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Xi C, He L, Huang Z, Zhang J, Zou K, Guo Q, Huang C. Combined metabolomics and transcriptomics analysis of rats under neuropathic pain and pain-related depression. Front Pharmacol 2023; 14:1320419. [PMID: 38143492 PMCID: PMC10739318 DOI: 10.3389/fphar.2023.1320419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 11/29/2023] [Indexed: 12/26/2023] Open
Abstract
Neuropathic pain often leads to negative emotions, which in turn can enhance the sensation of pain. This study aimed to investigate the molecular mechanisms mediating neuropathic pain and negative emotions. Chronic constriction injury (CCI) rats were used as model animals and behavioral tests were conducted to assess pain and negative emotions. Then, the rat anterior cingulate cortex (ACC) was analyzed using UPLC-MS/MS and subsequently integrated with our previously published transcriptome data. Metabolomics analysis revealed that 68 differentially expressed metabolites (DEMs) were identified, mainly in amino acid metabolites and fatty acyls. Combined with our previously published transcriptome data, we predicted two genes that potentially exhibited associations with these metabolites, respectively Apolipoprotein L domain containing 1 (Apold1) and WAP four-disulfide core domain 1 (Wfdc1). Taken together, our results indicated that peripheral nerve injury contributing to neuropathic pain and pain-related depression may be associated with these metabolites and genes. This research provides new insights into the molecular regulatory mechanism, which could serve as a reference for the treatment of neuropathic pain and pain-related depression.
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Affiliation(s)
- Caiyun Xi
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
| | - Liqiong He
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhifeng Huang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
| | - Jianxi Zhang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
| | - Kailu Zou
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
| | - Qulian Guo
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Changsheng Huang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
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2
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Obara K, Kawaguchi A, Inaba R, Kawakita M, Yamaguchi R, Yamashita H, Xu K, Ou G, Yamaki F, Yoshioka K, Tanaka Y. Docosahexaenoic Acid and Eicosapentaenoic Acid Inhibit the Contractile Responses of the Guinea Pig Lower Gastrointestinal Tract. Biol Pharm Bull 2021; 44:1129-1139. [PMID: 34334498 DOI: 10.1248/bpb.b21-00362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) are n-3 polyunsaturated fatty acids (PUFAs), and are abundant in fish oil. These n-3 PUFAs have been reported to improve the lower gastrointestinal (LGI) disorders such as ulcerative colitis and Crohn's disease through their anti-inflammatory effects. However, there are few studies on the effect of n-3 PUFAs on motility of the LGI tract, such as the ileum and colon, the parts frequently affected by these inflammatory disorders. To elucidate the effects of DHA and EPA on the LGI tract motility, we performed comparative evaluation of their effects and linoleic acid (LA), an n-6 PUFA, on contractions in the ileal and colonic longitudinal smooth muscles (LSMs) isolated from guinea pigs. In the ileal and colonic LSMs, DHA and EPA (3 × 10-5 M each) significantly inhibited contractions induced by acetylcholine (ACh), histamine, and prostaglandin (PG) F2α (vs. control), and these effects are stronger than that of LA (3 × 10-5 M). In the colonic LSMs, DHA and EPA also significantly inhibited contractions induced by PGD2 (vs. control). In addition, DHA and EPA significantly inhibited CaCl2-induced ileal and colonic LSM contractions in Ca2+-free 80 mM-KCl solution (vs. control). Any ileal and colonic LSM contractions induced by ACh, histamine, PGF2α, and CaCl2 were completely suppressed by verapamil (10-5 M), a voltage-gated/dependent Ca2+ channel (VGCC/VDCC) inhibitor. These findings suggest that DHA and EPA could improve the abnormal contractile functions of the LGI tract associated with inflammatory diseases, partly through inhibition of VGCC/VDCC-dependent ileal and colonic LSM contractions.
