Recent reports of poliovirus detected in samples from a sewage treatment works in London have rightly generated significant concern among public health agencies and medical staff. The poliovirus detected is what is called vaccine-derived poliovirus this is not wild poliovirus.
There are currently two poliovirus vaccines: the oral poliovirus vaccine (OPV) and the inactivated poliovirus vaccine (IPV). Vaccine-derived poliovirus is linked to the use of the OPV as this vaccine uses weakened poliovirus to produce an immune response.
The weakened poliovirus can still infect people and be shed by the vaccinated person. This can result in the weakened virus spreading from person to person. And in rare cases, this weakened poliovirus can change to a more dangerous strain of the virus that can cause disease.
In areas with high levels of vaccination, the community is protected and the spread of the more dangerous virus is stopped. But in areas with lower vaccination rates, unvaccinated people may be exposed to poliovirus that has originated as a weakened vaccine strain but is now a more dangerous version. This virus is referred to as a vaccine-derived poliovirus.
As the global vaccine initiatives have resulted in the near eradication of poliovirus, the number of cases of vaccine-derived poliovirus has overtaken the number of infections with wildtype poliovirus. In 2021, there were 697 new cases of vaccine derive poliovirus compared with just six cases of wildtype poliovirus, globally.
Vaccination with IPV does not immunise people with an infectious virus. Instead, it uses poliovirus that has been chemically inactivated. This means the virus is unable to infect people, removing the risk of vaccine-derived poliovirus. This vaccine is considered very safe. For this reason, many countries have moved away from using OPV and adopted IPV.
The UK switched from using OPV to IPV in 2004. However, OPV remains an incredibly effective vaccine that has been instrumental in bringing about the near eradication of poliovirus and remains widely used throughout the world.
While there is no risk of vaccine-derived poliovirus infection when using the IPV, the making of IPV does lead to a potential biohazard risk. To make IPV, large volumes of infectious poliovirus must be produced and then inactivated. This large-scale production of poliovirus has inherent risks and any breach of biocontainment in a population with low vaccine coverage can have serious consequences as poliovirus could be reintroduced.
Vaccination strategies with either OPV or IPV, therefore, involve a certain level of risk. In either case, the risk is astonishingly low. However, for some time scientists have been seeking to develop new and safer methods for poliovirus vaccination. One potential candidate for a new poliovirus vaccine is the use of virus-like particles (VLPs).
VLPs are assembled from the proteins that make up the outer shell of the virus, called a capsid. This allows the immune system to react to this empty shell and triggers a protective immune memory response, so the next time the immune system is exposed to a viral capsid (such as in the case of a viral infection), it can generate an effective response that rapidly controls and eliminates the virus.
Because VLPs contain no genetic material from the virus, they are safe to manufacture and use without the risk of spreading the actual disease. This method has already been used very effectively to produce the human papillomavirus vaccine.
A further advantage of using VLP vaccines for a disease such as poliovirus is the potential to produce VLPs in production systems such as yeast. At the University of Leeds, we have shown that yeast can be made to produce poliovirus VLPs and then grown in large quantities.
The production system for these VLPs uses a similar infrastructure to other yeast-based manufacturing, such as the brewing of beer. This means that large quantities of VLPs can be produced quickly and safely in a very cost-effective way.
