Notably, TSLP concentrations within sputum have been correlated with the magnitude of airway hyperresponsiveness (AHR) in asthmatic patients, regardless of eosinophil count, thereby affirming the significance of AHR and TSLP as indicants of the malady that warrant further investigation in both eosinophil-rich and eosinophil-poor asthma subsets (97). This evidence concerns the gene TSLP and asthma.