Human FGF-21 Quantikine ELISA Kit

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications ELISA
Conjugate
HRP

Order Details

Human FGF-21 Quantikine ELISA Kit Summary

Background
The Quantikine Human FGF-21 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human FGF-21 in cell culture supernates, serum, and plasma. It contains E. coli-expressed recombinant human FGF-21 and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human FGF-21 showed linear curves that were parallel to the standard curves obt...ained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring human FGF-21.
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Specificity
Natural and recombinant human FGF-21
Source
N/A
Assay Type
Solid Phase Sandwich ELISA
Inter-Assay
See PDF Datasheet for details
Intra-Assay
See PDF Datasheet for details
Spike Recovery
See PDF Datasheet for details
Sample Volume
See PDF Datasheet for details
Gene
FGF21

Applications/Dilutions

Dilutions
  • ELISA
Application Notes
No significant interference observed with available related molecules.
Publications
Read Publications using DF2100.

Packaging, Storage & Formulations

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

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Human FGF-21 Quantikine ELISA Kit

  • FGF21
  • FGF-21
  • fibroblast growth factor 21

Background

Fibroblast growth factor 21 (FGF-21) is a member of the FGF gene family, which contains 22 mammalian members. Based on its structure, it is further classified as a member of the FGF-19 subfamily, which also includes FGF-19 and FGF-23 (1-4). FGF family members contain a 120 amino acid (aa) core FGF domain that exhibits a beta -trefoil structure. FGF-19 subfamily members, unlike other FGFs, lack one strand of the beta -trefoil and bind poorly to extracellular matrix molecules such as heparin (3). They are consequently more diffusible than other FGFs and are considered endocrine rather than paracrine (1-4). All three subfamily members impact some aspect of metabolism; all three are induced by a nuclear receptor heterodimer that includes RXR (retinoid X receptor), and all three bind FGF receptors (FGF R) indirectly through co-receptors of the klotho family (5-9). FGF-21 binds to beta -Klotho via its C-terminal sequence. This binding, along with amino acids at the N-terminus, is required for signaling through FGF R (7, 8). FGF-21 is selective for FGF R1 isoform 1c, with varying reports of using isoforms 2c or 3c (10-12). Presence of the required klotho and FGF R family members determines tissue specificity of FGF-19 subfamily members, and thus concentrates FGF-21 activity within adipose tissue (3, 9-11). Mature human FGF-21 shares 81% aa sequence identity with mouse and rat FGF-21. 
FGF-21 is produced by hepatocytes in response to free fatty acid (FFA) stimulation of a PPAR alpha /RXR dimeric complex (4, 13-15). This situation occurs during starvation, diabetic ketosis, or following the ingestion of a high-fat/low-carbohydrate or ketogenic diet (5, 14-16). Upon FGF-21 secretion, white adipose tissue is induced to release FFAs from triglyceride stores. Once FFAs reach the hepatocytes, they are oxidized and reduced to acetyl-CoA (16). The acetyl-CoA is recombined into 4-carbon ketone bodies (acetoacetate and beta -hydroxybutyrate), released, and transported to peripheral tissues for energy generation (5, 15, 16). FGF-21 production is also induced upon differentiation of human or mouse fibroblasts to adipocytes (17, 18). In adipose tissue, FGF-21 induces glucose uptake by signaling in synergy with PPAR gamma to increase production of the glucose transporter, GLUT1 (10, 12, 19). 
FGF-21 production follows a circadian pattern in mice (20). It diffuses across the blood-brain barrier and this may facilitate induction of a state of torpor, or decreased activity, in response to increased FGF-21 (16, 21). These characteristics appear to induce a hibernation-like state during fasting and short days in winter (22). In diet-induced obese mice and mouse models of diabetes such as db/db and ob/ob, administration or transgenic overexpression of FGF-21 restores circulating glucose and triglyceride values to near normal and increases insulin sensitivity (5, 6, 14, 23, 24). In some of these states and in human obesity and type II diabetes, FGF-21 is already elevated prior to treatment, suggesting that resistance to FGF-21 is possible (17, 25, 26). Although FGF-21 administration corrects obesity in mice, it is unclear whether the same benefit would be seen in humans (2, 3, 17, 26-28).

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⚠ 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.

Publications for FGF-21 (DF2100)(55)

We have publications tested in 2 confirmed species: Human, Mouse.


