Storage of components varies. See protocol for specific instructions.
Kit Components
Components
Biotinylated Detection Ab Diluent
Concentrated Biotinylated Detection Ab (100x)
Concentrated HRP Conjugate (100x)
Concentrated Wash Buffer (25x)
HRP Conjugate Diluent
Micro ELISA Plate (Dismountable)
Plate Sealer
Product Manual
Reference Standard
Sample Diluent
Stop Solution
Substrate Reagent
Alternate Names for Mouse CTX-1 ELISA Kit (Colorimetric)
Collagen Type 1 C-Telopeptide
Cross Linked C-telopeptide of Type I Collagen
CTX
CTXI
Background
CTX-1, also referred to as either carboxy-terminal cross-linked telopeptide of type 1 collagen or C-terminal end of the telopeptide of type I collagen, is a marker of osteoporosis and bone resorption (1,2). CTX-1 is a common bone turnover marker (BTM) that can easily be measured in the plasma, serum, or urine (1-3). Bone turnover refers to the removal of old bones by resorption followed by generation of new bones (3). CTX-1 is released from intact collagen type 1 by cathepsin K cleavage and can be detected by an antibody against the eight amino acid sequence EKAHDGGR (2,4). Levels of CTX-1 show circadian rhythm variabilities altered by food intake, which makes timing of sample collection an important consideration and is typically done in a fasted state (1,3). Studies show that increased levels of CTX-1 along with bone-specific alkaline phosphatase (BSALP) is associated with increased risk for bone fractures and osteoporosis (3). The most common treatment for osteoporosis is bisphosphonates, which are classified as anti-resorptive drugs that slow the removal of bone (1,3). Another treatment is the Denosumab, a monoclonal antibody for receptor activator of NFkappaB ligand, which shows decreased levels of CTX-1 and other markers within the first 24-hours of treatment (1-3). Conversely, anabolic therapies add bone by focusing on the osteoclast and osteoblast populations. Romosozumab is one specific anabolic drug that showed quick decrease in CTX-1 levels following treatment (2,3).
References
1. Williams, C., & Sapra, A. (2020). Osteoporosis Markers. In StatPearls. StatPearls Publishing.
2. Szulc P. (2018). Bone turnover: Biology and assessment tools. Best Practice & Research. Clinical Endocrinology & Metabolism. https://doi.org/10.1016/j.beem.2018.05.003
3. Park, S. Y., Ahn, S. H., Yoo, J. I., Chung, Y. J., Jeon, Y. K., Yoon, B. H., Kim, H. Y., Lee, S. H., Lee, J., & Hong, S. (2019). Position Statement on the Use of Bone Turnover Markers for Osteoporosis Treatment. Journal of Bone Metabolism. https://doi.org/10.11005/jbm.2019.26.4.213
4. Cremers, C., Garnero, P., Seibel, M. J. (2008). Chapter 87- Biochemical Markers of Bone Metabolism. Principles of Bone Biology (Third Edition). https://doi.org/10.1016/B978-0-12-373884-4.00020-3.
Limitations
This product is for research use only and is not approved for use in humans or in clinical diagnosis. ELISA Kits are guaranteed for 6 months from date of receipt.
Publications for CTX-1 ELISA Kit (NBP2-69074)(12)
We have publications tested in 1 confirmed species: Mouse.
We have publications tested in 1 application: ELISA.
![ELISA: Mouse CTX-1 ELISA Kit (Colorimetric) [NBP2-69074] - Standard curve. Image from verified customer review.](http://images.novusbio.com/fullsize/Mouse-CTX-1-ELISA-Kit-Colorimetric-ELISA-NBP2-69074-img0002.jpg "ELISA: Mouse CTX-1 ELISA Kit (Colorimetric) [NBP2-69074] - Standard curve. Image from verified customer review.")
