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Iwane S, Nemoto W, Miyamoto T, Hayashi T, Tanaka M, Uchitani K, Muranaka T, Fujitani M, Koizumi Y, Hirata A, Tsubota M, Sekiguchi F, Tan-No K, Kawabata A. Clinical and preclinical evidence that angiotensin-converting enzyme inhibitors and angiotensin receptor blockers prevent diabetic peripheral neuropathy. Sci Rep 2024; 14:1039. [PMID: 38200077 PMCID: PMC10781693 DOI: 10.1038/s41598-024-51572-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 01/06/2024] [Indexed: 01/12/2024] Open
Abstract
Given possible involvement of the central and peripheral angiotensin system in pain processing, we conducted clinical and preclinical studies to test whether pharmacological inhibition of the angiotensin system would prevent diabetic peripheral neuropathy (DPN) accompanying type 2 diabetes mellitus (T2DM). In the preclinical study, the nociceptive sensitivity was determined in leptin-deficient ob/ob mice, a T2DM model. A clinical retrospective cohort study was conducted, using the medical records of T2DM patients receiving antihypertensives at three hospitals for nearly a decade. In the ob/ob mice, daily treatment with perindopril, an angiotensin-converting enzyme inhibitor (ACEI), or telmisartan, an angiotensin receptor blocker (ARB), but not amlodipine, an L-type calcium channel blocker (CaB), significantly inhibited DPN development without affecting the hyperglycemia. In the clinical study, the enrolled 7464 patients were divided into three groups receiving ACEIs, ARBs and the others (non-ACEI, non-ARB antihypertensives). Bonferroni's test indicated significantly later DPN development in the ARB and ACEI groups than the others group. The multivariate Cox proportional analysis detected significant negative association of the prescription of ACEIs or ARBs and β-blockers, but not CaBs or diuretics, with DPN development. Thus, our study suggests that pharmacological inhibition of the angiotensin system is beneficial to prevent DPN accompanying T2DM.
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Affiliation(s)
- Shiori Iwane
- Laboratory of Pharmacology and Pathophysiology, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
- Department of Pharmacy, Kansai Medical University Hospital, Hirakata, 573-1191, Japan
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, 981-8558, Japan
| | - Tomoyoshi Miyamoto
- Laboratory of Pharmacology and Pathophysiology, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
- School of Pharmacy, Hyogo Medical University, Kobe, 650-8530, Japan
| | - Tomonori Hayashi
- Department of Pharmacy, Kindai University Nara Hospital, Ikoma, 630-0293, Japan
| | - Masayuki Tanaka
- Department of Pharmacy, Kansai Medical University Hospital, Hirakata, 573-1191, Japan
| | - Kazuki Uchitani
- Department of Pharmacy, Kansai Medical University Hospital, Hirakata, 573-1191, Japan
| | - Tatsuya Muranaka
- Department of Pharmacy, Kansai Medical University Hospital, Hirakata, 573-1191, Japan
| | - Masanori Fujitani
- Department of Pharmacy, Seichokai Fuchu Hospital, Izumi, 594-0076, Japan
| | - Yuichi Koizumi
- Department of Pharmacy, Seichokai Fuchu Hospital, Izumi, 594-0076, Japan
| | - Atsushi Hirata
- Department of Pharmacy, Kindai University Nara Hospital, Ikoma, 630-0293, Japan
| | - Maho Tsubota
- Laboratory of Pharmacology and Pathophysiology, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Fumiko Sekiguchi
- Laboratory of Pharmacology and Pathophysiology, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, 981-8558, Japan
| | - Atsufumi Kawabata
- Laboratory of Pharmacology and Pathophysiology, Faculty of Pharmacy, Kindai University, Higashi-Osaka, 577-8502, Japan.
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Nakagawasai O, Takahashi K, Koyama T, Yamagata R, Nemoto W, Tan-No K. Activation of angiotensin-converting enzyme 2 produces an antidepressant-like effect via MAS receptors in mice. Mol Brain 2023; 16:52. [PMID: 37312182 DOI: 10.1186/s13041-023-01040-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 05/29/2023] [Indexed: 06/15/2023] Open
Abstract
Angiotensin (Ang)-converting-enzyme (ACE) 2 converts Ang II into Ang (1-7), which in turn acts on MAS receptors (ACE2/Ang (1-7)/MAS receptors pathway). This pathway has neuroprotective properties, making it a potential therapeutic target for psychiatric disorders such as depression. Thus, we examined the effects of diminazene aceturate (DIZE), an ACE2 activator, on depressive-like behavior using behavioral, pharmacological, and biochemical assays. To determine whether DIZE or Ang (1-7) produce antidepressant-like effects, we measured the duration of immobility of mice in the tail suspension test following their intracerebroventricular administration. Next, we measured the levels of ACE2 activation in the cerebral cortex, prefrontal cortex, hippocampus, and amygdala after DIZE injection, and examined which cell types, including neurons, microglia, and astrocytes, express ACE2 in the hippocampus using immunofluorescence. Administration of DIZE or Ang (1-7) significantly shortened the duration of immobility time in the tail suspension test, while this effect was inhibited by the co-administration of the MAS receptor antagonist A779. DIZE activated ACE2 in the hippocampus. ACE2 was localized to neurons, astrocytes, and microglia in the hippocampus. In conclusion, these results suggest that DIZE may act on ACE2-positive cells in the hippocampus where it increases the activity of ACE2, thereby enhancing signaling of the ACE2/Ang (1-7)/MAS receptor pathway and resulting in antidepressant-like effects.
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Affiliation(s)
- Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Miyagi, Japan.
| | - Kohei Takahashi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Miyagi, Japan
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, 324-8501, Tochigi, Japan
| | - Taisei Koyama
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Miyagi, Japan
| | - Ryota Yamagata
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Miyagi, Japan
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Miyagi, Japan
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Miyagi, Japan
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Nemoto W, Yamagata R, Nakagawasai O, Tan-No K. Angiotensin-Related Peptides and Their Role in Pain Regulation. Biology (Basel) 2023; 12:biology12050755. [PMID: 37237567 DOI: 10.3390/biology12050755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/19/2023] [Accepted: 05/20/2023] [Indexed: 05/28/2023]
Abstract
Angiotensin (Ang)-generating system has been confirmed to play an important role in the regulation of fluid balance and blood pressure and is essential for the maintenance of biological functions. Ang-related peptides and their receptors are found throughout the body and exhibit diverse physiological effects. Accordingly, elucidating novel physiological roles of Ang-generating system has attracted considerable research attention worldwide. Ang-generating system consists of the classical Ang-converting enzyme (ACE)/Ang II/AT1 or AT2 receptor axis and the ACE2/Ang (1-7)/MAS1 receptor axis, which negatively regulates AT1 receptor-mediated responses. These Ang system components are expressed in various tissues and organs, forming a local Ang-generating system. Recent findings indicate that changes in the expression of Ang system components under pathological conditions are involved in the development of neuropathy, inflammation, and their associated pain. Here, we summarized the effects of changes in the Ang system on pain transmission in various organs and tissues involved in pain development process.
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Affiliation(s)
- Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
| | - Ryota Yamagata
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
| | - Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
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Nakagawasai O, Takahashi K, Sakuma W, Nemoto W, Kobayashi R, Hoshi T, Matsumoto S, Tadano T, Tan-No K. Peptides obtained by enzymatic decomposition of mackerel induce recovery from physical fatigue by enhancing the SIRT1-mediated antioxidant effect in the soleus muscle of mice. J Pharmacol Sci 2023; 152:61-67. [PMID: 37059492 DOI: 10.1016/j.jphs.2023.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 02/14/2023] [Accepted: 03/13/2023] [Indexed: 03/15/2023] Open
Abstract
Fatigue is a serious health problem, and long-term fatigue can lead to mental illnesses and accelerated aging. Oxidative stress, which causes excessive production of reactive oxygen species, is generally thought to increase during exercise and is an indicator of fatigue. Peptides obtained by enzymatic decomposition of mackerel (EMP) contain selenoneine, a strong antioxidant. Although antioxidants increase endurance, the effects of EMP on physical fatigue are unknown. The present study aimed to clarify this aspect. We investigated the effects of EMP on changes in locomotor activity, expression levels of silent mating type information regulation 2 homolog peroxisome 1 (SIRT1), proliferator-activated receptor-γ coactivator-1α (PGC1α), and antioxidative-related proteins including superoxide dismutase 1 (SOD1), SOD2, glutathione peroxidase 1, and catalase in the soleus muscle following EMP treatment before and/or after forced walking. Treatment with EMP before and after forced walking, and not only at one or another time point, improved the subsequent decrease in the locomotor activity and enhanced the levels of SIRT1, PGC1α, SOD1, and catalase expression in the soleus muscle of mice. Moreover, EX-527, a SIRT1 inhibitor, abolished these effects of EMP. Thus, we suggest that EMP combats fatigue by modulating the SIRT1/PGC1α/SOD1-catalase pathway.
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Affiliation(s)
- Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan.
| | - Kohei Takahashi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan; Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, Ohtawara, Tochigi 324-8501, Japan
| | - Wakana Sakuma
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Ruka Kobayashi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Tomohiro Hoshi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Satoshi Matsumoto
- LS Corporation Co. Ltd., 13-4 Kodenmacho-Nihonbashi, Chuo-ku, Tokyo 103-0001, Japan
| | - Takeshi Tadano
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan; Complementary and Alternative Medicine Clinical Research and Development, Graduate School of Medicine Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8640, Japan
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
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5
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Nakagawasai O, Yamada K, Takahashi K, Oshima Y, Hayasaka S, Shoji K, Nemoto W, Tan-No K. Effect of Globin Digests on Physical Fatigue in Mice. Biol Pharm Bull 2023; 46:1027-1030. [PMID: 37394635 DOI: 10.1248/bpb.b23-00193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Globin digest (GD) inhibits dietary hypertriglyceridemia; however, its effects on physical fatigue remain unknown. Therefore, this study aimed to investigate the potential anti-fatigue effects of GD. Repeated administration of GD and valine (Val)-Val-tyrosine (Tyr)-proline (Pro), a component of GD, for five days prevented the forced walking-induced decrease in locomotion. Furthermore, GD treatment reversed the forced walking-induced increase in blood lactate levels in mice and increased phosphorylated AMP-activated protein kinase (p-AMPK) in the soleus muscle, suggesting that the anti-fatigue effect of GD involves AMPK activation in the soleus muscle through reduced blood lactate.
