Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus
It has been reported that adiponectin (ADPN) and resistin are co-secreted by white mouse adipocytes and exert similar inhibitory effects in the mouse gastric fundus, in which resistin was observed to increase neuronal nitric oxide synthase (nNOS) expression. On these grounds, the present work aimed...
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MDPI AG
2022-12-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/23/24/16113 |
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| author | Eglantina Idrizaj Silvia Nistri Virginia Zizi Maria Caterina Baccari |
| author_facet | Eglantina Idrizaj Silvia Nistri Virginia Zizi Maria Caterina Baccari |
| author_sort | Eglantina Idrizaj |
| collection | DOAJ |
| description | It has been reported that adiponectin (ADPN) and resistin are co-secreted by white mouse adipocytes and exert similar inhibitory effects in the mouse gastric fundus, in which resistin was observed to increase neuronal nitric oxide synthase (nNOS) expression. On these grounds, the present work aimed to investigate whether the effects of the two adipokines on the neurally-induced relaxant responses potentiate each other and whether there is a possible correlation with changes in nNOS expression in preparations from the mouse gastric fundus. In carbachol (CCh)-precontracted strips, electrical field stimulation elicited nitrergic relaxant responses, whose amplitude was increased by ADPN or resistin, but no additional enhancements were observed in their concomitant presence. Western blot and immunofluorescence analyses revealed that ADPN, like resistin, was able to up-regulate nNOS expression and to increase the percentage of nNOS-positive neurons in the myenteric plexus: co-treatment with the two adipokines did not induce additional changes. The results indicate that the two adipokines modulate nitrergic neurotransmission, and both do so by up-regulating nNOS expression. Therefore, nNOS appears to be a shared target for the two adipokines’ effects, which, rather than mutually reinforcing each other, may represent a dual physiological control mechanism to guarantee gastric fundus relaxation. |
| first_indexed | 2024-03-09T16:19:05Z |
| format | Article |
| id | doaj.art-b8a52761a607451da77bd241da5b1322 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-09T16:19:05Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-b8a52761a607451da77bd241da5b13222023-11-24T15:33:08ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672022-12-0123241611310.3390/ijms232416113Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric FundusEglantina Idrizaj0Silvia Nistri1Virginia Zizi2Maria Caterina Baccari3Department of Experimental & Clinical Medicine, Section of Physiological Sciences, University of Florence, 50134 Florence, ItalyDepartment of Experimental & Clinical Medicine, Research Unit of Histology & Embryology, University of Florence, 50139 Florence, ItalyDepartment of Experimental & Clinical Medicine, Research Unit of Histology & Embryology, University of Florence, 50139 Florence, ItalyDepartment of Experimental & Clinical Medicine, Section of Physiological Sciences, University of Florence, 50134 Florence, ItalyIt has been reported that adiponectin (ADPN) and resistin are co-secreted by white mouse adipocytes and exert similar inhibitory effects in the mouse gastric fundus, in which resistin was observed to increase neuronal nitric oxide synthase (nNOS) expression. On these grounds, the present work aimed to investigate whether the effects of the two adipokines on the neurally-induced relaxant responses potentiate each other and whether there is a possible correlation with changes in nNOS expression in preparations from the mouse gastric fundus. In carbachol (CCh)-precontracted strips, electrical field stimulation elicited nitrergic relaxant responses, whose amplitude was increased by ADPN or resistin, but no additional enhancements were observed in their concomitant presence. Western blot and immunofluorescence analyses revealed that ADPN, like resistin, was able to up-regulate nNOS expression and to increase the percentage of nNOS-positive neurons in the myenteric plexus: co-treatment with the two adipokines did not induce additional changes. The results indicate that the two adipokines modulate nitrergic neurotransmission, and both do so by up-regulating nNOS expression. Therefore, nNOS appears to be a shared target for the two adipokines’ effects, which, rather than mutually reinforcing each other, may represent a dual physiological control mechanism to guarantee gastric fundus relaxation.https://www.mdpi.com/1422-0067/23/24/16113nitric oxideresistinadiponectingastric fundusnNOS expressionadipokines |
| spellingShingle | Eglantina Idrizaj Silvia Nistri Virginia Zizi Maria Caterina Baccari Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus International Journal of Molecular Sciences nitric oxide resistin adiponectin gastric fundus nNOS expression adipokines |
| title | Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus |
| title_full | Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus |
| title_fullStr | Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus |
| title_full_unstemmed | Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus |
| title_short | Neuronal Nitric Oxide Synthase as a Shared Target for the Effects of Adiponectin and Resistin on the Mechanical Responses of the Mouse Gastric Fundus |
| title_sort | neuronal nitric oxide synthase as a shared target for the effects of adiponectin and resistin on the mechanical responses of the mouse gastric fundus |
| topic | nitric oxide resistin adiponectin gastric fundus nNOS expression adipokines |
| url | https://www.mdpi.com/1422-0067/23/24/16113 |
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