Published online Feb 6, 2016. doi: 10.4292/wjgpt.v7.i1.112
Peer-review started: June 1, 2015
First decision: October 14, 2015
Revised: October 20, 2015
Accepted: December 3, 2015
Article in press: December 4, 2015
Published online: February 6, 2016
Processing time: 245 Days and 15 Hours
Core tip: Epidemiological data, clinical observations and family/ immigrants studies indicate the significance of environmental influence in the development of inflammatory bowel diseases (IBD). A westernized high fat diet, full of refined carbohydrates is strongly associated with the development of IBD, contrary to a high in fruit, vegetables and polyunsaturated fatty acid-3 diet that is protective against these diseases. Additional factors such as air pollution, psychological factors, sleep disturbances and exercise influence the development and the course of IBD. Epigenetic mechanism like DNA methylation, histone modification and altered expression of miRNAS could explain the connection between genes and environmental factors in triggering the development of IBD.
