1. Gastroprotective and antielastase effects of protein inhibitors from Erythrina velutina seeds in an experimental ulcer model.
- Author
-
Oliveira de Lima VC, de Araújo Machado RJ, Vieira Monteiro NK, de Lyra IL, da Silva Camillo C, Coelho Serquiz A, Silva de Oliveira A, da Silva Rufino FP, Leal Lima Maciel B, Ferreira Uchôa A, Antunes Dos Santos E, and de Araújo Morais AH
- Subjects
- Animals, Anti-Inflammatory Agents isolation & purification, Disease Models, Animal, Enzyme Inhibitors isolation & purification, Ethanol, Female, Gastric Mucosa drug effects, Gastric Mucosa enzymology, Gastric Mucosa pathology, Gastrointestinal Agents isolation & purification, Humans, Leukocyte Elastase antagonists & inhibitors, Leukocyte Elastase metabolism, Plant Extracts chemistry, Ranitidine pharmacology, Rats, Rats, Wistar, Seeds chemistry, Stomach Ulcer chemically induced, Stomach Ulcer enzymology, Stomach Ulcer pathology, Anti-Inflammatory Agents pharmacology, Enzyme Inhibitors pharmacology, Erythrina chemistry, Gastrointestinal Agents pharmacology, Phytotherapy, Stomach Ulcer prevention & control
- Abstract
Trypsin and chymotrypsin inhibitors from Erythrina velutina seeds have been previously isolated by our group. In previous studies using a sepsis model, we demonstrated the antitumor and anti-inflammatory action of these compounds. This study aimed to evaluate the gastroprotective and antielastase effects of protein inhibitors from E. velutina seeds in an experimental stress-induced ulcer model. Two protein isolates from E. velutina seeds, with antitrypsin (PIAT) and antichymotrypsin (PIAQ) activities, were tested. Both protein isolates showed a high affinity and inhibitory effect against human neutrophil elastase, with 84% and 85% inhibition, respectively. Gastric ulcer was induced using ethanol (99%) in 6 groups of animals (female Wistar rats, n = 6). Before ulcer induction, these animals were treated for 5 days with one of the following: (1) PIAT (0.2 mg·kg
-1 ), (2) PIAT (0.4 mg·kg-1 ), (3) PIAQ (0.035 mg·kg-1 ), (4) ranitidine hydrochloride (50 mg·kg-1 ), (5) saline solution (0.9%), or (6) no intervention (sham). Both PIAT and PIAQ protected gastric mucosa, preventing hemorrhagic lesions, edema, and mucus loss. No histologic toxic effects of PIAT or PIAQ were seen in liver and pancreatic cells. Our results show that protein isolates from E. velutina seeds have potential gastroprotective effects, placing these compounds as natural candidates for gastric ulcer prevention.- Published
- 2017
- Full Text
- View/download PDF