Asthma-Related Traits 2, also known as asthma-related traits, susceptibility to, 2, is related to asthma and neurodegeneration with brain iron accumulation 2a. An important gene associated with Asthma-Related Traits 2 is NPSR1 (Neuropeptide S Receptor 1). The drugs glucocorticoids and Respiratory System Agents have been mentioned in the context of this disorder. Affiliated tissues include lung and trachea.