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Human Clusterin ELISA Kit - Quantikine

Catalog #: DCLU00
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Human Clusterin ELISA Standard Curve
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Summary Sample Values Precision Recovery Linearity Data Examples Product Datasheets Preparation and Storage Background Related Research Areas

Human Clusterin 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 (50 uL), Serum (10 uL), EDTA Plasma (10 uL), Heparin Plasma (10 uL), Saliva (25 uL), Urine (13 uL)
Sensitivity
1.05 ng/mL
Assay Range
3.1 - 200 ng/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Saliva, Urine)
Specificity
Natural and recombinant human Clusterin
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.

Sample Values

Serum/Plasma/Saliva/Urine - Samples from apparently healthy volunteers were evaluated for the presence of human Clusterin in this assay. No medical histories were available for the donors used in this study.

Sample TypeMean (μg/mL)Range (μg/mL)Standard Deviation (μg/mL)
Serum (n=36)266195-37842.8
Heparin plasma (n=36)266190-37744.6
EDTA plasma (n=36)261185-43652.0

Sample TypeMean (ng/mL)Range (ng/mL)Standard Deviation (ng/mL)
Salive (n=17)33485.2-624176
Urine (n=21)28085.2-628171

Cell Culture Supernates: 
Human peripheral blood leukocytes (PBLs) were cultured in DMEM supplemented with 5% fetal bovine serum, 50 μM beta -mercaptoethanol, 2 mM L-glutamine, 100 U/mL penicillin, and 100 μg/mL streptomycin sulfate. Cells were cultured unstimulated or stimulated with 10 μg/mL PHA. Aliquots of the cell culture supernates were removed and assayed for levels of human Clusterin. All samples were non-detectable.

HepG2 human hepatocellular carcinoma cells were cultured in MEM (NEAA salts) supplemented with 10% fetal bovine serum, 50 μM beta -mercaptoethanol, 2 mM L-glutamine, 100 U/mL penicillin, and 100 μg/mL streptomycin sulfate. An aliquot of the cell culture supernate was removed, assayed for human Clusterin, and measured 574 ng/mL.

HeLa cervical epithelial carcinoma cells were cultured in RPMI supplemented with 10% fetal bovine serum, 50 μM beta -mercaptoethanol, 2 mM L-glutamine, 100 U/mL penicillin, and 100 μg/mL streptomycin sulfate. An aliquot of the cell culture supernate was removed, assayed for human Clusterin, and measured 863 ng/mL.

HUVEC human umbilical vein endothelial cells were cultured in EGM-2 media and stimulated with recombinant human IL-1 beta for 24 hours. An aliquot of the cell culture supernate was removed, assayed for human Clusterin, and measured 17.3 ng/mL.




Product Summary

The Quantikine Human Clusterin Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human Clusterin in cell culture supernates, serum, plasma, urine, and saliva. It contains NS0-expressed recombinant human Clusterin and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human Clusterin 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 Clusterin.

Precision

Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision

Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Saliva, Urine

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3
n 20 20 20
Mean (pg/mL) 19 64.3 130
Standard Deviation 0.7 2.4 4.5
CV% 3.7 3.7 3.5

Recovery

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

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 107 102-110

Linearity

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

Scientific Data

N/A Human Clusterin ELISA Standard Curve View Larger

Human Clusterin ELISA Standard Curve

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Preparation and Storage

Shipping
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: Clusterin

Clusterin [also known as Apolipoprotein J, Sulfated Glycoprotein 2 (SGP-2), TRPM-2, and SP-40], is a secreted multifunctional protein that was named for its ability to induce cellular clustering. It binds a wide range of molecules and may function as a chaperone of misfolded extracellular proteins. It also participates in the control of cell proliferation, apoptosis, and carcinogenesis (1, 2). Clusterin is predominantly expressed in adult testis, ovary, adrenal gland, liver, heart, brain, and in many epithelial tissues during embryonic development (3). Human Clusterin is synthesized as a precursor that contains two coiled coil domains, three nuclear localization signals (NLS), and one heparin binding domain (4 - 6). Intracellular cleavages of the precursor remove the signal peptide and generate comparably sized alpha and beta chains which are secreted as an approximately 80 kDa N-glycosylated and disulfide-linked heterodimer (7-9). Mature human Clusterin shares a 77% amino acid sequence identity with mouse and rat Clusterin. 

