding bacteria (MEB) when abundant presence...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29054710/novel-p-carborane-containing-multitarget-anticancer-agents-inspired-by-the-metabolism-of-17%C3%AE-estradiol
#10
Asako Kaise, Kiminori Ohta, Yasuyuki Endo
The female hormone 17 β-estradiol (E2) is synthesized from estrone by steroid sulfatase (STS), and metabolized into 2-methoxyestradiol (2-ME), whereby the biological activity of the latter is substantially different from that of E2. Based on the metabolic pathways of E2, a carborane-containing 2-ME mimic (1c) and its derivatives (1 and 2) were designed and synthesized as novel multitarget anticancer agents. Bissulfamate 1f exhibited potent STS-inhibitory activity and tubulin-polymerization-inhibitory activity...
October 12, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29048999/structural-distortions-due-to-missense-mutations-in-human-formylglycine-generating-enzyme-leading-to-multiple-sulfatase-deficiency
#11
D Meshach Paul, Tania Chadah, B Senthilkumar, Rao Sethumadhavan, R Rajasekaran
The major candidate for multiple sulfatase deficiency is defective formylglycine-generating enzyme (FGE). Though adequately produced, mutations in FGE stall the activation of sulfatases and prevent their activity. Missense mutations viz., E130D, S155P, A177P, W179S, C218Y, R224W, N259I, P266L, A279V, C336R, R345C, A348P, R349Q and R349W associated with multiple sulfatase deficiency are yet to be computationally studied. Aforementioned mutants were initially screened through ws-SNPs&GO(3D) program. Mutant R345C acquired the highest score and hence was studied in detail...
October 19, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29032032/enzyme-inhibitory-activities-an-insight-into-the-structure-activity-relationship-of-biscoumarin-derivatives
#12
Muhammad Faisal, Aamer Saeed, Danish Shahzad, Tanzeela Abdul Fattah, Bhajan Lal, Pervaiz Ali Channar, Jamaluddin Mahar, Shomaila Saeed, Parvez Ali Mahesar, Fayaz Ali Larik
Biscoumarin derivatives, a dimeric form of coumarin, are well known derivatives of coumarin, occurred in the bioactive metabolites of marine and terrestrial organisms. On account of pharmacological and biological applications, biscoumarins have long been the subject of innumerable enzyme inhibition studies. In this review the pros and cons of enzyme inhibition studies of biscoumarins as urease inhibitors, aromatase inhibitors, NPPs, α-glucosidase inhibitors, α-amylase inhibitors, HIV-1 integrase inhibition, steroid sulfatase inhibitors and c-Met inhibitors are discussed in a systematic way...
December 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29029113/estrogen-metabolism-in-abdominal-subcutaneous-and-visceral-adipose-tissue-in-postmenopausal-women
#13
Natalia Hetemäki, Hanna Savolainen-Peltonen, Matti J Tikkanen, Feng Wang, Hanna Paatela, Esa Hämäläinen, Ursula Turpeinen, Mikko Haanpää, Veera Vihma, Tomi S Mikkola
CONTEXT: In postmenopausal women, adipose tissue (AT) levels of estrogens exceed circulating concentrations. While increased visceral AT after menopause is related to metabolic diseases, little is known about differences in estrogen metabolism between different AT depots. OBJECTIVE: We compared concentrations of and metabolic pathways producing estrone and estradiol in abdominal subcutaneous and visceral AT in postmenopausal women. DESIGN, SETTING, PATIENTS, AND INTERVENTIONS: AT and serum samples were obtained from 37 postmenopausal women undergoing surgery for non-malignant gynecological reasons...
September 29, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29017936/transporter-for-sulfated-steroid-hormones-in-the-testis-expression-pattern-biological-significance-and-implications-for-fertility-in-men-and-rodents
#14
D Fietz
In various tissues, steroid hormones may be sulfated, glucuronidated or otherwise modified. For a long time, these hydrophilic molecules have been considered to be merely inactive metabolites for excretion via bile or urine. Nevertheless, different organs such as the placenta and breast tissue produce large amounts of sulfated steroids. After the discovery of the enzyme steroid sulfatase, which is able to re-activate sulfated steroids, these precursor molecules entered the focus of interest again as a local supply for steroid hormone synthesis with a prolonged half-life compared to their unconjugated counterparts...