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Affiliation(s)
- Keisuke Obara
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Ayana Kawaguchi
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Rikako Inaba
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Mirai Kawakita
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Rika Yamaguchi
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Haruna Yamashita
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Keyue Xu
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Guanghan Ou
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Fumiko Yamaki
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University.,Department of Pharmacy, Faculty of Pharmacy, Musashino University
| | - Kento Yoshioka
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
| | - Yoshio Tanaka
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University
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Kiso T, Watabiki T, Sekizawa T. ASP8477, a fatty acid amide hydrolase inhibitor, exerts analgesic effects in rat models of neuropathic and dysfunctional pain. Eur J Pharmacol 2020; 881:173194. [DOI: 10.1016/j.ejphar.2020.173194] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 05/08/2020] [Accepted: 05/11/2020] [Indexed: 12/29/2022]
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Ausmees K, Ehrlich-Peets K, Vallas M, Veskioja A, Rammul K, Rehema A, Zilmer M, Songisepp E, Kullisaar T. Fermented whey-based product improves the quality of life of males with moderate lower urinary tract symptoms: A randomized double-blind study. PLoS One 2018; 13:e0191640. [PMID: 29474361 PMCID: PMC5825006 DOI: 10.1371/journal.pone.0191640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 11/30/2017] [Indexed: 11/18/2022] Open
Abstract
PURPOSE The purpose of this research was to evaluate the effect of a specific fermented whey product on lower urinary tract symptoms, main prostate related indices and oxidative stress/inflammatory markers in urine and seminal plasma in men with moderate dysuric symptoms. An additional purpose was to clarify associations between different parameters with special emphasis on pain. METHODS This was a prospective randomized double-blind 4-weeks study on men with moderate lower urinary tract symptoms who underwent the evaluation for quality of life at the baseline and at the end of the study. The symptoms were characterized by International Prostate Symptom Score (I-PSS) and National Institutes of Health Chronic Prostatitis Symptom Index (NIH-PSI), the maximum urinary flow and the main prostate-related indices. In order to obtain more comprehensive information about the effects of fermented whey product on systemic oxidative stress marker 8-EPI and seminal plasma inflammatory markers (interleukin-6 and interleukin-8) were also measured. RESULTS After 4 weeks consumption of fermented whey product there was a statistically significant decrease of prostate-specific antigen level in serum and systemic stress marker 8-EPI in urine compared to control group. Maximum urinary flow and NIH-PSI all studied scores and sub-scores had also significant improvement. In addition, seminal plasma interleukin-8 level substantially decreased. CONCLUSIONS The consumption of special fermented whey product improved urinary function, reduced lower urinary tract symptoms, systemic oxidative stress marker and seminal plasma inflammatory status. Thus it contributed to an improvement of the quality of life in men with moderate lower urinary tract symptoms.
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Affiliation(s)
| | - Kersti Ehrlich-Peets
- BioCC LLC, Tartu, Estonia
- Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia
| | | | | | | | - Aune Rehema
- Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Mihkel Zilmer
- Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia
| | | | - Tiiu Kullisaar
- Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia
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Okuyama T, Nakatake R, Kaibori M, Okumura T, Kon M, Nishizawa M. A sense oligonucleotide to inducible nitric oxide synthase mRNA increases the survival rate of rats in septic shock. Nitric Oxide 2017; 72:32-40. [PMID: 29128398 DOI: 10.1016/j.niox.2017.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 10/04/2017] [Accepted: 11/07/2017] [Indexed: 12/28/2022]
Abstract
Natural antisense transcripts (asRNAs) that do not encode proteins are transcribed from rat, mouse, and human genes, encoding inducible nitric oxide synthase (iNOS), which catalyzes the production of the inflammatory mediator nitric oxide (NO). In septic shock, NO is excessively produced in hepatocytes and macrophages. The iNOS asRNA interacts with and stabilizes iNOS mRNA. We found that single-stranded 'sense' oligonucleotides corresponding to the iNOS mRNA sequence reduced iNOS mRNA levels by interfering with the mRNA-asRNA interactions in rat hepatocytes. The iNOS sense oligonucleotides that were substituted with phosphorothioate bonds and locked nucleic acids efficiently decreased the levels of iNOS mRNA and iNOS protein. In this study, the gene expression patterns in the livers of two endotoxemia model rats with acute liver failure were compared. Next, we optimized the sequence and modification of the iNOS sense oligonucleotides in interleukin 1β-treated rat hepatocytes. When a sense oligonucleotide was simultaneously administered with d-galactosamine and bacterial lipopolysaccharide (LPS) to rats, their survival rate significantly increased compared to the rats administered d-galactosamine and LPS alone. In the livers of the sense oligonucleotide-administered rats, apoptosis in the hepatocytes markedly decreased. These results suggest that natural antisense transcript-targeted regulation technology using iNOS sense oligonucleotides may be used to treat human inflammatory diseases, such as sepsis and septic shock.
