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Kuhne S, Wijtmans M, Lim HD, Leurs R, de Esch IJP. Several down, a few to go: histamine H3 receptor ligands making the final push towards the market? Expert Opin Investig Drugs 2011; 20:1629-48. [PMID: 21992603 DOI: 10.1517/13543784.2011.625010] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION The histamine H(3) receptor (H(3)R) plays a pivotal role in a plethora of therapeutic areas. Blocking the H(3)R with antagonists/inverse agonists has been postulated to be of broad therapeutic use. Indeed, H(3)R antagonists/inverse agonists have been extensively evaluated in the clinic. AREAS COVERED Here, we address new developments, insights obtained and challenges encountered in the clinical evaluations. For recent H(3)R clinical candidates, the status and results of the corresponding clinical trial(s) will be discussed along with preclinical data. MAIN FINDINGS In all, it becomes evident that clinical evaluation of H(3)R antagonists/inverse agonists is characterized by mixed results. On one hand, Pitolisant has successfully passed several Phase II trials and seems to be the most advanced compound in the clinic now, being in Phase III. On the other hand, some compounds (e.g., PF-03654647 and MK-0249) failed at Phase II clinical level for several indications. EXPERT OPINION A challenging feature in H(3)R research is the multifaceted role of the receptor at a molecular/biochemical level, which can complicate targeting by small molecules at several (pre)clinical levels. Accordingly, H(3)R antagonists/inverse agonists require further testing to pinpoint the determinants for clinical efficacy and to aid in the final push towards the market.
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Affiliation(s)
- Sebastiaan Kuhne
- VU University Amsterdam, Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Department of Pharmacochemistry, Faculty of Exact Sciences, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
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Zhang GH, Lv MM, Wang S, Chen L, Qian NS, Tang Y, Zhang XD, Ren PC, Gao CJ, Sun XD, Xu LX. Spinal astrocytic activation is involved in a virally-induced rat model of neuropathic pain. PLoS One 2011; 6:e23059. [PMID: 21969850 PMCID: PMC3182161 DOI: 10.1371/journal.pone.0023059] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 07/11/2011] [Indexed: 12/31/2022] Open
Abstract
Postherpetic neuralgia (PHN), the most common complication of herpes zoster (HZ), plays a major role in decreased life quality of HZ patients. However, the neural mechanisms underlying PHN remain unclear. Here, using a PHN rat model at 2 weeks after varicella zoster virus infection, we found that spinal astrocytes were dramatically activated. The mechanical allodynia and spinal central sensitization were significantly attenuated by intrathecally injected L-α-aminoadipate (astrocytic specific inhibitor) whereas minocycline (microglial specific inhibitor) had no effect, which indicated that spinal astrocyte but not microglia contributed to the chronic pain in PHN rat. Further study was taken to investigate the molecular mechanism of astrocyte-incudced allodynia in PHN rat at post-infection 2 weeks. Results showed that nitric oxide (NO) produced by inducible nitric oxide synthase mediated the development of spinal astrocytic activation, and activated astrocytes dramatically increased interleukin-1β expression which induced N-methyl-D-aspartic acid receptor (NMDAR) phosphorylation in spinal dorsal horn neurons to strengthen pain transmission. Taken together, these results suggest that spinal activated astrocytes may be one of the most important factors in the pathophysiology of PHN and “NO-Astrocyte-Cytokine-NMDAR-Neuron” pathway may be the detailed neural mechanisms underlying PHN. Thus, inhibiting spinal astrocytic activation may represent a novel therapeutic strategy for clinical management of PHN.
