ELISA Kit for Ribonuclease A3 (RNASE3)

Rnase-A3; RnaseA3; ECP; RNS3; Ribonuclease,RNase A Family 3; Eosinophil Cationic Protein


This assay has high sensitivity and excellent specificity for detection of Ribonuclease A3 (RNASE3).
No significant cross-reactivity or interference between Ribonuclease A3 (RNASE3) and analogues was observed.


Matrices listed below were spiked with certain level of recombinant Ribonuclease A3 (RNASE3) and the recovery rates were calculated by comparing the measured value to the expected amount of Ribonuclease A3 (RNASE3) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 89-97 94
EDTA plasma(n=5) 94-101 98
heparin plasma(n=5) 84-92 87


Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Ribonuclease A3 (RNASE3) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Ribonuclease A3 (RNASE3) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%


The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Ribonuclease A3 (RNASE3) 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) 83-104% 91-98% 90-101% 78-105%
EDTA plasma(n=5) 79-91% 87-95% 80-95% 98-105%
heparin plasma(n=5) 84-93% 78-105% 96-105% 97-105%


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.



Magazine Citations
Journal of American Science Assessment of the Role of Serum and Urine Eosinophil Cationic Protein in Diagnosis of Wuchereria bancrofti Infection Jofamerican: source
Molecular Medicine Reports Intercellular adhesion molecule?1 expression in activated eosinophils is associated with mucosal remodeling in nasal polyps Pubmed:25573100
International Journal of Molecular Sciences The Human Host Defense Ribonucleases 1, 3 and 7 Are Elevated in Patients with Sepsis after Major Surgery—A Pilot Study Pubmed:26927088
annals of allergy asthma & immunology Interleukin 16 and CCL17/thymus and activation-regulated chemokine in patients with aspirin-exacerbated respiratory disease. pubmed:27986411
European Journal of Clinical Investigation Dying blood mononuclear cell secretome exerts antimicrobial activity. pubmed:27513763
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