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Maciejczyk M, Lasota A, Frączak O, Kosson P, Misicka A, Nowakowski M, Ejchart A, Olma A. The impact of β-azido(or 1-piperidinyl)methylamino acids in position 2 or 3 on biological activity and conformation of dermorphin analogues. J Pept Sci 2016; 22:545-51. [DOI: 10.1002/psc.2903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 05/30/2016] [Accepted: 06/06/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Maciej Maciejczyk
- Department of Physics and Biophysics, Faculty of Food Science; University of Warmia and Mazury; Oczapowskiego 4 10-719 Olsztyn Poland
- Laboratory of Bioinformatics and Protein Engineering; International Institute of Molecular and Cell Biology in Warsaw; ul. Ks. Trojdena 4 02-109 Warsaw Poland
| | - Anika Lasota
- Institute of Organic Chemistry; Lodz University of Technology; Żeromskiego 116 90-924 Lodz Poland
| | - Oliwia Frączak
- Institute of Organic Chemistry; Lodz University of Technology; Żeromskiego 116 90-924 Lodz Poland
| | - Piotr Kosson
- Mossakowski Medical Research Centre; Polish Academy of Sciences; Pawińskiego 5 01-793 Warsaw Poland
| | - Aleksandra Misicka
- Mossakowski Medical Research Centre; Polish Academy of Sciences; Pawińskiego 5 01-793 Warsaw Poland
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Michał Nowakowski
- Centre of New Technologies; University of Warsaw; Banacha 2C 02-097 Warsaw Poland
| | - Andrzej Ejchart
- Institute of Biochemistry and Biophysics; Polish Academy of Sciences; Pawińskiego 5A 02-106 Warsaw Poland
| | - Aleksandra Olma
- Institute of Organic Chemistry; Lodz University of Technology; Żeromskiego 116 90-924 Lodz Poland
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2
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Frączak O, Lasota A, Tymecka D, Kosson P, Muchowska A, Misicka A, Olma A. Synthesis, binding affinities and metabolic stability of dimeric dermorphin analogs modified withβ3-homo-amino acids. J Pept Sci 2016; 22:222-7. [DOI: 10.1002/psc.2869] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 02/09/2016] [Accepted: 02/09/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Oliwia Frączak
- Institute of Organic Chemistry; Lodz University of Technology; Zeromskiego 116 90-924 Lodz Poland
| | - Anika Lasota
- Institute of Organic Chemistry; Lodz University of Technology; Zeromskiego 116 90-924 Lodz Poland
| | - Dagmara Tymecka
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Piotr Kosson
- Mossakowski Medical Research Centre; Polish Academy of Sciences; Pawinskiego 5 01-793 Warsaw Poland
| | - Adriana Muchowska
- Mossakowski Medical Research Centre; Polish Academy of Sciences; Pawinskiego 5 01-793 Warsaw Poland
| | - Aleksandra Misicka
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
- Mossakowski Medical Research Centre; Polish Academy of Sciences; Pawinskiego 5 01-793 Warsaw Poland
| | - Aleksandra Olma
- Institute of Organic Chemistry; Lodz University of Technology; Zeromskiego 116 90-924 Lodz Poland
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Abstract
INTRODUCTION Although endomorphins-1 (EM-1; H-Tyr-Pro-Phe-Trp-NH(2)) and -2 (EM-2; H-Tyr-Pro-Phe-Phe-NH(2)) are primarily considered agonists for the μ-opioid receptor (MOR), systematic alterations to specific residues provided antagonists and ligands with mixed μ/δ-opioid properties, suitable for application to health-related topics. While the application of endomorphins as antinociceptive agents and numerous biological endpoints were experimentally delineated in laboratory animals and in vitro, clinical use is currently absent. However, structural alterations provide enhanced stability; formation of MOR antagonists or mixed and dual μ/δ-acting ligands could find considerable therapeutic potential. AREAS COVERED This review attempts to succinctly provide insight on the development and bioactivity of endomorphin analogues during the past decade. Rational design approaches will focus on the engineering of endomorphin agonists, antagonists and mixed ligands for their application as a multi-target ligand. EXPERT OPINION Aside from alleviating pain, EM analogues open new horizons in the treatment of medical syndromes involving neural reward mechanisms and extraneural regulation effects on homeostasis. Highly selective MOR antagonists may be promising to reduce inflammation, attenuate addiction to drugs and excess consumption of high-caloric food, ameliorate alcoholism, affect the immune system and combat opioid bowel dysfunction.
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Affiliation(s)
- Lawrence H Lazarus
- National Institute of Environmental Health Sciences, Laboratory of Toxicology and Pharmacology, 111 South TW Alexander Drive, Research Triangle Park, NC 27709, USA.
