Navigation Links
Researchers Discover Gene That Determines Asthma Susceptibility By Regulating Inflammation

Disruption of a single gene, Nrf2, plays a critical role in determining the susceptibility to asthma. A research team led by Shyam Biswal, PhD, at the Johns Hopkins Bloomberg School of Public Health found the absence of Nrf2 exacerbated allergen-mediated asthma in mice models. The study’s findings, published in the July 4, 2005, edition of the Journal of Experimental Medicine, may hold therapeutic potential for the treatment of human asthma.

Asthma is a complex inflammatory disease of the airway characterized by airway inflammation and hyperreactivity. The incidence of asthma has doubled in the past two decades in the United States, affecting 20 million Americans. Controlling inflammation is a focus of asthma therapy. Inflammation occurs when certain cells migrate into the airways. These “inflammatory?cells release reactive oxygen species (ROS), causing the airway lining to swell and restrict. ROS is thought to cause lung tissue damage as well. ROS levels are normally offset by antioxidants in non-asthmatics. Recently, researchers have been hunting for novel genes that regulate inflammation with the hope of developing them as targets for the next generation of asthma drugs.

Suspecting that a defect in antioxidant response exacerbates asthma severity, the team of researchers began looking into the genetic factors that might contribute to this deficiency. In 2002, Biswal’s lab discovered Nrf2 acts as a master regulator of the majority of antioxidant pathways and detoxifying enzymes for environmental pollutants. This led researchers to consider the role of Nrf2 in lung inflammatory diseases caused by exposure to allergens. They found that the absence of the Nrf2 gene increased migration of inflammatory cells into the airways and caused an enhanced asthmatic response in mice. “Nrf2 is critical for proper response to allergens in lungs and maintenance of a balance between ROS production. Antioxidant capability regulated by Nrf2 may be a major determinant o f susceptibility to allergen-mediated asthma,?says Biswal. “Nrf2 regulated pathways seem to intervene inflammation at several points.?/p>

The findings provide a better understanding of the human body’s defense mechanisms to stress, which may hold clues to better control the inflammation process and improve control over asthma and its symptoms. Study coauthor Tirumalai Rangasamy, PhD said that the next step for researchers will be to look for molecular mechanism of regulation of asthmatic inflammation by Nrf2 and determine if there are alterations in the response of Nrf2 gene in asthma-prone humans. Future studies will determine the therapeutic potential of targeting Nrf2 for treatment of asthma.

“Disruption of Nrf2 enhances susceptibility to severe airway inflammation and asthma in mice?was written by Tirumalai Rangasamy, Jia Guo, Wayne A. Mitzner, Jessica Roman, Anju Singh, Allison D. Fryer, Masayuki Yamamoto, Thomas W. Kensler, Rubin M. Tuder, Steve N. Georas and Shyam Biswal.

The study was supported by grants from the National Institutes of Health, the National Institute of Environmental Health Sciences, the Maryland Cigarette Restitution Fund, the Flight Attendant Research Institute and the Thomas and Carol McCann Innovative Research Fund for Asthma and Respiratory Disease.


'"/>

Source:Johns Hopkins University Bloomberg School Of Public Health


Related biology news :

1. Researchers discover way to make cells in the eye sensitive to light
2. Researchers find how protein allows insects to detect and respond to pheromones
3. Researchers Uncover Key Step In Manufacture of Memory Protein
4. Researchers reveal the infectious impact of salmon farms on wild salmon
5. Researchers identify target for cancer drugs
6. Researchers discover molecule that causes secondary stroke
7. Researchers find missing genes of ancient organism
8. Researchers trace evolution to relatively simple genetic changes
9. Researchers add new tool to tumor-treatment arsenal
10. UF Researchers Map Bacterial Proteins That Cause Tooth Loss
11. VCU Researchers Identify Networks Of Genes Responding To Alcohol In The Brain
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/26/2016)... , April 27, 2016 ... the  "Global Multi-modal Biometrics Market 2016-2020"  report to ... ) , The analysts forecast the ... CAGR of 15.49% during the period 2016-2020.  ... number of sectors such as the healthcare, BFSI, ...
(Date:4/15/2016)... , April 15, 2016  A new partnership ... more accurate underwriting decisions in a fraction of ... competitively priced and high-value life insurance policies to ... With Force Diagnostics, rapid testing (A1C, ... data readings (blood pressure, weight, pulse, BMI, and ...
(Date:4/14/2016)... 14, 2016 BioCatch ™, ... today announced the appointment of Eyal Goldwerger ... Goldwerger,s leadership appointment comes at a time ... the deployment of its platform at several of the ... which discerns unique cognitive and physiological factors, is a ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... In a new case report ... detail how a patient who developed lymphedema after being treated for breast cancer benefitted ... change the paradigm for dealing with this debilitating, frequent side effect of cancer treatment. ...
(Date:6/23/2016)... , June 23, 2016 ... Hematology Review, 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 ... , the peer-reviewed journal from touchONCOLOGY, Andrew ... escalating cost of cancer care is placing an ... result of expensive biologic therapies. With the patents ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... quality, regulatory and technical consulting, provides a free webinar on Performing ... July 13, 2016 at 12pm CT at no charge. , Incomplete investigations are ...
(Date:6/23/2016)... ReportsnReports.com adds 2016 global ... pharmaceuticals section with historic and forecast data along ... Complete report on the Cell Culture ... companies and supported with 261 tables and figures ... The Global Cell Culture Media Industry ...
Breaking Biology Technology: