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Pintér E, Helyes Z, Szőke É, Bölcskei K, Kecskés A, Pethő G. The triple function of the capsaicin-sensitive sensory neurons: In memoriam János Szolcsányi. Temperature (Austin) 2022; 10:13-34. [PMID: 38059854 PMCID: PMC10177685 DOI: 10.1080/23328940.2022.2147388] [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: 08/31/2022] [Revised: 11/08/2022] [Accepted: 11/08/2022] [Indexed: 11/23/2022] Open
Abstract
This paper is dedicated to the memory of János Szolcsányi (1938-2018), an outstanding Hungarian scientist. Among analgesics that act on pain receptors, he identified capsaicin as a selective lead molecule. He studied the application of capsaicin and revealed several physiological (pain, thermoregulation) and pathophysiological (inflammation, gastric ulcer) mechanisms. He discovered a new neuroregulatory system without sensory efferent reflex and investigated its pharmacology. The authors of this review are his former Ph.D. students who carried out their doctoral work in Szolcsányi's laboratory between 1985 and 2010 and report on the scientific results obtained under his guidance. His research group provided evidence for the triple function of the peptidergic capsaicin-sensitive sensory neurons including classical afferent function, local efferent responses, and remote, hormone-like anti-inflammatory, and antinociceptive actions. They also proposed somatostatin receptor type 4 as a promising drug target for the treatment of pain and inflammation. They revealed that neonatal capsaicin treatment caused no acute neuronal death but instead long-lasting selective ultrastructural and functional changes in B-type sensory neurons, similar to adult treatment. They described that lipid raft disruption diminished the agonist-induced channel opening of the TRPV1, TRPA1, and TRPM8 receptors in native sensory neurons. Szolcsányi's group has developed new devices for noxious heat threshold measurement: an increasing temperature hot plate and water bath. This novel approach proved suitable for assessing the thermal antinociceptive effects of analgesics as well as for analyzing peripheral mechanisms of thermonociception.
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Affiliation(s)
- Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti str. 12, H-7624, Pécs, Hungary
- National Laboratory for Drug Research and Development, Magyar tudósok krt. 2. H-1117Budapest, Hungary
- Eötvös Lorand Research Network, Chronic Pain Research Group, University of Pécs, H7624, Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti str. 12, H-7624, Pécs, Hungary
- National Laboratory for Drug Research and Development, Magyar tudósok krt. 2. H-1117Budapest, Hungary
- Eötvös Lorand Research Network, Chronic Pain Research Group, University of Pécs, H7624, Pécs, Hungary
| | - Éva Szőke
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti str. 12, H-7624, Pécs, Hungary
- National Laboratory for Drug Research and Development, Magyar tudósok krt. 2. H-1117Budapest, Hungary
- Eötvös Lorand Research Network, Chronic Pain Research Group, University of Pécs, H7624, Pécs, Hungary
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti str. 12, H-7624, Pécs, Hungary
| | - Angéla Kecskés
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti str. 12, H-7624, Pécs, Hungary
| | - Gábor Pethő
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Szigeti str. 12, H-7624, Pécs, Hungary
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Rókus Str. 2, H-7624 , Pécs, Hungary
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Asghar A, Aamir MN, Sheikh FA, Ahmad N, Elsherif MA, Abbas Bukhari SN. Co-Combination of Pregabalin and Withaniacoagulans-Extract-Loaded Topical Gel Alleviates Allodynia and Hyperalgesia in the Chronic Sciatic Nerve Constriction Injury for Neuropathic Pain in Animal Model. Molecules 2022; 27:4433. [PMID: 35889307 PMCID: PMC9317976 DOI: 10.3390/molecules27144433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 12/04/2022] Open
Abstract
