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Schmidhammer H, Al-Khrasani M, Fürst S, Spetea M. Peripheralization Strategies Applied to Morphinans and Implications for Improved Treatment of Pain. Molecules 2023; 28:4761. [PMID: 37375318 DOI: 10.3390/molecules28124761] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/02/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Opioids are considered the most effective analgesics for the treatment of moderate to severe acute and chronic pain. However, the inadequate benefit/risk ratio of currently available opioids, together with the current 'opioid crisis', warrant consideration on new opioid analgesic discovery strategies. Targeting peripheral opioid receptors as effective means of treating pain and avoiding the centrally mediated side effects represents a research area of substantial and continuous attention. Among clinically used analgesics, opioids from the class of morphinans (i.e., morphine and structurally related analogues) are of utmost clinical importance as analgesic drugs activating the mu-opioid receptor. In this review, we focus on peripheralization strategies applied to N-methylmorphinans to limit their ability to cross the blood-brain barrier, thus minimizing central exposure and the associated undesired side effects. Chemical modifications to the morphinan scaffold to increase hydrophilicity of known and new opioids, and nanocarrier-based approaches to selectively deliver opioids, such as morphine, to the peripheral tissue are discussed. The preclinical and clinical research activities have allowed for the characterization of a variety of compounds that show low central nervous system penetration, and therefore an improved side effect profile, yet maintaining the desired opioid-related antinociceptive activity. Such peripheral opioid analgesics may represent alternatives to presently available drugs for an efficient and safer pain therapy.
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Affiliation(s)
- Helmut Schmidhammer
- Department of Pharmaceutical Chemistry, Institute of Pharmacy and Center for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Mahmoud Al-Khrasani
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, H-1445 Budapest, Hungary
| | - Susanna Fürst
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, H-1445 Budapest, Hungary
| | - Mariana Spetea
- Department of Pharmaceutical Chemistry, Institute of Pharmacy and Center for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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2
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Düzenli N, Ülker S, Şengül G, Kayhan B, Önal A. Effects of cyanocobalamin and its combination with morphine on neuropathic rats and the relationship between these effects and thrombospondin-4 expression. Korean J Pain 2022; 35:66-77. [PMID: 34966013 PMCID: PMC8728557 DOI: 10.3344/kjp.2022.35.1.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 12/04/2021] [Accepted: 12/04/2021] [Indexed: 11/06/2022] Open
Abstract
Background Thrombospondin-4 (TSP4) upregulates in the spinal cord following peripheral nerve injury and contributes to the development of neuropathic pain (NP). We investigated the effects of cyanocobalamin alone or in combination with morphine on pain and the relationship between these effects and spinal TSP4 expression in neuropathic rats. Methods NP was induced by chronic constriction injury (CCI) of the sciatic nerve. Cyanocobalamin (5 and 10 mg/kg/day) was administered 15 days before CCI and then for 4 and 14 postoperative days. Morphine (2.5 and 5 mg/kg/day) was administered only post-CCI. Combination treatment included cyanocobalamin and morphine, 10 and 5 mg/kg/day, respectively. All drugs were administered intraperitoneally. Nociceptive thresholds were detected by esthesiometer, analgesia meter, and plantar test, and TSP4 expression was assessed by western blotting and fluorescence immunohistochemistry. Results CCI decreased nociceptive thresholds in all tests and induced TSP4 expression on the 4th postoperative day. The decrease in nociceptive thresholds persisted except for the plantar test, and the increased TSP4 expression reversed on the 14th postoperative day. Cyanocobalamin and low-dose morphine alone did not produce any antinociceptive effects. High-dose morphine improved the decreased nociceptive thresholds in the esthesiometer when administered alone but combined with cyanocobalamin in all tests. Cyanocobalamin and morphine significantly induced TSP4 expression when administered alone in both doses for 4 or 14 days. However, this increase was less when the two drugs are combined. Conclusions The combination of cyanocobalamin and morphine is more effective in antinociception and partially decreased the induced TSP4 expression compared to the use of either drug alone.
