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Navolotskaya EV, Sadovnikov VB, Lipkin VM. Synthetic Peptide TPLVTLFK, a Selective Agonist of Nonopioid β-Endorphin Receptor, Reduces the Corticotropin and Corticosterone Response. Int J Pept Res Ther 2016. [DOI: 10.1007/s10989-016-9543-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sadovnikov VB, Zinchenko DV, Navolotskaya EV. The synthetic peptide octarphin activates soluble guanylate cyclase in macrophages. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1068162016030122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Navolotskaya EV. [Octarphin--Nonopioid Peptide of the Opioid Origin]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2016; 41:524-30. [PMID: 26762089 DOI: 10.1134/s106816201505009x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The data on the properties and mechanism of action of the peptide octarphin (TPLVTLFK, the fragment 12-19 of β-endorphin)--a selective agonist of nonopioid (insensitive to the action of the opioid antagonist naloxone) β-endorphin receptor found on n immune cells (peritoneal macrophages, T and B lymphocytes of spleen and blood), endocrine (adrenal cortex, hypothalamus), cardiovascular (cardiomyocytes) systems are analyzed and systematized. Binding to the receptor octarphin increases increases the mitogen-induced pro- liferation of human and mouse T and B lymphocytes in vitro, activates murine peritoneal macrophages in vitro and in vivo, stimulates growth of human T-lymphoblast cell lines Jurkat and MT-4, inhibits adenylate cyclase activity of rat adrenal cortex membranes and suppresses the secretion of glucocorticoids from the adrenal gland into the blood. It was shown that in a concentration range of 1-1000 nM the peptide increases the activity of inducible NO-synthase (iNOS), and the content of NO and cGMP in lipopolysaccharide-activated murine peritoneal macrophages. Taking into account that NO acts as a primary activator of soluble guanylate cyclase (sGC), it can be assumed that the activating effect of octarphin on macrophages is realized in the following way: increase in th iNOS expression --> increase in the NO production --> increase in the sGC activity --> increase in intracellular levels of cGMP.
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Sadovnikov VB, Navolotskaya EV. Synthetic peptide octarphin (TPLVTLFK), a selective agonist of nonopioidβ-endorphin receptor, stimulates nitric oxide synthesis in macrophages. J Pept Sci 2014; 20:212-5. [DOI: 10.1002/psc.2603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 11/12/2013] [Accepted: 11/18/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Vladimir B. Sadovnikov
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
| | - Elena V. Navolotskaya
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
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Kavushansky A, Kritman M, Maroun M, Klein E, Richter-Levin G, Hui KS, Ben-Shachar D. β-endorphin degradation and the individual reactivity to traumatic stress. Eur Neuropsychopharmacol 2013; 23:1779-88. [PMID: 23352317 DOI: 10.1016/j.euroneuro.2012.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 10/18/2012] [Accepted: 12/15/2012] [Indexed: 01/04/2023]
Abstract
Reactivity to traumatic stress varies between individuals and only a minority of those exposed to trauma develops stress-induced psychopathologies. Currently extensive effort is made to unravel the specific mechanisms predisposing to vulnerability vs. resilience to stress. We investigated in rats the role of β-endorphin metabolism in vulnerability to acute traumatic stress. Responders (showing extreme anxiety; n=7) and resilient non-responders (not differing from the non-stressed individuals; n=8) to traumatic foot-shock stress were compared for their blood levels of stress hormones as well as brain levels and activity of two opioid-degrading enzymes. β-endorphin is a substrate to insulin degrading enzyme, which also degrades insulin. Therefore, the effects of insulin application on behavioral and hormonal responses and on β-endorphin degradation were tested. Pre- and post-stress levels of serum corticosterone, and post-stress plasma β-endorphin concentration differentiated between the responders and the non-responders. In brain, responders showed enhanced degradation rates of β-endorphin, assessed by Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS), in hippocampal and amygdalar slices as compared to non-responders. Application of insulin to the amygdala, prior to exposure to traumatic stress, reduced post-stress anxiety and serum corticosterone levels only in the responders. In parallel, amygdalar β-endorphin degradation rate was also reduced by insulin. These results suggest that slowing down β-endorphin degradation rate may constitute an integral part of the normal stress-response, upon a failure of which an extreme anxiety develops. Modulation of opioid degradation may thus present a potential novel target for interference with extreme anxiety.
