MMP mediated type V collagen degradation (C5M) is elevated in ankylosing spondylitis

Area of Science:

• Biochemistry
• Immunology
• Rheumatology

Background:

• Type V collagen plays a crucial role in regulating collagen fibril formation.
• Matrix metalloproteinases (MMPs), specifically MMP-2 and MMP-9, are implicated in extracellular matrix degradation.
• Ankylosing spondylitis (AS) is a chronic inflammatory disease affecting the spine.

Purpose of the Study:

• To develop an enzyme-linked immunosorbent assay (ELISA) for detecting a specific fragment of type V collagen.
• To identify a fragment generated by MMP-2/9 cleavage at amino acid position 1317 (C5M).
• To evaluate the potential of this C5M fragment as a biomarker for ankylosing spondylitis (AS).

Main Methods:

• Developed an ELISA assay targeting the C5M fragment of type V collagen.
• Assessed assay performance with inter- and intra-assay variations of 9.1% and 4.4%, respectively.
• Evaluated 40 AS patients and 40 age-matched controls.

Main Results:

• The developed ELISA demonstrated high precision.
• C5M levels were significantly elevated by 229% in AS patients compared to controls (p<0.0001).
• The assay achieved a diagnostic area under the curve (AUC) of 83%.

Conclusions:

• This study presents the first ELISA for detecting type V collagen degradation.
• Elevated C5M levels in AS patients indicate increased MMP-mediated type V collagen degradation.
• Further investigation is warranted to explore the prognostic and diagnostic utility of this assay in diverse clinical settings.