Autoimmune Reactivity Screen

Collagen Complex

Optimal Result: 0.2 - 1.5 ELISA Index.

Function:

Collagen is a group of proteins found in the flesh and connective tissues. The most abundant protein of the human body, Collagen is the main component of connective tissue. Collagen is found in tissues such as tendon, ligament and skin, and is also abundant in cornea, cartilage, bone, blood vessels, the gut, and intervertebral disc. The fibroblast is the most common cell which creates collagen. In muscle tissue, collagen serves as a major component of the endomysium.

Antibodies Appear:

Arthritis [4]

Goodpasture’s Syndrome (*rat study) [1]

Type 1 Bullous SLE [3]

Known Cross-Reactions:

Clostridium botulinum, RNA polymerase 20–32, Streptococcus pyogenes; [1] Porphyromonas gingivalis; [5,6] Klebsiella; [7] Chicken collagen; [8] Cow, Pig, Goat and Dog collagen; [9] Cow gelatin [10]

Clinical Significance:

High levels of antibodies to Collagen Complex are noted in autoimmune arthritic disorders. [3, 4]

Circulating antibodies to collagen appear years before the clinical onset of arthritic conditions and is therefore considered an early biomarker or predictor of autoimmune arthritis. [2]

Blistering seen in bullous systemic lupus erythematosus may not always be widespread as shown by Fujii et al, [3] they can develop on limited parts of the body. Circulating collagen antibodies demonstrate the involvement of an autoimmune mechanism. [3]

In a rat study, Arends et al. were able to show that infections with microbial peptides may induce antiglomerular basement membrane disease or Goodpasture’s syndrome through T cell epitope mimicry. [1]

References:

1. Arends, et al. T cell epitope mimicry in antiglomerular basement membrane disease. J Immunol, 2006; 176:1252-1258.

2. Dzhambazov, et al. Therapeutic vaccination of active arthritis with a glycosylated collagen type II peptide in complex with MHC class II molecules. J Immunol, 2006; 176:1525-1533.

3. Fujii, et al. Detection of anti-type VII collagen antibody in Sjögren’s syndrome/lupus erythematosus overlap syndrome with transient bullous systemic lupus erythematosus. Br J Dermatol, 1998; 139:302-306.

4. Khare, et al. Oral administration of immunodominant human collagen peptide modulates collagen-induced arthritis. J Immunol, 1995; 155(7):3653-3659.

5. Vojdani. A potential link between environmental triggers and autoimmunity. Autoimmune Dis, 2014; 2014:437231.

6. Lundberg, et al. Periodontitis in RA – the citrullinated enolase connection. Nat Rev Rheumatol, 2010; 6(12):727-30.

7. Ebringer, et al. Ankylosing spondylitis, HLA-B27 and Klebsiella - an overview: proposal for early diagnosis and treatment. Curr Rheumatol Rev, 2006; 2(1):289-297.

8. Petkovic and Metlas. Cross-reactivity of the V3-specific antibodies with the human C1q. Z Naturforsch C, 2001; 56(11- 12):1135-1143.

9. Werkmeister, et al. Characterisation of a monoclonal antibody against native human type I collagen. Eur J Biochem, 1990; 187:439-443.

10. Sakaguchi, et al. Reactivity of IgE and IgG antibodies to human collagen type 1 in children with bovine gelatin allergy. J Allergy Clin Immunol, 2004; 113(2):S181.

What does it mean if your Collagen Complex result is too high?

High levels of antibodies to Collagen Complex are noted in autoimmune arthritic disorders. [3, 4]

Circulating antibodies to collagen appear years before the clinical onset of arthritic conditions and is therefore considered an early biomarker or predictor of autoimmune arthritis. [2]

Blistering seen in bullous systemic lupus erythematosus may not always be widespread as shown by Fujii et al, [3] they can develop on limited parts of the body. Circulating collagen antibodies demonstrate the involvement of an autoimmune mechanism. [3]

In a rat study, Arends et al. were able to show that infections with microbial peptides may induce antiglomerular basement membrane disease or Goodpasture’s syndrome through T cell epitope mimicry. [1]

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