PMID- 29298343 OWN - NLM STAT- MEDLINE DCOM- 20180215 LR - 20181113 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 13 IP - 1 DP - 2018 TI - EpCAM peptide-primed dendritic cell vaccination confers significant anti-tumor immunity in hepatocellular carcinoma cells. PG - e0190638 LID - 10.1371/journal.pone.0190638 [doi] LID - e0190638 AB - Cancer stem-like cells (CSCs) may play a key role in tumor initiation, self-renewal, differentiation, and resistance to current treatments. Dendritic cells (DCs) play a vital role in host immune reactions as well as antigen presentation. In this study, we explored the suitability of using CSC peptides as antigen sources for DC vaccination against human breast cancer and hepatocellular carcinoma (HCC) with the aim of achieving CSC targeting and enhancing anti-tumor immunity. CD44 is used as a CSC marker for breast cancer and EpCAM is used as a CSC marker for HCC. We selected CD44 and EpCAM peptides that bind to HLA-A2 molecules on the basis of their binding affinity, as determined by a peptide-T2 binding assay. Our data showed that CSCs express high levels of tumor-associated antigens (TAAs) as well as major histocompatibility complex (MHC) molecules. Pulsing DCs with CD44 and EpCAM peptides resulted in the efficient generation of mature DCs (mDCs), thus enhancing T cell stimulation and generating potent cytotoxic T lymphocytes (CTLs). The activation of CSC peptide-specific immune responses by the DC vaccine in combination with standard chemotherapy may provide better clinical outcomes in advanced carcinomas. FAU - Choi, Yoo Jin AU - Choi YJ AD - Research Center, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. FAU - Park, Seong-Joon AU - Park SJ AD - Research Center, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. FAU - Park, You-Soo AU - Park YS AD - Research Center, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. FAU - Park, Hee Sung AU - Park HS AD - Research Center, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. FAU - Yang, Kwang Mo AU - Yang KM AD - Research Center, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. AD - Department of Radiation Oncology, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. AD - Department of Radiation Oncology, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea. FAU - Heo, Kyu AU - Heo K AUID- ORCID: 0000-0001-8833-4731 AD - Research Center, Dongnam Institute of Radiological & Medical Sciences, Busan, Republic of Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180103 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Cancer Vaccines) RN - 0 (EPCAM protein, human) RN - 0 (Epithelial Cell Adhesion Molecule) RN - 0 (HLA-A2 Antigen) RN - 0 (Hyaluronan Receptors) RN - 0 (Peptide Fragments) SB - IM MH - Animals MH - Cancer Vaccines/immunology/*therapeutic use MH - Carcinoma, Hepatocellular/immunology/*therapy MH - Cell Line, Tumor MH - Dendritic Cells/*immunology MH - Enzyme-Linked Immunosorbent Assay MH - Epithelial Cell Adhesion Molecule/*administration & dosage/chemistry MH - Female MH - HLA-A2 Antigen/immunology MH - Heterografts MH - Humans MH - Hyaluronan Receptors/immunology MH - Liver Neoplasms/immunology/*therapy MH - Mice MH - Mice, Inbred BALB C MH - Peptide Fragments/*administration & dosage PMC - PMC5752035 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2018/01/04 06:00 MHDA- 2018/02/16 06:00 PMCR- 2018/01/03 CRDT- 2018/01/04 06:00 PHST- 2017/05/25 00:00 [received] PHST- 2017/12/18 00:00 [accepted] PHST- 2018/01/04 06:00 [entrez] PHST- 2018/01/04 06:00 [pubmed] PHST- 2018/02/16 06:00 [medline] PHST- 2018/01/03 00:00 [pmc-release] AID - PONE-D-17-20159 [pii] AID - 10.1371/journal.pone.0190638 [doi] PST - epublish SO - PLoS One. 2018 Jan 3;13(1):e0190638. doi: 10.1371/journal.pone.0190638. eCollection 2018.