IL13 and asthma: The let‐7 family miRNAs have been shown to directly target IL13 and thus inhibit IL13 transcription both in animal models and in human cells in vitro26, 27 Validation of four let‐7 miRNA candidates in additional samples from our cohort confirmed the tendency for increased expression of let‐7f, let‐7g and miR‐98 in males with asthma compared with females with asthma.