A TLR9 agonist enhances therapeutic effects of telomerase genetic vaccine

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• 作者：Antonella Conforti ; Barbara Cipriani ; Daniela Peruzzi ; Sridhar Dharmapuri ; Ekambar R. K ; imalla ; Sudhir Agrawal ; Federica Mori ; Gennaro Ciliberto ; Nicola La Monica ; Luigi Aurisicchio
• 关键词：Cancer vaccine ; TERT ; IMO ; Innate immunity
• 刊名：Vaccine
• 出版年：2010
• 出版时间：30 April 2010
• 年：2010
• 卷：28
• 期：20
• 页码：3522-3530
• 全文大小：1200 K

文摘

The telomerase reverse transcriptase (TERT) is an attractive target for cancer vaccination because its expression is reactivated in most tumors. In this study, we have evaluated the ability of a genetic vaccine targeting murine TERT (mTERT) based on DNA electroporation (DNA-EP) and adenovirus serotype 6 (Ad6) to exert therapeutic effects in combination with a novel TLR9 agonist, referred to as immune modulatory oligonucleotide (IMO), as an adjuvant. IMO was administered to mice at the same time as vaccine. IMO induced dose-dependent cytokine secretion and activation of NK cells. Most importantly, vaccination of mice with IMO in combination with mTERT vaccine conferred therapeutic benefit in tumor bearing animals and this effect was associated with increased NK, DC and T cell tumor infiltration. These data show that appropriate combination of a DNA-EP/Ad6-based cancer vaccine against TERT with IMO induces multiple effects on innate and adaptive immune responses resulting in a significant antitumor efficacy.