Human Ectonucleotide pyrophosphatase/phosphodiesterase family member 2(ENPP2) ELISA kit

Code CSB-EL007680HU
Size 96T,5×96T,10×96T
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Product Details

Target Name
ectonucleotide pyrophosphatase/phosphodiesterase 2
Alternative Names
ATX ELISA Kit; ATX X ELISA Kit; Autotaxin ELISA Kit; Autotaxin t ELISA Kit; E NPP 2 ELISA Kit; E-NPP 2 ELISA Kit; Ectonucleotide pyrophosphatase/phosphodiesterase 2 ELISA Kit; Ectonucleotide pyrophosphatase/phosphodiesterase family member 2 ELISA Kit; Enpp2 ELISA Kit; ENPP2_HUMAN ELISA Kit; Extracellular lysophospholipase D ELISA Kit; FLJ26803 ELISA Kit; LysoPLD ELISA Kit; NPP2 ELISA Kit; PD IALPHA ELISA Kit; PDNP2 ELISA Kit; Phosphodiesterase I alpha ELISA Kit; Phosphodiesterase I/nucleotide pyrophosphatase 2 ELISA Kit; Plasma lysophospholipase D ELISA Kit
Abbreviation
ENPP2
Uniprot No.
Species
Homo sapiens (Human)
Sample Types
serum, plasma, tissue homogenates
Detection Range
25 ng/mL-2000 ng/mL
Sensitivity
31.25 ng/mL
Assay Time
1-5h
Sample Volume
50-100ul
Detection Wavelength
450 nm
Research Area
Immunology
Assay Principle
quantitative
Measurement
Competitive
Precision
Intra-assay Precision (Precision within an assay): CV%<15%      
Three samples of known concentration were tested twenty times on one plate to assess.  
Inter-assay Precision (Precision between assays): CV%<15%      
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 ENPP2 in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.
  Sample Serum(n=4)  
1:1 Average % 89  
Range % 83-103  
1:2 Average % 96  
Range % 89-103  
1:4 Average % 90  
Range % 86-100  
1:8 Average % 89  
Range % 82-101  
Recovery
The recovery of human ENPP2 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 Type Average % Recovery Range  
Serum (n=5) 95 82-104  
EDTA plasma (n=4) 97 85-101  
             
             
Typical Data
These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed.
ng/ml OD1 OD2 Average    
2000 0.145 0.142 0.144    
750 0.270 0.283 0.277    
375 0.432 0.410 0.421    
125 0.571 0.592 0.582    
25 1.037 1.007 1.022    
0 2.432 2.411 2.422    
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

The product CSB-EL007680HU is a sandwich ELISA kit developed to measure concentrations of human ENPP2 in serum, plasma, or tissue homogenates. This assay uses the competitive technique in combination with the enzyme-substrate chromogenic reaction to quantify the analyte in the sample. The color develops negatively to the amount of ENPP2 in samples. The color intensity is measured at 450 nm via a microplate reader.

ENPP2, also known as autotaxin (ATX), is an enzyme present in blood circulation that is responsible for the conversion of lysophosphatidylcholine (LPC) to lysophosphatidic acid (LPA). LPA is a phospholipid mediator that elicits growth-factor-like responses in almost all cell types, including cell growth, survival, differentiation, and motility. ENPP2/LPA promotes several physiological and pathological processes, including in pulmonary fibrosis, thus serving as attractive drug targets. Increased ENPP2 expression has been detected in various types of cancer, including mammary, thyroid, hepatocellular, and renal cell carcinomas, non-small-cell lung cancer, as well as glioblastoma and neuroblastoma.

