Navigation Links
Gene site found for children's food allergy
Date:3/7/2010

Pediatrics researchers have identified the first major gene location responsible for a severe, often painful type of food allergy called eosinophilic esophagitis (EoE). In this disease, which may cause weight loss, vomiting, heartburn and swallowing difficulties, a patient may be unable to eat a wide variety of foods.

After performing a genome-wide association study, the study team found EoE was linked to a region of chromosome 5 that includes two genes. The likely culprit is the gene TSLP, which has higher activity levels in children with EoE compared to healthy subjects. In addition, TSLP has been previously linked to allergic inflammatory diseases, such as asthma and the skin inflammation, atopic dermatitis.

"This gene is a plausible candidate because of its biological role in allergic inflammation," said study leader Hakon Hakonarson, M.D., Ph.D., director of the Center for Applied Genomics at The Children's Hospital of Philadelphia. Hakonarson and colleagues collaborated with Marc E. Rothenberg, M.D., Ph.D., director of the Center for Eosinophilic Disorders at the Cincinnati Children's Hospital Medical Center.

The study appears online today in Nature Genetics.

Only recently recognized as a distinct condition, EoE, like other allergies, has been increasing over the past 20 years, and its reported incidence of one in 10,000 people may be an underestimate. The hallmark of EoE is swelling and inflammation in the esophagus, accompanied by high levels of immune cells called eosinophils. It can affect people of any age, but is more common among young men who have a history of other allergic diseases such as asthma and eczema. EoE is often first discovered in children with feeding difficulties and failure to thrive.

In the current study, the researchers performed a genome-wide analysis on 181 samples from the Cincinnati center, compared to nearly 2,000 healthy controls from The Children's Hospital of Philadelphia (CHOP). They then replicated the initial findings with additional DNA samples from EoE patients and controls at CHOP. The gene studies pointed to chromosome 5q22.1, which contains the TSLP gene. TLSP holds the genetic code to produce a cytokine, a specific signaling protein that regulates inflammatory responses occurring in allergic diseases.

Because children with EoE are often allergic to many foods, they may be limited to an elemental formula containing no large food proteins, to allow time for their symptoms to resolve. Physicians then perform tests to determine which foods a child can or cannot eat.

"Eosinophilic esophagitis is a highly allergic disease, and one that is rapidly expanding," said allergist Jonathan M. Spergel, M.D., a co-first author of the study, who sees large numbers of patients with EoE as director of the Center for Pediatric Eosinophilic Disorders at The Children's Hospital of Philadelphia. "This is the first genome-wide association study done on this disease, and now that we have elucidated a gene pathway, the hope is that physicians can eventually intervene in that pathway and discover a new treatment."


'/>"/>

Contact: John Ascenzi
Ascenzi@email.chop.edu
267-426-6055
Children's Hospital of Philadelphia
Source:Eurekalert

Related biology news :

1. University of Chicago and Ataxia Foundation team up for annual scientific and patient meetings
2. Modern man found to be generally monogamous, moderately polygamous
3. Key player found for a cancer typical in Down syndrome
4. Rockefeller Foundation supports expansion, training of e-health work force in developing world
5. Lymphoma Research Foundation announces publication of Mantle Cell report
6. Anorexics found to have excess fat-- in their bone marrow
7. Scripps Research scientists find two compounds that lay the foundation for a new class of AIDS drug
8. Peter Reich, BBVA Foundation Frontiers of Knowledge Award in Ecology
9. Deadly fish virus now found in all Great Lakes
10. Genes found linked to breast cancer drug resistance could guide future treatment choices
11. Damon Runyon Cancer Research Foundation awards prestigious fellowships to 11 top young scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/14/2016)...  xG Technology, Inc. ("xG" or the "Company") (Nasdaq: ... for use in challenging operating environments, announced its results ... will hold a conference call to discuss these results ... (details below). Key Recent Accomplishments ... agreement to acquire Vislink Communication Systems. The purchase is ...
(Date:6/22/2016)... June 22, 2016   Acuant , ... verification solutions, has partnered with RightCrowd ® ... for Visitor Management, Self-Service Kiosks and Continuous ... that add functional enhancements to existing physical ... and venues with an automated ID verification ...
(Date:6/16/2016)... 2016 The global ... reach USD 1.83 billion by 2024, according to ... Technological proliferation and increasing demand in commercial buildings, ... drive the market growth.      (Logo: ... development of advanced multimodal techniques for biometric authentication ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... ... December 08, 2016 , ... ... business of innovation is taking over sports. On Thursday, December 15th a panel ... technology is disrupting the playing field at a Smart Talk session. Smart Talk ...
(Date:12/8/2016)... ... December 08, 2016 , ... The ability ... optogenetics — is key to exciting advances in the study and mapping of ... projected via free-space optics stimulates small, transparent organisms and excites neurons within superficial ...
(Date:12/8/2016)... ... December 08, 2016 , ... KBioBox llc announced today the ... KbioBox developed a sophisticated “3 click” gene dditing off target analysis program and ... website, https://www.kbiobox.com/ and powered by the company’s proprietary BioEngine. Scientists, ...
(Date:12/8/2016)... N.J. , Dec. 8, 2016 Soligenix, ... biopharmaceutical company focused on developing and commercializing products to ... need, announced today that it will be hosting an ... am ET on the origins of innate defense regulators ... a review of oral mucositis and the recently announced ...
Breaking Biology Technology: