Proteins from Plumeria pudica latex exhibit protective effect in acetic acid induced colitis in mice by inhibition of pro-inflammatory mechanisms and oxidative stress

• Published in: Life sciences (1973) 2019-08, Vol.231, p.116535-116535, Article 116535
• Main Authors: Oliveira, Naylla Veras de Moraes, Souza, Bruna da Silva, Moita, Lucas Arruda, Oliveira, Lucas Eduardo Silva, Brito, Felipe Cardoso, Magalhães, Diva Aguiar, Batista, Jalles Arruda, Sousa, Stefany Guimarães, Brito, Tarcísio Vieira de, Sousa, Francisca Beatriz de Melo, Alves, Even Herlany Pereira, Vasconcelos, Daniel Fernando Pereira, Freitas, Cleverson Diniz Teixeira de, Ramos, Márcio Viana, Barbosa, André Luiz dos Reis, Oliveira, Jefferson Soares de
• Format: Article
• Language: English
• Subjects: Acetic acid; Acids; Animals; Anti-inflammatory agents; Biochemical investigation; Colon; Cytokines; Glutathione; IL-1β; Inflammatory bowel disease; Inflammatory bowel diseases; Inhibition; Interleukin 1; Interleukin 1 beta; Intestine; Latex; Laticifer proteins; Lesions; Malondialdehyde; Mice; Oxidative stress; Peroxidase; Protective effect; Proteinase; Proteinase inhibitors; Proteins; Superoxide dismutase; Ulcerative colitis; Weight
• ISSN: 0024-3205; 1879-0631
• DOI: 10.1016/j.lfs.2019.06.010

Latex proteins from P. pudica (LPPp) have anti-inflammatory activity. In the present study, LPPp was evaluated to protect animals against inflammatory ulcerative colitis (UC). UC was induced by intracolonic instillation of a 6% acetic acid solution and the animals received LPPp (10, 20 or 40 mg/kg) by intraperitoneal route 1 h before and 17 h after acetic acid injection. Eighteen hours after instillation of acetic acid, the mice were euthanized and the colons were excised to determine the wet weight, macroscopic and microscopic lesion scores, myeloperoxidase (MPO) activity, IL1-β levels, glutathione (GSH) and malondialdehyde (MDA) concentration and superoxide dismutase (SOD) activity. The results revealed that LPPp treatment (40 mg/kg) had a protective effect on acetic acid-induced colitis by reducing the wet weight, macroscopic and microscopic scores of intestinal lesions and colonic MPO activity. Additionally, LPPp inhibited tissue oxidative stress, since decreases in GSH consumption, MDA concentration and SOD activity were observed. The treatment with LPPp reduced the levels of cytokine IL-1β, contributing to the reduction of colon inflammation. Biochemical investigation showed that LPPp comprises a mixture of proteins containing proteinases, chitinases and proteinase inhibitors. These data suggest that LPPp has a protective effect against intestinal damage through mechanisms that involve the inhibition of inflammatory cell infiltration, cytokine release and oxidative stress. [Display omitted] •Latex proteins from Plumeria pudica (LPPp) have protective effect against intestinal damage induced by acetic acid.•Mice treated with LPPp presented significant reduction in severity of macroscopic and microscopic intestinal damage.•The protective effect involves inhibition of inflammatory cell infiltration, cytokine release and oxidative stress.