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Affiliation(s)
- Neslihan Düzenli
- Department of Medical Pharmacology, Faculty of Medicine, Ege University, Bornova, Izmir, Turkey
| | - Sibel Ülker
- Department of Medical Pharmacology, Faculty of Medicine, Ege University, Bornova, Izmir, Turkey
| | - Gülgün Şengül
- Department of Anatomy, Faculty of Medicine, Ege University, Bornova, Izmir, Turkey
| | - Buse Kayhan
- Department of Neuroscience, Faculty of Health Sciences, Ege University, Bornova, Izmir, Turkey
| | - Aytül Önal
- Department of Medical Pharmacology, Faculty of Medicine, Ege University, Bornova, Izmir, Turkey
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3
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Yadlapalli JSK, Albayati ZAF, Breen PJ, Dobretsov M, Penthala NR, Hendrickson HP, Crooks PA. A pharmacokinetic study of morphine-6-O-sulfate in rat plasma and brain. Drug Dev Res 2021; 82:802-814. [PMID: 33427316 DOI: 10.1002/ddr.21785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/29/2020] [Accepted: 11/25/2020] [Indexed: 11/10/2022]
Abstract
Morphine-6-O-sulfate (M6S), a polar, zwitterionic sulfate ester of morphine, is a powerful and safe analgesic in several rat models of pain. A sensitive liquid chromatography-tandem mass spectrometry bioanalytical method was developed and validated for the simultaneous determination of M6S and morphine (MOR) in rat plasma and brain after M6S administration. Morphine-d6 was used as internal standard. Multiple reaction monitoring was used for detection and quantitation of M6S, MOR, and morphine-d6 in the turbo ion spray positive mode. The chromatographic separation was carried out on an Alltech Altima C18 column. The analytical method was validated for linearity, precision, accuracy, specificity, and stability over a concentration range of 3-8000 ng/ml in rat plasma and 10-10,000 ng/ml in brain samples for both M6S and MOR. The validated method was applied to determine the PK profile of M6S in plasma after i.v., i.p., and oral dosing in male Sprague-Dawley rats. Rats were administered M6S by i.p. administration (5.6 and 10.0 mg/kg) or orally (10 and 30 mg/kg) and bioavailability compared to an i.v. injection (1 mg/kg) of M6S. The in vivo results indicate that M6S is not a prodrug of morphine, since M6S is not biotransformed into MOR in plasma after either i.p. or oral administration, and MOR was not detected in brain. The bioavailability of M6S was >93% and about 5% after i.p. and oral dosing, respectively. The low oral bioavailability of M6S may be due to poor permeation of the intestinal epithelial membrane. After i.p.-administration, M6S appears to reach brain tissues in low, but significant, concentrations.
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Affiliation(s)
- Jai Shankar K Yadlapalli
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Zaineb A F Albayati
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Philip J Breen
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Maxim Dobretsov
- Department of Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.,Department of Neurobiology and Developmental Neuroscience, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Narsimha R Penthala
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Howard P Hendrickson
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Peter A Crooks
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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Comparisons of In Vivo and In Vitro Opioid Effects of Newly Synthesized 14-Methoxycodeine-6- O-sulfate and Codeine-6- O-sulfate. Molecules 2020; 25:molecules25061370. [PMID: 32192229 PMCID: PMC7144380 DOI: 10.3390/molecules25061370] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 12/13/2022] Open
Abstract
The present work represents the in vitro (potency, affinity, efficacy) and in vivo (antinociception, constipation) opioid pharmacology of the novel compound 14-methoxycodeine-6-O-sulfate (14-OMeC6SU), compared to the reference compounds codeine-6-O-sulfate (C6SU), codeine and morphine. Based on in vitro tests (mouse and rat vas deferens, receptor binding and [35S]GTPγS activation assays), 14-OMeC6SU has µ-opioid receptor-mediated activity, displaying higher affinity, potency and efficacy than the parent compounds. In rats, 14-OMeC6SU showed stronger antinociceptive effect in the tail-flick assay than codeine and was equipotent to morphine, whereas C6SU was less efficacious after subcutaneous (s.c.) administration. Following intracerebroventricular injection, 14-OMeC6SU was more potent than morphine. In the Complete Freund’s Adjuvant-induced inflammatory hyperalgesia, 14-OMeC6SU and C6SU in s.c. doses up to 6.1 and 13.2 µmol/kg, respectively, showed peripheral antihyperalgesic effect, because co-administered naloxone methiodide, a peripherally acting opioid receptor antagonist antagonized the measured antihyperalgesia. In addition, s.c. C6SU showed less pronounced inhibitory effect on the gastrointestinal transit than 14-OMeC6SU, codeine and morphine. This study provides first evidence that 14-OMeC6SU is more effective than codeine or C6SU in vitro and in vivo. Furthermore, despite C6SU peripheral antihyperalgesic effects with less gastrointestinal side effects the superiority of 14-OMeC6SU was obvious throughout the present study.
