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Cosyn L, Van Calenbergh S, Joshi BV, Ko H, Carter RL, Kendall Harden T, Jacobson KA. Synthesis and P2Y receptor activity of nucleoside 5'-phosphonate derivatives. Bioorg Med Chem Lett 2009; 19:3002-5. [PMID: 19419868 PMCID: PMC2721324 DOI: 10.1016/j.bmcl.2009.04.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 04/08/2009] [Accepted: 04/09/2009] [Indexed: 10/20/2022]
Abstract
Ribose-based nucleoside 5'-diphosphates and triphosphates and related nucleotides were compared in their potency at the P2Y receptors with the corresponding nucleoside 5'-phosphonate derivatives. Phosphonate derivatives of UTP and ATP activated the P2Y(2) receptor but were inactive or weakly active at P2Y(4) receptor. Uridine 5'-(diphospho)phosphonate was approximately as potent at the P2Y(2) receptor as at the UDP-activated P2Y(6) receptor. These results suggest that removal of the 5'-oxygen atom from nucleotide agonist derivatives reduces but does not prevent interaction with the P2Y(2) receptor. Uridine 5'-(phospho)phosphonate as well as the 5'-methylenephosphonate equivalent of UMP were inactive at the P2Y(4) receptor and exhibited maximal effects at the P2Y(2) receptor that were 50% of that of UTP suggesting novel action of these analogues.
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Affiliation(s)
- Liesbet Cosyn
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences (FFW), Ghent University, Ghent, Belgium
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Ko H, Carter RL, Cosyn L, Petrelli R, de Castro S, Besada P, Zhou Y, Cappellacci L, Franchetti P, Grifantini M, Van Calenbergh S, Harden TK, Jacobson KA. Synthesis and potency of novel uracil nucleotides and derivatives as P2Y2 and P2Y6 receptor agonists. Bioorg Med Chem 2008; 16:6319-32. [PMID: 18514530 PMCID: PMC2483329 DOI: 10.1016/j.bmc.2008.05.013] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2008] [Revised: 05/02/2008] [Accepted: 05/05/2008] [Indexed: 10/22/2022]
Abstract
The phosphate, uracil, and ribose moieties of uracil nucleotides were varied structurally for evaluation of agonist activity at the human P2Y(2), P2Y(4), and P2Y(6) receptors. The 2-thio modification, found previously to enhance P2Y(2) receptor potency, could be combined with other favorable modifications to produce novel molecules that exhibit high potencies and receptor selectivities. Phosphonomethylene bridges introduced for stability in analogues of UDP, UTP, and uracil dinucleotides markedly reduced potency. Truncation of dinucleotide agonists of the P2Y(2) receptor, in the form of Up(4)-sugars, indicated that a terminal uracil ring is not essential for moderate potency at this receptor and that specific SAR patterns are observed at this distal end of the molecule. Key compounds reported in this study include 9, alpha,beta-methylene-UDP, a P2Y(6) receptor agonist; 30, Up(4)-phenyl ester and 34, Up(4)-[1]glucose, selective P2Y(2) receptor agonists; dihalomethylene phosphonate analogues 16 and 41, selective P2Y(2) receptor agonists; 43, the 2-thio analogue of INS37217 (P(1)-(uridine-5')-P(4)-(2'-deoxycytidine-5')tetraphosphate), a potent and selective P2Y(2) receptor agonist.