The current study reports the fabrication of co-combination gel using Pregabalin and Withania coagulans fruit extract to validate its effectiveness for neuropathic pain in chronic constriction injury (CCI) rat models. Three topical gels were prepared using Carbopol 934 through a pseudo-ternary phase diagram incorporating the Pregabalin (2.5%), Withania coagulans extract (2%), and co-combination of both Pregabalin (2.5%) and Withania coagulans extract (2%). Gels were characterized. FTIR showed a successful polymeric network of the gel without any interaction. The drug distribution at the molecular level was confirmed by XRD. The AFM images topographically indicated the rough surface of gels with a size range from 0.25 to 330 nm. DSC showed the disappearance of sharp peaks of the drug and extract, showing successful incorporation into the polymeric network of gels. The in vitro drug release of co-combination gel was 73% over 48 h. The mechanism of drug release by combination gel was Higuchi+ fickian with values of n (0.282) and R2 (0.947). An in vivo study for pain assessment via four methods: (i) heat hyperalgesia, (ii) cold allodynia, (iii) mechano-hyperalgesia, and (iv) dynamic mechano-allodynia, confirmed that topical treatment with co-combination gel reduced the pain significantly as indicated by the p value: R1 (p < 0.001), R2 (p < 0.001), R3 (p < 0.015), and R4 (p < 0.0344). The significance order was R2 (****) > R1 (***) > R3 (**) > R4 (*) > R5 (ns).
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Affiliation(s)
- Anam Asghar
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Punjab 38000, Pakistan;
| | - Muhammad Naeem Aamir
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
- School of Pharmacy, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
| | | | - Naveed Ahmad
- Department of Pharmaceutics, College of Pharmacy, Jouf University, Sakaka 72388, Al Jouf, Saudi Arabia;
| | - Mervat A. Elsherif
- Chemistry Department, College of Science, Jouf University, Sakaka 72388, Al Jouf, Saudi Arabia;
| | - Syed Nasir Abbas Bukhari
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka 72388, Al Jouf, Saudi Arabia;
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Pethő G, Bölcskei K, Füredi R, Botz B, Bagoly T, Pintér E, Szolcsányi J. Evidence for a novel, neurohumoral antinociceptive mechanism mediated by peripheral capsaicin-sensitive nociceptors in conscious rats. Neuropeptides 2017; 62:1-10. [PMID: 28291541 DOI: 10.1016/j.npep.2017.02.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 12/16/2016] [Accepted: 02/07/2017] [Indexed: 11/20/2022]
Abstract
Stimulation of capsaicin-sensitive peripheral sensory nerve terminals induces remote anti-inflammatory effects throughout the body of anesthetized rats and guinea-pigs mediated by somatostatin. As somatostatin has also antinociceptive effects, the study aimed at investigating whether similar remote antinociceptive effects can be demonstrated in awake animals. In conscious rats, nociceptive nerve endings of the right hind paw decentralized by cutting the sciatic and saphenous nerves 18h before were chemically stimulated, and drop of the noxious heat threshold (heat hyperalgesia) induced by prior (18h before) plantar incision was measured on the contralateral, left hind paw using an increasing-temperature water bath. 18h after nerve transection, mustard oil-evoked plasma extravasation was not significantly reduced in the right hind paw as tested by in vivo fluorescence imaging. Applying agonist of either transient receptor potential vanilloid 1 (TRPV1) or transient receptor potential ankyrin 1 (TRPA1) receptor (capsaicin or mustard oil, respectively) to the nerve-transected paw inhibited the plantar incision-induced drop of the noxious heat threshold on the contralateral paw. The onset of these remote antihyperalgesic effects was 10-20min. A similar contralateral inhibitory effect of capsaicin or mustard oil treatment was observed on neuropathic mechanical hyperalgesia evoked by partial sciatic nerve injury 2days before nerve transection and measured by a Randall-Selitto apparatus. The remote thermal antihyperalgesic effect was prevented by chronic (5days) denervation or local capsaicin desensitization of the stimulated paw; reduced by intraperitoneally applied antagonist of somatostatin (cyclosomatostatin) or opioid receptors (naloxone). The response was mimicked by intraperitoneally applied somatostatin and associated with a 72±27% increase in plasma somatostatin-like immunoreactivity that was absent after chronic (5days) denervation. In conclusion, chemical activation of decentralized peripheral capsaicin-sensitive nociceptors evokes remote antihyperalgesic responses initiated outside the central nervous system and mediated by somatostatin and endogenous opioids.
