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  4. Human B cell activation factor，BAFF ELISA Kit

Human B cell activation factor，BAFF ELISA Kit

  • 中文名称：
    人B细胞活化因子（BAFF）酶联免疫试剂盒
  • 货号：
    CSB-E11912h
  • 规格：
    96T/48T
  • 价格：
    ￥3800/￥2500
  • 其他：

产品详情

  • 产品描述：

    CUSABIO's human BAFF ELISA kit is an in vitro enzyme-linked immunosorbent assay for quantitatively measuring human BAFF in serum, plasma, or tissue homogenates. This assay uses the sandwich enzyme immunoassay technique in combination with the enzyme-substrate chromogenic reaction to quantify the analyte in the sample. The color develops positively to the amount of BAFF in samples. The color intensity is measured at 450 nm via a microplate reader.

    BAFF, encoded by the TNFSF13B gene, is a ligand for BAFFR that is required for peripheral B-cell survival and homeostasis. Upon binding to BAFFR, BAFF activates several downstream pathways that regulate basic survival functions including protein synthesis and energy metabolism necessary to extend the half-life of immature, transitional, and mature B cells. BAFF/BAFFR signaling plays a fundamental role during the transition from immature T1 to T2 B cells and therefore in the generation of mature B cells in the spleen. BAFF is increased in autoimmune diseases and is correlated with disease activity. increased levels of BAFF have been detected in the serum and synovial fluid of rheumatoid arthritis (RA) patients.

  • 别名：
    ApoL related ligand TALL 1 ELISA Kit; B cell Activating Factor ELISA Kit; B lymphocyte stimulator ELISA Kit; B-cell-activating factor ELISA Kit; BAFF ELISA Kit; BLyS ELISA Kit; CD 257 ELISA Kit; CD257 ELISA Kit; CD257 antigen ELISA Kit; Delta BAFF ELISA Kit; Dendritic cell derived TNF like molecule ELISA Kit; Dendritic cell-derived TNF-like molecule ELISA Kit; DTL ELISA Kit; DTL precursor ELISA Kit; PRO738 ELISA Kit; soluble form ELISA Kit; TALL 1 ELISA Kit; TALL-1 ELISA Kit; TALL1 ELISA Kit; THANK ELISA Kit; TN13B_HUMAN ELISA Kit; TNF and APOL related leukocyte expressed ligand 1 ELISA Kit; TNF homolog that activates apoptosis ELISA Kit; TNF homolog that activates apoptosis NKFB and JNK. ELISA Kit; TNF- and APOL-related leukocyte expressed ligand 1 ELISA Kit; TNFSF13B ELISA Kit; TNFSF20 ELISA Kit; TNLG7A ELISA Kit; Tumor necrosis factor (ligand) superfamily member 13b ELISA Kit; Tumor necrosis factor ligand 7A ELISA Kit; Tumor necrosis factor ligand superfamily member 13b ELISA Kit; Tumor necrosis factor ligand superfamily member 20 ELISA Kit; Tumor necrosis factor like protein ZTNF4 ELISA Kit; Tumor necrosis factor superfamily member 13B ELISA Kit; UNQ401 ELISA Kit; ZTNF4 ELISA Kit
  • 缩写：
  • Uniprot No.：
  • 种属：
    Homo sapiens (Human)
  • 样本类型：
    serum, plasma, tissue homogenates
  • 检测范围：
    0.312 ng/mL-20 ng/mL
  • 灵敏度：
    0.078 ng/mL
  • 反应时间：
    1-5h
  • 样本体积：
    50-100ul
  • 检测波长：
    450 nm
  • 研究领域：
    Immunology
  • 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 BAFF in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.
    　SampleSerum(n=4)
    1:1Average %88
    Range %82-95
    1:2Average %90
    Range %85-96
    1:4Average %93
    Range %90-95
    1:8Average %92
    Range %88-96
  • 回收率：
    The recovery of human BAFF 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 TypeAverage % RecoveryRange
    Serum (n=5) 9285-99
    EDTA plasma (n=4)9087-94
  • 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/mlOD1OD2AverageCorrected
    202.912 2.953 2.933 2.819
    102.142 2.175 2.159 2.045
    51.295 1.312 1.304 1.190
    2.50.727 0.695 0.711 0.597
    1.250.426 0.443 0.435 0.321
    0.6250.297 0.312 0.305 0.191
    0.3120.247 0.261 0.254 0.140
    00.112 0.115 0.114 　
  • 数据处理：
  • 货期：
    3-5 working days