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Affiliation(s)
- Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | | | - Kohei Takahashi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare
| | - Yuko Oshima
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Sena Hayasaka
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Kazuaki Shoji
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
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Nakagawasai O, Ambo A, Takahashi K, Onogi H, Nishimura Y, Okubo M, Nemoto W, Tan-No K. Intracerebroventricular Administration of Dermorphin-Dynorphin Analogs Producing Antidepressant-Like Effects through Activation of μ<sub>1</sub>- and κ-Opioid Receptors in Mice. Biol Pharm Bull 2022; 45:1203-1207. [DOI: 10.1248/bpb.b22-00164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Akihiro Ambo
- Division of Biochemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Kohei Takahashi
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare
| | - Hiroshi Onogi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Yuki Nishimura
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Myu Okubo
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
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Rosen SF, Lima LV, Chen C, Nejade R, Zhao M, Nemoto W, Toprak E, Skvortsova A, Tansley SN, Zumbusch A, Sotocinal SG, Pittman C, Mogil JS. Olfactory exposure to late-pregnant and lactating mice causes stress-induced analgesia in male mice. Sci Adv 2022; 8:eabi9366. [PMID: 35594354 PMCID: PMC9122321 DOI: 10.1126/sciadv.abi9366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 01/24/2022] [Indexed: 06/15/2023]
Abstract
In an attempt to improve reproducibility, more attention is being paid to potential sources of stress in the laboratory environment. Here, we report that the mere proximity of pregnant or lactating female mice causes olfactory-mediated stress-induced analgesia, to a variety of noxious stimuli, in gonadally intact male mice. We show that exposure to volatile compounds released in the urine of pregnant and lactating female mice can themselves produce stress and associated pain inhibition. This phenomenon, a novel form of female-to-male chemosignaling, is mediated by female scent marking of urinary volatiles, such as n-pentyl-acetate, and likely signals potential maternal aggression aimed at defending against infanticide by stranger males.
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Nakagawasai O, Takahashi K, Ambo A, Onuma K, Takahashi N, Nemoto W, Tan-No K. Antidepressant Effect of Intracerebroventricularly Administered Deltorphin Analogs in the Mouse Tail Suspension Test. Biol Pharm Bull 2022; 45:538-541. [DOI: 10.1248/bpb.b21-01078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Kohei Takahashi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Akihiro Ambo
- Division of Biochemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Kentaro Onuma
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Naruya Takahashi
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
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Nemoto W, Yamanishi Y, Limviphuvadh V, Fujishiro S, Shimamura S, Fukushima A, Toh H. A Web Server for GPCR-GPCR Interaction Pair Prediction. Front Endocrinol (Lausanne) 2022; 13:825195. [PMID: 35399947 PMCID: PMC8989088 DOI: 10.3389/fendo.2022.825195] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
The GGIP web server (https://protein.b.dendai.ac.jp/GGIP/) provides a web application for GPCR-GPCR interaction pair prediction by a support vector machine. The server accepts two sequences in the FASTA format. It responds with a prediction that the input GPCR sequence pair either interacts or not. GPCRs predicted to interact with the monomers constituting the pair are also shown when query sequences are human GPCRs. The server is simple to use. A pair of amino acid sequences in the FASTA format is pasted into the text area, a PDB ID for a template structure is selected, and then the 'Execute' button is clicked. The server quickly responds with a prediction result. The major advantage of this server is that it employs the GGIP software, which is presently the only method for predicting GPCR-interaction pairs. Our web server is freely available with no login requirement. In this article, we introduce some application examples of GGIP for disease-associated mutation analysis.
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Affiliation(s)
- Wataru Nemoto
- Division of Life Science, Department of Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
- Master’s Programs of Life Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
- *Correspondence: Wataru Nemoto,
| | - Yoshihiro Yamanishi
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka-shi, Japan
| | - Vachiranee Limviphuvadh
- Bioinformatics Institute (BII), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Shunsuke Fujishiro
- Master’s Programs of Life Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
| | - Sakie Shimamura
- Master’s Programs of Life Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
| | - Aoi Fukushima
- Division of Life Science, Department of Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
| | - Hiroyuki Toh
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda-shi, Japan
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Nakagawasai O, Takahashi K, Miura Y, Nemoto W, Obara Y, Tan-No K. ERK5 inhibitor BIX02189 attenuates methamphetamine-induced hyperactivity by modulating microglial activation in the striatum. J Pharmacol Sci 2022; 148:326-330. [DOI: 10.1016/j.jphs.2022.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 01/11/2022] [Accepted: 01/17/2022] [Indexed: 10/19/2022] Open
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Nemoto W, Yamanishi Y, Limviphuvadh V, Fujishiro S, Shimamura S, Fukushima A, Toh H. Corrigendum: A Web Server for GPCR-GPCR Interaction Pair Prediction. Front Endocrinol (Lausanne) 2022; 13:944910. [PMID: 35721717 PMCID: PMC9198592 DOI: 10.3389/fendo.2022.944910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 11/22/2022] Open
Abstract
[This corrects the article DOI: 10.3389/fendo.2022.825195.].
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Affiliation(s)
- Wataru Nemoto
- Division of Life Science, Department of Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
- Master’s Programs of Life Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
- *Correspondence: Wataru Nemoto,
| | - Yoshihiro Yamanishi
- Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka-shi, Japan
| | - Vachiranee Limviphuvadh
- Bioinformatics Institute (BII), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Shunsuke Fujishiro
- Master’s Programs of Life Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
| | - Sakie Shimamura
- Master’s Programs of Life Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
| | - Aoi Fukushima
- Division of Life Science, Department of Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Hatoyama-machi, Japan
| | - Hiroyuki Toh
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda-shi, Japan
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Nemoto A, Goyagi T, Nemoto W, Nakagawasai O, Tan-No K, Niiyama Y. Low Skeletal Muscle Mass Is Associated With Perioperative Neurocognitive Disorder Due To Decreased Neurogenesis in Rats. Anesth Analg 2021; 134:194-203. [PMID: 34347659 DOI: 10.1213/ane.0000000000005681] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Perioperative neurocognitive disorder (PND) is a postsurgical complication associated with neuroinflammation and impaired hippocampal neurogenesis, in which brain-derived neurotrophic factor (BDNF) plays a key role. Sarcopenia refers to age-related muscle loss that causes cognitive decline, muscle atrophy, and postoperative delirium. Rats with tail suspension (TS) were used to represent a low-activity model, which involves decreased hind limb function by TS. This hind limb unloading by TS can induce sarcopenia in 2 weeks. However, the relationship between PND and muscle atrophy is unclear. In this experiment, we investigated whether preoperative muscle atrophy induced by TS would affect neurogenesis and accelerate PND in rats. METHODS Sixty 21-week-old rats were assigned to 4 groups: the TS group, the TS with surgery (TS + S) group, the control group, and the control with surgery (control + S) group. After the abdominal manipulation under 3% sevoflurane anesthesia, cognitive function was assessed using the Morris water maze test and a fear-conditioning test. Neurogenesis was evaluated by checking BDNF secretion and immunohistochemical staining in the hippocampus. RESULTS The TS + S group showed impaired swimming latency (difference of means = 12.4 versus control + S; 95% confidence interval [CI], 2.0-22.7; P = .016) (difference of means = 15.2 versus TS; 95% CI, 0.4-30.1; P = .043) and path length (difference of means = 147.8 versus control + S; 95% CI, 20.7-274.9; P = .020) in the maze test and cued fear memory (difference of means = -26.0 versus TS; 95% CI, -46.4 to -5.6; P = .006) (difference of means = -22.3 versus control + S; 95% CI, -42.7 to -1.9; P = .026) in the fear-conditioning test. The postoperative levels of BDNF in the TS + S and TS groups were reduced compared with the other groups (P = .002). The number of neural precursors in the dentate gyrus was significantly lower in the TS + S group (P < .001). CONCLUSIONS We observed that preoperative hind limb muscle atrophy, indicated by TS, was associated with an increased occurrence of PND through the reduction in BDNF and neurogenesis after abdominal surgery in young adult rats. Therefore, we concluded that preoperative low skeletal muscle mass can induce PND due to impaired postoperative neurogenesis. Our findings might indicate that low-cost perioperative interventions, such as preoperative exercise, is beneficial to preventing PND.
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Affiliation(s)
- Akira Nemoto
- From the Department of Anesthesia and Intensive Care Medicine, Akita University Graduate School of Medicine, Akita, Japan
| | - Toru Goyagi
- From the Department of Anesthesia and Intensive Care Medicine, Akita University Graduate School of Medicine, Akita, Japan
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Yukitoshi Niiyama
- From the Department of Anesthesia and Intensive Care Medicine, Akita University Graduate School of Medicine, Akita, Japan
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13
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Yamagata R, Nemoto W, Fujita M, Nakagawasai O, Tan-No K. Angiotensin (1-7) Attenuates the Nociceptive Behavior Induced by Substance P and NMDA via Spinal MAS1. Biol Pharm Bull 2021; 44:742-746. [PMID: 33952831 DOI: 10.1248/bpb.b20-01004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The intrathecal (i.t.) injection of substance P (SP) and N-methyl-D-aspartate (NMDA) induce transient nociceptive response by activating neurokinin (NK) 1 and NMDA receptors, respectively. We have recently reported that angiotensin (Ang) (1-7), an N-terminal fragment of Ang II, could alleviate several types of pain including neuropathic and inflammatory pain by activating spinal MAS1. Here, we investigated whether Ang (1-7) can inhibit the SP- and NMDA-induced nociceptive response. The nociceptive response induced by an i.t. injection of SP or NMDA was assessed by measuring the duration of hindlimb scratching directed toward the flank, biting and/or licking of the hindpaw or the tail for 5 min. Localization of MAS1 and either NK1 or NMDA receptors in the lumbar superficial dorsal horn was determined by immunohistochemical observation. The nociceptive response induced by SP and NMDA was attenuated by the i.t. co-administration of Ang (1-7) (0.03-3 pmol) in a dose-dependent manner. The inhibitory effects of Ang (1-7) (3 pmol) were attenuated by A779 (100 pmol), a MAS1 antagonist. Moreover, immunohistochemical analysis showed that spinal MAS1 co-localized with NK1 receptors and NMDA receptors on cells in the dorsal horn. Taken together, the i.t. injection of Ang (1-7) attenuated the nociceptive response induced by SP and NMDA via spinal MAS1, which co-localized with NK1 and NMDA receptors. Thus, the spinal Ang (1-7)/MAS1 pathway could represent a therapeutic target to effectively attenuate spinal pain transmission caused by the activation of NK1 or NMDA receptors.