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4
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Ballet S, Marczak ED, Feytens D, Salvadori S, Sasaki Y, Abell AD, Lazarus LH, Balboni G, Tourwé D. Novel multiple opioid ligands based on 4-aminobenzazepinone (Aba), azepinoindole (Aia) and tetrahydroisoquinoline (Tic) scaffolds. Bioorg Med Chem Lett 2010; 20:1610-3. [PMID: 20137938 DOI: 10.1016/j.bmcl.2010.01.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Revised: 01/12/2010] [Accepted: 01/13/2010] [Indexed: 10/19/2022]
Abstract
The dimerization and trimerization of the Dmt-Tic, Dmt-Aia and Dmt-Aba pharmacophores provided multiple ligands which were evaluated in vitro for opioid receptor binding and functional activity. Whereas the Tic- and Aba multimers proved to be dual and balanced delta/mu antagonists, as determined by the functional [S(35)]GTPgammaS binding assay, the dimerization of potent Aia-based 'parent' ligands unexpectedly resulted in substantial less efficient receptor binding and non-active dimeric compounds.
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Affiliation(s)
- Steven Ballet
- Department of Organic Chemistry, Vrije Universiteit Brussel, B-1050 Brussels, Belgium.
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5
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Salvadori S, Guerrini R, Borea PA, Tomatis R. Synthesis and pharmacological activity of the N-terminal dermorphin tetrapeptide analogs with CH2-NH peptide bond isosteres. ACTA ACUST UNITED AC 2009; 40:437-44. [PMID: 1362392 DOI: 10.1111/j.1399-3011.1992.tb00322.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of pseudotetrapeptides H-Tyr-D-Ala-Phe-NH-(CH2)2--NH2 (1a), H-Tyr-D-Ala-Phe-psi (CH2--NH)-Gly-NH2 (2a), H-Tyr-D-Ala-psi (CH2--NH)-Phe-Gly-NH2 (3a), and H-Tyr-psi (CH2--NH)-D-Ala-Phe-Gly-NH2 (4a), representing the N-terminal tetrapeptide sequence of dermorphin, in which amide bonds are replaced by CH2--NH bond, is described. N-acetyl-Tyr and desamino-Tyr pseudopeptide analogs (1-4b), (1-3c) are also described. The analogs were assayed in binding studies based on displacement of mu and delta-receptor selective radiolabels from rat brain membrane and in a bioassay using guinea pig ileum (GPI). Pseudopeptides in which the C-terminal (1a) or D-Ala-Phe (3a) amide bond are substituted, exhibit higher mu-affinities and mu-receptor selectivity than the corresponding Phe-Gly or Tyr-D-Ala analogs (2a, 4a). Acetyl-and desamino-Tyr pseudopeptide analogs (1-4b) and (1-3c) did not exhibit mu and delta-opioid receptor affinity at nM concentration. The relevance of the single peptide replacement and of its association to acetylation or amino group elimination of Tyr, is discussed on the basis of a receptor model for mu and delta opioids.
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Affiliation(s)
- S Salvadori
- Department of Pharmaceutical Science, University of Ferrara, Italy
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6
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7
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Salvadori S, Trapella C, Fiorini S, Negri L, Lattanzi R, Bryant SD, Jinsmaa Y, Lazarus LH, Balboni G. A new opioid designed multiple ligand derived from the micro opioid agonist endomorphin-2 and the delta opioid antagonist pharmacophore Dmt-Tic. Bioorg Med Chem 2007; 15:6876-81. [PMID: 17851080 PMCID: PMC2084217 DOI: 10.1016/j.bmc.2007.08.047] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2007] [Revised: 08/09/2007] [Accepted: 08/17/2007] [Indexed: 11/29/2022]
Abstract
Opioid compounds with mixed micro agonist/delta antagonist properties could be used as analgesics with low propensity to induce tolerance and dependence. Here we report the synthesis of a new designed multiple ligand deriving from the micro selective agonist endomorphin-2 and the delta selective antagonist pharmacophore Dmt-Tic. As predicted, the resulting bivalent ligand showed a micro agonist/delta antagonist profile deriving from the corresponding activities of each pharmacophore.