产品评价

靶点详情

  • 功能：
    Cytokine that binds to TNFRSF13B/TACI and TNFRSF17/BCMA. TNFSF13/APRIL binds to the same 2 receptors. Together, they form a 2 ligands -2 receptors pathway involved in the stimulation of B- and T-cell function and the regulation of humoral immunity. A third B-cell specific BAFF-receptor (BAFFR/BR3) promotes the survival of mature B-cells and the B-cell response.; Isoform 2 seems to inhibit isoform 1 secretion and bioactivity.; Acts as a transcription factor for its own parent gene, in association with NF-kappa-B p50 subunit, at least in autoimmune and proliferative B-cell diseases. The presence of Delta4BAFF is essential for soluble BAFF release by IFNG/IFN-gamma-stimulated monocytes and for B-cell survival. It can directly or indirectly regulate the differential expression of a large number of genes involved in the innate immune response and the regulation of apoptosis.
  • 基因功能参考文献：
    1. BAFF loop region controls B cell survival and regulates recognition by different inhibitors PMID: 29572442
    2. analysis of how BAFF is neutralized by belimumab gives insight into treatment of systemic lupus erythematosus PMID: 29572471
    3. Study uncovers a previously unrecognized regulation of BAFF by testosterone and raises important questions about BAFF in testosterone-mediated protection against autoimmunity. Among healthy men, serum BAFF levels are higher in men with low testosterone. PMID: 29802242
    4. High BAFF expression is associated with systemic lupus erythematosus. PMID: 28992184
    5. Co-immunoprecipitation analysis and siRNA-mediated suppression of CREB expression indicated that phospho-CREB has a positive effect on pro-inflammatory gene expression in the crosstalk between BAFF- and TLR4-mediated signaling by forming trimeric complexes containing NF-kappaB, CBP, and CREB PMID: 28374824
    6. this study shows that BAFF augments IgA2 and IL-10 production by TLR7/8 stimulated total peripheral blood B cells PMID: 28921509
    7. elevated pretransplant serum BAFF levels negatively affect renal allograft survival and represent a risk factor for allosensitization and subsequent antibody-mediated rejection PMID: 29277566
    8. Increased BAFF expression is associated with B cell class switching in patients with tuberculous pleural effusion. PMID: 29845274
    9. Expression patterns of BAFF and its receptors differ according to lupus nephritis class. PMID: 29087261
    10. Serum BAFF levels are elevated in idiopathic inflammatory myositis, more so in children. PMID: 29516280
    11. Post-transplant antibody mediated rejection in kidney transplantation recipients can be predicted by perioperative elevations in serum BAFF level. PMID: 27888573
    12. The results of the present study revealed a correlation between BAFF and the PI3K/Akt/mTOR signaling pathway, and it is hypothesized that they are involved in the pathogenesis of lupus nephritis PMID: 28849060
    13. The results suggest that increased levels of BAFF and APRIL produced in the central nervous system may influence the development of anti-neutrophil cytoplasmic antibody-hypertrophic pachymeningitis. PMID: 28847534
    14. Blood B lymphocyte stimulator (BLyS)/BAFF levels of HIV-uninfected commercial sex workers (CSWs) were lower than those observed in both HIV-infected CSW and HIV-uninfected non-CSW groups. PMID: 27561453
    15. our study throws light on the crosstalk between BAFF and BCR signaling pathways in neoplastic B cells, and provides insights into the mechanistic effects of SYK inhibitors in CLL. PMID: 28838991
    16. genetic polymorphisms of BAFF may increase the risk of posttransplant development of donor specific antibodies in kidney allograft recipients PMID: 28624489
    17. P\pre-sensitized patients had significantly higher BAFF levels before transplantation and suffered significantly more often from early steroid-resistant, mainly antibody-mediated rejections PMID: 28867309
