Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.
KMID : 0578320130360020177
Molecules and Cells
2013 Volume.36 No. 2 p.177 ~ p.184
TrkC Promotes Survival and Growth of Leukemia Cells Through Akt-mTOR-Dependent Up-Regulation of PLK-1 and Twist-1
Kim Min-Soo

Kim Gyoung-Mi
Choi Yun-Jeong
Kim Hye-Joung
Kim Yoo-Jin
Jin Wook
Abstract
It has been suggested that activation of receptor PTKs is important for leukemogenesis and leukemia cell response to targeted therapy in hematological malignancies including leukemia. PTKs induce activation of the PI3K/Akt/mTOR pathway, which can result in prevention of apoptosis. Here, we describe an important role of the TrkC-associated molecular network in the process of leukemogenesis. TrkC was found to be frequently overexpressed in human leukemia cells and leukemia subtypes. In U937 human leukemia cells, blockade of TrkC using small hairpin RNA (shRNA) specific to TrkC or K562a, a specific inhibitor of TrkC, resulted in a significant decrease in growth and survival of the cells, which was closely associated with reduced mTOR level and Akt activity. In addition, TrkC enhances the survival and proliferation of leukemia, which is correlated with activation of the PI3K/Akt pathway. Moreover, TrkC significantly inhibits apoptosis via induction of the expression of PLK-1 and Twist-1 through activation of AKT/mTor pathway; therefore, it plays a key role in leukemogenesis. These findings reveal an unexpected physiological role for TrkC in the pathogenesis of leukemia and have important implications for understanding various hematological malignancies.
KEYWORD
apoptosis, hematological malignancies, PI3K/Akt/Mtor, survival and growth, TrkC
FullTexts / Linksout information
Listed journal information
SCI(E) MEDLINE ÇмúÁøÈïÀç´Ü(KCI)