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Khasabova IA, Khasabov SG, Johns M, Juliette J, Zheng A, Morgan H, Flippen A, Allen K, Golovko MY, Golovko SA, Zhang W, Marti J, Cain D, Seybold VS, Simone DA. Exosome-associated lysophosphatidic acid signaling contributes to cancer pain. Pain 2023; 164:2684-2695. [PMID: 37278638 PMCID: PMC10652716 DOI: 10.1097/j.pain.0000000000002967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 06/07/2023]
Abstract
ABSTRACT Pain associated with bone cancer remains poorly managed, and chemotherapeutic drugs used to treat cancer usually increase pain. The discovery of dual-acting drugs that reduce cancer and produce analgesia is an optimal approach. The mechanisms underlying bone cancer pain involve interactions between cancer cells and nociceptive neurons. We demonstrated that fibrosarcoma cells express high levels of autotaxin (ATX), the enzyme synthetizing lysophosphatidic acid (LPA). Lysophosphatidic acid increased proliferation of fibrosarcoma cells in vitro. Lysophosphatidic acid is also a pain-signaling molecule, which activates LPA receptors (LPARs) located on nociceptive neurons and satellite cells in dorsal root ganglia. We therefore investigated the contribution of the ATX-LPA-LPAR signaling to pain in a mouse model of bone cancer pain in which fibrosarcoma cells are implanted into and around the calcaneus bone, resulting in tumor growth and hypersensitivity. LPA was elevated in serum of tumor-bearing mice, and blockade of ATX or LPAR reduced tumor-evoked hypersensitivity. Because cancer cell-secreted exosomes contribute to hypersensitivity and ATX is bound to exosomes, we determined the role of exosome-associated ATX-LPA-LPAR signaling in hypersensitivity produced by cancer exosomes. Intraplantar injection of cancer exosomes into naive mice produced hypersensitivity by sensitizing C-fiber nociceptors. Inhibition of ATX or blockade of LPAR attenuated cancer exosome-evoked hypersensitivity in an ATX-LPA-LPAR-dependent manner. Parallel in vitro studies revealed the involvement of ATX-LPA-LPAR signaling in direct sensitization of dorsal root ganglion neurons by cancer exosomes. Thus, our study identified a cancer exosome-mediated pathway, which may represent a therapeutic target for treating tumor growth and pain in patients with bone cancer.
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Affiliation(s)
- Iryna A. Khasabova
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Sergey G. Khasabov
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Malcolm Johns
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Joe Juliette
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Aunika Zheng
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Hannah Morgan
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Alyssa Flippen
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Kaje Allen
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Mikhail Y. Golovko
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND, United States
| | - Svetlana A. Golovko
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND, United States
| | - Wei Zhang
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
- MNC, College of Science and Engineering, University of Minnesota, Minneapolis, MN, United States
| | - James Marti
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, United States
| | - David Cain
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
| | - Virginia S. Seybold
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, United States
| | - Donald A. Simone
- Department of Diagnostic and Biological Sciences, University of Minnesota, Minneapolis, MN, United States
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Quirion B, Beaulieu C, Côté L, Parent JL, Gendron L. Distribution of delta and mu opioid receptor mRNA in rodent dorsal root ganglia neurons. Eur J Neurosci 2022; 56:4031-4044. [PMID: 35674691 PMCID: PMC9543299 DOI: 10.1111/ejn.15733] [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: 09/15/2021] [Revised: 05/24/2022] [Accepted: 06/02/2022] [Indexed: 12/01/2022]
Abstract
Primary afferents are responsible for transmitting signals produced by noxious stimuli from the periphery to the spinal cord. Mu and delta opioid receptors (MOP and DOP) have analgesic properties and are highly expressed in dorsal root ganglia (DRG) neurons. In humans, spinal DOP is almost exclusively located on central terminals of DRG neurons, whereas in rodents, it is expressed both on presynaptic terminals and spinal neurons. In this study, we aimed to assess the distribution of MOP and DOP in the DRGs of mice and rats. Using in situ hybridization and immunofluorescence, we visualized MOP and DOP mRNA together with various neuronal markers. In rats and mice, we show that both receptors are expressed, albeit to different extents, in all types of neurons, namely, large and medium myelinated neurons (NF200-positive), small nonpeptidergic (IB4- or P2X3R-positive) and peptidergic C fibres (Tac1-positive). Overall, DOP mRNA was found to be mainly expressed in large and medium myelinated neurons, whereas MOP mRNA was mainly found in C fibres. The distribution of MOP and DOP, however, slightly differs between rats and mice, with a higher proportion of small nonpeptidergic C fibres expressing DOP mRNA in mice than in rats. We further found that neither morphine nor inflammation affected the distribution of the receptor mRNA. Because of their location, our results confirm that MOP and DOP have the potential to alleviate similar types of pain and that this effect could slightly differ between species.
