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Churchman LR, Beckett JR, Tan L, Woods K, Doherty DZ, Ghith A, Bernhardt PV, Bell SG, West NP, De Voss JJ. Synthesis of steroidal inhibitors for Mycobacterium tuberculosis. J Steroid Biochem Mol Biol 2024; 239:106479. [PMID: 38346478 DOI: 10.1016/j.jsbmb.2024.106479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/23/2024] [Accepted: 02/07/2024] [Indexed: 02/19/2024]
Abstract
Oxidised derivatives of cholesterol have been shown to inhibit the growth of Mycobacterium tuberculosis (Mtb). The bacteriostatic activity of these compounds has been attributed to their inhibition of CYP125A1 and CYP142A1, two metabolically critical cytochromes P450 that initiate degradation of the sterol side chain. Here, we synthesise and characterise an extensive library of 28 cholesterol derivatives to develop a structure-activity relationship for this class of inhibitors. The candidate compounds were evaluated for MIC with virulent Mtb and in binding studies with CYP125A1 and CYP142A1 from Mtb.
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Affiliation(s)
- Luke R Churchman
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - James R Beckett
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Lendl Tan
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Kyra Woods
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Daniel Z Doherty
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Amna Ghith
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Stephen G Bell
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Nicholas P West
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - James J De Voss
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
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2
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Semi-Synthesis and Biological Evaluation of 25(R)-26-Acetoxy-3β,5α-Dihydroxycholest-6-One. Mar Drugs 2023; 21:md21030191. [PMID: 36976240 PMCID: PMC10053440 DOI: 10.3390/md21030191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/18/2023] [Accepted: 03/18/2023] [Indexed: 03/22/2023] Open
Abstract
Previously, we identified a series of steroids (1–6) that showed potent anti-virus activities against respiratory syncytial virus (RSV), with IC50 values ranging from 3.23 to 0.19 µM. In this work, we first semi-synthesized and characterized the single isomer of 5, 25(R)-26-acetoxy-3β,5α-dihydroxycholest-6-one, named as (25R)-5, in seven steps from a commercially available compound diosgenin (7), with a total yield of 2.8%. Unfortunately, compound (25R)-5 and the intermediates only showed slight inhibitions against RSV replication at the concentration of 10 µM, but they possessed potent cytotoxicity activities against human bladder cancer 5637 (HTB-9) and hepatic cancer HepG2, with IC50 values ranging from 3.0 to 15.5 µM without any impression of normal liver cell proliferation at 20 µM. Among them, the target compound (25R)-5 possessed cytotoxicity activities against 5637 (HTB-9) and HepG2 with IC50 values of 4.8 µM and 15.5 µM, respectively. Further studies indicated that compound (25R)-5 inhibited cancer cell proliferation through inducing early and late-stage apoptosis. Collectively, we have semi-synthesized, characterized and biologically evaluated the 25R-isomer of compound 5; the biological results suggested that compound (25R)-5 could be a good lead for further anti-cancer studies, especially for anti-human liver cancer.
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3
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El Atab O, Darwiche R, Truax NJ, Schneiter R, Hull KG, Romo D, Asojo OA. Necator americanus Ancylostoma Secreted Protein-2 ( Na-ASP-2) Binds an Ascaroside (ascr#3) in Its Fatty Acid Binding Site. Front Chem 2020; 8:608296. [PMID: 33392151 PMCID: PMC7773830 DOI: 10.3389/fchem.2020.608296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 11/25/2020] [Indexed: 11/28/2022] Open
Abstract
During their infective stages, hookworms release excretory-secretory (E-S) products, small molecules, and proteins to help evade and suppress the host's immune system. Small molecules found in E-S products of mammalian hookworms include nematode derived metabolites like ascarosides, which are composed of the sugar ascarylose linked to a fatty acid side chain. The most abundant proteins found in hookworm E-S products are members of the protein family known as Ancylostoma secreted protein (ASP). In this study, two ascarosides and their fatty acid moieties were synthesized and tested for in vitro binding to Na-ASP-2 using both a ligand competition assay and microscale thermophoresis. The fatty acid moieties of both ascarosides tested and ascr#3, an ascaroside found in rat hookworm E-S products, bind to Na-ASP-2's palmitate binding cavity. These molecules were confirmed to bind to the palmitate but not the sterol binding sites. An ascaroside, oscr#10, which is not found in hookworm E-S products, does not bind to Na-ASP-2. More studies are required to determine the structural basis of ascarosides binding by Na-ASP-2 and to understand the physiological significance of these observations.