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Affiliation(s)
- Gábor Pethő
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary.
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; Molecular Pharmacology Research Team, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Réka Füredi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Bálint Botz
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; Molecular Pharmacology Research Team, János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Teréz Bagoly
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
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Alsalem M, Altarifi A, Kalbouneh H, Zer HA, Azab B, Salem KE. Role of PPARα and PPARγ in Mediating the Analgesic Properties of Ibuprofen in vivo and the Effects of Dual PPARα/γ Activation in Inflammatory Pain Model in the Rat. INT J PHARMACOL 2016. [DOI: 10.3923/ijp.2016.812.820] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Tékus V, Horváth Á, Hajna Z, Borbély É, Bölcskei K, Boros M, Pintér E, Helyes Z, Pethő G, Szolcsányi J. Noxious heat threshold temperature and pronociceptive effects of allyl isothiocyanate (mustard oil) in TRPV1 or TRPA1 gene-deleted mice. Life Sci 2016; 154:66-74. [DOI: 10.1016/j.lfs.2016.04.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/05/2016] [Accepted: 04/23/2016] [Indexed: 01/18/2023]
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Shehab S, Anwer M, Galani D, Abdulkarim A, Al-Nuaimi K, Al-Baloushi A, Tariq S, Nagelkerke N, Ljubisavljevic M. Anatomical evidence that the uninjured adjacent L4 nerve plays a significant role in the development of peripheral neuropathic pain after L5 spinal nerve ligation in rats. J Comp Neurol 2015; 523:1731-47. [DOI: 10.1002/cne.23750] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/15/2015] [Accepted: 01/18/2015] [Indexed: 12/19/2022]
Affiliation(s)
- Safa Shehab
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Mehwish Anwer
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Divya Galani
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Afaf Abdulkarim
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Khuloud Al-Nuaimi
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Abdullah Al-Baloushi
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Saeed Tariq
- Department of Anatomy, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Nico Nagelkerke
- Department of Community Medicine, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
| | - Milos Ljubisavljevic
- Department of Physiology, College of Medicine and Health Sciences; United Arab Emirates University; Al-Ain UAE
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7
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Boros M, Benkó R, Bölcskei K, Szolcsányi J, Barthó L, Pethő G. Effects of Reference Analgesics and Psychoactive Drugs on the Noxious Heat Threshold of Mice Measured by an Increasing-Temperature Water Bath. Basic Clin Pharmacol Toxicol 2013; 113:385-90. [DOI: 10.1111/bcpt.12119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 07/16/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Melinda Boros
- Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
| | - Rita Benkó
- Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
| | - Kata Bölcskei
- Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
| | - Loránd Barthó
- Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
- Pharmacodynamics Unit; Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
| | - Gábor Pethő
- Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
- Pharmacodynamics Unit; Department of Pharmacology and Pharmacotherapy; University of Pécs; Pécs Hungary
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8
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Effect of Subpressor Dose of Angiotensin II on Pain-Related Behavior in Relation with Neuronal Injury and Activation of Satellite Glial Cells in the Rat Dorsal Root Ganglia. Cell Mol Neurobiol 2013; 33:681-8. [DOI: 10.1007/s10571-013-9934-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 03/25/2013] [Indexed: 01/06/2023]
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9
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Jiang JF, Wang YG, Hu J, Lei F, Kheir MM, Wang XP, Chai YS, Yuan ZY, Lu X, Xing DM, Du F, Du LJ. Novel effect of berberine on thermoregulation in mice model induced by hot and cold environmental stimulation. PLoS One 2013; 8:e54234. [PMID: 23335996 PMCID: PMC3545878 DOI: 10.1371/journal.pone.0054234] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 12/10/2012] [Indexed: 12/17/2022] Open
Abstract
The purpose of this study was to assess the effects of berberine (BBR) on thermoregulation in mice exposed to hot (40°C) and cold (4°C) environmental conditions. Four groups of mice were assembled with three different dosages of BBR (0.2, 0.4, and 0.8 mg/kg) and normal saline (control). In room temperature, our largest dosage of BBR (0.8 mg/kg) can reduce rectal temperatures (Tc) of normal mice. In hot conditions, BBR can antagonize the increasing core body temperature and inhibit the expression of HSP70 and TNFα in mice; conversely, in cold conditions, BBR can antagonize the decreasing core body temperature and enhance the expression of TRPM8. This study demonstrates the dual ability of BBR in maintaining thermal balance, which is of great relevance to the regulation of HSP70, TNFα and TRPM8.