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Affiliation(s)
- Ryota Yamagata
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Wataru Nemoto
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Maho Fujita
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Osamu Nakagawasai
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Koichi Tan-No
- Division of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
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14
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Nakagawasai O, Lin JR, Odaira T, Takahashi K, Nemoto W, Moriguchi S, Yabuki Y, Kobayakawa Y, Fukunaga K, Nakada M, Tan-No K. Scabronine G Methyl Ester Improves Memory-Related Behavior and Enhances Hippocampal Cell Proliferation and Long-Term Potentiation via the BDNF-CREB Pathway in Olfactory Bulbectomized Mice. Front Pharmacol 2020; 11:583291. [PMID: 33281604 PMCID: PMC7689418 DOI: 10.3389/fphar.2020.583291] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/30/2020] [Indexed: 11/30/2022] Open
Abstract
A previous study reported that scabronine G methyl ester (SG-ME) potentially enhances the in vitro secretion of neurotrophic factors such as nerve growth factor via the protein kinase C (PKC)-ζ pathway. However, it remains unknown whether SG-ME can improve cognitive dysfunctions in olfactory bulbectomized (OBX) mice. To address this question, we evaluated SG-ME-treated and untreated OBX mice in a passive avoidance test. We also investigated potential effects of SG-ME on several parameters: cell proliferation and cAMP response element-binding protein (CREB) phosphorylation in the hippocampal dentate gyrus by immunohistochemistry, brain-derived neurotrophic factor (BDNF) levels in the hippocampus by Western blotting, p-CREB levels in the hippocampus by MapAnalyzer, and long-term potentiation (LTP) by electrophysiology. On the 14th day after surgery OBX mice showed altered passive avoidance and decreases in both cell proliferation and long-term potentiation in the hippocampus, while these changes were reversed by SG-ME (20 μg/mouse) 24 h after the treatment. The improvement in memory deficits was prevented when SG-ME was co-administeredwith either zeta inhibitory peptide (PKC-ζ inhibitor), anti-BDNF antibody, ANA-12 (TrkB antagonist), U0126 (MEK inhibitor), H-89 (PKA inhibitor), LY294002 (PI3K inhibitor) or KN-93 (CaMKII inhibitor). We found that SG-ME enhanced brain-derived neurotrophic factor and p-CREB levels in the hippocampus while p-CREB was localized in neurons, but not in astrocytes nor microglial cells. These findings revealed the potential of SG-ME in improving memory impairments by enhancing cell proliferation and LTP via activation of the BDNF/CREB signaling pathway in neurons.
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Affiliation(s)
- Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Jia-Rong Lin
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takayo Odaira
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Kohei Takahashi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan.,Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, Ohtawara, Japan
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Shigeki Moriguchi
- Research Center for Pharmaceutical Development, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan.,Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Yasushi Yabuki
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan.,Department of Genomic Neurology, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, Japan
| | - Yu Kobayakawa
- Department of Chemistry and Biochemistry, Faculty of Science and Engineering, Waseda University, Tokyo, Japan
| | - Kohji Fukunaga
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Masahisa Nakada
- Department of Chemistry and Biochemistry, Faculty of Science and Engineering, Waseda University, Tokyo, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai, Japan
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15
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Takahashi K, Nakagawasai O, Nakajima T, Okubo M, Nishimura Y, Sakuma W, Yamagata R, Nemoto W, Miyagawa K, Kurokawa K, Mochida-Saito A, Tsuji M, Takeda H, Tadano T, Tan-No K. Dopamine D2 receptor supersensitivity in the hypothalamus of olfactory bulbectomized mice. Brain Res 2020; 1746:147015. [DOI: 10.1016/j.brainres.2020.147015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/25/2020] [Accepted: 07/08/2020] [Indexed: 02/07/2023]
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16
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Sakuma W, Nakagawasai O, Nemoto W, Odaira T, Ogawa T, Ohta K, Endo Y, Tan-No K. Antidepressant effect of BE360, a new selective estrogen receptor modulator, activated via CREB/BDNF, Bcl-2 signaling pathways in ovariectomized mice. Behav Brain Res 2020; 393:112764. [PMID: 32535181 DOI: 10.1016/j.bbr.2020.112764] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/26/2020] [Accepted: 06/07/2020] [Indexed: 12/12/2022]
Abstract
We have previously reported that the carborane compound BE360, a novel selective estrogen receptor modulator, has a therapeutic potential against dementia. This study aimed to explore the effects and underlying mechanisms of BE360 on depression-like behaviors in ovariectomized (OVX) mice subjected to subchronic stress, which are postmenopausal depression models. BE360 was subcutaneously administrated using a mini-osmotic pump, for 2 weeks. Depression-like behaviors were evaluated using the forced swimming test. Neurogenesis in the hippocampal dentate gyrus (DG) was measured by analyzing cells expressing doublecortin (DCX) following 5-bromo-2'-deoxyuridine (BrdU) uptake. The levels of phosphorylated cyclic-AMP response element-binding protein (p-CREB), brain-derived neurotrophic factor (BDNF), and Bcl-2 were measured using immunohistochemistry or immunoblotting. Depression-like behaviors in OVX + Stress-exposed mice improved after chronic treatment with BE360. BE360 treatment in OVX + Stress-exposed mice increased p-CREB, BDNF, and Bcl-2 expressions in the hippocampus. Immunohistochemistry showed that the number of BrdU/DCX double-positive cells in the DG of the hippocampus, which decreased significantly in OVX + Stress-exposed mice, increased after subchronic treatment with BE360. The present study demonstrates that BE360 exerts antidepressant effects via hippocampal neurogenesis, potentially activated through CREB/BDNF, Bcl-2 signaling pathways. These results indicate that BE360 may have therapeutic potential against postmenopausal depression.
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Affiliation(s)
- Wakana Sakuma
- Department of Pharmacology, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Wataru Nemoto
- Department of Pharmacology, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Takayo Odaira
- Department of Pharmacology, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Takumi Ogawa
- Laboratory of Organic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Kiminori Ohta
- Laboratory of Organic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Yasuyuki Endo
- Laboratory of Organic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
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17
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Abstract
G protein-coupled receptors (GPCRs) can form homodimers, heterodimers, or higher-order molecular complexes (oligomers). The reports on the change of functions through the oligomerization have been accumulated. Inhibition of GPCR oligomerization without affecting the protomer's overall structure would clarify the oligomer-specific functions although inhibition experiments are costly and require accurate information about the interface location. Unfortunately, the number of experimentally determined interfaces is limited. The precise prediction of the oligomerization interfaces is, therefore, useful for inhibition experiments to examine the oligomer-specific functions, which would accelerate investigations of the GPCR signaling. However, interface prediction for GPCR oligomerization is difficult because different GPCR subtypes belonging to the same subfamily often use different structural regions as their interfaces. We previously developed a high-performance method to predict the interfaces for GPCR oligomerization, by identifying the conserved surfaces with the sequence and structure information. Then, the structural characteristic of a GPCR structure is regarded to be a thick-tube like conformation that is approximately perpendicular to the membrane plane. Our method had successfully predicted all of the interfaces available on that day. We had launched a web server for our interface prediction of GPCRs (GRIP). We have improved the previous version of GRIP server and enhanced its usability. First, we discarded the approximation of the GPCR structure as the thick-tube-like conformation. This improvement increased the number of structures for the prediction. Second, the FUGUE-based template recommendation service was introduced to facilitate the choice of an appropriate structure for the prediction. The new prediction server is available at http://grip.b.dendai.ac.jp/∼grip/.
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Affiliation(s)
- Akira Saito
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Tokyo, Japan
| | - Daiki Tsuchiya
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Tokyo, Japan
| | | | | | - Yoichi Murakami
- Laboratory of Bioinformatics, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Institute for Protein Research, Osaka University, Osaka, Japan.,Department of Informatics, Tokyo University of Information Sciences, Tokyo, Japan
| | - Kenji Mizuguchi
- Laboratory of Bioinformatics, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Institute for Protein Research, Osaka University, Osaka, Japan
| | - Hiroyuki Toh
- Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, Nishinomiya, Japan
| | - Wataru Nemoto
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Tokyo, Japan.,Department of Life Science and Engineering, Division of Life Science and Engineering, Tokyo Denki University (TDU), Tokyo, Japan
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18
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Nemoto W, Yamagata R, Nakagawasai O, Nakagawa K, Hung WY, Fujita M, Tadano T, Tan-No K. Effect of spinal angiotensin-converting enzyme 2 activation on the formalin-induced nociceptive response in mice. Eur J Pharmacol 2020; 872:172950. [PMID: 31987711 DOI: 10.1016/j.ejphar.2020.172950] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 01/14/2020] [Accepted: 01/24/2020] [Indexed: 12/30/2022]
Abstract
We have previously demonstrated that the phosphorylation of p38 MAPK, through spinal AT1 receptor activation, is involved in formalin-induced nociception and follows accompanied by the increase in spinal angiotensin (Ang) II levels. We have also found that Ang (1-7), an N-terminal fragment of Ang II generated by ACE2, prevents the Ang II-induced nociceptive behavior via spinal MAS1 and the inhibition of p38 MAPK phosphorylation. Here, we examined whether the ACE2 activator diminazene aceturate (DIZE) can prevent the formalin-induced nociception in mice. The i.t. administration of DIZE attenuated the second, but not the first phase of formalin-induced nociceptive response. An increase in the activity of spinal ACE2 was measured following DIZE administration. The inhibitory effect of DIZE on nociception was abolished by the i.t. co-administration of the MAS1 antagonist A779. The i.t. administration of Ang (1-7) showed a similar effect on the second phase of the response which was also attenuated by A779. Furthermore, DIZE and Ang (1-7) each inhibited the formalin-induced phosphorylation of p38 MAPK on the dorsal lumbar spinal cord. This inhibition was again prevented by A779. ACE2 was expressed in neurons and microglia but absent from astrocytes in the superficial dorsal horn. Our data show that the i.t.-administered DIZE attenuates the second phase of the formalin-induced nociception which is accompanied by the inhibition of p38 MAPK phosphorylation. They also suggest the involvement of MAS1 activation on spinal neurons and microglia in response to the increase in Ang (1-7) following ACE2 activation.
