Targeting metastatic breast cancer with peptide epitopes derived from autocatalytic loop of Prss14/ST14 membrane serine protease and with monoclonal antibodies

被引:9
作者
Kim, Ki Yeon [1 ]
Yoon, Minsang [1 ]
Cho, Youngkyung [2 ]
Lee, Kwang-Hoon [3 ]
Park, Sora [3 ]
Lee, Se-ra [3 ]
Choi, So-Young [3 ]
Lee, Deokjae [1 ,4 ]
Yang, Chansik [1 ,2 ]
Cho, Eun Hye [1 ]
Jeon, Sangjun Davie [1 ]
Kim, Seok-Hyung [5 ]
Kim, Chungho [6 ]
Kim, Moon Gyo [1 ,7 ]
机构
[1] Inha Univ, Dept Biol Sci, Inharo 100, Incheon, South Korea
[2] Seoul Natl Univ, Div Life Sci, Seoul, South Korea
[3] Osong Med Innovat Fdn, New Drug Dev Ctr, Cheongju, South Korea
[4] MedyTox, 114 Cent Town Ro, Suwon, South Korea
[5] Sungkyunkwan Univ, Dept Pathol, Coll Med, Samsung Med Ctr, Seoul, South Korea
[6] Korea Univ, Dept Life Sci, Seoul, South Korea
[7] Inha Univ, Convergent Res Inst Metab & Immunoregulat, Incheon, South Korea
基金
新加坡国家研究基金会;
关键词
Prss14; Metastasis; Immunotherapy; Cancer vaccine; Autocatalytic loop; ACTIVATED RECEPTOR-2; POOR-PROGNOSIS; MATRIPTASE; CELLS; PATHWAY; GROWTH; SUPPRESSION; PREVENTION; INHIBITION; PROSTASIN;
D O I
10.1186/s13046-019-1373-y
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background In order to develop a new immunotherapeutic agent targeting metastatic breast cancers, we chose to utilize autocatalytic feature of the membrane serine protease Prss14/ST14, a specific prognosis marker for ER negative breast cancer as a target molecule. Methods The study was conducted using three mouse breast cancer models, 4 T1 and E0771 mouse breast cancer cells into their syngeneic hosts, and an MMTV-PyMT transgenic mouse strain was used. Prss14/ST14 knockdown cells were used to test function in tumor growth and metastasis, peptides derived from the autocatalytic loop for activation were tested as preventive metastasis vaccine, and monoclonal and humanized antibodies to the same epitope were tested as new therapeutic candidates. ELISA, immunoprecipitation, Immunofluorescent staining, and flow cytometry were used to examine antigen binding. The functions of antibodies were tested in vitro for cell migration and in vivo for tumor growth and metastasis. Results Prss14/ST14 is critically involved in the metastasis of breast cancer and poor survival rather than primary tumor growth in two mouse models. The epitopes derived from the specific autocatalytic loop region of Prss14/ST14, based on structural modeling acted as efficient preventive metastasis vaccines in mice. A new specific monoclonal antibody mAb3F3 generated against the engineered loop structure could reduce cell migration, eliminate metastasis in PyMT mice, and can detect the Prss14/ST14 protein expressed in various human cancer cells. Humanized antibody huAb3F3 maintained the specificity and reduced the migration of human breast cancer cells in vitro. Conclusion Our study demonstrates that Prss14/ST14 is an important target for modulating metastasis. Our newly developed hybridoma mAbs and humanized antibody can be further developed as new promising candidates for the use in diagnosis and in immunotherapy of human metastatic breast cancer.
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页数:17
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