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Tanaka S, Ito S, Shimamoto C, Matsumura H, Inui T, Marunaka Y, Nakahari T. Nitric oxide synthesis stimulated by arachidonic acid accumulation via PPARα in acetylcholine-stimulated gastric mucous cells. Exp Physiol 2021; 106:1939-1949. [PMID: 34216172 DOI: 10.1113/ep089517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/28/2021] [Indexed: 12/13/2022]
Abstract
NEW FINDINGS What is the central question of this study? Arachidonic acid (AA) stimulates NO production in antral mucous cells without any increase in [Ca2+ ]i . Given that the intracellular AA concentration is too low to measure, the relationship between AA accumulation and NO production remains uncertain. Is AA accumulation a key step for NO production? What is the main finding and its importance? We demonstrated that AA accumulation is a key step for NO production. The amount of AA released could be measured using fluorescence-HPLC. The intracellular AA concentration was maintained at < 1 μM. Nitric oxide is produced by AA accumulation in antral mucous cells, not as a direct effect of [Ca2+ ]i . ABSTRACT In the present study, we demonstrate that NO production is stimulated by an accumulation of arachidonic acid (AA) mediated via peroxisome proliferation-activated receptor α (PPARα) and that the NO produced enhances Ca2+ -regulated exocytosis in ACh-stimulated antral mucous cells. The amount of AA released from the antral mucosa, measured by fluorescence high-performance liquid chromatography (F-HPLC), was increased by addition of ionomycin (10 μM) or ACh, suggesting that AA accumulation is stimulated by an increase in [Ca2+ ]i . The AA production was inhibited by an inhibitor of cytosolic phospholipase A2 (cPLA2-inhα). GW6471 (a PPARα inhibitor) and cPLA2-inhα inhibited NO synthesis stimulated by ACh. Moreover, indomethacin, an inhibitor of cyclooxygenase, stimulated AA accumulation and NO production. However, acetylsalicylic acid did not stimulate AA production and NO synthesis. An analogue of AA (AACOCF3) alone stimulated NO synthesis, which was inhibited by GW6471. In antral mucous cells, indomethacin enhanced Ca2+ -regulated exocytosis by increasing NO via PPARα, and the enhancement was abolished by GW6471 and cPLA2-inhα. Thus, AA produced via PLA2 activation is the key step for NO synthesis in ACh-stimulated antral mucous cells and plays important roles in maintaining antral mucous secretion, especially in Ca2+ -regulated exocytosis.
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Affiliation(s)
- Saori Tanaka
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan.,Laboratory of Pharmacotherapy, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Shigenori Ito
- Department of Chemistry, Faculty of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Chikao Shimamoto
- Laboratory of Pharmacotherapy, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Hitoshi Matsumura
- Laboratory of Pharmacotherapy, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Toshio Inui
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan.,Saisei Mirai Clinics, Moriguchi, Japan
| | - Yoshinori Marunaka
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan.,Medical Research Institute, Kyoto Industrial Health Association, Kyoto, Japan.,Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takashi Nakahari
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, Biwako Kusatsu Campus, Ritsumeikan University, Kusatsu, Japan
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Yasuda M, Inui TA, Hirano S, Asano S, Okazaki T, Inui T, Marunaka Y, Nakahari T. Intracellular Cl - Regulation of Ciliary Beating in Ciliated Human Nasal Epithelial Cells: Frequency and Distance of Ciliary Beating Observed by High-Speed Video Microscopy. Int J Mol Sci 2020; 21:ijms21114052. [PMID: 32517062 PMCID: PMC7312665 DOI: 10.3390/ijms21114052] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 05/28/2020] [Accepted: 06/03/2020] [Indexed: 12/12/2022] Open
Abstract
Small inhaled particles, which are entrapped by the mucous layer that is maintained by mucous secretion via mucin exocytosis and fluid secretion, are removed from the nasal cavity by beating cilia. The functional activities of beating cilia are assessed by their frequency and the amplitude. Nasal ciliary beating is controlled by intracellular ions (Ca2+, H+ and Cl-), and is enhanced by a decreased concentration of intracellular Cl- ([Cl-]i) in ciliated human nasal epithelial cells (cHNECs) in primary culture, which increases the ciliary beat amplitude. A novel method to measure both ciliary beat frequency (CBF) and ciliary beat distance (CBD, an index of ciliary beat amplitude) in cHNECs has been developed using high-speed video microscopy, which revealed that a decrease in [Cl-]i increased CBD, but not CBF, and an increase in [Cl-]i decreased both CBD and CBF. Thus, [Cl-]i inhibits ciliary beating in cHNECs, suggesting that axonemal structures controlling CBD and CBF may have Cl- sensors and be regulated by [Cl-]i. These observations indicate that the activation of Cl- secretion stimulates ciliary beating (increased CBD) mediated via a decrease in [Cl-]i in cHNECs. Thus, [Cl-]i is critical for controlling ciliary beating in cHNECs. This review introduces the concept of Cl- regulation of ciliary beating in cHNECs.