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Affiliation(s)
- Alexandra Kavushansky
- Department of Internal Medicine, Rambam Medical Center, Laboratory of Psychobiology, B. Rappaport Faculty of Medicine and B. Rappaport Research Institute, Technion, Haifa, Israel
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Nekrasova YN, Navolotskaya EV. Interaction of synthetic peptide octarphin (TPLVTLFK) with human blood lymphocytes. J Pept Sci 2013; 19:499-503. [DOI: 10.1002/psc.2527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 05/13/2013] [Accepted: 05/17/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Yuliia N. Nekrasova
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
| | - Elena V. Navolotskaya
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
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Nekrasova YN, Zolotarev YA, Navolotskaya EV. Synthetic peptide octarphin (TPLVTLFK) inhibits the activity of the hypothalamus–pituitary–adrenal axis through nonopioid β-endorphin receptor. ACTA ACUST UNITED AC 2013; 183:23-6. [DOI: 10.1016/j.regpep.2013.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 07/11/2012] [Accepted: 03/03/2013] [Indexed: 11/24/2022]
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Nekrasova YN, Zolotarev YA, Navolotskaya EV. Interaction of synthetic peptide octarphin with human blood lymphocytes. BIOCHEMISTRY (MOSCOW) 2013; 78:309-13. [DOI: 10.1134/s0006297913030140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nekrasova YN, Zolotarev YA, Navolotskaya EV. Interaction of the synthetic peptide octarphin with rat adrenal cortex membranes. BIOCHEMISTRY (MOSCOW) 2012; 77:1377-81. [DOI: 10.1134/s000629791212005x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nekrasova YN, Zolotarev YA, Navolotskaya EV. Synthetic peptide TPLVTLFK (octarphin) reduces the corticosterone production by rat adrenal cortex through nonopioid β-endorphin receptor. J Pept Sci 2012; 18:495-9. [DOI: 10.1002/psc.2424] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 04/22/2012] [Accepted: 05/04/2012] [Indexed: 11/05/2022]
Affiliation(s)
- Yuliia N. Nekrasova
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry; Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
| | - Yury A. Zolotarev
- Institute of Molecular Genetics; Russian Academy of Sciences; Kurchatov square, 2 Moscow 123182 Russia
| | - Elena V. Navolotskaya
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry; Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
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Opioid glycopeptide analgesics derived from endogenous enkephalins and endorphins. Future Med Chem 2012; 4:205-26. [PMID: 22300099 DOI: 10.4155/fmc.11.195] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Over the past two decades, potent and selective analgesics have been developed from endogenous opioid peptides. Glycosylation provides an important means of modulating interaction with biological membranes, which greatly affects the pharmacodynamics and pharmacokinetics of the resulting glycopeptide analogues. Furthermore, manipulation of the membrane affinity allows penetration of cellular barriers that block efficient drug distribution, including the blood-brain barrier. Extremely potent and selective opiate agonists have been developed from endogenous peptides, some of which show great promise as drug candidates.
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Nekrasova YN, Navolotskaya EV. The synthetic peptide octraphin TPLVTLFK is a selective agonist of nonopioid β-endorphin receptor. BIOCHEMISTRY MOSCOW SUPPLEMENT SERIES A-MEMBRANE AND CELL BIOLOGY 2012. [DOI: 10.1134/s1990747811060092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nekrasova YN, Zolotarev YA, Navolotskaya EV. Interaction of synthetic peptide octarphin with rat myocardium membranes. BIOCHEMISTRY (MOSCOW) 2011; 76:1337-41. [DOI: 10.1134/s0006297911120066] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nekrasova YN, Zolotarev YA, Navolotskaya EV. Detection of nonopioid β
-endorphin receptor in the rat myocardium. J Pept Sci 2011; 18:83-7. [DOI: 10.1002/psc.1417] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 07/22/2011] [Accepted: 08/25/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Yulia N. Nekrasova
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
| | - Yury A. Zolotarev
- Institute of Molecular Genetics of the Russian Academy of Sciences; Kurchatov square, 2 Moscow 123182 Russia
| | - Elena V. Navolotskaya
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Science Avenue, 6 Pushchino Moscow Region 142290 Russia
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Kovalitskaya YA, Nekrasova YN, Sadovnikov VB, Zolotarev YA, Navolotskaya EV. Immunostimulating effect of the synthetic peptide octarphin corresponding to β-endorphin fragment 12-19. BIOCHEMISTRY (MOSCOW) 2011; 76:596-604. [PMID: 21639840 DOI: 10.1134/s0006297911050105] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We have synthesized the peptide TPLVTLFK corresponding to β-endorphin fragment 12-19 (dubbed octarphin) and its analogs (LPLVTLFK, TLLVTLFK, TPLVLLFK, TPLVTLLK, TPLVTLFL). The octarphin peptide was labeled with tritium (specific activity 28 Ci/mol), and its binding to murine peritoneal macrophages was studied. [3H]Octarphin was found to bind to macrophages with high affinity (K(d) = 2.3 ± 0.2 nM) and specificity. The specific binding of [3H]octarphin was inhibited by unlabeled b-endorphin and the selective agonist of nonopioid b-endorphin receptor synthetic peptide immunorphin (SLTCLVKGFY) (K(i) = 2.7 ± 0.2 and 2.4 ± 0.2 nM, respectively) and was not inhibited by unlabeled naloxone, a-endorphin, γ-endorphin, or [Met(5)]enkephalin (K(i) > 10 mM). Inhibitory activity of unlabeled octarphin analogs was more than 100 times lower than that of unlabeled octarphin. Octarphin was shown to stimulate activity of murine immunocompetent cells in vitro and in vivo: at concentration of 1-10 nM it enhanced the adhesion and spreading of peritoneal macrophages as well as their ability to digest bacteria of Salmonella typhimurium virulent strain 415 in vitro; the peptide administered intraperitoneally at a dose of 20 µg/animal on day 7, 3, and 1 prior to isolation of cells increased activity of peritoneal macrophages as well as spleen T- and B-lymphocytes.
