Neuropeptide W Exhibits Preventive and Therapeutic Effects on Acetic Acid-Induced Colitis via Modulation of the Cyclooxygenase Enzyme System.


Journal

Digestive diseases and sciences
ISSN: 1573-2568
Titre abrégé: Dig Dis Sci
Pays: United States
ID NLM: 7902782

Informations de publication

Date de publication:
06 2023
Historique:
received: 13 09 2022
accepted: 21 12 2022
medline: 18 5 2023
pubmed: 12 1 2023
entrez: 11 1 2023
Statut: ppublish

Résumé

The novel peptide neuropeptide W (NPW) was originally shown to function in the control of feeding behavior and energy homeostasis. The aim of this study was to elucidate the putative preventive and therapeutic effects of NPW on colitis-associated oxidative injury and the underlying mechanisms for its action. Sprague-Dawley rats in the acute colitis groups received NPW (0.5, 1 or 5 µg/kg/day) injections prior to induction of colitis with acetic acid, while the chronic colitis groups were treated after the induction of colitis. In both acute and chronic colitis (CC) groups, treatments were continued for 5 days and the rats were decapitated at the 24th hour of the last injections and colon tissues were collected for assessments. NPW pretreatment given for 5 days before colitis induction, as well as treating rats with NPW during the 5-day course of CC, abolished colonic lipid peroxidation. NPW treatment prevented colitis-induced reduction in blood flow, diminished neutrophil infiltration, and pro-inflammatory cytokine responses. NPW pretreatment only at the higher dose reduced colonic edema and microscopic score and preserved colonic glutathione stores. Elevations in cyclooxygenase (COX) enzyme activity and COX-1 protein level during the acute phase of colitis as well as reduction in COX-2 were all reversed with NPW pretreatment. In contrast, NPW treatment was effective in reducing the elevated COX-2 concentration during the chronic phase. NPW alleviates acetic acid-induced oxidative colonic injury in rats through the upregulation of colonic blood flow as well as the inhibition of COX-2 protein expression and pro-inflammatory cytokine production.

Sections du résumé

BACKGROUND
The novel peptide neuropeptide W (NPW) was originally shown to function in the control of feeding behavior and energy homeostasis. The aim of this study was to elucidate the putative preventive and therapeutic effects of NPW on colitis-associated oxidative injury and the underlying mechanisms for its action.
METHODS
Sprague-Dawley rats in the acute colitis groups received NPW (0.5, 1 or 5 µg/kg/day) injections prior to induction of colitis with acetic acid, while the chronic colitis groups were treated after the induction of colitis. In both acute and chronic colitis (CC) groups, treatments were continued for 5 days and the rats were decapitated at the 24th hour of the last injections and colon tissues were collected for assessments.
RESULTS
NPW pretreatment given for 5 days before colitis induction, as well as treating rats with NPW during the 5-day course of CC, abolished colonic lipid peroxidation. NPW treatment prevented colitis-induced reduction in blood flow, diminished neutrophil infiltration, and pro-inflammatory cytokine responses. NPW pretreatment only at the higher dose reduced colonic edema and microscopic score and preserved colonic glutathione stores. Elevations in cyclooxygenase (COX) enzyme activity and COX-1 protein level during the acute phase of colitis as well as reduction in COX-2 were all reversed with NPW pretreatment. In contrast, NPW treatment was effective in reducing the elevated COX-2 concentration during the chronic phase.
CONCLUSIONS
NPW alleviates acetic acid-induced oxidative colonic injury in rats through the upregulation of colonic blood flow as well as the inhibition of COX-2 protein expression and pro-inflammatory cytokine production.

Identifiants

pubmed: 36631709
doi: 10.1007/s10620-022-07811-2
pii: 10.1007/s10620-022-07811-2
doi:

Substances chimiques

Cyclooxygenase 2 EC 1.14.99.1
Acetic Acid Q40Q9N063P
Cytokines 0
Peroxidase EC 1.11.1.7
Neuropeptides 0

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

2441-2453

Informations de copyright

© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

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Auteurs

Sevil Arabacı Tamer (S)

Department of Physiology, Marmara University School of Medicine, Basibüyük Mah. Maltepe Basibüyük Yolu No. 9/1, Maltepe, 34854, Istanbul, Turkey.
Department of Physiology, Sakarya University School of Medicine, Sakarya, Turkey.

Selin Akbulut (S)

Department of Histology & Embryology, Marmara University School of Medicine, Istanbul, Turkey.

Ömer Erdoğan (Ö)

Department of Biochemistry, Aydın Adnan Menderes University Faculty of Medicine, Aydın, Turkey.

Özge Çevik (Ö)

Department of Biochemistry, Aydın Adnan Menderes University Faculty of Medicine, Aydın, Turkey.

Feriha Ercan (F)

Department of Histology & Embryology, Marmara University School of Medicine, Istanbul, Turkey.

Berrak Ç Yeğen (BÇ)

Department of Physiology, Marmara University School of Medicine, Basibüyük Mah. Maltepe Basibüyük Yolu No. 9/1, Maltepe, 34854, Istanbul, Turkey. byegen@marmara.edu.tr.

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