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Affiliation(s)
- Severo Salvadori
- Department of Pharmaceutical Science and Biotechnology Center, University of Ferrara, I-44100 Ferrara, Italy
| | - Claudio Trapella
- Department of Pharmaceutical Science and Biotechnology Center, University of Ferrara, I-44100 Ferrara, Italy
| | - Stella Fiorini
- Department of Pharmaceutical Science and Biotechnology Center, University of Ferrara, I-44100 Ferrara, Italy
| | - Lucia Negri
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University La Sapienza, I-00185 Rome, Italy
| | - Roberta Lattanzi
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University La Sapienza, I-00185 Rome, Italy
| | - Sharon D. Bryant
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Yunden Jinsmaa
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Lawrence H. Lazarus
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Gianfranco Balboni
- Department of Pharmaceutical Science and Biotechnology Center, University of Ferrara, I-44100 Ferrara, Italy
- Department of Toxicology, University of Cagliari, I-09126 Cagliari, Italy
- *Corresponding author. Tel.: +39-532-291-275; fax: +39-532-291-296; e-mail address: ;
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8
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Lu J, Jeon E, Lee BS, Onyuksel H, Wang ZJ. Targeted drug delivery crossing cytoplasmic membranes of intended cells via ligand-grafted sterically stabilized liposomes. J Control Release 2005; 110:505-13. [PMID: 16356575 DOI: 10.1016/j.jconrel.2005.10.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2005] [Revised: 10/19/2005] [Accepted: 10/25/2005] [Indexed: 11/15/2022]
Abstract
In this study, we tested whether sterically stabilized liposomes (SSL) with surface ligands specific for the mu opioid receptor (MOR) can actively target MOR-expressing cells. Dermorphin, a selective MOR agonist, was conjugated to DSPE-PEG(3400) to obtain DSPE-PEG(3400)-dermorphin. Dermorphin-grafted SSL (dermorphin-SSL) was prepared by thin-film rehydration-extrusion and post-insertion method. DSPE-PEG(3400)-dermorphin and dermorphin-SSL retained the affinity to MOR as determined by receptor binding assay using [(3)H]DAMGO, whereas plain SSL without surface ligands showed no binding to the receptor. Cellular uptake of cholesteryl BODIPY encapsulated dermorphin-SSL was studied by microplate spectrofluorometry as well as fluorescent and confocal microscopy. Significant fluorescence signal was observed inside CHO-hMOR cells after the treatment with dermorphin-SSL, indicative of MOR-mediated endocytosis. In contrast, no uptake of dermorphin-SSL was found in naive CHO cells or CHO-hDOR cells that lack MOR. Taken together, these results demonstrate that dermorphin-SSL delivery system is capable of targeting intracellular components of MOR-expressing cells. Such a system may be applied to carry pharmaceutical agents to achieve region-specific delivery of analgesics and/or to attenuate side effects associated with opioids.
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Affiliation(s)
- Jian Lu
- Department of Biopharmaceutical Sciences, College of Pharmacy, University of Illinois, Chicago, IL 60612-7231, USA
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9
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Li T, Shiotani K, Miyazaki A, Fujita Y, Tsuda Y, Ambo A, Sasaki Y, Jinsmaa Y, Marczak E, Bryant SD, Lazarus LH, Okada Y. New series of potent delta-opioid antagonists containing the H-Dmt-Tic-NH-hexyl-NH-R motif. Bioorg Med Chem Lett 2005; 15:5517-20. [PMID: 16183273 DOI: 10.1016/j.bmcl.2005.08.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2005] [Revised: 08/20/2005] [Accepted: 08/26/2005] [Indexed: 11/20/2022]
Abstract
Heterodimeric compounds H-Dmt-Tic-NH-hexyl-NH-R (R=Dmt, Tic, and Phe) exhibited high affinity to delta- (K(i)delta=0.13-0.89nM) and mu-opioid receptors (K(i)mu=0.38-2.81nM) with extraordinary potent delta antagonism (pA(2)=10.2-10.4). These compounds represent the prototype for a new class of structural homologues lacking mu-opioid receptor-associated agonism (IC(50)=1.6-5.8muM) based on the framework of bis-[H-Dmt-NH]-alkyl (Okada, Y.; Tsuda, Y.; Fujita, Y.; Yokoi, T.; Sasaki, Y.; Ambo, A.; Konishi, R.; Nagata, M.; Salvadori, S.; Jinsmaa, Y.; Bryant, S. D.; Lazarus, L. H. J. Med. Chem.2003, 46, 3201), which exhibited both high mu affinity and bioactivity.
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Affiliation(s)
- Tingyou Li
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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10
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Ligeti M, Gündüz O, Magyar A, Kató E, Rónai AZ, Vita C, Varga I, Hudecz F, Tóth G, Borsodi A, Benyhe S. Synthesis and biological studies of nociceptin derivatives containing the DTPA chelating group for further labeling with therapeutic radionuclides. Peptides 2005; 26:1159-66. [PMID: 15949634 DOI: 10.1016/j.peptides.2005.01.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2004] [Revised: 01/25/2005] [Accepted: 01/26/2005] [Indexed: 11/27/2022]
Abstract
Nociceptin is an endogenous anti-opiate heptadecapeptide primarily interacting with the nociceptin (NOP) receptor. This neuropeptide-receptor system is involved in pain regulation, tolerance to and dependence on opiates as well as many other physiological and pathophysiological events. The role and mechanisms of nociceptin in pathological conditions is not clearly known yet. In an attempt to have a radiopharmaceutical labeled either with 99mTc or (111)In, we incorporated diethylenetriaminepentaacetic acid (DTPA) as chelator into the structure of [Arg14,Lys15]nociceptin(1-17)-NH2 at the epsilon-amino group of Lys15. Such a radiopeptide may be useful in imaging for diagnostical purposes. Preparation of the peptide ligands was carried out by solid phase synthesis. Two peptides containing DTPA were obtained and purified. The products were [Arg14,Lys(DTPA)15]nociceptin(1-17)-NH2 and its cross-linked dimer on the basis of mass spectrometric analysis. In (115)In3+ binding experiments the conjugates exhibited preserved indium ion chelating properties, indicating the potential use of radiolabeled DTPA-nociceptin derivatives as radiopharmaceutical. Biological properties of these compounds were studied in rat brain membrane preparations by radioligand binding, functional biochemical [35S]GTPgammaS binding assays and mouse vas deferens (MVD) bioassay. Besides the similar in vitro binding characteristics to nociceptin receptor, both of the DTPA-chelated compounds were more potent and efficient than nociceptin in functional biochemical and mouse vas deferens bioassays. Our further aim is to radiolabel these compounds in order to get a radiopharmaceutical which can be used diagnostically.