Citations

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Target Background

Function
(From Uniprot)
Hydrolyzes lysophospholipids to produce the signaling molecule lysophosphatidic acid (LPA) in extracellular fluids. Major substrate is lysophosphatidylcholine. Also can act on sphingosylphosphorylcholine producing sphingosine-1-phosphate, a modulator of cell motility. Can hydrolyze, in vitro, bis-pNPP, to some extent pNP-TMP, and barely ATP. Involved in several motility-related processes such as angiogenesis and neurite outgrowth. Acts as an angiogenic factor by stimulating migration of smooth muscle cells and microtubule formation. Stimulates migration of melanoma cells, probably via a pertussis toxin-sensitive G protein. May have a role in induction of parturition. Possible involvement in cell proliferation and adipose tissue development (Probable). Tumor cell motility-stimulating factor. Required for LPA production in activated platelets, cleaves the sn-1 lysophospholipids to generate sn-1 lysophosphatidic acids containing predominantly 18:2 and 20:4 fatty acids. Shows a preference for the sn-1 to the sn-2 isomer of 1-O-alkyl-sn-glycero-3-phosphocholine (lyso-PAF).
Gene References into Functions
  1. These results suggest functional interactions among ATX, VEGFR-2, and VEGFR-3 in the modulation of hemovascular and lymphovascular cell activation during vascular development. PMID: 30456868
  2. LPAR mRNA and ATX protein levels are anatomic site-dependent in high-grade serous carcinoma and the former are informative of disease outcome. PMID: 30032361
  3. Study revealed that serum total ATX and ATX isoforms were significantly associated with the clinical stages of female subjects with melanoma. PMID: 29500864
  4. Serum ATX levels may at least partially reflect histological severity in non-alcoholic fatty liver disease. PMID: 29568204
  5. ATX-LPA axis facilitates estrogen-induced endometrial cancer cell proliferation via MAPK/ERK signaling pathway. PMID: 29328374
  6. Significant suppression of these aforementioned changes was observed after ATX/LPA-receptor/ROCK inhibition as well as suppression of fibrotic changes and MLC and cofilin phosphorylation in HTM cells. PMID: 29305605
  7. Autotaxin levels were significantly higher in early-onset preeclampsia group compared with late-onset preeclampsia group. Autotaxin levels were found to be significantly higher in preeclamptic patients compared with control group. Serum autotaxin levels showed a significant positive correlation with maternal systolic, diastolic blood pressures and uric acid levels. PMID: 29058512
  8. Results demonstrated, for the first time, that increased serum ATX activity and protein levels are associated with several aspects of quality of life in cholestatic patients as well as with markers of cholestatic liver injury and higher risks of death and transplantation. The study provides novel clinical evidence of the pruritogenic role of the ATX/lysophosphatidic acid axis in the pathogenesis of cholestatic itch. PMID: 27506882
  9. ENPP2 silencing increased HBV replication approximately 2.3-fold by enhancing, via the type I IFN signaling pathway, HBV cccDNA (covalently closed circular DNA) translation into viral RNA. PMID: 29414802
  10. This study demonstrated that Autotaxin is Related to Metabolic Dysfunction and Predicts Alzheimer's Disease Outcomes. PMID: 27911319
  11. Structural and functional studies have revealed what makes ATX a unique lysoPLD, and how secreted ATX binds to its target cells. The ATX catalytic domain shows a characteristic bimetallic active site followed by a shallow binding groove that can accommodate nucleotides as well as the glycerol moiety of lysophospholipids, and by a deep lipid-binding pocket. PMID: 24548887
  12. We conclude that an ATM-ATX axis interconnects double-strand breaks with silica-induced inflammation and propagates these effects in epithelial cells PMID: 28968864
  13. we present a new crystal structure of ATX in complex with orthovanadate (ATX-VO5), which binds the Ogamma nucleophile of Thr209 and adopts a trigonal bipyramidal conformation, following the nucleophile attack onto the substrate.We propose that ATX follows the associative two-step in-line displacement mechanism. PMID: 27268273
  14. The effects of gamma radiation on mRNA levels of autotaxin and 14 inflammatory mediators in adipose tissue and the consequences for radiation therapy and chemotherapy are discussed. PMID: 28539367
  15. These findings suggest that the promoter hypomethylation and overexpression of ATX might play a contributory role in the pathogenesis of liver fibrosis in biliary atresia. PMID: 28052132
  16. LPA2 mRNA levels were associated with poorer differentiation, and higher LPA6 levels were associated with microvascular invasion in HCC; both became a risk factor for recurrence after surgical treatment when combined with increased serum ATX levels PMID: 27583415
  17. AKT signaling played a role in ATX secretion regulation to facilitate ATX ER export by enhancing the nuclear factor of activated T cell-mediated p23 (Sec24C) expression PMID: 28298439
  18. Expression of both ATX and IL-6 was increased in systemic scleroderma (SSc) skin, and lysophosphatidic acid-induced IL-6 levels and IL-6-induced ATX levels were increased in fibroblasts from SSc patients compared with controls. PMID: 27390295
  19. Elevated levels of autotaxin and soluble markers of immune activation during HCV infection. PMID: 27540113
  20. These results suggest that the post-transcriptional regulation of ATX expression by HuR and AUF1 modulates cancer cell migration. PMID: 27784781
  21. ATX is highly expressed in renal cell carcinoma and bladder carcinoma. PMID: 27757783
