Relationship between meniscal degeneration and element contents.

Area of Science:

• Orthopedics
• Biochemistry
• Materials Science

Background:

• Meniscal degeneration is a key factor in knee osteoarthritis (OA) and rheumatoid arthritis (RA).
• Understanding the biochemical changes associated with meniscal degeneration is crucial for developing targeted treatments.

Purpose of the Study:

• To investigate the relationship between histological degeneration of the meniscus and its elemental composition.
• To determine if specific elements correlate with the stage of meniscal degeneration in OA and RA patients.

Main Methods:

• Elemental analysis of meniscal tissue from OA, RA, and control groups using inductively coupled plasma-atomic emission spectrometry.
• Histological grading of meniscal degeneration into four stages (0-3).
• Quantification of calcium, phosphorus, sulfur, and magnesium content per gram of dry tissue.

Main Results:

• Calcium content significantly increased with the stage of meniscal degeneration (Stage 0: 0.26±0.16 mg/g; Stage 1: 0.50±0.37 mg/g; Stage 2: 0.69±0.66 mg/g).
• This positive correlation between calcium and degeneration stage was observed in osteoarthritis but was less clear in rheumatoid arthritis.
• No significant correlation was found between degeneration stage and the content of phosphorus, sulfur, or magnesium.
• Control group calcium content was 0.17±0.09 mg/g.

Conclusions:

• Elevated calcium levels in meniscal tissue are associated with the progression of degeneration, especially in osteoarthritis.
• Meniscal calcium content may serve as a potential biomarker for assessing the degree of meniscal degeneration.
• Further research is needed to elucidate the role of calcium in meniscal pathology in RA.