PHARMACEUTICAL COMPOSITION FOR PREVENTION AND TREATMENT FOR HEPATITIS C CONTAINING ABI1 EXPRESSION OR ACTIVITY INHIBITOR

The present invention relates to a pharmaceutical composition for preventing and treating hepatitis C and, more specifically, to a composition containing an inhibitor suppressing the expression or activation of Abelson interactor 1 (Abi1). As a result of identifying cell proteins interacting with a...

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Bibliographische Detailangaben
Hauptverfasser: HWANG, SOON BONG, LIM, YUN SOOK
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to a pharmaceutical composition for preventing and treating hepatitis C and, more specifically, to a composition containing an inhibitor suppressing the expression or activation of Abelson interactor 1 (Abi1). As a result of identifying cell proteins interacting with a HCV NS5A protein by using a protein microarray technique by inventors in the present invention, about 90 cell proteins were identified to interact with the HCV NS5A protein. Abi1 was selected from the partners of the NS5A. The binding between the HCV NS5A and Abi1 was confirmed by using an in vitro pull-down assay and a common precipitation analysis. Abi1 is essential for replication of HCV. In addition, EGF-induced Erk and Efr1 activation was inhibited by the NS5A, and the inhibitory effect was mediated by the Abi1 protein. Knockdown of the Abi1 expression impaired the replication of HCV, while overexpression of the Abi1 increased proliferation of HCV. In summary, these results support that HCV forces the Abi1 in host cells to modulate a MEK/ERK signaling pathway for proliferation. Therefore, a substance inhibiting the activation or expression of the Abi1 is useful as a prophylactic agent or a therapeutic agent for hepatitis C by inhibiting the proliferation of HCV. 본 발명은 C형 간염 예방 및 치료용 약제학적 조성물에 관한 것으로서, 좀더 자세히는 Abi1 (Abelson interactor 1) 발현 또는 활성 억제제를 포함하는 조성물에 관한 것이다. 본 발명에서 발명자들이 단백질 마이크로어레이 기술을 이용하여 HCV NS5A 단백질과 상호작용하는 세포 단백질을 확인한 결과, 약 90 개의 HCV NS5A와 상호작용하는 세포 단백질을 밝혔다. 이 NS5A 파트너들 중 Abi1을 선택하였다. HCV NS5A와 Abi1의 결합은 인 비트로 풀다운 및 공통침전 분석을 이용하여 입증하였다. Abi1은 HCV 복제에 필수적이다. 뿐만 아니라, EGF로 자극된 Erk 및 Egr1 활성화는 NS5A에 의해 저해되었으며, 이 저해효과는 Abi1 단백질에 의해 매개되었다. Abi1 발현 녹다운은 HCV 복제를 손상시켰으나, 반면 Abi1 과발현은 HCV 증식을 증가시켰다. 종합하면, 이러한 결과들은 HCV가 숙주세포 내 Abi1을 강제하여 MEK/ERK 신호전달 경로를 자신의 증식을 위하여 변조하였음을 뒷받침해준다. 따라서, Abi1 활성 또는 발현을 저해하는 물질은 HCV의 증식을 저해함으로써 C형 간염 예방 및 치료제로서 유용하다.