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Affiliation(s)
- Melinda Ligeti
- Research Group of Peptide Chemistry, Eötvös University and Hungarian Academy of Sciences, Budapest, Hungary
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11
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Bryant SD, Jinsmaa Y, Salvadori S, Okada Y, Lazarus LH. Dmt and opioid peptides: a potent alliance. Biopolymers 2004; 71:86-102. [PMID: 12767112 DOI: 10.1002/bip.10399] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The introduction of the Dmt (2',6'-dimethyl-L-tyrosine)-Tic pharmacophore into the design of opioid ligands produced an extraordinary family of potent delta-opioid receptor antagonists and heralded a new phase in opioid research. First reviewed extensively in 1998, the incorporation of Dmt into a diverse group of opioid molecules stimulated the opioid field leading to the development of unique analogues with remarkable properties. This overview will document the crucial role played by this residue in the proliferation of opioid peptides with high receptor affinity (K(i) equal to or less than 1 nM) and potent bioactivity. The discussion will include the metamorphosis between delta-opioid receptor antagonists to delta-agonists based solely on subtle structural changes at the C-terminal region of the Dmt-Tic pharmacophore as well as their behavior in vivo. Dmt may be considered promiscuous due to the acquisition of potent mu-agonism by dermorphin and endomorphin derivatives as well as by a unique class of opioidmimetics containing two Dmt residues separated by alkyl or pyrazinone linkers. Structural studies on the Dmt-Tic compounds were enhanced tremendously by x-ray diffraction data for three potent and biologically diverse Dmt-Tic opioidmimetics that led to the development of pharmacophores for both delta-opioid receptor agonists and antagonists. Molecular modeling studies of other unique Dmt opioid analogues illuminated structural differences between delta- and mu-receptor ligand interactions. The future of these compounds as therapeutic applications for various medical syndromes including the control of cancer-associated pain is only a matter of time and perseverance.
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Affiliation(s)
- Sharon D Bryant
- Peptide Neurochemistry, LCBRA, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.
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12
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Szewczuk Z, Biernat M, Dyba M, Zimecki M. Dimerization of the immunosuppressive peptide fragment of HLA-DR molecule enhances its potency. Peptides 2004; 25:207-15. [PMID: 15063002 DOI: 10.1016/j.peptides.2003.12.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2003] [Revised: 12/18/2003] [Accepted: 12/18/2003] [Indexed: 11/17/2022]
Abstract
Our previous studies revealed that the nonapeptide fragment of HLA-DR molecule, located in the beta chain 164-172 with the VPRSGEVYT sequence, suppresses the immune responses. The sequence is located on the exposed molecule loop, therefore it may be involved in the interactions with other proteins. We suggested that the loop may serve as a functional epitope on the HLA class II surface for intermolecular binding, and that possible mechanism of biological action of the synthesized peptides is associated with interfering of adhesion of HLA class II molecules to their coreceptors. It has been postulated that oligomerization of the coreceptors is required for stable binding to class II HLA. Based on the crystal dimeric structure of HLA-DR molecules, we designed, and synthesized molecules able to induce the putative coreceptors dimerization. The synthesized series of compounds consisted of two VPRSGEVYT sequences linked through their C-termini by spacers of different length: (VPRSGEVYTGn)2K-NH2 ( n = 4-6). The results demonstrate that the dimerization of the nonapeptide fragment of HLA-DR results in enhanced immunosuppressory properties.
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Vonhof S, Gudka BD, Sirén AL. Tolerance and dependence following chronic intracerebroventricular infusions of Tyr-D-Arg2-Phe-Sar4 (TAPS). Eur J Pharmacol 2003; 459:41-8. [PMID: 12505532 DOI: 10.1016/s0014-2999(02)02822-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The dermorphin-derived tetrapeptide Tyr-D-Arg(2)-Phe-Sar(4) (TAPS) was tested for its ability to induce tolerance, cross-tolerance, withdrawal and its substitution properties in rats subjected to chronic intracerebroventricular (i.c.v.) infusions of mu-opiate receptor agonists. Tolerance and cross-tolerance were assessed by quantification of the thermally induced tail-flick response. Chronic intracerebroventricular infusion of TAPS resulted in antinociception at almost 1000-fold lower doses compared to morphine sulphate and [D-Ala(2), MePhe(4)Gly(ol)(5)]enkephalin (DAMGO). Tolerance to the antinociceptive effect of TAPS developed similar to DAMGO and morphine sulphate. Cross-tolerance to intracerebroventricular bolus injections of DAMGO, but not of TAPS, was evident in rats rendered tolerant to morphine sulphate and TAPS. Naloxone-induced withdrawal was equally pronounced in animals treated with morphine sulphate, DAMGO or TAPS. TAPS substituted for morphine sulphate and vice versa regarding the withdrawal syndrome in a cross-over experimental design. In contrast to DAMGO, TAPS retains its antinociceptive effect following bolus administration in rats rendered tolerant to mu-opioid receptor agonists.