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Affiliation(s)
- Hyojin Ko
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, NIDDK, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892-0810, USA
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Ivanov AA, Ko H, Cosyn L, Maddileti S, Besada P, Fricks I, Costanzi S, Harden TK, Van Calenbergh S, Jacobson KA. Molecular modeling of the human P2Y2 receptor and design of a selective agonist, 2'-amino-2'-deoxy-2-thiouridine 5'-triphosphate. J Med Chem 2007; 50:1166-76. [PMID: 17302398 PMCID: PMC3404812 DOI: 10.1021/jm060903o] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A rhodopsin-based homology model of the nucleotide-activated human P2Y2 receptor, including loops, termini, and phospholipids, was optimized with the Monte Carlo multiple minimum conformational search routine. Docked uridine 5'-triphosphate (UTP) formed a nucleobase pi-pi complex with conserved Phe3.32. Selectivity-enhancing 2'-amino-2'-deoxy substitution interacted through pi-hydrogen-bonding with aromatic Phe6.51 and Tyr3.33. A "sequential ligand composition" approach for docking the flexible dinucleotide agonist Up4U demonstrated a shift of conserved cationic Arg3.29 from the UTP gamma position to the delta position of Up4U and Up4 ribose. Synthesized nucleotides were tested as agonists at human P2Y receptors expressed in 1321N1 astrocytoma cells. 2'-Amino and 2-thio modifications were synergized to enhance potency and selectivity; compound 8 (EC50 = 8 nM) was 300-fold P2Y2-selective versus P2Y4. 2'-Amine acetylation reduced potency, and trifluoroacetylation produced intermediate potency. 5-Amino nucleobase substitution did not enhance P2Y2 potency through a predicted hydrophilic interaction possibly because of destabilization of the receptor-favored Northern conformation of ribose. This detailed view of P2Y2 receptor recognition suggests mutations for model validation.
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Affiliation(s)
- Andrei A. Ivanov
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Hyojin Ko
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Liesbet Cosyn
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences (FFW), Ghent University, Harelbekestraat 72, B-9000 Ghent, Belgium
| | - Savitri Maddileti
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Pedro Besada
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Ingrid Fricks
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Stefano Costanzi
- Laboratory of Biological Modeling, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - T. Kendall Harden
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Serge Van Calenbergh
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences (FFW), Ghent University, Harelbekestraat 72, B-9000 Ghent, Belgium
| | - Kenneth A. Jacobson
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
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Cosyn L, Palaniappan KK, Kim SK, Duong HT, Gao ZG, Jacobson KA, Van Calenbergh S. 2-triazole-substituted adenosines: a new class of selective A3 adenosine receptor agonists, partial agonists, and antagonists. J Med Chem 2006; 49:7373-83. [PMID: 17149867 PMCID: PMC4968940 DOI: 10.1021/jm0608208] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
"Click chemistry" was explored to synthesize two series of 2-(1,2,3-triazolyl)adenosine derivatives (1-14). Binding affinity at the human A(1), A(2A), and A(3)ARs (adenosine receptors) and relative efficacy at the A(3)AR were determined. Some triazol-1-yl analogues showed A(3)AR affinity in the low nanomolar range, a high ratio of A(3)/A(2A) selectivity, and a moderate-to-high A(3)/A(1) ratio. The 1,2,3-triazol-4-yl regiomers typically showed decreased A(3)AR affinity. Sterically demanding groups at the adenine C2 position tended to reduce relative A(3)AR efficacy. Thus, several 5'-OH derivatives appeared to be selective A(3)AR antagonists, i.e., 10, with 260-fold binding selectivity in comparison to the A(1)AR and displaying a characteristic docking mode in an A(3)AR model. The corresponding 5'-ethyluronamide analogues generally showed increased A(3)AR affinity and behaved as full agonists, i.e., 17, with 910-fold A(3)/A(1) selectivity. Thus, N(6)-substituted 2-(1,2,3-triazolyl)adenosine analogues constitute a novel class of highly potent and selective nucleoside-based A(3)AR antagonists, partial agonists, and agonists.