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Szymaszkiewicz A, Włodarczyk J, Mazur M, Olczak J, Fichna J, Zielińska M. Cyclic derivatives of morphiceptin possess anti-transit effect in the gastrointestinal tract and alleviate abdominal pain in mice. Pharmacol Rep 2020; 72:314-321. [PMID: 32125684 DOI: 10.1007/s43440-020-00084-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 02/11/2020] [Accepted: 02/20/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND Irritable bowel syndrome (IBS) is a chronic condition with recurring gastrointestinal (GI) symptoms: altered motility and abdominal pain. As endogenous opioid system participates in pain perception and in the control of GI peristalsis, opioids have been proposed as a promising therapy in IBS. In a previous study, we observed that morphiceptin derivative, P-317 (Dmt-cyclo-(D-Lys-Phe-D-Pro-Asp)-NH2), presents promising features to be applied in IBS. In this project, we tested whether modifications in cyclic morphiceptin-based structure: fluorination (compound 1) or peptide bond reduction (compound 2) improve pharmacological effect. METHODS We evaluated tested derivatives in the mouse GI system under physiological (GI transit) and pathophysiological (castor oil diarrhea, stress-induced hypermotility, visceral pain) conditions. RESULTS Both compounds prolonged GI transit. Compound 1 and P-317 inhibited upper GI transit and motility of the colon; compound 2 remained inactive. Compound 1 and P-317 inhibited hypermotility in stressed mice and delayed the acute diarrhea in comparison to control. Only P-317 exerted antinociceptive effect. None of tested derivatives, similar to P-317, affected locomotor activity. CONCLUSIONS Compound 1 is equally effective as P-317 in the mouse GI tract. The peptide bond reduction decreased the activity of compound 2. Fluorination appears to be an efficient way to increase the effects of morphiceptin analogs in the GI tract.
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Affiliation(s)
- Agata Szymaszkiewicz
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland
| | - Jakub Włodarczyk
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland
| | - Marzena Mazur
- TriMen Chemicals, Lodz, Poland
- OncoArendi Therapeutics SA, Warsaw, Poland
| | - Jacek Olczak
- TriMen Chemicals, Lodz, Poland
- OncoArendi Therapeutics SA, Warsaw, Poland
| | - Jakub Fichna
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland
| | - Marta Zielińska
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland.
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Yadlapalli JSK, Bommagani SB, Mahelona RD, Wan A, Gannon BM, Penthala NR, Dobretsov M, Crooks PA, Fantegrossi WE. Evaluation of morphine-like effects of the mixed mu/delta agonist morphine-6- O-sulfate in rats: Drug discrimination and physical dependence. Pharmacol Res Perspect 2018; 6:e00403. [PMID: 29930811 PMCID: PMC6009770 DOI: 10.1002/prp2.403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 04/10/2018] [Indexed: 12/31/2022] Open
Abstract
Morphine-6-O-sulfate (M6S) is as a mixed-action mu/delta (μ/δ) opioid receptor agonist with high potency and analgesic efficacy. These studies used assays of drug discrimination and schedule-controlled responding to assess abuse-liability, tolerance, and physical dependence as compared to morphine in rats. Attempts to train 0.3 mg/kg (IP) M6S from saline failed, but all rats rapidly acquired the discrimination when the training dose was changed to 3.0 mg/kg morphine, and substitution tests showed that morphine and fentanyl both fully substituted for the training dose, M6S and M3A6S (3-O-acetyl ester of M6S) only partially substituted, and salvinorin A did not elicit morphine-like effects. Tolerance to response rate-decreasing effects was studied in rats administered either 1.0 or 3.0 mg/kg morphine or M6S before food-reinforced operant sessions. At both unit doses, tolerance to M6S-elicited rate suppression developed more slowly than tolerance to morphine-induced reductions in response rates. To assess dependence, rats were maintained on 1.0 mg/kg morphine or 1.0 mg/kg M6S until food-reinforced response rates were stable for at least 5 days. Rats were then administered saline or increasing doses of the opioid antagonist naltrexone (NTX) (0.3, 1.0, 3.0, or 10.0 mg/kg) in order to determine antagonist-precipitated withdrawal. NTX precipitated withdrawal was similar in both morphine-maintained and M6S-maintained rats. In conclusion, the mixed μ/δ agonist activity of M6S failed to completely protect against the development of physical dependence, but delayed tolerance development to behavioral effects and resulted in decreased morphine-like subjective effects, perhaps implying a decreased abuse liability over μ agonists.