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Affiliation(s)
- Gui-He Zhang
- Department of Anesthesiology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, People's Republic of China
- Department of Anesthesiology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Miao-Miao Lv
- Department of Anesthesiology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Shuang Wang
- Central Laboratory, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Lei Chen
- Department of Gynecology and Obstetrics, Naval General Hospital, Beijing, People's Republic of China
| | - Nian-Song Qian
- Department of Hepatobiliary Surgery, PLA General Hospital, Beijing, People's Republic of China
| | - Yu Tang
- Department of Ultrasound, PLA 302 Hospital, Beijing, People's Republic of China
| | - Xu-Dong Zhang
- Department of Orthopaedics, Tangdu Hospital, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Peng-Cheng Ren
- Department of Orthopaedics, Tangdu Hospital, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Chang-Jun Gao
- Department of Anesthesiology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, People's Republic of China
- * E-mail: (C-JG) (CG); (X-DS) (XS); (L-XX) (LX)
| | - Xu-De Sun
- Department of Anesthesiology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, People's Republic of China
- * E-mail: (C-JG) (CG); (X-DS) (XS); (L-XX) (LX)
| | - Li-Xian Xu
- Department of Anesthesiology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
- * E-mail: (C-JG) (CG); (X-DS) (XS); (L-XX) (LX)
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Champion S, Gross J, Robichaud AJ, Pimlott S. Radiosynthesis of 123I-labelled benzimidazoles as novel single-photon emission computed tomography tracers for the histamine H3 receptor. J Labelled Comp Radiopharm 2011. [DOI: 10.1002/jlcr.1899] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sue Champion
- Institute of Neuroscience and Psychology; University of Glasgow; West of Scotland Radionuclide Dispensary, Western Infirmary; Glasgow; G11 6NT; UK
| | - Jonathan Gross
- Wyeth Research Chemical Sciences; Princeton; NJ; 08551; USA
| | | | - Sally Pimlott
- School of Medicine; University of Glasgow; Glasgow; UK
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van Diest SA, Stanisor OI, Boeckxstaens GE, de Jonge WJ, van den Wijngaard RM. Relevance of mast cell-nerve interactions in intestinal nociception. Biochim Biophys Acta Mol Basis Dis 2011; 1822:74-84. [PMID: 21496484 DOI: 10.1016/j.bbadis.2011.03.019] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2011] [Revised: 03/11/2011] [Accepted: 03/30/2011] [Indexed: 01/06/2023]
Abstract
Cross-talk between the immune- and nervous-system is considered an important biological process in health and disease. Because mast cells are often strategically placed between nerves and surrounding (immune)-cells they may function as important intermediate cells. This review summarizes the current knowledge on bidirectional interaction between mast cells and nerves and its possible relevance in (inflammation-induced) increased nociception. Our main focus is on mast cell mediators involved in sensitization of TRP channels, thereby contributing to nociception, as well as neuron-released neuropeptides and their effects on mast cell activation. Furthermore we discuss mechanisms involved in physical mast cell-nerve interactions. This article is part of a Special Issue entitled: Mast cells in inflammation.
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Affiliation(s)
- Sophie A van Diest
- Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, The Netherlands.
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55
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Leurs R, Vischer HF, Wijtmans M, de Esch IJ. En route to new blockbuster anti-histamines: surveying the offspring of the expanding histamine receptor family. Trends Pharmacol Sci 2011; 32:250-7. [DOI: 10.1016/j.tips.2011.02.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 02/07/2011] [Accepted: 02/07/2011] [Indexed: 11/27/2022]
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56
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Altenbach RJ, Black LA, Strakhova MI, Manelli AM, Carr TL, Marsh KC, Wetter JM, Wensink EJ, Hsieh GC, Honore P, Garrison TR, Brioni JD, Cowart MD. Diaryldiamines with dual inhibition of the histamine H(3) receptor and the norepinephrine transporter and the efficacy of 4-(3-(methylamino)-1-phenylpropyl)-6-(2-(pyrrolidin-1-yl)ethoxy)naphthalen-1-ol in pain. J Med Chem 2010; 53:7869-73. [PMID: 20945906 DOI: 10.1021/jm100666w] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of compounds was designed as dual inhibitors of the H(3) receptor and the norepinephrine transporter. Compound 5 (rNET K(i) = 14 nM; rH(3)R K(i) = 37 nM) was found to be efficacious in a rat model of osteoarthritic pain.