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Affiliation(s)
- Makoto Yasuda
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (T.-a.I.); (S.H.)
- Correspondence: (M.Y.); (T.N.); Tel.: +81-75-251-5603 (M.Y.); +81-77-561-3488 (ext. 7554) (T.N.)
| | - Taka-aki Inui
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (T.-a.I.); (S.H.)
| | - Shigeru Hirano
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (T.-a.I.); (S.H.)
| | - Shinji Asano
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Department of Molecular Physiology, Faculty of Pharmaceutical Sciences, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan;
| | - Tomonori Okazaki
- Department of Molecular Physiology, Faculty of Pharmaceutical Sciences, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan;
| | - Toshio Inui
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Saisei Mirai Clinics, Moriguchi 570-0012, Japan
| | - Yoshinori Marunaka
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
- Research Institute for Clinical Physiology, Kyoto Industrial Health Association, Kyoto 604-8472, Japan
| | - Takashi Nakahari
- Research Unit for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan; (S.A.); (T.I.); (Y.M.)
- Correspondence: (M.Y.); (T.N.); Tel.: +81-75-251-5603 (M.Y.); +81-77-561-3488 (ext. 7554) (T.N.)
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3
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Inui TA, Yasuda M, Hirano S, Ikeuchi Y, Kogiso H, Inui T, Marunaka Y, Nakahari T. Enhancement of ciliary beat amplitude by carbocisteine in ciliated human nasal epithelial cells. Laryngoscope 2019; 130:E289-E297. [PMID: 31294840 DOI: 10.1002/lary.28185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/29/2019] [Accepted: 06/24/2019] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Carbocisteine (CCis), a mucoactive agent, is used to improve the symptoms of sinonasal diseases. However, the effect of CCis on nasal ciliary beating remains uncertain. We examined the effects of CCis on ciliary beat distance (CBD, an index of amplitude), and ciliary beat frequency (CBF) in ciliated human nasal epithelial cells (cHNECs) in primary culture. METHODS The cHNECs were prepared from the nasal tissue resected from patients required surgery for chronic sinusitis (CS) or allergic rhinitis (AR). CBD and CBF were measured using videomicroscopy equipped with a high-speed camera. RESULTS CCis increased CBD by 30%, but not CBF, and decreased intracellular Cl- concentration ([Cl- ]i ) in cHNECs. The CCis' actions were mimicked by the Cl- -free NO3 - solution. In contrast, prior treatment of NPPB (20 μM) or CFTR(inh)-172 (1 μM), which increased [Cl- ]i by 20%, decreased CBF by 10% and CBD by 25% and inhibited the CCis' actions. However, prior treatment of T16Ainh-A01 (10 μM) did not inhibit the CCis' actions, although it decreased [Cl- ]i by 10% and CBD by 15%. Thus, CCis stimulates Cl- channels including cystic fibrosis transmembrane conductance regulator (CFTR). Moreover, CCis enhanced the transport of microbeads driven by the beating cilia in cHNECs. The CCis actions were similar in cHNECs from both types of pateints. CONCLUSION CCis increased CBD by 30% in cHNECs via an [Cl- ]i decrease stimulated by activation of Cl- channels, including CFTR. CCis may stimulate nasal mucociliary clearance by increasing CBD in patients contracting CS or AR. LEVEL OF EVIDENCE NA. Laryngoscope, 130:E289-E297, 2020.