High μg/mL concentrations of Clusterin circulate predominantly as a component of high density lipoprotein particles, and these are internalized and degraded through interactions with LRP-2/Megalin (10, 11). The ability of Clusterin to bind and neutralize non-oxidatively modified LDL reduces cytotoxicity in atherosclerotic plaques (12). The chaperone function of Clusterin helps to reduce the accumulation of beta -amyloid fibrils and damage due to amyloid plaques in Alzheimer's disease (13). An alternately spliced 50 kDa isoform of human Clusterin (nCLU) remains intracellular and is neither glycosylated nor cleaved into alpha and beta chains (5, 14). Cellular exposure to ionizing radiation promotes the translocation of nCLU to the nucleus where it interacts with Ku70 and promotes apoptosis (5, 14). This function contrasts with the cytoprotective effect of secreted Clusterin (15). During tumor progression, nCLU is down regulated while the secreted form is upregulated and may be aberrantly glycosylated (14, 16, 17). Increased circulating levels of Clusterin enhance tumor aggressiveness by inhibiting apoptosis and by promoting the epithelial to mesenchymal transition (18-20).

Entrez Gene IDs:
1191 (Human); 12759 (Mouse)
Alternate Names:
40; 40, sulfated glycoprotein 2; Aging-associated gene 4 protein; aging-associated protein 4; APOJ; apo-J; Apolipoprotein J; CLI; CLIclusterin (complement lysis inhibitor, SP-40; CLU; Clusterin; Complement cytolysis inhibitor; complement lysis inhibitor; Complement-associated protein SP-40; Ku70-binding protein 1; KUB1SGP2; MGC24903; NA1/NA2; SGP-2; SP-40; sulfated glycoprotein 2; Testosterone-repressed prostate message 2; testosterone-repressed prostate message 2, apolipoprotein J); TRPM-2; TRPM-2TRPM2
&#9888; 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
  3.   Add 100 µL of Assay Diluent to each well.
    4. 50 µL Standard, Control, or Sample
  4.   Add 50 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.
  5.   Aspirate each well and wash, repeating the process 3 times for a total of 4 washes.
    6. 200 µL Conjugate
  6.   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.
  7.   Aspirate and wash 4 times.
    8. 200 µL Substrate Solution
  8.   Add 200 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes on the benchtop. PROTECT FROM LIGHT.
    9. 50 µL Stop Solution
  9.   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 Clusterin 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.

