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  4. Human Cystatin-B (CSTB/CST6/STFB) ELISA kit

Human Cystatin-B (CSTB/CST6/STFB) ELISA kit

  • 中文名称：
    人胱抑素B(CSTB/CST6/STFB)酶联免疫试剂盒
  • 货号：
    CSB-E16835h
  • 规格：
    96T/48T
  • 价格：
    ￥3600/￥2500
  • 其他：

产品详情

  • 产品描述：
        CSTB是一种半胱氨酸蛋白酶抑制剂，主要在脑部神经元和其他组织中发现。CSTB与许多神经疾病的发病机制有关，如癫痫和阿尔茨海默病等。CSTB还可以影响细胞凋亡和炎症反应等方面的生物学过程。
        j9九游会登录入口首页生物所提供的Human Cystatin-B (CSTB/CST6/STFB) ELISA kit属于ELISA检测试剂盒，采用双抗夹心法定量检测人血清、血浆、细胞培养上清、尿液、唾液、组织匀浆、细胞裂解液样本中的CSTB，其灵敏度为0.233 ng/mL，检测范围为0.313 ng/mL-20 ng/mL。
     
  • 别名：
    CHROW21 ELISA Kit; CPI B ELISA Kit; CPI-B ELISA Kit; CST 6 ELISA Kit; CST6 ELISA Kit; CSTB ELISA Kit; Cystatin B (stefin B) ELISA Kit; Cystatin B ELISA Kit; Cystatin-B ELISA Kit; CYTB ELISA Kit; CYTB_HUMAN ELISA Kit; EPM1 ELISA Kit; EPM1A ELISA Kit; Liver thiol proteinase inhibitor ELISA Kit; PME ELISA Kit; Stefin-B ELISA Kit; STF B ELISA Kit; STFB ELISA Kit; ULD ELISA Kit
  • 缩写：
    CSTB
  • Uniprot No.：
  • 种属：
    Homo sapiens (Human)
  • 样本类型：
    serum, plasma, cell culture supernates, urine, saliva, tissue homogenates, cell lysates
  • 检测范围：
    0.313 ng/mL-20 ng/mL
  • 灵敏度：
    0.233 ng/mL
  • 反应时间：
    1-5h
  • 样本体积：
    50-100ul
  • 检测波长：
    450 nm
  • 研究领域：
    Others
  • 测定原理：
    quantitative
  • 测定方法：
    Sandwich
  • 精密度：
    Intra-assay Precision (Precision within an assay): CV%<8%        
    Three samples of known concentration were tested twenty times on one plate to assess.    
    Inter-assay Precision (Precision between assays): CV%<10%        
    Three samples of known concentration were tested in twenty assays to assess.      
                   
  • 线性度：
    To assess the linearity of the assay, samples were spiked with high concentrations of human CSTB/CST6/STFB in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.  
    　 Sample Serum(n=4)    
    1:1 Average % 104    
    Range % 101-106    
    1:2 Average % 91    
    Range % 88-97    
    1:4 Average % 96    
    Range % 91-104    
    1:8 Average % 89    
    Range % 84-94    
  • 回收率：
    The recovery of human CSTB/CST6/STFB spiked to levels throughout the range of the assay in various matrices was evaluated. Samples were diluted prior to assay as directed in the Sample Preparation section.  
     
    Sample Type Average % Recovery Range    
    Serum (n=5) 104 99-108    
    EDTA plasma (n=4) 98 93-105    
                   
                   
  • 标准曲线：
    These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed.  
     
    ng/ml OD1 OD2 Average Corrected    
    20 2.411 2.588 2.500 2.340    
    10 1.702 1.811 1.757 1.597    
    5 1.166 1.163 1.165 1.005    
    2.5 0.654 0.699 0.677 0.517    
    1.25 0.423 0.411 0.417 0.257    
    0.625 0.266 0.255 0.261 0.101    
    0.313 0.203 0.211 0.207 0.047    
    0 0.155 0.164 0.160 　    
  • 数据处理：
  • 货期：
    3-5 working days