Go here to see the original:
Polio: we're developing a safer vaccine that uses no genetic material from the virus - The Conversation
- Is ALS Hereditary? Genetics, Inheritance Patterns, and More - Healthline - May 5th, 2024
- Leveraging functional genomic annotations and genome coverage to improve polygenic prediction of complex traits ... - Nature.com - May 5th, 2024
- Genetic association of inflammatory marker GlycA with lung function and respiratory diseases - Nature.com - May 5th, 2024
- Exome sequencing reveals genetic heterogeneity and clinically actionable findings in children with cerebral palsy - Nature.com - May 5th, 2024
- Investigation of inherited noncoding genetic variation impacting the pharmacogenomics of childhood acute ... - Nature.com - May 5th, 2024
- Pitfalls in the genetic testing of the OPN1LW-OPN1MW gene cluster in human subjects | npj Genomic Medicine - Nature.com - May 5th, 2024
- Reply to: Pitfalls in the genetic testing of the OPN1LW-OPN1MW gene cluster in human subjects | npj Genomic Medicine - Nature.com - May 5th, 2024
- Lifespan is influenced more by lifestyle than genetics - Earth.com - May 5th, 2024
- Scientists discover over 100 new genomic regions linked to blood pressure - National Institutes of Health (NIH) (.gov) - May 5th, 2024
- Genetics studies have a diversity problem that researchers struggle to fix - The Lund Report - May 5th, 2024
- Researchers discover the genetic cause of the most common brain malformation - EL PAS USA - May 5th, 2024
- Genetic link between adolescent drinking and adult anxiety may offer therapy target | UIC today - UIC Today - May 5th, 2024
- Phylogenomics and genetic analysis of solvent-producing Clostridium species | Scientific Data - Nature.com - May 5th, 2024
- New genes are involved in the adaptation of acorn barnacles to sessile life - Nature.com - May 5th, 2024
- Rachel Khong explores genetics, race and the idea of being American in new novel - Wyoming Public Media - May 5th, 2024
- Genetic testing led to early cancer detection for father, daughter - Roswell Park Comprehensive Cancer Center - May 5th, 2024
- EYE ON HEALTH: High risk and genetic testing being offered at local hospital - Local 3 News - May 5th, 2024
- Fatty Liver: Is It Hereditary? - Healthline - May 5th, 2024
- Southern Seven Health Department to expand genetic cancer testing - KFVS - May 5th, 2024
- Genetic associations of key genes in breast cancer pathogenesis - News-Medical.Net - May 5th, 2024
- Mating Study Unlocks the Genetic Code of Attraction - Neuroscience News - March 18th, 2024
- Mindfulness in your DNA? Capacity to be present is partly a function of genetics, study finds - PsyPost - March 18th, 2024
- Genetic testing scam targets Medicare recipients, including those in Spokane - KXLY Spokane - March 18th, 2024
- Some people are genetically predisposed to gain weight. These 5 tips can help - CNN - March 18th, 2024
- SOPHiA GENETICS and The French Kidney Cancer Research Network (UroCCR) Publish Results from Multiyear ... - PR Newswire - March 18th, 2024
- Tissue samples show the deep genetic and cellular impacts of smoking - Medical Xpress - March 18th, 2024
- The regulatory landscape of chromatin accessibility - Nature.com - March 18th, 2024
- Genome assemblies of 11 bamboo species highlight diversification induced by dynamic subgenome dominance - Nature.com - March 18th, 2024
- Research reveals the genetic code behind non-identical twins - Medical Xpress - March 18th, 2024
- How genetic therapies transformed the lives of sickle cell patients - KPVI News 6 - March 18th, 2024
- The Next Wave of Privacy Litigation: The Illinois Genetic Information Privacy Act - Perkins Coie - March 18th, 2024
- State initiates study on genetic cancers, Lynch Syndrome - The Times of India - March 18th, 2024
- How genetic therapies transformed the lives of sickle cell patients - Citizentribune - March 18th, 2024
- Dr Plichta on Areas of Interest for Genetic Testing Research in Breast Cancer - OncLive - March 18th, 2024
- The Genetic History of the Jews Mosaic - Mosaic - March 18th, 2024
- New insights into genetic mechanisms could improve treatment of liver fibrosis - Medical Xpress - March 18th, 2024
- 5 Questions To Ask About The Ethics Of Genetic Data - Forbes - March 18th, 2024
- Couple raising money to fix sons club feet caused by rare genetic condition - 21 Alive News - February 18th, 2024
- What can bulls tell us about men? Genetic discovery could translate to human fertility research - Medical Xpress - February 18th, 2024
- Legislation seeks to bar life insurance companies from purchasing recreational genetic testing data - Delaware First Media - February 18th, 2024