15 Citations: Showing 1 - 10
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  1. Alzheimer's disease protective allele of Clusterin modulates neuronal excitability through lipid-droplet-mediated neuron-glia communication
    Authors: Zhao, X;Li, Y;Zhang, S;Sudwarts, A;Zhang, H;Kozlova, A;Moulton, MJ;Goodman, LD;Pang, ZP;Sanders, AR;Bellen, HJ;Thinakaran, G;Duan, J;
    medRxiv : the preprint server for health sciences
    Species: Human
    Sample Types: Cell Culture Supernates
  2. Utility of Three Serum Biomarkers for Early Detection of Systemic Envenoming Following Viper Bites in Sri Lanka
    Authors: Wedasingha, S;Silva, A;Fakes, K;Siribaddana, S;Isbister, GK;
    Annals of emergency medicine
    Species: Human
    Sample Types: Serum
  3. Serum and urinary biomarkers of vancomycin-induced acute kidney injury: A prospective, observational analysis
    Authors: Park, SI;Yu, U;Oh, WS;Ryu, SW;Son, S;Lee, S;Baek, H;Park, JI;
    Medicine
    Species: Human
    Sample Types: Urine
  4. Clinical usefulness of urinary biomarkers for early prediction of acute kidney injury in patients undergoing transaortic valve implantation
    Authors: Obata, Y;Kamijo-Ikemori, A;Shimmi, S;Inoue, S;
    Scientific reports
    Species: Human
    Sample Types: Urine
  5. Metabolic Syndrome, Clusterin and Elafin in Patients with Psoriasis Vulgaris
    Authors: D Holmannova, P Borsky, L Borska, C Andrys, K Hamakova, V Rehacek, T Svadlakova, A Malkova, M Beranek, V Palicka, J Krejsek, Z Fiala
    Int J Mol Sci, 2020-08-05;21(16):.
    Species: Human
    Sample Types: Serum
  6. Clusterin from human clinical tear samples: Positive correlation between tear concentration and Schirmer strip test results
    Authors: V Yu, D Bhattachar, A Webster, A Bauskar, C Flowers, M Heur, SK Chintala, T Itakura, MR Wilson, JT Barr, S Jeong, M Wang, ME Fini
    Ocul Surf, 2018-08-02;0(0):.
    Species: Human
    Sample Types: Protein
  7. Relevance of N-terminal residues for amyloid-? binding to platelet integrin ?IIb?3, integrin outside-in signaling and amyloid-? fibril formation
    Authors: L Donner, L Gremer, T Ziehm, CGW Gertzen, H Gohlke, D Willbold, M Elvers
    Cell. Signal., 2018-06-30;0(0):.
    Species: Human
    Sample Types: Cell Culture Supernates
  8. Role of clusterin/progranulin in toluene diisocyanate-induced occupational asthma
    Authors: GS Choi, HKT Trinh, EM Yang, YM Ye, YS Shin, SH Kim, HS Park
    Exp. Mol. Med., 2018-05-01;50(5):58.
    Species: Human
    Sample Types: Serum
  9. Plasma biomarkers are associated with agitation and regional brain atrophy in Alzheimer's disease
    Authors: JL Hsu, WJ Lee, YC Liao, JF Lirng, SJ Wang, JL Fuh
    Sci Rep, 2017-07-11;7(1):5035.
    Species: Human
    Sample Types: Plasma
  10. Novel panel of protein biomarkers to predict response to bortezomib-containing induction regimens in multiple myeloma patients
    Authors: KR Ting, M Henry, J Meiller, A Larkin, M Clynes, P Meleady, D Bazou, P Dowling, P O'Gorman
    BBA Clin, 2017-06-07;8(0):28-34.
    Species: Human
    Sample Types: Serum
  11. Nicotinamide Ameliorates Disease Phenotypes in a Human iPSC Model of Age-Related Macular Degeneration
    Authors: JS Saini, B Corneo, JD Miller, TR Kiehl, Q Wang, NC Boles, TA Blenkinsop, JH Stern, S Temple
    Cell Stem Cell, 2017-01-26;0(0):.
    Species: Human
    Sample Types: Cell Culture Supernates
  12. Increased IL6 plasma levels in indolent systemic mastocytosis patients are associated with high risk of disease progression.
    Authors: Mayado A, Teodosio C, Garcia-Montero A, Matito A, Rodriguez-Caballero A, Morgado J, Muniz C, Jara-Acevedo M, Alvarez-Twose I, Sanchez-Munoz L, Matarraz S, Caldas C, Munoz-Gonzalez J, Escribano L, Orfao A
    Leukemia, 2015-07-08;30(1):124-30.
    Species: Human
    Sample Types: Plasma
  13. Intracellular clusterin interacts with brain isoforms of the bridging integrator 1 and with the microtubule-associated protein Tau in Alzheimer's disease.
    Authors: Zhou Y, Hayashi I, Wong J, Tugusheva K, Renger J, Zerbinatti C
    PLoS ONE, 2014-07-22;9(7):e103187.
    Species: Human
    Sample Types: CSF
  14. Clusterin and complement activation in exfoliation glaucoma.
    Authors: Doudevski, Ivo, Rostagno, Agueda, Cowman, Mary, Liebmann, Jeffrey, Ritch, Robert, Ghiso, Jorge
    Invest Ophthalmol Vis Sci, 2014-04-17;55(4):2491-9.
    Species: Human
    Sample Types: Plasma
  15. Semen clusterin is a novel DC-SIGN ligand.
    Authors: Sabatte J, Faigle W, Ceballos A, Morelle W, Rodrígues CR, Lenicov FR, Thepaut M, Fieschi F, Malchiodi E, Fernandez M, Arenzana-Seisdedos F, Lortat-Jacob H, Michalski JC, Geffner J, Amigorena S
    J. Immunol., 2011-10-17;187(10):5299-309.
    Species: Human
    Sample Types: Seminal Plasma

FAQs

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Reviews for Human Clusterin Quantikine ELISA Kit

Average Rating: 3.7 (Based on 3 Reviews)

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Human Clusterin Quantikine ELISA Kit
By Anonymous on 04/21/2022
Sample Tested: Urine

Tested urine at 4-fold dilution. No observed matrix effect, but values were not stable plate to plate.
***Bio-Techne Response: Thank you for reviewing our product. We are sorry to hear that this product did not perform as expected. We have been in touch with the customer to resolve this issue according to our Product Guarantee and to the customer’s satisfaction.***

Human Clusterin Quantikine ELISA Kit DCLU00
Human Clusterin Quantikine ELISA Kit
By Anonymous on 11/10/2020
Sample Tested: putification steps

This kit was used to track purification of Clusterin from human plasma sourced material

Human Clusterin Quantikine ELISA Kit
By Anonymous on 11/27/2018
Sample Tested: Serum and Plasma