Peptides in common bean fractions inhibit human colorectal cancer cells
FOOD CHEMISTRY
Authors: Luna Vital, Diego A.; de Mejia, Elvira Gonzalez; Dia, Vermont P.; Loarca-Pina, Guadalupe
Abstract
The aim of this study was to characterize peptides present in common bean non-digestible fractions (NDF) produced after enzymatic digestion and determine their antiproliferative action on human colorectal cancer cells. Five NDF peptides represented 70% of total protein (GLTSK, LSGNK, GEGSGA, MPACGSS and MTEEY) with antiproliferative activity on human colon cancer cells. Based on the antiproliferative effect, HCT116 cell line was most sensitive to bean Azufrado Higuera (IC50=0.53 mg/ml) and RKO to Bayo Madero (IC50=0.51 mg/ml) peptide extracts. Both cultivars increased significantly (p < 0.05) the expression of p53 in HCT116 by 76% and 68%, respectively. Azufrado Higuera modified the expression of cell cycle regulation proteins p21 and cyclin B1. Bayo Madero modified the expression of mitochondrial activated apoptotic proteins BAD, cytC, c-casp3, Survivin, BIRC7. Results suggest that peptides present in common bean NDF contributed to the antiproliferative effect on human colorectal cancer cells by modifying molecules involved in either cell cycle arrest or apoptosis. (C) 2014 Elsevier Ltd. All rights reserved.
Expression of inhibitor of apoptosis protein (IAP) livin/BIRC7 in acute leukemia in adults: Correlation with prognostic factors and outcome
LEUKEMIA RESEARCH
Authors: El-Mesallamy, Hala O.; Hegab, Hany M.; Kamal, Amany M.
Abstract
The clinical relevance of livin/BIRC7 expression is still controversial in different types of malignancies, therefore this study was designed to evaluate the gene expression of livin in Egyptian adult AML and ALL. Livin expression level was higher in patients with unfavorable prognostic factors at diagnosis in both ALL (p = 0.002) and AML (p = 0.042) and its level was negatively correlated with event free survival (EFS) and overall survival (OS) in both ALL (p < 0.001for both) and AML (p = 0.001 and 0.023 respectively). This study suggests that livin expression is a novel prognostic marker in adult acute leukemia and thus needs to be incorporated into the patient stratification and treatment protocols. (C) 2011 Elsevier Ltd. All rights reserved.