Navigation Links
Experimental Flu Vaccine Appears Promising in Early Tests

An influenza vaccine produced with the use of insect cells appeared safe and produced an immunogenic response// in healthy adults. The new research promises to be an alternative to using embryonated eggs for the development of influenza vaccine, according to a preliminary study.

"All currently licensed influenza vaccines in the United States are produced in embryonated hen's eggs. There are several well-recognized disadvantages to the use of eggs as the substrate [the base on which an organism lives or grows] for influenza vaccine. Eggs require specialized manufacturing facilities and could be difficult to scale up rapidly in response to an emerging need such as a pandemic," the authors write. They add that development of alternative substrates for influenza vaccine production has been identified as a high-priority. One potential alternative is use of the influenza virus hemagglutinin (HA; an antibody that causes red blood cells to clump together) using recombinant (genetic recombination) DNA techniques.

John J. Treanor, M.D., of the University of Rochester, N.Y., and colleagues evaluated an experimental influenza vaccine consisting of recombinant HA expressed in insect cells by a recombinant baculovirus (rHA0). The clinical trial was conducted at three U.S. academic medical centers during the 2004-2005 influenza season and included 460 healthy adults. Participants were randomly assigned to receive a single injection of saline placebo (n = 154); 75 μg of an rHA0 vaccine containing 15 μg of hemagglutinin from influenza A/New Caledonia/20/99(H1N1) and influenza B/Jiangsu/10/03 virus and 45 μg of hemagglutinin from influenza A/Wyoming/3/03 (H3N2) virus (n = 153); or 135 μg of rHA0 containing 45 μg of hemagglutinin each from all 3 components (n = 153). Serum samples were taken before and 30 days following immunization.

The researchers found: "We have shown that the rHA0 vaccine is well tolerated in healthy adults and immunogenic at both doses evaluated, and we obtained preliminary evidence of protection against influenza infection and disease. The safety data generated in this study are consistent with the safety profile observed in previous studies of rHA0 vaccine. These vaccines have been well tolerated at all doses administered and are associated with low rates of local reactions."

"The use of recombinant DNA techniques to express proteins in cell culture has been a successful approach for generation of highly effective vaccines for the prevention of hepatitis B virus and human papillomavirus. Among the available expression technologies, recombinant baculovirus is especially well suited for production of influenza vaccine because the rapidity with which genes can be cloned and inserted into this vector facilitates updating the vaccine at regular intervals. In addition, the extraordinarily high yields of protein possible in this system provide the opportunity to use much higher and potentially more effective doses of vaccine. Expression of the HA protein in insect cells using recombinant baculovirus also avoids the need to work with potentially pathogenic live influenza viruses and the attendant biocontainment issues that would be a particular concern for generation of pandemic vaccines. The preliminary demonstration of protective efficacy in adults provides further support for the development of this promising approach for prevention of seasonal and pandemic influenza," the authors conclude.


Related medicine news :

1. Experimental treatment for Ebola Virus Shows promising results in mice
2. Experimental drug to fight flu
3. Experimental SARS Vaccine
4. Experimental vaccine for shingles is effective
5. Experimental Blood Test May Spot Heart Attack Risk, Study Says
6. Five AIDS Patients To Receive Experimental Anti-retroviral Drugs
7. Protection against HIV and Herpes is possible with the Experimental Microbicide
8. Experimental Therapy Effective Against Malignant Melanoma in Horses
9. Experimental Alzheimer’s Drug curbs the disease in mic
10. New Guidelines to Be Laid While Testing Experimental Drugs
11. Experimental Drug Deals Effectively with Prostate Cancer Cells
Post Your Comments:

(Date:11/25/2015)... ... November 25, 2015 , ... The holiday season is ... pleasing the palates of attendees is of the utmost importance. Whether you are ... get-together, give these recipes a try this holiday season. , Turkey Croquettes , ...
(Date:11/25/2015)... ... November 25, 2015 , ... ... factory direct sauna parts and accessories. , Sauna accessories help improve the bather ... style and personality. From basic styles for the purist looking for simplicity in ...
(Date:11/25/2015)... ... 2015 , ... On November 10, 2015, Bohrer Brady, LLC filed a class ... of a home health care worker who provided companionship services for the elderly, ill ... employed by Humana, Inc., Humana at Home, Inc., and SeniorBridge Family Companies (CT), Inc. ...
(Date:11/25/2015)... Jacksonville, FL (PRWEB) , ... November 25, 2015 ... ... treatment center, is encouraging people across the country to celebrate their sobriety and ... invites people to post “before and after” photos this Thanksgiving with the hashtag ...
(Date:11/25/2015)... ... November 25, 2015 , ... ... and athletic programs, launches new Wimbledon Athletics Facebook page to educate ... athletes for unsuspected cardiac abnormalities. About 2,000 people under the age of 25 ...
Breaking Medicine News(10 mins):
(Date:11/25/2015)... -- On Tuesday, November 24, 2015, the jury ... Medical Technology, Inc. for product liability and misrepresentation ... device, awarded $11 million in favor of Plaintiff ... three days of deliberations, the jury found that ... and unreasonably dangerous, and that Wright Medical made ...
(Date:11/25/2015)... SAN DIEGO , Nov. 25, 2015  Trovagene, ... molecular diagnostics, today announced that Chief Executive Officer Antonius ... at the 27 th Annual Piper Jaffray Healthcare ... Conference at the New York Palace Hotel in ... 2015 at 1:30 p.m. EST. Mr. Schuh will be ...
(Date:11/25/2015)... 25, 2015 --> ... glucose devices was valued at $11,171.1 million in 2014, ... of 5.7% during 2015 - 2022. The global market ... prevalence of diabetes. In addition, the increase in obese ... contributing to the growth of the market. Furthermore, technological ...
Breaking Medicine Technology: