Etoposide-induced 2.4 kb transcript (EI24, also known as PIG8) is a p53 target gene involved in cell growth suppression and apoptosis and known to be frequently altered in human cancers. Although EI24 expression is decreased in various cancers and is associated with colorectal cancer progression and metastasis, the physiological function of EI24 in colorectal cancer is yet unclear. We generated an Ei24 conditional transgenic (Tg) mouse to study the therapeutic effects of Ei24 in vivo and evaluated whether Ei24 plays a role of a tumor suppressor using Ei24 Tg mouse crossed with ApcMin/+ mouse, which develops multiple intestinal adenomas. The overexpression of Ei24 failed to cause any notable difference in the number of polyps, lengths of the intestine and spleen, and survival rate between ApcMin/+ and ApcMin/+ Ei24 Tg mice. Ei24 plays no significant role in colon cancer caused by the substitutional mutation of Apc in mice. Therefore, our result dismisses the hypothesized direct link between ApcMin/+ mutation and Ei24 expression in colorectal cancer model.
|Number of pages||6|
|Journal||Biochemical and Biophysical Research Communications|
|Publication status||Published - 2019 Jul 5|
Bibliographical noteFunding Information:
This work was supported by grants from the National Research Foundation of Korea (NRF; 2017R1A4A1015328 and 2018R1A2A1A05022746 ). Both grants were supported in managing the mouse and gave funds for studying Ei24. The National Research Foundation of Korea was not involved in study design, data collection, data analysis, or interpretation of study results.
All Science Journal Classification (ASJC) codes
- Molecular Biology
- Cell Biology