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Affiliation(s)
- Robert J Altenbach
- Neuroscience Research, Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064-6100, United States.
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57
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Tiligada E, Kyriakidis K, Chazot PL, Passani MB. Histamine pharmacology and new CNS drug targets. CNS Neurosci Ther 2010; 17:620-8. [PMID: 22070192 DOI: 10.1111/j.1755-5949.2010.00212.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
During the last decade, the identification of a number of novel drug targets led to the development of promising new compounds which are currently under evaluation for their therapeutic prospective in CNS related disorders. Besides the established pleiotropic regulatory functions in the periphery, the interest in the potential homeostatic role of histamine in the brain was revived following the identification of H(3) and H(4) receptors some years ago. Complementing classical CNS pharmacology, the development of selective histamine receptor agonists, antagonists, and inverse agonists provides the lead for the potential exploitation of the histaminergic system in the treatment of brain pathologies. Although no CNS disease entity has been associated directly to brain histamine dysfunction until now, the H(3) receptor is recognized as a drug target for neuropathic pain, sleep-wake disorders, including narcolepsy, and cognitive impairment associated with attention deficit hyperactivity disorder, schizophrenia, Alzheimer's, or Parkinson's disease, while the first H(3) receptor ligands have already entered phase I-III clinical trials. Interestingly, the localization of the immunomodulatory H(4) receptor in the nervous system exposes attractive perspectives for the therapeutic exploitation of this new drug target in neuroimmunopharmacology. This review focuses on a concise presentation of the current "translational research" approach that exploits the latest advances in histamine pharmacology for the development of beneficial drug targets for the treatment of neuronal disorders, such as neuropathic pain, cognitive, and sleep-wake pathologies. Furthermore, the role of the brain histaminergic system(s) in neuroprotection and neuroimmunology/inflammation remains a challenging research area that is currently under consideration.
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Affiliation(s)
- Ekaterini Tiligada
- Department of Pharmacology, Medical School University of Athens, Athens, Greece.
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58
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Berlin M, Boyce CW, de Lera Ruiz M. Histamine H3 Receptor as a Drug Discovery Target. J Med Chem 2010; 54:26-53. [DOI: 10.1021/jm100064d] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Michael Berlin
- Chemical Research, Merck Research Laboratories, 2015 Galloping Hill Road, Kenilworth, New Jersey 07033, United States
| | - Christopher W. Boyce
- Chemical Research, Merck Research Laboratories, 2015 Galloping Hill Road, Kenilworth, New Jersey 07033, United States
| | - Manuel de Lera Ruiz
- Chemical Research, Merck Research Laboratories, 2015 Galloping Hill Road, Kenilworth, New Jersey 07033, United States
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59
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Davidson S, Giesler GJ. The multiple pathways for itch and their interactions with pain. Trends Neurosci 2010; 33:550-8. [PMID: 21056479 DOI: 10.1016/j.tins.2010.09.002] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 09/03/2010] [Accepted: 09/10/2010] [Indexed: 12/12/2022]
Abstract
Multiple neural pathways and molecular mechanisms responsible for producing the sensation of itch have recently been identified, including histamine-independent pathways. Physiological, molecular, behavioral and brain imaging studies are converging on a description of these pathways and their close association with pain processing. Some conflicting results have arisen and the precise relationship between itch and pain remains controversial. A better understanding of the generation of itch and of the intrinsic mechanisms that inhibit itch after scratching should facilitate the search for new methods to alleviate clinical pruritus (itch). In this review we describe the current understanding of the production and inhibition of itch. A model of itch processing within the CNS is proposed.
