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Human (serum) Calprotectin ELISA

  • Regulatory status:RUO
  • Type:Sandwich ELISA
  • Other names:MRP8/14, Myeloid Related Protein 8/14, Calprotectin
  • Species:Human
Cat. No. Size Price

RHK379-02R 2 x 96 wells (1 kit) $1225
PubMed Product Details
Technical Data


Sandwich ELISA


The human Calprotectin ELISA kit is to be used for the in vitro quantitative determination of human Calprotectin in feces, plasma, serum, sputum and urine samples. This kit is intended for laboratory research use only and is not for use in diagnostic or therapeutic procedures. The kit cannot be used for quantification of the individual MRP-8 (S100A8) or MRP-14 (S100A9) proteins.


Stool, Serum, Urine, Sputum, Plasma

Sample Requirements

100 µl/well


On blue ice packs. Upon receipt, store the product at the temperature recommended below.


Store the complete kit at 2–8°C. Under this condition, the kit is stable until the expiration date (see the label on the box).

Calibration Range

1.6 - 100 ng/ml

Limit of Detection

1.6 ng/ml

Intra-assay (Within-Run)

n = 20

CV = 5.3%

Inter-assay (Run-to-Run)

n = 20
CV = 4.3%



  • RUO
  • working time of 3½ hours
  • calibration range 1.6-100 ng/ml
  • kit measures calprotectin in human stool, serum, plasma, sputum and urine

Research topic

Autoimmunity, Diabetology - Other Relevant Products, Inflammatory bowel disease


Calprotectin, also known as MRP-8/MRP-14 or S100A8/A9 heterocomplex, is formed out of the calcium-binding, migration inhibitory factor-related proteins, MRP-8 (S100A8) and MRP-14 (S100A9). The expression of these proteins is largely confined to the cytosol of neutrophils and monocytes. The complex formation of these proteins is calcium-dependent. Calprotectin comprises 60% of the cytoplasmic protein fraction of circulating polymorphonuclear granulocytes and is also found in monocytes, macrophages and ileal tissue eosinophils. Peripheral blood monocytes carry the antigen extra- and intracellularly, neutrophils only intracellularly. Calprotectin has antibacterial, antifungal, immunomodulating and antiproliferative effects. Furthermore, it is a potent chemotactic factor for neutrophils. Plasma concentrations are elevated in diseases associated with increased neutrophil activity. During intestinal wall inflammation, granulocytes transmigrate through the intestinal wall. Therefore Calprotectin is also detectable in feces. Several investigations report that fecal Calprotectin is significantly increased in intestinal diseases such as inflammatory bowel disease (IBD), Crohn´s disease, ulcerative colitis and colon cancer. In the literature it is described that normal human plasma contains a Calprotectin concentration ranging from ~100 to 3,000 ng/ml.

Summary References (16)

