BIOMEDICA新品:
中文名稱:人可溶性信號素 4D 檢測試劑盒(酶聯免疫法)
英文名稱:Soluble Semaphorin4D ELISA
定量測定人血漿中具有生物活性的信號素4D。
產品特征:
1. 品質保證:在臨床試驗中歷經嚴格的驗證和質量控制;
2. 高特異性:抗體和試劑高特異性;
3. 可重現性:可溶性非脫落信號素4D 特異性分析;
4. 可靠性:7個標準品,2個質控品,讓你獲取可靠的生物數據;
5. 較少樣本量:只需10μl;
6. 專利產品:自主研發與生產。
背景知識:
1. 信號素4D參與骨細胞功能體系調節骨代謝,被認為是骨形成過程的重要抑制蛋白[1-2],與其特定受體叢狀蛋白B1(Plexin-B1)結合, 在抑制骨細胞功能, 阻滯骨形成的信號轉導通路過程中起著重要的作用[3]。
2. Plexin-B1是Sema4D的高親和力受體, 可介導Sema4D在神經發育、血管新生、骨吸收等方面的作用。
3. 血清中Sema4D和Plexin-B1的下降直接減緩對其信號通路的抑制作用, 進而促進前成骨細胞向成骨細胞轉化,成骨細胞功能增加, 數量增多,骨代謝表現為高骨轉化狀態。
試劑盒信息:
貨號 | BI-20405 |
方法學 | 夾心ELISA, HRP/TMB, 12x8人份測試 |
樣本類型 | 血漿(EDTA, 肝素,枸櫞酸鈉) |
標準品范圍 | 0-2,000 pmol/l (7個標準品) |
標準品 | 0/62.5/125/250/500/1,000/2,000 pmol/l |
質控品 | 2 個 |
樣本量 | 10 μl /測試 |
孵育時間 | 3 h / 1 h / 30 min |
單位換算 | 1 pg/ml = 0.00127 pmol/l (MW: 78.9 kDa) |
靈敏度 | LOD: 12 pmol/l (0 pmol/l + 3 SD); LLOQ: 31 pmol/l |
精密度 | 批內差(n=5) ≤ 8%, 批間差(n=11) ≤ 11% |
回收率 | EDTA 血漿:92%. 肝素血漿:103%.枸櫞酸鈉血漿:83%. |
健康人群參考范圍 | Median (EDTA plasma, n=44): 245 pmol/l. 推薦建立實驗室自己的參考范圍。 |
參考文獻:
1. Semaphorinscommand cells to move. Kruger RP et al., Nature Rev Mol Cell Biol, 2005; 6:789-800.
2. The semaphorins. YazdaniU and TermanJR, Genome Biol, 2006; 7(3): 211.
3. Biology and function of neuroimmunesemaphorins4A and 4D. Nkyimbeng-TakwiEH and ChapovalSP, ImmunolRes, 2011; 50 (1):10-21.
4. Structural basis of semaphorin-plexinsignallingB.J.C. Janssen BJC et al., Nature, 2010; 467:1118-1122.
5. Semaphorinsand their receptors in immune cell interactions. Suzuki K et al., Nature Immunology, 2007;9:17-23.
6. Sema4D induces angiogenesis through Met recruitment by PlexinB1. ConrottoP et al., Blood, 2005; 105:4321-4329.
7. Diverse roles for semaphorin-plexinsignaling in the immune system. Takamatsu H et al., Trends Immunol, 2012; 33(3):127-135.
8. Bone cell communication factors and Semaphorins. Negishi-Koga T and TakayanagiH, BonekeyRep, 2012; 1:183.
9. Suppression of bone formation by osteoclasticexpression of semaphorin4D. Negishi-Koga T et al., Nat Med, 2011; 17(11):1473-1480.
10. Soluble SEMA4D/CD100: A novel immunoregulatorin infectious and inflammatory diseases. MalekiKT et al., Clinical Immunology, 2016; 163:52-59.
11. Anabolic bone formation via a site specific bone targeting delivery system by interfering with semaphorin4D expression. Zhang Y et al., J Bone Miner Res, 2015; 30(2): 286-296.
12. Generation and preclinical characterization of an antibody specific for SEMA4D. Fisher TL et al., Mabs, 2016; 8(1):150-162.
13. Coagulation-induced elevated sSEMA4D concentrations in human serum versus plasma measured by sandwich ELISA. Laberet al., 2018; submitted.