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Affiliation(s)
- Yu A Kovalitskaya
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino, Moscow Region
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Kovalitskaya YA, Navolotskaya EV. Nonopioid effect of β-endorphin. BIOCHEMISTRY (MOSCOW) 2011; 76:379-93. [PMID: 21585314 DOI: 10.1134/s0006297911040018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
This review presents the generalized literature data and the results of our own research of the nonopioid effect of β-endorphin, an opioid neuropeptide interacting not only with opioid but also with nonopioid (insensitive to the opioid antagonist naloxone) receptors. The roles of the hormone and its receptors in regulation of the immune, nervous, and endocrine systems are discussed. The effect of neuromediator on the immune system mediated by both opioid and nonopioid receptors is considered in detail. The data on distribution and function of the nonopioid β-endorphin receptor in human and animal organisms are presented. All available data on the characteristics of the nonopioid β-endorphin receptor obtained by means of radioligand analysis are given. The discussed information is supposed to extend our conceptions of the role of β-endorphin in mammals and to be of extensive use in medicine and pharmacology.
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Affiliation(s)
- Yu A Kovalitskaya
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino, Moscow Region, Russia.
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Nekrasova IN, Sadovnikov VB, Zolotarev IA, Navolotskaia EV. [Effects and mechanism of action of synthetic peptide octarphin]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2010; 36:638-45. [PMID: 21063450 DOI: 10.1134/s1068162010050067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We have synthesized the peptide TPLVTLFK corresponding to the β-endorphin fragment 12-19 (the name given by the authors - octarphin), and its analogs (LPLVTLFK, TLLVTLFK, TPLVLLFK, TPLVTLLK, TPLVTLFL). The peptide octarphin was labeled with tritium (the specific activity of 28 Ci/mmol) and its binding to the murine peritoneal macrophages has been studied. [(3)H]Octarphin was found to bind to macrophages with high affinity (K(d) = 2.3 ± 0.2 nM) and specificity. The specific binding of [(3)H]octarphin is inhibited by unlabeled β-endorphin and selective agonist of non-opioid β-endorphin receptor synthetic peptide immunorphin (SLTCLVKGFY) (K(i) = 2.7 ± 0.2 and 2.4 ± 0.2 nM respectively) and not inhibited by unlabeled naloxone, α-endorphin, γ-endorphin and [Met(5)]enkephalin (K(i) > 10 μM). Inhibiting activity of unlabeled analogs of octarphin is more then 100 times lower the unlabeled octarphin. Octarphin stimulates activity of murine immunocompetent cells in vitro and in vivo: at the concentration of 1-10 nM enhances the adhesion and spreading of peritoneal macrophages as well as their capacity to digest bacteria of Salmonella typhimurium virulent strain 415 in vitro. Intraperitoneal administration of peptide at dose 20 μg/animal on day 7,3 and 1 prior to the isolation of cells increases activity of peritoneal macrophages as well as T- and B-spleen lymphocytes.
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Nekrasova YN, Sadovnikov VB, Zolotarev YA, Navolotskaya EV. Binding of synthetic peptide TPLVTLFK to nonopioid beta-endorphin receptor on rat brain membranes. J Pept Sci 2010; 16:263-8. [PMID: 20474037 DOI: 10.1002/psc.1231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The synthetic peptide TPLVTLFK corresponding to the sequence 12-19 of beta-endorphin (referred to as octarphin) was found to bind to high-affinity naloxone-insensitive binding sites on membranes isolated from the rat brain cortex (K(d) = 2.6 +/- 0.2 nM). The binding specificity study revealed that these binding sites were insensitive not only to naloxone but also to alpha-endorphin, gamma-endorphin, [Met(5)]enkephalin, and [Leu(5)]enkephalin, as well. The [(3)H]octarphin specific binding with brain membranes was inhibited by unlabeled beta-endorphin (K(i) = 2.4 +/- 0.2 nM) and a selective agonist of nonopioid beta-endorphin receptor decapeptide immunorphin SLTCLVKGFY (K(i) = 2.9 +/- 0.2 nM). At the same time, unlabeled octarphin completely (by 100%) inhibited the specific binding of [(3)H]immunorphin with membranes (K(i) = 2.8 +/- 0.2 nM). Thus, octarphin binds with a high affinity and specificity to nonopioid receptor of beta-endorphin on rat brain cortex membranes.
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Affiliation(s)
- Yuliia N Nekrasova
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
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Kovalitskaya YA, Navolotskaya EV. Synthetic peptide immunorphin as an instrument of the study of nonopioid β-endorphin receptor. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2010. [DOI: 10.1134/s106816201001005x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
This paper is the 31st consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2008 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing, NY 11367, United States.
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