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Affiliation(s)
- Jing-Fei Jiang
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Yu-Gang Wang
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Jun Hu
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Fan Lei
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Michael M. Kheir
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Xin-Pei Wang
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Yu-Shuang Chai
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Zhi-Yi Yuan
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Xi Lu
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Dong-Ming Xing
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
| | - Feng Du
- Department of Mathematics, Tulane University, New Orleans, Louisiana, United States of America
| | - Li-Jun Du
- Protein Science Laboratory of the Ministry of Education, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences and School of Medicine, Tsinghua University, Beijing, China
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Petho G, Reeh PW. Sensory and signaling mechanisms of bradykinin, eicosanoids, platelet-activating factor, and nitric oxide in peripheral nociceptors. Physiol Rev 2013; 92:1699-775. [PMID: 23073630 DOI: 10.1152/physrev.00048.2010] [Citation(s) in RCA: 191] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Peripheral mediators can contribute to the development and maintenance of inflammatory and neuropathic pain and its concomitants (hyperalgesia and allodynia) via two mechanisms. Activation or excitation by these substances of nociceptive nerve endings or fibers implicates generation of action potentials which then travel to the central nervous system and may induce pain sensation. Sensitization of nociceptors refers to their increased responsiveness to either thermal, mechanical, or chemical stimuli that may be translated to corresponding hyperalgesias. This review aims to give an account of the excitatory and sensitizing actions of inflammatory mediators including bradykinin, prostaglandins, thromboxanes, leukotrienes, platelet-activating factor, and nitric oxide on nociceptive primary afferent neurons. Manifestations, receptor molecules, and intracellular signaling mechanisms of the effects of these mediators are discussed in detail. With regard to signaling, most data reported have been obtained from transfected nonneuronal cells and somata of cultured sensory neurons as these structures are more accessible to direct study of sensory and signal transduction. The peripheral processes of sensory neurons, where painful stimuli actually affect the nociceptors in vivo, show marked differences with respect to biophysics, ultrastructure, and equipment with receptors and ion channels compared with cellular models. Therefore, an effort was made to highlight signaling mechanisms for which supporting data from molecular, cellular, and behavioral models are consistent with findings that reflect properties of peripheral nociceptive nerve endings. Identified molecular elements of these signaling pathways may serve as validated targets for development of novel types of analgesic drugs.