    18. Elevated blood BAFF levels could be associated with a more stable disease. PMID: 27383531
    19. BAFF rs9514828 polymorphism may be associated with the chronic hepatitis and the combinatorial action of rs9514828 and rs12583006 may confer susceptibility to chronic HBV infection and the resolution of the infection, suggesting that host genetic factors associated with B cell mediated immune responses are involved in chronic HBV infection. PMID: 28627389
    20. This study demonstrated that An Increase of Cerebrospinal Fluid B-cell Activating Factor Level in Pediatric Patients With Acute Viral Encephalitis. PMID: 28259511
    21. data show that BAFF levels at the time of cGvHD diagnosis are associated with non-relapse-mortality, and also are potentially useful for risk stratification. PMID: 28481353
    22. BAFF-R was consistently expressed on B cells infected by HCMV. Enhancement of BAFF/BAFF-R signaling decreased the apoptosis rate and extended the survival of B cells. PMID: 28442365
    23. soluble BCMA sequesters circulating BAFF, thereby preventing it from performing its signaling to stimulate normal B-cell and plasma cell development, resulting in reduced polyclonal antibody levels in multiple myeloma patients. PMID: 26960399
    24. up-regulated expression in intractable temporal lobe epilepsy PMID: 28441631
    25. results showed that serum BAFF in nasal type, extranodal NK/T cell lymphoma patients was significantly higher than that in control group and negatively correlated with patients' survival. PMID: 27668971
    26. BAFF has a role in inducing IL35 production by regulatory B cells in lupus PMID: 28844943
    27. Inhibition of ADAM10 augments BAFF-dependent survival of primary human B cells, whereas inhibition of ADAM17 increases BAFFR expression levels PMID: 28249164
    28. Data presented show that B-cell activating factor (BAFF) plays a central role in the induction and maintenance of cigarette smoke-induced pulmonary antinuclear antibodies and suggest a therapeutic potential for BAFF blockade in limiting autoimmune processes associated with smoking. PMID: 28039405
    29. Among the BAFF receptors in a cohort of rheumatoid arthritis (RA) patients, the AA have shown, by fluorescence activated cell sorter (FACS) analysis of median fluorescence intensity (MFI), that transmembrane activator and calcium-modulating cyclophilin ligand interactor (TACI) and B cell maturation antigen (BCMA) do not change PMID: 28834574
    30. The BAFF promoter increased in response to TNF-alpha treatment or overexpression of HIF-1alpha. However, TNF-alpha-induced BAFF expression and promoter activity decreased after treatment with the ERK inhibitor PD98059. PMID: 28383556
    31. This study indicates that orbital fibroblasts from Graves' orbitopathy can express BAFF and mediate the intraorbital survival of B cells via BAFF mechanism. PMID: 28087387
    32. Rapamycin attenuates excessive hsBAFF-induced cell proliferation/survival via blocking mTORC1/2 signaling in normal and neoplastic B-lymphoid cells. PMID: 28300280
    33. Inhibition of B cell plasmablast differentiation by reduction of Aiolos and Ikaros may have utility in the treatment of systemic lupus erythematosus , where elevated levels of BAFF and Aiolos may prime CD27(+) memory and double negative memory-like B cells to become Ab-producing plasmablasts in the presence of BAFF and proinflammatory cytokines. PMID: 28848067
    34. BCMA has other contributors for ligands binding except DxL motif. The affinity of BCMA for APRIL higher than for BAFF may be caused by the segment outside of the conservative DxL motif. Moreover, the exposition of new binding modes of BCMA2 interacting with APRIL may establish the foundation of designing novel drugs in the future PMID: 28260502