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Affiliation(s)
- Stefan Vonhof
- Department of Cardiology and Pneumology, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany.
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14
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Vonhof S, Barone FC, Price WJ, Paakkari P, Millison JH, Feuerstein GZ, Sirén AK. Receptor binding and biological activity of the dermorphin analog Tyr-D-Arg(2)-Phe-Sar (TAPS). Eur J Pharmacol 2001; 416:83-93. [PMID: 11282116 DOI: 10.1016/s0014-2999(01)00874-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The binding of Tyr-D-Arg(2)-Phe-sarcosine(Sar)(4) (TAPS), a proposed mu-opioid receptor-selective tetrapeptide analog of dermorphin to opioid receptors, was studied using selective binding assays for subtypes of mu-, delta- and kappa-opioid receptors. Subtype specific mu-opioid receptor binding was further characterized in the presence of sodium and guanosine nucleotides and the activity of TAPS in isolated guinea pig ileum was compared to other mu-opioid receptor-selective ligands. Further, the antinociceptive properties of TAPS following intrathecal (i.t.) administration in rats, as a model of spinal antinociception, were evaluated. The K(i)-values for TAPS at the mu(1)- and mu(2)-opioid receptor sites were 0.4 and 1.3 nM, respectively, suggesting high affinity binding to mu-opioid receptor binding sites with an increased selectivity to mu(1)-opioid receptor sites. The attenuated reduction of TAPS binding at the mu(2)-opioid receptor subtype in the presence of the stable guanosintriphosphate analog 5'-guanylylimidodiphosphate and sodium suggests a potential partial antagonist mode of action at this site.
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Affiliation(s)
- S Vonhof
- Department of Cardiology and Pulmonology, Zentrum Innere Medizin, University of Göttingen, Germany.
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15
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Tooyama I, Abe H, Renda TG, Kimura H. Production and immunohistochemical application of antiserum against Tyr-D-Ala-Phe, a N-terminal tripeptide common to dermorphin/deltorphin family. Peptides 2000; 21:1649-55. [PMID: 11090918 DOI: 10.1016/s0196-9781(00)00296-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Tyr-D-Ala-Phe is a N-terminal sequence commonly found in a peptide family including dermorphin and deltorphin. The tripeptide was synthesized and conjugated with poly L-lysine. Nuclear magnetic resonance (NMR) indicated that approximately 38 molecules of the tripeptide were bound to each molecule of poly L-lysine. The conjugate was used to immunize rabbits, and high titer antisera were obtained. An IgG fraction was purified by protein G affinity chromatography. A specific antibody to the tripeptide was then obtained by affinity chromatography using formylcellulofine conjugated with Tyr-D-Ala-Phe. On immunospot assay, the best IgG antibody was capable of detecting 125 ng of Tyr-D-Ala-Phe but failed to react even with 2.0 microg of Tyr-L-Ala-Phe or poly L-lysine. Our immunohistochemical examination selectively localized the secretory glands of frog skin.
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Affiliation(s)
- I Tooyama
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Seta, 520-2192, Otsu, Japan.
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Abstract
In 1980 the skin of certain frogs belonging to the genus Phyllomedusinae was found to contain two new peptides that proved to be selective mu-opioid agonists, and named dermorphins. Since 1987 deltorphins, a family of highly selective delta-opioid peptides were identified either by cloning of the cDNA from frog skins or isolation of the peptides. The distinctive feature of opioid peptides is the presence of a naturally occurring D-enantiomer at the second position in their common N-terminal sequence, Tyr-D-Xaa-Phe. The discovery of the amphibian opiate peptides, provided new insights into the functional role of the mu- and delta-opiate systems. It also provided models for novel analgesics with enhanced therapeutic benefits and reduced toxicity.
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Affiliation(s)
- L Negri
- Department of Human Physiology and Pharmacology, University "La Sapienza," P.le Aldo Moro, 5, I-00185, Rome, Italy.
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17
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Abstract
The deltorphins are a class of highly selective delta-opioid heptapeptides from the skin of the Amazonian frogs Phyllomedusa sauvagei and P. bicolor. The first of these fascinating peptides came to light in 1987 by cloning of the cDNA of from frog skins, while the other members of this family were identified either by cDNA or isolation of the peptides. The distinctive feature of deltorphins is the presence of a naturally occurring D-enantiomer at the second position in their common N-terminal sequence, Tyr-D-Xaa-Phe, comparable to dermorphin, which is the prototype of a group of mu-selective opioids from the same source. The D-amino acid and the anionic residues, either Glu or Asp, as well as their unique amino acid compositions are responsible for the remarkable biostability, high delta-receptor affinity, bioactivity and peptide conformation. This review summarizes a decade of research from many laboratories that defined which residues and substituents in the deltorphins interact with the delta-receptor and characterized pharmacological and physiological activities in vitro and in vivo. It begins with a historical description of the topic and presents general schema for the synthesis of peptide analogues of deltorphins A, B and C as a means to document the methods employed in producing a myriad of analogues. Structure activity studies of the peptides and their pharmacological activities in vitro are detailed in abundantly tabulated data. A brief compendium of the current level of knowledge of the delta-receptor assists the reader to appreciate the rationale for the design of these analogues. Discussion of the conformation of these peptides addresses how structure leads to further hypotheses regarding ligand receptor interaction. The review ends with a broad discussion of the potential applications of these peptides in clinical and therapeutic settings.
