Details

Autor(en) / Beteiligte

• OYA, Mototsugu
• OHTSUBO, Masafumi
• TAKAYANAGI, Atsushi
• TACHIBANA, Masaaki
• SHIMIZU, Nobuyoshi
• MURAI, Masaru

Titel

Constitutive activation of nuclear factor-κB prevents TRAIL-induced apoptosis in renal cancer cells

Ist Teil von

• Oncogene, 2001-06, Vol.20 (29), p.3888-3896

Ort / Verlag

Basingstoke: Nature Publishing

Erscheinungsjahr

2001

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• TRAIL has gained much attention for its specific induction of apoptosis in cancer cells but not in normal cells. This phenomenon has been explained thus: that cancer cells dominantly express death receptors while normal cells express decoy receptors. However, recent reports have shown that some cancer cell lines are resistant to TRAIL-induced apoptosis despite the absence of decoy receptors and the presence of death receptors. This suggested the existance of an inhibitory factor. We herein showed that NF-κB is a key molecule underlying the TRAIL-resistant mechanism in renal cell carcinoma (RCC) cell lines. We observed that NF-κB is constitutively activated in resistant cell lines. Forced expression of antisense cDNA of IκBα, a specific inhibitor of NF-κB, in TRAIL-sensitive cell lines with a low NF-κB activity result in constitutive activation of NF-κB and resistance to TRAIL-induced apoptosis. Adenoviral expression of a stable form of IκBα in the TRAIL-resistant cell lines induced apoptosis. These data suggest that RCC can be classified into two subsets: TRAIL-sensitive RCC with a low NF-κB activity and TRAIL-resistant RCC with constitutively activated NF-κB. In the former group TRAIL can be a treatment option, while in the latter group a molecular approach targeting NF-κB appears to be a promising therapy.