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 Disarray in the brain
18.12.2017 | Universität zu Lübeck

nachricht Amputees can learn to control a robotic arm with their minds
28.11.2017 | University of Chicago Medical Center

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: Error-free into the Quantum Computer Age

A study carried out by an international team of researchers and published in the journal Physical Review X shows that ion-trap technologies available today are suitable for building large-scale quantum computers. The scientists introduce trapped-ion quantum error correction protocols that detect and correct processing errors.

In order to reach their full potential, today’s quantum computer prototypes have to meet specific criteria: First, they have to be made bigger, which means...

Im Focus: Search for planets with Carmenes successful

German and Spanish researchers plan, build and use modern spectrograph

Since 2016, German and Spanish researchers, among them scientists from the University of Göttingen, have been hunting for exoplanets with the “Carmenes”...

Im Focus: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Single-photon detector can count to 4

18.12.2017 | Information Technology

Quantum memory with record-breaking capacity based on laser-cooled atoms

18.12.2017 | Physics and Astronomy

How much soil goes down the drain -- New data on soil lost due to water

18.12.2017 | Agricultural and Forestry Science

VideoLinks
B2B-VideoLinks
More VideoLinks >>>