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Affiliation(s)
- L H Lazarus
- Peptide Neurochemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
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Guerrini R, Capasso A, Marastoni M, Bryant SD, Cooper PS, Lazarus LH, Temussi PA, Salvadori S. Rational design of dynorphin A analogues with delta-receptor selectivity and antagonism for delta- and kappa-receptors. Bioorg Med Chem 1998; 6:57-62. [PMID: 9502105 DOI: 10.1016/s0968-0896(97)10008-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Substitution of 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) in place of Gly2 in dynorphin A-(1-13)-NH2 and -(1-11)-NH2 (DYN) analogues (1 and 2) decreased the affinity to the kappa, delta, and mu receptors, and kappa selectivity. The analogue [D-Ala2, des-Gly3]DYN (4), a chimera between deltorphin/dermorphin N-terminal tripeptide and DYN, was virtually inactive for kappa-sites while the affinities for delta- and mu-receptors remained essentially unchanged. The doubly substituted analogue [2',6'-dimethyl-L-tyrosine (Dmt1)-Tic2]DYN (3) exhibited high delta-affinity (Ki=0.39 nM) while mu- and kappa-affinities were only an order of magnitude less (4-5 nM). Bioactivity of [Tic2]DYN peptides (1-3) on guinea-pig ileum and rabbit jejunum revealed potent delta- and kappa-antagonism, while the delta agonist potency of 4 was comparable to DYN. Thus, conversion from a kappa-agonist to antagonist occurred with the inclusion of Tic into DYN analogues, similar to the appearance of antagonist properties with delta- and mu-opioid agonists containing a Tic2 residue.
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MESH Headings
- Analgesics, Opioid/chemical synthesis
- Analgesics, Opioid/pharmacology
- Animals
- Dose-Response Relationship, Drug
- Drug Design
- Dynorphins/chemical synthesis
- Dynorphins/pharmacology
- Electrophysiology
- Guinea Pigs
- Ileum
- Isoquinolines/chemistry
- Muscle Contraction/drug effects
- Muscle, Smooth/drug effects
- Oligopeptides/chemistry
- Peptide Fragments/chemical synthesis
- Peptide Fragments/pharmacology
- Rabbits
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, kappa/antagonists & inhibitors
- Receptors, Opioid, mu/antagonists & inhibitors
- Structure-Activity Relationship
- Tetrahydroisoquinolines
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Affiliation(s)
- R Guerrini
- Department of Pharmaceutical Sciences and Biotechnology Center, University of Ferrara, Italy
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19
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Prerequisite for His4 in deltorphin A for high? opioid receptor selectivity. Amino Acids 1994; 7:291-304. [DOI: 10.1007/bf00807704] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/1993] [Accepted: 09/20/1993] [Indexed: 10/26/2022]
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20
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Attila M, Salvadori S, Balboni G, Bryant SD, Lazarus LH. Synthesis and receptor binding analysis of dermorphin hepta-, hexa- and pentapeptide analogues. Evidence for one- and two-side binding models for the mu-opioid receptor. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1993; 42:550-9. [PMID: 7905867 DOI: 10.1111/j.1399-3011.1993.tb00363.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Sixteen dermorphin analogues were synthesized and characterized for mu- and delta-opioid receptor binding properties using [3H]DAGO and [3H]DPDPE, respectively. The analogues included the following: substitutions at position 4 and/or the C-terminal residue; deletions of Gly4 or Pro6-Ser7; inclusion of Z or an acetyl group on the epsilon-amino group of Lys7; and the presence of either a C-terminal amide or free acid group. Two peptides, [Lys7-OH]- and [Lys7-NH2]dermorphin, had mu-affinities (Ki mu = 0.15-0.13 nM) and mu-selectivities (Ki delta/Ki mu = 1158-1482) higher than dermorphin (Ki mu = 0.28 nM; Ki delta/Ki mu = 295) and best fitted a one-site binding model similar to dermorphin. Significantly better (P < 0.0001) fits to a two-site binding model vs. a one-site model were observed with four dermorphin analogues: [Lys(Z)7-OH]heptapeptide, [des-Gly4(Tyr4,Pro5,Asn6-OH)]hexapeptide and two pentapeptides, [Tyr5-NH2] and [Trp4,Asn5-OH]. Our data revealed a complex binding pattern for dermorphin analogues to brain mu-receptors in which Hill coefficients less than 0.85 generally suggest heterogeneity of mu-receptors; however, only detailed analyses of the data derived from the non-linear regression fits for one- or two-components gave evidence for the possible existence of two separate [3H]DAGO binding sites. Eight of our dermorphin analogues had significantly better fits for a two-site model (P < 0.05), but only four seemed to have two distinct Ki values (P < 0.0001).