- Family-based study identifies potential new genetic factors linked to Alzheimer's risk in people with African ancestry - National Institute on Aging - February 18th, 2024
- Genetic determinants of micronucleus formation in vivo - Nature.com - February 18th, 2024
- Near-gapless and haplotype-resolved apple genomes provide insights into the genetic basis of rootstock-induced ... - Nature.com - February 18th, 2024
- Accurate and sensitive mutational signature analysis with MuSiCal - Nature.com - February 18th, 2024
- CRISPR, the Genetic Revolution of the 21st Century | OpenMind - BBVA OpenMind - February 18th, 2024
- Genetic control of thermomorphogenesis in tomato inflorescences - Nature.com - February 18th, 2024
- Natural selection and genetic diversity maintenance in a parasitic wasp during continuous biological control application - Nature.com - February 18th, 2024
- Understanding how natural genetic variation contributes to adaptive responses to low oxygen - News-Medical.Net - February 18th, 2024
- Division of Epidemiology and Genetics - Epidemiology and Genetics - University of Southern California - February 18th, 2024
- Genetic study clarifies the link between birth weight and adult morbidity - Medical Xpress - February 18th, 2024
- AI and genetics underpin project to speed up CVD diagnosis and personalise treatment - Hospital Healthcare - February 18th, 2024
- Study Reveals Complex Interaction Between Genetics and Environment in Brain Functioning - Medriva - February 18th, 2024
- Unraveling the Impact of Genetics and Socioeconomic Status on Behavioral and Psychiatric Traits - Medriva - February 18th, 2024
- Genetic Investigation Reveals CETP Gene Variants Linked to Cardiovascular Resilience in Genome-Wide Association ... - Physician's Weekly - December 30th, 2023
- Raha Kapoor's blue eyes remind fans of her great-grandfather, Raj Kapoor; here's what genetics says - IndiaTimes - December 30th, 2023
- Genetic clue to pericarditis inflammation points to promising new treatments - News-Medical.Net - December 30th, 2023
- Certain genetic predispositions may increase risk of atrial fibrillation among those with high alcohol consumption - 2 Minute Medicine - December 30th, 2023
- Understanding the genetic basis of hereditary diffuse gastric cancer - News-Medical.Net - December 30th, 2023
- Genetic engineering was meant to save chestnut trees. Then there was a mistake. - The Washington Post - December 30th, 2023
- Unraveling the mystery of hereditary diffuse gastric cancer - EurekAlert - December 30th, 2023
- What is Genetics? | AMNH - American Museum of Natural History - December 22nd, 2023
- Who killed Shelley Connolly? Genetic genealogy leads authorities to a suspect and a conviction - Alaska's News Source - December 22nd, 2023
- C.S. Lewis, Atheism, and the Genetic Fallacy - Word on Fire - December 22nd, 2023
- FDA approves first genetic test to assess opioid addiction risk using DNA sample - Fox News - December 22nd, 2023
- Genetic blueprint of wild grapes could help breed better grapes - University of California, Davis - December 22nd, 2023
- Unlocking the genetic secrets of grape seedlessness - Phys.org - December 22nd, 2023
- Unlocking the genetic secrets of drought resilience in Persian walnuts - Phys.org - December 22nd, 2023
- FDA approves genetic test to assess patients risk of developing an opioid addiction - KXAN.com - December 22nd, 2023
- How researchers are CReATiNG synthetic chromosomes faster and cheaper - EurekAlert - December 22nd, 2023
- The promise of genetic therapies in sickle cell disease - The Lancet - December 22nd, 2023
- Assessment of genetic diversity, population structure and wolf-dog hybridisation in the Eastern Romanian Carpathian ... - Nature.com - December 22nd, 2023
- Genetics and Heart Disease: What you need to know - IndiaTimes - December 22nd, 2023
- How to become a geneticist - University of Sydney - December 22nd, 2023
- Study sheds light on the ancestry and genetics of Coast Salish woolly dogs | News | Vancouver Island University ... - Vancouver Island University News - December 22nd, 2023
- Human genetics | Description, Chromosomes, & Inheritance - December 13th, 2023
- BASIC GENETICS INFORMATION - Understanding Genetics - NCBI Bookshelf - December 13th, 2023
- Introduction to Genetics - Open Textbook Library - December 13th, 2023
- Clues to preventing Alzheimer's come from patient who, despite genetics, evaded disease Washington University ... - Washington University School of... - December 13th, 2023
- Environmental stress rather than genetics influenced height differences in early Neolithic people: Study - Phys.org - December 13th, 2023
- What is trisomy 18? Why the fatal genetic disorder is in the news and what it's like to get the diagnosis. - Yahoo Life - December 13th, 2023