Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Antigen sparing strategy could boost bird flu vaccine production

17.08.2007
A strategy to boost worldwide production of the bird flu vaccine could mean many more people receive the vaccine, boosting efforts to contain any future pandemic. The findings are reported in an Article in this week’s edition of The Lancet.

Professor Geert Leroux-Roels, Centre for Vaccinology, Ghent University and Hospital, Belgium and colleagues report on an “antigen sparing adjuvant strategy”, which, by combining the vaccine with an oil-in-water emulsion “adjuvant”, allows the body to produce up to six times as many bird influenza virus neutralising antibodies as it would with an non-adjuvanted vaccine with the same dose.

The bird flu strain H5N1 is widely regarded as the probable cause of the next global influenza pandemic. This virus contains a H5 haemagglutinin antigen subtype, which generally produces a poor immunogenic response in humans and to which most of the world population is immunologically naïve. As a result, the one-dose schedule routinely used for seasonal “regular” influenza vaccines is unlikely to be sufficient to give immunity. The authors say: “Clearly, new formulations that require less antigen per dose are needed. The use of adjuvant to improve immunogenicity is a crucial antigen-sparing strategy.”

The researchers did a study of eight groups of 50 volunteers aged 18-60 years, and studied four antigen doses (3.8µg, 7.5µg, 15µg, 30µg haemagglutinin) given with or without the oil-water adjuvant. Blood samples were then collected to analyse the immune response, and the results showed that the adjuvanted formulations were significantly more immunogenic than the non-adjuvanted formulations at all doses. All eight vaccine formulations had good safety profiles, although the adjuvanted vaccines produced more injection-site symptoms and general symptoms (most of which were mild to moderate and transient) than the non-adjuvanted vaccines.

The authors say that the ability of the 3.8µg dose of the adjuvanted vaccine to induce cross-immunity against the clade two* H5N1 Indonesia strain in more than the three-quarters of individuals with neutralising titres which are six times higher than the non-adjuvanted formulation “represents significant antigen sparing that could increase the number of recipients of the pandemic influenza vaccine.”

They conclude: “The cross-clade neutralising antibody responses recorded imply that such a vaccine could be deployed before pandemic outbreak, which is an important mitigation strategy proposed for pandemic influenza.”

In an accompanying Comment, Dr Suryaprakash Sambhara, Centers for Disease Control and Prevention, Atlanta, Georgia, USA and Dr Gregory Poland, Mayo Clinic and Foundation, Minnesota, USA, say: “Leroux-Roels and colleagues’ study is the first to show significant antigen dose-sparing, high levels of immunogenicity in association with a novel adjuvant, and the induction of cross-clade immunity against A/H5N1 viruses. Their study lends support for considering a strategy of immunising some groups with prepandemic vaccines for preparedness in the event of a pandemic from an H5N1 virus. This vaccine appears to be an important step forward in our ability to protect against the pandemic threat posed by highly pathogenic influenza A/H5N1 viruses.”

Tony Kirby | alfa
Further information:
http://www.thelancet.com/webfiles/images/clusters/thelancet/press_office/vaccine.pdf

More articles from Health and Medicine:

nachricht Purdue cancer identity technology makes it easier to find a tumor's 'address'
16.11.2018 | Purdue University

nachricht Microgel powder fights infection and helps wounds heal
14.11.2018 | Michigan Technological University

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: UNH scientists help provide first-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.

Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

Purdue cancer identity technology makes it easier to find a tumor's 'address'

16.11.2018 | Health and Medicine

Good preparation is half the digestion

16.11.2018 | Life Sciences

Microscope measures muscle weakness

16.11.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>