Non-viral Gene Delivery Methods for Bone and Joints.

Area of Science:

• Biomedical Engineering
• Gene Therapy
• Orthopedics

Background:

• Viral gene delivery vectors exhibit high efficiency but pose safety concerns, including immune responses and unpredictable outcomes.
• Non-viral gene delivery methods offer a safer alternative for modulating gene expression transiently in various settings (in vivo, ex vivo, in vitro).
• Connective tissues like bone, cartilage, and intervertebral discs have poor healing capacity, necessitating advanced therapeutic strategies.

Purpose of the Study:

• To review recent advancements in non-viral gene delivery for orthopedic applications, focusing on bone and joint regeneration.
• To summarize current non-viral technologies and their application for delivering genetic material such as microRNA, siRNA, and DNA plasmids.
• To discuss promising non-viral methods for clinical translation in treating bone and joint conditions.

Main Methods:

• Overview of non-viral gene delivery technologies including nano-spheres/engineered vesicles, lipofection, and in vivo electroporation.
• Discussion of gene delivery targets: microRNA (miRNA), silencing RNA (siRNA), and DNA plasmids.
• Summary of studies utilizing non-viral methods for delivering therapeutic agents like bone morphogenic proteins (BMPs), growth factors (GDF5, GDF6), and transcription factors (Brachyury, FOXF1).

Main Results:

• Non-viral methods are being explored for targeted delivery in tissue engineering approaches for articular cartilage and osteochondral defects.
• Specific growth factors and transcription factors show clinical interest for intervertebral disc (IVD) regeneration.
• Despite diverse preclinical studies, the most efficient non-viral gene transfer method for orthopedic applications remains to be definitively identified.

Conclusions:

• Non-viral gene delivery presents a safer and more feasible approach for orthopedic tissue regeneration compared to viral vectors.
• Further validation and optimization of non-viral methods are crucial for successful clinical translation in bone and joint repair.
• Continued research into novel non-viral strategies holds significant potential for improving the treatment of musculoskeletal disorders.