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Toumi M, Rincheval V, Young A, Gergeres D, Turos E, Couty F, Mignotte B, Evano G. A General Route to Cyclopeptide Alkaloids: Total Syntheses and Biological Evaluation of Paliurines E and F, Ziziphines N and Q, Abyssenine A, Mucronine E, and Analogues. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900122] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sipos A, Berényi S. Benzylation of morphinandienes and new aspects of their acid-catalyzed rearrangement to new aporphines. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.04.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Denda M, Tsutsumi M, Inoue K, Crumrine D, Feingold KR, Elias PM. Potassium channel openers accelerate epidermal barrier recovery. Br J Dermatol 2007; 157:888-93. [PMID: 17916210 DOI: 10.1111/j.1365-2133.2007.08198.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Maintenance of a competent permeability barrier in the face of external and internal stressors requires signals between the stratum corneum interface and the metabolic machinery in the underlying nucleated layers. For example, reductions in the ion gradients for Ca2+ after acute barrier disruption stimulate lamellar body (LB) secretion, a response required to restore barrier homeostasis. Although alterations in external K+ levels also regulate barrier recovery after acute insults, the mechanisms whereby K+ regulates barrier function remain unknown. OBJECTIVES To evaluate effects of regulators of K+ channels on barrier homeostasis in hairless mice. METHODS We tested a number of chemically different drugs that alter intracellular K+ levels. Results Single applications of either K+ channel openers (i.e. 1-EBIO, minoxidil, diazoxide) or the K+ ionophore, valinomycin, accelerated barrier recovery after acute insults to murine skin, paralleled by a reduction in intracellular K+ levels in cultured human keratinocytes. In contrast, applications of K+ channel blockers (i.e. gilbenclamide, dequalinium) delayed barrier recovery. Alterations in intracellular K+ regulated barrier homeostasis by either stimulating (reduced K+) or inhibiting (elevated K+) LB secretion. Finally, development of epidermal hyperplasia, a downstream consequence of barrier disruption, was also inhibited by agents that reduce intracellular K+ levels. CONCLUSIONS These results demonstrate that changes in K+ levels that can be presumed to occur after barrier disruption signal metabolic responses, i.e. LB secretion, which accelerates normalization of barrier function.
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Affiliation(s)
- M Denda
- Shiseido Research Center, 2-12-1 Fukuura, Kanazawa-ku, Yokohama 236-8643, Japan.
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Zhang A, Zhang Y, Branfman AR, Baldessarini RJ, Neumeyer JL. Advances in development of dopaminergic aporphinoids. J Med Chem 2007; 50:171-81. [PMID: 17228858 DOI: 10.1021/jm060959i] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ao Zhang
- Synthetic Organic & Medicinal Chemistry Laboratory, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
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Miyakawa M, Scanlan TS. Synthesis of [125I]‐, [2H]‐, and [3H]‐Labeled 3‐Iodothyronamine (T1AM). SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910500466074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Motonori Miyakawa
- a Departments of Pharmaceutical Chemistry and Cellular and Molecular Pharmacology , University of California at San Francisco , San Francisco, California, USA
| | - Thomas S. Scanlan
- a Departments of Pharmaceutical Chemistry and Cellular and Molecular Pharmacology , University of California at San Francisco , San Francisco, California, USA
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Wängler B, Beck C, Shiue CY, Schneider S, Schwanstecher C, Schwanstecher M, Feilen PJ, Alavi A, Rösch F, Schirrmacher R. Synthesis and in vitro evaluation of (S)-2-([11C]methoxy)-4-[3-methyl-1-(2-piperidine-1-yl-phenyl)-butyl-carbamoyl]-benzoic acid ([11C]methoxy-repaglinide): a potential beta-cell imaging agent. Bioorg Med Chem Lett 2005; 14:5205-9. [PMID: 15380228 DOI: 10.1016/j.bmcl.2004.07.059] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2004] [Revised: 07/01/2004] [Accepted: 07/22/2004] [Indexed: 11/28/2022]
Abstract
The 11C-labeled sulfonylurea receptor 1 (SUR1) ligand (S)-2-([11C]methoxy)-4-[3-methyl-1-(2-piperidine-1-yl-phenyl)-butyl-carbamoyl]-benzoic acid ([11C]methoxy-repaglinide) was synthesized in an overall radiochemical yield of 35% after 55 min with a radiochemical purity higher than 99%. This compound is considered for the noninvasive investigation of the SUR1 receptor status of pancreatic beta-cells by positron emission tomography (PET) in the context of type 1 and type 2 diabetes. The specific activity was 40-70 GBq/micromol. In vitro testing of the nonradioactive methoxy-repaglinide was performed to characterize the affinity for binding to the human SUR1 isoform. Methoxy-repaglinide induced a complete monophasic inhibition curve with a Hill coefficient close to 1 (1.03) yielding a dissociation constant (KD) of 83 nM and an IC50 of 163 nM. Insulin secretion experiments on isolated rat islets were performed to prove biological activity, which was determined to be in the same range as that of original repaglinide.