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Affiliation(s)
| | | | | | | | | | - Kenneth A. Jacobson
- To whom correspondence should be addressed. For K.A.J.: phone, 301-496-9024; fax, 301-480-8422; . For S.V.C.: phone, +32(0)9 264 81 24; fax, +32(0)9 264 81 46;
| | - Serge Van Calenbergh
- To whom correspondence should be addressed. For K.A.J.: phone, 301-496-9024; fax, 301-480-8422; . For S.V.C.: phone, +32(0)9 264 81 24; fax, +32(0)9 264 81 46;
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Cosyn L, Gao ZG, Van Rompaey P, Lu C, Jacobson KA, Van Calenbergh S. Synthesis of hypermodified adenosine derivatives as selective adenosine A3 receptor ligands. Bioorg Med Chem 2006; 14:1403-12. [PMID: 16266807 PMCID: PMC8611933 DOI: 10.1016/j.bmc.2005.09.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2005] [Revised: 09/21/2005] [Accepted: 09/27/2005] [Indexed: 11/28/2022]
Abstract
We investigated the A(3)AR affinity and selectivity of a series of 2-substituted 3'-azido and 3'-amino adenosine derivatives as well as some 5'-uronamide derivatives thereof. All compounds showed high A(3)AR selectivity. While the 3'-azides appeared to be A(3)AR antagonists with moderate A(3)AR affinity, their 3'-amino congeners exhibit significantly improved A(3)AR affinity and behave as partial agonists. For both the 3'-azides and the 3'-amines, the 5'-methylcarbamoyl modification improved the overall affinity. Introduction of a 2-phenylethynyl substituent provided high affinity for the A(3)AR.
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Affiliation(s)
- Liesbet Cosyn
- Laboratory for Medicinal Chemistry (FFW), UGent, Harelbekestraat 72, B-9000, Belgium
| | - Zhan-Guo Gao
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health (NIH), DHHS, Bldg. 8A, Rm. B1 A-19, NIH, NIDDK, LBC, Bethesda, MD 20892-0810, USA
| | - Philippe Van Rompaey
- Laboratory for Medicinal Chemistry (FFW), UGent, Harelbekestraat 72, B-9000, Belgium
| | - Changrui Lu
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health (NIH), DHHS, Bldg. 8A, Rm. B1 A-19, NIH, NIDDK, LBC, Bethesda, MD 20892-0810, USA
| | - Kenneth A. Jacobson
- Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health (NIH), DHHS, Bldg. 8A, Rm. B1 A-19, NIH, NIDDK, LBC, Bethesda, MD 20892-0810, USA
| | - Serge Van Calenbergh
- Laboratory for Medicinal Chemistry (FFW), UGent, Harelbekestraat 72, B-9000, Belgium
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Elseviers MM, De Schepper A, Corthouts R, Bosmans JL, Cosyn L, Lins RL, Lornoy W, Matthys E, Roose R, Van Caesbroeck D. High diagnostic performance of CT scan for analgesic nephropathy in patients with incipient to severe renal failure. Kidney Int 1995; 48:1316-23. [PMID: 8569094 DOI: 10.1038/ki.1995.416] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Recently, well performing diagnostic criteria for analgesic nephropathy in end-stage renal failure (ESRF) patients were defined by the demonstration of a bilateral decrease in renal volume combined with either bumpy contours or papillary calcifications. In this study, the diagnostic value of computed tomography (CT) scan was compared to the previously used renal imaging techniques (sonography and conventional tomography). In a first study, a cohort of 40 analgesic abusers (defined as daily use of analgesic mixtures during at least 5 years) and 40 controls, all ESRF patients without a clear renal diagnosis, were investigated with sonography, tomography and CT scan without injection of iodinated contrast material, to search for the imaging signs of analgesic nephropathy. Using CT scan, sonography and tomography, renal size could be evaluated with comparable results while CT scan was superior in the detection of papillary calcifications (sensitivity 87%, specificity 97%). In a second controlled study of 53 analgesic abusers with a serum creatinine between 1.5 to 4 mg/dl in the absence of a clear renal diagnosis, a CT scan was performed and scored for the presence of decreased renal volume, bumpy contours and papillary calcifications. It was found that the renal image of analgesic nephropathy on CT scan in an early stage of renal failure is comparable with the observations made in ESRF patients. Particularly the demonstration of papillary calcifications showed a high sensitivity of 92% with a specificity of 100% for the early diagnosis of analgesic nephropathy.
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Affiliation(s)
- M M Elseviers
- Department of Nephrology, Universitair Ziekenhuis Antwerpen, Belgium
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