ELISA Kit for Thioredoxin (Trx)

TXN; ADF; SASP; TRDX; TRX1; ATL-derived factor; Surface-associated sulphydryl protein

Specificity

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

Recovery

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

Matrix Recovery range (%) Average(%)
serum(n=5) 82-102 88
EDTA plasma(n=5) 96-104 101
heparin plasma(n=5) 98-105 102

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Thioredoxin (Trx) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Thioredoxin (Trx) 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 Thioredoxin (Trx) 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) 98-105% 86-102% 89-98% 83-104%
EDTA plasma(n=5) 78-89% 92-101% 80-102% 83-92%
heparin plasma(n=5) 92-99% 88-102% 80-93% 98-105%

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
Human Reproduction The roles of thioredoxin and thioredoxin-binding protein-2 in endometriosis OxfordJournals: source
Exp Ther Med. Altered glutamate cysteine ligase activity in peripheral blood mononuclear cells from patients with systemic lupus erythematosus Pubmed:Pmc4061188
Reproduction Alteration in the intrafollicular thiol–redox system in infertile women with endometriosis Pubmed:25376627
Free Radical Research Thalassemia major patients using iron chelators showed a reduced plasma thioredoxin level and reduced thioredoxin reductase activity, despite elevated oxidative stress Pubmed:25564095
Antioxidants Comparison of the Pulmonary Oxidative Stress Caused by Intratracheal Instillation and Inhalation of NiO Nanoparticles when Equivalent Amounts of NiO Are Retained in the Lung. Pubmed:26797643
FASEB Journal Relationship between aortic wall oxidative stress/proteolytic enzyme expression and intraluminal thrombus thickness indicates a novel pathomechanism in the … Pubmed: 30351992
World Journal of Gastrointestinal Oncology Redox, immune and genetic biomarker system for personalized treatments in colorectal cancer Doi: 10.4251/wjgo.v11.i2.117
Nutrients The Beneficial Effects of Lactobacillus plantarum PS128 on High-Intensity, Exercise-Induced Oxidative Stress, Inflammation, and Performance in Triathletes Pubmed: 30736479
European Journal of Pharmacology Nilotinib enhances β-islets integrity and secretory functions in a rat model of STZ-induced diabetes mellitus Pubmed: 31351037
Journal of Clinical Medicine Damage-Associated Molecular Patterns and Th-Cell-Related Cytokines Released after Progressive Effort Pubmed: 32210109
HISTOCHEMISTRY AND CELL BIOLOGY Thioredoxin 1 is upregulated in the bone and bone marrow following experimental myocardial infarction: evidence for a remote organ response Pubmed: 33161477
Journal of Cosmetic Dermatology Examination of androgenetic alopecia with serum biomarkers Pubmed: 32969583
Heliyon Hepatoprotective Effect of Saccharomyces Cervisciae Cell Wall Extract against Thioacetamide-induced Liver Fibrosis in Rats 34159266
Hum Exp Toxicol Carvacrol hinders the progression of hepatic fibrosis via targeting autotaxin and thioredoxin in thioacetamide-induced liver fibrosis in rat 34155936
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