Development of lupine and chickpea-based beverage as a functional food  against colorectal cancer

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Deflamin Attenuated Lung Tissue Damage in an Ozone-Induced COPD Murine Model by Regulating MMP-9 Catalytic Activity

Publication . Baltazar-García, Elia Ana; Vargas-Guerrero, Belinda; Lima, Ana; Ferreira, Ricardo Boavida; Mendoza-Magaña, María Luisa; Ramírez-Herrera, Mario Alberto; Baltazar-Díaz, Tonatiuh Abimael; Domínguez-Rosales, José Alfredo; Salazar-Montes, Adriana María; Gurrola-Díaz, Carmen Magdalena

Chronic obstructive pulmonary disease (COPD) is comprised of histopathological alter- ations such as pulmonary emphysema and peribronchial fibrosis. Matrix metalloproteinase 9 (MMP-9) is one of the key enzymes involved in both types of tissue remodeling during the development of lung damage. In recent studies, it was demonstrated that deflamin, a protein component extracted from Lupinus albus, markedly inhibits the catalytic activity of MMP-9 in experimental models of colon adenocarcinoma and ulcerative colitis. Therefore, in the present study, we investigated for the first time the biological effect of deflamin in a murine COPD model induced by chronic exposure to ozone. Ozone exposure was carried out in C57BL/6 mice twice a week for six weeks for 3 h each time, and the treated group was orally administered deflamin (20 mg/kg body weight) after each ozone exposure. The histological results showed that deflamin attenuated pulmonary emphysema and peribronchial fibrosis, as evidenced by H&E and Masson’s trichrome staining. Furthermore, deflamin administration significantly decreased MMP-9 activity, as assessed by fluorogenic substrate assay and gelatin zymography. Interestingly, bioinformatic analysis reveals a plausible interaction between deflamin and MMP-9. Collectively, our findings demonstrate the therapeutic potential of deflamin in a COPD murine model, and suggest that the attenuation of the development of lung tissue damage occurs by deflamin-regulated MMP-9 catalytic activity.

2024-05Journal article

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