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Affiliation(s)
- Ola El Atab
- Division of Biochemistry, Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Rabih Darwiche
- Division of Biochemistry, Department of Biology, University of Fribourg, Fribourg, Switzerland
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, United States
| | - Nathanyal J. Truax
- Department of Chemistry and Biochemistry & The CPRIT Synthesis and Drug-Lead Discovery Laboratory, Baylor University, Waco, TX, United States
| | - Roger Schneiter
- Division of Biochemistry, Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Kenneth G. Hull
- Department of Chemistry and Biochemistry & The CPRIT Synthesis and Drug-Lead Discovery Laboratory, Baylor University, Waco, TX, United States
| | - Daniel Romo
- Department of Chemistry and Biochemistry & The CPRIT Synthesis and Drug-Lead Discovery Laboratory, Baylor University, Waco, TX, United States
| | - Oluwatoyin A. Asojo
- Department of Chemistry and Biochemistry, Hampton University, Hampton, VA, United States
- National School of Tropical Medicine, Baylor College of Medicine, Houston, TX, United States
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4
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Penkov S, Raghuraman BK, Erkut C, Oertel J, Galli R, Ackerman EJM, Vorkel D, Verbavatz JM, Koch E, Fahmy K, Shevchenko A, Kurzchalia TV. A metabolic switch regulates the transition between growth and diapause in C. elegans. BMC Biol 2020; 18:31. [PMID: 32188449 PMCID: PMC7081555 DOI: 10.1186/s12915-020-0760-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 02/27/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Metabolic activity alternates between high and low states during different stages of an organism's life cycle. During the transition from growth to quiescence, a major metabolic shift often occurs from oxidative phosphorylation to glycolysis and gluconeogenesis. We use the entry of Caenorhabditis elegans into the dauer larval stage, a developmentally arrested stage formed in response to harsh environmental conditions, as a model to study the global metabolic changes and underlying molecular mechanisms associated with growth to quiescence transition. RESULTS Here, we show that the metabolic switch involves the concerted activity of several regulatory pathways. Whereas the steroid hormone receptor DAF-12 controls dauer morphogenesis, the insulin pathway maintains low energy expenditure through DAF-16/FoxO, which also requires AAK-2/AMPKα. DAF-12 and AAK-2 separately promote a shift in the molar ratios between competing enzymes at two key branch points within the central carbon metabolic pathway diverting carbon atoms from the TCA cycle and directing them to gluconeogenesis. When both AAK-2 and DAF-12 are suppressed, the TCA cycle is active and the developmental arrest is bypassed. CONCLUSIONS The metabolic status of each developmental stage is defined by stoichiometric ratios within the constellation of metabolic enzymes driving metabolic flux and controls the transition between growth and quiescence.
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Affiliation(s)
- Sider Penkov
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany. .,Paul Langerhans Institute Dresden of the Helmholtz Zentrum München at the University Hospital and Faculty of Medicine Carl Gustav Carus of TU Dresden, Dresden, Germany. .,Institute for Clinical Chemistry and Laboratory Medicine, University Clinic and Medical Faculty, TU Dresden, Dresden, Germany.
