肿瘤防治研究2017，Vol.44Issue(9)：596-600,5.DOI:10.3971/j.issn.1000-8578.2017.17.0396
一种与前列腺癌高转移细胞表面受体特异性结合的多肽片段的筛选及验证
Selection and Validation of Polypeptide Fragment Specially Locating on Surface of Highly Metastatic Prostate Cancer Cells
摘要
Abstract
Objective To select polypeptide fragment which binds to the highly metastatic prostate cancer PC-3M-1E8 cell line in vitro screened by FliTrx bacterial peptide display system.Methods Targeting peptides were selected in vitro by screening of the FliTrx library with the paired highly metastatic and nonmetastatic human prostate cancer cell lines PC-3M-1E8 and PC-3M-2B4.After bio-selection,the clones with the strongest binding capability were identified,the inserted and repeated motifs were selected and synthesized for further identification.The specific binding capacity of peptides was confirmed by binding assay,competitive inhibition assays and in vivo targeting studies.Results The target peptide sequences enriched in the selected clone pool was NVVRQ,which we named TMTP1.Binding assay revealed that FITC-TMTP1 specially bounds to highly metastatic prostate cancer cell PC-3M-1E8,but did not bind to the non-metastatic tumor PC-3M-2B4;binding of FITC-TMTP1 and PC-3M-1E8 was concentration-dependent and could be competitively inhibited by free synthetic TMTP1.After i.v.injection,FITC-TMTP1 also specifically targeted primary and metastatic tumors induced by PC-3M-1E8.Conclusion TMTP1 targets highly metastatic prostate cancer cells in vitro and in vivo.It suggests that TMTP1 is a potential strategy for the development of new diagnostic tracers or alternative anticancer carrier for prostate cancer.关键词
肽库/前列腺癌/多肽/转移Key words
Peptide library/Prostate cancer/Peptides/Metastasis分类
医药卫生引用本文复制引用
罗丹枫,刘荣华,马湘一,奚玲,马丁..一种与前列腺癌高转移细胞表面受体特异性结合的多肽片段的筛选及验证[J].肿瘤防治研究,2017,44(9):596-600,5.基金项目
国家自然科学基金(81202061,81572563) （81202061,81572563）