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Affiliation(s)
- Taka-Aki Inui
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Makoto Yasuda
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shigeru Hirano
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yukiko Ikeuchi
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Haruka Kogiso
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Toshio Inui
- Research Laboratory for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu, Japan.,Saisei Mirai Clinics, Moriguchi, Japan
| | - Yoshinori Marunaka
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Research Laboratory for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu, Japan.,Research Institute for Clinical Physiology, Kyoto Industrial Health Association, Kyoto, Japan
| | - Takashi Nakahari
- Research Laboratory for Epithelial Physiology, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu, Japan
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Ciliary beating amplitude controlled by intracellular Cl - and a high rate of CO 2 production in ciliated human nasal epithelial cells. Pflugers Arch 2019; 471:1127-1142. [PMID: 31104127 DOI: 10.1007/s00424-019-02280-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/25/2019] [Accepted: 04/29/2019] [Indexed: 12/15/2022]
Abstract
The ciliary transport is controlled by two parameters of the ciliary beating, frequency (CBF) and amplitude. In this study, we developed a novel method to measure both CBF and ciliary bend distance (CBD, an index of ciliary beating amplitude) in ciliated human nasal epithelial cells (cHNECs) in primary culture, which are prepared from patients contracting allergic rhinitis and chronic sinusitis. An application of Cl--free NO3- solution or bumetanide (an inhibitor of Na+/K+/2Cl- cotransport), which decreases intracellular Cl- concentration ([Cl-]i), increased CBD, not CBF, at 37 °C; however, it increased both CBD and CBF at 25 °C. Conversely, addition of Cl- channel blockers (5-nitro-2-(3-phenylpropylamino) benzoic acid (NPPB) and 4-[[4-Oxo-2-thioxo-3-[3-trifluoromethyl]phenyl]-5-thiazolidinylidene]methyl] benzoic acid (CFTR(inh)-172)), which increase [Cl-]i, decreased both CBD and CBF, suggesting that CFTR plays a crucial role for maintaining [Cl-]i in these cells. We speculate that Cl- modulates activities of the molecular motors regulating both CBD and CBF in cHNECs. Moreover, application of the CO2/HCO3--free solution did not change intracellular pH (pHi), and addition of an inhibitor of carbonic anhydrase (acetazolamide) sustained pHi increase induced by the NH4+ pulse, which transiently increased pHi in the absence of acetazolamide. These results indicate that the cHNEC produces a large amount of CO2, which maintains a constant pHi even under the CO2/HCO3--free condition.
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5
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Inui TA, Yasuda M, Hirano S, Ikeuchi Y, Kogiso H, Inui T, Marunaka Y, Nakahari T. Daidzein-Stimulated Increase in the Ciliary Beating Amplitude via an [Cl -] i Decrease in Ciliated Human Nasal Epithelial Cells. Int J Mol Sci 2018; 19:ijms19123754. [PMID: 30486295 PMCID: PMC6321431 DOI: 10.3390/ijms19123754] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 11/22/2018] [Accepted: 11/22/2018] [Indexed: 01/26/2023] Open
Abstract
The effects of the isoflavone daidzein on the ciliary beat distance (CBD, which is a parameter assessing the amplitude of ciliary beating) and the ciliary beat frequency (CBF) were examined in ciliated human nasal epithelial cells (cHNECs) in primary culture. Daidzein decreased [Cl−]i and enhanced CBD in cHNECs. The CBD increase that was stimulated by daidzein was mimicked by Cl−-free NO3− solution and bumetanide (an inhibitor of Na+/K+/2Cl− cotransport), both of which decreased [Cl−]i. Moreover, the CBD increase was inhibited by 5-Nitro-2-(3-phenylpropylamino)benzoic acid (NPPB, a Cl− channel blocker), which increased [Cl−]i. CBF was also decreased by NPPB. The rate of [Cl−]i decrease evoked by Cl−-free NO3− solution was enhanced by daidzein. These results suggest that daidzein activates Cl− channels in cHNECs. Moreover, daidzein enhanced the microbead transport driven by beating cilia in the cell sheet of cHNECs, suggesting that an increase in CBD enhances ciliary transport. An [Cl−]i decrease enhanced CBD, but not CBF, in cHNECs at 37 °C, although it enhanced both at 25 °C. Intracellular Cl− affects both CBD and CBF in a temperature-dependent manner. In conclusion, daidzein, which activates Cl− channels to decrease [Cl−]i, stimulated CBD increase in cHNECs at 37 °C. CBD is a crucial factor that can increase ciliary transport in the airways under physiological conditions.
