Abstract:
:Myc is an oncogenic transcription factor that promotes tumorigenesis. Recently, a dominant negative form of Myc (Omomyc) was shown to cause regression of lung tumors in a mouse model of lung cancer caused by KRAS mutation, suggesting that Myc might be a potential therapeutic target to treat the KRAS lung cancer. However, it is not yet known whether Omomyc can also inhibit the growth of human lung tumors that carry a similar KRAS mutation. In the present study, we demonstrate that Omomyc induces cell death of KRAS-mutated human lung adenocarcinoma A549 cells in vitro and in vivo. However, Omomyc does not induce cell death in human lung adenocarcinoma H441 cells that also carry the KRAS mutation. Interestingly, A549 cells express high levels of Myc, while H441 cells do not. Co-expression of exogenous Myc with Omomyc in H441 cells induces cell death, indicating that Omomyc requires high levels of Myc to induce cell death in KRAS mutation-positive lung adenocarcinoma. Here, we show for the first time that KRAS mutation-positive lung cancer displaying high levels of Myc could be treated by inhibiting Myc transactivation function.
journal_name
Anticancer Resjournal_title
Anticancer researchauthors
Fukazawa T,Maeda Y,Matsuoka J,Yamatsuji T,Shigemitsu K,Morita I,Faiola F,Durbin ML,Soucek L,Naomoto Ysubject
Has Abstractpub_date
2010-10-01 00:00:00pages
4193-200issue
10eissn
0250-7005issn
1791-7530pii
30/10/4193journal_volume
30pub_type
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