Validating the use of short interfering RNA as a novel technique for cell-specific target gene knockdown in XXXX -reperfusion injury.

@entity2939 @entity45182 @entity1885 @entity63
OBJECTIVE: Short interfering RNA is an effective method for target gene knockdown. However, concerns surround the design, administration, efficacy, specificity, and immunostimulatory potential. Although uptake by alveolar macrophages has been demonstrated, studies have not examined its use in @entity63 -reperfusion injury. We describe the validation of short interference RNA as a novel technique for cell-specific target gene knockdown in our model of @entity63 -reperfusion injury. METHODS: Dose-response experiments were performed, and 3 distinct sequences of @entity45182 , and myeloid differentiation factor-88 short interference RNA were tested for efficacy of knockdown. Saline, lipid vector, and noncoding short interference RNA controls were used. Similar experiments were performed in primary cultures of resident pulmonary cells. Target protein knockdown was assessed by Western blot. Rat serum and cell culture media were assessed for interferon and cytokine production. Biotin labeling was used to assess short interference RNA uptake. RESULTS: Target protein expression was significantly reduced using short interference RNA. However, @entity2939 knockdown was isolated to alveolar macrophages, and @entity1885 labeling confirmed @entity2939 short interference RNA localization to alveolar macrophages. There was significant knockdown of @entity2939 expression in cultured cells treated with @entity2939 short interference RNA. There was no significant change in interferon production after short interference RNA treatment. There was effective target protein knockdown with each sequence used. CONCLUSIONS: Short interference RNA is a valid method for achieving target protein knockdown in alveolar macrophages and is an important tool in the evaluation of its role in the development of @entity63 -reperfusion injury.