产品评价

靶点详情

  • 最新研究进展：
    CSTB是一种半胱氨酸蛋白酶抑制剂，主要在神经系统中发挥作用，调节神经元的生长和存活。最近的研究表明，CSTB还可以通过抑制胰岛素受体信号通路来影响胰岛素的信号转导，从而调节血糖代谢和胰岛素抵抗。
     
  • 功能：
    This is an intracellular thiol proteinase inhibitor. Tightly binding reversible inhibitor of cathepsins L, H and B.
  • 基因功能参考文献：
    1. cystatin B expression was significantly and inversely correlated with lung tumor stage and tumor grade PMID: 29037838
    2. The results demonstrate that cystatin B interferes with the STAT-1 signaling and IFN-beta-antiviral responses perpetuating HIV in macrophage reservoirs. PMID: 27137788
    3. apoptosis is accompanied by degradation of the cysteine cathepsin inhibitor stefin B (StfB). CatD did not exhibit a crucial role in this step. However, this degradation was partially prevented through pre-incubation with the antioxidant N-acetyl cysteine PMID: 28543404
    4. Homozygous for a c.218dupT (p.His75Serfs*2) mutation in exon 3 of CSTB causes neurodegeneration, progressive cerebral volume loss and diffuse hypomyelination. PMID: 28378817
    5. CSTB downregulation may promote the development of gastric cancer. PMID: 28281969
    6. It was shown that decreased expression of cystatin B enhances cathepsin activity in Niemann-Pick C cerebellar degeneration patient fibroblasts. PMID: 26908626
    7. High expression of stefin B may be an important factor contributing to the development and metastasis of Hepatocellular Carcinoma. PMID: 26753874
    8. CSTB null mutation associated with microcephaly, early developmental delay, and severe dyskinesia. PMID: 26843564
    9. Data shows that CYTB and ANXA4 overexpression may be involved in carcinogenesis and histopathological differentiation of ovarian clear cell carcinoma and suggest they may serve as a potential diagnostic biomarkers. PMID: 25633807
    10. A role for disease-causing mutations in cystatin B gene in patients with juvenile myoclonic epilepsy was not supported. PMID: 25752200
    11. Even though the majority of EPM1 patients have a uniform genetic mutation, the actual size of the longer CSTB expansion mutation allele is likely to have a modulating effect on the age at disease onset, myoclonus severity, and cortical neurophysiology. PMID: 25770194
    12. The study shows detection of stefin B dimers in HEK293 cells and the importance of their residual activity. PMID: 25047918
    13. glutamate dehydrogenase is a euchromatin-associated enzyme, and its H3 clipping activity is regulated by chromatin structure, histone modifications and an in vivo inhibitor. PMID: 25263734
    14. detected a homozygous expansion of dodecamer repeats in the CSTB gene in four patients with clinical diagnosis of ULD. PMID: 23883076
    15. The increased CSTB expression in ovarian tissue represents tumor progression and is dysregulated by the TGF-beta signaling pathway. PMID: 24452274
    16. A reciprocal influence of CSTB and SOD1 at the gene expression level and for a direct interaction of the two proteins, is reported. PMID: 24234043
    17. The present study was performed on two more missense mutants of human stefin B, G50E and Q71P, and they similarly showed numerous aggregates upon overexpression. PMID: 24909779
    18. The co-localization of stefin B wild type and EPM1 mutants with cathepsins showed that cathepsins accumulate around the aggregates formed by the EPM1 mutants. PMID: 23362198
    19. Skull thickening and an increased prevalence of abnormal findings in skeletal radiographs of patients with EPM1 suggest that this condition is connected to defective cystatin B function. PMID: 23010349
    20. This study suggested that CSTB mutations other than the common dodecamer expansion predict particular phenotypes, including marked seizure severity and polymorphous seizure types. PMID: 23205931
    21. Elevated StefA mRNA level is associated with invasive glioblastoma. PMID: 22287159
