Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sun protects against childhood asthma

19.05.2011
Vitamin D, which is primarily absorbed from the sun, plays a role in protection against childhood asthma.

Now, a new study led by Valencian researchers has shown that children who live in colder, wetter cities are at greater risk of suffering from this respiratory problem, since there are fewer hours of sunlight in such places.

"Prolonged exposure to the sun can cause cancer, but it's also dangerous to avoid it. There has to be a balance between the pros and cons", Alberto Arnedo-Pena, an epidemiologist at the Public Health Centre in Castellón and lead author of the research, which is part of the International Study of Asthma and Allergies in Childhood (ISAAC), led by Luis García Marcos of the University of Murcia, tells SINC.

In fact, 90% of our vitamin D is synthesised through exposure to the sun. This vitamin, which can be found in various cell receptors, is usually found at lower levels in people with asthma. The study results show that there is a higher prevalence of this illness among children in wetter places with less sun (northern Spain).

The research, carried out on more than 45,000 children and teenagers from nine Spanish cities and published in the International Journal of Biometeorology, shows that climatic conditions, above all solar radiation, can in many cases explain the high geographical variation in the prevalence of asthma in Spain.

"Although we need more studies on this issue – this hypothesis is not even five years old - it is clear that an average level of sun exposure is important for the assimilation of vitamin D, a compound that is extremely important in preventing illnesses such as asthma, tuberculosis and other infectious diseases", stresses Arnedo-Pena.

The solar vitamin

In northern countries (where there are fewer hours of sunshine than in the Mediterranean), the advice is to spend 20 to 30 minutes' in the sun each day, although not at times within the highest risk period (from noon to 4pm). For now, no similar advice exists in Spain.

Once the benefits of sun exposure are understood, it can be seen that there is a problem in countries at latitudes higher than 40º north, where it is not possible to absorb enough vitamin D during the winter months. "People in these countries should take supplements to ensure they are not at risk", the researcher concludes.

References:

Alberto Arnedo-Pena; Luis García-Marcos; Jorge Fuertes Fernández-Espinar; Alberto Bercedo-Sanz; Inés Aguinaga-Ontoso; Carlos González-Díaz; Ignacio Carvajal-Urueña; Rosa Busquet-Monge; Maria Morales Suárez-Varela; Nagore García de Andoin; Juan Batlles-Garrido; Alfredo Blanco-Quirós; Angel López-Silvarrey Varela; Gloria García-Hernández. "Sunny hours and variations in the prevalence of asthma in schoolchildren according to the International Study of Asthma and Allergies (ISAAC) Phase III in Spain". Int J Biometeorol (2011) 55:423-434.

SINC Team | EurekAlert!
Further information:
http://www.plataformasinc.es

More articles from Studies and Analyses:

nachricht Real-time feedback helps save energy and water
08.02.2017 | Otto-Friedrich-Universität Bamberg

nachricht The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

From rocks in Colorado, evidence of a 'chaotic solar system'

23.02.2017 | Physics and Astronomy

'Quartz' crystals at the Earth's core power its magnetic field

23.02.2017 | Earth Sciences

Antimicrobial substances identified in Komodo dragon blood

23.02.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>