| | | | - Cihan Erkut
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany.,Present address: German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jana Oertel
- Institute of Resource Ecology at the Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - Roberta Galli
- Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, TU Dresden, Dresden, Germany
| | | | - Daniela Vorkel
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Jean-Marc Verbavatz
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany.,Institut Jacques Monod, Université de Paris/CNRS, Paris, France
| | - Edmund Koch
- Faculty of Medicine Carl Gustav Carus, Department of Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, TU Dresden, Dresden, Germany
| | - Karim Fahmy
- Institute of Resource Ecology at the Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - Andrej Shevchenko
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
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5
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Sagimori I, Yoshioka H, Hashimoto Y, Ohgane K. Luciferase-based HMG-CoA reductase degradation assay for activity and selectivity profiling of oxy(lano)sterols. Bioorg Med Chem 2020; 28:115298. [PMID: 31902650 DOI: 10.1016/j.bmc.2019.115298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/21/2019] [Accepted: 12/25/2019] [Indexed: 11/18/2022]
Abstract
HMG-CoA reductase (HMGCR) is the rate-limiting enzyme in the cholesterol biosynthetic pathway, and is the target of cholesterol-lowering drugs, statins. Previous studies have demonstrated that the enzyme activity is regulated by sterol-induced degradation in addition to transcriptional regulation through sterol-regulatory-element-binding proteins (SREBPs). While 25-hydroxycholesterol induces both HMGCR degradation and SREBP inhibition in a nonselective manner, lanosterol selectively induces HMGCR degradation. Here, to clarify the structural determinants of selectivity for the two activities, we established a luciferase-based assay monitoring HMGCR degradation and used it to profile the structure-activity/selectivity relationships of oxysterols and (oxy)lanosterols. We identified several sterols that selectively induce HMGCR degradation and one sterol, 25-hydroxycholest-4-en-3-one, that selectively inhibits the SREBP pathway. These results should be helpful in designing more potent and selective HMGCR degraders.
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Affiliation(s)
- Ikuya Sagimori
- Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
| | - Hiromasa Yoshioka
- Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
| | - Yuichi Hashimoto
- Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
| | - Kenji Ohgane
- Institute for Quantitative Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.
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6
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Cholesterol Binding to the Transmembrane Region of a Group 2 Hemagglutinin (HA) of Influenza Virus Is Essential for Virus Replication, Affecting both Virus Assembly and HA Fusion Activity. J Virol 2019; 93:JVI.00555-19. [PMID: 31118253 DOI: 10.1128/jvi.00555-19] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 05/14/2019] [Indexed: 12/21/2022] Open
Abstract
Hemagglutinin (HA) of influenza virus is incorporated into cholesterol-enriched nanodomains of the plasma membrane. Phylogenetic group 2 HAs contain the conserved cholesterol consensus motif (CCM) YKLW in the transmembrane region. We previously reported that mutations in the CCM retarded intracellular transport of HA and decreased its nanodomain association. Here, we analyzed whether cholesterol interacts with the CCM. Incorporation of photocholesterol into HA was significantly reduced if the whole CCM is replaced by alanine, both using immunoprecipitated HA and when HA is embedded in the membrane. We next used reverse genetics to investigate the significance of the CCM for virus replication. No virus was rescued if the whole motif is exchanged (YKLW4A); singly (LA) or doubly (YK2A and LW2A) mutated virus showed decreased titers and a comparative fitness disadvantage. In polarized cells, transport of HA mutants to the apical membrane was not disturbed. Reduced amounts of HA and cholesterol were incorporated into the viral membrane. Mutant viruses exhibit a decrease in hemolysis, which is only partially corrected if the membrane is replenished with cholesterol. More specifically, viruses have a defect in hemifusion, as demonstrated by fluorescence dequenching. Cells expressing HA YKLW4A fuse with erythrocytes, but the number of events is reduced. Even after acidification unfused erythrocytes remain cell bound, a phenomenon not observed with wild-type HA. We conclude that cholesterol binding to a group 2 HA is essential for virus replication. It has pleiotropic effects on virus assembly and membrane fusion, mainly on lipid mixing and possibly a preceding step.IMPORTANCE The glycoprotein HA is a major pathogenicity factor of influenza viruses. Whereas the structure and function of HA's ectodomain is known in great detail, similar data for the membrane-anchoring part of the protein are missing. Here, we demonstrate that the transmembrane region of a group 2 HA interacts with cholesterol, the major lipid of the plasma membrane and the defining element of the viral budding site nanodomains of the plasma membrane. The cholesterol binding motif is essential for virus replication. Its partial removal affects various steps of the viral life cycle, such as assembly of new virus particles and their subsequent cell entry via membrane fusion. A cholesterol binding pocket in group 2 HAs might be a promising target for a small lipophilic drug that inactivates the virus.
