Introduction of miR-1/206 in RD cells suppresses tumor growth in nude mice. A, mice were inoculated with lentivirus-infected RD cells expressing miR-1, miR-206, or NC. Representative photographs of nude mice 8 weeks after inoculation are shown. B, average volume of tumors derived from RD cells infected with NC or miR-1/206 in nude mice. *, differences in tumor volume between miR-1/206 and NC infected cells were significant, n = 6 each, p < 0.01. Error bars indicate S.E.