防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)
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
（注：單次混測多因子不超過8個指標 ）
- 編號LMA072Po
- 物種Sus scrofa; Porcine (Pig，豬) 相同的名稱，不同的物種。
- 實驗方法雙抗夾心
- 反應時長3.5h
- 檢測范圍3.91-4000pg/mL
- 靈敏度最小可檢測劑量小于等于1.303 pg/mL.
- 樣本類型Serum, plasma, tissue homogenates and other biological fluids
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產品包裝(模擬)
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產品包裝(模擬)
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通過ISO 9001、ISO 13485質量體系認證
特異性
本試劑盒用于檢測防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)，經檢測與其它相似物質無明顯交叉反應。
由于受到技術及樣本來源的限制，不可能完成對所有相關或相似物質交叉反應檢測，因此本試劑盒有可能與未經檢測的其它物質有交叉反應。
回收率
分別于定值血清及血漿樣本中加入一定量的防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)（加標樣品），重復測定并計算其均值，回收率為測定值與理論值的比率。
| 樣本 | 回收率范圍(%) | 平均回收率(%) |
| 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 |
精密度
精密度用樣品測定值的變異系數CV表示。CV(%) = SD/mean×100
批內差：取同批次試劑盒對低、中、高值定值樣本進行定量檢測,每份樣本連續測定20 次，分別計算不同濃度樣本的平均值及SD值。
批間差：選取3個不同批次的試劑盒分別對低、中、高值定值樣本進行定量測定，每個樣本使用同一試劑盒重復測定8次，分別計算不同濃度樣本的平均值及SD值。
批內差： CV<10%
批間差： CV<12%
線性
在定值血清及血漿樣本內加入適量的防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)，并倍比稀釋成1:2，1:4，1:8，1:16的待測樣本，線性范圍即為稀釋后樣本中防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)含量的測定值與理論值的比率。
| 樣本 | 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% |
穩定性
經測定，試劑盒在有效期內按推薦溫度保存，其活性降低率小于5%。
為減小外部因素對試劑盒破壞前后檢測值的影響，實驗室的環境條件需盡量保持一致，尤其是實驗室內溫度、濕度及溫育條件。其次由同一實驗員來進行操作可減少人為誤差。
實驗流程
1. 實驗前標準品、試劑及樣本準備；
2. 加樣（標準品、樣本、磁珠）標準品或樣本100μL及磁珠10μL，
37°C酶標板振蕩器孵育90分鐘；
3. 磁吸甩干，加檢測溶液A100μL，37°C酶標板振蕩器孵育60分鐘；
4. 磁吸洗板3次；
5. 加檢測溶液B100μL，37°C振動孵育30分鐘；
6. 磁吸洗板3次；
7. 加鞘液100μL，旋渦震蕩2分鐘后讀數。
實驗原理
將防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)抗體包被于磁珠，制成固相載體，向微孔中分別加入標準品或標本以及磁珠，其中的防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)與連接于固相載體上的抗體結合，然后加入生物素化的防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)抗體，將未結合的生物素化抗體洗凈后，加入PE標記的親和素，再次徹底洗滌后即可上機讀數。MFI值和樣品中的防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法)呈正相關。
贈品
增值服務
相關產品
| 編號 | 適用物種：Sus scrofa; Porcine (Pig，豬) | 應用(僅供研究使用，不用于臨床診斷！) |
| RPA072Po01 | 防御素β2(DEFb2)重組蛋白 | Positive Control; Immunogen; SDS-PAGE; WB. |
| PAA072Po01 | 防御素β2(DEFb2)多克隆抗體 | WB; IHC; ICC; IP. |
| MAA072Po21 | 防御素β2(DEFb2)單克隆抗體 | WB; IHC; ICC; IP. |
| SEA072Po | 防御素β2(DEFb2)檢測試劑盒(酶聯免疫吸附試驗法) | Enzyme-linked immunosorbent assay for Antigen Detection. |
| LMA072Po | 防御素β2(DEFb2)等多因子檢測試劑盒(流式熒光發光法) | FLIA Kit for Antigen Detection. |
參考文獻
| 雜志 | 參考文獻 |
| 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] |
| 拉脫維亞科學院院刊 | 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] |