October 7, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28986657/influences-of-different-halophyte-vegetation-on-soil-microbial-community-at-temperate-salt-marsh
#15
Doongar R Chaudhary, Jinhyun Kim, Hojeong Kang
Salt marshes are transitional zone between terrestrial and aquatic ecosystems, occupied mainly by halophytic vegetation which provides numerous ecological services to coastal ecosystem. Halophyte-associated microbial community plays an important role in the adaptation of plants to adverse condition and also affected habitat characteristics. To explore the relationship between halophytes and soil microbial community, we studied the soil enzyme activities, soil microbial community structure, and functional gene abundance in halophytes- (Carex scabrifolia, Phragmites australis, and Suaeda japonica) covered and un-vegetated (mud flat) soils at Suncheon Bay, South Korea...
October 6, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28982977/3-sulfo-galactosyl-dependent-adhesion-of-escherichia-coli-hs-multivalent-adhesion-molecule-is-attenuated-by-sulfatase-activity
#16
Fitua Al-Saedi, Diana Pereira Vaz, Daniel H Stones, Anne Marie Krachler
Bacterial adhesion to host receptors is an early and essential step in bacterial colonization, and the nature of adhesin-receptor interactions determines bacterial localization and thus the outcome of these interactions. Here, we determined the host receptors for the Multivalent Adhesion Molecule (MAM) from the gut commensal E. coli HS (MAMHS), which contains an array of seven mammalian cell entry (MCE) domains. The MAMHS adhesin interacted with a range of host receptors, through recognition of a shared 3-O-sulfo-galactosyl moiety...
October 5, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28977889/human-steroid-sulfatase-induces-wnt-%C3%AE-catenin-signaling-and-epithelial-mesenchymal-transition-by-upregulating-twist1-and-hif-1%C3%AE-in-human-prostate-and-cervical-cancer-cells
#17
Sangyun Shin, Hee-Jung Im, Yeo-Jung Kwon, Dong-Jin Ye, Hyoung-Seok Baek, Donghak Kim, Hyung-Kyoon Choi, Young-Jin Chun
Steroid sulfatase (STS) catalyzes the hydrolysis of estrone sulfate and dehydroepiandrosterone sulfate (DHEAS) to their unconjugated biologically active forms. Although STS is considered a therapeutic target for estrogen-dependent diseases, the cellular functions of STS remain unclear. We found that STS induces Wnt/β-catenin s Delete ignaling in PC-3 and HeLa cells. STS increases levels of β-catenin, phospho-β-catenin, and phospho-GSK3β. Enhanced translocation of β-catenin to the nucleus by STS might activate transcription of target genes such as cyclin D1, c-myc, and MMP-7...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28974237/clinical-outcomes-in-idursulfase-treated-patients-with-mucopolysaccharidosis-type-ii-3-year-data-from-the-hunter-outcome-survey-hos
#18
Joseph Muenzer, Roberto Giugliani, Maurizio Scarpa, Anna Tylki-Szymańska, Virginie Jego, Michael Beck
BACKGROUND: Mucopolysaccharidosis type II (MPS II; Hunter syndrome) is a rare, X-linked disorder caused by deficient activity of the enzyme iduronate-2-sulfatase (I2S). Treatment is available in the form of enzyme replacement therapy (ERT) with recombinant I2S. Clinical outcomes following ≥3 years of ERT with idursulfase were investigated in a broad population of patients with MPS II enrolled in the Hunter Outcome Survey (HOS). METHODS: As of January 2016, 639 patients (excluding female patients, individuals who had received a bone marrow transplant and those enrolled in the phase 1/2 [TKT018] or phase 2/3 [TKT024] clinical trial) followed prospectively in the registry had received idursulfase for ≥6 months...
October 3, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28971759/steroidal-oximes-useful-compounds-with-antitumor-activities
#19
Catarina Canário, Samuel Silvestre, Amílcar Falcão, Gilberto Alves
BACKGROUND: Steroids play an important role in life because they can regulate a variety of biological processes and have been widely used in medicine namely as anti-inflammatory, anabolic, contraceptives and anticancer drugs. In recent years, there has been an increasing interest in the introduction of the oxime group in a large variety of molecules in order to increase their biological effects. This review highlights steroidal oximes with anticancer properties and their potential mechanisms of action, as well as data on their relative potencies reported in literature in the last few years...
October 3, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28967960/heterologous-expression-in-pichia-pastoris-and-biochemical-characterization-of-the-unmodified-sulfatase-from-fusarium-proliferatum-le1
#20
Svetlana A Korban, Kirill S Bobrov, Maria A Maynskova, Stanislav N Naryzhny, Olga L Vlasova, Elena V Eneyskaya, Anna A Kulminskaya
No abstract text is available yet for this article.
August 1, 2017: Protein Engineering, Design & Selection: PEDS
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