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7
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Galles C, Prez GM, Penkov S, Boland S, Porta EOJ, Altabe SG, Labadie GR, Schmidt U, Knölker HJ, Kurzchalia TV, de Mendoza D. Endocannabinoids in Caenorhabditis elegans are essential for the mobilization of cholesterol from internal reserves. Sci Rep 2018; 8:6398. [PMID: 29686301 PMCID: PMC5913221 DOI: 10.1038/s41598-018-24925-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 04/11/2018] [Indexed: 12/17/2022] Open
Abstract
Proper cholesterol transport is crucial for the functionality of cells. In C. elegans, certain cholesterol derivatives called dafachronic acids (DAs) govern the entry into diapause. In their absence, worms form a developmentally arrested dauer larva. Thus, cholesterol transport to appropriate places for DA biosynthesis warrants the reproductive growth. Recently, we discovered a novel class of glycosphingolipids, PEGCs, required for cholesterol mobilization/transport from internal storage pools. Here, we identify other components involved in this process. We found that strains lacking polyunsaturated fatty acids (PUFAs) undergo increased dauer arrest when grown without cholesterol. This correlates with the depletion of the PUFA-derived endocannabinoids 2-arachidonoyl glycerol and anandamide. Feeding of these endocannabinoids inhibits dauer formation caused by PUFAs deficiency or impaired cholesterol trafficking (e.g. in Niemann-Pick C1 or DAF-7/TGF-β mutants). Moreover, in parallel to PEGCs, endocannabinoids abolish the arrest induced by cholesterol depletion. These findings reveal an unsuspected function of endocannabinoids in cholesterol trafficking regulation.
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Affiliation(s)
- Celina Galles
- Laboratorio de Fisiología Microbiana, Instituto de Biología Molecular y Celular de Rosario (IBR), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, 2000, Rosario, Argentina
| | - Gastón M Prez
- Laboratorio de Fisiología Microbiana, Instituto de Biología Molecular y Celular de Rosario (IBR), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, 2000, Rosario, Argentina
| | - Sider Penkov
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307, Dresden, Germany
| | - Sebastian Boland
- Department of Genetics and Complex Diseases and Department of Cell Biology, Harvard T.H. Chan School of Public Health and Harvard Medical School, Boston, MA, 02115, USA
| | - Exequiel O J Porta
- Instituto de Química Rosario (IQUIR), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, 2000, Rosario, Argentina
| | - Silvia G Altabe
- Laboratorio de Fisiología Microbiana, Instituto de Biología Molecular y Celular de Rosario (IBR), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, 2000, Rosario, Argentina
| | - Guillermo R Labadie
- Instituto de Química Rosario (IQUIR), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, 2000, Rosario, Argentina
| | - Ulrike Schmidt
- Department Chemie, Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden, Bergstr. 66, 01069, Dresden, Germany
| | - Teymuras V Kurzchalia
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307, Dresden, Germany.
| | - Diego de Mendoza
- Laboratorio de Fisiología Microbiana, Instituto de Biología Molecular y Celular de Rosario (IBR), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, 2000, Rosario, Argentina.