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Affiliation(s)
- Björn Wängler
- Institute of Nuclear Chemistry, University of Mainz, Mainz, Germany
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Wängler B, Schneider S, Thews O, Schirrmacher E, Comagic S, Feilen P, Schwanstecher C, Schwanstecher M, Shiue CY, Alavi A, Höhnemann S, Piel M, Rösch F, Schirrmacher R. Synthesis and evaluation of (S)-2-(2-[18F]fluoroethoxy)-4-([3-methyl-1-(2-piperidin-1-yl-phenyl)-butyl-carbamoyl]-methyl)-benzoic acid ([18F]repaglinide): a promising radioligand for quantification of pancreatic beta-cell mass with positron emission tomography (PET). Nucl Med Biol 2004; 31:639-47. [PMID: 15219283 DOI: 10.1016/j.nucmedbio.2004.01.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2004] [Revised: 01/25/2004] [Accepted: 01/25/2004] [Indexed: 11/20/2022]
Abstract
18F-labeled non-sulfonylurea hypoglycemic agent (S)-2-(2-[(18)F]fluoroethoxy)-4-((3-methyl-1-(2-piperidin-1-yl-phenyl)-butylcarbamoyl)-methyl)-benzoic acid ([(18)F]repaglinide), a derivative of the sulfonylurea-receptor (SUR) ligand repaglinide, was synthesized as a potential tracer for the non-invasive investigation of the sulfonylurea 1 receptor status of pancreatic beta-cells by positron emission tomography (PET) in the context of type 1 and type 2 diabetes. [(18)F]Repaglinide could be obtained in an overall radiochemical yield (RCY) of 20% after 135 min with a radiochemical purity higher than 98% applying the secondary labeling precursor 2-[(18)F]fluoroethyltosylate. Specific activity was in the range of 50-60 GBq/micromol. Labeling was conducted by exchanging the ethoxy-moiety into a 2-[(18)F]fluoroethoxy group. To characterize the properties of fluorinated repaglinide, the affinity of the analogous non-radioactive (19)F-compound for binding to the human SUR1 isoform was assessed. [(19)F]Repaglinide induced a complete monophasic inhibition curve with a Hill coefficient close to 1 (1.03) yielding a dissociation constant (K(D)) of 134 nM. Biological activity was proven via insulin secretion experiments on isolated rat islets and was comparable to that of repaglinide. Finally, biodistribution of [(18)F]repaglinide was investigated in rats by measuring the concentration of the compound in different organs after i.v. injection. Pancreatic tissue displayed a stable accumulation of approximately 0.12% of the injected dose from 10 min to 30 min p.i. 50% of the radioactive tracer could be displaced by additional injection of unlabeled repaglinide, indicating that [(18)F]repaglinide might be suitable for in vivo investigation with PET.