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Affiliation(s)
- Gábor Petho
- Pharmacodynamics Unit, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Pécs, Hungary
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12
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Alshahrani S, Fernandez-Conti F, Araujo A, DiFulvio M. Rapid determination of the thermal nociceptive threshold in diabetic rats. J Vis Exp 2012:e3785. [PMID: 22643870 PMCID: PMC3466937 DOI: 10.3791/3785] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Painful diabetic neuropathy (PDN) is characterized by hyperalgesia i.e., increased sensitivity to noxious stimulus, and allodynia i.e., hypersensitivity to normally innocuous stimuli. Hyperalgesia and allodynia have been studied in many different rodent models of diabetes mellitus. However, as stated by Bölcskei et al, determination of "pain" in animal models is challenging due to its subjective nature. Moreover, the traditional methods used to determine behavioral responses to noxious thermal stimuli usually lack reproducibility and pharmacological sensitivity. For instance, by using the hot-plate method of Ankier, flinch, withdrawal and/or licking of either hind- and/or fore-paws is quantified as reflex latencies at constant high thermal stimuli (52-55 °C). However, animals that are hyperalgesic to thermal stimulus do not reproducibly show differences in reflex latencies using those supra-threshold temperatures. As the recently described method of Bölcskei et al., the procedures described here allows for the rapid, sensitive and reproducible determination of thermal nociceptive thresholds (TNTs) in mice and rats. The method uses slowly increasing thermal stimulus applied mostly to the skin of mouse/rat plantar surface. The method is particularly sensitive to study anti-nociception during hyperalgesic states such as PDN. The procedures described bellow are based on the ones published in detail by Almási et al and Bölcskei et al. The procedures described here have been approved the Laboratory Animal Care and Use Committee (LACUC), Wright State University.
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Affiliation(s)
- Saeed Alshahrani
- Department of Pharmacology and Toxicology, Wright State University
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13
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Im KS, Jung HJ, Kim JB, Lee JM, Park HJ, Joo CH, Moon DE. The antinociceptive effect of acetaminophen in a rat model of neuropathic pain. Kaohsiung J Med Sci 2012; 28:251-8. [PMID: 22531303 DOI: 10.1016/j.kjms.2011.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 08/11/2011] [Indexed: 10/28/2022] Open
Abstract
Acetaminophen is one of the most popular and widely used analgesics for the treatment of pain and fever but few studies have evaluated its effects on neuropathic pain. This study examined the effect of acetaminophen on thermal hyperalgesia, mechanical and cold allodynia in a rat model of neuropathic pain. Male Sprague-Dawley rats were prepared by tightly ligating the left L5 and L6 spinal nerves to produce a model of neuropathic pain. Sixty neuropathic rats were assigned randomly into six groups. Normal saline and acetaminophen (25, 50, 100, 200 and 300 mg/kg) were administered intraperitoneally to these individual groups. Thermal hyperalgesia, mechanical and cold allodynia were examined at preadministration and at 15, 30, 60, 90, 120, 180, 240 and 360 min after administering the drug. Mechanical allodynia was quantified by measuring the paw withdrawal threshold to stimuli with von Frey filaments. Cold allodynia was quantified by measuring the frequency of foot lift after applying 100% acetone. Thermal hyperalgesia was quantified by measuring the thermal withdrawal threshold. The rotarod performance was measured to detect any drug-induced adverse effects, such as drowsiness. The hepatic and renal adverse effect was also assessed by measuring the serum levels of aspartate aminotransferase, alanine aminotransferase, blood urea nitrogen and creatinine. The paw withdrawal thresholds to mechanical stimuli and the thermal withdrawal threshold were increased significantly and withdrawal frequencies to cold stimuli were reduced by acetaminophen administration in a dose-dependent manner. Acetaminophen reduces thermal hyperalgesia, mechanical and cold allodynia in a rat model of neuropathic pain, and might be useful for managing neuropathic pain.