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8
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Warnke M, Jacoby C, Jung T, Agne M, Mergelsberg M, Starke R, Jehmlich N, von Bergen M, Richnow HH, Brüls T, Boll M. A patchwork pathway for oxygenase-independent degradation of side chain containing steroids. Environ Microbiol 2017; 19:4684-4699. [PMID: 28940833 DOI: 10.1111/1462-2920.13933] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/11/2017] [Accepted: 09/14/2017] [Indexed: 12/22/2022]
Abstract
The denitrifying betaproteobacterium Sterolibacterium denitrificans serves as model organism for studying the oxygen-independent degradation of cholesterol. Here, we demonstrate its capability of degrading various globally abundant side chain containing zoo-, phyto- and mycosterols. We provide the complete genome that empowered an integrated genomics/proteomics/metabolomics approach, accompanied by the characterization of a characteristic enzyme of steroid side chain degradation. The results indicate that individual molybdopterin-containing steroid dehydrogenases are involved in C25-hydroxylations of steroids with different isoprenoid side chains, followed by the unusual conversion to C26-oic acids. Side chain degradation to androsta-1,4-diene-3,17-dione (ADD) via aldolytic C-C bond cleavages involves acyl-CoA synthetases/dehydrogenases specific for the respective 26-, 24- and 22-oic acids/-oyl-CoAs and promiscuous MaoC-like enoyl-CoA hydratases, aldolases and aldehyde dehydrogenases. Degradation of rings A and B depends on gene products uniquely found in anaerobic steroid degraders, which after hydrolytic cleavage of ring A, again involves CoA-ester intermediates. The degradation of the remaining CD rings via hydrolytic cleavage appears to be highly similar in aerobic and anaerobic bacteria. Anaerobic cholesterol degradation employs a composite repertoire of more than 40 genes partially known from aerobic degradation in gammaproteobacteria/actinobacteria, supplemented by unique genes that are required to circumvent oxygenase-dependent reactions.
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Affiliation(s)
- Markus Warnke
- Institute of Biology II, Microbiology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Christian Jacoby
- Institute of Biology II, Microbiology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Tobias Jung
- Institute of Biology II, Microbiology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Michael Agne
- Institute of Biology II, Microbiology, Albert-Ludwigs-University Freiburg, Freiburg, Germany.,Spemann Graduate School of Biology and Medicine (SGBM), Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Mario Mergelsberg
- Institute of Biology II, Microbiology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Robert Starke
- Department of Molecular Systems Biology, Helmholtz Centre of Environmental Sciences, Leipzig, Germany
| | - Nico Jehmlich
- Department of Molecular Systems Biology, Helmholtz Centre of Environmental Sciences, Leipzig, Germany
| | - Martin von Bergen
- Department of Molecular Systems Biology, Helmholtz Centre of Environmental Sciences, Leipzig, Germany.,Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Leipzig, Germany
| | - Hans-Hermann Richnow
- Department of Isotope Biogeochemistry, Helmholtz Centre of Environmental Sciences, Leipzig, Germany
| | - Thomas Brüls
- CEA, DRF, IG, Genoscope, Evry, France.,CNRS-UMR8030, Université d'Evry Val d'Essonne and Université Paris-Saclay, Evry, France
| | - Matthias Boll
- Institute of Biology II, Microbiology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
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9
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Brownholland DP, Covey DF. Synthesis of side-chain oxysterols and their enantiomers through cross-metathesis reactions of Δ 22 steroids. Steroids 2017; 121:22-31. [PMID: 28300584 PMCID: PMC5398201 DOI: 10.1016/j.steroids.2017.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/02/2017] [Accepted: 03/09/2017] [Indexed: 10/20/2022]
Abstract
A synthetic route that utilizes a cross-metathesis reaction with Δ22 steroids has been developed to prepare sterols with varying C-27 side-chains. Natural sterols containing hydroxyl groups at the 25 and (25R)-26 positions were prepared. Enantiomers of cholesterol and (3β,25R)-26-hydroxycholesterol (27-hydroxycholesterol) trideuterated at C-19 were prepared for future biological studies.
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Affiliation(s)
- David P Brownholland
- Department of Chemistry, Carthage College, 2001 Alford Park, Kenosha, WI 53140, USA.
| | - Douglas F Covey
- Department of Developmental Biology, Washington University in St. Louis, 660 South Euclid Avenue, St. Louis, MO 63110, USA; Department of Anesthesiology, Washington University in St. Louis, 660 South Euclid Avenue, St. Louis, MO 63110, USA; Department of Psychiatry, Washington University in St. Louis, 660 South Euclid Avenue, St. Louis, MO 63110, USA.
