Human Cystatin C Magnetic Luminex® Performance Assay

For use with the magnetic Kidney Biomarker Panel

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Quantist software graph of signal intensity versus concentration for Cystatin C in the Human Kidney Biomarker Luminex Panel
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Human Cystatin C Magnetic Luminex® Performance Assay Summary

Panel Luminex Performance Human Kidney Biomarker Panel
Assay Type Magnetic bead-based multiplex assay for the Luminex® platform
Format 1 x 96-well microplate and Magnetic antibody-coated beads
Species Human
Analytes Detected Please see analyte list in assay customization tool below.
Performance Validation Our Luminex High Performance Assays undergo our most extensive validation testing. All Luminex High Performance Assay Panels are validated for use with serum and plasma samples. Some High Performance Assays are additionally validated for cell culture supernatants, milk, saliva, or urine, as indicated on the individual product data sheets. Luminex High Performance Assays are tested for sensitivity (three-quarters the low standard), intra-assay precision, inter-assay precision, and to ensure assay linearity for validated sample types. Recovery values for individual samples in validated sample types are also tested. Validation data for each analyte can be found in the product datasheet.

Make your selections below to configure your assay

Filter Analytes
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Clusterin
Cystatin C
Osteopontin/OPN
CXCL10/IP-10/CRG-2
Lipocalin-2/NGAL
TFF3

Assays

Below are kits that are available based on your selections. These selections may be further customized before adding to the cart or emailing the configuration to your purchasing department or local distributor to place your order. Selected analytes may be included in more than one High Performance Assay. All assay options are displayed.

If you run into bead region incompatibilities, send your Luminex code to our team and find out more.

This product is only available in the mixing displayed below. For more options, please use the full tool.
User Mixed
Please select at least one mixing option to see the kits.

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Product Features

Magnetic Luminex High Performance Assays are flexible bead-based multiplex assays. They allow up to 50 user-defined target analytes to be simultaneously profiled using cell culture supernates, serum, or plasma samples. Some panels are also validated with human milk, saliva, and/or urine samples.

  • Simultaneously profile Human Cystatin C with up to 5 analytes of your choice in one sample
  • Magnetic format allows for easier wash steps
  • Undergoes similar validation testing as Quantikine® ELISA Kits
  • Precise and Specific
  • Requires a small sample volume (<50 µL)
  • Run your assay in just 3-5 hours
  • Mass-calibrated standards for consistent results with every new lot of material
  • Enough reagents for one 96-well plate
Base Kit Components
  • Standard Cocktail(s)
  • Bead Diluent
  • Biotin Antibody Diluent
  • Calibrator Diluent
  • Wash Buffer
  • Streptavidin-PE
  • One flat-bottom 96-well Microplate
  • Foil Plate Sealers (4)
  • Mixing Bottle
  • Standard Value Card**

**A standard curve must be generated each time an assay is run, utilizing values from the Standard Value Card included in the Base Kit.

Bead Set Contents
  • User-mix antibody-coated Magnetic beads in individual vials
  • User-mixed cocktail of biotinylated detection antibody

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 separate assays to assess precision between assays.

  Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 73 71 73
Mean (pg/mL) 548 3931 10,998 529 3804 9053
Standard deviation 13.5 62 699 46.7 358 816
CV (%) 2.5 1.6 6.4 8.8 9.4 9.0

 

Linearity

Samples containing and/or spiked with human Cystatin C were serially diluted to evaluate assay linearity.

  Serum EDTA plasma Heparin plasma Urine
1:2 Average % of Expected 98 91 93 91
Range (%) 93-104 89-92 87-105 88-98
1:4 Average % of Expected 85 80 101 89
Range (%) 78-95 75-85 95-111 87-91
1:8 Average % of Expected N/A N/A N/A 89
Range (%) N/A N/A N/A 87-90
Which Luminex Assay is right for me?

Assays for the Luminex platform are offered as High Performance Assays or Assays. The Luminex High Performance Assays are fully validated panels with a focused selection of analytes. They are available in We Mix, You Mix, and Predetermined formats. The Luminex Assays allows for the maximum number of analytes in a multiplex and is supplied as a premixed kit. View a table comparing the features and benefits of these bead-based multiplex assays.

More Information About Magnetic Bead-based Multiplex Kits For The Luminex® Platform

Magnetic Luminex High Performance Assays are designed for use with the Luminex MAGPIX CCD Imager. Alternatively, kits can be used with the Luminex 100/200™ or FLEXMAP 3D, dual laser, flow-based sorting and detection platforms.

Analyte-specific antibodies are pre-coated onto color-coded microparticles. Microparticles, standards, and samples are pipetted into wells and the immobilized antibodies bind the analytes of interest. After washing away any unbound substances, a biotinylated antibody cocktail specific to the analytes of interest is added to each well. Following a wash to remove any unbound biotinylated antibody, Streptavidin-Phycoerythrin conjugate (Streptavidin-PE), which binds to the biotinylated detection antibodies, is added to each well. A final wash removes unbound Streptavidin-PE and the microparticles are resuspended in buffer and read using the Luminex or Bio-Plex analyzer. One laser is bead-specific and determines which analyte is being detected. A magnet in the analyzer captures and holds the superparaMagnetic microparticles in a monolayer. Two spectrally distinct Light Emitting Diodes (LEDs) illuminate the beads. One LED identifies the analyte that is being detected and the second LED determines the magnitude of the PE-derived signal, which is in direct proportion to the amount of analyte bound. Each well is imaged with a CCD camera. Kits can also be used with Luminex 100/200 or a Bio-Rad Bio-Plex dual laser, flow-based systems.

Scientific Data

Quantist software graph of signal intensity versus concentration for Cystatin C in the Human Kidney Biomarker Luminex Panel

Background: Cystatin C

Cystatin C is a secreted cysteine protease inhibitor that inhibits Cathepsins B, H, K, L, and S. Cystatin C serum concentration correlates closely to the glomerular filtration rate (GFR); elevated levels are associated with coronary artery and cardiovascular disease risk. Dysregulation of Cystatin C can modulate tumor growth and metastasis. In humans, the L68Q variant forms dimers and oligomers more easily than wild type protein and is the cause for hereditary Cystatin C amyloid angiopathy.

Entrez Gene IDs
1471 (Human); 13010 (Mouse); 25307 (Rat)
Alternate Names
ARMD11; bA218C14.4 (cystatin C); CST3; cystatin 3; cystatin C (amyloid angiopathy and cerebral hemorrhage); Cystatin C; cystatin-3; cystatin-C; Gamma-trace; MGC117328; Neuroendocrine basic polypeptide; Post-gamma-globulin

Product Datasheets

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Product Specific Notices
Luminex® is a registered trademark of Luminex Corporation.

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