Epigallocatechin-3-gallate promotes apoptosis in human breast cancer T47D cells through down-regulation of PI3K/AKT and Telomerase
PHARMACOLOGICAL REPORTS
Authors: Moradzadeh, Maliheh; Hosseini, Azar; Erfanian, Saiedeh; Rezaei, Hadi
Abstract
Background: Green tea has antioxidant, anti-tumor and anti-bacterial properties. Epigallocatechin-3-gallate (EGCG) in green tea is highly active as a cancer chemopreventive agent. In this study, we designed a series of experiments to examine the effects of EGCG on proliferation and apoptosis of estrogen receptor a-positive breast cancer (T47D) cells. Methods: Cells were treated with EGCG (0-80 mu M) and tamoxifen (0-20 mu M), as the positive control, up to 72 h. Cell viability was determined by MTT assay. Apoptosis investigated by real time PCR of apoptosis and survival (Bax, Bcl-2, p21, p53, PTEN, PI3 K, AKT, caspase3 and caspase9 and hTERT) genes and by western blot of Bax/Bcl-2 proteins expressions. Results: The results showed that EGCG decreased cell viability as concentration-and time-dependently. IC50 values were 14.17 mu M for T47D and 193.10 mM for HFF cells, as compared with 3.39 mu M and 32.75 mu M for tamoxifen after 72 h treatment, respectively. Also, EGCG (80 mM) significantly increased the genes of PTEN, CASP3, CASP9 and decreased AKT approximately equal to tamoxifen. In gene expression, EGCG (80 mM) significantly increased Bax/Bcl-2 ratio to 8-fold vise 15-fold in tamoxifen (20 mu M)-treated T47D cells during 72 h. In protein expression of Bax/Bcl-2, EGCG significantly increased 6-fold while this ratio augmented 10-fold in tamoxifen group. EGCG significantly decreased 0.8, 0.4 and 0.3 gene expression of hTERT in 24, 48 and 72 h, respectively. Conclusions: This study suggests that EGCG may be a useful adjuvant therapeutic agent for the treatment of breast cancer. (c) 2017 Institute of Pharmacology, Polish Academy of Sciences. Published by Elsevier Sp. z o.o. All rights reserved.
Analysis of sequence data to identify potential risk variants for oral clefts in multiplex families
MOLECULAR GENETICS & GENOMIC MEDICINE
Authors: Holzinger, Emily R.; Li, Qing; Parker, Margaret M.; Hetmanski, Jacqueline B.; Marazita, Mary L.; Mangold, Elisabeth; Ludwig, Kerstin U.; Taub, Margaret A.; Begum, Ferdouse; Murray, Jeffrey C.; Albacha-Hejazi, Hasan; Alqosayer, Khalid; Al-Souki, Giath; Hejazi, Abdullatiff Albasha; Scott, Alan F.; Beaty, Terri H.; Bailey-Wilson, Joan E.
Abstract
BackgroundNonsyndromic oral clefts are craniofacial malformations, which include cleft lip with or without cleft palate. The etiology for oral clefts is complex with both genetic and environmental factors contributing to risk. Previous genome-wide association (GWAS) studies have identified multiple loci with small effects; however, many causal variants remain elusive. MethodsIn this study, we address this by specifically looking for rare, potentially damaging variants in family-based data. We analyzed both whole exome sequence (WES) data and whole genome sequence (WGS) data in multiplex cleft families to identify variants shared by affected individuals. ResultsHere we present the results from these analyses. Our most interesting finding was from a single Syrian family, which showed enrichment of nonsynonymous and potentially damaging rare variants in two genes: CASP9 and FAT4. ConclusionNeither of these candidate genes has previously been associated with oral clefts and, if confirmed as contributing to disease risk, may indicate novel biological pathways in the genetic etiology for oral clefts.