Messios Christodoulos, Koutsoulidou Andrie, Phylactou Leonidas A
Department of Molecular Genetics, Function & Therapy, The Cyprus Institute of Neurology and Genetics, 2371 Nicosia, Cyprus.
Mol Ther Methods Clin Dev. 2025 May 19;33(2):101488. doi: 10.1016/j.omtm.2025.101488. eCollection 2025 Jun 12.
Muscles, traditionally recognized for their role in locomotion and breathing, also participate in tissue communication. Extracellular microRNAs (miRNA) have been identified as key players in intercellular and inter-organ communication in muscle and other tissues. We have previously shown that intramuscular administration of an antagomiR led to the repression of target miRNA in neighboring skeletal muscles. This study investigated whether antagomiRs could be delivered to distant muscle and other tissues following intramuscular administration. We designed antagomiRs targeting a muscle-specific miRNA, miR-133b; a ubiquitously expressed miRNA, miR-16; and a scrambled oligonucleotide. Although all sequences were detected in neighboring skeletal muscles and distant tissues following intramuscular administration, antagomiR-133b showed the highest accumulation and efficacy in various tissues. This is the first study to provide evidence that intramuscular administration of antagomiRs could be utilized to achieve efficient and widespread distribution in tissues. This in turn could form the basis for alternative future therapeutic approaches.
肌肉传统上被认为在运动和呼吸中发挥作用,它也参与组织间通讯。细胞外微小核糖核酸(miRNA)已被确定为肌肉和其他组织中细胞间和器官间通讯的关键参与者。我们之前已经表明,肌肉内注射抗miR可导致邻近骨骼肌中靶miRNA的抑制。本研究调查了肌肉内注射后抗miR是否能传递至远处的肌肉和其他组织。我们设计了靶向肌肉特异性miRNA miR-133b、普遍表达的miRNA miR-16的抗miR以及一段乱序寡核苷酸。尽管肌肉内注射后在邻近骨骼肌和远处组织中均检测到所有序列,但抗miR-133b在各种组织中显示出最高的积累量和效果。这是第一项提供证据表明肌肉内注射抗miR可用于在组织中实现高效且广泛分布的研究。这反过来可为未来的替代治疗方法奠定基础。