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Affiliation(s)
- Kyong-Shil Im
- Department of Anesthesiology and Pain Medicine, School of Medicine, The Catholic University of Korea, Seoul, South Korea
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Thibault K, Calvino B, Pezetl S. Characterisation of sensory abnormalities observed in an animal model of multiple sclerosis: A behavioural and pharmacological study. Eur J Pain 2012; 15:231.e1-16. [DOI: 10.1016/j.ejpain.2010.07.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 06/17/2010] [Accepted: 07/12/2010] [Indexed: 10/19/2022]
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15
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Markovics A, Szoke É, Sándor K, Börzsei R, Bagoly T, Kemény Á, Elekes K, Pintér E, Szolcsányi J, Helyes Z. Comparison of the anti-inflammatory and anti-nociceptive effects of cortistatin-14 and somatostatin-14 in distinct in vitro and in vivo model systems. J Mol Neurosci 2011; 46:40-50. [PMID: 21695504 DOI: 10.1007/s12031-011-9577-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 06/08/2011] [Indexed: 10/18/2022]
Abstract
We showed that somatostatin (SST) exerts anti-inflammatory and anti-nociceptive effects through somatostatin receptor subtypes 4 and 1 (sst(4)/sst(1)). Since cortistatin (CST) is a structurally similar peptide, we aimed at comparing the sst(1)- and sst(4)-binding and activating abilities, as well as the effects of SST-14 and CST-14 on inflammatory and nociceptive processes. CST-14 concentration-dependently displaced radiolabeled SST-14 binding, induced similar sst(1) and sst(4)-activation with a less potency, and exerted significantly greater inhibitory effect on endotoxin-stimulated interleukin (IL)-1β production of murine peritoneal macrophages. Capsaicin-induced calcitonin gene-related peptide release from peripheral sensory nerve terminals of isolated rat tracheae was significantly decreased by 2 μM CST and 100 nM SST, but concentration-response correlation was not found. Mustard oil-evoked acute neurogenic plasma protein extravasation in the rat hindpaw skin, carrageenan-induced mouse paw edema, mechanical hyperalgesia, and IL-1β, tumor necrosis factor-α production, as well as mild heat injury-evoked thermal hyperalgesia were similarly attenuated by both peptides. In the latter case, i.pl. and i.p. injections exerted equal inhibitory actions. CST-14 and SST-14 similarly diminish both acute neurogenic and cellular inflammatory processes, as well as mechanical and heat hyperalgesia, in which their inhibitory effect on sensory nerve endings is likely to be involved. However, CST-14 exerts remarkably greater inhibition on cytokine production.
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Affiliation(s)
- Adrienn Markovics
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Szigeti str. 12, 7624, Pécs, Hungary
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Toussaint K, Yang XC, Zielinski MA, Reigle KL, Sacavage SD, Nagar S, Raffa RB. What do we (not) know about how paracetamol (acetaminophen) works? J Clin Pharm Ther 2011; 35:617-38. [PMID: 21054454 DOI: 10.1111/j.1365-2710.2009.01143.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
WHAT IS KNOWN AND BACKGROUND Although paracetamol (acetaminophen), N-(4-Hydroxyphenyl)acetamide, is one of the world's most widely used analgesics, the mechanism by which it produces its analgesic effect is largely unknown. This lack is relevant because: (i) optimal pain treatment matches the analgesic mechanism to the (patho)physiology of the pain and (ii) modern drug discovery relies on an appropriate screening assay. OBJECTIVE To review the clinical profile and preclinical studies of paracetamol as means of gaining insight into its mechanism of analgesic action. METHODS A literature search was conducted of clinical and preclinical literature and the information obtained was organized and reviewed from the perspective of its contribution to an understanding of the mechanism of analgesic action of paracetamol. RESULTS Paracetamol's broad spectrum of analgesic and other pharmacological actions is presented, along with its multiple postulated mechanism(s) of action. No one mechanism has been definitively shown to account for its analgesic activity. WHAT IS NEW AND CONCLUSION Further research is needed to uncover the mechanism of analgesic action of paracetamol. The lack of this knowledge affects optimal clinical use and impedes drug discovery efforts.