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Affiliation(s)
- Béatrice Quirion
- Département de Pharmacologie-Physiologie, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Claudie Beaulieu
- Département de Pharmacologie-Physiologie, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Laurie Côté
- Département de Pharmacologie-Physiologie, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Département de Médecine, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Jean-Luc Parent
- Département de Médecine, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Louis Gendron
- Département de Pharmacologie-Physiologie, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Institut de Pharmacologie de Sherbrooke, Centre de Recherche du CHUS, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Quebec Pain Research Network
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Griffith JI, Kim M, Bruce DJ, Peterson CD, Kitto KF, Mohammad AS, Rathi S, Fairbanks CA, Wilcox GL, Elmquist WF. Central Nervous System Distribution of an Opioid Agonist Combination with Synergistic Activity. J Pharmacol Exp Ther 2022; 380:34-46. [PMID: 34663676 PMCID: PMC8969136 DOI: 10.1124/jpet.121.000821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/14/2021] [Indexed: 01/03/2023] Open
Abstract
Novel combinations of specific opioid agonists like loperamide and oxymorphindole targeting the µ- and δ-opioid receptors, respectively, have shown increased potency with minimized opioid-associated risks. However, whether their interaction is pharmacokinetic or pharmacodynamic in nature has not been determined. This study quantitatively determined whether these drugs have a pharmacokinetic interaction that alters systemic disposition or central nervous system (CNS) distribution. We performed intravenous and oral in vivo pharmacokinetic assessments of both drugs after discrete dosing and administration in combination to determine whether the combination had any effect on systemic pharmacokinetic parameters or CNS exposure. Drugs were administered at 5 or 10 mg/kg i.v. or 30 mg/kg orally to institute for cancer research (ICR) mice and 5 mg/kg i.v. to Friend leukemia virus strain B mice of the following genotypes: wild-type, breast cancer resistance protein (Bcrp-/- ) (Bcrp knockout), Mdr1a/b-/- [P-glycoprotein (P-gp) knockout], and Bcrp-/- Mdr1a/b-/- (triple knockout). In the combination, clearance of oxymorphindole (OMI) was reduced by approximately half, and the plasma area under the concentration-time curve (AUC) increased. Consequently, brain and spinal cord AUCs for OMI in the combination also increased proportionately. Both loperamide and OMI are P-gp substrates, but administration of the two drugs in combination does not alter efflux transport at the CNS barriers. Because OMI alone shows appreciable brain penetration but little therapeutic efficacy on its own, and because loperamide's CNS distribution is unchanged in the combination, the mechanism of action for the increased potency of the combination is most likely pharmacodynamic and most likely occurs at receptors in the peripheral nervous system. This combination has favorable characteristics for future development. SIGNIFICANCE STATEMENT: Opioids have yet to be replaced as the most effective treatments for moderate-to-severe pain and chronic pain, but their side effects are dangerous. Combinations of opioids with peripheral activity, such as loperamide and oxymorphindole, would be valuable in that they are effective at much lower doses and have reduced risks for dangerous side effects because the µ-opioid receptor agonist is largely excluded from the CNS.