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Affiliation(s)
- Jai Shankar K. Yadlapalli
- Departments of Pharmaceutical SciencesUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Shoban Babu Bommagani
- Departments of Pharmaceutical SciencesUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Ryan D. Mahelona
- Department of Pharmacology and ToxicologyUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Anqi Wan
- Departments of Pharmaceutical SciencesUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Brenda M. Gannon
- Department of Pharmacology and ToxicologyUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Narsimha R. Penthala
- Departments of Pharmaceutical SciencesUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Maxim Dobretsov
- Department of AnesthesiologyUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - Peter A. Crooks
- Departments of Pharmaceutical SciencesUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
| | - William E. Fantegrossi
- Department of Pharmacology and ToxicologyUniversity of Arkansas for Medical SciencesLittle RockArkansas72205
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Yadlapalli JSK, Dogra N, Walbaum AW, Prather PL, Crooks PA, Dobretsov M. Preclinical assessment of utility of M6S for multimodal acute and chronic pain treatment in diabetic neuropathy. Life Sci 2018; 192:151-159. [DOI: 10.1016/j.lfs.2017.11.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/17/2017] [Accepted: 11/26/2017] [Indexed: 12/31/2022]
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Yadlapalli JSK, Dogra N, Walbaum AW, Wessinger WD, Prather PL, Crooks PA, Dobretsov M. Evaluation of Analgesia, Tolerance, and the Mechanism of Action of Morphine-6-O-Sulfate Across Multiple Pain Modalities in Sprague-Dawley Rats. Anesth Analg 2017; 125:1021-1031. [PMID: 28489639 PMCID: PMC5561516 DOI: 10.1213/ane.0000000000002006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Morphine-6-O-sulfate (M6S) is a mixed μ/δ-opioid receptor (OR) agonist and potential alternative to morphine for treatment of chronic multimodal pain. METHODS To provide more support for this hypothesis, the antinociceptive effects of M6S and morphine were compared in tests that access a range of pain modalities, including hot plate threshold (HPT), pinprick sensitivity threshold (PST) and paw pressure threshold tests. RESULTS Acutely, M6S was 2- to 3-fold more potent than morphine in HPT and PST tests, specifically, derived from best-fit analysis of dose-response relationships of morphine/M6S half-effective dose (ED50) ratios (lower, upper 95% confidence interval [CI]) were 2.8 (2.0-5.8) in HPT and 2.2 (2.1, 2.4) in PST tests. No differences in analgesic drug potencies were detected in the PPT test (morphine/M6S ED50 ratio 1.2 (95% CI, 0.8-1.4). After 7 to 9 days of chronic treatment, tolerance developed to the antinociceptive effects of morphine, but not to M6S, in all 3 pain tests. Morphine-tolerant rats were not crosstolerant to M6S. The antinociceptive effects of M6S were not sensitive to κ-OR antagonists. However, the δ-OR antagonist, naltrindole, blocked M6S-induced antinociception by 55% ± 4% (95% CI, 39-75) in the HPT test, 94% ± 4% (95% CI, 84-105) in the PST test, and 5% ± 17% (95% CI, -47 to 59) or 51% ± 14% (95% CI, 14-84; 6 rats per each group) in the paw pressure threshold test when examined acutely or after 7 days of chronic treatment, respectively. CONCLUSIONS Activity via δ-ORs thus appears to be an important determinant of M6S action. M6S also exhibited favorable antinociceptive and tolerance profiles compared with morphine in 3 different antinociceptive assays, indicating that M6S may serve as a useful alternative for rotation in morphine-tolerant subjects.
