TRPA1 and allergic asthma: In the ovalbumin model of allergic asthma, TRPA1 has been reported to promote the release of inflammatory factors [25–29], mediate peripheral blood eosinophilia [27, 29], increase leukocyte influx to the lungs [22, 25, 27–29] and to increase airway hyperreactivity [25, 26, 28, 29].