New Study Published in Nature Provides Further Evidence that COVID-19 Vaccine Induced T-Cell Response Targets Known SARS-CoV-2 Variants of Concern
SEATTLE, June 09, 2021 (GLOBE NEWSWIRE) -- Adaptive Biotechnologies Corporation (Nasdaq: ADPT), a commercial stage biotechnology company that aims to translate the genetics of the adaptive immune system into clinical products to diagnose and treat disease, today announced that immunoSEQ® T-MAP™ COVID was used in the Nature study to measure the T-cell immune response elicited by the Johnson & Johnson COVID-19 vaccine in the context of multiple variants of SARS-CoV-2, including B 1.351 and B.1.1.7. The study provides further evidence that the T-cell response may contribute to protection from COVID-19. Adaptive’s Technology was used to quantify T-cell expansion across all regions of the virus, demonstrating that the T-cell response is broad and unaltered by mutations that render vaccine-generated antibodies less effective. The study was conducted by Beth Israel Deaconess Medical Center (BIDMC) in Boston, MA.
“Our data generated in collaboration with Adaptive Biotechnologies highlight the potent and broad T-cell immune responses induced by the Ad26.COV2.S COVID-19 vaccine in humans, including against virus variants,” said Dan Barouch, M.D., Ph.D., Director of the Center for Virology and Vaccine Research at BIDMC. “Using TCRbeta sequencing together with traditional functional T-cell assays, we are able to understand and quantify T-cell expansion to different parts of the spike protein with precision and scale that wouldn’t have been possible even a few years ago.”
In the multinational phase 3 ENSEMBLE trial, participants given Johnson & Johnson’s vaccine experienced similar efficacy against the B.1.351 variant. To understand the mechanism of protection, the COV1001 phase 1/2 trial analyzed blood samples from 20 vaccinated individuals to measure antibody immune response (humoral immune response) and T-cell response (cellular immune response) against the original SARS-CoV-2 strain WA1/2020 as well as against the B.1.1.7, CAL.20C, P.1., and B.1.351 variants. Post-vaccination, results showed that the levels of neutralizing antibodies were diminished against the variants, but that the T-cell immune response was preserved, suggesting T cells may provide protection against these emerging strains. Results indicate T-cells may be an important correlate of protection and should be considered as an endpoint for vaccine clinical trials.
“These findings support a growing body of evidence that measuring T-cell response is critical to demonstrate immunity and guide development of COVID-19 vaccines, particularly in the growing presence of new variants,” said Harlan Robins, Ph.D., co-founder and chief scientific officer, Adaptive Biotechnologies. “Until recently it has been challenging to incorporate measurement of T-cell response into vaccine clinical trials, but now immunoSEQ T-MAP COVID provides the ability to do this at scale and with precision using blood samples, and this technology can be applied to many different diseases.”
immunoSEQ T-MAP COVID combines the sequencing and mapping capabilities of Adaptive’s immune medicine platform to show how T cells respond to different parts of the virus, including the various parts of the spike protein. Mapping exactly how the variants impact different parts of the virus can indicate if the immune response is likely to be affected.
About the T cell
T cells can “remember” prior infections and kill pathogens if they reappear. Research shows that antibodies to SARS-CoV-2 decline over time. T cells hold important clues to immunity and correlates of protection and need to be studied to assess how long patients remain resistant to reinfection. Given T cells circulate freely in the blood, they are an easy and thus a desirable target for assessing SARS-CoV-2 exposure and potentially immunity.
About immunoSEQ T-MAP COVID
About Adaptive Biotechnologies
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