國家衛生研究院 NHRI:Item 3990099045/6292

NHRI > National Institute of Infectious Diseases and Vaccinology > Hsin-Wei Chen > Periodical Articles > Item 3990099045/6292

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/6292

Title:	A novel HLA-A2-restricted CTL epitope of tumor-associated antigen L6 can inhibit tumor growth in vivo
Authors:	Tu, SH;Huang, HI;Lin, SI;Liu, HY;Sher, YP;Chiang, SK;Chong, P;Roffler, S;Tseng, GC;Chen, HW;Liu, SJ
Contributors:	Division of Vaccine Research and Development
Abstract:	Vaccines utilizing cytotoxic T lymphocyte (CTL) epitopes are promising for the treatment of cancer and chronic infectious diseases. Tumor-associated antigen L6 (TAL6) is overexpressed in some epithelial cancer cells. In this report, we detected TAL6 expression in breast cancer tissue using quantitative reverse-transcriptase-polymerase chain reaction. We found that >80% of breast tumor tissue highly expressed TAL6 compared with adjacent normal breast tissue. To identify CTL epitopes from TAL6, we synthesized 18 peptides for HLA-A2-binding assay based on the MHC-binding motif using 4 computer prediction programs. Positive binders identified by ELISA were immunized in HLA-A2 transgenic (A2 Tg) mice. Two peptides, peptide 2 and peptide 5, induced T-cell responses in A2 Tg mice. To confirm whether these peptides could be processed and presented to induce T-cell responses in vivo, A2 Tg mice were immunized with plasmid DNA encoding TAL6. We found that both peptides 2 and 5 stimulated splenocytes from TAL6-immunized mice to secrete interferon-gamma. However, only peptide 5 could induce expression of the cytolytic molecule CD107a on CD8 T cells after immunization. Furthermore, peptide 5-immunized A2 Tg mice could inhibit the growth of TAL6-positive tumors (EL4/TAL6/HLA-A2) in A2 Tg mice but not in wild-type mice. These results demonstrate that the TAL6-derived CTL epitope could induce HLA-A2-restricted immunity against TAL6-expressing tumor cells.
Date:	2012-04
Relation:	Journal of Immunotherapy. 2012 Apr;35(3):235-244.
Link to:	http://dx.doi.org/10.1097/CJI.0b013e318248f2ae
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1524-9557&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000301656800004
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84863377785
Appears in Collections:	[Hsin-Wei Chen] Periodical Articles [Shih-Jen Liu] Periodical Articles [Pele Choi-Sing Chong] Periodical Articles

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