- Supports clinical assessment in pathological high bone turnover
- A complete assay panel supporting bone disease management
The Alpha CrossLaps® (CTX-I) EIA is an enzyme-linked immunosorbent assay for the quantification of non-isomerized fragments of C-terminal telopeptides of Type-I collagen (α CTX-I) in human urine. Alpha CrossLaps® (CTX-I) EIA is intended for use as an indicator of degradation of non-isomerised bone collagen and may be used as an aid in the identification of skeletal metastases in patients with breast and prostate cancer. In addition, the Alpha CrossLaps® (CTX-I) EIA may be applied to humans as an aid in the diagnosis of Paget’s disease and the monitoring of anti-resorptive therapy in patients with Paget’s disease.
Type I collagen accounts for more than 90% of the organic matrix of bone and is synthesised primarily in bone. During renewal of the skeleton, type I collagen is degraded, and small peptide fragments are excreted into the urine. These fragments can be measured by the Alpha CrossLaps® (CTX-I) EIA.
The Alpha CrossLaps® (CTX-I) EIA is based on one highly specific monoclonal antibody against the amino acid sequence of EKAHDGGR. In order to obtain a specific signal in the Alpha CrossLaps® (CTX-I) EIA, two chains of EKAHDGGR must be cross linked.
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