ELISA Kit for Amphiregulin (AREG)

AR; CRDGF; SDGF; Colorectum Cell-Derived Growth Factor; Schwannoma-Derived Growth Factor

Specificity

This assay has high sensitivity and excellent specificity for detection of Amphiregulin (AREG).
No significant cross-reactivity or interference between Amphiregulin (AREG) and analogues was observed.

Recovery

Matrices listed below were spiked with certain level of recombinant Amphiregulin (AREG) and the recovery rates were calculated by comparing the measured value to the expected amount of Amphiregulin (AREG) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 96-104 101
EDTA plasma(n=5) 93-101 98
heparin plasma(n=5) 80-96 81

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Amphiregulin (AREG) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Amphiregulin (AREG) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Amphiregulin (AREG) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample 1:2 1:4 1:8 1:16
serum(n=5) 82-98% 91-99% 78-94% 80-102%
EDTA plasma(n=5) 80-92% 84-101% 90-102% 81-96%
heparin plasma(n=5) 87-96% 83-98% 83-90% 93-101%

Stability

The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition.
To minimize extra influence on the performance, operation procedures and lab conditions, especially room temperature, air humidity, incubator temperature should be strictly controlled. It is also strongly suggested that the whole assay is performed by the same operator from the beginning to the end.

Reagents and materials provided

Reagents Quantity Reagents Quantity
Pre-coated, ready to use 96-well strip plate 1 Plate sealer for 96 wells 4
Standard 2 Standard Diluent 1×20mL
Detection Reagent A 1×120µL Assay Diluent A 1×12mL
Detection Reagent B 1×120µL Assay Diluent B 1×12mL
TMB Substrate 1×9mL Stop Solution 1×6mL
Wash Buffer (30 × concentrate) 1×20mL Instruction manual 1

Assay procedure summary

1. Prepare all reagents, samples and standards;
2. Add 100µL standard or sample to each well. Incubate 1 hours at 37°C;
3. Aspirate and add 100µL prepared Detection Reagent A. Incubate 1 hour at 37°C;
4. Aspirate and wash 3 times;
5. Add 100µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
6. Aspirate and wash 5 times;
7. Add 90µL Substrate Solution. Incubate 10-20 minutes at 37°C;
8. Add 50µL Stop Solution. Read at 450nm immediately.

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Magazine Citations
Onkologie Amphiregulin and Epiregulin Expression in Colorectal Carcinoma and the Correlation with Clinicopathological Characteristics Karger: 315380
Br J Cancer. Serum levels of hepatocyte growth factor and epiregulin are associated with the prognosis on anti-EGFR antibody treatment in KRAS wild-type metastatic colorectal cancer. Pubmed:24800946
Cancer Sci Association between serum ligands and the skin toxicity of anti-epidermal growth factor receptor antibody in metastatic colorectal cancer PubMed: 25707609
J Cancer Res Clin Oncol Amphiregulin confers trastuzumab resistance via AKT and ERK activation in HER2-positive breast cancer PubMed: 26195282
Oncotarget.  Serum level of hepatocyte growth factor is a novel marker of predicting theoutcome and resistance to the treatment with trastuzumab in HER2-positive patients with metastatic gastric cancer Pubmed:26716644
Acta Pharmacologica Sinica Anti-asthmatic activity of alkaloid compounds from Pericarpium Citri Reticulatae (Citrus reticulata 'Chachi') Pubmed: 19363516
International Journal of Biological Sciences CD9 regulates keratinocyte migration by negatively modulating the sheddase activity of ADAM17
Neoplasia Patient-derived xenograft (PDX) models of colorectal carcinoma (CRC) as a platform for chemosensitivity and biomarker analysis in personalized medicine Pubmed: 33212364
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE Polarization of ADAM17‐driven EGFR signalling in electric field‐guided collective migration of epidermal sheets Pubmed: 33164313
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