IGF-1 Genome-Edited Human MSCs Exhibit Robust Anti-Arthritogenicity in Collagen-Induced Arthritis

Area of Science:

• Regenerative Medicine
• Immunology
• Genetics

Background:

• Stem cell therapy offers potential for arthritis treatment but requires improved efficacy.
• Enhancing therapeutic properties of stem cells is crucial for effective arthritis management.

Purpose of the Study:

• To investigate the anti-arthritogenic effects of human amniotic mesenchymal stem cells (AMM) engineered to overexpress insulin-like growth factor 1 (IGF-1).
• To evaluate the immunomodulatory and therapeutic potential of these modified AMM in a collagen-induced arthritis (CIA) mouse model.

Main Methods:

• Utilized transcription activator-like effector nucleases (TALENs) to introduce the IGF-1 gene into AMM, creating AMM/I.
• Assessed in vitro immunomodulatory effects via co-culture with IL-1β-treated synovial fibroblasts.
• Evaluated in vivo therapeutic efficacy by transplanting AMM/I into mice with CIA.

Main Results:

• AMM/I co-culture suppressed NF-kB levels in synovial fibroblasts.
• AMMI transplantation significantly attenuated CIA progression, expanded regulatory T-cells, and suppressed T-helper-17 cell activation.
• Treatment increased cartilage proteoglycan expression and reduced inflammatory cell infiltration and pro-inflammatory factors (COX-2, IL-1β, NF-kB, TNF-α).

Conclusions:

• IGF-1 gene-edited human AMM (AMM/I) demonstrate significant anti-arthritogenic properties.
• This approach offers a novel therapeutic strategy for arthritis by modulating immune responses and promoting cartilage health.
• Gene-edited AMM represent a promising alternative for enhancing arthritis treatment efficacy.