Open AccessThe FGF ‐1‐specific single‐chain antibody scFv1C9 effectively inhibits breast cancer tumour growth and metastasis
Author(s) -
Shi Hengliang,
Fu Chunling,
Wang Wei,
Li Yu,
Du Shuang,
Cao Rangjuan,
Chen Jingying,
Sun Dong,
Zhang Zhongyu,
Wang Xingzhi,
Zhu Xiaojuan
Publication year - 2014
Publication title -
journal of cellular and molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.44
H-Index - 130
eISSN - 1582-4934
pISSN - 1582-1838
DOI - 10.1111/jcmm.12371
Subject(s) - cancer research , metastasis , angiogenesis , cancer , biology , intracrine , antibody , fibroblast growth factor , immunotherapy , breast cancer , cell growth , immunology , cell culture , receptor , autocrine signalling , biochemistry , genetics
Immunotherapy mediated by recombinant antibodies is an effective therapeutic strategy for a variety of cancers. In a previous study, we demonstrated that the fibroblast growth factor 1 ( FGF ‐1)‐specific recombinant antibody scFv1C9 arrests the cell cycle at the G0/G1 transition by blocking the intracrine FGF ‐1 pathway in breast cancer cells. Here, we further show that the overexpression of scFv1C9 in MCF ‐7 and MDA ‐ MB ‐231 breast cancer cells by lentiviral infection resulted in decreased tumourigenicity, tumour growth and lung metastasis through FGF ‐1 neutralization. We found that scFv1C9 resulted in the up‐regulation of p21, which in turn inhibited the expression of CDK 2 and blocked cell cycle progression. To explore the potential role of scFv1C9 in vivo , we delivered the gene into solid tumours by electroporation, which resulted in significant inhibition of tumour growth. In tumour tissue sections, immunohistochemical staining of the cellular proliferation marker Ki‐67 and the microvessel marker CD 31 showed a reduction in the proliferative index and microvessel density, respectively, upon expression of scFv1C9 compared with the appropriate controls. Thus, our data indicate a central role for scFv1C9 in blocking the intracrine pathway of FGF ‐1, therefore, scFv1C9 could be developed in an effective therapeutic for breast cancer.