Abstract
BackgroundImmunotherapy of patients suffering from the human epidermal growth factor receptor 2 overexpressing (HER-2+) breast cancers with the anti-HER-2 antibodies results in increase of the patients’ overall survival. However, no prophylactic vaccine is available against HER-2+ breast cancers. Although, prophylactic vaccine for human hepatitis B virus (HBV) is very effective.Specific aimThe specific aim of this work was to design, synthesize, and test bio-molecules which would engage prophylactic immunity against hepatitis B virus towards killing breast cancers cells.Methods and ResultsBy biomolecular engineering, we have created a novel family of biomolecules: antibody (anti-HER-2) × vaccine (HBsAg) engineered constructs (AVEC: anti-HER-2 × HBsAg). These biomolecules were utilized for redirecting, accelerating, and amplifying of the vaccination-induced, prophylactic immunity originally targeted against HBV as therapeutic immunity, newly targeted against HER-2+ breast cancers. Treatment of the HER-2+ breast cancer cells with AVEC: anti-HER-2 × HBsAg in blood of the patients, vaccinated with HBsAg, rapidly increased efficacy of killing of HER-2+ breast cancer cells over that attained with the naked anti-HER-2 antibodies.ConclusionNovel antibody-vaccine engineered constructs (AVEC) facilitate redirecting, accelerating, and amplifying of prophylactic, HBV vaccination-induced immunity as immunotherapy (RAAVIIT) of HER-2+ breast cancer. We currently streamline this novel therapeutic paradigm into clinical trials of breast and other cancers.
Highlights
Immunotherapy of patients suffering from the human epidermal growth factor receptor 2 overexpressing (HER-2+) breast cancers with the anti-HER-2 antibodies results in increase of the patients’ overall survival
By biomolecular engineering, we have created a novel family of biomolecules: antibody × vaccine (HBsAg) engineered constructs (AVEC: anti-HER-2 × hepatitis B surface antigen (HBsAg))
These biomolecules were utilized for redirecting, accelerating, and amplifying of the vaccination-induced, prophylactic immunity originally targeted against hepatitis B virus (HBV) as therapeutic immunity, newly targeted against HER-2+ breast cancers
Summary
Immunotherapy of patients suffering from the human epidermal growth factor receptor 2 overexpressing (HER-2+) breast cancers with the anti-HER-2 antibodies results in increase of the patients’ overall survival. Prophylactic vaccine for human hepatitis B virus (HBV) is very effective. Almost 30 % of those cancers overexpressed genes Erbb-B2; diagnosed as HER-2+ breast cancers These cancers are associated with shorter times to relapses, as well as, shorter overall survivals, than those that did not overexpress Erb-B2 (HER2-). These data strongly support administering immunotherapy with antibodies against HER-2 [2,3,4,5].
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