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Affiliation(s)
- Tetsuya Okuyama
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Richi Nakatake
- Department of Surgery, Kansai Medical University, Hirakata, Osaka, Japan
| | - Masaki Kaibori
- Department of Surgery, Kansai Medical University, Hirakata, Osaka, Japan
| | - Tadayoshi Okumura
- Department of Surgery, Kansai Medical University, Hirakata, Osaka, Japan; Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Masanori Kon
- Department of Surgery, Kansai Medical University, Hirakata, Osaka, Japan
| | - Mikio Nishizawa
- Department of Biomedical Sciences, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan.
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Murai N, Hiyama H, Kiso T, Sekizawa T, Watabiki T, Oka H, Aoki T. Analgesic effects of novel lysophosphatidic acid receptor 5 antagonist AS2717638 in rodents. Neuropharmacology 2017; 126:97-107. [PMID: 28859883 DOI: 10.1016/j.neuropharm.2017.08.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/19/2017] [Accepted: 08/25/2017] [Indexed: 01/17/2023]
Abstract
Lysophosphatidic acid (LPA) is a bioactive lipid that acts via at least six G protein-coupled receptors, LPA receptors 1-6 (LPA1-6), for various physiological functions. We examined (1) whether LPA5 is involved in pain signaling in the spinal cord; and (2) the pharmacological effects of a novel LPA5 antagonist on intrathecal prostaglandin (PG)- and (S)-α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-induced allodynia, and neuropathic and inflammatory pain in rodents. Intrathecal injection of a selective LPA5 agonist, geranylgeranyl diphosphate, and a non-selective agonist, LPA, induced allodynia in wild type, but not in LPA5 knockout mice. These novel results suggest that LPA5 is important for pain signal transmission in the spinal cord. AS2717638 (6,7-dimethoxy-2-(5-methyl-1,2-benzoxazol-3-yl)-4-(piperidin-1-ylcarbonyl)isoquinolin-1(2H)-one) bound to the LPA-binding site on LPA5 and selectively inhibited LPA-induced cyclic adenosine monophosphate accumulation in human LPA5-but not LPA1-, 2-, or 3-expressing cells. Further, oral administration of AS2717638 inhibited LPA5 agonist-induced allodynia in mice. AS2717638 also significantly improved PGE2-, PGF2α-, and AMPA-induced allodynia, while both pregabalin and duloxetine alleviated only PGE2-induced allodynia in mice. Similarly, AS2717638 significantly ameliorated static mechanical allodynia and thermal hyperalgesia in rat models of chronic constriction injury (CCI)-induced neuropathic pain. AS2717638 also showed analgesic effects in a rat model of inflammatory pain. These findings suggest that LPA5 antagonists elicit broad analgesic effects against both neuropathic and inflammatory pain. Accordingly, pharmacological LPA5 antagonists are attractive development candidates for potential novel pain therapies.
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Affiliation(s)
- Nobuhito Murai
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan.
| | - Hideki Hiyama
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Tetsuo Kiso
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Toshihiro Sekizawa
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Tomonari Watabiki
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Hiromasa Oka
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Toshiaki Aoki
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
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Tu NH, Katano T, Matsumura S, Pham VM, Muratani T, Minami T, Ito S. Role of c-Jun N-terminal kinase in late nerve regeneration monitored byin vivoimaging of thy1-yellow fluorescent protein transgenic mice. Eur J Neurosci 2016; 43:548-60. [DOI: 10.1111/ejn.13139] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/05/2015] [Accepted: 11/19/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Nguyen H. Tu
- Department of Medical Chemistry; Kansai Medical University; 2-5-1 Shin-machi Hirakata 573-1010 Japan
| | - Tayo Katano
- Department of Medical Chemistry; Kansai Medical University; 2-5-1 Shin-machi Hirakata 573-1010 Japan
| | - Shinji Matsumura
- Department of Medical Chemistry; Kansai Medical University; 2-5-1 Shin-machi Hirakata 573-1010 Japan
| | - Vuong Minh Pham
- Department of Medical Chemistry; Kansai Medical University; 2-5-1 Shin-machi Hirakata 573-1010 Japan
| | | | - Toshiaki Minami
- Department of Anesthesiology; Osaka Medical College; Takatsuki Japan
| | - Seiji Ito
- Department of Medical Chemistry; Kansai Medical University; 2-5-1 Shin-machi Hirakata 573-1010 Japan
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8
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Murai N, Tsukamoto M, Tamura S, Aoki T, Matsuoka N. Antinociceptive effects of AS1069562, the (+)-isomer of indeloxazine, on spinal hypersensitivity induced by intrathecal injection of prostaglandin in mice: Comparison with duloxetine and amitriptyline. Eur J Pharmacol 2014; 733:54-61. [DOI: 10.1016/j.ejphar.2014.03.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 02/25/2014] [Accepted: 03/16/2014] [Indexed: 10/25/2022]
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Rörsch F, Buscató E, Deckmann K, Schneider G, Schubert-Zsilavecz M, Geisslinger G, Proschak E, Grösch S. Structure-activity relationship of nonacidic quinazolinone inhibitors of human microsomal prostaglandin synthase 1 (mPGES 1). J Med Chem 2012; 55:3792-803. [PMID: 22449023 DOI: 10.1021/jm201687d] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Microsomal prostaglandin E synthase 1 (mPGES-1) is a key enzyme of the arachidonic acid cascade. Its product PGE(2) plays an important role in various inflammatory processes, pain, fever, and cancer. Selective inhibition of mPGES-1 might be a promising step to avoid cyclooxygenase-related effects of NSAIDs. We studied a class of quinazolinone derivatives of the lead structure FR20 for their effects on the isolated human and murine enzymes, human HeLa cells, and in various settings of the whole blood assay. Novel compounds with direct enzyme inhibiting activity in the submicromolar range (IC(50): 0.13-0.37 μM) were designed using a bioisosteric replacement strategy and proved to be effective in both cells and human whole blood. Furthermore, pharmacological profiling of toxicity and eicosanoid screening with LC/MS-MS was applied to characterize this new class of mPGES-1 inhibitors.
