環(huán)磷酸鳥苷(cGMP)檢測試劑盒(酶聯(lián)免疫吸附試驗法)
特異性
本試劑盒用于檢測環(huán)磷酸鳥苷(cGMP),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環(huán)磷酸鳥苷(cGMP)(加標樣品),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) | 82-98 | 91 |
EDTA plasma(n=5) | 94-102 | 99 |
heparin plasma(n=5) | 86-98 | 92 |
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)加入適量的環(huán)磷酸鳥苷(cGMP),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環(huán)磷酸鳥苷(cGMP)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) | 79-102% | 80-96% | 96-103% | 93-101% |
EDTA plasma(n=5) | 79-96% | 90-103% | 85-101% | 78-91% |
heparin plasma(n=5) | 80-98% | 94-105% | 86-94% | 95-102% |
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,實驗室的環(huán)境條件需盡量保持一致,尤其是實驗室內(nèi)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、試劑及樣本的準備;
2. 加樣(標準品及樣本)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)。
實驗原理
本試劑盒應(yīng)用競爭抑制酶聯(lián)免疫分析法測定標本中待測物質(zhì)水平。將環(huán)磷酸鳥苷(cGMP)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su標記的抗原和待測抗原(標準品或樣本),待測抗原與生物su標記抗原對特異性抗體進行競爭結(jié)合。溫育后經(jīng)洗滌去掉未結(jié)合物,然后加入HRP標記的親和素,經(jīng)過溫育和洗滌后加入底物TMB顯色。TMB在過氧化物酶的催化下轉(zhuǎn)化成藍色,并在酸的作用下轉(zhuǎn)化成最終的黃色。待測標本濃度越高,標記抗原和抗體的結(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)含量呈負相關(guān)。用酶標儀在450nm波長下測定吸光度(O.D.值),計算樣品濃度。
參考文獻
雜志 | 參考文獻 |
Life Sci | Cardioprotective effects of baicalein on heart failure via modulation of Ca2 [PubMed: 26706290] |
Life Sci | Cardioprotective effects of baicalein on heart failure via modulation of Ca(2+) handling proteins in vivo and in vitro [Pubmed:26706290] |
Taylor & Francis | Influences of Hyriopsis cumingii polysaccharides on mice immunosignaling molecules and T lymphocyte differentiation [09540105.2017.1306494] |
Biochemical and Biophysical Research Communications | Probucol improves erectile function via Activation of Nrf2 and coordinates the HO-1/DDAH/PPAR-γ/eNOS pathways in streptozotocin-induced diabetic rats [Pubmed: 30454888] |
International Journal of Peptide Research and Therapeutics | ANP/NPRA Inhibits Epithelial-Mesenchymal Transition of Airway by Targeting Smad3 in Asthma [] |
Evidence-Based Complementary and Alternative Medicine | iTRAQ-Based Proteomics to Reveal the Mechanism of Hypothalamus in Kidney-Yin Deficiency Rats Induced by Levothyroxine [] |
Experimental Lung Research | Atrial natriuretic peptide inhibits epithelial-mesenchymal transition (EMT) of bronchial epithelial cells through cGMP/PKG signaling by targeting Smad3 in a murine … [Pubmed: 31496319] |
Neuroscience Letters | Effect of cGMP-activated aquaporin 1 on TRPV4 in rats with allodynia induced by chronic compression of the dorsal root ganglion [Pubmed: 31790718] |
Aging Male | Effect of tadalafil on penile nitric oxide synthase and corporal smooth muscle in rats under dutasteride treatment [Pubmed: 32160825] |
Biomaterials | Epigallocatechin gallate mediated sandwich-like coating for mimicking endothelium with sustained therapeutic nitric oxide generation and heparin release [Pubmed: 33143876] |
Biomed Pharmacother | Antihypertensive effects of allicin on spontaneously hypertensive rats via vasorelaxation and hydrogen sulfide mechanisms [Pubmed: 32480217] |
Pflügers Archiv : European journal of physiology | The role of adrenergic and muscarinic receptors in stress-induced cardiac injury [34245378] |
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