Korea Research Institute of Bioscience and Biotechnology

Soo Young Jun

In-Sung Song

Jin-Man Kim

Jeong-Min Kim

Joo Heon Kim

Nam-Soon Kim

Cheol-Hee Kim

Hyun-Taek Kim

So-Young Jeong

Ga Hee Ha

The present invention relates to a pharmaceutical composition, including inhibitors for expression or activity of TIP41 protein, for prevention and treatment of cancer. When the liver cancer cell lines, showing resistance to TRAIL, are treated with TIP41 siRNA and TRAIL, apoptosis is induced in cancer cell. The same effect is found in cases of lung cancer and colon cancer with resistance against TRAIL. Moreover, this induction of apoptosis by TIP41 siRNA and TRAIL was confirmed in tumor xenograft, which was injected with Huh7 liver cancer cells and then was subjected to TIP41 siRNA transfection and TRAIL treatment. In addition, it was confirmed through animal experiments in which the tumor size has reduced and apoptosis was induced by treatment with TIP41 siRNA and TRAIL. Of note, MKK7/JNK pathway was confirmed to mediate the apoptosis induced by the application of TIP41 siRNA and TRAIL. The apoptosis were verified to be caused by the activation of MKK7/JNK signaling pathway. Taken together, the present invention provide the strong evidence that the pharmaceutical composition, including inhibitors for TIP41 expression or activity can be used for cancer prevention and treatment as well as an anti-cancer adjuvant. Taken together, the pharmaceutical composition comprising inhibitors for expression or activity of TIP41 protein may be used for prevention and treatment of cancer or as an anti-cancer adjuvant.

Composition for enhancing TRAIL sensitivity comprising inhibitors for expression or activity of TIP41 as a target gene of TRAIL sensitizer

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Daegu, South Korea

Soo Young Jun