VHL and asthma: We screened the output of prediction algorithms (http://www.microrna.org/) to determine whether miRNAs could regulate VHL expression and according to Prescott’s [23] report about the miRNAs change in airway epithelium of asthma patient, four miRNAs (miR-20, miR-141, miR-200 and miR-223) may target VHL.