1932

Abstract

The reprogramming of the epigenome through silencing of genes and microRNAs by cytosine DNA methylation and chromatin remodeling is critical for the initiation and progression of lung cancer through affecting all major cell regulatory pathways. Importantly, the fact that epigenetic reprogramming is reversible by pharmacological agents has opened new avenues for clinical intervention. This review focuses on the tremendous progress made in elucidating genes and microRNAs that are epigenetically silenced in lung cancer and highlights how loss of function impacts cell phenotype and major signaling pathways. The article describes the utility of () an in vitro model using hTERT/Cdk4 immortalized human bronchial epithelial cell lines to identify genes and microRNAs silenced during premalignancy and () an in vivo orthotopic nude rat lung cancer model to evaluate response to epigenetic therapy. New insights regarding the advantage of aerosol delivery of demethylating agents and the concept of priming tumors for subsequent therapy are presented and discussed.

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2015-02-10
2024-06-19
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