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BioMed Research International
Volume 2017 (2017), Article ID 4825108, 8 pages
Research Article

Isolation of Fibroblast-Activation Protein-Specific Cancer-Associated Fibroblasts

1National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi, China
2Shenzhen Key Laboratory of Translational Medicine of Tumor, Department of Basic Medicine, School of Medicine, Shenzhen, Guangdong 518000, China

Correspondence should be addressed to Yongxiang Zhao

Received 9 March 2017; Revised 9 May 2017; Accepted 15 May 2017; Published 14 August 2017

Academic Editor: Takashi Saku

Copyright © 2017 Yingying Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The current study is to develop a gentle and efficient method for purification of fibroblast-activation protein positive (FAP+) cancer-associated fibroblasts (CAFs) from tumor tissues. Fresh tissues were isolated from BALB/c-Nude mice bearing human liver cancer cell line (HepG2), fully minced and separated into three parts, and digested with trypsin digestion and then treated with collagenase type IV once, twice, or thrice, respectively. Finally, the cells were purified by using FAP magnetic beads. The isolated CAFs were grown in culture medium and detected for the surface expression of fibroblast-activation protein (FAP). The number of adherent cells which were obtained by digestion process with twice collagenase type IV digestion was () × 104, much more than that with the only once collagenase type IV digestion () × 104 () and similar to thrice collagenase type IV digestion. The percentage of FAP+ CAFs with twice collagenase type IV digestion (38.5%) was higher than that with the only once collagenase type IV digestion (20.0%) and little higher than thrice collagenase type IV digestion (37.5%). The FAP expression of CAFs was quite different from normal fibroblasts (NFs). The fibroblasts isolated by the innovation are with high purity and being in wonderful condition and display the features of CAFs.