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Affiliation(s)
- K Toussaint
- Temple University School of Pharmacy, Philadelphia, PA 19140, USA
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Effect of transient receptor potential vanilloid 1 (TRPV1) receptor antagonist compounds SB705498, BCTC and AMG9810 in rat models of thermal hyperalgesia measured with an increasing-temperature water bath. Eur J Pharmacol 2010; 641:135-41. [DOI: 10.1016/j.ejphar.2010.05.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 04/19/2010] [Accepted: 05/23/2010] [Indexed: 11/19/2022]
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Fu YS, Wang PH, Liu SP, Huang WH, Huang HT. Warm SPA-induced hyperthermia confers protection to rats against airway inflammation evoked by capsaicin and substance P. Auton Neurosci 2010; 155:49-58. [DOI: 10.1016/j.autneu.2010.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 12/13/2009] [Accepted: 01/11/2010] [Indexed: 11/16/2022]
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Bölcskei K, Petho G, Szolcsányi J. Noxious heat threshold measured with slowly increasing temperatures: novel rat thermal hyperalgesia models. Methods Mol Biol 2010; 617:57-66. [PMID: 20336413 DOI: 10.1007/978-1-60327-323-7_5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The conventional methods for the study of thermal pain in animals apply constant suprathreshold heat stimuli and measure the reflex latency of pain-avoiding reactions. The latency measured by these methods may greatly vary upon repeated measurements which is a major disadvantage concerning reliability. The presently introduced novel approach involves applying a slowly increasing thermal stimulus which allows determination of the noxious heat threshold i.e. the lowest temperature evoking pain-avoiding behaviour. An increasing-temperature hot plate and an increasing-temperature water bath are presented which are both suitable to determine the noxious heat threshold with high reproducibility. Acute thermal hyperalgesia models based on the drop of the heat threshold are also described for each equipment which proved to be highly sensitive to standard analgesics.
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Affiliation(s)
- Kata Bölcskei
- Analgesic Research Laboratory, University of Pécs, Gedeon Richter Plc, Pécs, Hungary
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Füredi R, Bölcskei K, Szolcsányi J, Petho G. Comparison of the peripheral mediator background of heat injury- and plantar incision-induced drop of the noxious heat threshold in the rat. Life Sci 2009; 86:244-50. [PMID: 20036261 DOI: 10.1016/j.lfs.2009.12.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 11/05/2009] [Accepted: 12/06/2009] [Indexed: 11/24/2022]
Abstract
AIMS Previously we described the drop of the noxious heat threshold in response to mild heat injury or plantar incision. While mild heat injury elicits an immediate and short-lasting thermal hyperalgesia, surgical incision leads to a delayed and sustained heat hyperalgesia. Only very few peripheral mediators of these phenomena have been identified. Therefore the present study aimed at comparing the peripheral mediator background of heat hyperalgesia evoked by mild heat injury or surgical incision. MAIN METHODS Heat hyperalgesia was assessed by measuring the behavioural noxious heat threshold in conscious rats employing an increasing-temperature water bath. KEY FINDINGS The heat threshold drop evoked by a mild heat injury and measured 10min afterwards was reduced by intraplantarly applied HOE 140, a bradykinin B(2) receptor antagonist, NDGA, a non-selective lipoxygenase inhibitor, L-NOARG, a non-selective nitric oxide synthase inhibitor, TNP-ATP, a P2X purinoceptor antagonist and AMG9810, an antagonist of the transient receptor potential vanilloid type 1 (TRPV1) receptor. The heat threshold drop evoked by plantar incision and measured 18h later was reduced by intraplantarly applied HOE 140, [des-Arg(10)]-HOE 140, a bradykinin B(1) receptor antagonist, L-NOARG, TNP-ATP and the TRPV1 receptor antagonist SB-366791. SIGNIFICANCE Only small differences have been revealed between the examined peripheral mediators of the acute heat hyperalgesia evoked by mild heat injury and the sustained increase in heat responsiveness induced by surgical incision. The B(2) and B(1) bradykinin receptor, P2X purinoceptors, TRPV1 receptor, nitric oxide synthase and lipoxygenase(s) are involved in at least one of these hyperalgesia models.
