Ultrasonic Microfluidic Method Used for siHSP47 Loaded in Human Embryonic Kidney Cell-Derived Exosomes for Inhibiting...

Area of Science:

• Biomedical Engineering
• Pulmonary Medicine
• Nanotechnology

Background:

• Idiopathic pulmonary fibrosis (IPF) is a progressive lung disease driven by myofibroblast activation and extracellular matrix deposition.
• Heat shock protein 47 (HSP47) plays a key role in collagen synthesis, making it a therapeutic target for IPF.
• Exosomes (EXOs) are promising drug delivery vehicles, but their low loading efficiency limits application.

Purpose of the Study:

• To develop an efficient method for loading small interfering RNA targeting HSP47 (siHSP47) into exosomes (EXOs).
• To evaluate the therapeutic potential of EXO-siHSP47 in an in vitro model of IPF.

Main Methods:

• An ultrasonic microfluidic technique was used to enhance siHSP47 loading into 293F cell-derived EXOs.
• The efficacy of EXO-siHSP47 in silencing HSP47 expression and reducing extracellular matrix (ECM) deposition was assessed in activated fibroblasts.
• Fibroblast migration and differentiation were evaluated using wound healing and Transwell assays.

Main Results:

• The ultrasonic microfluidic method achieved a 31.1% loading efficiency for siHSP47 into EXOs.
• EXO-siHSP47 successfully penetrated the collagen barrier and silenced HSP47 expression in activated fibroblasts.
• Significant reduction in ECM protein secretion and deposition, as well as inhibited fibroblast migration and differentiation, were observed.

Conclusions:

• 293F-derived EXOs efficiently loaded with siHSP47 demonstrate potential as a therapeutic strategy for IPF.
• This approach overcomes the limitations of exosome loading efficiency for drug delivery applications.
• Targeting HSP47 via EXO-siHSP47 offers a promising new direction for IPF treatment.