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Affiliation(s)
- Florian Rörsch
- Johann Wolfgang Goethe-University, Institute of Clinical Pharmacology, pharmazentrum frankfurt, LiFF/ZAFES, Theodor-Stern-Kai 7, D-60590 Frankfurt/Main, Germany.
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10
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Are prostatitis symptoms associated with an isoprostane-mediated vicious circle? Med Hypotheses 2011; 77:837-40. [DOI: 10.1016/j.mehy.2011.07.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 07/15/2011] [Accepted: 07/19/2011] [Indexed: 01/21/2023]
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11
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Antonova M, Wienecke T, Olesen J, Ashina M. Pro-inflammatory and vasoconstricting prostanoid PGF2α causes no headache in man. Cephalalgia 2011; 31:1532-41. [DOI: 10.1177/0333102411423314] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: During two decades of migraine provocation studies with naturally occurring signalling molecules, vasodilators such as prostaglandin E2, prostaglandin I2 (prostacyclin) and prostaglandin D2 were shown to be able to induce headache in man. To elucidate the role of inflammation and vasodilatation in the generation of headache, we investigated whether the pro-inflammatory and vasoconstricting prostanoid prostaglandin F2α (PGF2α) would cause headache in a human model of headache. Methods: Twelve healthy volunteers were randomly allocated to receive 3.5 µg/kg/min PGF2α or placebo over 20 min in a two-way crossover study. We recorded headache intensity on a verbal rating scale, middle cerebral artery blood flow velocity (VMCA) and the diameters of the superficial temporal artery (STA) and radial artery (RA). Results: We found no difference in the area under the curve (AUC) for immediate headache (0–90 min) between PGF2α and placebo ( p = 0.144). The McNemar's test showed no difference in the incidence of immediate and delayed headache between verum and placebo ( p = 0.500 and p = 1.000, respectively). There was no difference in VMCA ( p = 0.776) and in the diameter of the STA ( p = 0.460) or RA ( p = 0.780) between PGF2α and placebo. Conclusion: The present study shows that PGF2α, unlike vasodilating prostaglandins, does not provoke headache. We suggest that the vasodilating abilities of prostaglandins are important for the induction of experimental headache in healthy volunteers.
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Woodward DF, Jones RL, Narumiya S. International Union of Basic and Clinical Pharmacology. LXXXIII: classification of prostanoid receptors, updating 15 years of progress. Pharmacol Rev 2011; 63:471-538. [PMID: 21752876 DOI: 10.1124/pr.110.003517] [Citation(s) in RCA: 321] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
It is now more than 15 years since the molecular structures of the major prostanoid receptors were elucidated. Since then, substantial progress has been achieved with respect to distribution and function, signal transduction mechanisms, and the design of agonists and antagonists (http://www.iuphar-db.org/DATABASE/FamilyIntroductionForward?familyId=58). This review systematically details these advances. More recent developments in prostanoid receptor research are included. The DP(2) receptor, also termed CRTH2, has little structural resemblance to DP(1) and other receptors described in the original prostanoid receptor classification. DP(2) receptors are more closely related to chemoattractant receptors. Prostanoid receptors have also been found to heterodimerize with other prostanoid receptor subtypes and nonprostanoids. This may extend signal transduction pathways and create new ligand recognition sites: prostacyclin/thromboxane A(2) heterodimeric receptors for 8-epi-prostaglandin E(2), wild-type/alternative (alt4) heterodimers for the prostaglandin FP receptor for bimatoprost and the prostamides. It is anticipated that the 15 years of research progress described herein will lead to novel therapeutic entities.