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Affiliation(s)
- Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan.
| | - Ryota Yamagata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Koharu Nakagawa
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Wan-Yi Hung
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Maho Fujita
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Takeshi Tadano
- Complementary and Alternative Medicine Clinical Research and Development, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
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19
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Yamagata R, Nemoto W, Nakagawasai O, Takahashi K, Tan-No K. Downregulation of spinal angiotensin converting enzyme 2 is involved in neuropathic pain associated with type 2 diabetes mellitus in mice. Biochem Pharmacol 2020; 174:113825. [PMID: 31987854 DOI: 10.1016/j.bcp.2020.113825] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/22/2020] [Indexed: 12/30/2022]
Abstract
We have previously reported that the spinal angiotensin (Ang) system is involved in the modulation of streptozotocin (STZ)-induced diabetic neuropathic pain in mice. An important drawback of this model however is the fact that the neuropathic pain is independent of hyperglycemia and produced by the direct stimulation of peripheral nerves. Here, using the leptin deficient ob/ob mouse as a type 2 diabetic model, we examined whether the spinal Ang system was involved in naturally occuring diabetic neuropathic pain. Blood glucose levels were increased in ob/ob mice at 5-15 weeks of age. Following the hyperglycemia, persistent tactile and thermal hyperalgesia were observed at 11-14 and 9-15 weeks of age, respectively, which was ameliorated by insulin treatment. At 12 weeks of age, the expression of Ang-converting enzyme (ACE) 2 in the spinal plasma membrane fraction was decreased in ob/ob mice. Spinal ACE2 was expressed in neurons and microglia but the number of NeuN-positive neurons was decreased in ob/ob mice. In addition, the intrathecal administration of Ang (1-7) and SB203580, a p38 MAPK inhibitor, attenuated hyperalgesia in ob/ob mice. The phosphorylation of spinal p38 MAPK was also attenuated by Ang (1-7) in ob/ob mice. These inhibitory effects of Ang (1-7) were prevented by A779, a Mas receptor antagonist. In conclusion, we revealed that the Ang (1-7)-generating system is downregulated in ob/ob mice and is accompanied by a loss of ACE2-positive neurons. Furthermore, Ang (1-7) decreased the diabetic neuropathic pain through inhibition of p38 MAPK phosphorylation via spinal Mas receptors.
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Affiliation(s)
- Ryota Yamagata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Kohei Takahashi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
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20
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Takahashi K, Nakagawasai O, Nemoto W, Odaira T, Sakuma W, Onogi H, Nishijima H, Furihata R, Nemoto Y, Iwasa H, Tan-No K, Tadano T. Effect of Enterococcus faecalis 2001 on colitis and depressive-like behavior in dextran sulfate sodium-treated mice: involvement of the brain-gut axis. J Neuroinflammation 2019; 16:201. [PMID: 31672153 PMCID: PMC6822456 DOI: 10.1186/s12974-019-1580-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 09/10/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Patients with inflammatory bowel disease (IBD), including those with ulcerative colitis and Crohn's disease, have higher rates of psychiatric disorders, such as depression and anxiety; however, the mechanism of psychiatric disorder development remains unclear. Mice with IBD induced by dextran sulfate sodium (DSS) in drinking water exhibit depressive-like behavior. The presence of Lactobacillus in the gut microbiota is associated with major depressive disorder. Therefore, we examined whether Enterococcus faecalis 2001 (EF-2001), a biogenic lactic acid bacterium, prevents DSS-induced depressive-like behavior and changes in peripheral symptoms. METHODS We evaluated colon inflammation and used the tail suspension test to examine whether EF-2001 prevents IBD-like symptoms and depressive-like behavior in DSS-treated mice. The protein expression of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), X-linked inhibitor of apoptosis protein (XIAP), and cleaved caspase-3 in the rectum and hippocampus was assessed by western blotting. Hippocampal neurogenesis, altered nuclear factor-kappa B (NFκB) p65 morphometry, and the localization of activated NFκB p65 and XIAP were examined by immunohistochemistry. RESULTS Treatment with 1.5% DSS for 7 days induced IBD-like pathology and depressive-like behavior, increased TNF-α and IL-6 expression in the rectum and hippocampus, activated caspase-3 in the hippocampus, and decreased hippocampal neurogenesis. Interestingly, these changes were reversed by 20-day administration of EF-2001. Further, EF-2001 administration enhanced NFκB p65 expression in the microglial cells and XIAP expression in the hippocampus of DSS-treated mice. CONCLUSION EF-2001 prevented IBD-like pathology and depressive-like behavior via decreased rectal and hippocampal inflammatory cytokines and facilitated the NFκB p65/XIAP pathway in the hippocampus. Our findings suggest a close relationship between IBD and depression.
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Affiliation(s)
- Kohei Takahashi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan.,Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi, 324-8501, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan.
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Takayo Odaira
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Wakana Sakuma
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Hiroshi Onogi
- Faculty of Health Science, Tohoku Fukushi University, 1-8-1 Kunimi, Aoba-ku, Sendai, Miyagi, 981-8522, Japan
| | - Hiroaki Nishijima
- Department of Healthcare and Regulatory Sciences, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Ryuji Furihata
- Department of Psychiatry, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Yukio Nemoto
- Kampo and Herbal Medicine Research Center, Yokohama University of Pharmacy, 601 Matanocho, Totsuka-ku, Yokohama City, Kanagawa, 245-0066, Japan
| | - Hiroyuki Iwasa
- Nihon Berm Co, Ltd, 2-14-3 Nagatachou, Chiyoda-ku, Tokyo, 100-0014, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Takeshi Tadano
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan.,Complementary and Alternative Medicine Clinical Research and Development, Graduate School of Medicine Sciences, Kanazawa University, Kanazawa, 920-8640, Japan
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21
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Odaira T, Nakagawasai O, Takahashi K, Nemoto W, Sakuma W, Lin JR, Tan-No K. Mechanisms underpinning AMP-activated protein kinase-related effects on behavior and hippocampal neurogenesis in an animal model of depression. Neuropharmacology 2019; 150:121-133. [PMID: 30914305 DOI: 10.1016/j.neuropharm.2019.03.026] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 03/01/2019] [Accepted: 03/19/2019] [Indexed: 01/04/2023]
Abstract
Adenosine monophosphate-activated protein kinase (AMPK) is critical for whole-body energy metabolism regulation. Recent studies have suggested that physical exercise ameliorates depressive-like behaviors via AMPK activation; however, the underlying mechanism is unclear. Here, we examined the effects and underlying mechanisms of AMPK activation on depressive-like behavior in olfactory bulbectomized (OBX) mice. We treated OBX mice with the AMPK activator, 5-aminoimidazole-4-carboxamide-1-β-d-ribonucleotide (AICAR) on the 7th or 14th day after bilateral bulbectomy and evaluated depressive-like behavior using the tail-suspension test (TST) and forced swimming test (FST) on the 21st day. The expression of phosphorylated AMPK, protein kinase C ζ (PKCζ), nuclear factor-kappa B (NF-κB), brain-derived neurotrophic factor (BDNF), and cAMP response element-binding protein (CREB) in the hippocampus was assessed by western blotting. Hippocampal neurogenesis and localization of AMPK and phosphorylated NF-κB were examined by immunohistochemistry. Chronic AICAR treatment suppressed the prolonged immobility of OBX mice in the TST and FST, and increased the levels of phosphorylated AMPK, PKCζ, NF-κB, CREB, and BDNF. Hippocampal neurogenesis in OBX mice was promoted by chronic AICAR treatment. Co-administration of AICAR with the PKCζ inhibitor or the neurotrophic tyrosine kinase receptor type 2 (TrkB) antagonist, ANA-12, inhibited these effects. Phosphorylated AMPK was detected in mature and immature hippocampal neurons and microglia, while phosphorylated NF-κB was detected only in neurons in AICAR-treated OBX mice. These data indicate that AMPK activation produces anti-depressant effects, which are mediated by elevated hippocampal neurogenesis potentially via PKCζ/NF-κB/BDNF/TrkB/CREB signaling in neurons.
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Affiliation(s)
- Takayo Odaira
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
| | - Kohei Takahashi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Wakana Sakuma
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Jia-Rong Lin
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
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22
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Ogata Y, Nemoto W, Yamagata R, Nakagawasai O, Shimoyama S, Furukawa T, Ueno S, Tan‐No K. Anti‐hypersensitive effect of angiotensin (1‐7) on streptozotocin‐induced diabetic neuropathic pain in mice. Eur J Pain 2018; 23:739-749. [DOI: 10.1002/ejp.1341] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 11/04/2018] [Accepted: 11/05/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Yoshiki Ogata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences Tohoku Medical and Pharmaceutical University Aoba‐ku, Sendai Japan
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences Tohoku Medical and Pharmaceutical University Aoba‐ku, Sendai Japan
| | - Ryota Yamagata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences Tohoku Medical and Pharmaceutical University Aoba‐ku, Sendai Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences Tohoku Medical and Pharmaceutical University Aoba‐ku, Sendai Japan
| | - Shuji Shimoyama
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Tomonori Furukawa
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Shinya Ueno
- Department of Neurophysiology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Koichi Tan‐No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences Tohoku Medical and Pharmaceutical University Aoba‐ku, Sendai Japan
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23
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Yamagata R, Nemoto W, Nakagawasai O, Hung WY, Shima K, Endo Y, Tan-No K. Etidronate attenuates tactile allodynia by spinal ATP release inhibition in mice with partial sciatic nerve ligation. Naunyn Schmiedebergs Arch Pharmacol 2018; 392:349-357. [PMID: 30515539 DOI: 10.1007/s00210-018-1593-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 11/22/2018] [Indexed: 12/20/2022]
Abstract
Etidronate is widely used as a therapeutic agent for osteoporosis. We have recently shown that intrathecal administration of etidronate into mice produces an analgesic effect against the capsaicin-induced nociceptive behavior. However, the effect of etidronate on neuropathic pain at the spinal level remains unknown. Therefore, we examined whether etidronate attenuates pain after partial sciatic nerve ligation (PSNL). We evaluated tactile allodynia 7 days after PSNL by measuring paw withdrawal with the von Frey filament test. The mRNA and protein levels of SLC17A9 in the ipsilateral lumbar dorsal spinal cord of PSNL-operated mice were determined using real-time PCR and western blotting, respectively. PSNL-induced tactile allodynia was attenuated by oral and intrathecal administration of etidronate, with maximum efficiency at 90 and 60 min after injection, respectively. The anti-allodynic effect of intrathecally administered etidronate was completely inhibited by an intrathecal administration of adenosine triphosphate (ATP). The solute carrier family, SLC17, mediates the transport of pain transmitters, like ATP and glutamate. Indeed, we detected several members of the SLC17 family in the mouse dorsal lumbar spinal cord. Among the detected mRNAs, only Slc17a9, encoding for neuronal vesicular ATP transporter, was significantly increased upon PSNL. SLC17A9 protein levels were also significantly increased. In mice subjected to PSNL, SLC17A9 was present in neurons and microglia, but not in astrocytes of the lumbar superficial dorsal horn. Collectively, our results suggest that etidronate produces its anti-allodynic effects by inhibiting SLC17A9-dependent exocytotic ATP release from the dorsal horn in mice subjected to PSNL.