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Affiliation(s)
- Jai Shankar K. Yadlapalli
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, USA 72205
| | - Navdeep Dogra
- Department of Anesthesiology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, USA 72205
| | - Anqi W. Walbaum
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, USA 72205
| | - William D. Wessinger
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, USA 72205
| | - Paul L. Prather
- Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, USA 72205
| | - Peter A. Crooks
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, USA 72205
| | - Maxim Dobretsov
- Department of Anesthesiology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, USA 72205
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Zádor F, Balogh M, Váradi A, Zádori ZS, Király K, Szűcs E, Varga B, Lázár B, Hosztafi S, Riba P, Benyhe S, Fürst S, Al-Khrasani M. 14-O-Methylmorphine: A Novel Selective Mu-Opioid Receptor Agonist with High Efficacy and Affinity. Eur J Pharmacol 2017; 814:264-273. [PMID: 28864212 DOI: 10.1016/j.ejphar.2017.08.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 08/25/2017] [Accepted: 08/28/2017] [Indexed: 12/18/2022]
Abstract
14-O-methyl (14-O-Me) group in morphine-6-O-sulfate (M6SU) or oxymorphone has been reported to be essential for enhanced affinity, potency and antinociceptive effect of these opioids. Herein we report on the pharmacological properties (potency, affinity and efficacy) of the new compound, 14-O-methylmorphine (14-O-MeM) in in vitro. Additionally, we also investigated the antinociceptive effect of the novel compound, as well as its inhibitory action on gastrointestinal transit in in vivo. The potency and efficacy of test compound were measured by [35S]GTPγS binding, isolated mouse vas deferens (MVD) and rat vas deferens (RVD) assays. The affinity of 14-O-MeM for opioid receptors was assessed by radioligand binding and MVD assays. The antinociceptive and gastrointestinal effects of the novel compound were evaluated in the rat tail-flick test and charcoal meal test, respectively. Morphine, DAMGO, Ile5,6 deltorphin II, deltorphin II and U-69593 were used as reference compounds. 14-O-MeM showed higher efficacy (Emax) and potency (EC50) than morphine in MVD, RVD or [35S]GTPγS binding. In addition, 14-O-MeM compared to morphine showed higher affinity for μ-opioid receptor (MOR). In vivo, in rat tail-flick test 14-O-MeM proved to be stronger antinociceptive agent than morphine after peripheral or central administration. Additionally, both compounds inhibited the gastrointestinal peristalsis. However, when the antinociceptive and antitransit doses for each test compound are compared, 14-O-MeM proved to have slightly more favorable pharmacological profile. Our results affirm that 14-O-MeM, an opioid of high efficacy and affinity for MOR can be considered as a novel analgesic agent of potential clinical value.
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Affiliation(s)
- Ferenc Zádor
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Temesvári krt. 62., H- 6726 Szeged, Hungary
| | - Mihály Balogh
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - András Váradi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u., 9. H-1092 Budapest, Hungary
| | - Zoltán S Zádori
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - Kornél Király
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - Edina Szűcs
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Temesvári krt. 62., H- 6726 Szeged, Hungary
| | - Bence Varga
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - Bernadette Lázár
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - Sándor Hosztafi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u., 9. H-1092 Budapest, Hungary
| | - Pál Riba
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - Sándor Benyhe
- Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Temesvári krt. 62., H- 6726 Szeged, Hungary
| | - Susanna Fürst
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary
| | - Mahmoud Al-Khrasani
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Nagyvárad tér 4, P.O. Box 370, H-1445 Budapest, Hungary.
