發明
中華民國
100131790
I 523867
抗C-MET抗體及其使用方法
中央研究院
2016/03/01
臨床研究發現數種癌症包括肺癌,其惡化、轉移和抗藥性,與肝臟生長因子受體(c-Met)異常表現有關。所以,c-Met可能可以作為癌症標靶治療的抗體標的。本篇研究,我們利用噬菌體顯現法鑑定出數個專一性結合至c-Met的人類單鏈抗體(scFv),並發現其中一株scFv可有效抑制肝臟生長因子(HGF)結合至c-Met,且會抑制HGF所誘導的c-Met磷酸化。我們將anti-c-Met scFv結合至微脂體的表面,可促進其攜帶的小分子化療藥物doxorubicin進入癌細胞內,進一步引發細胞凋亡的機制而毒殺癌細胞。此外,以帶有人類肺癌的免疫不全老鼠進行的活體腫瘤標的實驗,與anti-c-Met scFv結合的量子點(quantum dot)造影分析,證明此scFv具有標的和造影臨床應用之潛力。進一步,結合anti-c-Met scFv所製作成的標靶微脂體化療藥物,施打於帶有人類肺癌的老鼠,發現其抑制腫瘤生長,增進癌症治療療效的能力,明顯優於非標靶的微脂體化療藥物。總結而言,此研究顯示anti-c-Met scFv在未來可以應用於臨床上,幫助癌症藥物輸送與造影。 Aberrantly expressed c-Met, the receptor for hepatocyte growth factor, has been implicated in human lung cancer as well as malignancy, metastasis and drug-resistance in other human cancers. We utilized phage display to identify human scFv antibodies that specifically bind to c-Met protein. The anti-c-Met scFvs selectively bound to and internalized in several lung cancer cell lines expressing c-Met. One anti-c-Met scFv strongly inhibited HGF binding to c-Met and inhibited HGF-induced c-Met phosphorylation. Conjugation of anti-c-Met scFv with liposomes enabled the efficient delivery of doxorubicin into the cancer cells where it subsequently exerted cytotoxic activity by inducing apoptosis pathway. We further found anti-c-Met scFv-phage preferentially homed to tumors in the mice bearing human lung cancer xenografts. In vivo tumor homing assay and scFv-conjugated quantum dots clearly demonstrated the potential clinical use of this scFv in tumor targeting and imaging.
本會(收文號1110051198)同意該院111年8月8日智財字第1111701873號函申請終止維護專利(中央研究院)
智財技轉處
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