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Affiliation(s)
- Ryota Yamagata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Wan-Yi Hung
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
| | - Kazuhiro Shima
- Division of Oral Molecular Regulation, Graduate School of Dentistry, Tohoku University, 4-1 Seiryocho, Aoba-ku, Sendai, 980-8575, Japan
| | - Yasuo Endo
- Division of Oral Molecular Regulation, Graduate School of Dentistry, Tohoku University, 4-1 Seiryocho, Aoba-ku, Sendai, 980-8575, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan.
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24
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Nemoto W. Behavioral and Molecular Pharmacological Study of the Role of Angiotensin II in Spinal Pain Transmission. YAKUGAKU ZASSHI 2018; 138:1235-1240. [DOI: 10.1248/yakushi.18-00124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
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25
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Takahashi K, Nakagawasai O, Nemoto W, Odaira T, Sakuma W, Tan-No K. Antidepressant-like effect of aripiprazole via 5-HT1A, D1, and D2 receptors in the prefrontal cortex of olfactory bulbectomized mice. J Pharmacol Sci 2018; 137:241-247. [DOI: 10.1016/j.jphs.2018.06.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/04/2018] [Accepted: 04/06/2018] [Indexed: 12/26/2022] Open
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26
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Takahashi K, Nakagawasai O, Nemoto W, Kadota S, Isono J, Odaira T, Sakuma W, Arai Y, Tadano T, Tan-No K. Memantine ameliorates depressive-like behaviors by regulating hippocampal cell proliferation and neuroprotection in olfactory bulbectomized mice. Neuropharmacology 2018; 137:141-155. [DOI: 10.1016/j.neuropharm.2018.04.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/05/2018] [Accepted: 04/10/2018] [Indexed: 02/06/2023]
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27
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Takahashi K, Nakagawasai O, Sugawara M, Sato A, Nemoto W, Tadano T, Tan-No K. Kappa Opioid Receptor Agonist Administration in Olfactory Bulbectomized Mice Restores Cognitive Impairment through Cholinergic Neuron Activation. Biol Pharm Bull 2018; 41:957-960. [DOI: 10.1248/bpb.b18-00115] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kohei Takahashi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Masae Sugawara
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Atsushi Sato
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
| | - Takeshi Tadano
- Complementary and Alternative Medicine Clinical Research and Development, Graduate School of Medicine Sciences, Kanazawa University
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University
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28
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Ohta T, Kawashima T, Shinozaki NO, Dobashi A, Hiraoka S, Hoshino T, Kanno K, Kataoka T, Kawashima S, Matsui M, Nemoto W, Nishijima S, Suganuma N, Suzuki H, Taguchi YH, Takenaka Y, Tanigawa Y, Tsuneyoshi M, Yoshitake K, Sato Y, Yamashita R, Arakawa K, Iwasaki W. Collaborative environmental DNA sampling from petal surfaces of flowering cherry Cerasus × yedoensis 'Somei-yoshino' across the Japanese archipelago. J Plant Res 2018; 131:709-717. [PMID: 29460198 DOI: 10.1007/s10265-018-1017-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 01/23/2018] [Indexed: 11/25/2022]
Abstract
Recent studies have shown that environmental DNA is found almost everywhere. Flower petal surfaces are an attractive tissue to use for investigation of the dispersal of environmental DNA in nature as they are isolated from the external environment until the bud opens and only then can the petal surface accumulate environmental DNA. Here, we performed a crowdsourced experiment, the "Ohanami Project", to obtain environmental DNA samples from petal surfaces of Cerasus × yedoensis 'Somei-yoshino' across the Japanese archipelago during spring 2015. C. × yedoensis is the most popular garden cherry species in Japan and clones of this cultivar bloom simultaneously every spring. Data collection spanned almost every prefecture and totaled 577 DNA samples from 149 collaborators. Preliminary amplicon-sequencing analysis showed the rapid attachment of environmental DNA onto the petal surfaces. Notably, we found DNA of other common plant species in samples obtained from a wide distribution; this DNA likely originated from the pollen of the Japanese cedar. Our analysis supports our belief that petal surfaces after blossoming are a promising target to reveal the dynamics of environmental DNA in nature. The success of our experiment also shows that crowdsourced environmental DNA analyses have considerable value in ecological studies.
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Affiliation(s)
- Tazro Ohta
- Database Center for Life Science (DBCLS), Joint Support-Center for Data Science Research, Research Organization of Information and Systems (ROIS), Mishima, Shizuoka, 411-8540, Japan.
| | | | - Natsuko O Shinozaki
- Division of Biomedical Information Analysis, Tohoku University Graduate School of Medicine, Sendai, Miyagi, 980-8573, Japan
| | - Akito Dobashi
- Pathology Project for Molecular Targets, The Cancer Institute, Japanese Foundation for Cancer Research, Koto, Tokyo, 135-8550, Japan
| | - Satoshi Hiraoka
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, 277-8568, Japan
| | - Tatsuhiko Hoshino
- Geomicrobiology Group, Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Kochi, 783-8502, Japan
| | - Keiichi Kanno
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-0845, Japan
| | - Takafumi Kataoka
- Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan
| | - Shuichi Kawashima
- Database Center for Life Science (DBCLS), Joint Support-Center for Data Science Research, Research Organization of Information and Systems (ROIS), Kashiwa, Chiba, 277-0871, Japan
| | - Motomu Matsui
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo, 113-0032, Japan
| | - Wataru Nemoto
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Hiki-gun, Saitama, 350-0394, Japan
| | - Suguru Nishijima
- Computational Bio-Big Data Open Innovation Lab., National Institute of Advanced Industrial Science and Technology, Shinjuku-ku, Tokyo, 169-0072, Japan.,Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, 277-8568, Japan.,Research Organization for Nano & Life Innovation, Waseda University, Shinjuku-ku, Tokyo, 162-0072, Japan
| | - Natsuki Suganuma
- Institute of Health Sciences, Ezaki Glico Co. Ltd., Nishiyodogawa, Osaka, 555-8502, Japan
| | - Haruo Suzuki
- Institute for Advanced Biosciences, Keio University, Fujisawa, Kanagawa, 252-0882, Japan
| | - Y-H Taguchi
- Department of Physics, Chuo University, Bunkyo, Tokyo, 112-8551, Japan
| | - Yoichi Takenaka
- Faculty of Informatics, Kansai University, Takatsuki, Osaka, 569-1052, Japan
| | - Yosuke Tanigawa
- Department of Bioinformatics and Systems Biology, Faculty of Science, The University of Tokyo, Bunkyo, Tokyo, 113-0032, Japan
| | - Momoka Tsuneyoshi
- Advanced Microbiological Functions Research Group, Frontier Research Labs, Institute For Innovation, Ajinomoto Co., Inc., Kawasaki, Kanagawa, 210-8681, Japan
| | | | - Yukuto Sato
- Division of Biomedical Information Analysis, Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, 980-8573, Japan
| | - Riu Yamashita
- Division of Biomedical Information Analysis, Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Miyagi, 980-8573, Japan
| | - Kazuharu Arakawa
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, 997-0052, Japan
| | - Wataru Iwasaki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo, 113-0032, Japan
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29
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Nemoto W, Yamagata R, Ogata Y, Nakagawasai O, Tadano T, Tan-No K. Inhibitory effect of angiotensin (1-7) on angiotensin III-induced nociceptive behaviour in mice. Neuropeptides 2017; 65:71-76. [PMID: 28559062 DOI: 10.1016/j.npep.2017.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/24/2017] [Accepted: 05/21/2017] [Indexed: 12/14/2022]
Abstract
We have previously demonstrated that the intrathecal (i.t.) administration of angiotensin (Ang) II into mice produces a nociceptive behaviour consisting of scratching, biting and licking accompanied by the phosphorylation of p38 MAPK in the spinal cord, which was mediated through AT1 receptors. Both the p38 MAPK phosphorylation and subsequent nociceptive behaviour were attenuated by the i.t. co-administration of Ang (1-7), an N-terminal fragment of Ang II, that acted via Mas receptors. On the other hand, a C-terminal fragment of Ang II, namely Ang III, was also shown to induce a nociceptive behaviour by acting upon AT1 receptors on spinal astrocytes and neurons, and was found to be more potent than Ang II. However, the inhibitory effect of Ang (1-7) on the Ang III-induced nociceptive behaviour remains unclear. Thus, here we examined whether Ang (1-7) can attenuate the Ang III-induced nociceptive behaviour and activation of spinal p38 MAPK. The i.t. administration of Ang (1-7) (1-100fmol) dose-dependently attenuated the Ang III (1pmol)-induced nociceptive behaviour in mice. Moreover, the inhibitory effect of Ang (1-7) at a dose of 100fmol was prevented by A779 (30fmol), a Mas receptor antagonist. Western blot analysis showed that the phosphorylation of p38 MAPK induced by the i.t. administration of Ang III (1pmol) was also attenuated by Ang (1-7) (100fmol), and this inhibition was prevented by A779 (30fmol). Furthermore, we showed that in the lumbar superficial dorsal horn, Mas receptors are expressed in neurons and microglia but absent from astrocytes. Together, these results suggest that the i.t. administration of Ang (1-7) attenuates the nociceptive behaviour and accompanying p38 MAPK phosphorylation induced by Ang III, and that this effect is likely mediated through Mas receptors on spinal neurons.