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Yadlapalli JSK, Albayati ZA, Penthala NR, Hendrickson HP, Crooks PA. Stability studies of potent opioid analgesic, morphine-6-O-
sulfate in various buffers and biological matrices by HPLC-DAD analysis. Biomed Chromatogr 2017; 31. [DOI: 10.1002/bmc.3957] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 02/02/2017] [Accepted: 02/12/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Jai Shankar K. Yadlapalli
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock Arkansas USA
| | - Zaineb A.F. Albayati
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock Arkansas USA
| | - Narasimha R. Penthala
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock Arkansas USA
| | - Howard P. Hendrickson
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock Arkansas USA
| | - Peter A. Crooks
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Arkansas for Medical Sciences; Little Rock Arkansas USA
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Yadlapalli JSK, Ford BM, Ketkar A, Wan A, Penthala NR, Eoff RL, Prather PL, Dobretsov M, Crooks PA. Antinociceptive effects of the 6-O-sulfate ester of morphine in normal and diabetic rats: Comparative role of mu- and delta-opioid receptors. Pharmacol Res 2016; 113:335-347. [PMID: 27637375 DOI: 10.1016/j.phrs.2016.09.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 08/30/2016] [Accepted: 09/12/2016] [Indexed: 12/20/2022]
Abstract
This study determined the antinociceptive effects of morphine and morphine-6-O-sulfate (M6S) in both normal and diabetic rats, and evaluated the comparative role of mu-opioid receptors (mu-ORs) and delta-opioid receptors (delta-ORs) in the antinociceptive action of these opioids. In vitro characterization of mu-OR and delta-OR-mediated signaling by M6S and morphine in stably transfected Chinese hamster ovary (CHO-K1) cells showed that M6S exhibited a 6-fold higher affinity for delta-ORs and modulated G-protein and adenylyl cyclase activity via delta-ORs more potently than morphine. Interestingly, while morphine acted as a full agonist at delta-ORs in both functional assays examined, M6S exhibited either partial or full agonist activity for modulation of G-protein or adenylyl cyclase activity, respectively. Molecular docking studies indicated that M6S but not morphine binds equally well at the ligand binding site of both mu- and delta-ORs. In vivo analgesic effects of M6S and morphine in both normal and streptozotocin-induced diabetic Sprague-Dawley rats utilizing the hot water tail flick latency test showed that M6S produced more potent antinociception than morphine in both normal rats and diabetic rats. This difference in potency was abrogated following antagonism of delta- but not mu- or kappa (kappa-ORs) opioid receptors. During 9days of chronic treatment, tolerance developed to morphine-treated but not to M6S-treated rats. Rats that developed tolerance to morphine still remained responsive to M6S. Collectively, this study demonstrates that M6S is a potent and efficacious mu/delta opioid analgesic with a delayed tolerance profile when compared to morphine in both normal and diabetic rats. PERSPECTIVE This study demonstrates that M6S acts at both mu- and delta-ORs, and adds to the growing evidence that the use of mixed mu/delta opioid agonists in pain treatment may have clinical benefit.
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Affiliation(s)
- Jai Shankar K Yadlapalli
- Departments of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Benjamin M Ford
- Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Amit Ketkar
- Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Anqi Wan
- Departments of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Narasimha R Penthala
- Departments of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Robert L Eoff
- Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Paul L Prather
- Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Maxim Dobretsov
- Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Peter A Crooks
- Departments of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
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Lacko E, Riba P, Giricz Z, Varadi A, Cornic L, Balogh M, Kiraly K, Csek K, Mousa SA, Hosztafi S, Schafer M, Zadori ZS, Helyes Z, Ferdinandy P, Furst S, Al-Khrasani M. New Morphine Analogs Produce Peripheral Antinociception within a Certain Dose Range of Their Systemic Administration. ACTA ACUST UNITED AC 2016; 359:171-81. [DOI: 10.1124/jpet.116.233551] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 07/18/2016] [Indexed: 11/22/2022]
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Garrido-Suárez BB, Garrido G, García ME, Delgado-Hernández R. Antihyperalgesic Effects of an Aqueous Stem Bark Extract ofMangifera indicaL.: Role of Mangiferin Isolated from the Extract. Phytother Res 2014; 28:1646-53. [DOI: 10.1002/ptr.5177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 03/28/2014] [Accepted: 04/29/2014] [Indexed: 01/14/2023]
Affiliation(s)
- Bárbara B. Garrido-Suárez
- Laboratorio de Farmacología Molecular; Centro de Investigación y Desarrollo de Medicamentos; Ave. 26 No. 1605, Nuevo Vedado La Habana Cuba
| | - Gabino Garrido
- Departamento de Ciencias Farmacéuticas, Facultad de Ciencias, Edificio Ñ3; Universidad Católica del Norte; Angamos 0610 Antofagasta Chile
| | - Mary Elena García