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Affiliation(s)
- M Attila
- National Institute of Environmental Health Sciences, Laboratory of Integrative Biology, Research Triangle Park, North Carolina
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21
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Affiliation(s)
- L H Lazarus
- Peptide Neurochemistry Section, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
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22
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Paakkari P, Paakkari I, Landes P, Sirén AL, Feuerstein G. Respiratory mu-opioid and benzodiazepine interactions in the unrestrained rat. Neuropharmacology 1993; 32:323-9. [PMID: 8098861 DOI: 10.1016/0028-3908(93)90152-s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Interactions of mu-opioid receptors with the benzodiazepine system were studied by examining the modulatory effects of flumazenil (a benzodiazepine antagonist) and alprazolam (a benzodiazepine agonist) on the respiratory effects of the opioid peptide dermorphin. Dermorphin, 1-30 nmol administered i.c.v., to conscious, unrestrained rats decreased ventilation rate (VR) and minute volume (MV) dose-dependently. The ventilatory depression was antagonized by naloxone and by the benzodiazepine antagonist flumazenil. The benzodiazepine alprazolam potentiated the respiratory inhibition of a small (1 nmol) dose of dermorphin but antagonized that of a higher dose (3 nmol). The results suggest that the benzodiazepine/GABA receptor complex modulates respiratory depression induced by central mu-receptor stimulation in the rat.
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Affiliation(s)
- P Paakkari
- Department of Neurology, Uniformed Services University of the Health Sciences, Bethesda, MD 20184
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23
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Lazarus LH, Salvadori S, Attila M, Grieco P, Bundy DM, Wilson WE, Tomatis R. Interaction of deltorphin with opioid receptors: molecular determinants for affinity and selectivity. Peptides 1993; 14:21-8. [PMID: 8382810 DOI: 10.1016/0196-9781(93)90006-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Opioid receptor analyses of deltorphin A (H-Tyr-D-Met-Phe-His-Leu-Met-Asp-NH2) analogues indicated the following: (a) increased negativity differentially affected affinities (Ki) and selectivity (Ki mu/Ki delta); (b) shifted sequence heptapeptides, [Asp5,Leu6,Met-NH2(7)] and [Asp4,His5,Leu6,Met-NH2(7)], reversed selectivity (delta-->mu); (c) substitutions at positions 4, 5, and 6 diminished selectivity, with changes in residue 5 being the most detrimental; (d) C-terminal deletions differentially effected Ki. These are the first data to demonstrate a reversal of delta selectivity in heptapeptides containing a negative charge and indicate that modifications in affinity occur through changes in both anionic and hydrophobic properties of residues at specific positions in the peptide. Deltorphin analogues might also be applied to differentiate between opioid receptor subsites.
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Affiliation(s)
- L H Lazarus
- Peptide Neurochemistry Section, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
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24
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Lazarus LH, Salvadori S, Grieco P, Wilson WE, Tomatis R. Unique sequence in deltorphin C confers structural requirement for δ opioid receptor selectivity. Eur J Med Chem 1992. [DOI: 10.1016/0223-5234(92)90113-f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Affiliation(s)
- V Erspamer
- Institute of Medical Pharmacology III, University La Sapienza, Città Universitaria, Rome, Italy
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26
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Charpentier S, Sagan S, Delfour A, Nicolas P. Dermenkephalin and deltorphin I reveal similarities within ligand-binding domains of mu- and delta-opioid receptors and an additional address subsite on the delta-receptor. Biochem Biophys Res Commun 1991; 179:1161-8. [PMID: 1656944 DOI: 10.1016/0006-291x(91)91693-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Dermorphin (Tyr-D-Ala-Phe-Gly-Tyr-Pro-Ser-NH2), dermenkephalin (Tyr-D-Met-Phe-His-Leu-Met-Asp-NH2) and deltorphin I (Tyr-D-Ala-Phe-Asp-Val-Val-Gly-NH2) are the first naturally occurring peptides highly potent for and almost specific to the mu- and delta-opioid receptors, respectively. The amino-terminal domains Tyr-D-X-Phe (where X is either Ala or Met) of these peptides behave as selective and potent mu-receptor ligands. Routing of Tyr-D-X-Phe to the delta- or the mu- receptor is associated with the presence or the absence at the C-terminus of an additional hydrophobic and negatively charged tetrapeptide by-passing the mu-addressing ability of the amino-terminal moiety. A study of 20 Tyr-D-X-Phe-Y-NH2 analogs with substitution of X and Y by neutral, hydrophobic, aromatic amino acids as well as by charged amino acid residues shows that tetrapeptides maintain high binding affinity and selectivity for the mu-opioid receptor. Although residue in position 4 serves a delta-address function, the tripeptide motif at the C-terminus of dermenkephalin and deltorphin I are critical components for high selectivity at delta-opioid receptor. Results demonstrate that mu- and delta-opioid receptors share topologically equivalent ligand-binding domains, or ligand-binding sequences similarities, that recognized Tyr-D-X-Phe as a consensus message-binding sequence. The delta-receptor additionally contains a unique address subsite at or near the conserved binding domain that accommodates the C-terminal tetrapeptide motif of dermenkephalin and deltorphin I.