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Affiliation(s)
- Wataru Nemoto
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Ryota Yamagata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Yoshiki Ogata
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Osamu Nakagawasai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
| | - Takeshi Tadano
- Department of Health Care Medical Research, Venture Business Laboratory, Kanazawa University, Kanazawa 920-1192, Japan
| | - Koichi Tan-No
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
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30
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Nemoto W, Limviphuvadh V, Maurer-Stroh S, Fujishiro S, Yamanishi Y, Amemiya Y, Toh H. Prediction of Cancer-Associated Hotspot Mutations that Affect GPCR Oligomerization. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.1584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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31
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Shima K, Nemoto W, Tsuchiya M, Tan-No K, Takano-Yamamoto T, Sugawara S, Endo Y. The Bisphosphonates Clodronate and Etidronate Exert Analgesic Effects by Acting on Glutamate- and/or ATP-Related Pain Transmission Pathways. Biol Pharm Bull 2017; 39:770-7. [PMID: 27150146 DOI: 10.1248/bpb.b15-00882] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bisphosphonates (BPs) are typical anti-bone-resorptive drugs, with nitrogen-containing BPs (N-BPs) being stronger than non-nitrogen-containing BPs (non-N-BPs). However, N-BPs have inflammatory/necrotic effects, while the non-N-BPs clodronate and etidronate lack such side effects. Pharmacological studies have suggested that clodronate and etidronate can (i) prevent the side effects of N-BPs in mice via inhibition of the phosphate transporter families SLC20 and/or SLC34, through which N-BPs enter soft-tissue cells, and (ii) also inhibit the phosphate transporter family SLC17. Vesicular transporters for the pain transmitters glutamate and ATP belong to the SLC17 family. Here, we examined the hypothesis that clodronate and etidronate may enter neurons through SLC20/34, then inhibit SLC17-mediated transport of glutamate and/or ATP, resulting in their decrease, and thereby produce analgesic effects. We analyzed in mice the effects of various agents [namely, intrathecally injected clodronate, etidronate, phosphonoformic acid (PFA; an inhibitor of SLC20/34), and agonists of glutamate and ATP receptors] on the nociceptive responses to intraplantar injection of capsaicin. Clodronate and etidronate produced analgesic effects, and these effects were abolished by PFA. The analgesic effects were reduced by N-methyl-D-aspartate (agonist of the NMDA receptor, a glutamate receptor) and α,β-methylene ATP (agonist of the P2X-receptor, an ATP receptor). SLC20A1, SLC20A2, and SLC34A1 were detected within the mouse lumbar spinal cord. Although we need direct evidence, these results support the above hypothesis. Clodronate and etidronate may be representatives of a new type of analgesic drug. Such drugs, with both anti-bone-resorptive and unique analgesic effects without the adverse effects associated with N-BPs, might be useful for osteoporosis.
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Affiliation(s)
- Kazuhiro Shima
- Division of Oral Molecular Regulation, Graduate School of Dentistry, Tohoku University
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32
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Ogata Y, Nemoto W, Nakagawasai O, Yamagata R, Tadano T, Tan-No K. Involvement of Spinal Angiotensin II System in Streptozotocin-Induced Diabetic Neuropathic Pain in Mice. Mol Pharmacol 2016; 90:205-13. [DOI: 10.1124/mol.116.104133] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 07/06/2016] [Indexed: 01/13/2023] Open
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33
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Nemoto W, Yamanishi Y, Limviphuvadh V, Saito A, Toh H. GGIP: Structure and sequence-based GPCR-GPCR interaction pair predictor. Proteins 2016; 84:1224-33. [PMID: 27191053 DOI: 10.1002/prot.25071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 04/26/2016] [Accepted: 05/09/2016] [Indexed: 01/20/2023]
Abstract
G Protein-Coupled Receptors (GPCRs) are important pharmaceutical targets. More than 30% of currently marketed pharmaceutical medicines target GPCRs. Numerous studies have reported that GPCRs function not only as monomers but also as homo- or hetero-dimers or higher-order molecular complexes. Many GPCRs exert a wide variety of molecular functions by forming specific combinations of GPCR subtypes. In addition, some GPCRs are reportedly associated with diseases. GPCR oligomerization is now recognized as an important event in various biological phenomena, and many researchers are investigating this subject. We have developed a support vector machine (SVM)-based method to predict interacting pairs for GPCR oligomerization, by integrating the structure and sequence information of GPCRs. The performance of our method was evaluated by the Receiver Operating Characteristic (ROC) curve. The corresponding area under the curve was 0.938. As far as we know, this is the only prediction method for interacting pairs among GPCRs. Our method could accelerate the analyses of these interactions, and contribute to the elucidation of the global structures of the GPCR networks in membranes. Proteins 2016; 84:1224-1233. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Wataru Nemoto
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Ishizaka, Hatoyama-Machi, Hiki-Gun, Saitama, 350-0394, Japan.,Computational Biology Research Center (CBRC), Advanced Industrial Science and Technology (AIST), AIST Tokyo Waterfront Bio-IT Research Building, 2-4-7 Aomi, Koto-Ku, Tokyo, 135-0064, Japan
| | - Yoshihiro Yamanishi
- Medical Institute of Bioregulation (MiB), Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.,Institute for Advanced Study, Kyushu University, 6-10-1, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan
| | - Vachiranee Limviphuvadh
- Bioinformatics Institute (BII), Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, 138671, Singapore
| | - Akira Saito
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Ishizaka, Hatoyama-Machi, Hiki-Gun, Saitama, 350-0394, Japan
| | - Hiroyuki Toh
- Computational Biology Research Center (CBRC), Advanced Industrial Science and Technology (AIST), AIST Tokyo Waterfront Bio-IT Research Building, 2-4-7 Aomi, Koto-Ku, Tokyo, 135-0064, Japan.,Department of Biomedical Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda-Shi, Hyogo, 669-1337, Japan
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34
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Obara Y, Nagasawa R, Nemoto W, Pellegrino MJ, Takahashi M, Habecker BA, Stork PJS, Ichiyanagi O, Ito H, Tomita Y, Ishii K, Nakahata N. ERK5 induces ankrd1 for catecholamine biosynthesis and homeostasis in adrenal medullary cells. Cell Signal 2015; 28:177-189. [PMID: 26739108 DOI: 10.1016/j.cellsig.2015.12.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 12/24/2015] [Indexed: 01/04/2023]
Abstract
Extracellular signal-regulated kinases (ERKs) play important roles in proliferation, differentiation and gene expression. In our previous study, we demonstrated that both ERK5 and ERK1/2 were responsible for neurite outgrowth and tyrosine hydroxylase (TH) expression in rat pheochromocytoma cells (PC12) (J Biol Chem 284, 23,564-23,573, 2009). However, the functional differences between ERK5 and ERK1/2 signaling in neural differentiation remain unclear. In the present study, we show that ERK5, but not ERK1/2 regulates TH levels in rat sympathetic neurons. Furthermore, microarray analysis performed in PC12 cells using ERK5 and ERK1/2-specific inhibitors, identified ankyrin repeat domain 1 (ankrd1) as an ERK5-dependent and ERK1/2-independent gene. Here, we report a novel role of the ERK5/ankrd1 signaling in regulating TH levels and catecholamine biosynthesis. Ankrd1 mRNA was induced by nerve growth factor in time- and concentration-dependent manners. TH levels were reduced by ankrd1 knockdown with no changes in the mRNA levels, suggesting that ankrd1 was involved in stabilization of TH protein. Interestingly, ubiquitination of TH was enhanced and catecholamine biosynthesis was reduced by ankrd1 knockdown. Finally, we examined the relationship of ERK5 to TH levels in human adrenal pheochromocytomas. Whereas TH levels were correlated with ERK5 levels in normal adrenal medullas, ERK5 was down-regulated and TH was up-regulated in pheochromocytomas, indicating that TH levels are regulated by alternative mechanisms in tumors. Taken together, ERK5 signaling is required for catecholamine biosynthesis during neural differentiation, in part to induce ankrd1, and to maintain appropriate TH levels. This pathway is disrupted in pathological conditions.
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Affiliation(s)
- Yutaro Obara
- Department of Cellular Signaling, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai 980-8578, Japan; Department of Pharmacology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan.
| | - Ryusuke Nagasawa
- Department of Cellular Signaling, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Wataru Nemoto
- Department of Cellular Signaling, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Michael J Pellegrino
- Department of Physiology and Pharmacology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239-3098, USA
| | - Maho Takahashi
- The Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239-3098, USA
| | - Beth A Habecker
- Department of Physiology and Pharmacology, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239-3098, USA
| | - Philip J S Stork
- The Vollum Institute, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239-3098, USA
| | - Osamu Ichiyanagi
- Department of Urology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Hiromi Ito
- Department of Urology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Yoshihiko Tomita
- Department of Urology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Kuniaki Ishii
- Department of Pharmacology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Norimichi Nakahata
- Department of Cellular Signaling, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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Nemoto W, Ogata Y, Nakagawasai O, Yaoita F, Tadano T, Tan-No K. Involvement of p38 MAPK activation mediated through AT1 receptors on spinal astrocytes and neurons in angiotensin II- and III-induced nociceptive behavior in mice. Neuropharmacology 2015. [DOI: 10.1016/j.neuropharm.2015.07.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Nakagawasai O, Yamada K, Nemoto W, Sato S, Ogata Y, Miya K, Sakurai H, Tan-No K. Liver hydrolysate attenuates the sickness behavior induced by concanavalin A in mice. J Pharmacol Sci 2015; 127:489-92. [DOI: 10.1016/j.jphs.2015.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/02/2015] [Accepted: 03/23/2015] [Indexed: 10/23/2022] Open
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Nagarathnam B, Karpe SD, Harini K, Sankar K, Iftekhar M, Rajesh D, Giji S, Archunan G, Balakrishnan V, Gromiha MM, Nemoto W, Fukui K, Sowdhamini R. DOR - a Database of Olfactory Receptors - Integrated Repository for Sequence and Secondary Structural Information of Olfactory Receptors in Selected Eukaryotic Genomes. Bioinform Biol Insights 2014; 8:147-58. [PMID: 25002814 PMCID: PMC4069036 DOI: 10.4137/bbi.s14858] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 03/20/2014] [Accepted: 03/20/2014] [Indexed: 11/05/2022] Open
Abstract
Olfaction is the response to odors and is mediated by a class of membrane-bound proteins called olfactory receptors (ORs). An understanding of these receptors serves as a good model for basic signal transduction mechanisms and also provides important clues for the strategies adopted by organisms for their ultimate survival using chemosensory perception in search of food or defense against predators. Prior research on cross-genome phylogenetic analyses from our group motivated the addressal of conserved evolutionary trends, clustering, and ortholog prediction of ORs. The database of olfactory receptors (DOR) is a repository that provides sequence and structural information on ORs of selected organisms (such as Saccharomyces cerevisiae, Drosophila melanogaster, Caenorhabditis elegans, Mus musculus, and Homo sapiens). Users can download OR sequences, study predicted membrane topology, and obtain cross-genome sequence alignments and phylogeny, including three-dimensional (3D) structural models of 100 selected ORs and their predicted dimer interfaces. The database can be accessed from http://caps.ncbs.res.in/DOR. Such a database should be helpful in designing experiments on point mutations to probe into the possible dimerization modes of ORs and to even understand the evolutionary changes between different receptors.
