Targeting lncRNAs by RNAi, ASOs, PNAs, LNAs to knockdown and/or map lncRNAs functional domains. (A) RNA interference (RNAi) recruits the multiprotein RNAi-induced silencing complex (RISC) containing a siRNA (small interfering RNA), shRNA (short hairpin RNA) or esiRNA (endoribonuclease-prepared RNA) to specifically degrade the targeted RNA. (B) Antisense oligonucleotides (ASOs) bind to their targeted RNA, triggering endogenous RNase H1 to cleave the RNA/DNA heteroduplex. (C) Peptide Nucleic Acids (PNAs) and (D) Locked Nucleic Acids (LNAs), hybridize with complementary RNA sequences and affect activity of targeted lncRNAs. This is an original figure.