Activation of certain signal molecules inside the lung cells may participate in the development of asthma and the response to allergens. Blocking these signal molecules specifically with medicines might therefore be beneficial in the treatment of asthma. In this study we want to test a new medicine that specifically targets a subset of signal molecules that are associated with the allergen response in the lung. In particular, we want to test this medicine on cells obtained from the lungs of asthma patients. Understanding the effects of this new medicine on these asthmatic lung cells will give vital information on how this new medicine works before we can test it in asthma patients.