Navigation Links
Study: Research reveals protective properties of influenza vaccines
Date:3/25/2013

Collaborating scientists from Nationwide Children's Hospital, Baylor Institute for Immunology Research, and Mount Sinai School of Medicine have identified an important mechanism for stimulating protective immune responses following seasonal influenza vaccinations. The study was published in Science Translational Medicine, a journal of the American Association for the Advancement of Science (AAAS).

While seasonal influenza vaccines protect 60 to 90 percent of healthy adults from "the flu," the mechanisms providing that protection are still not well understood.

The study led by Octavio Ramilo, MD, chief of Infectious Diseases and an investigator in the Center for Vaccines and Immunity at Nationwide Children's Hospital and professor of Pediatrics at The Ohio State University (OSU) College of Medicine, and Hideki Ueno, MD, PhD, an investigator at the Baylor Institute for Immunology Research at Baylor University, demonstrates how certain T cells in the blood are stimulated to provide protective antibody responses with seasonal flu vaccines.

Antibodies are produced by specific white blood cells or B cells, which serve as an immune defense against foreign bodies such as the influenza virus. Helper T cells, another type of white cell, are essential for the generation of B cells.

Blood samples before and after influenza vaccination from three groups of healthy study participants were analyzed for antibody responses. The groups included two sets of adults, one receiving flu vaccines during the 2009-2010 winter and the other receiving vaccination during the 2011-2012 winter. The third group included children receiving the flu vaccine during the 2010-2011 winter.

Analyses show that a temporary increase in a unique subset of helper T cells expressing the co-stimulator molecule ICOS adds to the immune response by helping B cells produce influenza-specific antibodies.

Results indicated that at day seven following the administration of a flu vaccine in all groups, stimulated T cells were evident, contributing to the development of the immune response.

The T cells positively correlated with increased antibodies against each flu virus strain examined, with the exception in the children's group against the swine-origin H1N1 virus.

"Given that seasonal influenza vaccines induce antibody responses mainly through boosting the recall response of the immune system, this lack of correlation might reflect the lack of H1N1 specific immunity in some children," explains study co-author Emilio Flano, PhD, a principal investigator in the Center for Vaccines and Immunity at Nationwide Children's and an associate professor of Pediatrics at OSU College of Medicine.

"This is consistent with the fact that these children had not been vaccinated or naturally exposed to the H1N1 virus prior to being vaccinated during the 2010-2011 winter," said study co-author Santiago Lopez, MD, a postdoctoral research fellow in the Center for Vaccines and Immunity and a resident at Nationwide Children's.

Further experiments demonstrated that this unique subset of helper T cells can boost production of existing antibodies that fight flu by stimulating memory B cells, but do not help production of new antibodies by nave B cells.

"We're gratified that our study provides evidence of one of the essential events associated with the immune response following seasonal influenza vaccination," says Dr. Ramilo. "Understanding these processes is a key step toward developing more effective vaccines."


'/>"/>

Contact: Mary Ellen Peacock
maryellen.peacock@nationwidechildrens.org
614-355-0495
Nationwide Children's Hospital
Source:Eurekalert

Related medicine news :

1. Study: Women not getting enough exercise; at risk of developing metabolic syndrome
2. Study: Insomnia takes toll on tinnitus patients
3. Study: No link between depression, nasal obstruction
4. Study: More Pre-Teens Get Vaccines When Middle Schools Require Them
5. Study: Kids Who Sleep in Parents Bed Less Likely to Be Overweight
6. OHSU study: Misdiagnosis of MS is costing health system millions per year
7. UW study: Sleep apnea associated with higher mortality from cancer
8. Study: Heart damage after chemo linked to stress in cardiac cells
9. STeleR study: Telerehab improves functioning after stroke
10. Study: Willingness to be screened for dementia varies by age but not by sex, race or income
11. Study: 21 percent of newly admitted nursing home residents sustain a fall during their stay
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2017)... Braunfels, TX (PRWEB) , ... March 23, 2017 , ... ... new clinic, located at 960 Gruene Road in Building 2. The clinic is the ... Dr. Andrew Bennett, PT, says opening the company’s second New Braunfels location brings things ...
(Date:3/23/2017)... PA and Grimsby, Ontario (PRWEB) , ... March 23, 2017 , ... The MBI “Hall ... modular industry or whose acts have had a significant impact on the careers of all ... and Marketing with NRB Inc. was inducted into the MBI’s Hall of Fame. The ...
(Date:3/23/2017)... Austin, TX (PRWEB) , ... March 23, 2017 , ... ... fist-sized organs that pack a punch when it comes to maintaining good health. Every ... every 30 minutes, your kidneys filter every drop of your blood, eliminating waste, regulating ...
(Date:3/23/2017)... Angeles, CA (PRWEB) , ... March 23, 2017 ... ... A funding investment in Los Angeles based healthcare technology company California Healthcom Group ... portfolio into the US, and healthcare arena. With headquarters in California, CHG is ...
(Date:3/23/2017)... ... March 23, 2017 , ... Michael Lanteri ... the greater Fort Collins area, has unveiled a collaboration with nonprofit Big Bones ... Donations to this worthy cause may now be made at http://bigbonescaninerescue.com/ . ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... INDIANAPOLIS , March 23, 2017  Eli ... the William Sansum Diabetes Center have established a research ... by diabetes through enhanced research, education and care. ... disease bears a disproportionate weight on Latino families in ... David Kerr , M.D., FRCPE, director of Innovation and ...
(Date:3/23/2017)... DIEGO and VANCOUVER, British Columbia ... (NASDAQ: SPHS ) (the "Company" or "Sophiris"), ... the treatment of urological diseases, today announced that data ... evaluated the drug as a focal treatment for localized ... March 26, 2017 at the 32 nd Annual ...
(Date:3/23/2017)...  Interpace Diagnostics Group, Inc. (NASDAQ: ... company that provides clinically useful molecular diagnostic tests ... entered into agreements to successfully restructure its secured ... concurrently terminate its royalty and milestone obligations. ... RedPath amounting to $9.34 million is being acquired ...
Breaking Medicine Technology: