Ⅱ型膠原交聯(lián)羧基端肽(CTXII)檢測試劑盒(酶聯(lián)免疫吸附試驗(yàn)法)
ELISA Kit for Cross Linked C-Telopeptide Of Type II Collagen (CTXII)
CTX-II; CTX2
- 編號CEA686Eq
- 物種Equus caballus; Equine (Horse,馬) 相同的名稱,不同的物種。
- 實(shí)驗(yàn)方法競爭抑制
- 反應(yīng)時長2h
- 檢測范圍123.5-10,000pg/mL
- 靈敏度最小可檢測劑量小于等于48.3pg/mL.
- 樣本類型serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
- 下載 英文說明書 中文說明書
- 規(guī)格 48T96T 96T*5 96T*10 96T*100
- 價格 ¥ 3251 ¥ 4644 ¥ 20898 ¥ 39474 ¥ 325080
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特異性
本試劑盒用于檢測Ⅱ型膠原交聯(lián)羧基端肽(CTXII),經(jīng)檢測與其它相似物質(zhì)無明顯交叉反應(yīng)。
由于受到技術(shù)及樣本來源的限制,不可能完成對所有相關(guān)或相似物質(zhì)交叉反應(yīng)檢測,因此本試劑盒有可能與未經(jīng)檢測的其它物質(zhì)有交叉反應(yīng)。
回收率
分別于定值血清及血漿樣本中加入一定量的Ⅱ型膠原交聯(lián)羧基端肽(CTXII)(加標(biāo)樣品),重復(fù)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) | 99-105 | 102 |
EDTA plasma(n=5) | 87-101 | 93 |
heparin plasma(n=5) | 98-105 | 101 |
精密度
精密度用樣品測定值的變異系數(shù)CV表示。CV(%) = SD/mean×100
批內(nèi)差:取同批次試劑盒對低、中、高值定值樣本進(jìn)行定量檢測,每份樣本連續(xù)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(jìn)行定量測定,每個樣本使用同一試劑盒重復(fù)測定8次,分別計算不同濃度樣本的平均值及SD值。
批內(nèi)差: CV<10%
批間差: CV<12%
線性
在定值血清及血漿樣本內(nèi)加入適量的Ⅱ型膠原交聯(lián)羧基端肽(CTXII),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Ⅱ型膠原交聯(lián)羧基端肽(CTXII)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) | 93-101% | 87-95% | 78-103% | 82-102% |
EDTA plasma(n=5) | 97-104% | 94-105% | 83-97% | 80-103% |
heparin plasma(n=5) | 86-97% | 97-105% | 80-101% | 82-96% |
穩(wěn)定性
經(jīng)測定,試劑盒在有效期內(nèi)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(shí)驗(yàn)室的環(huán)境條件需盡量保持一致,尤其是實(shí)驗(yàn)室內(nèi)溫度、濕度及溫育條件。其次由同一實(shí)驗(yàn)員來進(jìn)行操作可減少人為誤差。
實(shí)驗(yàn)流程
1. 實(shí)驗(yàn)前標(biāo)準(zhǔn)品、試劑及樣本的準(zhǔn)備;
2. 加樣(標(biāo)準(zhǔn)品及樣本)50µL,
加入50µL檢測液A(臨用前配制);
37°C溫育1小時。
3. 洗板3次;
4. 加檢測溶液B100µL,37°C孵育30分鐘;
5. 洗板5次;
6. 加TMB底物90µL,37°C孵育10-20分鐘;
7. 加終止液50µL,立即450nm讀數(shù)。
實(shí)驗(yàn)原理
本試劑盒應(yīng)用競爭抑制酶聯(lián)免疫分析法測定標(biāo)本中待測物質(zhì)水平。將Ⅱ型膠原交聯(lián)羧基端肽(CTXII)單克隆抗體包被微孔板,制成固相載體,往包被抗體的微孔中同時加入生物素標(biāo)記的抗原和待測抗原(標(biāo)準(zhǔn)品或樣本),待測抗原與生物素標(biāo)記抗原對特異性抗體進(jìn)行競爭結(jié)合。溫育后經(jīng)洗滌去掉未結(jié)合物,然后加入HRP標(biāo)記的親和素,經(jīng)過溫育和徹底洗滌后加入底物TMB顯色。TMB在過氧化物酶的催化下轉(zhuǎn)化成藍(lán)色,并在酸的作用下轉(zhuǎn)化成最終的黃色。待測標(biāo)本濃度越高,標(biāo)記抗原和抗體的結(jié)合就越受到抑制,顯色愈淺。顯色的深淺與酶量呈正相關(guān),而與樣品中待測物質(zhì)含量呈負(fù)相關(guān)。用酶標(biāo)儀在450nm波長下測定吸光度(O.D.值),計算樣品濃度。
相關(guān)產(chǎn)品
編號 | 適用物種:Equus caballus; Equine (Horse,馬) | 應(yīng)用(僅供研究使用,不用于臨床診斷!) |
CEA686Eq | Ⅱ型膠原交聯(lián)羧基端肽(CTXII)檢測試劑盒(酶聯(lián)免疫吸附試驗(yàn)法) | Enzyme-linked immunosorbent assay for Antigen Detection. |
LMA686Eq | Ⅱ型膠原交聯(lián)羧基端肽(CTXII)等多因子檢測試劑盒(流式熒光發(fā)光法) | FLIA Kit for Antigen Detection. |
參考文獻(xiàn)
雜志 | 參考文獻(xiàn) |
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Advances in?Clinical?and Experimental?Medicine | Fibulin-3 and other cartilage metabolism biomarkers in relationship to calprotectin (MRP8/14) and disease activity in rheumatoid arthritis patients treated with?… [68362.pdf] |
Journal of Orthopaedic Surgery and Research | The levels of urine CTX-II, C2C, and PYD in children patients with Kashin-Beck disease in Qinghai Province of China [Pubmed: 30635000] |
Nutrients | The Preventive Effects of Greenshell Mussel (Perna canaliculus) on Early-Stage Metabolic Osteoarthritis in Rats with Diet-Induced Obesity [Pubmed: 31311115] |
International journal of molecular sciences | Differences in Osteoimmunological Biomarkers Predictive of Psoriatic Arthritis among a Large Italian Cohort of Psoriatic Patients [Pubmed: 31717649] |
Applied Physiology Nutrition and Metabolism | Effectiveness of collagen supplementation on pain scores in healthy individuals with self-reported knee pain; A randomized controlled trial [Pubmed: 31990581] |
heliyon | Oral intake of Streptococcus thermophilus improves knee osteoarthritis degeneration: A randomized, double-blind, placebo-controlled clinical study [] |
EBioMedicine | Repopulation of decellularised articular cartilage by laser-based matrix engraving [33483297] |
Biomolecules | Concerted Actions by PIICP, CTXII, and TNF-|á in Patients with Juvenile Idiopathic Arthritis [33924892] |