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Affiliation(s)
- Jessica I Griffith
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Minjee Kim
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Daniel J Bruce
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Cristina D Peterson
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Kelley F Kitto
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Afroz S Mohammad
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Sneha Rathi
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - Carolyn A Fairbanks
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - George L Wilcox
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
| | - William F Elmquist
- Brain Barriers Research Center (J.I.G., M.K., A.S.M., S.R., W.F.E.), Department of Pharmaceutics (J.I.G., M.K., A.S.M., S.R., C.A.F., W.F.E.), Department of Pharmacology (D.J.B., C.A.F., G.L.W.), Department of Neuroscience (C.D.P., K.F.K., C.A.F., G.L.W.), and Department of Dermatology (G.L.W.), University of Minnesota, Minneapolis Elmquist Laboratory, Minneapolis, Minnesota
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Topical Treatments and Their Molecular/Cellular Mechanisms in Patients with Peripheral Neuropathic Pain-Narrative Review. Pharmaceutics 2021; 13:pharmaceutics13040450. [PMID: 33810493 PMCID: PMC8067282 DOI: 10.3390/pharmaceutics13040450] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/17/2021] [Accepted: 03/22/2021] [Indexed: 12/25/2022] Open
Abstract
Neuropathic pain in humans results from an injury or disease of the somatosensory nervous system at the peripheral or central level. Despite the considerable progress in pain management methods made to date, peripheral neuropathic pain significantly impacts patients' quality of life, as pharmacological and non-pharmacological methods often fail or induce side effects. Topical treatments are gaining popularity in the management of peripheral neuropathic pain, due to excellent safety profiles and preferences. Moreover, topical treatments applied locally may target the underlying mechanisms of peripheral sensitization and pain. Recent studies showed that peripheral sensitization results from interactions between neuronal and non-neuronal cells, with numerous signaling molecules and molecular/cellular targets involved. This narrative review discusses the molecular/cellular mechanisms of drugs available in topical formulations utilized in clinical practice and their effectiveness in clinical studies in patients with peripheral neuropathic pain. We searched PubMed for papers published from 1 January 1995 to 30 November 2020. The key search phrases for identifying potentially relevant articles were "topical AND pain", "topical AND neuropathic", "topical AND treatment", "topical AND mechanism", "peripheral neuropathic", and "mechanism". The result of our search was 23 randomized controlled trials (RCT), 9 open-label studies, 16 retrospective studies, 20 case (series) reports, 8 systematic reviews, 66 narrative reviews, and 140 experimental studies. The data from preclinical studies revealed that active compounds of topical treatments exert multiple mechanisms of action, directly or indirectly modulating ion channels, receptors, proteins, and enzymes expressed by neuronal and non-neuronal cells, and thus contributing to antinociception. However, which mechanisms and the extent to which the mechanisms contribute to pain relief observed in humans remain unclear. The evidence from RCTs and reviews supports 5% lidocaine patches, 8% capsaicin patches, and botulinum toxin A injections as effective treatments in patients with peripheral neuropathic pain. In turn, single RCTs support evidence of doxepin, funapide, diclofenac, baclofen, clonidine, loperamide, and cannabidiol in neuropathic pain states. Topical administration of phenytoin, ambroxol, and prazosin is supported by observational clinical studies. For topical amitriptyline, menthol, and gabapentin, evidence comes from case reports and case series. For topical ketamine and baclofen, data supporting their effectiveness are provided by both single RCTs and case series. The discussed data from clinical studies and observations support the usefulness of topical treatments in neuropathic pain management. This review may help clinicians in making decisions regarding whether and which topical treatment may be a beneficial option, particularly in frail patients not tolerating systemic pharmacotherapy.
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