更新于：2024-11-01

CD32B x CD23 x FCER1A

更新于：2024-11-01

基本信息

关联

项与 CD32B x CD23 x FCER1A 相关的药物

Epsi-gam

靶点

CD23 x CD32B x FCER1A

作用机制

CD23拮抗剂 [+2]

在研机构-

原研机构

Tunitas Therapeutics, Inc.

在研适应症-

非在研适应症

超敏反应

最高研发阶段终止

首次获批国家/地区-

首次获批日期1800-01-20

项与 CD32B x CD23 x FCER1A 相关的临床试验

NCT02559258 / Terminated临床1期

A Phase I, Randomized, Double-Blind, Placebo-Controlled, Escalating Single Dose Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Epsi- Gam in Healthy, Cat-, Dust Mite-, or Bermuda Grass-Allergic Subjects

This is a single-center, randomized, double-blind, placebo-controlled, single-dose, dose- escalation study in otherwise healthy cat-, dust mite-, or Bermuda grass-allergic male and female subjects. There will be five dosing cohorts (0.1, 0.3, 1.0, 3.0 and 10.0 mg/kg), with eight subjects in each cohort, randomized to either epsi-gam (6 subjects) or placebo (2 subjects) for a total of 40 subjects. The first cohort will receive the starting dose of 0.1 mg/kg epsi-gam or placebo and subsequent cohorts will be recruited sequentially to receive escalating doses of epsi-gam or placebo.

开始日期2015-08-01

申办/合作机构

Tunitas Therapeutics, Inc.

[+1]

100 项与 CD32B x CD23 x FCER1A 相关的临床结果

登录后查看更多信息

100 项与 CD32B x CD23 x FCER1A 相关的转化医学

登录后查看更多信息

0 项与 CD32B x CD23 x FCER1A 相关的专利（医药）

登录后查看更多信息

项与 CD32B x CD23 x FCER1A 相关的文献（医药）

2023-02-01·Journal of Thoracic Disease

Polymorphisms in the FCER2 gene have associations with asthma and chronic obstructive pulmonary disease

Article

作者: Song, Siyao ; Li, Lun ; Huang, Yilin ; Li, Jia ; Zheng, Zhoude ; Huang, Tingting ; Gao, Jinming ; Liu, Yi

BackgroundAsthma and chronic obstructive pulmonary disease (COPD) are heterogenetic diseases and exhibit many similarities. Dutch hypothesis proposed that these two diseases may have common genetic origins. This study aims to investigate whether asthma and COPD share a common genetic background in Chinese patients.MethodsIn this case-control study, single nucleotide polymorphisms (SNPs) were genotyped using SNaPshot. Haplotype disease analysis and haplotype phenotype analysis were applied to assess the relationship between three polymorphisms of the FCER2 gene and the risk of COPD/asthma. Additionally, associations between polymorphisms of the FCER2 gene and phenotypes were analyzed.ResultsWe detected ten SNPs of seven genes (FCER1A, FCGR2A, FCGR2B, CHI3L1, ADRB2, STAT6, and FCER2) expressed by airway epithelial cells. We detected genotypes and allele distributions in 251 COPD patients, 597 asthma patients, and 632 healthy controls. A significant difference was found in the FCER2 gene (rs28364072) between COPD patients and controls (P=0.009). Significant differences were observed in the genotype and allele distributions of rs1801274 (FCGR2A), rs12368672 (STAT6), and rs2228137 (FCER2) between asthma patients and controls (P=0.004, 0.007 and 0.010, respectively). Notably, polymorphisms of FCER2 gene were associated with the risk of both COPD (P=0.009 for rs28364072) and asthma (P=0.01 for rs2228137). Haplotype analysis revealed that haplotype T-G-T (alleles of rs28364072, rs2228137, and rs3760687, respectively) was significantly associated with a higher risk of asthma [odds ratios (OR) =2.25, 95% confidence interval (CI): 1.26-4.01, P=0.006]. Further analysis showed that the C-A-C haplotype and C-G-T haplotype were associated with increased blood eosinophils in either COPD or asthma patients (P=0.034, and P<0.001, respectively). Moreover, haplotypes C-A-C, C-G-C, and T-G-C showed significant associations with serum IgE levels in asthma patients (P=0.002, 0.041, and 0.004, respectively).ConclusionsOur data suggest that the FCER2 gene might associate with predisposition to asthma and COPD, while FCER2 haplotypes were associated with pulmonary function measurements and blood eosinophils counts in both diseases. Our findings support the common genetic basis for asthma and COPD, suggesting a potential therapeutic target for the two diseases.

