Summary of cellular miRNAs effect on hepatitis B virus and hepatitis C virus replication. A: The miRNAs which regulate hepatitis B virus (HBV) replication through targeting transcription factors known for HBV transcription, regulating immune, and direct targeting viral transcripts were indicated; B: The miRNAs which regulate hepatitis C virus (HCV) replication through targeting entry, translation, replication, envelopment, and regulating immune were indicated.