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Affiliation(s)
- Steve Davidson
- Pain Center and Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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60
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Hsieh GC, Honore P, Pai M, Wensink EJ, Chandran P, Salyers AK, Wetter JM, Zhao C, Liu H, Decker MW, Esbenshade TA, Cowart MD, Brioni JD. Antinociceptive effects of histamine H3 receptor antagonist in the preclinical models of pain in rats and the involvement of central noradrenergic systems. Brain Res 2010; 1354:74-84. [DOI: 10.1016/j.brainres.2010.07.083] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2009] [Revised: 07/21/2010] [Accepted: 07/23/2010] [Indexed: 01/07/2023]
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61
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Hough LB, Rice FL. H3 receptors and pain modulation: peripheral, spinal, and brain interactions. J Pharmacol Exp Ther 2010; 336:30-7. [PMID: 20864501 DOI: 10.1124/jpet.110.171264] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Histamine H(3) receptors (H(3)Rs), distributed within the brain, the spinal cord, and on specific types of primary sensory neurons, can modulate pain transmission by several mechanisms. In the skin, H(3)Rs are found on certain Aβ fibers, and on keratinocytes and Merkel cells, as well as on deep dermal, peptidergic Aδ fibers terminating on deep dermal blood vessels. Activation of H(3)Rs on the latter in the skin, heart, lung, and dura mater reduces calcitonin gene-related peptide and substance P release, leading to anti-inflammatory (but not antinociceptive) actions. However, activation of H(3)Rs on the spinal terminals of these sensory fibers reduces nociceptive responding to low-intensity mechanical stimuli and inflammatory stimuli such as formalin. These findings suggest that H(3)R agonists might be useful analgesics, but these drugs have not been tested in clinically relevant pain models. Paradoxically, H(3) antagonists/inverse agonists have also been reported to attenuate several types of pain responses, including phase II responses to formalin. In the periaqueductal gray (an important pain regulatory center), the H(3) inverse agonist thioperamide releases neuronal histamine and mimics histamine's biphasic modulatory effects in thermal nociceptive tests. Newer H(3) inverse agonists with potent, selective, and brain-penetrating properties show efficacy in several neuropathic and arthritis pain models, but the sites and mechanisms for these actions remain poorly understood.
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Affiliation(s)
- Lindsay B Hough
- Center for Neuropharmacology and Neuroscience, Albany Medical College, Albany, NY 12208, USA.
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62
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Łażewska D, Kieć-Kononowicz K. Recent advances in histamine H3receptor antagonists/inverse agonists. Expert Opin Ther Pat 2010; 20:1147-69. [DOI: 10.1517/13543776.2010.509346] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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63
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Yuan H, Zhu X, Zhou S, Chen Q, Zhu X, Ma X, He X, Tian M, Shi X. Role of mast cell activation in inducing microglial cells to release neurotrophin. J Neurosci Res 2010; 88:1348-54. [PMID: 20025063 DOI: 10.1002/jnr.22304] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The brain-derived neurotrophic factor (BDNF) plays a critical role in pain hypersensitivity. BDNF is the ligand of P2X4 receptors (P2X4R) in the microglia. The causative factors involving the P2X4R over expression in the microglia remains unclear. Mast cell activation has a close relation with pain hypersensitivity. However, the underlying mechanism between mast cell activation and pain hypersensitivity is unknown. The present study aimed to elucidate the mechanism by which mast cell activation promoted the expression of P2X4R in the microglia. The results of present study showed that mast cell activation markedly promoted the expression of P2X4R and BDNF in microglial cells, which significantly enhanced the release of BDNF from microglial cells upon exposure to adenosine triphosphate. Mast cell-derived tryptase activated PAR2 that resulted in promoting the expression of P2X4R in microglial cells. Pretreatment with antibodies against tryptase or PAR2, or using tryptase-deficient HMC-1 cells or PAR2-deficient microglial cells abolished the increase in P2X4R expression and BDNF release. Increase in mitogen activated protein kinase phosphorylation was observed in the processes of mast cell-induced BDNF release and P2X4R expression. We conclude that mast cell activation has the capacity to promote the expression of P2X4R and BDNF in microglial cells.
