Human CTX-II ELISA Kit — Application Scenarios for Osteoarthritis and Cartilage Degradation Research

CTX-II: The Micromolar Barcode Your Knee Leaves in Your Plasma

C-telopeptide of type II collagen (CTX-II) is a degradation fragment released into biological fluids when type II collagen — the primary structural protein of articular cartilage — is cleaved by collagenases (MMP-13, MMP-1) during cartilage catabolism. Unlike imaging (which shows you the aftermath) or symptom scores (which fluctuate with weather and mood), CTX-II is a direct, quantitative readout of collagen degradation rate at the exact moment your sample was drawn. It has been put forward as a marker of collagen type II degradation being part of osteoarthritis, and CTX-II levels in synovial fluid directly reflect the rate of cartilage metabolism.

Abbkine's Human C-telopeptide of type II collagen (CTX-II) ELISA Kit (KTE62194) delivers a calibration range of 10–160 nmol/L and a limit of detection as low as 1.0 nmol/L — sensitivity sufficient to detect early-stage cartilage catabolism in both preclinical models and human cohorts. Here's how researchers across different fields are putting it to work.

Osteoarthritis Research: Staging, Monitoring, and Therapeutic Response

CTX-II is one of the most successful biochemical markers for osteoarthritis, and assays of markers that reflect breakdown of collagen Type II hold considerable promise for patients with knee or hip OA. Osteoarthritis researchers use this kit to:

• Quantify CTX-II in serum, plasma, and urine from OA patients
• Monitor cartilage degradation dynamics over time and in response to therapy
• Stratify patients by cartilage catabolism rate (rapid vs. slow progressors)
• Evaluate the efficacy of DMOADs (disease-modifying osteoarthritis drugs) in clinical trials

The test used to detect the CTX marker is more specific to bone resorption than any other test currently available.

Rheumatoid Arthritis and Inflammatory Joint Disease

In rheumatoid arthritis, inflammatory cytokines drive MMP-mediated cartilage destruction. Rheumatology researchers use this kit to:

• Quantify CTX-II in serum and synovial fluid from RA patients
• Study cartilage degradation in inflammatory arthritis models
• Monitor treatment response to biologics (anti-TNF, anti-IL-6)
• Investigate CTX-II as a biomarker for joint damage progression

Sports Medicine and Exercise Physiology

Mechanical loading and injury accelerate cartilage turnover, making CTX-II a valuable marker in sports medicine. Researchers use this kit to:

• Quantify CTX-II in serum and urine from athletes
• Study the effects of exercise intensity on cartilage metabolism
• Investigate ACL injury and post-traumatic osteoarthritis risk
• Monitor recovery and rehabilitation progress

Drug Development: Pharmacodynamic Biomarker for DMOADs

For researchers developing disease-modifying osteoarthritis drugs, CTX-II is a dynamic, secretion-coupled readout of active type II collagen degradation that can be tracked in serial samples without biopsy. Drug developers use this kit to:

• Monitor pharmacodynamic responses to anti-catabolic compounds
• Assess drug efficacy in preclinical OA models
• Identify CTX-II as a surrogate endpoint in clinical trials

Why Choose This Kit for Your CTX-II Research?

Kit Components at a Glance

• Human CTX-II microplate (pre-coated with capture antibody)
• Human CTX-II standard
• Human CTX-II detection antibody (biotin-conjugated)
• Streptavidin-HRP
• Standard diluent, assay buffer, HRP substrate, stop solution, wash buffer, plate covers

🔬 Which research field does your work belong to?
Osteoarthritis Research | Rheumatoid Arthritis | Sports Medicine | Drug Development | Other
Share your application with us — we'd love to hear how you're using this kit in your studies!

📌 Reference Link: Human C-telopeptide of type II collagen (CTX-II) ELISA Kit — KTE62194