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Passive EGFR\u2010directed immunotherapy, but not active specific approaches, has already been introduced in medical oncology practice. Then we wonder if mice immunization with the extracellular domain of murine EGFR (mEGFR\u2010ECD) in adjuvants can circumvent tolerance to self EGFR, by inducing an immune response with consequent antitumor effect. The present study demonstrated that despite mEGFR expression in thymus, strong DTH response was induced by inoculation of mice with the mEGFR\u2010ECD. This self\u2010immunization, using both CFA and very small sized proteoliposomes from <jats:italic>Neisseria meningitidis<\/jats:italic> (VSSP), promoted highly specific IgG titers, predominantly IgG2a and IgG2b. Sera from mice immunized with mEGFR\u2010ECD\/VSSP not only recognized EGFR+ tumor cell lines by FACS, but also inhibited their <jats:italic>in vitro<\/jats:italic> growth, even in the absence of complement. Noteworthy, vaccination of mice with mEGFR\u2010ECD\/VSSP stimulated a potent antimetastatic effect in the EGFR+ Lewis lung carcinoma model, while reproduction\u2010associated side effects were absent. Curiously, mice immunized with the human EGFR\u2010ECD (Her1\u2010ECD) in VSSP though induced highly specific IgG antibodies with strong <jats:italic>in vitro<\/jats:italic> cytotoxic effect over EGFR+ human cell lines, showed low cross\u2010reactivity with the mEGFR\u2010ECD. These results further encouraged the development of the Her1\u2010ECD\/VSSP vaccine project for patients with EGFR+ tumors. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ijc.22085","type":"journal-article","created":{"date-parts":[[2006,7,13]],"date-time":"2006-07-13T19:05:21Z","timestamp":1152817521000},"page":"2190-2199","source":"Crossref","is-referenced-by-count":39,"title":["Active antimetastatic immunotherapy in Lewis lung carcinoma with self EGFR extracellular domain protein in VSSP adjuvant"],"prefix":"10.1002","volume":"119","author":[{"given":"Belinda S\u00e1nchez","family":"Ram\u00edrez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo Su\u00e1rez","family":"Pestana","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Greta 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