siRNA-mediated protein knockdown in precision-cut lung slices

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• Small interfering RNA (siRNA) is crucial for gene function studies and therapeutic development by inducing RNA interference (RNAi).
• A significant gap exists between in vitro and in vivo models, hindering research translation.
• Precision-cut tissue slices offer a promising ex vivo model to bridge this gap.

Purpose of the Study:

• To investigate the efficacy of self-deliverable siRNA (Accell siRNA) in achieving protein knockdown in murine lung slices.
• To assess the viability of lung slices during siRNA incubation.
• To evaluate the utility of this model in functional genomics and translational research.

Main Methods:

• Murine lung slices were incubated with Accell siRNA targeting specific genes (Gapdh, Ppib, Serpinh1, Bcl2l1) or non-targeting controls for up to 96 hours.
• Cell viability was assessed throughout the incubation period.
• Messenger RNA (mRNA) and protein knockdown were quantified using appropriate assays.

Main Results:

• Lung slices maintained viability during 96-hour incubation with Accell siRNA.
• Gene-targeting siRNAs induced significant and specific mRNA knockdown.
• Protein knockdown was achieved for fibrogenesis-related targets, influencing fibrogenesis at the mRNA level.

Conclusions:

• Accell siRNA effectively induces both mRNA and protein knockdown in precision-cut murine lung slices.
• This ex vivo model demonstrates utility for functional genomics and translational research.
• The model supports the investigation of gene function and therapeutic target validation in a tissue-specific context.