NCT04299724

Safety and Immunity of Covid-19 aAPC Vaccine

Safety and Immunity Evaluation of A Covid-19 Coronavirus Artificial Antigen Presenting Cell Vaccine

• Status: Unknown
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 100 (estimated)
• Sponsor: Shenzhen Geno-Immune Medical Institute · Academic / Other
• Sex: All
• Age: 6 Months – 80 Years
• Healthy volunteers: Not accepted

Summary

In December 2019, viral pneumonia (Covid-19) caused by a novel beta-coronavirus (SARS-CoV-2) broke out in Wuhan, China. Some patients rapidly progressed and suffered severe acute respiratory failure and died, making it imperative to develop a safe and effective vaccine to treat and prevent severe Covid-19 pneumonia. Based on detailed analysis of the viral genome and search for potential immunogenic targets, a synthetic minigene has been engineered based on conserved domains of the viral structural proteins and a polyprotein protease. The infection of Covid-19 is mediated through binding of the Spike protein to the ACEII receptor, and the viral replication depends on molecular mechanisms of all of these viral proteins. This trial proposes to develop universal vaccine and test innovative Covid-19 minigenes engineered based on multiple viral genes, using an efficient lentiviral vector system (NHP/TYF) to express viral proteins and immune modulatory genes to modify artificial antigen presenting cells (aAPC) and to activate T cells. In this study, the safety and immune reactivity of this aAPC vaccine will be investigated.

Detailed description

Background: The 2019 discovered new coronavirus, SARS-CoV-2, is an enveloped positive strand single strand RNA virus. The number of SARS-CoV-2 infected people has increased rapidly and WHO has warned that the pandemic spread of Covid-19 is imminent and would have disastrous outcomes. Covid-19 could pose a serious threat to human health and the global economy. There is no vaccine available or clinically approved antiviral therapy as yet. This study aims to evaluate the safety and immune reactivity of a genetically modified aAPC universal vaccine to treat and prevent Covid-19. Objective: Primary study objectives: Injection of Covid-19/aAPC vaccine to volunteers to evaluate the safety. Secondary study objectives: To evaluate the anti- Covid-19 reactivity of the Covid-19/aAPC vaccine. Design: 1. Based on the genomic sequence of the new coronavirus SARS-CoV-2, select conserved and critical structural and protease protein domains to engineer lentiviral minigenes to express SARS-CoV-2 antigens. 2. The Covid-19/aAPC vaccine is prepared by applying lentivirus modification including immune modulatory genes and the viral minigenes, to the artificial antigen presenting cells (aAPCs). The Covid-19/aAPCs are then inactivated for proliferation and extensively safety tested. 3. The subjects receive a total of 5x10\^ 6 cells each time by subcutaneous injection at 0, 14 and 28 days. The subjects are followed-up with peripheral blood tests at 0, 14, 21, 28 and 60 days until the end of the test.

Conditions

• Treat and Prevent Covid-19 Infection

Interventions

Type	Name	Description
BIOLOGICAL	Pathogen-specific aAPC	The subjects will receive three injections of 5x10\^6 each Covid-19/aAPC vaccine via subcutaneous injections.

Timeline

• Start date: 2020-02-15
• Primary completion: 2023-07-31
• Completion: 2024-12-31
• First posted: 2020-03-09
• Last updated: 2020-03-09

Locations

1 site across 1 country: China