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10
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Wang W, Ge F, Ma C, Li J, Ren Y, Li W, Fu J. Heterologous expression and characterization of a 3-ketosteroid-∆ 1-dehydrogenase from Gordonia neofelifaecis and its utilization in the bioconversion of androst-4,9(11)-dien-3,17-dione. 3 Biotech 2017; 7:19. [PMID: 28391482 PMCID: PMC5385177 DOI: 10.1007/s13205-017-0601-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 01/02/2017] [Indexed: 01/25/2023] Open
Abstract
3-Ketosteroid-∆1-dehydrogenase (KstD), a key enzyme in microbial steroid catabolism, catalyzes the trans-axial elimination of the C1 and C2 hydrogen atoms of the A-ring from the polycyclic ring structure of 3-ketosteroids, and it was usually used to transform androst-4-ene-3,17-dione (AD) to produce androsta-1,4-diene-3,17-dione. Here, the KstD from Gordonia neofelifaecis was expressed efficiently in Escherichia coli. E. coli cells expressing KstD3gor were subjected to the investigation of dehydrogenation activity for different steroids. The results showed that KstD3gor has a clear preference for steroid substrates with 3-keto-4-ene configuration, and it exhibits higher activity towards steroid substrates carrying a small or no aliphatic side chain than towards substrates having a bulky side chain at the C-17 atom. The recombinant strain could efficiently convert androst-4,9(11)-dien-3,17-dione into androst-1,4,9(11)-trien-3,17-dione (with conversion rate of 96%). 1(2)-Dehydrogenation of androst-4,9(11)-dien-3,17-dione is one of the key steps in glucocorticoid production. To the best of our knowledge, this is the first study reporting on the conversion of androst-4,9(11)-dien-3,17-dione catalyzed by recombinant KstD; the expression system of KstD3gor reported here would have an impact in the industrial production of glucocorticoid in the future.
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11
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Ma D, Cheng H, Huang C, Xu L. Synthesis of the azatricyclic ACD ring system of calyciphylline A-type Daphniphyllum alkaloids via a nonstabilized azomethine ylide generated by desilylation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.097] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Ermolovich YV, Zhabinskii VN, Khripach VA. Formation of the steroidal C-25 chiral center via the asymmetric alkylation methodology. Org Biomol Chem 2015; 13:776-82. [PMID: 25388008 DOI: 10.1039/c4ob02123a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel approach for the preparation of steroids containing a chiral center at C-25 is reported. The key stereochemistry inducing step was asymmetric alkylation of pseudoephenamine amides of steroidal C-26 acids. The reaction proceeded with high diastereoselectivity (dr > 99 : 1). The developed methodology was successfully applied to the synthesis of (25R)- and (25S)-cholestenoic acids as well as (25R)- and (25S)-26-hydroxy brassinolides.
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Affiliation(s)
- Yu V Ermolovich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich st., 5/2, 220141 Minsk, Belarus.
