Model-based Comparative Prediction of Transcription-Factor Binding Motifs in Anabolic Responses in Bone
- Author:
Chen B. ANDY
1
;
Hamamura KAZUNORI
;
Wang GUOHUA
;
Xing WEIRONG
;
Mohan SUBBURAMAN
;
Yokota HIROKI
;
Liu YUNLONG
Author Information
1. Departments of Biomedical Engineering/Anatomy and Cell Biology, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
- Keywords:
microarray;
transcription-factor binding motif;
mechanical loading;
bone mor-phogenic protein;
ant algorithm
- From:
Genomics, Proteomics & Bioinformatics
2007;2(3):158-165
- CountryChina
- Language:Chinese
-
Abstract:
Understanding the regulatory mechanism that controls the alteration of global gene expression patterns continues to be a challenging task in computational biology. We previously developed an ant algorithm, a biologically-inspired computational technique for microarray data, and predicted putative transcription-factor binding motifs (TFBMs) through mimicking interactive behaviors of natural ants. Here we extended the algorithm into a set of web-based software, Ant Modeler, and applied it to investigate the transcriptional mechanism underlying bone formation. Mechanical loading and administration of bone morphogenic proteins (BMPs) are two known treatments to strengthen bone. We addressed a question: Is there any TFBM that stimulates both "anabolic responses of mechanical loading" and "BMP-mediated osteogenic signaling"? Although there is no significant overlap among genes in the two responses, a comparative model-based analysis suggests that the two independent osteogenic processes employ common TFBMs, such as a stress responsive element and a motif for peroxisome proliferator-activated recep- tor (PPAR). The post-modeling in vitro analysis using mouse osteoblast cells sup- ported involvements of the predicted TFBMs such as PPAR, Ikaros 3, and LMO2 in response to mechanical loading. Taken together, the results would be useful to derive a set of testable hypotheses and examine the role of specific regulators in complex transcriptional control of bone formation.
