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Citations (5)
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  • Assay Length
    4.5 hours
  • Sample Type & Volume Required Per Well
    Cell Culture Supernates (50 uL), Serum (10 uL), EDTA Plasma (10 uL), Heparin Plasma (10 uL), Saliva (10 uL), Urine (50 uL)
  • Sensitivity
    0.072 ng/mL
  • Assay Range
    0.3 - 20 ng/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Saliva, Urine)
  • Specificity
    Natural and recombinant human DPPIV.
  • Cross-reactivity
    < 0.5% cross-reactivity observed with available related molecules.< 50% cross-species reactivity observed with species tested.
  • Interference
    No significant interference observed with available related molecules.
Product Summary
The Quantikine® Human DPPIV/CD26 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human DPPIV in cell culture supernates, serum, plasma, saliva, and urine. It contains NS0-expressed recombinant human DPPIV, and antibodies raised against the recombinant factor. Results obtained using natural human DPPIV showed dose-response curves that were parallel to the standard curves obtained using the Quantikine® kit standards. These results indicate that this kit can be used to determine relative mass values for natural human DPPIV.

Precision
Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision
Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in forty separate assays to assess inter-assay precision. Assays were performed by at least three technicians using two lots of components
Cell Culture Supernates, Saliva, Urine
Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean 2.16 8.15 14.1 2.22 8.25 14.6
Standard Deviation 0.105 0.28 0.916 0.14 0.695 1.18
CV% 4.9 3.4 6.5 6.3 8.4 8.1

Serum, EDTA Plasma, Heparin Plasma
Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 40 40 40
Mean 2.32 8.78 15.8 2.43 8.53 15.9
Standard Deviation 0.142 0.354 1.15 0.207 0.777 1.3
CV% 6.1 4 7.3 8.5 9.1 8.2

Recovery

The recovery of human DPPIV spiked to levels throughout the range of the assay in various matrices was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 101 87-113
Urine (n=4) 101 88-113
Linearity
To assess linearity of the assay, samples containing and/or spiked with high concentrations of human DPPIV were diluted with calibrator diluent to produce samples with values within the dynamic range of the assay.
 DPPIV/CD26
Product Datasheets

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Preparation and Storage
  • Storage
    Store the unopened product at 2 - 8 °C. Do not use past expiration date.
Background: DPPIV/CD26
Dipeptidyl peptidase IV (DPPIV/CD26) is a serine exopeptidase that releases Xaa-Pro dipeptides from the N-terminus of proteins and peptides. It plays an important role in T-cell costimulation, chemokine biology, type II diabetes and tumor biology. There are at least 15 DPPIV-related human genes. Some function as enzymes, including DPP8, DPP9, fibroblast activation protein (FAP), prolyl endopeptidase (PREP), and N-acylaminoacyl-peptide hydrolase (APEH) while others (DPP6/DPPX and DPP10/DPRP3) may have lost their protease properties but acquired novel functions. For example, DPP6 is a critical component of neuronal A-type K+ channels.
  • Long Name:
    Dipeptidyl-peptidase IV
  • Entrez Gene IDs:
    1803 (Human); 13482 (Mouse); 102133935 (Cynomolgus Monkey)
  • Alternate Names:
    ADABP; ADCP-2; ADCP2DPP IV; Adenosine deaminase complexing protein 2TP103; CD26 antigen; CD26; CD26T-cell activation antigen CD26; dipeptidyl peptidase 4; Dipeptidyl peptidase IV; dipeptidylpeptidase 4; dipeptidyl-peptidase 4; dipeptidylpeptidase IV (CD26, adenosine deaminase complexing protein 2); DPP4; DPPIV; EC 3.4.14.5
Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

5 Citations: Showing 1 - 5
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Species
Sample Type
  1. Correction of vitamin D deficiency facilitated suppression of IP-10 and DPP IV levels in patients with chronic hepatitis C: A randomised double-blinded, placebo-control trial
    Authors: P Komolmit, K Charoensuk, K Thanapirom, S Suksawatam, P Thaimai, C Chirathawo, Y Poovorawan
    PLoS ONE, 2017;12(4):e0174608.
    Species: Human
    Sample Type: Serum
  2. Dipeptidyl peptidase-IV in chronic heart failure with reduced ejection fraction
    Authors: P Lourenço, S Silva, F Cunha, J Pereira, A Ribeiro, N Silva, JT Guimarães, JP Araújo, P Bettencour
    Int. J. Cardiol, 2017;0(0):.
    Species: Human
    Sample Type: Serum
  3. Adiponectin, chemerin, cytokines, and dipeptidyl peptidase 4 are released from human adipose tissue in a depot-dependent manner: an in vitro system including human serum albumin.
    Authors: Svensson H, Oden B, Eden S, Lonn M
    BMC Endocr Disord, 2014;14(0):7.
    Species: Human
    Sample Type: Tissue Homogenates
  4. Early and late effects of the DPP-4 inhibitor vildagliptin in a rat model of post-myocardial infarction heart failure.
    Authors: Yin M, Sillje HH, Meissner M, van Gilst WH, de Boer RA
    Cardiovasc Diabetol, 2011;10(0):85.
    Species: Human
    Sample Type: Plasma
  5. Serum level of CD26 predicts time to first treatment in early B-chronic lymphocytic leukemia.
    Authors: Molica S, Digiesi G, Mirabelli R, Cutrona G, Antenucci A, Molica M, Giannarelli D, Sperduti I, Morabito F, Neri A, Baldini L, Ferrarini M
    Eur. J. Haematol., 2009;83(0):208-14.
    Species: Human
    Sample Type: Serum

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