Human Beta-klotho(KLB) ELISA kit

Code CSB-EL012378HU
Size 96T,5×96T,10×96T
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Product Details

Target Name
klotho beta
Alternative Names
Beta-klotho ELISA Kit; BetaKlotho ELISA Kit; BKL ELISA Kit; KLB ELISA Kit; KLOTB_HUMAN ELISA Kit; Klotho beta like protein ELISA Kit; Klotho beta-like protein ELISA Kit
Abbreviation
KLB
Uniprot No.
Species
Homo sapiens (Human)
Sample Types
serum, plasma, tissue homogenates, cell lysates
Detection Range
62.5 pg/mL-4000 pg/mL
Sensitivity
15.6 pg/mL
Assay Time
1-5h
Sample Volume
50-100ul
Detection Wavelength
450 nm
Research Area
Metabolism
Assay Principle
quantitative
Measurement
Sandwich
Precision
Intra-assay Precision (Precision within an assay): CV%<8%
Three samples of known concentration were tested twenty times on one plate to assess.
Inter-assay Precision (Precision between assays): CV%<10%
Three samples of known concentration were tested in twenty assays to assess.
Linearity
To assess the linearity of the assay, samples were spiked with high concentrations of human KLB in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.
SampleSerum(n=4)
1:1Average %102
Range %96-105
1:2Average %88
Range %84-92
1:4Average %94
Range %89-98
1:8Average %92
Range %88-94
Recovery
The recovery of human KLB spiked to levels throughout the range of the assay in various matrices was evaluated. Samples were diluted prior to assay as directed in the Sample Preparation section.
Sample TypeAverage % RecoveryRange
Serum (n=5) 10296-106
EDTA plasma (n=4)8882-92
Typical Data
These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed.
pg/mlOD1OD2AverageCorrected
40002.372 2.278 2.325 2.223
20001.746 1.844 1.795 1.693
10001.396 1.293 1.345 1.243
5000.972 0.961 0.967 0.865
2500.588 0.576 0.582 0.480
1250.354 0.368 0.361 0.259
62.50.225 0.230 0.228 0.126
00.103 0.101 0.102
Troubleshooting
and FAQs
Storage
Store at 2-8°C. Please refer to protocol.
Lead Time
3-5 working days after you place the order, and it takes another 3-5 days for delivery via DHL or FedEx
Description

This Human KLB ELISA Kit was designed for the quantitative measurement of Human KLB protein in serum, plasma, tissue homogenates, cell lysates. It is a Sandwich ELISA kit, its detection range is 62.5 pg/mL-4000 pg/mL and the sensitivity is 15.6 pg/mL.

