Multiplex Assay Kit for Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay)

B-DF2; DEFB2; BD2; DEF-B2; HBD2; DEFB102; HBD-2; SAP1; DEFB4A; DEFB4; Skin-Antimicrobial Peptide 1

(Note: Up to 8-plex in one testing reaction)

Specificity

This assay has high sensitivity and excellent specificity for detection of Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay).
No significant cross-reactivity or interference between Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) and analogues was observed.

Recovery

Matrices listed below were spiked with certain level of recombinant Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) and the recovery rates were calculated by comparing the measured value to the expected amount of Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 82-93 87
EDTA plasma(n=5) 98-105 101
heparin plasma(n=5) 98-105 102
sodium citrate plasma(n=5) 79-94 85

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) 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 Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) 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) 79-96% 78-96% 83-93% 93-101%
EDTA plasma(n=5) 86-94% 86-101% 81-104% 81-98%
heparin plasma(n=5) 98-105% 80-94% 96-103% 87-96%
sodium citrate plasma(n=5) 94-101% 78-97% 91-102% 84-101%

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
96-well plate 1 Plate sealer for 96 wells 4
Pre-Mixed Standard 2 Standard Diluent 1×20mL
Pre-Mixed Magnetic beads (22#:DEFb2) 1 Analysis buffer 1×20mL
Pre-Mixed Detection Reagent A 1×120μL Assay Diluent A 1×12mL
Detection Reagent B (PE-SA) 1×120μL Assay Diluent B 1×12mL
Sheath Fluid 1×10mL Wash Buffer (30 × concentrate) 1×20mL
Instruction manual 1

Assay procedure summary

1. Preparation of standards, reagents and samples before the experiment;
2. Add 100μL standard or sample to each well,
    add 10μL magnetic beads, and incubate 90min at 37°C on shaker;
3. Remove liquid on magnetic frame, add 100μL prepared Detection Reagent A. Incubate 60min at 37°C on shaker;
4. Wash plate on magnetic frame for three times;
5. Add 100μL prepared Detection Reagent B, and incubate 30 min at 37°C on shaker;
6. Wash plate on magnetic frame for three times;
7. Add 100μL sheath solution, swirl for 2 minutes, read on the machine.

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Magazine Citations
Livestock Science The effect of Lactobacillus on the expression of porcine β-defensin-2 in the digestive tract of piglets ScienceDirect: S1871141311000126
Appl Environ Microbiol. Modulation of Porcine β-Defensins 1 and 2 upon Individual and Combined Fusarium Toxin Exposure in a Swine Jejunal Epithelial Cell Line Asm: Source
Plos Pathogens HIF-1α Is Essential for Effective PMN Bacterial Killing, Antimicrobial Peptide Production and Apoptosis in?Pseudomonas aeruginosa?Keratitis PubMed: PMC3715414
British Journal of Nutrition Identification of sociodemographic and clinical factors associated with the levels of human β-defensin-1 and human β-defensin-2 in the human milk of Han Chinese Pubmed: 24124699
University of Waikato The Assessment of Vitamin D, Antimicrobial Peptides and Procalcitonin in Bronchiectasis Waikato:Source
Vaccine On birth single dose live attenuated OPV and BCG vaccination induces gut cathelicidin LL37 responses at 6 week of age: A natural experiment Pubmed:25444792
International Journal of Dairy Technology Concentration characteristics of bovine β-defensin 1 and 2 in fresh bovine milk and infant formula Doi: 10.1111
Molecular Nutrition Food Research Green tea polyphenol epigallocatechin-3-gallate improves epithelial barrier function by inducing the productionof antimicrobial peptide pBD-1 and pBD-2 in monolayers of porcine intestinal epithelial IPEC-J2 cells. Pubmed:26991948
Respiratory Research Vitamin D and allergic airway disease shape the murine lung microbiome in a sex-specific manner. pubmed:27655266
Key Engineering Materials The Level of Inflammatory Cytokines and Antimicrobial Peptides after Composite Material Implantation and Contamination with Bacterial Culture. 16629795
Scientific Reports Measurements of AMPs in stratum corneum of atopic dermatitis and healthy skin–tape stripping technique Pubmed:29374283
Frontiers in Microbiology Swine-Derived Probiotic Lactobacillus plantarum Inhibits Growth and Adhesion of Enterotoxigenic Escherichia coli and Mediates Host Defense Pubmed:29997590
Journal of Dermatological Science Glyoxal-induced exacerbation of pruritus and dermatitis is associated with staphylococcus aureus colonization in the skin of a rat model of atopic dermatitis Pubmed:29496360
International Immunopharmacology Caprylic acid and nonanoic acid upregulate endogenous host defense peptides to enhance intestinal epithelial immunological barrier function via histone deacetylase … Pubmed: 30342347
拉脱维亚科学院院刊 Influence of Antibiotic-Impregnated Biomaterials on Inflammatory Cytokines
Veterinary Research Bovine fetal mesenchymal stem cells exert antiproliferative effect against mastitis causing pathogen Staphylococcus aureus Pubmed: 30975214
Journal of Immunology Research Damage-Associated Molecular Patterns and Myeloid-Derived Suppressor Cells in Bronchoalveolar Lavage Fluid in Chronic Obstructive Pulmonary Disease Patients
Veterinary Research Toll-like receptor 5-mediated IL-17C expression in intestinal epithelial cells enhances epithelial host defense against F4+ ETEC infection Pubmed: 31221216
Animals Fat Encapsulation Reduces Diarrhea in Piglets Partially by Repairing the Intestinal Barrier and Improving Fatty Acid Transport 33375218
Sci Rep Human beta defensin levels and vaginal microbiome composition in post-menopausal women diagnosed with lichen sclerosus 34362937
Medicine Regulatory T cells, damage-associated molecular patterns, and myeloid-derived suppressor cells in bronchoalveolar lavage fluid interlinked with chronic obstructive … Pubmed:35687771
Catalog No. Related products for research use of Sus scrofa; Porcine (Pig) Organism species Applications (RESEARCH USE ONLY!)
RPA072Po01 Recombinant Defensin Beta 2 (DEFb2) Positive Control; Immunogen; SDS-PAGE; WB.
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LMA072Po Multiplex Assay Kit for Defensin Beta 2 (DEFb2) ,etc. by FLIA (Flow Luminescence Immunoassay) FLIA Kit for Antigen Detection.