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Affiliation(s)
- Réka Füredi
- Department of Pharmacology and Pharmacotherapy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
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Effects of analgesics on the plantar incision-induced drop of the noxious heat threshold measured with an increasing-temperature water bath in the rat. Eur J Pharmacol 2009; 605:63-7. [DOI: 10.1016/j.ejphar.2008.12.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2008] [Revised: 12/03/2008] [Accepted: 12/18/2008] [Indexed: 11/17/2022]
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Gregoretti C, Decaroli D, Piacevoli Q, Mistretta A, Barzaghi N, Luxardo N, Tosetti I, Tedeschi L, Burbi L, Navalesi P, Azzeri F. Analgo-sedation of patients with burns outside the operating room. Drugs 2009; 68:2427-43. [PMID: 19016572 DOI: 10.2165/0003495-200868170-00003] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Following the initial resuscitation of burn patients, the pain experienced may be divided into a 'background' pain and a 'breakthrough' pain associated with painful procedures. While background pain may be treated with intravenous opioids via continuous infusion or patient-controlled analgesia (PCA) and/or less potent oral opioids, breakthrough pain may be treated with a variety of interventions. The aim is to reduce patient anxiety, improve analgesia and ensure immobilization when required. Untreated pain and improper sedation may result in psychological distress such as post-traumatic stress disorder, major depression or delirium. This review summarizes recent developments and current techniques in sedation and analgesia in non-intubated adult burn patients during painful procedures performed outside the operating room (e.g. staple removal, wound-dressing, bathing). Current techniques of sedation and analgesia include different approaches, from a slight increase in background pain therapy (e.g. morphine PCA) to PCA with rapid-onset opioids, to multimodal drug combinations, nitrous oxide, regional blocks, or non-pharmacological approaches such as hypnosis and virtual reality. The most reliable way to administer drugs is intravenously. Fast-acting opioids can be combined with ketamine, propofol or benzodiazepines. Adjuvant drugs such as clonidine or NSAIDs and paracetamol (acetaminophen) have also been used. Patients receiving ketamine will usually maintain spontaneous breathing. This is an important feature in patients who are continuously turned during wound dressing procedures and where analgo-sedation is often performed by practitioners who are not specialists in anaesthesiology. Drugs are given in small boluses or by patient-controlled sedation, which is titrated to effect, according to sedation and pain scales. Patient-controlled infusion with propofol has also been used. However, we must bear in mind that burn patients often show an altered pharmacokinetic and pharmacodynamic response to drugs as a result of altered haemodynamics, protein binding and/or increased extracellular fluid volume, and possible changes in glomerular filtration. Because sedation and analgesia can range from minimal sedation (anxiolysis) to general anaesthesia, sedative and analgesic agents should always be administered by designated trained practitioners and not by the person performing the procedure. At least one individual who is capable of establishing a patent airway and positive pressure ventilation, as well as someone who can call for additional assistance, should always be present whenever analgo-sedation is administered. Oxygen should be routinely delivered during sedation. Blood pressure and continuous ECG monitoring should be carried out whenever possible, even if a patient is undergoing bathing or other procedures that may limit monitoring of vital pulse-oximetry parameters.
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Affiliation(s)
- Cesare Gregoretti
- Intensive Care Unit, Azienda Ospedaliera CTO-CRF-ICORMA, Turin, Italy
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Sándor K, Bölcskei K, McDougall JJ, Schuelert N, Reglődi D, Elekes K, Pethő G, Pintér E, Szolcsányi J, Helyes Z. Divergent peripheral effects of pituitary adenylate cyclase-activating polypeptide-38 on nociception in rats and mice. Pain 2009; 141:143-50. [DOI: 10.1016/j.pain.2008.10.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2008] [Revised: 10/11/2008] [Accepted: 10/30/2008] [Indexed: 01/11/2023]
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Abstract
This paper is the thirtieth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2007 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, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.
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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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Current World Literature. Curr Opin Anaesthesiol 2008; 21:811-3. [DOI: 10.1097/aco.0b013e32831ced3b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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