1994-01-01·International Archives of Allergy and Immunology3区 · 医学

Cloning of cDNAs for New Subtypes of Murine Low-Affinity Fc Receptor for IgE (FcεRII/CD23)

3区 · 医学

Article

作者: Tsuchiya, Shiuichi ; Ichikawa, Yoshiaki ; Kondo, Hidehiko ; Nakamura, Kazuhiro

In humans, two subtypes of the low-affinity Fc receptor for IgE, Fc epsilon RIIa and Fc epsilon RIIb, have been identified. The two forms differ only in a short stretch of amino acids at the cytoplasmic amino terminus. On the other hand, only one Fc epsilon RIIa-like receptor was reported in the mouse, although the existence of another subtype of transcript has been suggested. A new cDNA subtype for murine Fc epsilon RII that has amino acid homology to the human subtype b at the amino terminus was cloned by polymerase chain reaction. When expressed transiently in COS cells, the cDNA is capable of generating a functional cell surface protein that is recognized by an anti-Fc epsilon RII antibody and that has affinity to IgE. In the spleen, although the expression level is considerably lower than that of subtype a, the transcript appears in B cells and in non-B cells upon stimulation with IL-4 and LPS, in contrast to the constitutive expression of the conventional Fc epsilon RII transcript. It is also detectable in several cell lines of B- or T-cell lineages. These results suggest that this gene may be the murine counterpart of human Fc epsilon RII subtype b. Another cDNA clone for the distinct Fc epsilon RII transcript has also been isolated. The cDNA also encodes a surface protein functional on COS cells, but its human counterpart has not been found.

1992-10-01·Cellular Immunology3区 · 医学

Inhibition of B cell proliferation by antisense DNA to both α and β forms of FcϵR II

3区 · 医学

Article

作者: Laveeza Bhatti ; Kristin Behle ; Ronald H. Stevens

Epstein-Barr Virus (EBV) infection activates B lymphocyte proliferation through partially understood mechanisms, resulting in phenotypic changes, including the appearance of new antigens. One such antigen is Fc epsilon R II/CD-23 which may be relevant for B cell proliferation. We have used anti-sense oligonucleotides to study the importance of the two forms of this molecule for proliferation in the EBV-transformed, Fc epsilon R II +ve lymphoblastoid B cell line, RPMI 8866. Anti-sense oligodeoxynucleotides were generated to the two forms of Fc epsilon R II; Fc epsilon R IIa (alpha) and IIb (beta) which differ only in their intracytoplasmic domains. Addition of increasing concentrations of anti-sense oligonucleotides, ranging from 1 to 30 microM, significantly decreased cellular proliferation as measured by the incorporation of [3H]thymidine (inhibition range 8-88%). Optimum inhibition of cellular proliferation was apparent at 15 microM concentration of both anti-sense Fc epsilon R IIa and IIb (Fc epsilon R IIa, mean +/- SE = 75 +/- 7% inhibition, p less than 0.001; Fc epsilon R IIb, mean +/- SE = 71 +/- 7% inhibition, p less than 0.001). Anti-sense oligonucleotides complementary to the common part of Fc epsilon R II resulted in a similar inhibition of proliferation. Sense oligonucleotides did not induce significant inhibition. Preincubation of sense and anti-sense oligonucleotides resulted in an abrogation of proliferation inhibition. Moreover, none of these oligonucleotides had any effect on a Fc epsilon R II -ve cell line. Incubation with both anti-sense IIa and IIb resulted in additive, but not synergistic inhibition of proliferation. Addition of soluble Fc epsilon R II did not reverse inhibition of proliferation, suggesting that membrane-bound or intracellular rather than soluble Fc epsilon R II was important for the induced proliferation. Analysis of cell surface expression for Fc epsilon II indicated that while there was a pronounced effect on cell number following incubation with anti-sense oligonucleotides, surface expression of Fc epsilon R II was consistent as measured over different time points. PCR analysis revealed that while most cells expressed either the alpha or the beta form of Fc epsilon R II, EBV-transformed cell lines, particularly RPMI 8866, were found to express both alpha and beta forms simultaneously. This may constitute a mechanism whereby EBV infection confers an immortal state to the cell, resulting in its uncontrolled proliferation. Cell lines expressing only one receptor form, either alpha or beta, were unaffected after incubation with anti-sense oligonucleotides.(ABSTRACT TRUNCATED AT 400 WORDS)