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Affiliation(s)
- D F Woodward
- Dept. of Biological Sciences RD3-2B, Allergan, Inc., 2525 Dupont Dr., Irvine, CA 92612, USA.
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13
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Involvement of prostaglandin F 2 alpha receptor in ATP-induced mechanical allodynia. Neuroscience 2009; 163:362-71. [PMID: 19490931 DOI: 10.1016/j.neuroscience.2009.05.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 05/25/2009] [Accepted: 05/27/2009] [Indexed: 02/02/2023]
Abstract
Nociceptive primary afferents have the capacity to induce a state of increased excitability in the dorsal horn neurons of the spinal cord. It is well accepted that capsaicin-sensitive C-fibers transduce noxious stimulation and acute pain and that capsaicin-insensitive A beta-fibers are responsible for touch and innocuous sensation. It has been reported that the intrathecal (i.t.) administration of prostaglandin F(2 alpha) (PGF(2 alpha)) and ATP induces mechanical allodynia via the capsaicin-insensitive primary afferent pathway. In the present study, we investigated the interaction of purinoceptor P2X and the PGF(2 alpha) receptor (FP) in the induction of allodynia by use of mice lacking FP (FP(-/-)). Both PGF(2 alpha) and the P2X receptor agonist alphabeta-methylene ATP administered i.t. strongly induced allodynia for 50 min by tactile stimuli to the flank of mice. The allodynia induced by alphabeta-methylene ATP, but not that by PGF(2 alpha), was suppressed by simultaneous i.t. administration of P2X receptor antagonists pyridoxalphosphate-6-azophenyl-2,4-disulphonic acid and A-317491. In contrast, the allodynia induced by alphabeta-methylene ATP as well as that by PGF(2 alpha) was not observed in FP(-/-) mice. Immunostaining of beta-galactosidase, a reporter knocked into the endogenous FP locus in FP(-/-) mice, showed that the FP receptor was co-localized with P2X(2) and P2X(3) receptors in neurons of the spinal cord. alphabeta-Methylene ATP evoked a transient or sustained [Ca(2+)](i) increase in most of the PGF(2 alpha)-responsive cells in the deeper layer of the spinal cord, and the alphabeta-methylene ATP-evoked increase was blocked by the FP receptor antagonist AL-8810 in two-thirds of the cells. Neither PGF(2 alpha) nor alphabeta-methylene ATP induced the activation of spinal microglia. The present study demonstrates that the alphabeta-methylene ATP-evoked allodynia is mediated by the FP receptor, possibly via the functional coupling between the activation of P2X(2/3) receptors on the central terminal of capsaicin-insensitive fibers and FP receptors on spinal neurons.
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Suzuki-Yamamoto T, Toida K, Sugimoto Y, Ishimura K. Colocalization of prostaglandin F(2alpha) receptor FP and prostaglandin F synthase-I in the spinal cord. J Lipid Res 2009; 50:1996-2003. [PMID: 19429887 DOI: 10.1194/jlr.m800543-jlr200] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Prostaglandin F(2alpha) is synthesized by prostaglandin F synthase, which exists in two types, prostaglandin F synthase I (PGFS I) and prostaglandin F synthase II (PGFS II). Prostaglandin F(2alpha) binds to its specific receptor, FP. Our previous immunohistochemical study showed the distinct localization of prostaglandin F synthases in rat spinal cord. PGFS I exists in neuronal somata and dendrites in the gray substance, and PGFS II exists in ependymal cells and tanycytes surrounding the central canal. Both enzymes are also present in endothelial cells of blood vessels in the white and gray substances of the spinal cord. In this study, we found that FP localizes in neuronal somata and dendrites but not in ependymal cells, tanycytes, or endothelial cells. Immunohistochemical analysis of serial sections showed the colocalization of FP and PGFS I. FP immunoreactivity was intense in spinal laminae I and II of the dorsal horn, a connection site of pain transmission, and was similar to that of PGFS I in neuronal elements. These findings suggest that prostaglandin F(2alpha) synthesized in the neuronal somata and dendrites exert an autocrine action there.