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Affiliation(s)
- B Wängler
- Institute of Nuclear Chemistry, Johannes Gutenberg-University of Mainz, Fritz Strassmann-Weg 2, D-55128 Mainz, Germany
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Linnanen T, Brisander M, Unelius L, Sundholm G, Hacksell U, Johansson AM. Derivatives of (R)-1,11-methyleneaporphine: synthesis, structure, and interactions with G-protein coupled receptors. J Med Chem 2000; 43:1339-49. [PMID: 10753471 DOI: 10.1021/jm9911433] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The design and synthesis of a well-characterized novel ring system, (R)-lambda1,11-methyleneaporphine [(R)-4], and 15 derivatives thereof are presented. The addition of various nucleophiles to (R)-lambda1,11-carbonylaporphine [(R)-11] or to the 1,11-hydroxymethyleneaporphine epimers gave separable mixtures of epimers. The epimeric ratios obtained in most reactions seem to be a result of steric factors directing the nucleophilic attack. The structure of the epimers was determined by a combination of X-ray crystallography (5 derivatives), NMR spectroscopy, and chemical correlation. Interesting and diverse pharmacological profiles of the derivatives were revealed through binding studies at serotonin 5-HT(7) and 5-HT(1A) receptors as well as at dopamine D(2A) receptors. Two derivatives appeared to be selective 5-HT(7) receptor antagonists. It is evident from our results that the novel ring system [(R)-4] provides a useful complement to other scaffolds available to medicinal chemists involved in studies of GPC receptors.
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Affiliation(s)
- T Linnanen
- Organic Pharmaceutical Chemistry, Uppsala University, Uppsala Biomedical Center, Box 574, SE-751 23 Uppsala, Sweden
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Giannaccini G, Lupi R, Trincavelli ML, Navalesi R, Betti L, Marchetti P, Lucacchini A, Del Guerra S, Martini C. Characterization of sulfonylurea receptors in isolated human pancreatic islets. J Cell Biochem 1998; 71:182-8. [PMID: 9779817 DOI: 10.1002/(sici)1097-4644(19981101)71:2<182::aid-jcb4>3.0.co;2-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Current information on pancreatic islet sulfonylurea receptors has been obtained with laboratory animal pancreatic beta cells or stable beta-cell lines. In the present study, we evaluated the properties of sulfonylurea receptors of human islets of Langherans, prepared by collagenase digestion and density-gradient purification. The binding characteristics of labeled glibenclamide to pancreatic islet membrane preparations were analyzed, displacement studies with several oral hypoglycemic agents were performed, and these latter compounds were tested as for their insulinotropic action on intact human islets. [3H]glibenclamide saturable binding was shown to be linear at < or =0.25 mg/ml protein; it was both temperature and time dependent. Scatchard analysis of the equilibrium binding data at 25 degrees C indicated the presence of a single class of saturable, high-affinity binding sites with a Kd value of 1.0+/-0.07 nM and a Bmax value of 657+/-48 fmol/mg of proteins. The displacement experiments showed the following rank order of potency of the oral hypoglycemic agents we tested: glibenclamide = glimepiride > tolbutamide > chlorpropamide >> metformin. This binding potency order was parallel with the insulinotropic potency of the evaluated compounds.
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Affiliation(s)
- G Giannaccini
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia e Biotecnologie, Pisa, Italy
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Jones RB, Dickinson K, Anthony DM, Marita AR, Kaul CL, Buckett WR. Evaluation of BTS 67 582, a novel antidiabetic agent, in normal and diabetic rats. Br J Pharmacol 1997; 120:1135-43. [PMID: 9134227 PMCID: PMC1564577 DOI: 10.1038/sj.bjp.0701019] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
1. The effect of BTS 67 582, a novel antidiabetic agent, has been evaluated on plasma glucose and plasma insulin in normal and streptozotocin-induced diabetic rats. 2. BTS 67 582 (3 to 300 mg kg-1, p.o.) caused a dose- and time-dependent reduction in plasma glucose and an increase in plasma insulin in both fasted and glucose-loaded normal rats. The ED50 for the glucose lowering effect of BTS 67 582 in fasted rats was 37.6, 18.4 and 18.5 mg kg-1 at 1, 2 and 4 h after administration respectively. 3. In streptozotocin-induced (50 mg kg-1, i.v.) diabetic rats, BTS 67 582 (37-147 mg kg-1, p.o.) caused significant reductions of plasma glucose following a glucose load, whereas glibenclamide (100 mg kg-1, p.o.) was ineffective. BTS 67 582 significantly increased plasma insulin compared to controls whereas glibenclamide did not. 4. BTS 67 582 did not displace [3H]-glibenclamide from its binding sites in rat brain, guinea-pig ventricle or the HIT-T15 insulinoma beta-cell line. BTS 67 582 does not therefore appear to modulate its action via an effect on the 'sulphonylurea' receptor. 5. In fasted rats, the glucose lowering effect of BTS 67 582 (100 mg kg-1 p.o.) and glibenclamide (1 mg kg-1, p.o.) were antagonized by diazoxide (30 mg kg-1, i.p.). In addition BTS 67 582, like glibenclamide, caused a dose-dependent rightward shift of cromakalim-induced relaxation of noradrenaline precontracted rat aortic strips, suggesting the involvement of KATP channels. 6. In summary, BTS 67 582 produces a blood glucose-lowering effect in normal and streptozotocin-induced diabetic rats associated with increased insulin concentrations. This effect appears to be due to a blockade of ATP-sensitive potassium channel activity via a different binding site to that of glibenclamide.
