Previous study reported that the
let-7 family members, miR-84, miR-48, and miR-241, were expressed in a similar manner as the
let-7 RNA, which was first detected during the L3 stage. However, this paper reveal that miR-241 and miR-48 both appeared one stage earlier than
let-7 at eL2 with robust expression by L3. miR-84 appeared at low levels in the early L1 stage, was upregulated to an intermediate level in mid-L2, and had a high level of expression in early L4.