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Affiliation(s)
- T Suzuki-Yamamoto
- Department of Nutritional Science, Okayama Prefectural University, Soja, Okayama, Japan.
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Brenneis C, Coste O, Schmidt R, Angioni C, Popp L, Nusing RM, Becker W, Scholich K, Geisslinger G. Consequences of altered eicosanoid patterns for nociceptive processing in mPGES-1-deficient mice. J Cell Mol Med 2008; 12:639-48. [PMID: 18419601 PMCID: PMC3822549 DOI: 10.1111/j.1582-4934.2007.00110.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Cyclooxygenase-2 (COX-2)-dependent prostaglandin (PG) E2 synthesis in the spinal cord plays a major role in the development of inflammatory hyperalgesia and allodynia. Microsomal PGE2 synthase-1 (mPGES-1) isomerizes COX-2-derived PGH2 to PGE2. Here, we evaluated the effect of mPGES-1-deficiency on the noci-ceptive behavior in various models of nociception that depend on PGE2 synthesis. Surprisingly, in the COX-2-dependent zymosan-evoked hyperalgesia model, the nociceptive behavior was not reduced in mPGES-1-deficient mice despite a marked decrease of the spinal PGE2 synthesis. Similarly, the nociceptive behavior was unaltered in mPGES-1-deficient mice in the formalin test. Importantly, spinal cords and primary spinal cord cells derived from mPGES-1-deficient mice showed a redirection of the PGE2 synthesis to PGD2, PGF2α and 6-keto-PGF1α (stable metabolite of PGI2). Since the latter prostaglandins serve also as mediators of noci-ception they may compensate the loss of PGE2 synthesis in mPGES-1-deficient mice.
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Affiliation(s)
- Christian Brenneis
- Pharmazentrum Frankfurt, ZAFES, Institut für Klinische Pharmakologie, Klinikum der Johann Wolfgang Goethe-Universität Theodor-Stern-Kai 7, Frankfurt, Germany
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Petrova LN, Gabrelian AV, Serkov IV, Bachurin SO. Effect of prostaglandins E2 and D2 on presynaptic NMDA receptors in rat cerebral cortex. Bull Exp Biol Med 2008; 144:298-300. [PMID: 18457019 DOI: 10.1007/s10517-007-0315-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We studied the effect of prostaglandins on presynaptic NMDA receptors. Prostaglandin E2 inhibited NMDA-induced (45)Ca2+ uptake by synaptosomes in low concentrations (IC50 approximately 10 microM), but potentiated it in higher concentrations. Prostaglandin D2 increased (45)Ca2+ uptake by synaptosomes during stimulation of NMDA receptors. Our results indicate that prostaglandins D2 and E2 modulate function of presynaptic NMDA receptors.
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Affiliation(s)
- L N Petrova
- Laboratory for Neurochemistry of Physiologically Active Substances, Institute of Physiologically Active Substances, Russian Academy of Sciences, Chemogolovka.
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Ohnishi T, Okuda-Ashitaka E, Matsumura S, Katano T, Nishizawa M, Ito S. Characterization of signaling pathway for the translocation of neuronal nitric oxide synthase to the plasma membrane by PACAP. J Neurochem 2008; 105:2271-85. [DOI: 10.1111/j.1471-4159.2008.05325.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Matsui K, Nishizawa M, Ozaki T, Kimura T, Hashimoto I, Yamada M, Kaibori M, Kamiyama Y, Ito S, Okumura T. Natural antisense transcript stabilizes inducible nitric oxide synthase messenger RNA in rat hepatocytes. Hepatology 2008; 47:686-97. [PMID: 18161049 DOI: 10.1002/hep.22036] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
UNLABELLED During inflammation, inducible nitric oxide synthase (iNOS) is induced to generate the important mediator nitric oxide (NO). Interleukin 1beta (IL-1beta) induces iNOS messenger RNA (mRNA), iNOS protein, and NO in rat hepatocytes. We found that the stability of iNOS mRNA changed during the induction and that the antisense (AS) strand corresponding to the 3'-untranslated region (3'UTR) of iNOS mRNA was transcribed from the iNOS gene. Expression levels of the iNOS AS transcript correlated with those of iNOS mRNA. The 1.5-kilobase region 3'-flanking to iNOS gene exon 27 was involved in IL-1beta induction. Knockdown experiments suggest that sense oligonucleotides to iNOS mRNA significantly reduced iNOS mRNA levels in the hepatocytes by blocking the interaction between iNOS mRNA and the AS transcript. Overexpression of iNOS AS transcript stabilized the reporter luciferase mRNA through the fused iNOS mRNA 3'UTR. These results together with the data in a yeast RNA-hybrid assay suggested that the iNOS AS transcript interacted with iNOS mRNA and stabilized iNOS mRNA. The iNOS mRNA colocalized with the AU-rich element-binding protein HuR, a human homolog of embryonic lethal-abnormal visual protein, and heterogeneous nuclear ribonucleoprotein L (hnRNP L) in the cytoplasm of rat hepatocytes. Interaction assays further revealed that the iNOS AS transcript interacted with HuR, which interacted with hnRNP L, suggesting that iNOS mRNA, the AS transcript, and the RNA-binding proteins may mutually interact. CONCLUSION The natural AS transcript of the iNOS gene interacts with iNOS mRNA and may play an important role in the stability of iNOS mRNA. This RNA-RNA interaction may be a new therapeutic target for NO-mediating inflammatory diseases.