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MESH Headings
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/physiology
- Benzopyrans/pharmacology
- Blood Glucose/analysis
- Brain/metabolism
- Cromakalim
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/drug therapy
- Diazoxide/pharmacology
- Glucose/metabolism
- Glyburide/metabolism
- Guanidines/metabolism
- Guanidines/pharmacology
- Hypoglycemic Agents/pharmacology
- In Vitro Techniques
- Insulin/blood
- Male
- Muscle Relaxation/drug effects
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- Potassium Channel Blockers
- Pyrroles/pharmacology
- Rats
- Rats, Wistar
- Tumor Cells, Cultured/metabolism
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Affiliation(s)
- R B Jones
- Knoll Pharmaceuticals, Research and Development, Nottingham
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Berényi S, Sepsi Á, Gyulai S, Szilágyi L. Synthesis of Sulfur-Containing Morphinane Dienes. SYNTHETIC COMMUN 1995. [DOI: 10.1080/00397919508013849] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Gopalakrishnan M, Janis RA, Triggle DJ. ATP-sensitive K+ channels: Pharmacologic properties, regulation, and therapeutic potential. Drug Dev Res 1993. [DOI: 10.1002/ddr.430280202] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gehlert DR, Gackenheimer SL. Comparison of the distribution of binding sites for the potassium channel ligands [125I]apamin, [125I]charybdotoxin and [125I]iodoglyburide in the rat brain. Neuroscience 1993; 52:191-205. [PMID: 7679479 DOI: 10.1016/0306-4522(93)90192-i] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Potassium channels represent a diverse and promising target for drug development. Pharmacological subtypes of K channels have begun to emerge based on the development of both organic molecules and peptide toxins which possess subtype selectivity. In order to evaluate the neuroanatomical distribution of these subtypes we have utilized the ligands [125I]apamin, [125I]charybdotoxin and [125I]iodoglyburide in an autoradiographic study of rat brain. In the rat brain, these ligands have selectivity for the low conductance Ca(2+)-activated, voltage-gated K channels and ATP-sensitive K channels respectively. The distribution of binding sites for these three ligands were distinctly different. [125I]Apamin binding was highest in various thalamic and hippocampal structures, while only low to moderate levels of [125I]charybdotoxin binding were seen in these regions. In contrast, very high levels of [125I]charbydotoxin were seen in white matter regions such as the lateral olfactory tract and fasciculus retroflexus. High levels of [125I]charybdotoxin binding were also seen in gray matter-containing regions such as the zona incerta, medial geniculate and superior colliculus, where low to moderate [125I]apamin binding was found. [125I]Iodoglyburide presented a more uniform binding with the highest levels in the globus pallidus, islands of Calleja, anteroventral nucleus of the thalamus and zonas reticulata of the substantia nigra. These results indicate that subtypes of K channels have very different distributions in the brain. As such, the results imply differing CNS actions for potential modulators of K channel subtypes.
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Affiliation(s)
- D R Gehlert
- Central Nervous System Research, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285
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Berényi S, Czirják M, Makleit S. Rearrangement of morphinandienes in methanesulfonic acid. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/p19930002137] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- S J Ashcroft
- Nuffield Department of Clinical Biochemistry, University of Oxford, UK
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Specificity of photolabeling of beta-cell membrane proteins with an 125I-labeled glyburide analog. J Biol Chem 1992. [DOI: 10.1016/s0021-9258(18)42129-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Berényi S, Hosztafi S, Makleit S. A new efficient method for the preparation of 2-fluoro-N-propylnorapomorphine. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920002693] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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