Mini Samples ELISA Kit for Alpha-1-Antitrypsin (a1AT)

SERPINA1; SPAAT; A1-AT; PI; Serpin Peptidase Inhibitor,Clade A(Alpha-1 Antiproteinase/AntiTrypsin)Member 1; Alpha-1 protease inhibitor; Short peptide from AAT; Serpin A1

Specificity

This assay has high sensitivity and excellent specificity for detection of Mini Samples Alpha-1-Antitrypsin (a1AT).
No significant cross-reactivity or interference between Mini Samples Alpha-1-Antitrypsin (a1AT) and analogues was observed.

Recovery

Matrices listed below were spiked with certain level of recombinant Mini Samples Alpha-1-Antitrypsin (a1AT) and the recovery rates were calculated by comparing the measured value to the expected amount of Mini Samples Alpha-1-Antitrypsin (a1AT) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 92-101 96
EDTA plasma(n=5) 88-102 96
heparin plasma(n=5) 96-105 101

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Mini Samples Alpha-1-Antitrypsin (a1AT) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Mini Samples Alpha-1-Antitrypsin (a1AT) 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 Mini Samples Alpha-1-Antitrypsin (a1AT) 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) 79-101% 94-103% 95-104% 83-103%
EDTA plasma(n=5) 98-105% 96-105% 97-104% 80-91%
heparin plasma(n=5) 99-105% 95-103% 79-105% 91-103%

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 1×60µL Assay Diluent A 1×6mL
Detection Reagent B 1×60µL Assay Diluent B 1×6mL
TMB Substrate 1×4.5mL Stop Solution 1×3mL
Wash Buffer (30 × concentrate) 1×10mL Instruction manual 1

Assay procedure summary

1. Prepare all reagents, samples and standards;
2. Add 25µL standard or sample to each well. Incubate 1 hour at 37°C;
3. Aspirate and add 25µL prepared Detection Reagent A. Incubate 1 hour at 37°C;
4. Aspirate and wash 3 times;
5. Add 25µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
6. Aspirate and wash 5 times;
7. Add 25µL Substrate Solution. Incubate 10-20 minutes at 37°C;
8. Add 20µL Stop Solution. Read at 450nm immediately.

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Magazine Citations
Journal of Biotechnology Expression and characterization of recombinant human alpha-antitrypsin in transgenic rice seed PubMed: 23376844
Sci Rep Hepatic steatosis depresses alpha-1-antitrypsin levels in human and rat acute pancreatitis PubMed: 26634430
PLoS One Gut Microbial Dysbiosis May Predict Diarrhea and Fatigue in Patients Undergoing Pelvic Cancer Radiotherapy: A Pilot Study PubMed: 25955845
Respir Care Diagnostic Utility of Biomarkers in COPD PubMed: 26106205
Acta Anaesthesiologica Scandinavica Early prognostic factors in septic shock cancer patients: a prospective study with a proteomic approach Pubmed:29315472
Journal of Clinical Medicine Urinary Proteomics for the Early Diagnosis of Diabetic Nephropathy in Taiwanese Patients Pubmed: 30486327
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