SARS-CoV-2 Evolution: New Research Findings
- A long-term study of COVID-19 virus mutations has revealed patterns that could help predict the emergence of future variants.
- The findings, published in the Journal of Virology, highlight the virus's adaptability and identify common mutations that arise repeatedly in different strains.
- The researchers examined 11 virus samples from nine different COVID-19 variants,including alpha,delta,and omicron.The samples were grown in monkey kidney cells and subjected to serial passaging,a method used to...
A new study tracking SARS-CoV-2 evolution has uncovered critical patterns that could help predict future COVID-19 variants. Australian researchers, over five years, examined viral mutations in a lab setting, discovering common changes across different strains.These findings, published in the Journal of Virology, identify mutations that repeatedly emerge, perhaps informing future treatment strategies. The research, conducted at UNSW’s School of Biomedical sciences, involved serial passaging of various virus samples, including Alpha, Delta, and omicron, to observe the virus’s adaptability without immune system or treatment influences. The study highlights how the virus is predisposed to certain changes irrespective of external pressures. This proactive approach could help anticipate viral evolution. News Directory 3 can help you understand the implications for understanding future variants of concern. Discover what’s next in this constantly evolving landscape.
COVID-19 Mutation Patterns Offer Clues to Future Variants
A long-term study of COVID-19 virus mutations has revealed patterns that could help predict the emergence of future variants. Australian researchers, studying the virus over five years, aimed to understand how SARS-CoV-2 evolves and whether it weakens over time.
The findings, published in the Journal of Virology, highlight the virus’s adaptability and identify common mutations that arise repeatedly in different strains. Dr. Charles Foster, the study’s first author from UNSW’s School of Biomedical Sciences, said the research could help anticipate future viral evolution and inform treatment and prevention design.
The researchers examined 11 virus samples from nine different COVID-19 variants,including alpha,delta,and omicron.The samples were grown in monkey kidney cells and subjected to serial passaging,a method used to study viral changes. This involved transferring the virus from one batch of cells to another repeatedly, between 33 and 100 times.
Dr. Foster noted that studying the virus in a controlled lab environment provides a clearer picture of its natural evolutionary pathways, free from the influence of the immune system or treatments. The passaging was conducted in a secure laboratory and did not aim to increase the virus’s transmissibility or severity.
The researchers tracked genetic code changes during passage, noting the appearance and persistence of mutations.They observed both new mutations and changes mirroring those seen in real-world outbreaks.William Rawlinson, a Conjoint Professor with the School of Biomedical Sciences, said the similarities suggest the virus might potentially be naturally inclined to develop certain changes, irrespective of external pressures.
Rawlinson added that some changes seen in humans also occurred in vitro, suggesting that factors beyond transmissibility or immune evasion influence viral evolution. While many changes occurred in the spike protein, other parts of the virus also mutated, sometimes at higher rates. Several mutations are known to reduce the effectiveness of certain vaccines.
“This work could help us anticipate how the virus might evolve next. If we can identify mutations that arise repeatedly —even in a lab setting—it gives us a chance to predict which changes could emerge in the real world, so we can prepare for them,” Dr. Foster said.
What’s next
The researchers have made their sequencing data and analysis code publicly available. Further research is needed to understand how the repeat mutations compare to real-world infections, but Foster suspects the virus will continue adapting long term, subject to more evolutionary pressures.