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Affiliation(s)
- Taka-Aki Inui
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Makoto Yasuda
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Shigeru Hirano
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Yukiko Ikeuchi
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Haruka Kogiso
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | - Toshio Inui
- Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan.
- Saisei Mirai Clinics, Moriguchi 570-0012, Japan.
| | - Yoshinori Marunaka
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
- Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan.
- Research Institute for Clinical Physiology, Kyoto Industrial Health Association, Kyoto 604-8472, Japan.
| | - Takashi Nakahari
- Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, Kusatsu 525-8577, Japan.
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6
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Ikeuchi Y, Kogiso H, Hosogi S, Tanaka S, Shimamoto C, Matsumura H, Inui T, Marunaka Y, Nakahari T. Carbocisteine stimulated an increase in ciliary bend angle via a decrease in [Cl -] i in mouse airway cilia. Pflugers Arch 2018; 471:365-380. [PMID: 30291431 DOI: 10.1007/s00424-018-2212-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/24/2018] [Accepted: 09/25/2018] [Indexed: 12/14/2022]
Abstract
Carbocisteine (CCis), a mucoactive agent, is widely used to improve respiratory diseases. This study demonstrated that CCis increases ciliary bend angle (CBA) by 30% and ciliary beat frequency (CBF) by 10% in mouse airway ciliary cells. These increases were induced by an elevation in intracellular pH (pHi; the pHi pathway) and a decrease in the intracellular Cl- concentration ([Cl-]i; the Cl- pathway) stimulated by CCis. The Cl- pathway, which is independent of CO2/HCO3-, increased CBA by 20%. This pathway activated Cl- release via activation of Cl- channels, leading to a decrease in [Cl-]i, and was inhibited by Cl- channel blockers (5-nitro-2-(3-phenylpropylamino) benzoic acid and CFTR(inh)-172). Under the CO2/HCO3--free condition, the CBA increase stimulated by CCis was mimicked by the Cl--free NO3- solution. The pHi pathway, which depends on CO2/HCO3-, increased CBF and CBA by 10%. This pathway activated HCO3- entry via Na+/HCO3- cotransport (NBC), leading to a pHi elevation, and was inhibited by 4,4'-diisothiocyano-2,2'-stilbenedisulfonic acid. The effects of CCis were not affected by a protein kinase A inhibitor (1 μM PKI-A) or Ca2+-free solution. Thus, CCis decreased [Cl-]i via activation of Cl- channels including CFTR, increasing CBA by 20%, and elevated pHi via NBC activation, increasing CBF and CBA by 10%.
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Affiliation(s)
- Yukiko Ikeuchi
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.,Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan
| | - Haruka Kogiso
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.,Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan
| | - Shigekuni Hosogi
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | - Saori Tanaka
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Chikao Shimamoto
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Hitoshi Matsumura
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Toshio Inui
- Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan.,Saisei Mirai Clinics, Moriguchi, 570-0012, Japan
| | - Yoshinori Marunaka
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan.,Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan.,Research Institute for Clinical Physiology, Kyoto Industrial Health Association, Kyoto, 604-8472, Japan
| | - Takashi Nakahari
- Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, BKC, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan.
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Tanaka S, Hosogi S, Sawabe Y, Shimamoto C, Matsumura H, Inui T, Marunaka Y, Nakahari T. PPARα induced NOS1 phosphorylation via PI3K/Akt in guinea pig antral mucous cells: NO-enhancement in Ca(2+)-regulated exocytosis. Biomed Res 2017; 37:167-78. [PMID: 27356604 DOI: 10.2220/biomedres.37.167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A PPARα (peroxisome proliferation activation receptor α) agonist (GW7647) activates nitric oxide synthase 1 (NOS1) to produce NO leading to cGMP accumulation in antral mucous cells. In this study, we examined how PPARα activates NOS1. The NO production stimulated by GW7647 was suppressed by inhibitors of PI3K (wortmannin) and Akt (AKT 1/2 Kinase Inhibitor, AKT-inh), although it was also suppressed by the inhibitors of PPARα (GW6471) and NOS1 (N-PLA). GW7647 enhanced the ACh (acetylcholine)-stimulated exocytosis (Ca(2+)-regulated exocytosis) mediated via NO, which was abolished by GW6471, N-PLA, wortmannin, and AKT-inh. The Western blotting revealed that GW7647 phosphorylates NOS1 via phosphorylation of PI3K/Akt in antral mucous cells. The immunofluorescence examinations demonstrated that PPARα existing with NOS1 co-localizes with PI3K and Akt in the cytoplasm of antral mucous cells. ACh alone and AACOCF3, an analogue of arachidonic acid (AA), induced the NOS1 phosphorylation via PI3K/Akt to produce NO, which was inhibited by GW6471. Since AA is a natural ligand for PPARα, ACh stimulates PPARα probably via AA. In conclusion, PPARα activates NOS1 via PI3K/Akt phosphorylation to produce NO in antral mucous cells during ACh stimulation.