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Affiliation(s)
- Kosuke Matsui
- Department of Surgery, Kansai Medical University, Moriguchi, Osaka, Japan
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Moriuchi H, Koda N, Okuda-Ashitaka E, Daiyasu H, Ogasawara K, Toh H, Ito S, Woodward DF, Watanabe K. Molecular characterization of a novel type of prostamide/prostaglandin F synthase, belonging to the thioredoxin-like superfamily. J Biol Chem 2007; 283:792-801. [PMID: 18006499 DOI: 10.1074/jbc.m705638200] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Prostaglandin F (PGF) ethanolamide (prostamide F) synthase, which catalyzed the reduction of prostamide H(2) to prostamide F(2alpha), was found in mouse and swine brain. The enzyme was purified from swine brain, and its amino acid sequence was defined. The mouse enzyme consisted of a 603-bp open reading frame coding for a 201-amino acid polypeptide with a molecular weight of 21,669. The amino acid sequence placed the enzyme in the thioredoxin-like superfamily with Cys(44) being the active site. The enzyme expressed in Escherichia coli as well as the native enzyme catalyzed not only the reduction of prostamide H(2) to prostamide F(2alpha) but also that of PGH(2) to PGF(2alpha). The V(max) and K(m) values for prostamide H(2) were about 0.25 micromol/min.mg of protein and 7.6 microm, respectively, and those for PGH(2) were about 0.69 micromol/min.mg of protein and 6.9 microm, respectively. Neither PGE(2) nor PGD(2) served as a substrate for this synthase. Based on these data, we named the enzyme prostamide/PGF synthase. Although the enzyme showed a broad specificity for reductants, reduced thioredoxin preferentially served as a reducing equivalent donor for this enzyme. Moreover, Northern and Western blot analyses in addition to the prostamide F synthase activity showed that the enzyme was mainly distributed in the brain and spinal cord, and the immunohistochemical study in the spinal cord showed that the enzyme was found mainly in the cytosol. These results suggest that prostamide/PGF synthase may play an important functional role in the central nervous system.
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Affiliation(s)
- Hiroshi Moriuchi
- Division of Life Science, Graduate School of Integrated Science and Art, University of East Asia, 2-1 Ichinomiyagakuen, Shimonoseki, Yamaguchi 751-8503, Japan
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Minami T, Matsumura S, Nishizawa M, Sasaguri Y, Hamanaka N, Ito S. Acute and late effects on induction of allodynia by acromelic acid, a mushroom poison related structurally to kainic acid. Br J Pharmacol 2004; 142:679-88. [PMID: 15159282 PMCID: PMC1575046 DOI: 10.1038/sj.bjp.0705834] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
1. Ingestion of a poisonous mushroom Clitocybe acromelalga is known to cause severe tactile pain (allodynia) in the extremities for a month and acromelic acid (ACRO), a kainate analogue isolated from the mushroom, produces selective damage of interneurons of the rat lower spinal cord when injected either systemically or intrathecally. Since ACRO has two isomers, ACRO-A and ACRO-B, here we examined their acute and late effects on induction of allodynia. 2. Intrathecal administration of ACRO-A and ACRO-B provoked marked allodynia by the first stimulus 5 min after injection, which lasted over the 50-min experimental period. Dose-dependency of the acute effect of ACRO-A on induction of allodynia showed a bell-shaped pattern from 50 ag x kg(-1) to 0.5 pg x kg(-1) and the maximum effect was observed at 50 fg x kg(-1). On the other hand, ACRO-B induced allodynia in a dose-dependent manner from 50 pg x kg(-1) to 50 ng x kg(-1). 