  22. With a deeper understanding of the critical role of the autotaxin/lysophosphatidate axis in pancreatic cancer, targeting autotaxin or lysophosphatidate receptor may be a potential and promising strategy for cancer therapy. PMID: 28347252
  23. Plasma ATX activity is strongly associated with pruritus in primary biliary cholangitis, authors review the biochemistry of ATX and the rationale for its role in pruritus. [Review] PMID: 27019050
  24. Data suggest serum ATX levels correlate with presence/intensity of pruritus in pediatric cholestatic disorders; despite therapy, ATX is up-regulated in children with severe pruritus due to cholestatic disorders (AGS, Alagille syndrome; BA, biliary atresia; progressive familial intrahepatic cholestasis) compared to children with cholestatic disorders without pruritus (BASD, bile acid synthesis defects). [PILOT PROJECT] PMID: 26628447
  25. These findings support our previous work showing reduced ATX antigen levels in the peripheral blood of pre-eclamptic women. A disturbance in placental ATX production may be linked to poor placental development and systemic maternal symptoms in early-onset pre-eclampsia. PMID: 26111716
  26. These results suggest that autotaxin-LPA-LPA receptor 1-AKT1 signaling axis is critical for maintaining Cancer stem cells(CSC) characteristics through an autocrine loop and provide a novel therapeutic target for ovarian CSCs. PMID: 26800320
  27. autotaxin (ATX), is an ecto-lysophospholipase D encoded by the human ENNP2 gene PMID: 25977291
  28. Altered expression of ENPP2 is associated with various diseases, such as, inflammation, cancer, fibrosis, rheumatoid arthritis and neural tube defects. (Review) PMID: 26391552
  29. Serum ATX correlates with and predicts measures of glucose homeostasis and insulin sensitivity in older humans, suggesting that it may be a potential pathogenic factor and/or diagnostic/therapeutic target for insulin resistance in this population PMID: 26727116
  30. ATX was induced in monocytic THP-1 cells by TLR4 ligand lipopolysaccharide (LPS), TLR9 ligand CpG oligonucleotide, and TLR3 ligand poly(I:C), respectively PMID: 26313906
  31. Autotaxin is an inflammatory mediator and therapeutic target in thyroid cancer PMID: 26037280
  32. The results are discussed in terms of ATX regulation in wound healing and cancer.We, therefore, demonstrate the concept that accumulation of LPA in the circulation decreases ATX production PMID: 25896349
  33. Increased serum autotaxin activity represents a highly sensitive, specific and robust diagnostic marker of Intrahepatic cholestasis of pregnancy , distinguishing ICP from other pruritic disorders of pregnancy and pregnancy-related liver diseases. PMID: 25450205
  34. blocking tumor-driven inflammation by ATX inhibition is effective in decreasing tumor growth in breast cancers where the cancer cells express negligible ATX. PMID: 26071407
  35. Autotaxin is transported in the aortic valve by lipoprotein(a) and is also secreted by valve interstitial cells. PMID: 26224810
  36. Data suggest a role for the autotaxin-lysophosphatidic acid axis in toluene diisocyanate toxicity. PMID: 26072274
  37. Elevated serum autotaxin was correlated with hepatic dysfunction in biliary atresia. PMID: 25536867
  38. In humans, ENPP2 expression in subcutaneous fat and ENPP2 levels in serum were reduced in obese subjects. PMID: 24969110
  39. Exogenous ATX controls breast cancer cell proliferation, invasion, and endothelial cell transmigration via interaction tumor integrin alphaVbeta3. PMID: 25277122
  40. increase in serum ATX levels in HCC patients may not be caused by abundant ATX production in HCC tissues but by fibrosis in the background livers PMID: 24642343
  41. The circulating level of lysophosphatidic acid in a systemic atopic dermatitis model, with severe scratching was probably because of the increased lysophospholipase D activity of autotaxin (ATX) in the blood rather than in plasma. PMID: 24641902
  42. potential biomarker for atopic dermatitis PMID: 24582488
  43. high levels of c-Jun enhance motility in part by driving the expression of ENPP2/Autotaxin PMID: 24852265
  44. The present review provides an overview of the ATX-LPA signalling axis and collates current knowledge regarding its specific role in breast cancer. PMID: 25195735
  45. Data indicate that inhibition of autotaxin (ATX) significantly reduced T cell migration. PMID: 24935929
  46. autotaxin-mediated disease processes PMID: 24560789
  47. The results of this study showed that ATX activity was significantly higher (p value<0.0001) in MS patients than those patients diagnosed with neurological disease. PMID: 24984830
  48. ATX expression is up-regulated in obese patients and mice in relationship with insulin resistance and impaired glucose tolerance. [Review] PMID: 23639740
  49. Endothelial ATX acts through lysophosphatidic acid signaling to promote renal tumorigenesis and is functionally involved in the acquired resistance to sunitinib. PMID: 24122794
  50. Downregulation of human ATX inhibits the growth of human gastric cancer xenografts in nude mice. PMID: 23258351

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Subcellular Location
Secreted.
Protein Families
Nucleotide pyrophosphatase/phosphodiesterase family
Tissue Specificity
Detected in blood plasma (at protein level). Predominantly expressed in brain, placenta, ovary, and small intestine. Expressed in a number of carcinomas such as hepatocellular and prostate carcinoma, neuroblastoma and non-small-cell lung cancer. Expressed
Database Links

HGNC: 3357

OMIM: 601060

KEGG: hsa:5168

UniGene: Hs.190977

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