Anti-IGF-1R monoclonal antibody inhibits the carcinogenicity activity of acquired trastuzumab-resistant SKOV3

Journal of Ovarian Research - Tập 7 Số 1 - Trang 1-12 - 2014
Wang, Wei1,2, Zhang, Yan3, Lv, Ming2, Feng, Jiannan1,2, Peng, Hui4, Geng, Jing2, Lin, Zhou2, Zhou, Tingting2, Li, Xinying2, Shen, Beifen2, Ma, Yuanfang1, Qiao, Chunxia2
1Laboratory of Cellular and Molecular Immunology, Institute of Immunology, Henan University, Kaifeng, China
2Laboratory of Immunology, Institute of Basic Medical Sciences, Beijing, China
3Department of Gynecology and Obstetrics, PLA General Hospital, Beijing, China
4Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Beijing, China

Tóm tắt

Antibody resistance, not only de novo but also acquired cases, usually exists and is related with lower survival rate and high risk of recurrence. Reversing the resistance often results in better clinical therapeutic effect. Previously, we established a trastuzumab-resistant ovarian cancer cell line, named as SKOV3-T, with lower HER2 and induced higher IGF-1R expression level to keep cell survival. IGF-1R was identified important for SKOV3-T growth. Then, a novel anti-IGF-1R monoclonal antibody, named as LMAb1, was used to inhibit SKOV3-T in cell growth/proliferation, migration, clone formation and in vivo carcinogenicity. In both in vitro and in vivo assays, LMAb1 showed effective anti-tumor function, especially when being used in combination with trastuzumab, which was beneficial to longer survival time of mice as well as smaller tumor. It was also confirmed preliminarily that the mechanism of antibody might be to inhibit the activation of IGF-1R and downstream MAPK, AKT pathway transduction. We achieved satisfactory anti-tumor activity using trastuzumab plus LMAb1 in trastuzumab-resistant ovarian cancer model. In similar cases, not only acquired but also de novo, good curative effect might be achieved using combined antibody therapy strategies.

Tài liệu tham khảo

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