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中文名称:人细胞毒性T淋巴细胞相关抗原4(CTLA-4/CD152)酶联免疫试剂盒
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货号:CSB-E09171h
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规格:96T/48T
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价格:¥3200/¥2500
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其他:
产品详情
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产品描述:
The product CSB-E09171h is a sandwich ELISA kit developed to measure concentrations of human CTLA4 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 CTLA4 in samples. The color intensity is measured at 450 nm via a microplate reader.
CTLA4 is a membrane glycoprotein constitutively expressed on regulatory T (Treg) cells and upregulated on activated T cells. It is involved in the repression of T cell proliferation, cell cycle progression, and cytokine production. CTLA-4 inhibits T cell activation by various suppressive functions including competition with CD28, modulation of the inhibitory function of Treg cells, such as transendocytosis, and the control of adhesion and motility. It is a critical modulator of T cell homeostasis and self-tolerance. Studies have CTLA4 can inhibit cell cycle progression in T-cells by suppressing the generation of cyclin D3 and cyclin-dependent kinases. Human CTLA-4 insufficiency is caused by heterozygous germline mutations in CTLA4 and is characterized by a complex immune dysregulation syndrome.
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别名:CTLA4; CD152; Cytotoxic T-lymphocyte protein 4; Cytotoxic T-lymphocyte-associated antigen 4; CTLA-4; CD antigen CD152
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缩写:
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Uniprot No.:
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种属:Homo sapiens (Human)
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样本类型:serum, plasma, tissue homogenates
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检测范围:125 pg/mL-8000 pg/mL
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灵敏度:31.25 pg/mL
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反应时间:1-5h
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样本体积:50-100ul
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检测波长:450 nm
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研究领域:Immunology
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测定原理:quantitative
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测定方法:Sandwich
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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 CTLA-4 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 % 99 Range % 96-102 1:2 Average % 87 Range % 84-93 1:4 Average % 111 Range % 107-115 1:8 Average % 104 Range % 100-108 -
回收率:
The recovery of human CTLA-4 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) 85 81-89 EDTA plasma (n=4) 92 87-98 -
标准曲线:
These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed. pg/ml OD1 OD2 Average Corrected 8000 2.303 2.398 2.351 2.249 4000 1.420 1.468 1.444 1.342 2000 0.745 0.704 0.725 0.623 1000 0.423 0.409 0.416 0.314 500 0.285 0.298 0.292 0.190 250 0.222 0.232 0.227 0.125 125 0.161 0.168 0.165 0.063 0 0.103 0.101 0.102 -
数据处理:
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货期:3-5 working days
引用文献
- Effects of modular nursing model for typical issues on enteral nutrition status, immune function, and quality of life in colon cancer patients F Chen,/,2023
- Immune Checkpoints in Recurrent Pregnancy Loss: New Insights into a Detrimental and Elusive Disorder L Marozio,International Journal of Molecular Sciences,2023
- Soluble cytotoxic T-lymphocyte–associated antigen 4 (sCTLA-4) as a potential biomarker for diagnosis and evaluation of the prognosis in Glioma J Liu,BMC Immunology,2021
相关产品
靶点详情
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功能:Inhibitory receptor acting as a major negative regulator of T-cell responses. The affinity of CTLA4 for its natural B7 family ligands, CD80 and CD86, is considerably stronger than the affinity of their cognate stimulatory coreceptor CD28.
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基因功能参考文献:
- PTPN22 and CTLA-4 polymorphisms are associated with Autoimmune polyglandular syndromes and differentiate between polyglandular and monoglandular autoimmunity. PMID: 29409002
- CTLA4 expression levels was found significantly lower in the alopecia areata patients in Iranian cohort; no association between CTLA4 genetic polymorphism and susceptibility to alopecia areata PMID: 29979892
- The CTLA-4 gene +49 A/G polymorphism and the NOD2/CARD15 gene N852S polymorphism were not associated with CD or UC in a Turkish population PMID: 30213296
- The CTLA4 gene is suggested to correlate with immune thrombocytopenia through its abnormal expression level instead of gene site mutation. PMID: 30319055
- Paget disease is characterized by an intense lymphocytic response, devoid of the immune-suppressive impact of the PD-L1 pathway, but with occasional CTLA-4 expression PMID: 29943071
- Depending on the environmental conditions, Mesenchymal stem/stromal cells express different isoforms of CTLA-4 with the secreted isoform (sCTLA-4) being the most abundant under hypoxic conditions. Furthermore, the immunosuppressive function of Mesenchymal stem/stromal cells is mediated mainly by the secretion of CTLA-4. PMID: 30087255
