Showing posts with label asthma. Show all posts
Showing posts with label asthma. Show all posts

Friday, April 26, 2013

Steroids to treat asthma: How safe are they?

Children experiencing an asthma attack who are treated with a short burst of oral steroids may have a brief and transient depression of immune response according to a new study led by Université de Montréal. These findings, published in this month's issue of Pediatric Allergy, Immunology and Pulmonology, have implications for asthmatic children who have flare-ups and who may be exposed to new contagious diseases.

“There is no question that the administration of steroids reduces the risk and duration of hospital admission in children with acute asthma and remains the most effective treatment for moderate and severe asthma exacerbations,” says first author Francine M. Ducharme, a Université de Montréal professor and paediatrician and researcher at the Sainte-Justine University Hospital Research Center. “However, the safety profile of these medications continues to raise concerns among parents and physicians. Concerns over their possible impact on the immune system stem from few rare reports linking or severe chickenpox infections linked with corticosteroid administration.”

Reduced immune response to new triggers
Ducharme and colleagues evaluated the immune response of children aged 3 to 17 years, who had arrived at the emergency department (ED) with an asthma attack. All subjects were given immune triggers (known as antigens) and the immune response between those who received corticosteroids versus those who did not were compared.

“Several corticosteroid-treated children had a lower immune response, as measured by the amount of antibody produced, than non-treated kids,” says Ducharme.

Friday, March 1, 2013

Oral Contraceptives & Age of Menarche Affect The Risk of Asthma


Oral contraceptives and age of menarche affect the risk of asthma


Endogenous and exogenous sex hormones allegedly linked to the development of asthma and respiratory asthma-like disorders in young women, according to a team of researchers in the May issue of the Journal of Allergy and Clinical Immunology.

In the study, 905 were studied menstruating women aged 13 to 28 years old.

It was found that women with the appearance of menarche to 12 years, the risk of asthma after puberty was 2.08 times higher than in patients with the start of menarche at age 12 years.

Use of oral contraceptives is also correlated with an increase in the probability of occurrence of 1.75 in patients without a history of asthma, wheezing. It is not clear how the change in the level of sex hormones increases the risk of developing asthma. Perhaps this is due to unaccounted lifestyle factors, or is due to decrease in the content of physiological levels of estrogen and progesterone during phases of each menstrual cycle.

Data of previous large studies of postmenopausal women showed that hormone replacement therapy increases the risk of developing asthma. Oral contraceptives with higher doses of estrogen and progesterone can have a pronounced effect on asthma or asthma-like respiratory disorders.

However, the researchers argue that a combination of asthma and oral contraceptives have no contraindications.