This new volume of the book series Epigenetics and Human Health is dedicated to microRNAs (miRNAS), regulatory non-coding RNAs that have important roles in the control of gene expression both at posttranscriptional and transcriptional levels. Endogenous miRNAs regulate gene expression patterns in a sequence-specific manner. These short sequences may serve as potential therapeutic targets in the treatment of complex diseases including cancer, cardiovascular diseases, neurocognitive disorders, respiratory diseases and pathogenic infections. Moreover, miRNAs hold promise to be used as extensive diagnostic and prognostic markers of disease. miRNAs, Human Health and Disease is an essential reading for graduate and undergraduate students, researchers, and academics interested in the latest developments on non-coding RNA-mediated pathways associated with health and disease.