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Affiliation(s)
- Hongbin Yuan
- Department of Anesthesiology, Changzheng Hospital, the Second Military Medical University, Shanghai, China
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64
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Abstract
Inoculation of rodents with varicella-zoster virus (VZV) results in a latent infection in dorsal root ganglia with expression of at least five of the six VZV transcripts and one of the viral proteins that are reported to be expressed during latency in human ganglia. Rats develop allodynia and hyperalgesia in the limb distal to the site of injection and the resulting exaggerated withdrawal response to stimuli is reduced by treatment with gabapentin and amitryptyline, but not by antiviral therapy. Inoculation of rats with VZV mutants show that most viral genes are dispensable for latency, but that some genes (e.g., ORF4, 29, and ORF63) that are expressed during latency are important for the establishment of latency in rodents, but not for infection of rodent ganglia. The rodent model for VZV latency allows one to study ganglia removed immediately after death, avoiding the possibility of reactivation, and helps to identify VZV genes required for latency.
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Affiliation(s)
- Jeffrey I Cohen
- Laboratory of Clinical Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
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65
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Histamine potentiates acid-induced responses mediating transient receptor potential V1 in mouse primary sensory neurons. Neuroscience 2009; 166:292-304. [PMID: 20006972 DOI: 10.1016/j.neuroscience.2009.12.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Revised: 11/27/2009] [Accepted: 12/01/2009] [Indexed: 01/06/2023]
Abstract
In inflamed tissues, extracellular pH decreases and acidosis is an important source of pain. Histamine is released from mast cells under inflammatory conditions and evokes the pain sensation in vivo, but the cellular mechanism of histamine-induced pain has not been well understood. In the present study, we examined the effects of histamine on [Ca(2+)](i) and membrane potential responses to acid in isolated mouse dorsal root ganglion (DRG) neurons. In capsaicin-sensitive DRG neurons from wild-type mice, acid (>pH 5.0) evoked [Ca(2+)](i) increases, but not in DRG neurons from transient receptor potential V1 (TRPV1) (-/-) mice. Regardless of isolectin GS-IB4 (IB4)-staining, histamine potentiated [Ca(2+)](i) responses to acid (>or=pH 6.0) that were mediated by TRPV1 activation. Histamine increased membrane depolarization induced by acid and evoked spike discharges. RT-PCR indicated the expression of all four histamine receptors (H1R, H2R, H3R, H4R) in mouse DRG. The potentiating effect of histamine was mimicked by an H1R agonist, but not H2R-H4R agonists and was inhibited only by an H1R antagonist. Histamine failed to potentiate the [Ca(2+)](i) response to acid in the presence of inhibitors for phospholipase C (PLC) and protein kinase C (PKC). A lipoxygenase inhibitor and protein kinase A inhibitor did not affect the potentiating effects of histamine. Carrageenan and complete Freund's adjuvant produced inflammatory hyperalgesia, but these inflammatory conditions did not change the potentiating effects of histamine in DRG neurons. The present results suggest that histamine sensitizes acid-induced responses through TRPV1 activation via H1R coupled with PLC/PKC pathways, the action of which may be involved in the generation of inflammatory pain.
