Interferon γ limits the effectiveness of melanoma peptide vaccines
Interferon γ limits the effectiveness of melanoma peptide vaccines
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DOI:
10.1182/blood-2010-08-298117
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发表时间:
2011-01-06
期刊:
影响因子:
20.3
通讯作者:
Celis, Esteban
中科院分区:
文献类型:
--
作者:
Cho, Hyun-Il;Lee, Young-Ran;Celis, Esteban
The development of effective therapeutic vaccines to generate tumor-reactive cytotoxic T lymphocytes (CTLs) continues to be a top research priority. However, in spite of some promising results, there are no clear examples of vaccines that eradicate established tumors. Most vaccines are ineffective because they generate low numbers of CTLs and because numerous immunosuppressive factors abound in tumor-bearing hosts. We designed a peptide vaccine that produces large numbers of tumor-reactive CTLs in a mouse model of melanoma. Surprisingly, CTL tumor recognition and antitumor effects decreased in the presence of interferon gamma (IFN gamma), a cytokine that can provide therapeutic benefit. Tumors exposed to IFN gamma evade CTLs by inducing large amounts of noncognate major histocompatibility complex class I molecules, which limit T-cell activation and effector function. Our results demonstrate that peptide vaccines can eradicate large, established tumors in circumstances under which the inhibitory activities of IFN gamma are curtailed. (Blood. 2011;117(1):135-144)