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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2005.1
- 수록면
- 158 - 164 (7page)
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Purpose: The serine/threonine kinase Akt was described to inhibit apoptosis in cancer. This study was to examine the effect of Gleevec on head and neck squamous cell carcinoma(HNSCC) through the mechanism of Akt. Experimental Design: Gleevec was introduced into the HNSCC cell lines UMSCC10B, HN12 and HN30 in a range of concentrations. Cell viability was assessed by clonogenic survival analysis. Targets of Gleevec(PDGFR, c-Kit, and c-Abl) were evaluated by Western blot. HNSCC tissue samples were stained for PDGFR, c-Kit and phosphorylated Akt. Akt phosphorylation following Gleevec treatment was assessed using Western blot. Akt siRNA was used to as the positive control. Results: Colony forming efficiency decreased with an increase in concentration of Gleevec. Expressions of PDGFR, c-Kit, and c-Abl were observed in HNSCC cells. Immunohistochemistry confirmed high expression of PDGFR, c-Kit, and p-Akt in human HNSCC tissues. Akt kinase activity was significantly inhibited with increasing concentration of Gleevec in HNSCC cells, and near complete dephosphorylation of Akt was observed at $6{\mu}M$ of Gleevec in the UMSCC10B and HN30 cell lines. Conclusions: Gleevec at clinically comparable concentrations caused a dose dependant decrease in HNSCC survival. The decreased cell survival was related to the inhibition of Akt kinase activity and dephosphorylation of Akt. Akt signaling pathway may be a relevant target for Gleevec in treating HNSCC.
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