Abstract:
:A mouse HER2-derived peptide, HER2p63 (A) (TYLPANASL), can induce K(d)-restricted mouse cytotoxic T lymphocytes (CTL) and also function as a tumor rejection antigen in an in vivo assay. Since the anchor motif of mouse K(d) for peptide binding has much similarity to that of human HLA-A2402, we asked if human HER2p63 (T) (TYLPTNASL) could induce HER2-specific CTL in HLA-A2402-positive individuals. Peripheral blood mononuclear cells (PBMC) of HLA-A2402-positive individuals were sensitized in vitro with HER2p63-pulsed autologous dendritic cells prepared from PBMC. CTL clone derived from these specifically lysed HER2-expressing cell lines bearing HLA-A2402. Cytotoxic activity of the CTL clone against the HER2-expressing cell line bearing HLA-A2402 was blocked by antibodies against CD3, CD8, HLA-A24 or MHC class I, and was also inhibited by the addition of excess HER2p63-pulsed C1R bearing HLA-A2402. Killer cells were generated from PBMC of seven healthy individuals and five ovarian cancer patients, all of HLA-A2402 type, by in vitro sensitization with HER2p63-pulsed autologous antigen presenting cells. These killer cells selectively lysed HER2-expressing SKOV3 transfected with HLA-A2402 cDNA, indicating high immunogenicity of HER2p63 in all 12 individuals examined.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Okugawa T,Ikuta Y,Takahashi Y,Obata H,Tanida K,Watanabe M,Imai S,Furugen R,Nagata Y,Toyoda N,Shiku Hdoi
10.1002/1521-4141(200011)30:11<3338::AID-IMMU3338>keywords:
subject
Has Abstractpub_date
2000-11-01 00:00:00pages
3338-46issue
11eissn
0014-2980issn
1521-4141pii
10.1002/1521-4141(200011)30:11<3338::AID-IMMU3338>journal_volume
30pub_type
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