Recombinant chimpanzee adenovirus vector vaccine expressing the spike protein provides effective and lasting protection against SARS-CoV-2 infection in mice.

Abstract

SARS-CoV-2 infection is a global public health threat. Vaccines are considered amongst the most important tools to control the SARS-CoV-2 pandemic. As expected, deaths from SARS-CoV-2 infection have dropped dramatically with widespread vaccination. However, there are concerns over the duration of vaccine-induced protection, as well as their effectiveness against emerging variants of concern. Here, we constructed a recombinant chimpanzee adenovirus vectored vaccine expressing the full-length spike of SARS-CoV-2 (AdC68-S). Rapid and high levels of humoral and cellular immune responses were observed after immunization of C57BL/6J mice with one or two doses of AdC68-S. Notably, neutralizing antibodies were observed up to at least six months after vaccination, without substantial decline. Single or double doses AdC68-S immunization resulted in lower viral loads in lungs of mice against SARS-CoV-2 challenge both in the short term (21 days) and long-term (6 months). Histopathological examination of AdC68-S immunized mice lungs showed mild histological abnormalities after SARS-CoV-2 infection. Taken together, this study demonstrates the efficacy and durability of the AdC68-S vaccine and constitutes a promising candidate for clinical evaluation.

• Authors: Mingqing Lu, Kunpeng Liu, Yun Peng, Zhe Ding, Yingwen Li, Alexander Tendu, Xue Hu, Ge Gao, Weiwei Guo, Hang Liu, Juhong Rao, Jiaxuan Zhao, Miaoyu Chen, Zhiming Yuan, Gary Wong, Chao Shan, Yanfeng Yao, Jiaming Lan
• Journal: Virologica Sinica (Virol Sin) Vol. 37 Issue 4 Pg. 581-590 (Aug 2022) ISSN: 1995-820X [Electronic] Netherlands
• PMID: 35659605 (Publication Type: Journal Article)
• Copyright: Copyright © 2022 The Authors. Publishing services by Elsevier B.V. All rights reserved.

Chemical References

• Antibodies, Neutralizing
• Antibodies, Viral
• Spike Glycoprotein, Coronavirus
• Vaccines, Synthetic
• Viral Vaccines
• spike protein, SARS-CoV-2

Topics

• Adenoviridae (genetics)
• Animals
• Antibodies, Neutralizing
• Antibodies, Viral
• COVID-19 (prevention & control)
• Mice
• Mice, Inbred C57BL
• Pan troglodytes
• SARS-CoV-2 (genetics)
• Spike Glycoprotein, Coronavirus (genetics)
• Vaccination
• Vaccines, Synthetic
• Viral Vaccines