Open AccessCapturing Drug Responses by Quantitative Promoter Activity Profiling
Author(s) -
Kajiyama K,
OkadaHatakeyama M,
Hayashizaki Y,
Kawaji H,
Suzuki H
Publication year - 2013
Publication title -
cpt: pharmacometrics and systems pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.53
H-Index - 37
ISSN - 2163-8306
DOI - 10.1038/psp.2013.53
Subject(s) - biology , computational biology , mapk/erk pathway , signal transduction , gene expression profiling , microarray , kinase , promoter , gene expression , gene , microbiology and biotechnology , genetics
Quantitative analysis of cellular responses to drugs is of major interest in pharmaceutical research. Microarray technologies have been widely used for monitoring genome‐wide expression changes. However, this approach has several limitations in terms of coverage of targeted RNAs, sensitivity, and quantitativeness, which are crucial for accurate monitoring of cellular responses. In this article, we report an application of genome‐wide and quantitative profiling of cellular responses to drugs. We monitored promoter activities in MCF‐7 cells by Cap Analysis of Gene Expression using a single‐molecule sequencer. We identified a distinct set of promoters affected even by subtle inhibition of the Ras‐ERK and phosphatidylinositol‐3‐kinase‐Akt signal‐transduction pathways. Furthermore, we succeeded in explaining the majority of promoter responses to inhibition of the upstream epidermal growth factor receptor kinase quantitatively based on the promoter profiles upon inhibition of the two individual downstream signaling pathways. Our results demonstrate unexplored utility of highly quantitative promoter activity profiling in drug research. CPT: Pharmacometrics & Systems Pharmacology (2013) 2, e77; doi: 10.1038/psp.2013.53 ; published online 25 September 2013