Yu Liu1, Haiyan Zhu2, Laiming Mo3, Rui Xu1, Xiangyun Li1, Tian Li4, Liang Zhao5, Yi Ren6, Rongying Ou2, Yunsheng Xu1. 1. Department of Dermatovenereology, The Seventh Affiliated Hospital, Sun Yat-Sen University Shenzhen 518107, Guangdong, China. 2. Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Wenzhou Medical University Wenzhou 325000, Zhejiang, China. 3. Department of Clinical Laboratory, The Seventh Affiliated Hospital, Sun Yat-Sen University Shenzhen 518107, Guangdong, China. 4. Department of Gynaecology and Obstetrics, The Seventh Affiliated Hospital, Sun Yat-Sen University Shenzhen 518107, Guangdong, China. 5. Laboratory for Advanced Interdisciplinary Research, Institutes of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University Wenzhou 325000, Zhejiang, China. 6. Department of Biomedical Sciences, Florida State University College of Medicine Tallahassee, FL 32306, USA.
Abstract
OBJECTIVES: Cervical cancer is the second leading cause of cancer death in women, which is closely related to persistent infection with high-risk Human papillomavirus (HPV). Therefore, it is important to develop new adjuvants for HPV vaccines. This research aimed to establish two new adjuvants which can enhance the immune effect of vaccines. MATERIALS AND METHODS: C57BL/6 mice were divided into 5 groups and immunized by intramuscular injection of plasmid once every 2 weeks, three times in all. The growth and metastasis of tumors in mice was observed by in vivo imaging system (IVIS). Then, the mice were sacrificed and the pathological changes of organs were observed. In addition, the lymphocyte suspension was used for CLT killing test. IFN-γ level and the number of splenocytes which secrete IFN-γ were detected. Additionally, the specific antibody level of HPV16/18 E6 E7 L1 L2 was also detected. RESULTS: The constructed nucleic acid vaccines had no significant effect on both the physiological and biochemical indexes, while it significantly increased the survival period and survival rate of mice. Flt3L and GM-CSF enhanced the immune effect of HPV16/18 vaccine via increasing the specific antibodies and IFN-γ cytokines. CONCLUSIONS: These data suggested that Flt3L and GM-CSF enhanced the anti-tumor effect of vaccines via increasing immune response. Thereby, our findings may hope to provide new perspective for the treatment of cervical cancer. AJTR
OBJECTIVES: Cervical cancer is the second leading cause of cancer death in women, which is closely related to persistent infection with high-risk Human papillomavirus (HPV). Therefore, it is important to develop new adjuvants for HPV vaccines. This research aimed to establish two new adjuvants which can enhance the immune effect of vaccines. MATERIALS AND METHODS: C57BL/6 mice were divided into 5 groups and immunized by intramuscular injection of plasmid once every 2 weeks, three times in all. The growth and metastasis of tumors in mice was observed by in vivo imaging system (IVIS). Then, the mice were sacrificed and the pathological changes of organs were observed. In addition, the lymphocyte suspension was used for CLT killing test. IFN-γ level and the number of splenocytes which secrete IFN-γ were detected. Additionally, the specific antibody level of HPV16/18 E6 E7 L1 L2 was also detected. RESULTS: The constructed nucleic acid vaccines had no significant effect on both the physiological and biochemical indexes, while it significantly increased the survival period and survival rate of mice. Flt3L and GM-CSF enhanced the immune effect of HPV16/18 vaccine via increasing the specific antibodies and IFN-γ cytokines. CONCLUSIONS: These data suggested that Flt3L and GM-CSF enhanced the anti-tumor effect of vaccines via increasing immune response. Thereby, our findings may hope to provide new perspective for the treatment of cervical cancer. AJTR
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