Tepary Bean (Phaseolus acutifolius) Lectins Induce Apoptosis and Cell Arrest in G0/G1 by P53(Ser46) Phosphorylation in Colon Cancer Cells

Molecules

Alejandro Blanco-Labra¹  F.Josué López-Martínez²  Ricardo Cervantes-Jiménez²  RobertoAugusto Ferríz-Martínez²  Ulisses Moreno-Celis²  Teresa García-Gasca² 

[1] Depto de Biotecnología y Bioquímica, Centro de Investigación y de estudios Avanzados del IPN-Unidad Irapuato, Guanajuato CP 36821, Mexico;Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. de las Ciencias s/n. Juriquilla, Querétaro CP 76230, Mexico;

关键词: apoptosis;    colon cancer;    lectins;    p53;    phaseolus acutifolius;   

DOI  :  10.3390/molecules25051021

来源: DOAJ

【 摘 要 】

A Tepary bean lectin fraction (TBLF) has been studied because it exhibits differential cytotoxic and anticancer effects on colon cancer. The present work focuses on the evaluation of the apoptotic mechanism of action on colon cancer cells. Initially, lethal concentrations (LC₅₀) were obtained for the three studied cell lines (HT-29, RKO and SW-480). HT-29 showed the highest LC₅₀, 10 and 100 times higher than that of RKO and SW-480 cells, respectively. Apoptosis was evaluated by flow cytometry, where HT-29 cells showed the highest levels of early and total apoptosis, caspases activity was confirmed and necrosis was discarded. The effect on cell cycle arrest was shown in the G0/G1 phase. Specific apoptosis-related gene expression was determined, where an increase in p53 and a decrease in Bcl-2 were observed. Expression of p53 gene showed the maximum level at 8 h with an important decrease at 12 and 24 h, also the phosphorylated p53(ser46) increased at 8 h. Our results show that TBLF induces apoptosis in colon cancer cells by p-p53(ser46) involvement. Further studies will focus on studying the specific signal transduction pathway.

【 授权许可】

Unknown