Navigation Links
A large subgroup of mild-to-moderate asthma is persistently non-eosinophilic
Date:1/5/2012

A large percentage of patients with mild-to-moderate asthma have persistently non-eosinophilic disease which may not respond to currently available anti-inflammatory treatments, according to a new study.

In a cross-sectional study of 995 asthmatic subjects enrolled in nine clinical trials conducted by the NHLBI's Asthma Clinical Research Network, sputum eosinophilia (≥2% eosinophils) was found in only 36% of asthmatics not using an inhaled corticosteroid (ICS) and 17% of those using an ICS. Among patients who achieved good asthma control, 26% had sputum eosinophilia, compared with 15% among patients who had not achieved good control.

The findings were published online ahead of print publication in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

Among asthmatic subjects not taking an ICS who had repeated induced sputum samples, 22% had sputum eosinophilia on every occasion (persistent eosinophilia), 31% had eosinophilia on at least one occasion (intermittent eosinophilia), and 47% had no eosinophilia on every occasion (persistently non-eosinophilic). Two weeks of treatment with a combination of anti-inflammatory drugs resulted in significant improvements in airflow obstruction in subjects with eosinophilic asthma, but not in those with persistently non- eosinophilic asthma. Bronchodilator responses to albuterol, however, were similar in eosinophilic and non-eosinophilic asthma.

"Prevalence estimates for non-eosinophilic asthma in earlier studies were based on single sputum samples," said John Fahy, MD, MSc, professor of medicine and director of the Cardiovascular Research Institute/University of California San Francisco Airway Clinical Research Center. "Here we show for the first time that sputum eosinophilia is persistently absent in a large percentage of patients with mild/moderate asthma when sputum is analyzed repeatedly over time."

The poor response to intense combined treatment seen in patients with persistently non-eosinophilic asthma suggests that these patients have a unique disease phenotype for which new treatments need to be developed. Treatment responses in patients with intermittent eosinophilia were similar to those of patients with persistent eosinophilia.

"A large subgroup of patients with mild-to-moderate asthma do not have the usual eosinophilic subtype that is responsive to steroid treatment," concluded Dr. Fahy. "In addition to the implications for the care of these patients, our results have important implications for future asthma research. In clinical studies, the eosinophil phenotype of patients should be characterized to better understand treatment responses and disease mechanisms. In addition, appropriate in vitro and animal models for the study of the mechanisms of non-eosinophilic airway disease need to be developed."


'/>"/>
Contact: Nathaniel Dunford
ndunford@thoracic.org
212-315-8620
American Thoracic Society
Source:Eurekalert

Related medicine news :

1. New evidence that bacteria in large intestine have a role in obesity
2. NDAR federation creates largest source of autism research data to date
3. Nations largest federation of biological and biomedical organizations welcomes 2 new members
4. Spains digital gender gap is larger than European average
5. Save the date: National meeting of the worlds largest scientific society
6. Food served in childrens hospitals rated largely unhealthy
7. Study Finds Link Between Low IQ, Large Waistline
8. Large-scale jaw pain study sheds light on pain disorders
9. First large-scale study of pain reveals risk factors
10. Steps being taken towards achieving an early diagnosis of cancer of the large intestine
11. Larger Food Portions May Be Seen as Status Symbols
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/20/2017)... ... , ... “The Land of More and More”: a brilliant story for ... shares the simple and achievable answer. “The Land of More and More” is the ... Church in Angola, Indiana where he works with the children’s ministry department. , ...
(Date:1/19/2017)... ... ... Next week after January 20th, the fear for many is that the ... needs of over 30 million. Many interviews with Dr. Carol Francis at the Los ... were suppose to prioritize. Interviews provided below. , Among those present was ...
(Date:1/19/2017)... ... January 19, 2017 , ... ... innovators, engineers, and scientists from around the world, announces the launch of its ... quick and easy portal to research breakthroughs and trending news, vital information on ...
(Date:1/19/2017)... Park City, Utah (PRWEB) , ... January 19, ... ... Sundance Film Festival in a medical capacity this year. Drs. Alexander Paziotopoulos, Andrew ... Lounge to provide a condensed version of the clinic’s leading recovery program. ...
(Date:1/19/2017)... , ... January 19, 2017 , ... ... Conductor CTMS, which provides a modern CTMS workflow designed to seamlessly integrate and ... has been condensed to a single page, maximizing usability and improving efficiency significantly ...
Breaking Medicine News(10 mins):
(Date:1/19/2017)... 2017 This report on the opioid induced ... of the global market. Large number of chronic pain ... constipation is a major side effect of consumption of ... targeted therapy has been prescribed to treat opioid induced ... medicines, and growing awareness about the therapy are the ...
(Date:1/19/2017)... -- Accuray Incorporated (Nasdaq: ARAY ) announced ... set the bar for excellence in customer satisfaction. The ... rating among radiation treatment delivery systems in the U.S., ... Briefing™. The most recent ratings trend also shows Accuray ... for 11 of the past 12 quarters. ...
(Date:1/19/2017)... Shire plc (LSE: SHP, NASDAQ: ... and Drug Administration (FDA) has acknowledged receipt of the ... for SHP465, a long-acting, triple-bead, mixed amphetamine salts formulation. ... for Attention-Deficit/Hyperactivity Disorder (ADHD). The FDA is expected to ... the designated Prescription Drug User Fee Act (PDUFA) action ...
Breaking Medicine Technology: