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Peng, Shiwen; Tu, Hsin-Fang; Cheng, Michelle; Hu, Ming-Hung; Tsai, Hua-Ling; Tsai, Ya-Chea; Koenig, Chelsea; Brayton, Cory; Wang, Hao; Chang, Yung-Nien; Arend, Rebecca C; Levinson, Kimberly; Roden, Richard B S; Wu, T C; Hung, Chien-Fu
MBio, 10/2023, Volume: 14, Issue: 5Journal Article
Respectively, HPV16 and HPV18 cause 50% and 20% of cervical cancer cases globally. Viral proteins E6 and E7 are obligate drivers of oncogenic transformation. We recently developed a candidate therapeutic DNA vaccine, pBI-11, that targets HPV16 and HPV18 E6 and E7. Single-site intramuscular delivery of pBI-11 via a needle elicited therapeutic anti-tumor effects in mice and is now being tested in high-risk human papillomavirus+ head and neck cancer patients (NCT05799144). Needle-free biojectors such as the Tropis device show promise due to ease of administration, high patient acceptability, and the possibility of improved delivery. For example, vaccination of patients with the ZyCoV-D DNA vaccine using the Tropis device is effective against COVID19, well tolerated, and licensed. Here we show that split-dose, multi-site administration and intradermal delivery via the Tropis biojector increase the delivery of pBI-11 DNA vaccine, enhance HPV antigen-specific CD8+ T-cell responses, and improve anti-tumor therapeutic effects, suggesting its translational potential to treat HPV16/18 infection and disease.
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