- Increased frequency and CTLA-4-expression of Varicella Zoster Virus-specific T cells from cerebrospinal fluid or blood are specifically found in patients with Varicella Zoster Virus-related Central Nervous System-infection. PMID: 28845512
- Rs56102377 in the 3'-UTR of CTLA4 may act as a protective factor by disrupting the regulatory role of miR-105 in CTLA4 expression. PMID: 30355938
- The present work showed in West Algerian population that the HLA-B27 antigen and the variation in the CTLA4 3'UTR region played an important role in the ankylosing spondylitis susceptibility. The heterogeneity of this disease is deduced by genetic difference found between B27+ and B27- groups. PMID: 29675891
- High CTLA4 expression is associated with Melanoma. PMID: 29150430
- CTLA4 protein had significantly higher serum level in recurrent spontaneous abortion patients than in healthy controls. In recurrent spontaneous abortion patients, AA genotype carriers had higher CTLA4 serum level than that GG genotype carriers. Minor alleles of CTLA4 polymorphisms might inhibit the recurrent spontaneous abortion susceptibility via upregulated the protein expression level. PMID: 30334961
- The results in our meta-analysis indicated that CTLA4 +49A/GG allele/AA genotype was associated with the risk of colorectal cancer in the Asian population and overall populations PMID: 29970719
- The CTLA4 -318/C/T SNP was associated with an increased risk to develop IgAN, while the CT60 G/A genotype significantly associated with the risk for higher proteinuria PMID: 29539619
- This review summarizes the current literature relevant to T cell exhaustion in patients with Hepatitis B virus (HBV)related chronic hepatitis, and discusses the roles of CTLA4 in T cell exhaustion. [review] PMID: 29786112
- Study provides evidence that CTLA4 +49 A/G (Thr/Ala) polymorphism was strongly associated with T1diabetes in south India. PMID: 29603038
- gene polymorphism is associated with psoriasis in Turkish population PMID: 29850619
- The mRNA expression of FAS was lower in patients with TP53 mutation than TP53 wild-type. Our findings suggest that TP53 mutation is a potential negative predictor of metastatic melanoma treated with CTLA-4 blockade. PMID: 29793878
- TSA results indicated that CTLA-4 +49A/G should be considered as a biomarker for HT, whereas both the CT60 and -318C/T SNPs warrant confirmation by further studies PMID: 29461867
- susceptibility to RSA was subject to the synthetic regulation of chromosomal aberrations and genetic mutations within CLTA-4 and Foxp3, suggesting that the conduction of karyotype analysis and genetic detection for RSA patients could effectively guide effective RSA counseling and sound child rearing. PMID: 29476189
- CTLA4 missense variant significantly associates with inhibitor development in Argentine patients with severe haemophilia A PMID: 28220572
- Study suggests that miR-487a-3p might repress CTLA4 and FOXO3 by binding to their 3'UTRs and contribute to the development of T1D. PMID: 29859273
- the expression of mCTLA-4 in skin lesion inversely correlated with the severity of psoriasis and CTLA-4 might play a critical role in the disease severity of psoriasis. PMID: 29305257
- Hematopoietic stem cell transplantation for CTLA4 deficiency with pathogenic mutations resulting in complex immune dysregulation syndromes. PMID: 27102614
- Our results suggest that CTLA-4 may be involved in lipid metabolism and affect Type 2 diabetes mellitus (T2DM)disease progression and/or the development of diabetic complications although this gene does not represent a major risk factor for T2DM. PMID: 29511375
- rs231775, rs4553808 and rs5742909 but not rs3087243 and rs733618 were significantly related to cancer risk. In analyses stratified by ethnicity, both rs231775 and rs4553808 were significant susceptibility polymorphisms in an Asian population but not in a Caucasian population. PMID: 29794444
- Paper analyses results of serum cytokines and lymphocyte apoptosis study in nodular goiter against the background of autoimmune thyroiditis and thyroid adenoma based on the cell preparedness to apoptosis, the number of apoptotic lymphocytes and the content of proapoptotic tumor necrosis factor-alpha, interleukins in serum, considering the polymorphism of BCL-2, CTLA-4 and APO-1 genes. PMID: 29250672
- -318C/T polymorphism of CTLA-4 gene might play a significant role in the development of SLE in the Iranian patients. PMID: 24400885
- the immune response to specific miHA mismatches is modulated by the CTLA-4 genotype of the donor PMID: 28827064
- It was concluded that the abnormal expression of endometrial E2A existed in mid-secretory endometrium of women with recurrent miscarriage, and there was a positive correlation between E2A and FOXP3, and E2A and CTLA-4, suggesting the possible regulatory role of E2A in endometrium receptivity. PMID: 29270752
- This study shows a significant overexpression of CTLA-4 in >50% of breast carcinomas with no such overexpression of CTLA-4 in benign breast tissues. PDL-1 staining is seen in only a small number of invasive ductal carcinomas (4.1%). PMID: 29672601
- CTLA4 gene is suggested to correlated with polycyctic ovary syndrome, and influence polycycstic ovary syndrome through regulating obesity and the homeostatic model assessment for insulin resistance in a novel way. PMID: 30024513