    22. S-glutathionylation and S-cysteinylation were described as extensive PTM of a salivary protein and the first time that these PTMs were detected in naturally occurring cystatin B. PMID: 22057043
    23. patients compound heterozygous for the dodecamer repeat expansion and the c.202C>T mutations seem to have a severer form of Unverricht-Lundborg disease (EPM1) than patients homozygous for the expansion mutation PMID: 21757863
    24. At pH 7.0 the mutant H75W folded in three kinetic phases to a native-like intermediate, analogous to folding of stefin B at pH 4.8. PMID: 22033403
    25. Intracellular stefin b aggregation shows a negative correlation with cell survival PMID: 20078424
    26. Stefin B interacts with histones and cathepsin L in the nucleus PMID: 20075068
    27. oligomers of stefin B and amyloid-beta interact in vitro and in cells PMID: 19955183
    28. Oligonucleotides containing EPM1 repeat adopt secondary structures that may facilitate strand slippage thereby causing the expansion. PMID: 11697734
    29. Intramolecular i-motif structure at acidic pH for progressive myoclonus epilepsy (EPM1) repeat d(CCCCGCCCCGCG)n. PMID: 11697735
    30. analysed eight markers flanking CSTB(GT10-D21S1890-D21S1885-D21S2040-D21S1259- CSTB-D21S1912-PFKL-D21S171) and one intragenic variant in the CSTB 3' UTR (A2575G) PMID: 12215838
    31. first demonstration of cysteine protease activity being regulated by CSTB activity in a biological context; effects of decreased CSTB activity in EPM1 pathogenesis may be mediated by cathepsins through increased activity of cathepsins S and L PMID: 12452481
    32. Prefibrillar oligomers/aggregates of stefin B also increase the surface pressure at an air-water interface, i.e. they have amphipathic character and are surface seeking. PMID: 15955063
    33. These data show that cystatin B inhibits bone resorption by down-regulating intracellular cathepsin K activity despite increased osteoclast survival. PMID: 16321512
    34. Study shows that copper binding by stefin B inhibits the amyloid fibril formation and, to a lesser degree, the initial aggregation. PMID: 16939620
    35. Several alternatively spliced CSTB isoforms were identified in patients with progressive myoclonus epilepsy of Unverricht-Lundborg type . PMID: 17003839
    36. Results describe the influence of pH and trifluoroethanol on amyloid fibril growth and morphology from human stefin B. PMID: 17701471
    37. cystatin B in vivo has a polymeric structure sensitive to the redox environment and that overexpression of the protein generates aggregates. PMID: 17920138
    38. CSTB is specifically overexpressed in most HCCs and is also elevated in the serum of a large proportion of HCC patients PMID: 18281540
    39. Data show that wild-type stefin B and its Y31 isoform are able to form pores in planar lipid bilayers, whereas the G4R isoform destroys the bilayer by a non pore-forming process. PMID: 18397316
    40. The mechanism of amyloid-fibril formation by stefin B: temperature and protein concentration dependence of the rates;the observed kinetics follow the nucleation and growth behavior observed for many other amyloidogenic proteins. PMID: 18636508
    41. potential role for CSTB in HIV replication in placental macrophages PMID: 18951626
    42. cystatin B interacts with STAT-1 and the levels of STAT-1 tyrosine phosphorylation (but not serine phosphorylation) between uninfected and HIV-infected PM and MDM are differentially regulated. PMID: 19342095

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  • 相关疾病：
    Epilepsy, progressive myoclonic 1 (EPM1)
  • 亚细胞定位：
    Cytoplasm. Nucleus.
  • 蛋白家族：
    Cystatin family
  • 数据库链接：

    HGNC: 2482

    OMIM: 254800

    KEGG: hsa:1476

    STRING: 9606.ENSP00000291568

    UniGene: Hs.695