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Human
(53)
Mouse
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Showing Publications 1 - 10 of 55. Show All 55 Publications.
Publications using DF2100 Applications Species
Liu, L;Ito, M;Sakai, S;Liu, J;Ohta, K;Saito, K;Nakashima, K;Satoh, S;Konno, A;Suzuki, T; FGF21 upregulation by hepatitis C virus via the eIF2?-ATF4 pathway: implications for interferon signaling suppression and TRIM31-mediated TSC degradation Frontiers in microbiology 2024-08-15 [PMID: 39211324] (Human) Human
Ribeiro, RV;Senior, AM;Simpson, SJ;Tan, J;Raubenheimer, D;Le Couteur, D;Macia, L;Holmes, A;Eberhard, J;O'Sullivan, J;Koay, YC;Kanjrawi, A;Yang, J;Kim, T;Gosby, A; Rapid benefits in older age from transition to whole food diet regardless of protein source or fat to carbohydrate ratio: Arandomised control trial Aging cell 2024-07-16 [PMID: 39011855] (Human) Human
Christidis, G;Küppers, F;Karatayli, SC;Karatayli, E;Weber, SN;Lammert, F;Krawczyk, M; Skin advanced glycation end-products as indicators of the metabolic profile in diabetes mellitus: correlations with glycemic control, liver phenotypes and metabolic biomarkers BMC endocrine disorders 2024-03-05 [PMID: 38443880] (Human) Human
Shchelochkov, OA;Farmer, CA;Chlebowski, C;Adedipe, D;Ferry, S;Manoli, I;Pass, A;McCoy, S;Van Ryzin, C;Sloan, J;Thurm, A;Venditti, CP; Intellectual disability and autism in propionic acidemia: a biomarker-behavioral investigation implicating dysregulated mitochondrial biology Molecular psychiatry 2024-01-11 [PMID: 38200289] (Human) Human
Biagi, F;Carlomagno, F;Carbone, M;Veralli, R;Vespasiani-Gentilucci, U;Riva, E;Manfrini, S;Tuccinardi, D;De Santis, A;Gnessi, L;Watanabe, M; Fibroblast Growth Factor 21 in Chronic Hepatitis C: A Potential Non-Invasive Biomarker of Liver Status upon Viral Eradication Metabolites 2023-10-30 [PMID: 37999215] (Human) Human
Goralska, J;Razny, U;Gruca, A;Zdzienicka, A;Micek, A;Dembinska-Kiec, A;Solnica, B;Malczewska-Malec, M; Plasma Cytokeratin-18 Fragment Level Reflects the Metabolic Phenotype in Obesity Biomolecules 2023-04-14 [PMID: 37189422] (Human) Human
JY Sun, LJ Du, XR Shi, YY Zhang, Y Liu, YL Wang, BY Chen, T Liu, H Zhu, Y Liu, CC Ruan, Z Gan, H Ying, Z Yin, PJ Gao, X Yan, RG Li, SZ Duan An IL-6/STAT3/MR/FGF21 axis mediates heart-liver cross-talk after myocardial infarction Science Advances, 2023-04-05;9(14):eade4110. 2023-04-05 [PMID: 37018396] (Human) Human
M Kim, H Zhang, T Kim, Y Mori, T Okura, K Tanaka, T Isobe, T Sakae, S Oh Novel Approach for Glycemic Management Incorporating Vibration Stimulation of Skeletal Muscle in Obesity International Journal of Environmental Research and Public Health, 2023-03-07;20(6):. 2023-03-07 [PMID: 36981616] (Human) Human
P Branco, R Calça, AR Martins, C Mateus, MJ Jervis, DP Gomes, S Azeredo-Lo, AF De Melo Ju, C Sousa, E Civantos, S Mas-Fontao, A Gaspar, S Ramos, J Morello, F Nolasco, A Rodrigues, SA Pereira Fibrosis of Peritoneal Membrane, Molecular Indicators of Aging and Frailty Unveil Vulnerable Patients in Long-Term Peritoneal Dialysis International Journal of Molecular Sciences, 2023-03-06;24(5):. 2023-03-06 [PMID: 36902451] (Human) Human
L Gu, W Jiang, W Jiang, Z Xu, W Li, H Zhang Elevated serum FGF21 levels predict heart failure during hospitalization of STEMI patients after emergency percutaneous coronary intervention PeerJ, 2023-02-06;11(0):e14855. 2023-02-06 [PMID: 36778154] (Human) Human
Show All 55 Publications.

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Bioinformatics

Gene Symbol FGF21