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Systemic siRNA delivery to leukocyte-implicated diseases Peer D; Shimaoka MCell Cycle 2009[Mar]; 8 (6): 853-9Short interfering RNA (siRNA), a small duplex of RNA fragment, has proved as an extremely useful research tool to interrogate gene functions in test tubes. However, the transformation of siRNAs from a functional genomic tool into a new therapeutic modality has been hindered by ineffective delivery methods for systemic administration. In this review, we will discuss the recent advances in formulating new delivery strategies that target siRNAs to specific cells following systemic administration. Special emphasis will be given to leukocytes, since siRNA delivery remains exceptionally challenging here due to the unavailability of effective delivery technologies. We will not only detail new platforms that utilize leukocyte integrins as receptor targets for siRNAs delivery, but also show how one of these strategies has been utilized for in vivo drug target validation of a novel anti-inflammatory target, cyclin D1, for inflammatory bowel diseases.|*Drug Delivery Systems[MESH]|Animals[MESH]|Clinical Trials as Topic[MESH]|Cyclin D1/*metabolism[MESH]|Humans[MESH]|Inflammatory Bowel Diseases/*therapy[MESH]|Leukocytes/*metabolism[MESH]|Nanoparticles/*administration & dosage[MESH]|RNA, Small Interfering/*administration & dosage/genetics[MESH] |
