Human Galectin-9 Quantikine ELISA Kit

Catalog # Availability Size / Price Qty
DGAL90
Control Products Available
Human Galectin-9 ELISA Serum/Plasma/Urine Standard Curve
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Product Details
Procedure
Citations (4)
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Reviews (1)

Human Galectin-9 Quantikine ELISA Kit Summary

Assay Type
Solid Phase Sandwich ELISA
Format
96-well strip plate
Assay Length
4.5 hours
Sample Type & Volume Required Per Well
Cell Culture Supernates (100 uL), Serum (25 uL), EDTA Plasma (25 uL), Heparin Plasma (25 uL), Saliva (100 uL), Urine (10 uL), Human Milk (10 uL)
Sensitivity
0.028 ng/mL
Assay Range
0.2 - 10 ng/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Saliva, Urine, Human Milk)
Specificity
Natural and recombinant human Galectin-9.
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 Galectin-9 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human Galectin-9 in cell culture supernates, serum, plasma, saliva, urine, and human milk. It contains E. coli-expressed recombinant human Galectin-9 and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human Galectin-9 showed linear 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 naturally occurring human Galectin-9.

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 twenty separate assays to assess inter-assay precision. Assays were performed by at least three technicians using two lots of components

Cell Culture Supernates, Saliva, Human Milk

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean 1.34 3.58 6.13 1.44 3.43 6.05
Standard Deviation 0.05 0.12 0.22 0.08 0.18 0.32
CV% 3.7 3.4 3.6 5.6 5.2 5.3

Serum, EDTA Plasma, Heparin Plasma, Urine

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean 1.44 3.77 6.29 1.4 3.28 5.84
Standard Deviation 0.06 0.07 0.08 0.11 0.2 0.3
CV% 4.2 1.9 1.3 7.9 6.1 5.1

Recovery

The recovery of human Galectin-9 spiked to levels throughout the range of the assay was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 96 84-104
EDTA Plasma (n=4) 103 85-117
Heparin Plasma (n=4) 104 89-117
Serum (n=4) 106 86-117

Linearity

To assess the linearity of the assay, samples containing high concentrations of human Galectin-9 were diluted with Calibrator Diluent to produce samples with values within the dynamic range of the assay.
Human Galectin-9 ELISA Linearity

Data Examples

Human Galectin-9 ELISA Serum/Plasma/Urine Standard Curve

Human Galectin-9 ELISA Cell Culture Supernate/Saliva/Milk Standard Curve

Product Datasheets

Preparation and Storage

Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: Galectin-9

The galectins constitute a large family of carbohydrate-binding proteins that function in many systems both intracellularly and following secretion. Galectins contain either one or two carbohydrate recognition domains (CRR) which mediate recognition of N-acetyl-lactosamine-containing glycoproteins. Some galectins exist in multiple isoforms due to alternative splicing. Individual galectins differ in their tissue distribution and in their carbohydrate-binding specificities.

Entrez Gene IDs:
3965 (Human); 16859 (Mouse)
Alternate Names:
Ecalectin; GAL9; gal-9; galectin 9; Galectin9; Galectin-9; HUAT; lectin, galactoside-binding, soluble, 9; LGALS9; LGALS9A; MGC117375; MGC125973; MGC125974; Tumor antigen HOM-HD-21; urate transporter/channel protein
⚠ WARNING: This product can expose you to chemicals including N,N-Dimethylforamide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

Assay Procedure

Refer to the product for complete assay procedure.

Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
  1.   Prepare all reagents, standard dilutions, and samples as directed in the product insert.
  2.   Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.

  3. 100 µL Assay Diluent
  4.   Add 100 µL Assay Diluent to each well.

  5. 100 µL Standard, Control, or Sample
  6.   Add 100 µL of Standard, control, or sample to each well. Cover with a plate sealer, and incubate at room temperature for 2 hours on a horizontal orbital microplate shaker.
  7.   Aspirate each well and wash, repeating the process 3 times for a total of 4 washes.

  8. 200 µL Conjugate
  9.   Add 200 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours on the shaker.
  10.   Aspirate and wash 4 times.

  11. 200 µL Substrate Solution
  12.   Add 200 µL Substrate Solution to each well. PROTECT FROM LIGHT.
  13.   For Cell Culture Supernate, Saliva, or Human Milk Samples: Incubate at room temperature for 20 minutes on the benchtop.
    For Serum, Plasma, or Urine Samples: Incubate at room temperature for 30 minutes on the benchtop.

  14. 50 µL Stop Solution
  15. Add 50 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.

Citations for Human Galectin-9 Quantikine ELISA Kit

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.

4 Citations: Showing 1 - 4
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  1. Serum levels of galectin-1, galectin-3, and galectin-9 are associated with large artery atherosclerotic stroke
    Authors: XW He, WL Li, C Li, P Liu, YG Shen, M Zhu, XP Jin
    Sci Rep, 2017;7(0):40994.
    Species: Human
    Sample Types: Serum
  2. TIM-3 plays a more important role than PD-1 in the functional impairments of cytotoxic T cells of malignant Schwannomas
    Authors: Z Li, X Liu, R Guo, P Wang
    Tumour Biol., 2017;39(5):1010428317698.
    Species: Human
    Sample Types: Cell Culture Supernates
  3. Increased peripheral cd4+ regulatory t cells persist after successful direct-acting antiviral treatment of chronic hepatitis C
    Authors: Bettina Langhans
    J. Hepatol, 2016;0(0):.
    Species: Human
    Sample Types: Serum
  4. Human Galectin-9 Is a Potent Mediator of HIV Transcription and Reactivation
    Authors: Mohamed Abdel-Mohs
    PLoS Pathog, 2016;12(6):e1005677.
    Species: Human
    Sample Types: Plasma

FAQs

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Human Galectin-9 Quantikine ELISA Kit
By Anonymous on 06/21/2016
Sample Tested: Mesenchymal stem cells