Nav: Home

Novel vaccine strategy produces rapid and long-term protection against Chikungunya virus

March 31, 2016

PHILADELPHIA--(March 31, 2016)--The Chikungunya virus (CHIKV) is transmitted through mosquitoes and causes fever and joint pain that can sometimes become severe and disabling. Outbreaks of the virus have already occurred in Africa, Asia, and Europe, and in late 2013, the virus was first seen in the Americas with the number of cases dramatically increased. No vaccine to prevent or treat this virus currently exists.

Now, new research from The Wistar Institute has demonstrated how a novel vaccine strategy that boosts the immune system by rapidly producing antibodies against CHIKV, combined with a traditional DNA-based vaccine approach, can provide both short term and long term protection against the virus. Study results are published in the Journal of Infectious Diseases.

"Antigen-based vaccination strategies require a lag time that leaves patients susceptible to infection and disease," said David B. Weiner, Ph.D., executive vice-president of The Wistar Institute, director of Wistar's Vaccine Center, W.W. Smith Endowed Chair in Cancer Research, and senior author of the study. "This novel strategy for generating rapid immune protection has the ability to fill this gap in the way vaccines are developed for CHIKV and other emerging and dangerous diseases."

Weiner and colleagues have developed a non-viral, vector-based monoclonal antibody delivery method that they believe has advantages for rapid antibody generation. Normally, monoclonal antibodies are manufactured outside of the body and therefore take time to develop and are very costly. Through genetic enhancement and improved formulations as well as a unique delivery system involving electroporation - a technology where electrical fields are created to make cells more permeable - the vaccine can be delivered directly into cells in a living animal where the monoclonal antibodies designed to fight the disease are directly manufactured and delivered into the blood stream providing rapid immunity.

In this study, when mice infected with CHIKV were given one intramuscular injection of the monoclonal antibody-producing CHIKV vaccine, antibodies against the virus were generated in vivo within 24 hours of administration. The injection neutralized isolated pockets of the virus and protected the mice from viral challenge. Since the virus usually manifests itself within 3-to-7 days of transmission, a rapid response is important for reducing the burden of the disease. When combined with a DNA-based vaccine for CHIKV, the researchers observed both rapid and long-lived protection against the virus.

"The vaccination regimen we tested in this study provided stable, persistent responses against a virus with rapidly increasing global incidence," said Karrupiah Muthumani, Ph.D., assistant professor in the Wistar Institute Vaccine Center and first author of the study. "This new approach will likely have importance for a variety of infectious and non-infectious diseases."
-end-
Co-authors of this study from The Wistar Institute include Seleeke Flingai, Megan Wise, Emma Reuschel, Christopher Chung, and Abirami Muthumani. Other co-authors include Peter Block from the Perelman School of Medicine at the University of Pennsylvania; Nagarajan Muruganantham, Itta Krishna Chaaithanya, and Paluru Vijayachari from the Indian Council of Medical Research; Padma Srikanth from the Sri Ramachandra Medical College and Research Institute; Amir Khan, Niranjan Sardesai, and J. Joseph Kim from Inovio Pharmaceuticals Inc.; and Kenneth Ugen from the University of South Florida Morsani College of Medicine.

The Wistar Institute is an international leader in biomedical research with special expertise in cancer research and vaccine development. Founded in 1892 as the first independent nonprofit biomedical research institute in the country, Wistar has held the prestigious Cancer Center designation from the National Cancer Institute since 1972. The Institute works actively to ensure that research advances move from the laboratory to the clinic as quickly as possible. Wistar's Business Development team is dedicated to advancing Wistar Science Technology Development through creative partnerships. wistar.org.

The Wistar Institute

Related Immune System Articles:

Using the immune system as a defence against cancer
Research published today in the British Journal of Cancer has found that a naturally occurring molecule and a component of the immune system that can successfully target and kill cancer cells, can also encourage immunity against cancer resurgence.
First impressions go a long way in the immune system
An algorithm that predicts the immune response to a pathogen could lead to early diagnosis for such diseases as tuberculosis
Filming how our immune system kill bacteria
To kill bacteria in the blood, our immune system relies on nanomachines that can open deadly holes in their targets.
Putting the break on our immune system's response
Researchers have discovered how a tiny molecule known as miR-132 acts as a 'handbrake' on our immune system -- helping us fight infection.
Decoding the human immune system
For the first time ever, researchers are comprehensively sequencing the human immune system, which is billions of times larger than the human genome.
More Immune System News and Immune System Current Events

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Rethinking Anger
Anger is universal and complex: it can be quiet, festering, justified, vengeful, and destructive. This hour, TED speakers explore the many sides of anger, why we need it, and who's allowed to feel it. Guests include psychologists Ryan Martin and Russell Kolts, writer Soraya Chemaly, former talk radio host Lisa Fritsch, and business professor Dan Moshavi.
Now Playing: Science for the People

#537 Science Journalism, Hold the Hype
Everyone's seen a piece of science getting over-exaggerated in the media. Most people would be quick to blame journalists and big media for getting in wrong. In many cases, you'd be right. But there's other sources of hype in science journalism. and one of them can be found in the humble, and little-known press release. We're talking with Chris Chambers about doing science about science journalism, and where the hype creeps in. Related links: The association between exaggeration in health related science news and academic press releases: retrospective observational study Claims of causality in health news: a randomised trial This...