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Affiliation(s)
| | - Snehal D Karpe
- National Center for Biological Sciences (TIFR), Bangalore, India
| | - Krishnan Harini
- National Center for Biological Sciences (TIFR), Bangalore, India
| | - Kannan Sankar
- Birla Institute of Technology and Science, Pilani, India. ; Presently in: Bioinformatics and Computational Biology Program, Iowa State University, Ames, IA, USA
| | | | - Durairaj Rajesh
- Department of Animal Sciences, Bharathidasan University, Tiruchirapalli, Tamil Nadu, India
| | - Sadasivam Giji
- National Center for Biological Sciences (TIFR), Bangalore, India
| | - Govidaraju Archunan
- Department of Animal Sciences, Bharathidasan University, Tiruchirapalli, Tamil Nadu, India
| | - Veluchamy Balakrishnan
- Department of Biotechnology, K.S. Rangasamy College of Technology, Tiruchengode, Tamil Nadu, India
| | - M Michael Gromiha
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India
| | - Wataru Nemoto
- Current Address: Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University, Ishizaka, Hatoyama-cho, Hiki-gun, Saitama, 350-0394, Japan
| | - Kazhuhiko Fukui
- Molecular Profiling Research Center for Drug Discover, National Institute of Advanced Industrial Science and Technology, Aomi, Koto-ku,Tokyo, Japan
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Nemoto W, Ogata Y, Nakagawasai O, Yaoita F, Tadano T, Tan-No K. Angiotensin (1-7) prevents angiotensin II-induced nociceptive behaviour via inhibition of p38 MAPK phosphorylation mediated through spinal Mas receptors in mice. Eur J Pain 2014; 18:1471-9. [PMID: 24733750 DOI: 10.1002/ejp.512] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2014] [Indexed: 12/30/2022]
Abstract
BACKGROUND We have recently demonstrated that intrathecal (i.t.) administration of angiotensin II (Ang II) induces nociceptive behaviour in mice accompanied by a phosphorylation of p38 mitogen-activated protein kinase (MAPK) mediated through Ang II type 1 (AT1 ) receptors. The N-terminal fragment of Ang II, Ang (1-7), plays a pivotal role in counterbalancing many of the well-established actions induced by Ang II. However, the role of Ang (1-7) in spinal nociceptive transmission remains unclear. Therefore, we examined whether i.t. administration of Ang (1-7) can inhibit the Ang II-induced nociceptive behaviour in mice. METHODS In the behavioural experiments, the accumulated response time of nociceptive behaviour consisting of scratching, biting and licking in conscious mice was determined during a 25-min period starting after i.t. injection. The distribution and localization of AT1 or Mas receptors were analysed using a MapAnalyzer and confocal microscope, respectively. Phosphorylation of p38 MAPK in the dorsal spinal cord was measured by Western blotting. RESULTS The nociceptive behaviour induced by Ang II was dose-dependently inhibited by the co-administration of Ang (1-7). The inhibitory effect of Ang (1-7) was reversed by the co-administration of A779, a Mas receptor antagonist. Western blot analysis showed that the increase in spinal p38 MAPK phosphorylation following the i.t. administration of Ang II was also inhibited by Ang (1-7), and the Ang (1-7) induced-inhibition was prevented by A779. CONCLUSIONS Our data show that the i.t. administration of Ang (1-7) attenuates an Ang II-induced nociceptive behaviour and is accompanied by the inhibition of p38 MAPK phosphorylation mediated through Mas receptors.
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Affiliation(s)
- W Nemoto
- Department of Pharmacology, Tohoku Pharmaceutical University, Sendai, Japan
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Nemoto W, Saito A, Oikawa H. Recent advances in functional region prediction by using structural and evolutionary information - Remaining problems and future extensions. Comput Struct Biotechnol J 2013; 8:e201308007. [PMID: 24688747 PMCID: PMC3962155 DOI: 10.5936/csbj.201308007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/12/2013] [Accepted: 11/13/2013] [Indexed: 11/22/2022] Open
Abstract
Structural genomics projects have solved many new structures with unknown functions. One strategy to investigate the function of a structure is to computationally find the functionally important residues or regions on it. Therefore, the development of functional region prediction methods has become an important research subject. An effective approach is to use a method employing structural and evolutionary information, such as the evolutionary trace (ET) method. ET ranks the residues of a protein structure by calculating the scores for relative evolutionary importance, and locates functionally important sites by identifying spatial clusters of highly ranked residues. After ET was developed, numerous ET-like methods were subsequently reported, and many of them are in practical use, although they require certain conditions. In this mini review, we first introduce the remaining problems and the recent improvements in the methods using structural and evolutionary information. We then summarize the recent developments of the methods. Finally, we conclude by describing possible extensions of the evolution- and structure-based methods.
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Affiliation(s)
- Wataru Nemoto
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Ishizaka, Hatoyama-cho, Hiki-gun, Saitama, 350-0394, Japan
| | - Akira Saito
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Ishizaka, Hatoyama-cho, Hiki-gun, Saitama, 350-0394, Japan
| | - Hayato Oikawa
- Division of Life Science and Engineering, School of Science and Engineering, Tokyo Denki University (TDU), Ishizaka, Hatoyama-cho, Hiki-gun, Saitama, 350-0394, Japan
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Nakagawasai O, Yamada K, Nemoto W, Fukahori M, Tadano T, Tan-No K. Liver hydrolysate assists in the recovery from physical fatigue in a mouse model. J Pharmacol Sci 2013; 123:328-35. [PMID: 24257438 DOI: 10.1254/jphs.13084fp] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
It is reported that liver hydrolysate (LH) enhances liver function. However, the effects of LH on physical fatigue are unknown. The aim of this study was to investigate the effect of LH on alterations in locomotor activity and energy metabolism such as 5'-AMP-activated protein kinase (AMPK), glycogen content, and blood lactic acid, after forced walking. Adult male ddY mice were used. Locomotor activity, AMPK phosphorylation, and glycogen content in the liver and soleus muscle, as well as blood lactic acid were determined following LH treatment before and/or after forced walking. The locomotor activity significantly decreased after forced walking for 3 h. Two administrations of LH (30 or 100 mg/kg) significantly increased the locomotor activity, while a single administration either before or after forced walking did not show any specific effect. Administering LH twice activated AMPK in the liver and soleus muscle. Glycogen levels significantly decreased in both the liver and soleus muscle after forced walking, whereas the blood lactate level significantly increased. In contrast, administering LH twice increased muscle glycogen and decreased blood lactic acid. These findings indicate that LH produced an anti-fatigue effect and that this effect appears to involve the efficient glycogen utilization through activation of AMPK.
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Nemoto W, Nakagawasai O, Yaoita F, Kanno SI, Yomogida S, Ishikawa M, Tadano T, Tan-No K. Angiotensin II produces nociceptive behavior through spinal AT1 receptor-mediated p38 mitogen-activated protein kinase activation in mice. Mol Pain 2013; 9:38. [PMID: 23898828 PMCID: PMC3737069 DOI: 10.1186/1744-8069-9-38] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 07/24/2013] [Indexed: 12/28/2022] Open
Abstract
Background It has been demonstrated that angiotensin II (Ang II) participates in either the inhibition or the facilitation of nociceptive transmission depending on the brain area. Neuronal Ang II is locally synthesized not only in the brain, but also in the spinal cord. Though the spinal cord is an important area for the modulation of nociception, the role of spinal Ang II in nociceptive transmission remains unclear. Therefore, in order to elucidate the role of Ang II in nociceptive transmission in the spinal cord, we examined the effect of intrathecal (i.t.) administration of Ang II into mice. Results I.t. administration of Ang II produced a behavioral response in mice mainly consisting of biting and/or licking of the hindpaw and the tail along with slight hindlimb scratching directed toward the flank. The behavior induced by Ang II (3 pmol) was dose-dependently inhibited by intraperitoneal injection of morphine (0.1-0.3 mg/kg), suggesting that the behavioral response is related to nociception. The nociceptive behavior was also inhibited dose-dependently by i.t. co-administration of losartan (0.3-3 nmol), an Ang II type 1 (AT1) receptor antagonist, and SB203580 (0.1-1 nmol), a p38 MAPK inhibitor. However, the Ang II type 2 (AT2) receptor antagonist PD123319, the upstream inhibitor of ERK1/2 phosphorylation U0126, and the JNK inhibitor SP600125 had no effect on Ang II-induced nociceptive behavior. Western blot analysis showed that the i.t. injection of Ang II induced phosphorylation of p38 MAPK in the lumbar dorsal spinal cord, which was inhibited by losartan, without affecting ERK1/2 and JNK. Furthermore, we found that AT1 receptor expression was relatively high in the lumbar superficial dorsal horn. Conclusions Our data show that i.t. administration of Ang II induces nociceptive behavior accompanied by the activation of p38 MAPK signaling mediated through AT1 receptors. This observation indicates that Ang II may act as a neurotransmitter and/or neuromodulator in the spinal transmission of nociceptive information.
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Niijima-Yaoita F, Tsuchiya M, Saito H, Nagasawa Y, Murai S, Arai Y, Nakagawasai O, Nemoto W, Tadano T, Tan-No K. Influence of a long-term powdered diet on the social interaction test and dopaminergic systems in mice. Neurochem Int 2013; 63:309-15. [PMID: 23871718 DOI: 10.1016/j.neuint.2013.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 06/22/2013] [Accepted: 07/07/2013] [Indexed: 10/26/2022]
Abstract
It is well known that the characteristics of mastication are important for the maintenance of our physical well-being. In this study, to assess the importance of the effects of food hardness during mastication, we investigated whether a long-term powdered diet might cause changes in emotional behavior tests, including spontaneous locomotor activity and social interaction (SI) tests, and the dopaminergic system of the frontal cortex and hippocampus in mice. Mice fed a powdered diet for 17 weeks from weaning were compared with mice fed a standard diet (control). The dopamine turnover and expression of dopamine receptors mRNA in the frontal cortex were also evaluated. Spontaneous locomotor activity, SI time and dopamine turnover of the frontal cortex were increased in powdered diet-fed mice. On the other hand, the expression of dopamine-4 (D4) receptors mRNA in the frontal cortex was decreased in powdered diet-fed mice. Moreover, we examined the effect of PD168077, a selective D4 agonist, on the increased SI time in powdered diet-fed mice. Treatment with PD168077 decreased the SI time. These results suggest that the masticatory dysfunction induced by long-term powdered diet feeding may cause the increased SI time and the changes in the dopaminergic system, especially dopamine D4 receptor subtype in the frontal cortex.
