Safety and Immunity of Covid-19 aAPC Vaccine

  • End date
    Dec 31, 2024
  • participants needed
  • sponsor
    Shenzhen Geno-Immune Medical Institute
Updated on 1 March 2022


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.



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.


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.

  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.

Condition Treat and Prevent Covid-19 Infection
Treatment Pathogen-specific aAPC
Clinical Study IdentifierNCT04299724
SponsorShenzhen Geno-Immune Medical Institute
Last Modified on1 March 2022


Yes No Not Sure

Inclusion Criteria

Healthy and Covid-19-positive volunteers
The interval between the onset of symptoms and randomized is within 7 days in Covid-19 patients. The onset of symptoms is mainly based on fever. If there is no fever, cough or other related symptoms can be used
White blood cells 3,500/l, lymphocytes 750/l
Human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV) or tuberculosis (TB) test negative
Sign the Informed Consent voluntarily

Exclusion Criteria

Subject with active HCV, HBV or HIV infection
Subject is albumin-intolerant
Subject with life expectancy less than 4 weeks
Subject participated in other investigational vaccine therapies within the past 60 days
Subject with positive pregnancy test result
Researchers consider unsuitable
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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