Molecular Classification of Knee Osteoarthritis

Area of Science:

• Biochemistry
• Molecular Biology
• Orthopedics

Background:

• Knee osteoarthritis (KOA) is a prevalent joint degeneration disorder.
• Current KOA diagnosis and treatment overlook its molecular pathophysiology.
• Molecular differences may explain treatment failures in clinical trials.

Purpose of the Study:

• Propose a novel molecular classification for KOA.
• Categorize KOA based on temporal molecular alterations.
• Improve KOA diagnosis, risk prediction, and treatment selection.

Main Methods:

• Classifying KOA into pre-KOA, early KOA, progressive KOA, and end-stage KOA stages.
• Subtyping progressive KOA into cartilage degradation-driven, bone remodeling-driven, inflammation-driven, and pain-driven subtypes.
• Reviewing and categorizing clinical findings of molecules in KOA.

Main Results:

• A novel molecular classification system for knee osteoarthritis (KOA) is proposed.
• Progressive KOA is subtyped based on dominant pathological mechanisms.
• The classification integrates temporal molecular changes and pathophysiology.

Conclusions:

• The proposed molecular classification aids in predicting high-risk KOA.
• It facilitates early KOA diagnosis and therapeutic efficacy assessment.
• Enables selection of homogenous patient groups for targeted therapies.