Cutting-Edge Technologies for Inflamed Joints on Chip: How Close Are We?

Area of Science:

• Biomedical Engineering
• Tissue Engineering
• Osteoarthritis Research

Background:

• Osteoarthritis (OA) is a debilitating musculoskeletal disorder causing significant pain and functional limitations.
• Inflammation and cartilage extracellular matrix (ECM) degradation are key pathological features of OA, driven by inflammatory cytokines.
• Current treatments for OA pain are insufficient, highlighting the need for better models to understand disease mechanisms and identify therapeutic targets.

Purpose of the Study:

• To review the evolution of in vitro models for studying joint tissue and osteoarthritis.
• To discuss the progression from 2D cultures to advanced organ-on-a-chip platforms.
• To explore potential upgrades for in vitro systems to enhance physiological and pathological modeling of OA.

Main Methods:

• Review of existing literature on cartilage tissue engineering and in vitro modeling techniques.
• Description of 2D and 3D cell culture systems, including scaffold-based approaches.
• Analysis of advanced technologies such as 3D bioprinting, bioreactors, and organ-on-a-chip platforms.

Main Results:

• Early models progressed from simple 2D cultures to 3D systems enhancing cell-cell and cell-matrix interactions.
• 3D bioprinting offers versatile structural arrangements for tissue constructs.
• Organ-on-a-chip technology integrates multiple microenvironments and stimuli to simulate arthritic joint features.

Conclusions:

• A range of in vitro tools, from cartilage pellets to organ-on-a-chip, are available for OA research.
• Continued development and integration of advanced technologies are essential for robust in vitro modeling of joint tissue.
• Enhanced in vitro models hold promise for elucidating OA mechanisms and discovering novel therapeutic targets.