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66
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Le S, Finn JP, Larijani ME, Marino MJ, Schaffhauser H. Detection of low level histamine H3 receptor occupancy by autoradiography. J Neurosci Methods 2009; 185:70-5. [DOI: 10.1016/j.jneumeth.2009.09.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/03/2009] [Accepted: 09/08/2009] [Indexed: 10/20/2022]
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67
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Tiligada E, Zampeli E, Sander K, Stark H. Histamine H3and H4receptors as novel drug targets. Expert Opin Investig Drugs 2009; 18:1519-31. [DOI: 10.1517/14728220903188438] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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68
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Mobarakeh JI, Takahashi K, Yanai K. Enhanced morphine-induced antinociception in histamine H3 receptor gene knockout mice. Neuropharmacology 2009; 57:409-14. [DOI: 10.1016/j.neuropharm.2009.06.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 06/27/2009] [Accepted: 06/29/2009] [Indexed: 11/29/2022]
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69
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Célanire S, Wijtmans M, Christophe B, Collart P, de Esch I, Dassesse D, Delaunoy C, Denonne F, Durieu V, Gelens E, Gillard M, Lallemand B, Lamberty Y, Lebon F, Nicolas JM, Quéré L, Snip E, Vanbellinghen A, Van houtvin N, Verbois V, Timmerman H, Talaga P, Leurs R, Provins L. Discovery of a New Class of Non-imidazole Oxazoline-Based Histamine H3Receptor (H3R) Inverse Agonists. ChemMedChem 2009; 4:1063-8. [DOI: 10.1002/cmdc.200900055] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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70
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Guo RX, Anaclet C, Roberts JC, Parmentier R, Zhang M, Guidon G, Buda C, Sastre JP, Feng JQ, Franco P, Brown SH, Upton N, Medhurst AD, Lin JS. Differential effects of acute and repeat dosing with the H3 antagonist GSK189254 on the sleep-wake cycle and narcoleptic episodes in Ox-/- mice. Br J Pharmacol 2009; 157:104-17. [PMID: 19413575 DOI: 10.1111/j.1476-5381.2009.00205.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Histamine H3 receptor antagonists are currently being evaluated in clinical trials for a number of central nervous system disorders including narcolepsy. These agents can increase wakefulness (W) in cats and rodents following acute administration, but their effects after repeat dosing have not been reported previously. EXPERIMENTAL APPROACH EEG and EMG recordings were used to investigate the effects of acute and repeat administration of the novel H3 antagonist GSK189254 on the sleep-wake cycle in wild-type (Ox+/+) and orexin knockout (Ox-/-) mice, the latter being genetically susceptible to narcoleptic episodes. In addition, we investigated H3 and H1 receptor expression in this model using radioligand binding and autoradiography. KEY RESULTS In Ox+/+ and Ox-/- mice, acute administration of GSK189254 (3 and 10 mg x kg(-1) p.o.) increased W and decreased slow wave and paradoxical sleep to a similar degree to modafinil (64 mg x kg(-1)), while it reduced narcoleptic episodes in Ox-/- mice. After twice daily dosing for 8 days, the effect of GSK189254 (10 mg x kg(-1)) on W in both Ox+/+ and Ox-/- mice was significantly reduced, while the effect on narcoleptic episodes in Ox-/- mice was significantly increased. Binding studies revealed no significant differences in H3 or H1 receptor expression between Ox+/+ and Ox-/- mice. CONCLUSIONS AND IMPLICATIONS These studies provide further evidence to support the potential use of H3 antagonists in the treatment of narcolepsy and excessive daytime sleepiness. Moreover, the differential effects observed on W and narcoleptic episodes following repeat dosing could have important implications in clinical studies.
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Affiliation(s)
- R X Guo
- INSERM/UCBL-U628, Integrated Physiology of Brain Arousal Systems, Department of Experimental Medicine, Faculty of Medicine, Claude Bernard University, Lyon Cedex, France
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71
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Sander K, Kottke T, Stark H. Histamine H3 Receptor Antagonists Go to Clinics. Biol Pharm Bull 2008; 31:2163-81. [DOI: 10.1248/bpb.31.2163] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kerstin Sander
- Johann Wolfgang Goethe-Universität Frankfurt am Main, Institut für Pharmazeutische Chemie
| | - Tim Kottke
- Johann Wolfgang Goethe-Universität Frankfurt am Main, Institut für Pharmazeutische Chemie
| | - Holger Stark
- Johann Wolfgang Goethe-Universität Frankfurt am Main, Institut für Pharmazeutische Chemie
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