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Affiliation(s)
- Fukie Niijima-Yaoita
- Department of Pharmacology, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
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Nemoto W, Sato T, Nakagawasai O, Yaoita F, Silberring J, Tadano T, Tan-No K. Phenylmethanesulfonyl fluoride, a serine protease inhibitor, suppresses naloxone-precipitated withdrawal jumping in morphine-dependent mice. Neuropeptides 2013; 47:187-91. [PMID: 23290539 DOI: 10.1016/j.npep.2012.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 10/20/2012] [Accepted: 11/27/2012] [Indexed: 11/22/2022]
Abstract
We have previously shown that intracerebroventricular (i.c.v.) administration of cysteine protease inhibitors suppresses naloxone-precipitated withdrawal jumping in morphine-dependent mice, presumably through the inhibition of dynorphin degradation (see (Tan-No, K., Sato, T., Shimoda, M., Nakagawasai, O., Niijima, F., Kawamura, S., Furuta, S., Sato, T., Satoh, S., Silberring, J., Terenius, L., Tadano, T., 2010. Suppressive effects by cysteine protease inhibitors on naloxone-precipitated withdrawal jumping in morphine-dependent mice. Neuropeptides 44, 279-283)). In the present study, we examined the effect of phenylmethanesulfonyl fluoride (PMSF), a serine protease inhibitor, on naloxone-precipitated withdrawal jumping in morphine-dependent mice. The doses of morphine (mg/kg per injection) were subcutaneously given twice daily for 2 days [day 1 (30) and day 2 (60)]. On day 3, naloxone (8 mg/kg) was intraperitoneally administered 3h after the final injection of morphine (60 mg/kg), and the number of jumps was immediately recorded for 20 min. Naloxone-precipitated withdrawal jumping was significantly suppressed by i.c.v. administration of PMSF (4 nmol), given 5 min before each morphine treatment during the induction phase, with none given on the test day. The expression of tissue plasminogen activator (tPA), a serine protease that converts plasminogen to plasmin, in the prefrontal cortex was significantly increased in morphine-dependent and -withdrawal mice, as compared with saline-treated mice. Moreover, trans-4-(aminomethyl)-cyclohexanecarboxylic acid (300 pmol), an antiplasmin agent, and (Tyr(1))-thrombin receptor activating peptide 7 (0.45 and 2 nmol), an antagonist of protease activated receptor-1 (PAR-1), significantly suppressed naloxone-precipitated withdrawal jumping. The present results suggest that PMSF suppresses naloxone-precipitated withdrawal jumping in morphine-dependent mice, presumably through the inhibition of activities of tPA and plasmin belonging to the serine proteases family, which subsequently activates PAR-1.
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Affiliation(s)
- Wataru Nemoto
- Department of Pharmacology, Tohoku Pharmaceutical University, Aoba-ku, Sendai, Japan
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Oba A, Nakagawasai O, Onogi H, Nemoto W, Yaoita F, Arai Y, Tan-No K, Tadano T. Chronic fluvoxamine treatment changes 5-HT(2A/2C) receptor-mediated behavior in olfactory bulbectomized mice. Life Sci 2012; 92:119-24. [PMID: 23159642 DOI: 10.1016/j.lfs.2012.11.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Revised: 10/18/2012] [Accepted: 11/05/2012] [Indexed: 11/25/2022]
Abstract
AIMS Olfactory bulbectomy (OBX) in rodents represents a valuable experimental model of depression. This study was designed to shed further light on the impact of putative serotonergic neuronal degeneration in OBX mice and to assess the effect of a widely used antidepressant on serotonergic related behavioral changes induced by OBX. MAIN METHODS Adult male ddY mice were subject to bilateral OBX or sham surgery. The serotonin (5-HT)(2A/2C) receptor agonist 2,5-dimethoxy-4-iodoamphetamine (DOI) enhanced a head-twitch response (HTR) in OBX mice. Effects of 5-HT(2A), 5-HT(2C) antagonists and fluvoxamine were observed in OBX mice following DOI administration. KEY FINDINGS The HTR elicited by the administration of DOI (0.5 mg/kg and 1 mg/kg, i.p.) was increased about twofold in OBX mice when compared with controls on the 14th day after the surgery. The injection of ketanserin (0.025 mg/kg, i.p.), a 5-HT(2A) receptor antagonist, inhibited the enhancement of the DOI-induced HTR after OBX. Likewise, the administration of SB 242084 (1 mg/kg, s.c.), a 5-HT(2C) receptor antagonist, also inhibited the DOI-induced HTR in OBX mice. Chronic but not acute treatment with the antidepressant fluvoxamine, a selective serotonin reuptake inhibitor (SSRI), suppressed the enhancement of DOI-induced HTR after OBX. SIGNIFICANCE These findings indicate that OBX, and the subsequent degeneration of neurons projecting from the olfactory bulb, caused a supersensitivity of 5-HT(2A/2C) receptors which may be involved in symptoms of depression.
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Affiliation(s)
- Akira Oba
- Department of Pharmacology, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
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Daiyasu H, Nemoto W, Toh H. Evolutionary Analysis of Functional Divergence among Chemokine Receptors, Decoy Receptors, and Viral Receptors. Front Microbiol 2012; 3:264. [PMID: 22855685 PMCID: PMC3405870 DOI: 10.3389/fmicb.2012.00264] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Accepted: 07/05/2012] [Indexed: 01/10/2023] Open
Abstract
Chemokine receptors (CKRs) function in the inflammatory response and in vertebrate homeostasis. Decoy and viral receptors are two types of CKR homologs with modified functions from those of the typical CKRs. The decoy receptors are able to bind ligands without signaling. On the other hand, the viral receptors show constitutive signaling without ligands. We examined the sites related to the functional difference. At first, the decoy and viral receptors were each classified into five groups, based on the molecular phylogenetic analysis. A multiple amino acid sequence alignment between each group and the CKRs was then constructed. The difference in the amino acid composition between the group and the CKRs was evaluated as the Kullback-Leibler (KL) information value at each alignment site. The KL information value is considered to reflect the difference in the functional constraints at the site. The sites with the top 5% of KL information values were selected and mapped on the structure of a CKR. The comparisons with decoy receptor groups revealed that the detected sites were biased on the intracellular side. In contrast, the sites detected from the comparisons with viral receptor groups were found on both the extracellular and intracellular sides. More sites were found in the ligand binding pocket in the analyses of the viral receptor groups, as compared to the decoy receptor groups. Some of the detected sites were located in the GPCR motifs. For example, the DRY motif of the decoy receptors was often degraded, although the motif of the viral receptors was basically conserved. The observations for the viral receptor groups suggested that the constraints in the pocket region are loose and that the sites on the intracellular side are different from those for the decoy receptors, which may be related to the constitutive signaling activity of the viral receptors.
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Affiliation(s)
- Hiromi Daiyasu
- Department of Bioinformatic Engineering, Graduate School of Information Science and Technology, Osaka University Osaka, Japan
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Nemoto W, Toh H. Functional region prediction with a set of appropriate homologous sequences--an index for sequence selection by integrating structure and sequence information with spatial statistics. BMC Struct Biol 2012; 12:11. [PMID: 22643026 PMCID: PMC3533907 DOI: 10.1186/1472-6807-12-11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 04/19/2012] [Indexed: 11/17/2022]
Abstract
Background The detection of conserved residue clusters on a protein structure is one of the effective strategies for the prediction of functional protein regions. Various methods, such as Evolutionary Trace, have been developed based on this strategy. In such approaches, the conserved residues are identified through comparisons of homologous amino acid sequences. Therefore, the selection of homologous sequences is a critical step. It is empirically known that a certain degree of sequence divergence in the set of homologous sequences is required for the identification of conserved residues. However, the development of a method to select homologous sequences appropriate for the identification of conserved residues has not been sufficiently addressed. An objective and general method to select appropriate homologous sequences is desired for the efficient prediction of functional regions. Results We have developed a novel index to select the sequences appropriate for the identification of conserved residues, and implemented the index within our method to predict the functional regions of a protein. The implementation of the index improved the performance of the functional region prediction. The index represents the degree of conserved residue clustering on the tertiary structure of the protein. For this purpose, the structure and sequence information were integrated within the index by the application of spatial statistics. Spatial statistics is a field of statistics in which not only the attributes but also the geometrical coordinates of the data are considered simultaneously. Higher degrees of clustering generate larger index scores. We adopted the set of homologous sequences with the highest index score, under the assumption that the best prediction accuracy is obtained when the degree of clustering is the maximum. The set of sequences selected by the index led to higher functional region prediction performance than the sets of sequences selected by other sequence-based methods. Conclusions Appropriate homologous sequences are selected automatically and objectively by the index. Such sequence selection improved the performance of functional region prediction. As far as we know, this is the first approach in which spatial statistics have been applied to protein analyses. Such integration of structure and sequence information would be useful for other bioinformatics problems.
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Affiliation(s)
- Wataru Nemoto
- Computational Biology Research Center (CBRC), Advanced Industrial Science and Technology (AIST), AIST Tokyo Waterfront Bio-IT Research Building, 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan.
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Nakagawasai O, Taniguchi R, Tan-No K, Yamadera F, Nemoto W, Yaoita F, Tadano T. Pharmacological evaluation of catalepsy in low calcium and/or magnesium deficient feeding mice. Health (London) 2012. [DOI: 10.4236/health.2012.431172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Obara Y, Nemoto W, Kohno S, Murata T, Kaneda N, Nakahata N. Basic fibroblast growth factor promotes glial cell-derived neurotrophic factor gene expression mediated by activation of ERK5 in rat C6 glioma cells. Cell Signal 2011; 23:666-72. [DOI: 10.1016/j.cellsig.2010.11.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Accepted: 11/25/2010] [Indexed: 10/18/2022]
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Abstract
G-Protein Coupled Receptors (GPCRs) are one of the most important pharmaceutical targets. Recent studies have revealed that many GPCRs form homo- and/or hetero-oligomers. The molecular mechanisms of oligomerization are not fully understood yet, due to the lack of structural data for GPCR complexes. Therefore, accurate interface prediction would accelerate investigations of the molecular mechanisms of oligomerization and signaling via GPCRs. However, interface prediction for GPCR oligomerization is difficult, because the various GPCR subtypes often use different structural regions as their interfaces, even when the subtypes belong to the same subfamily. Previously, we developed a method to predict the interfaces for GPCR oligomerization, which overcomes the difficulty described above. We have now launched a web service, named G-protein coupled Receptors Interaction Partners (GRIP) ( http://grip.cbrc.jp/GRIP/index.html ), to predict the interfaces for GPCR oligomerization. As far as we know, it is the only service to predict the interfaces for GPCR oligomerization.
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Affiliation(s)
- Wataru Nemoto
- Computational Biology Research Center (CBRC), Advanced Industrial Science and Technology (AIST), Koto-ku, Tokyo, Japan.
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