New light shed on cause of lung injury in severe flu
While some scientists report engineering a super virulent strain of the H5N1 influenza virus, which could potentially wipe out a significant percentage of the human population, another group of researchers from the United Kingdom now reports a discovery that may one day help mitigate the deadly effects of all flu strains. This report, appearing in the March 2012 print issue of the Journal of Leukocyte Biology, describes findings that may help prevent deaths from severe flu outbreaks, especially from seemingly healthy young people. Specifically, the researchers found that immune cells called, "natural killer T cells," may reduce the overwhelming numbers of another type of immune cell, called "inflammatory monocytes," which when present in large numbers, lead to lung injury at the end stage of severe flu infection.
"We hope this study will ultimately benefit individualsespecially the youngwho succumb to a severe form of flu infection," said Ling-Pei Ho, M.D., Ph.D., the researcher who led the work from the MRC Human Immunology Unit, Oxford University in Oxford, United Kingdom. "The study highlights a key immune process that occurs in severe flu infection, and provides a platform for a new approach and further research in this area."
To make their discovery, scientists infected three groups of mice with H1N1 flu virus. (Note: this is NOT the H5N1 flu virus that has been at the center of recent controversy.) The first group included normal mice; the second group was devoid of natural killer T cells, and the third was given a treatment that specifically activated natural killer T cells. Researchers observed the outcome of flu infection and found that the mice without natural killer T cells did worst, and those with activated killer T cells did best. Mice that lacked natural killer T cells had increased amounts of monocytes in the lungs, and severe lung injury similar to those seen in Spanish flu and lethal swine flu. Using highly-sensitive fluorescent antibody technology, this study was one of the first to document the sequential changes in innate immune response in the lungs during severe flu infection. These findings essentially provide a "road map" of the chronological changes in the lungs during severe flu infection.
"Despite affecting practically everyone, the flu may be one of the most underestimated viruses in terms of its devastating potential," said John Wherry, Ph.D., Deputy Editor of the Journal of Leukocyte Biology. "As the H5N1 research shows, it is quite possible for the virus to mutate or be bioengineered into a form that could wipe most of us out. What most people don't realize is that the severe illness from these flu strains is caused by both the virus and an overaggressive or inappropriate immune response. Research like this, however, offers hope that we'll be able to find more universal ways improve the effectiveness of immunity and combat the severe strains of the flu."
Journal reference: Journal of Leukocyte Biology
- Drug to fight tumors also fights the flu and possibly other viruses Feb 28, 2011 | not rated yet | 0
- Human vaccine against bird flu a reality with new discovery Mar 02, 2009 | not rated yet | 0
- Vaccine protects mice from 1918 flu virus Oct 17, 2006 | not rated yet | 0
- The host makes all the difference Mar 26, 2009 | not rated yet | 0
- 2009 H1N1 pandemic flu more damaging to lungs, opens opportunities for bacterial infection Sep 19, 2011 | not rated yet | 0
- Motion perception revisited: High Phi effect challenges established motion perception assumptions Apr 23, 2013 | 3 / 5 (2) | 2
- Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update) Apr 02, 2013 | 4.5 / 5 (11) | 5
- The visual system as economist: Neural resource allocation in visual adaptation Mar 30, 2013 | 5 / 5 (2) | 9
- Separate lives: Neuronal and organismal lifespans decoupled Mar 27, 2013 | 4.9 / 5 (8) | 0
- Sizing things up: The evolutionary neurobiology of scale invariance Feb 28, 2013 | 4.8 / 5 (10) | 14
Classical and Quantum Mechanics via Lie algebras
Apr 15, 2011 I'd like to open a discussion thread for version 2 of the draft of my book ''Classical and Quantum Mechanics via Lie algebras'', available online at http://lanl.arxiv.org/abs/0810.1019 , and for the...
- More from Physics Forums - Independent Research
More news stories
There are significant cost and risk factors associated with two procedures commonly used to diagnose or treat gastrointestinal problems, according to research presented at Digestive Disease Week (DDW).
Diseases, Conditions, Syndromes 7 hours ago | not rated yet | 0
Regular consumption of coffee is associated with a reduced risk of primary sclerosing cholangitis (PSC), an autoimmune liver disease, Mayo Clinic research shows. The findings were being presented at the Digestive Disease ...
Diseases, Conditions, Syndromes 8 hours ago | not rated yet | 0 |
A new case of the deadly coronavirus has been detected in Saudi Arabia where 15 people have already died after contracting it, the health ministry announced on Saturday on its Internet website.
Diseases, Conditions, Syndromes 20 hours ago | not rated yet | 0
(HealthDay)—Few randomized clinical trials have been done to assess clinical prediction rules for patients with lower back pain, and the trials that have been done are of low quality and do not provide ...
Diseases, Conditions, Syndromes May 17, 2013 | not rated yet | 0 |
A new, highly sensitive blood test that quickly detects even the lowest levels of malaria parasites in the body could make a dramatic difference in efforts to tackle the disease in the UK and across the world, according to ...
Diseases, Conditions, Syndromes May 17, 2013 | not rated yet | 0
The hunt for an HIV vaccine has gobbled up $8 billion in the past decade, and the failure of the most recent efficacy trial has delivered yet another setback to 26 years of efforts.
32 minutes ago | not rated yet | 0
Patients with treatment-resistant major depression saw dramatic improvement in their illness after treatment with ketamine, an anesthetic, according to the largest ketamine clinical trial to-date led by researchers from the ...
8 hours ago | 4.5 / 5 (2) | 0 |
Research presented at Digestive Disease Week (DDW) explores new methods for managing digestive health through diet and lifestyle.
8 hours ago | not rated yet | 0
The use of a smartphone application significantly improves patients' preparation for a colonoscopy, according to new research presented today at Digestive Disease Week (DDW). The preparation process, which begins days in ...
7 hours ago | not rated yet | 0
An increasing number of U.S. children are experiencing gastrointestinal issues that require interventions to resolve, according to research presented at Digestive Disease Week (DDW).
22 hours ago | not rated yet | 0 |