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13
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Kinzurik MI, Hristov LV, Matsuda SPT, Ball ZT. Mixed Bioengineering–Chemical Synthesis Approach for the Efficient Preparation of Δ7-Dafachronic Acid. Org Lett 2014; 16:2188-91. [DOI: 10.1021/ol5006642] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matias I. Kinzurik
- Department of Chemistry and ‡Department of Biochemistry
and Cell Biology, Rice University, Houston, Texas 77005, United States
| | - Lachezar V. Hristov
- Department of Chemistry and ‡Department of Biochemistry
and Cell Biology, Rice University, Houston, Texas 77005, United States
| | - Seiichi P. T. Matsuda
- Department of Chemistry and ‡Department of Biochemistry
and Cell Biology, Rice University, Houston, Texas 77005, United States
| | - Zachary T. Ball
- Department of Chemistry and ‡Department of Biochemistry
and Cell Biology, Rice University, Houston, Texas 77005, United States
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14
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Li TM, Chen J, Li X, Ding XJ, Wu Y, Zhao LF, Chen S, Lei X, Dong MQ. Absolute Quantification of a Steroid Hormone that Regulates Development in Caenorhabditis elegans. Anal Chem 2013; 85:9281-7. [DOI: 10.1021/ac402025c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tie-Mei Li
- College of Life
Sciences, Beijing Normal University, Beijing 100875, China
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Jie Chen
- College of Pharmaceutical
Science and Technology, Tianjin University, Tianjin 300072, China
| | - Xiangke Li
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Xiao-Jun Ding
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Yao Wu
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Li-Feng Zhao
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - She Chen
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
| | - Xiaoguang Lei
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
- College of Pharmaceutical
Science and Technology, Tianjin University, Tianjin 300072, China
| | - Meng-Qiu Dong
- College of Life
Sciences, Beijing Normal University, Beijing 100875, China
- National Institute of Biological Sciences, Beijing, Beijing 102206, China
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Inhibitory effect of oxygenated cholestan-3β-ol derivatives on the growth of Mycobacterium tuberculosis. Bioorg Med Chem Lett 2013; 23:6111-3. [PMID: 24084159 DOI: 10.1016/j.bmcl.2013.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 09/02/2013] [Accepted: 09/05/2013] [Indexed: 11/22/2022]
Abstract
A variety of cholestan-3β-ol derivatives, which are oxygenated at different positions of the steroid ring system, were prepared and tested for their inhibition of the Mycobacterium tuberculosis H37Rv strain. Several compounds showed significant antitubercular activities with MIC90 values in the range 4-8 μM and low or non-detectable toxicity against mammalian cells.
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16
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Ermolovich YV, Zhabinskii VN, Khripach VA. 1,4-Chirality transfer via the ester enolate Claisen rearrangements in the preparation of (25R)- and (25S)-cholestenoic acids. Steroids 2013; 78:683-92. [PMID: 23583600 DOI: 10.1016/j.steroids.2013.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/26/2013] [Accepted: 03/27/2013] [Indexed: 10/27/2022]
Abstract
Two variants of the Claisen rearrangement were evaluated for a stereoselective construction of a C-25 stereogenic center in cholestenoic acids based on 1,4-chirality transfer. Johnson orthoester Claisen rearrangement of (22R)- and (22S)-propargyl enol ethers proceeded in a highly stereoselective manner to give (25R)- and (25S)-isomeric allenes. The stereochemical outcome of the Ireland-Claisen rearrangement of 22-allylic alcohols was dependent on the configuration of the C-22 hydroxyl group and the geometry of the enol ether. The latter could be controlled by the solvent (THF or a mixture of THF/HMPA) chosen for the generation of silyl enolate.
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Affiliation(s)
- Yurii V Ermolovich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich Str. 5/2, 220141 Minsk, Belarus
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Dieter RK, Huang Y, Guo F. Regio- and Stereoselectivity in the Reactions of Organometallic Reagents with an Electron-Deficient and an Electron-Rich Vinyloxirane: Applications for Sequential Bis-Allylic Substitution Reactions in the Generation of Vicinal Stereogenic Centers. J Org Chem 2012; 77:4949-67. [DOI: 10.1021/jo300304n] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- R. Karl Dieter
- Hunter Laboratory, Department
of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States
| | - Yaxin Huang
- Hunter Laboratory, Department
of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States
| | - Fenghai Guo
- Hunter Laboratory, Department
of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States
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18
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Saini R, Boland S, Kataeva O, Schmidt AW, Kurzchalia TV, Knölker HJ. Stereoselective synthesis and hormonal activity of novel dafachronic acids and naturally occurring steroids isolated from corals. Org Biomol Chem 2012; 10:4159-63. [PMID: 22434373 DOI: 10.1039/c2ob25394a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A stereoselective synthesis of (25S)-Δ(1)-, (25S)-Δ(1,4)-, (25S)-Δ(1,7)-, (25S)-Δ(8(14))-, (25S)-Δ(4,6,8(14))-dafachronic acid, methyl (25S)-Δ(1,4)-dafachronate and (25S)-5α-hydroxy-3,6-dioxocholest-7-en-26-oic acid is described. (25S)-Δ(1,4)-Dafachronic acid and its methyl ester are natural products isolated from corals and have been obtained by synthesis for the first time. (25S)-5α-Hydroxy-3,6-dioxocholest-7-en-26-oic acid represents a promising synthetic precursor for cytotoxic marine steroids.
