Pharmacology of Neuropeptides: Substance P, Vasoactive Intestinal Peptides, Neuropeptide Y, Calcitonin Peptides and Their Receptors

Nimer, Nabil Awni; Ismael, Najlaa Saadi; Abdo, Ruwaida W.; Alkhammas, Sura Yasir Taha; Aga, Qutaiba A. Alkhames

doi:10.1007/978-981-15-3556-7_15

Cited by 1 publication

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References 118 publications

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“…Alteration of gut microbiota has been associated with several disorders such as IBD, in which changes of gut-associated neuropeptides have also been detected (Sanz and El Aidy 2019 ). Interestingly, neuropeptides are acknowledged as mediators in orchestrating the microbiota-gut-brain axis (Holzer and Farzi 2014 ; Hansen and Sartor 2015 ; Schalla and Stengel 2018 ) and immunomodulation (Chen et al 2020 ; Nimer et al 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Protective Effects of Phoenixin-14 Peptide in the Indomethacin-Induced Duodenal Ulcer: An Experimental Study

Zandeh-Rahimi

Panahi

Hesaraki

et al. 2022

Int J Pept Res Ther

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Phoenixin-14‎ (PNX‎-14‎) is a newly identified neuropeptide with potential anti-inflammatory effects in the gastrointestinal tract. In this study, we evaluated the protective effect of PNX-14 against the formation of experimental indomethacin (IND)-induced duodenal ulcer. Thirty-two‎ male Sprague-Dawley rats were randomly assigned to the four following study groups: (1) negative control (2) IND (7.5 mg/kg subcutaneous IND), (3) famotidine (FA) (7.5 mg/kg subcutaneous IND followed by 40 mg/kg intraperitoneal‎ FA), and (4) PNX-14 (7.5 mg/kg subcutaneous IND followed by 50 µ/kg intraperitoneal‎ PNX-14). Outcome measures included macroscopic evaluation of duodenal lesion, serum levels of IL-1ß, TNF-α, IL-6, and IL-12, and tissue biochemical parameters of oxidative stress, including malondialdehyde (MDA)‎‏,‏‎ myeloperoxidase ‎‎(MPO) activity, superoxide dismutase (SOD) ‎activity, and catalase activity. Results The macroscopic grade of duodenal lesions were significantly smaller in the PNX-14 group than in the IND group (p < 0.001). Serum inflammatory cytokines were significantly increased in the IND group. PNX-14 treatment significantly decreased the serum levels of inflammatory cytokines (p < 0.0001). Oxidative contents (MDA and MPO activity) were significantly smaller in the PNX-14 group compared with the IND group (p < 0.0001), while anti-oxidative contents (SOD and catalase activity) were significantly more (p < 0.0001). PNX-14 was superior to FA in several anti-inflammatory properties, such as inhibiting the release of inflammatory cytokines and increasing the catalase activity. PNX-14 showed significant protective effects against the formation of IND-induced duodenal ulcers. These results suggest a promising therapeutic implication for PNX-14 in the treatment of gastrointestinal inflammatory disorders.

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