References to S100A8/A9

  • Altwegg LA, Neidhart M, Hersberger M, Muller S, Eberli FR, Corti R, Roffi M, Sutsch G, Gay S, von Eckardstein A, Wischnewsky MB, Luscher TF, Maier W. Myeloid-related protein 8/14 complex is released by monocytes and granulocytes at the site of coronary occlusion: a novel, early, and sensitive marker of acute coronary syndromes. Eur Heart J. 2007 Apr;28 (8):941-8
  • Andres Cerezo L, Mann H, Pecha O, Plestilova L, Pavelka K, Vencovsky J, Senolt L. Decreases in serum levels of S100A8/9 (calprotectin) correlate with improvements in total swollen joint count in patients with recent-onset rheumatoid arthritis. Arthritis Res Ther. 2011;13 (4):R122
  • Andres Cerezo L, Mann H, Pecha O, Plestilova L, Pavelka K, Vencovsky J, Senolt L. Decreases in serum levels of S100A8/9 (calprotectin) correlate with improvements in total swollen joint count in patients with recent-onset rheumatoid arthritis. Arthritis Res Ther. 2011;13 (4):R122
  • Bealer JF, Colgin M. S100A8/A9: a potential new diagnostic aid for acute appendicitis. Acad Emerg Med. 2010 Mar;17 (3):333-6
  • Bhardwaj RS, Zotz C, Zwadlo-Klarwasser G, Roth J, Goebeler M, Mahnke K, Falk M, Meinardus-Hager G, Sorg C. The calcium-binding proteins MRP8 and MRP14 form a membrane-associated heterodimer in a subset of monocytes/macrophages present in acute but absent in chronic inflammatory lesions. Eur J Immunol. 1992 Jul;22 (7):1891-7
  • Chen YS, Yan W, Geczy CL, Brown MA, Thomas R. Serum levels of soluble receptor for advanced glycation end products and of S100 proteins are associated with inflammatory, autoantibody, and classical risk markers of joint and vascular damage in rheumatoid arthritis. Arthritis Res Ther. 2009;11 (2):R39
  • Ghavami S, Rashedi I, Dattilo BM, Eshraghi M, Chazin WJ, Hashemi M, Wesselborg S, Kerkhoff C, Los M. S100A8/A9 at low concentration promotes tumor cell growth via RAGE ligation and MAP kinase-dependent pathway. J Leukoc Biol. 2008 Jun;83 (6):1484-92
  • Heller F, Frischmann S, Grunbaum M, Zidek W, Westhoff TH. Urinary calprotectin and the distinction between prerenal and intrinsic acute kidney injury. Clin J Am Soc Nephrol. 2011 Oct;6 (10):2347-55
  • Limburg PJ, Ahlquist DA, Sandborn WJ, Mahoney DW, Devens ME, Harrington JJ, Zinsmeister AR. Fecal calprotectin levels predict colorectal inflammation among patients with chronic diarrhea referred for colonoscopy. Am J Gastroenterol. 2000 Oct;95 (10):2831-7
  • Lood C, Stenstrom M, Tyden H, Gullstrand B, Kallberg E, Leanderson T, Truedsson L, Sturfelt G, Ivars F, Bengtsson AA. Protein synthesis of the pro-inflammatory S100A8/A9 complex in plasmacytoid dendritic cells and cell surface S100A8/A9 on leukocyte subpopulations in systemic lupus erythematosus. Arthritis Res Ther. 2011;13 (2):R60
  • Mortensen OH, Nielsen AR, Erikstrup C, Plomgaard P, Fischer CP, Krogh-Madsen R, Lindegaard B, Petersen AM, Taudorf S, Pedersen BK. Calprotectin--a novel marker of obesity. PLoS One. 2009;4 (10):e7419
  • Striz I, Trebichavsky I. Calprotectin - a pleiotropic molecule in acute and chronic inflammation. Physiol Res. 2004;53 (3):245-53
  • Terrin G, Passariello A, Manguso F, Salvia G, Rapacciuolo L, Messina F, Raimondi F, Canani RB. Serum calprotectin: an antimicrobial peptide as a new marker for the diagnosis of sepsis in very low birth weight newborns. Clin Dev Immunol. 2011;2011:291085
  • Tibble JA, Sigthorsson G, Foster R, Forgacs I, Bjarnason I. Use of surrogate markers of inflammation and Rome criteria to distinguish organic from nonorganic intestinal disease. Gastroenterology. 2002 Aug;123 (2):450-60
  • Vogl T, Roth J, Sorg C, Hillenkamp F, Strupat K. Calcium-induced noncovalently linked tetramers of MRP8 and MRP14 detected by ultraviolet matrix-assisted laser desorption/ionization mass spectrometry. J Am Soc Mass Spectrom. 1999 Nov;10 (11):1124-30
  • Yong HY, Moon A. Roles of calcium-binding proteins, S100A8 and S100A9, in invasive phenotype of human gastric cancer cells. Arch Pharm Res. 2007 Jan;30 (1):75-81
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