3. N-methyl-d-aspartate (NMDA) receptor antagonists and Joro spider toxin, a Ca(2+)-permeable AMPA receptor antagonist, inhibited the allodynia induced by ACRO-A, but not by ACRO-B. However, other AMPA/kainate antagonists did not affect the allodynia induced by ACRO. 4. Whereas no neuronal damage was observed in the spinal cord in ACRO-A-treated mice, induction of allodynia by ACRO-A (50 fg x kg(-1)) and ACRO-B (50 ng x kg(-1)) was selectively lost 1 week after i.t. injection of a sublethal dose of ACRO-A (50 ng x kg(-1)) or ACRO-B (250 ng x kg(-1)). Higher doses of ACRO-A, however, could evoke allodynia dose-dependently from 50 pg x kg(-1) to 500 ng x kg(-1) in the ACRO-A-treated mice. The allodynia induced by ACRO-A (500 ng x kg(-1)) was not inhibited by Joro spider toxin or NMDA receptor antagonists. These properties of the late allodynia induced by ACRO-A were quite similar to those of the acute allodynia induced by ACRO-B. 5. ACRO-A could increase [Ca(2+)](i) in the deeper laminae, rather than in the superficial laminae, of the spinal cord. This increase was not blocked by the AMPA-preferring antagonist GYKI52466 and Joro spider toxin. 6. Taken together, these results demonstrate the stereospecificity of ACRO for the induction of allodynia and suggest the presence of a receptor specific to ACRO.
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Affiliation(s)
- Toshiaki Minami
- Department of Anesthesiology, Osaka Medical College, Takatsuki 569-8686, Japan
| | - Shinji Matsumura
- Department of Medical Chemistry, Kansai Medical University, 10–15 Fumizono, Moriguchi 570-8506, Japan
| | - Mikio Nishizawa
- Department of Medical Chemistry, Kansai Medical University, 10–15 Fumizono, Moriguchi 570-8506, Japan
| | - Yasuyuki Sasaguri
- Department of Pathology, University of Occupational Environmental Health, Kitakyushu 807-8555, Japan
| | - Nobuyuki Hamanaka
- Minase Research Institute, Ono Pharmaceutical Ltd, Mishima-gun, Osaka 618-8585, Japan
| | - Seiji Ito
- Department of Medical Chemistry, Kansai Medical University, 10–15 Fumizono, Moriguchi 570-8506, Japan
- Author for correspondence:
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Teshima S, Nakanishi H, Nishizawa M, Kitagawa K, Kaibori M, Yamada M, Habara K, Kwon AH, Kamiyama Y, Ito S, Okumura T. Up-regulation of IL-1 receptor through PI3K/Akt is essential for the induction of iNOS gene expression in hepatocytes. J Hepatol 2004; 40:616-23. [PMID: 15030977 DOI: 10.1016/j.jhep.2003.12.018] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2003] [Revised: 11/26/2003] [Accepted: 12/25/2003] [Indexed: 12/15/2022]
Abstract
BACKGROUND/AIMS Nuclear translocation and DNA binding of NF-kappaB is essential, as interleukin-1beta (IL-1beta) stimulates the induction of inducible nitric oxide synthase (iNOS) gene expression in hepatocytes. However, recent evidence indicates that the activation of NF-kappaB is not sufficient to induce the NF-kappaB-dependent transcription, and the existence of a second signaling is postulated. METHODS Primary cultured hepatocytes were treated with IL-1beta, and the expression of iNOS and type 1 IL-1 receptor (IL-1R1) was analyzed in the presence of antisense of IL-1R1, phosphatidylinositol 3-kinase (PI3K) inhibitor, proteasome inhibitor and hypoxia. Moreover, the activities of Akt and NF-kappaB were recorded and the cotransfection was carried out. RESULTS Antisense experiment revealed that IL-1R1 was required for iNOS transcription. IL-1beta markedly stimulated the induction of IL-1R1, which preceded the induction of iNOS. The IL-1R1 induction was found to be PI3K/Akt-dependent but NF-kappaB-independent. The up-regulation of IL-1R1 was associated with the second activation of Akt, which accelerated the phosphorylation of NF-kappaB p65 subunit. Cotransfection experiments revealed that Akt increased the transcriptional activity of iNOS gene promoter. CONCLUSIONS These results indicate that the up-regulation of IL-1R1 in concert with the activation of NF-kappaB is required for the transcriptional activation of iNOS gene.
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Affiliation(s)
- Shigeru Teshima
- Department of Surgery, Kansai Medical University, Osaka 570-8506, Japan
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