    35. study demonstrated a high prevalence of endogenous antibodies to BAFF in a multi-ethnic Asian systemic lupus erythematosus (SLE) cohort; while levels of serum BAFF correlated positively with disease activity, levels of anti-BAFF antibody were correlated negatively with levels of its target cytokine, anti-dsDNA antibody and clinical disease activity PMID: 28388832
    36. this study provides new useful information about the increased levels of BAFF observed during HIV-1 infection and highlights the importance of macrophages as a source of BAFF PMID: 27022194
    37. The novel association between BAFF and inflammatory bowel disease (IBD) seems to identify that BAFF might regulate the inflammatory process in these diseases and it appears to be a potential marker of IBD. PMID: 27056038
    38. In BAFF, rs2893321 may be a susceptible genetic variant for the development of GD and AITDs. Associations of rs2893321 with susceptibility to GD and AITDs and the correlation between rs2893321 and TAb exhibit a dimorphic pattern. Additional studies with larger sample sizes are required to confirm our findings. PMID: 27136204
    39. BAFF and IL-17A are associated with different subphenotypes of primary Sjogren's syndrome. PMID: 25941062
    40. The expression levels of serum BAFF and the three receptors (TACI, BCMA and BAFF-R) in non-Hodgkin lymphoma patients were significantly higher than in healthy controls. PMID: 28028945
    41. Plasma BAFF levels were positively associated with serum creatinine, proteinuria, uric acid and group A Streptococcus infection index in patients with IgA nephropathy. PMID: 28260100
    42. this study shows that chicoric acid suppresses BAFF expression by inhibiting NF-kappaB activity, and chicoric acid may serve as a novel therapeutic agent to down-regulate excessive BAFF expression in autoimmune diseases PMID: 28122293
    43. Findings indicate that BAFF expression is significantly increased in chronic rhinosinusitis with nasal polyps patients and may orchestrate inflammatory load in polyp tissues by regulating T and B cell-mediated response. PMID: 28035475
    44. Urinary APRIL (uAPRIL) and BAFF (uBAFF) levels were raised significantly in AN. PMID: 27804111
    45. BAFF levels are lower in patients with antibody-mediated kidney rejection and also in patients with concurrent humoral and cellular rejection compared with patients without rejection PMID: 28083608
    46. The BLyS level is increased in some lupus patients. There was a moderate correlation with titers of anti-DNA antibody and disease activity. PMID: 27100979
    47. In Sjogren's syndrome (SS) patients, EULAR Sjogren's syndrome disease activity index (ESSDAI) is negatively associated with serum levels of 25(OH)-D3 and positively associated with BAFF. PMID: 28074193
    48. These results suggest that miR-202 functions as a modulator that can negatively regulate BAFF by inhibiting multiple myeloma tumor cell survival, growth, and adhesion in the bone marrow microenvironment. PMID: 25971527
    49. Variants in BAFF gene is associated with chronic lymphocytic leukemia. PMID: 27468724
    50. The results demonstrated that BAFF has an important role in the pathogenesis of newly diagnosed childhood immune thrombocytopenia. PMID: 24911453

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  • 亚细胞定位：
    Cell membrane; Single-pass type II membrane protein.; [Tumor necrosis factor ligand superfamily member 13b, soluble form]: Secreted.
  • 蛋白家族：
    Tumor necrosis factor family
  • 组织特异性：
    Abundantly expressed in peripheral blood Leukocytes and is specifically expressed in monocytes and macrophages. Also found in the spleen, lymph node, bone marrow, T-cells and dendritic cells. A lower expression seen in placenta, heart, lung, fetal liver,
  • 数据库链接：

    HGNC: 11929

    OMIM: 603969

    KEGG: hsa:10673

    STRING: 9606.ENSP00000365048

    UniGene: Hs.525157