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Affiliation(s)
- Ratni Saini
- Department Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
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19
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Hochbaum D, Zhang Y, Stuckenholz C, Labhart P, Alexiadis V, Martin R, Knölker HJ, Fisher AL. DAF-12 regulates a connected network of genes to ensure robust developmental decisions. PLoS Genet 2011; 7:e1002179. [PMID: 21814518 PMCID: PMC3140985 DOI: 10.1371/journal.pgen.1002179] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Accepted: 05/23/2011] [Indexed: 02/07/2023] Open
Abstract
The nuclear receptor DAF-12 has roles in normal development, the decision to pursue dauer development in unfavorable conditions, and the modulation of adult aging. Despite the biologic importance of DAF-12, target genes for this receptor are largely unknown. To identify DAF-12 targets, we performed chromatin immunoprecipitation followed by hybridization to whole-genome tiling arrays. We identified 1,175 genomic regions to be bound in vivo by DAF-12, and these regions are enriched in known DAF-12 binding motifs and act as DAF-12 response elements in transfected cells and in transgenic worms. The DAF-12 target genes near these binding sites include an extensive network of interconnected heterochronic and microRNA genes. We also identify the genes encoding components of the miRISC, which is required for the control of target genes by microRNA, as a target of DAF-12 regulation. During reproductive development, many of these target genes are misregulated in daf-12(0) mutants, but this only infrequently results in developmental phenotypes. In contrast, we and others have found that null daf-12 mutations enhance the phenotypes of many miRISC and heterochronic target genes. We also find that environmental fluctuations significantly strengthen the weak heterochronic phenotypes of null daf-12 alleles. During diapause, DAF-12 represses the expression of many heterochronic and miRISC target genes, and prior work has demonstrated that dauer formation can suppress the heterochronic phenotypes of many of these target genes in post-dauer development. Together these data are consistent with daf-12 acting to ensure developmental robustness by committing the animal to adult or dauer developmental programs despite variable internal or external conditions.
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Affiliation(s)
- Daniel Hochbaum
- Division of Geriatric Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Yue Zhang
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Carsten Stuckenholz
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Paul Labhart
- Active Motif, Carlsbad, California, United States of America
| | | | - René Martin
- ChiroBlock GmbH, Wolfen, Germany
- Department Chemie, Technische Universität Dresden, Dresden, Germany
| | | | - Alfred L. Fisher
- Division of Geriatric Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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21
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Martin R, Entchev EV, Kurzchalia TV, Knölker HJ. Steroid hormones controlling the life cycle of the nematode Caenorhabditis elegans: stereoselective synthesis and biology. Org Biomol Chem 2010; 8:739-50. [DOI: 10.1039/b918488k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Martin R, Entchev EV, Däbritz F, Kurzchalia TV, Knölker HJ. Synthesis and Hormonal Activity of the (25S)-Cholesten-26-oic Acids - Potent Ligands for the DAF-12 Receptor inCaenorhabditis elegans. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900443] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Zaed AM, Swift MD, Sutherland A. A stereoselective synthesis of (+)-physoperuvine using a tandem aza-Claisen rearrangement and ring closing metathesis reaction. Org Biomol Chem 2009; 7:2678-80. [DOI: 10.1039/b907341h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Martin R, Saini R, Bauer I, Gruner M, Kataeva O, Zagoriy V, Entchev EV, Kurzchalia TV, Knölker HJ. 4α-Bromo-5α-cholestan-3β-ol and nor-5α-cholestan-3β-ol derivatives—stereoselective synthesis and hormonal activity in Caenorhabditis elegans. Org Biomol Chem 2009; 7:2303-9. [DOI: 10.1039/b904001c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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