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Target Background

Function
(From Uniprot)
Contributes to the transcriptional repression of cholesterol 7-alpha-hydroxylase (CYP7A1), the rate-limiting enzyme in bile acid synthesis. Probably inactive as a glycosidase. Increases the ability of FGFR1 and FGFR4 to bind FGF21.
Gene References into Functions
  1. Knockdown of beta-Klotho produced the opposite effects. In conclusion, beta-Klotho inhibits EMT and plays a tumorsuppressive role in prostate cancer (PCa) , linking FGF/FGFR/beta-Klotho signaling to the regulation of PCa progression. PMID: 29749458
  2. crystal structures of free and ligand-bound beta-klotho extracellular regions that reveal the molecular mechanism that underlies the specificity of FGF21 towards beta-klotho and demonstrate how the FGFR is activated in a klotho-dependent manner PMID: 29342135
  3. the metabolic FGF21/KLB/FGFR1 pathway is involved in congenital hypogonadotropic hypogonadism (CHH) Genetic screening of 334 CHH patients identified seven heterozygous loss-of-function KLB mutations in 13 patients (4%). Most patients with KLB mutations (9/13) exhibited metabolic defects. PMID: 28754744
  4. We conducted a genome-wide association meta-analysis and replication study among >105,000 individuals of European ancestry and identified beta-Klotho (KLB) as a locus associated with alcohol consumption (rs11940694; P = 9.2 x 10(-12)). PMID: 27911795
  5. A high expression level of KLbeta, but not KLalpha, was an independent predictive factor of short progression free survival for non-muscle invasive bladder cancer PMID: 27573985
  6. Our results suggest that KLbeta plays important roles in tumor invasion and progression, and its concentration may be a valuable urinebased marker for the detection of bladder cancer. PMID: 27573985
  7. obesity appears as the predominant determinant of the abnormalities in FGF21 and FGF19 levels. Opposite changes in beta-Klotho expression in fat and liver indicate potential tissue-specific alterations in the responsiveness to endocrine FGFs in obesity PMID: 24813368
  8. ATF4 signaling pathway is essential for mediating the effect of ER stress on beta-klotho expression. PMID: 25727012
  9. Variants in genes involved in feedback regulation of bile acid synthesis (KLB, P=0.06 and FGFR4, P=0.09) were potentially associated with the irritable bowel syndrome-diarrhea subgroup with elevated serum C4. PMID: 25070056
  10. In-depth DNA sequencing identified additional genetic coding and noncoding variants in KLB that are associated with fecal bile acids excretion or colonic transit in Irritable bowel syndrome-diarrhea. PMID: 24200957
  11. betaKlotho suppresses tumor growth in hepatocellular carcinoma by regulating Akt/GSK-3beta/cyclin D1 signaling pathway. PMID: 23383245
  12. KLB and FGFR1 form a 1:1 heterocomplex independent of the galectin lattice that transitions to a 1:2 complex upon the addition of FGF21. PMID: 22523080
  13. KLB-silencing in Huh7 cells decreased cell proliferation and suppressed FGFR4 downstream signaling. PMID: 22439738
  14. Differential specificity of endocrine FGF19 and FGF21 to FGFR1 and FGFR4 in complex with KLB. PMID: 22442730
  15. Deletion of the D1 and the D1-D2 linker (the D1/linker region) from FGFR1c led to beta-Klotho-independent receptor activation by FGF21, suggesting that there may be a direct interaction between FGF21 and the D1/linker region-deficient FGFR1c. PMID: 22248288
  16. Polymorphism KLB rs4975017 may influence the colonic transit response to colesevelam in female patients with irritable bowel syndrome with diarrhea. PMID: 22271411
  17. Data suggest that KLB is an important regulator in the immortalization of HCECs by facilitating FGF19 growth factor signaling. PMID: 22020932
  18. Sulfated glycosaminoglycans are required for specific and sensitive fibroblast growth factor (FGF) 19 signaling via FGF receptor 4 and betaKlotho. PMID: 21653700
  19. A functional KLB gene variant mediating protein stability associates with colonic transit in irritable bowel syndrome with diarrhea. This association is modulated by 2 genetic variants in FGFR4. PMID: 21396369
  20. Metabolic regulator betaKlotho interacts with fibroblast growth factor receptor 4 (FGFR4) to induce apoptosis and inhibit tumor cell proliferation. PMID: 20657013
  21. The down-regulation of the renal klotho gene could increase renal damage induced by angiotensin II, while klotho gene induction could have therapeutic possibilities in treating angiotensin II-induced kidney damage. PMID: 16358222
  22. Liver-specific activities of FGF19 require Klotho beta. PMID: 17627937
  23. a functional FGF19 receptor may consist of FGF receptor (FGFR) and heparan sulfate complexed with either alphaKlotho or betaKlotho PMID: 17711860
  24. High expression of Klotho is associated with ovarian disease progression PMID: 18259951
  25. Both FGF23 and FGF21 require intact alpha or betaKlotho for signaling, respectively, whereas FGF19 can signal through a Klotho chimera consisting of the N terminus of alphaKlotho and the C terminus of betaKlotho. PMID: 18829467
  26. These data demonstrate that the C-terminus of FGF21 is critical for binding to beta-Klotho and the N-terminus is critical for fibroblast growth factor receptor (FGFR) activation. PMID: 19059246

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Subcellular Location
Cell membrane; Single-pass type III membrane protein.
Protein Families
Glycosyl hydrolase 1 family, Klotho subfamily
Database Links

HGNC: 15527

OMIM: 611135

KEGG: hsa:152831

STRING: 9606.ENSP00000257408

UniGene: Hs.90756

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