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Affiliation(s)
- Saori Tanaka
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences
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Tanaka S, Sugiyama N, Takahashi Y, Mantoku D, Sawabe Y, Kuwabara H, Nakano T, Shimamoto C, Matsumura H, Marunaka Y, Nakahari T. PPARα autocrine regulation of Ca²⁺-regulated exocytosis in guinea pig antral mucous cells: NO and cGMP accumulation. Am J Physiol Gastrointest Liver Physiol 2014; 307:G1169-79. [PMID: 25342048 DOI: 10.1152/ajpgi.00311.2013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In antral mucous cells, acetylcholine (ACh, 1 μM) activates Ca(2+)-regulated exocytosis, consisting of a peak in exocytotic events that declines rapidly (initial phase) followed by a second slower decline (late phase) lasting during ACh stimulation. GW7647 [a peroxisome proliferation activation receptor α (PPARα) agonist] enhanced the ACh-stimulated initial phase, and GW6471 (a PPARα antagonist) abolished the GW7647-induced enhancement. However, GW6471 produced the delayed, but transient, increase in the ACh-stimulated late phase, and it also decreased the initial phase and produced the delayed increase in the late phase during stimulation with ACh alone. A similar delayed increase in the ACh-stimulated late phase is induced by an inhibitor of the PKG, Rp8BrPETcGMPS, suggesting that GW6471 inhibits cGMP accumulation. An inhibitor of nitric oxide synthase 1 (NOS1), N(5)-[imino(propylamino)methyl]-L-ornithine hydrochloride (N-PLA), also abolished the GW7647-induced-enhancement of ACh-stimulated initial phase but produced the delayed increase in the late phase. However, in the presence of N-PLA, an NO donor or 8BrcGMP enhanced the ACh-stimulated initial phase and abolished the delayed increase in the late phase. Moreover, GW7647 and ACh stimulated NO production and cGMP accumulation in antral mucosae, which was inhibited by GW6471 or N-PLA. Western blotting and immunohistochemistry revealed that NOS1 and PPARα colocalize in antral mucous cells. In conclusion, during ACh stimulation, a PPARα autocrine mechanism, which accumulates NO via NOS1 leading to cGMP accumulation, modulates the Ca(2+)-regulated exocytosis in antral mucous cells.
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Affiliation(s)
- Saori Tanaka
- Nakahari Project of Central Research Laboratory, Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Nanae Sugiyama
- Nakahari Project of Central Research Laboratory, Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Yuko Takahashi
- Nakahari Project of Central Research Laboratory, Mechanobiology Laboratory, Graduate School of Medicine, Nagoya University, Nagoya, Japan, and
| | - Daiki Mantoku
- Nakahari Project of Central Research Laboratory, Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Yukinori Sawabe
- Nakahari Project of Central Research Laboratory, Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroko Kuwabara
- Nakahari Project of Central Research Laboratory, Department of Pathology, and
| | - Takashi Nakano
- Nakahari Project of Central Research Laboratory, Department of Microbiology and Infection Control, Osaka Medical College, Takatsuki, Japan
| | - Chikao Shimamoto
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Hitoshi Matsumura
- Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan
| | - Yoshinori Marunaka
- Nakahari Project of Central Research Laboratory, Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takashi Nakahari
- Nakahari Project of Central Research Laboratory, Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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9
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Harada S, Tanaka S, Takahashi Y, Matsumura H, Shimamoto C, Nakano T, Kuwabara H, Sawabe Y, Nakahari T. Inhibition of Ca(2+)-regulated exocytosis by levetiracetam, a ligand for SV2A, in antral mucous cells of guinea pigs. Eur J Pharmacol 2013; 721:185-92. [PMID: 24076180 DOI: 10.1016/j.ejphar.2013.09.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 09/14/2013] [Accepted: 09/19/2013] [Indexed: 11/18/2022]