- Laboratorio de Farmacología Molecular; Centro de Investigación y Desarrollo de Medicamentos; Ave. 26 No. 1605, Nuevo Vedado La Habana Cuba
| | - René Delgado-Hernández
- Laboratorio de Farmacología Molecular; Centro de Investigación y Desarrollo de Medicamentos; Ave. 26 No. 1605, Nuevo Vedado La Habana Cuba
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14
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Mechanisms involved in abdominal nociception induced by either TRPV1 or TRPA1 stimulation of rat peritoneum. Eur J Pharmacol 2013; 714:332-44. [PMID: 23911956 DOI: 10.1016/j.ejphar.2013.07.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 05/21/2013] [Accepted: 07/12/2013] [Indexed: 01/13/2023]
Abstract
Abdominal pain is a frequent symptom of peritoneal cavity irritation, but little is known about the role of the receptors for irritant substances, transient receptor potential vanilloid 1 (TRPV1) and ankyrin 1 (TRPA1), in this painful condition. Thus, we investigated the abdominal nociception caused by peritoneal stimulation with TRPV1 (capsaicin) and TRPA1 (allyl isothiocyanate, AITC) agonists and their mechanisms in rats. The intraperitoneal (i.p.) injection of either capsaicin or AITC (0.03-10 mg/kg) induced short-term (up to 20 min) and dose-dependent abdominal nociception, and also produced c-fos expression in spinal afferents of the dorsal horn. TRPV1 antagonism prevented (94 ± 4% inhibition) nociception induced by capsaicin but not by AITC. In contrast, the TRPA1 antagonism almost abolished AITC-induced nociception (95 ± 2% inhibition) without altering the capsaicin response. Moreover, nociception induced by either capsaicin or AITC was reduced by the desensitisation of TRPV1-positive sensory fibres with resiniferatoxin (73 ± 18 and 76 ± 15% inhibitions, respectively) and by the NK1 receptor antagonist aprepitant (56 ± 5 and 53 ± 8% inhibitions, respectively). Likewise, the i.p. injections of capsaicin or AITC increased the content of substance P in the peritoneal fluid. Nevertheless, neither the mast cell membrane stabiliser cromoglycate, nor the H1 antagonist promethazine, nor depletion of peritoneal macrophages affected abdominal nociception induced either by capsaicin or AITC. Accordingly, neither capsaicin nor AITC increased the histamine content in the peritoneal fluid or provoked peritoneal mast cell degranulation in vitro. Collectively, our findings suggest that TRPV1 and TRPA1 stimulation in the peritoneum produces abdominal nociception that is mediated by sensory fibres activation.
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Abstract
This paper is the thirty-fourth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2011 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 (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, Flushing, NY 11367, United States.
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Wala EP, Crooks PA, McIntosh JM, Holtman JR. Novel small molecule α9α10 nicotinic receptor antagonist prevents and reverses chemotherapy-evoked neuropathic pain in rats. Anesth Analg 2012; 115:713-20. [PMID: 22610850 PMCID: PMC4502964 DOI: 10.1213/ane.0b013e31825a3c72] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Peripheral neuropathy is a common dose-limiting side effect of chemotherapy. There are no clinically proven analgesics for the treatment of this condition. Drugs from different classes have been tested with mixed results. Identification of novel molecular targets for analgesic(s) is important. Antagonism of the α9α10 nicotinic acetylcholine receptor (nAChR) subtype (absent in brain) is thought to underlie analgesic efficacy of peptide α-conotoxins. We found novel nonpeptide small molecule analogs from a family of tetrakis-, tris-, and bis-azaaromatic quaternary ammonium salts (high potency with selectivity as antagonists at the α9α10 nAChRs) to produce dose-related analgesia in rat models of nerve injury-evoked neuropathy and persistent inflammatory pain. No tests were done in a model of neuropathy induced by drug administration (ie, chemotherapy). METHODS In this study, a lead bis-analog, ZZ1-61c, was characterized in a rat model of vincristine-evoked neuropathy. Male Sprague-Dawley rats were repeatedly dosed with the vinca-alkaloid, vincristine (100 μg/kg/day IP, days 1 to 5 and 8 to 12). ZZ1-61c (100 μg/kg/day IP) was given either along with or after completion of vincristine (commencing by day 15 when neuropathy was maximum). Responsiveness was assessed with von Frey hairs and the paw-pressure test. The effects of ZZ1-61c on motor function (rotarod) and muscle strength (grip test) were characterized in naïve rats. RESULTS The development of neuropathy was demonstrated with repeated dosing of vincristine (pain hypersensitivity in response to mechanical stimulation). ZZ1-61c showed both preventive and restorative effects on this condition: (1) vincristine-evoked sensitivity to pressure was reduced by coadministration of ZZ1-61c; (2) established neuropathy was diminished by ZZ1-61c after cessation of chemotherapy. ZZ1-61c did not cause motor dysfunction (rotarod) or muscular weakness (the grip test). CONCLUSIONS This study suggests that ZZ1-61c, a novel compound with a unique mechanism of antagonistic action at the α9α10 nAChR, may be a potential drug candidate for prevention and attenuation of neuropathic pain resulting from chemotherapy. Such a strategy may provide effective treatment that circumvents toxicity of centrally acting agonists at nAChR.
