Longitudinal Study after Sputnik V Vaccination Shows Durable SARS-CoV-2 Neutralizing Antibodies and Reduced Viral Variant Escape to Neutralization over Time

María M. Gonzalez Lopez Ledesma, Lautaro Sanchez, Diego S. Ojeda, Santiago Oviedo Rouco, Andrés H. Rossi, Augusto Varese, Ignacio Mazzitelli, Carla A. Pascuale, Esteban A. Miglietta, Pamela E. Rodríguez, Horacio M. Pallarés, Guadalupe S. Costa Navarro, Julio J. Caramelo, Paul W. Rothlauf, Zhuoming Liu, Louis Marie Bloyet, Marjorie Cornejo Pontelli, Natali B. Rasetto, Shirley D. Wenker, Lila Y. RamisMagalí G. Bialer, María Jose de Leone, C. Esteban Hernando, Luciana Bianchimano, Antonella S. Ríos, María Soledad Treffinger Cienfuegos, Diana R. Rodriguez García, Yesica Longueira, Natalia Laufer, Diego Alvarez, Ana Ceballos, Valeria Ochoa, Cecilia Monzani, Gariela Turk, Melina Salvatori, Jorge Carradori, Katherine Prost, Alejandra Rima, Claudia Varela, Regina Ercole, Rosana I. Toro, Sebastian Gutierrez, Martín Zubieta, Dolores Acuña, Mercedes S. Nabaes Jodar, Carolina Torres, Laura Mojsiejczuk, Mariana Viegas, Pilar Velazquez, Clarisa Testa, Nicolas Kreplak, Marcelo Yanovsky, Sean Whelan, Jorge Geffner, Marina Pifano, Andrea V. Gamarnik

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Recent studies have shown a temporal increase in the neutralizing antibody potency and breadth to SARS-CoV-2 variants in coronavirus disease 2019 (COVID-19) convalescent individuals. Here, we examined longitudinal antibody responses and viral neutralizing capacity to the B.1 lineage virus (Wuhan related), to variants of concern (VOC; Alpha, Beta, Gamma, and Delta), and to a local variant of interest (VOI; Lambda) in volunteers receiving the Sputnik V vaccine in Argentina. Longitudinal serum samples (N = 536) collected from 118 volunteers obtained between January and October 2021 were used. The analysis indicates that while anti-spike IgG levels significantly wane over time, the neutralizing capacity for the Wuhan-related lineages of SARS-CoV-2 and VOC is maintained within 6 months of vaccination. In addition, an improved antibody cross-neutralizing ability for circulating variants of concern (Beta and Gamma) was observed over time postvaccination. The viral variants that displayed higher escape to neutralizing antibodies with respect to the original virus (Beta and Gamma variants) were the ones showing the largest increase in susceptibility to neutralization over time after vaccination. Our observations indicate that serum neutralizing antibodies are maintained for at least 6 months and show a reduction of VOC escape to neutralizing antibodies over time after vaccination. IMPORTANCE Vaccines have been produced in record time for SARS-CoV-2, offering the possibility of halting the global pandemic. However, inequalities in vaccine accessibility in different regions of the world create a need to increase international cooperation. Sputnik V is a recombinant adenovirus-based vaccine that has been widely used in Argentina and other developing countries, but limited information is available about its elicited immune responses. Here, we examined longitudinal antibody levels and viral neutralizing capacity elicited by Sputnik V vaccination. Using a cohort of 118 volunteers, we found that while anti-spike antibodies wane over time, the neutralizing capacity to viral variants of concern and local variants of interest is maintained within 4 months of vaccination. In addition, we observed an increased cross-neutralization activity over time for the Beta and Gamma variants. This study provides valuable information about the immune response generated by a vaccine platform used in many parts of the world.

Original languageEnglish
Article numbere03442
JournalmBio
Volume13
Issue number1
DOIs
StatePublished - Feb 1 2022

Keywords

  • COVID-19
  • SARS CoV-2
  • Sputnik V
  • Viral variants

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