Abstract
Levtiracetam (Lev), an inhibitor of SV2A (synaptic vesicle protein A2), affected the ATP-dependent priming of Ca(2+)-regulated exocytosis in antral mucous cells of guinea pig. In antral mucous cells, the Ca(2+)-regulated exocytosis, which is activated by acetylcholine (ACh), consists of an initial peak that declines rapidly (initial phase) followed by a second slower decline (late phase). Dinitrophenol (DNP), which depletes ATP, inhibits the ATP-dependent priming. DNP abolished the initial phase by reducing the number of primed granules, Lev decreased the frequency of initial phase, but not in the presence of DNP. Moreover, 8-bromoguanosine 3'5'-cyclic monophosphate (8BrcGMP) accelerates the ATP-dependent priming. 8BrcGMP enhances the frequency of initial phase by increasing the number of primed granule. Lev added prior to 8BrcGMP addition decreased the frequency of initial phase, but Lev added after 8BrcGMP addition did not. Thus, Lev affected the granules in the process of priming, but it did not affect the granules already primed. Lev did not affect [Ca(2+)]i in unstimulated or ACh-stimulated antral mucous cells. Immunohistochemistry and western blotting demonstrated that SV2A exists in antral mucous cells. The results suggest that SV2A plays an essential role in maintaining the process of ATP-dependent priming in antral mucous cells. In conclusion, Lev decreases the frequency of Ca(2+)-regulated exocytosis the number of primed granules by inhibiting SV2A functions, leading to a decrease in antral mucous cells.
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Affiliation(s)
- Saeko Harada
- Nakahari Project of Central Research Laboratory, Osaka Medical College, Takatsuki 569-8686, Japan; Laboratory of Pharmacotherapy, Osaka University of Pharmaceutical Sciences, Takatsuki 569-1094, Japan
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10
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Tanaka S, Tanaka R, Harada S, Kohda Y, Matsumura H, Shimamoto C, Sawabe Y, Marunaka Y, Kuwabara H, Takahashi Y, Ito S, Nakahari T. A PKG inhibitor increases Ca(2+)-regulated exocytosis in guinea pig antral mucous cells: cAMP accumulation via PDE2A inhibition. Am J Physiol Gastrointest Liver Physiol 2013; 304:G773-80. [PMID: 23449671 DOI: 10.1152/ajpgi.00281.2012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In antral mucous cells, acetylcholine (ACh, 1 μM) activates Ca(2+)-regulated exocytosis, consisting of an initial peak that declines rapidly (initial transient phase) followed by a second slower decline (late phase) lasting during ACh stimulation. The addition of 8-bromo-cGMP (8-BrcGMP) enhanced the initial phase, which was inhibited by the protein kinase G (PKG) inhibitor guanosine 3',5'-cyclic monophosphorothoiate, β-phenyl-1,N(2)-etheno-8-bromo, Rp-isomer, sodium salt (Rp-8-BrPETcGMPS, 100 nM). However, Rp-8-BrPETcGMPS produced a delayed, but transient, increase in the exocytotic frequency during the late phase that was abolished by a protein kinase A (PKA) inhibitor (PKI-amide), suggesting that Rp-8-BrPETcGMPS accumulates cAMP. The cGMP-dependent phosphodiesterase 2 (PDE2), which degrades cAMP, may exist in antral mucous cells. The PDE2 inhibitor BAY-60-7550 (250 nM) mimicked the effect of Rp-8-BrPETcGMPS on ACh-stimulated exocytosis. Measurement of the cGMP and cAMP contents in antral mucosae revealed that ACh stimulates the accumulation of cGMP and that BAY-60-7550 accumulates cAMP similarly to Rp-8-BrPETcGMPS during ACh stimulation. Analyses of Western blot and immunohistochemistry demonstrated that PDE2A exists in antral mucous cells. In conclusion, Rp-8-BrPETcGMPS accumulates cAMP by inhibiting PDE2 in ACh-stimulated antral mucous cells, leading to the delayed, but transient, increase in the frequency of Ca(2+)-regulated exocytosis. PDE2 may prevent antral mucous cells from excessive mucin secretion caused by the cAMP accumulation.
