B cell repertoires and function in food allergen multi-OIT
B cell repertoires and function in food allergen multi-OIT
批准号:
9463230
负责人:
Scott Dexter Boyd
金额:
$29.05万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2013
资助国家:
美国
项目状态:
已结题
起止时间:
2013-07-01 至 2024-01-31
关键词:
AddressAffectAffinityAllergensAllergicAllergic DiseaseAntibodiesAntibody RepertoireAntigensB cell repertoireB-LymphocytesBasophilsBiologicalBiological MarkersBiological Response Modifier TherapyBiopsy SpecimenBloodCashew nutCellsCharacteristicsClinicalClinical DataClinical TrialsClone CellsCollaborationsDNADataData AnalysesDiseaseEpitopesEvaluationFlow CytometryFollow-Up StudiesFoodFood HypersensitivityFrequenciesGastrointestinal tract structureGenomicsHeterogeneityHumanHypersensitivityIgEImmunoglobulin Gene RearrangementImmunoglobulinsImmunologicsImmunophenotypingImmunotherapyIndividualInterleukin-4Longitudinal StudiesLongterm Follow-upMilkMilk HypersensitivityMolecularMonitorMonoclonal Antibody TherapyNatureParticipantPathogenicityPatientsPersonsPhasePhenotypePopulationProtocols documentationRestSamplingSerologicalSeveritiesSeverity of illnessSiteSomatic MutationSpecificitySpecimenT-LymphocyteTimeTissuesUnited Statesanti-IgEdeep sequencingdesensitizationfood allergeninterleukin-13 receptoroptimal treatmentsoral immunotherapyperipheral bloodpredicting responseresponsetargeted treatmenttreatment responsetreatment strategy
中文摘要
项目总结:
在美国,食物和过敏症日益流行,约有三分之一的患者患有过敏症。
反应性导致多种食物过敏。临床上存在一个尚未得到满足的问题,需要及时有效地治疗多种食物过敏问题。
方式,但这些机械性的因素表明,他们应该指导选择一种最优的治疗方法和战略,这一点还不清楚。
本研究项目旨在对人类免疫球蛋白(Ig)和人类B细胞免疫球蛋白(Ig)有基本的、新的认识。
对于对多种食物过敏的患者的反应,我们需要进一步分析由多种过敏原诱导的B细胞的改变。
口服免疫疗法(MULTIOIT)可以单独使用,也可以与其他生物制品联合使用,目的是靶向IgE受体或主要的IL-4/IL-13受体。
成分为IL-4Rα。我们将继续使用流式细胞术分离过敏原特异的B细胞,重点放在特定细胞上。
对于牛奶、花生或腰果过敏原,他们将其与免疫球蛋白(Ig)基因的DNA和深度DNA测序结果配对。
重排是为了更好地表征过敏患者体内致病的B细胞群,重排和重组是为了确定是什么。
这些克隆抗体种群的变化、抗体的同型表达、抗体的体细胞突变、细胞和亲和力的变化都是由人诱导的。
在成功的多细胞移植治疗过程中,这些B细胞亚群仍然存在。我们将不会评估是否有B细胞亚群。
曲目和功能,无论是在玩多人游戏之前,还是在玩多人游戏期间,都可以预测参与者的反应。
我们将被用来指导治疗。这些研究将继续在来自具有良好特征的和多过敏的患者的标本上进行。
参与者参与了第一个试点、第二阶段、多阶段临床试验、第三个项目第一个阶段中提出的建议,以及来自其他适当项目的建议。
特应性疾病和健康儿童作为受试者。我们将继续进行评估,并比较B细胞和正常人的分子生物学特征。
针对牛奶、花生和腰果等过敏原的抗体可检测其自身的变化,以应对多种过敏反应。
同样的人。据报道,在一组参与者中,我们将继续研究血液标本和胃肠道活检标本中的B细胞。
确定外周血中B细胞的监测在多大程度上准确地反映了人类过敏性疾病的状态。
GI记录了患者的情况,观察和分析了多种药物引起的临床变化。更重要的是,我们还将分析其对患者的影响。
在多器官移植期间,针对IgE受体或IL-4Rα的单克隆抗体和治疗方法,无法确定这些抗体在多大程度上影响这些疾病。
生物疗法可以影响多细胞诱导的B细胞变化的性质和时间进程。我们还将继续讨论。
在我们的临床试验和MAPX治疗试验中,对所有参与者的B细胞进行长期跟踪研究。
从本项目中获得的B细胞数据将与临床数据和实验数据结合在一起进行分析。
来自T细胞和嗜碱性粒细胞的数据来自第一、第三和第四、第三和第二核心B项目,这些数据是与全球数据和分析中心合作完成的。
核心C,旨在对与多种食物相关的免疫学和表型进行全面的综合评估。
过敏性疾病、疾病和疾病的成功治疗和持久的治疗性药物反应归功于多用途疫苗。
英文摘要
PROJECT SUMMARY
Food allergy is increasingly prevalent in the United States, and approximately one-third of patients have
reactivity to multiple foods. There is an unmet clinical need to treat multi-food allergy in a timely and efficacious
manner, but the mechanistic factors that should guide selection of an optimal treatment strategy are unclear.
This project aims to obtain fundamental new understanding of human B cell and immunoglobulin (Ig)
responses in patients allergic to multiple foods, and to analyze the B cell alterations induced by multi-allergen
oral immunotherapy (multi-OIT) alone or in combination with biologics targeting IgE or the IL-4/IL-13 receptor
component IL-4Rα. We will use flow cytometry isolation of allergen-specific B cells, focusing on cells specific
for milk, peanut or cashew allergens, paired with DNA deep sequencing of immunoglobulin (Ig) gene
rearrangements, to characterize pathogenic B cell populations in allergic patients, and to determine what
changes in clonal populations, antibody isotype expression, antibody somatic mutation, and affinity are induced
in these B cell populations during successful multi-OIT treatment. We will evaluate whether there are B cell
repertoire features, either prior to multi-OIT, or during multi-OIT, that predict participants’ responses and could
be used to guide therapy. The studies will be performed on specimens from well-characterized multi-allergic
participants in the pilot, phase 2 multi-OIT clinical trial proposed in Project 1, as well as from appropriate
atopic and healthy control subjects. We will evaluate and compare the molecular features of B cells and
antibodies specific for milk, peanut and cashew allergens, and their alterations in response to multi-OIT, within
the same people. In a subset of participants, we will study B cells in both blood and GI biopsy specimens, to
determine to what extent peripheral blood B cell monitoring accurately reflects the allergic disease state in the
GI tract of patients, and the changes induced by multi-OIT. Importantly, we will also analyze the effects of
monoclonal antibody therapies targeting IgE or IL-4Rα during multi-OIT, to determine the extent to which these
biologic therapies affect the nature and time course of B cell changes induced by multi-OIT. We will additionally
perform long-term follow up studies of B cells in participants in our POISED and MAPX OIT trials.
The B cell data from this Project will be combined and analyzed together with clinical data and experimental
data from T cells and basophils from Projects 1, 3 and 4, and Core B, in collaboration with the Data Analysis
Core C, to enable a comprehensive evaluation of immunological phenotypes associated with multi-food
allergic disease, and with successful and durable therapeutic responses to multi-OIT.
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会议论文
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海外基金