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Affiliation(s)
- Elzbieta P Wala
- Department of Anesthesiology, College of Medicine, University of Kentucky, Lexington, KY 40536-0293, USA.
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Deer TR, Prager J, Levy R, Rathmell J, Buchser E, Burton A, Caraway D, Cousins M, De Andrés J, Diwan S, Erdek M, Grigsby E, Huntoon M, Jacobs MS, Kim P, Kumar K, Leong M, Liem L, McDowell GC, Panchal S, Rauck R, Saulino M, Sitzman BT, Staats P, Stanton-Hicks M, Stearns L, Wallace M, Willis KD, Witt W, Yaksh T, Mekhail N. Polyanalgesic Consensus Conference 2012: recommendations for the management of pain by intrathecal (intraspinal) drug delivery: report of an interdisciplinary expert panel. Neuromodulation 2012; 15:436-64; discussion 464-6. [PMID: 22748024 DOI: 10.1111/j.1525-1403.2012.00476.x] [Citation(s) in RCA: 202] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION The use of intrathecal (IT) infusion of analgesic medications to treat patients with chronic refractory pain has increased since its inception in the 1980s, and the need for clinical research in IT therapy is ongoing. The Polyanalgesic Consensus Conference (PACC) panel of experts convened in 2000, 2003, and 2007 to make recommendations on the rational use of IT analgesics based on preclinical and clinical literature and clinical experiences. METHODS The PACC panel convened again in 2011 to update the standard of care for IT therapies to reflect current knowledge gleaned from literature and clinical experience. A thorough literature search was performed, and information from this search was provided to panel members. Analysis of published literature was coupled with the clinical experience of panel members to form recommendations regarding the use of IT analgesics to treat chronic pain. RESULTS After a review of literature published from 2007 to 2011 and discussions of clinical experience, the panel created updated algorithms for the rational use of IT medications for the treatment of neuropathic pain and nociceptive pain. CONCLUSIONS The advent of new algorithmic tracks for neuropathic and nociceptive pain is an important step in improving patient care. The panel encourages continued research and development, including the development of new drugs, devices, and safety recommendations to improve the care of patients with chronic pain.
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Fields DP, Miranpuri SS, Miranpuri GS, Resnick DK. The multifunctional and multi-system influence of Ghrelin in the treatment of diabetic and spinal cord injury induced Neuropathy. Ann Neurosci 2011; 18:118-22. [PMID: 25205937 PMCID: PMC4116944 DOI: 10.5214/ans.0972.7531.1118309] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2011] [Revised: 06/17/2011] [Accepted: 07/08/2011] [Indexed: 12/05/2022] Open
Abstract
Ghrelin (Gh), a small peptide, which was originally discovered as a gastrointestinal (GI) tropic hormone, has shown to have a presence and function within multiple tissue systems. Recently, Gh has shown to exhibit anti-inflammatory and regenerative abilities in response to both chemical and mechanical stressors within neural tissues. By continuing to elucidate the potential applications of Gh on pathological neural states, the viability of this peptide hormone for therapeutic uses can be explored for future clinical application.
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Affiliation(s)
- DP Fields
- Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - SS Miranpuri
- Department of Orthopedic Surgery, Division of Podiatric Surgery, Detroit Medical Center, Detroit, MI, USA
| | - GS Miranpuri
- Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - DK Resnick
- Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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