- We describe three cases of patients with mRCC treated with anti-PD-1 antibody therapy in combination with targeted therapy (bevacizumab), anti-cytotoxic T lymphocyte antigen 4 therapy (ipilimumab), or radiotherapy. PMID: 29146617
- The CTLA-4c.49A>G and CTLA-4g.319C>T single nucleotide polymorphisms might be considered as low risk susceptibility locus for prostate cancer PMID: 28101800
- anti-CTLA4/anti-PD-1/PD-L1 combinations versus anti-PD-1/PD-L1 monotherapy was selected as a factor independent of TMB for predicting better RR (77% vs. 21%; P = 0.004) and PFS (P = 0.024). Higher TMB predicts favorable outcome to PD-1/PD-L1 blockade across diverse tumors. PMID: 28835386
- Polymorphisms at IL10 (-1082 G>A), IL4 (-589 C>T), CTLA4 (+49A>G), and DAO (+8956 C>G) genes were studied in 55 cases. PMID: 28750137
- this study showed that CTLA-4 + 49A/G polymorphism was not correlated with greater genetic risk for leprosy. However, GG genotype was associated with older age, older age of onset and over-representation in male in an Iranian Azeri population. PMID: 29104093
- Our meta-analysis suggested that the +49 A/G polymorphism in CTLA4 might be a risk factor for asthma susceptibility, especially in Asian individuals, children, and patients with atopy PMID: 29995780
- Genetic polymorphisms of CTLA-4 gene on the nucleotide 49 at codon 17 of exon 1, TSHR gene SNP rs2268458 of intron 1, number of regulatory T cells and TRAb levels play a role as risk factors for relapse in patients with Graves' disease. PMID: 29093229
- These results demonstrate that POSTN promotes the osteogenic differentiation of mesenchymal stem cells (MSCs) and that CTLA4 enhances the ectopic osteogenesis of MSCs-CTLA4-based tissue-engineered bone. PMID: 28687929
- the polymorphism -318C/T of CTLA-4 gene is associated with RBC alloimmunization among sickle cell disease patients. This highlights the role played by CTLA-4 on post-transfusion alloantibody development PMID: 28815969
- Meta-analysis found that CTLA4 -318C/T gene polymorphism is not associated with the risk of acute rejection in renal transplantation in overall populations. PMID: 28449371
- Our goal was to stimulate antitumor immunity by combining SS1P or LMB-100 with anti-CTLA-4. We constructed a BALB/c breast cancer cell line expressing human mesothelin (66C14-M), which was implanted in one or two locations. SS1P or LMB-100 was injected directly into established tumors and anti-CTLA-4 administered i.p. In mice with two tumors, one tumor was injected with immunotoxin and the other was not. PMID: 28674083
- Taken together, we found that Id3+ and CTLA-4+ endometrial cells were significantly higher in women with repeated implantation failure and recurrent miscarriage, suggesting the negative roles of these angiogenesis and immune tolerance markers involving in regulating endometrium receptivity. PMID: 28224680
- study indicated that the polymorphisms of rs231775 and rs231725 would be the risk factors of Primary Biliary Cholangitis [meta-analysis] PMID: 28642883
- Suggest that genetic polymorphisms of CTLA-4 function as sex-dependent risk factors for development of acute rejection in an Iranian kidney transplant population. PMID: 28031007
- A phase Ib study of dasatinib plus ipilimumab in patients with gastrointestinal stromal tumor (GIST) and other sarcomas was performed on the basis of preclinical data demonstrating that combined KIT and CTLA-4 blockade is synergistic. PMID: 28007774
- The data we presented here showed that CTLA-4 was highly expressed in regulatory T cells and PD-1 decreased in CD8+ T cells in peripheral blood of SCLC patients, suggesting their unique mechanisms involved in immune regulation. PMID: 29167005
- Significant differences in the CpG-methylation patterns between tumor tissues and matched controls were observed for CTLA4 showing a decreased methylation of this gene in non-small cell lung cancer patients. Expression studies confirmed that hypomethylation also resulted in increased expression of CTLA4. PMID: 28503213
- The polymorphisms +49 G/A, -1661 A/G and -318 C/T may elevate the susceptibility to BC, but the polymorphism CT60 G/A may offer protection against the cancer. PMID: 28416762
- In children with idiopathic nephrotic syndrome (INS), serum CTLA-4 concentration significantly increased at remission compared with onset. Furthermore, a positive significant correlation was observed between Treg number and serum CTLA-4 level. This suggests that Treg and CTLA-4 are involved in the induction of remission in INS. PMID: 28544686
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相关疾病:Systemic lupus erythematosus (SLE); Diabetes mellitus, insulin-dependent, 12 (IDDM12); Celiac disease 3 (CELIAC3); Autoimmune lymphoproliferative syndrome 5 (ALPS5)
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亚细胞定位:Cell membrane; Single-pass type I membrane protein. Note=Exists primarily an intracellular antigen whose surface expression is tightly regulated by restricted trafficking to the cell surface and rapid internalization.
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组织特异性:Widely expressed with highest levels in lymphoid tissues. Detected in activated T-cells where expression levels are 30- to 50-fold less than CD28, the stimulatory coreceptor, on the cell surface following activation.
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