Antitumor Response to a Codon-Optimized HPV-16 E7/HSP70 Fusion Antigen DNA Vaccine.
نویسندگان
چکیده
BACKGROUND Vaccines based on virus-like particles are effective against Human Papilloma Virus (HPV) infection; however, they have not shown a therapeutic effect against HPV-associated diseases. New immunotherapy strategies based on immune responses against tumor antigens can positively affect the clearance of HPV-associated lesions. OBJECTIVE To generate two therapeutic fusion DNA vaccines (optimizedE7/mouseHSP70 and wildE7/mouseHSP70) to induce antitumor specific responses in mice models. METHODS Mice were immunized with recombinant DNA vaccines. The splenocytes of immunized mice were collected and lactate dehydrogenase and IFN-γ productions were measured after three injections in order to evaluate cytotoxic T lymphocytes (CTLs) activity. MTT assay was carried out for lymphocyte stimulation. RESULTS The fusion DNA vaccines, specifically uE7-HSP70, elicited varying levels of IFN-γ and CTLs responses compared to the control group (P<0.05). Furthermore, antitumor response and tumor size reduction in fusion DNA vaccines groups were significantly higher than in the negative control group (P<0.05). CONCLUSION It is concluded that our fusion DNA vaccines considerably enhanced specific cellular responses against HPV tumor model. In addition, optimized E7 showed a notable immunogenicity and inhibitory effect on the reduction of tumor size.
منابع مشابه
Antitumor Response to a Codon-Optimized HPV-16 E7/HSP70 Fusion Antigen DNA Vaccine
Background: Vaccines based on virus-like particles are effective against Human Papilloma Virus (HPV) infection; however, they have not shown a therapeutic effect against HPV-associated diseases. New immunotherapy strategies based on immune responses against tumor antigens can positively affect the clearance of HPV-associated lesions. Objective: To generate two therapeutic fusion DNA vaccines (o...
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ورودعنوان ژورنال:
- Iranian journal of immunology : IJI
دوره 14 3 شماره
صفحات -
تاریخ انتشار 2017