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Affiliation(s)
- Saori Tanaka
- Nakahari Project of Central Research Laboratory, Osaka Medical College, Takatsuki, Japan
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Luo L, Sun YJ, Yang L, Huang S, Wu YJ. Avermectin induces P-glycoprotein expression in S2 cells via the calcium/calmodulin/NF-κB pathway. Chem Biol Interact 2013; 203:430-9. [DOI: 10.1016/j.cbi.2013.03.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 02/11/2013] [Accepted: 03/09/2013] [Indexed: 01/12/2023]
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12
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Sawabe Y, Shimamoto C, Sakai A, Kuwabara H, Saad AH, Nakano T, Takitani K, Tamai H, Mori H, Marunaka Y, Nakahari T. Peroxisome proliferation activation receptor α modulation of Ca2+-regulated exocytosis via arachidonic acid in guinea-pig antral mucous cells. Exp Physiol 2010; 95:858-68. [DOI: 10.1113/expphysiol.2010.053603] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Mori Y, Watanabe M, Inui T, Nimura Y, Araki M, Miyamoto M, Takenaka H, Kubota T. Ca(2+) regulation of endocochlear potential in marginal cells. J Physiol Sci 2009; 59:355-65. [PMID: 19504169 PMCID: PMC10717738 DOI: 10.1007/s12576-009-0043-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Accepted: 05/02/2009] [Indexed: 11/26/2022]
Abstract
We examined the effect of the cytosolic Ca(2+) concentration ([Ca(2+)](c)) in marginal cells on the asphyxia- or furosemide-induced decrease in the endocochlear potential (EP) by perfusing the endolymph with or without a Ca(2+) chelator or inhibitors of Ca(2+)-permeable channels or Ca(2+)-pump during transient asphyxia or intravenous administration of furosemide. We obtained the following results. (1) Endolymphatic administration of SKF96365 (an inhibitor of TRPC and L-type Ca(2+) channels) or EGTA-acetoxymethyl ester (EGTA-AM) significantly inhibited both the transient asphyxia-induced decrease in EP (TAID) and the furosemide-induced decrease in EP (FUID). (2) Endolymphatic perfusion with nifedipine significantly inhibited the TAID but not the FUID. (3) The recovery from the FUID was significantly suppressed by perfusing the endolymph with EGTA-AM, nifedipine, or SKF96365. (4) Endolymphatic administration of thapsigargin inhibited both the FUID and TAID. (5) The recovery rate from the FUID was much slower than that from the TAID, indicating that furosemide may inhibit the Ca(2+)-pump. (6) A strong reaction in immunohistochemical staining for TRPC channels was observed in the luminal and basolateral membranes of marginal cells. (7) A positive staining reaction for the gamma subunit of epithelial Na(+) channels was observed in the luminal and basolateral membranes of marginal cells. (8) Positive EP was diminished toward 0 mV by the endolymphatic perfusion with 10 muM amiloride or 10 muM phenamil. Taken together, these findings suggest that [Ca(2+)](c) regulated by endoplasmic Ca(2+)-pump and Ca(2+)-permeable channels in marginal cells may regulate the positive EP, which is partly produced by the diffusion potential of Na(+) across the basolateral membrane in marginal cells.
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Affiliation(s)
- Yoshiaki Mori
- Department of Physiology II, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Osaka, 569-8686 Japan
| | - Masahito Watanabe
- Department of Anatomy and Cell Biology, Osaka Medical College, Takatsuki, Osaka, 569-8686 Japan
| | - Takaki Inui
- Department of Otolaryngology, Osaka Medical College, Takatsuki, Osaka, 569-8686 Japan
| | - Yoshitsugu Nimura
- Department of Otolaryngology, Osaka Medical College, Takatsuki, Osaka, 569-8686 Japan
| | - Michitoshi Araki
- Department of Otolaryngology, Osaka Medical College, Takatsuki, Osaka, 569-8686 Japan
| | - Manabu Miyamoto
- Department of Physiology II, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Osaka, 569-8686 Japan
| | - Hiroshi Takenaka
- Department of Otolaryngology, Osaka Medical College, Takatsuki, Osaka, 569-8686 Japan
| | - Takahiro Kubota
- Department of Physiology II, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Osaka, 569-8686 Japan
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