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Affiliation(s)
- S Charpentier
- Laboratoire de Bioactivation des Peptides, Institut Jacques Monod, Université Paris 7, France
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27
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Lazarus LH, Salvadori S, Tomatis R, Wilson WE. Opioid receptor selectivity reversal in deltorphin tetrapeptide analogues. Biochem Biophys Res Commun 1991; 178:110-5. [PMID: 1648906 DOI: 10.1016/0006-291x(91)91786-c] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Deltorphin N-terminal tetrapeptides [DEL A: H-Tyr-D-Met-Phe-His-R, where R = -NH2, -NH-NH2, -OCH3, -OH, -NH-NH-CO-R' (R' = -CH3 or adamantane); DEL C: H-Tyr-D-Ala-Asp-R (R = -OH, -NHCH3)], were used in a receptor binding assay with [3H]DADLE and [3H]DPDPE for delta sites, and [3H]DAGO for mu sites; tetrapeptide Ki delta values were similar with either [3H]-delta ligand. DEL A tetrapeptides C-terminally substituted with -NH2, -NH-NH2, -OCH3, and -OH had 10 to greater than 1,000-fold decreased Ki delta values, while Ki mu increased 5 to 100-fold to yield mu selectivity. C-Terminal substitution with -NH-NH2 and -OCH3 conferred highest mu selectivities; adamantyl and acetyl hydrazide derivatives were non-selective. DEL-(1-4)-OH peptides had decreased delta and mu affinities: DEL A-[Asp4]-(1-4)-OH and DEL C-(1-4)-OH had low affinities (greater than 1 microM), however, the Ki delta of the former was 5-fold greater than the latter, and the Ki mu was less by 15-fold. The data suggest that the "message" domain of DEL exhibits receptor selectivity different from that of the heptapeptide.
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MESH Headings
- Animals
- Brain/metabolism
- Enkephalin, Ala(2)-MePhe(4)-Gly(5)-
- Enkephalin, D-Penicillamine (2,5)-
- Enkephalin, Leucine-2-Alanine/metabolism
- Enkephalins/metabolism
- Kinetics
- Oligopeptides/pharmacology
- Rats
- Receptors, Opioid/drug effects
- Receptors, Opioid/metabolism
- Receptors, Opioid, delta
- Receptors, Opioid, mu
- Structure-Activity Relationship
- Synaptosomes/metabolism
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Affiliation(s)
- L H Lazarus
- Peptide Neurochemistry, LMIN, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
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28
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Mor A, Delfour A, Nicolas P. Identification of a D-alanine-containing polypeptide precursor for the peptide opioid, dermorphin. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)38113-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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29
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Melchiorri P, Negri L, Falconieri-Erspamer G, Severini C, Corsi R, Soaje M, Erspamer V, Barra D. Structure-activity relationships of the delta-opioid-selective agonists, deltorphins. Eur J Pharmacol 1991; 195:201-7. [PMID: 1651862 DOI: 10.1016/0014-2999(91)90536-y] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Deltorphins are naturally occurring peptides with high affinity and selectivity for delta-opioid receptors. They share with dermorphin, another mu-selective opioid agonist, the same N-terminal tripeptide Tyr-D-Xaa-Phe, where D-Xaa is a D-Ala or a D-Met residue. This common sequence appears to be essential for the best fitting of the peptides to both mu- or delta-opioid sites. We studied the changes in receptor affinity and selectivity and in biological potency of deltorphins due to shortening of the sequence, C-terminal deamidation or single amino acid substitutions. The results support the view that a code addressing the molecule towards delta-opioid sites is expressed in the C-terminal region of these peptides. This addressing domain confers high delta-selectivity to the ligand in the following two ways: (i) increased affinity for delta-sites; (ii) decreased affinity for mu-sites. The sequence of the C-terminal tripeptide appears to be responsible for the high delta-affinity of the molecules. Negatively charged side chains inhibit mu-binding and enhance delta-selectivity.
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Affiliation(s)
- P Melchiorri
- Institute of Pharmacology, University La Sapienza, Rome, Italy
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30
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Schiller PW. Development of receptor-specific opioid peptide analogues. PROGRESS IN MEDICINAL CHEMISTRY 1991; 28:301-40. [PMID: 1668844 DOI: 10.1016/s0079-6468(08)70367-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- P W Schiller
- Laboratory of Chemical Biology and Peptide Research, Clinical Research Institute of Montreal, Que., Canada
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31
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Taché Y, Yang H. Brain regulation of gastric acid secretion by peptides. Sites and mechanisms of action. Ann N Y Acad Sci 1990; 597:128-45. [PMID: 2201237 DOI: 10.1111/j.1749-6632.1990.tb16163.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Y Taché
- Center for Ulcer Research and Education, Veterans Administration Wadsworth Medical Center, Los Angeles, California 90073
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32
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Lazarus LH, Wilson WE, de Castiglione R, Guglietta A. Dermorphin Gene Sequence Peptide with High Affinity and Selectivity for δ-Opioid Receptors. J Biol Chem 1989. [DOI: 10.1016/s0021-9258(18)94026-3] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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