Importance of Immunogenic salivary glycans in eliciting resistance to ticks
Importance of Immunogenic salivary glycans in eliciting resistance to ticks
批准号:
9386568
负责人:
SUKANYA NARASIMHAN
金额:
$22.19万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2017
资助国家:
美国
项目状态:
已结题
起止时间:
2017-06-01 至 2019-05-31
关键词:
AddressAnimalsAntigensBlack-legged TickBloodBorrelia burgdorferiBostonCarbohydratesCarrier ProteinsCaviaCore FacilityDeer TickDevelopmentDrosophila genusEnsureGlycoproteinsGoalsHost DefenseHumanImmuneImmune responseImmunityImmunizationImmunizeImpairmentIxodesLyme DiseaseModelingMolecularNymphOryctolagus cuniculusPatternPharmacologyPlayPolysaccharidesProteinsRecombinant ProteinsRecombinantsResearchResistanceRoleSalivaSalivarySalivary ProteinsSeminalStructureSystemTick InfestationsTicksTimeTrager Psychophysical IntegrationVaccinesbasedefense responsedesignfeedingglycosylationimmunogenicimmunoregulationmedical schoolsnovelnovel strategiespathogenpreventtransmission processvector
中文摘要
摘要:
--
肩部硬蜱,通常被称为马鹿扁虱,是几种软体动物中最主要的扁虱媒介之一。
人类的病原体,包括伯氏疏螺旋体,以及莱姆病病原体和病毒,都是通过收容者传播的。
在喂食过程中,病原体会感染寄主。目前还没有针对这些由壁虱传播的病原体的疫苗。
这项提案还将审查一种全新的治疗范式,它表明唾液和多糖在治疗中发挥着至关重要的作用。
在引发免疫系统反应的过程中,寄主是阻止蚊子进食的关键因素。这项研究将继续进行。
针对以唾液和葡聚糖为基础的新型疫苗的未来发展趋势的论调,该疫苗旨在阻止滴虫的喂养和预防。
多个由扁虱传播的病原体的传播途径被转移到主要宿主。
威廉·特雷格的这一开创性的研究观察结果显示,他反复发现这种不允许的感染。
东道主,如豚鼠和白兔,引发了针对危重患者的轻快的体液免疫反应。
滴答是唾液中的成分,它的结果是阻止滴答和喂食-这是一种被称为收购的现象。
滴答-抗性。我们的初步观察表明,糖基化依赖于唾液中分泌的滴答蛋白质。
在诱发豚鼠的抗螨性方面起着非常重要的作用。糖类可以替代碳水化合物或装饰品。
目前有几种常见的唾液蛋白可能会维持唾液蛋白的结构和功能。
葡聚糖的装饰有可能成为一种“载体相关的分子DNA模式”,例如(鞋面)和诱导。
导致免疫排斥反应的葡聚糖特异性免疫反应。需要进一步发展这一新概念,并需要进一步确定。
扁虱、唾液和糖类在扁虱-宿主相互作用的新背景下的重要作用,我们将:。
--
答:我们将识别唾液和多糖的免疫原性,并通过一种抗蜱的豚鼠血清进行靶向检测。--
--
B.我们将识别唾液糖蛋白,这些糖蛋白可能含有免疫原性糖蛋白。
--
C.他们确定豚鼠的免疫应答是否含有更多的多糖或更多的糖蛋白,这是否可能会引发滴虫--
因此,抗药性可以阻止蚊虫的滋生,防止病原体的传播。我们将继续使用这种细菌。
伯格多费氏菌就是一个很好的例子,它是一种由壁虱传播的新病原体。
--
这一努力的结果将从一个新的侧面揭示唾液和蛋白质之间的联系--也就是糖类。
修饰这些蛋白质,发挥这些多糖在调节宿主免疫系统中的重要作用,并为宿主提供新的免疫功能。
可以采取的方法是减少蚊虫的摄食,防止病原体的传播。
英文摘要
ABSTRACT
Ixodes scapularis, commonly known as the deer tick, is the predominant tick vector of several
human pathogens including Borrelia burgdorferi, the Lyme disease agent and transmits the harbored
pathogens to the host during feeding. Vaccines against these tick-borne pathogens are not available.
This proposal will examine a new paradigm that suggests a critical role for tick salivary glycans
in provoking immune responses in the host critical to thwart tick feeding. This study will set the
tone for the development of tick salivary glycan-based vaccines to block tick feeding and prevent
transmission of multiple tick-transmitted pathogens to the host.
William Trager’s seminal observation showed that repeated tick infestations of non-permissive
hosts such as guinea pigs and rabbits provoke a brisk humoral immune response directed against critical
tick salivary components that results in thwarting tick feeding – a phenomenon referred to as acquired
tick-resistance. Our initial observations demonstrate that glycosylations on secreted tick salivary proteins
play a significant role in eliciting tick-resistance in guinea pigs. Glycans or carbohydrates decorations
present on several tick salivary proteins likely maintain the structure and function of the protein. These
glycan decorations potentially serve as “vector-associated-molecular patterns” (VAMPs) and elicit
glycan-specific immune responses that result in tick rejection. To develop this concept and to determine
the role of tick salivary glycans in the context of tick-host interactions we will:
A. Identify immunogenic salivary glycans targeted by tick-resistant guinea pig sera.
B. Identify salivary glycoproteins that contain immunogenic glycans.
C. Determine if immunization of guinea pigs with the glycans or glycoproteins might provoke tick-
resistance and consequently thwart tick feeding and prevent pathogen transmission. We will use B.
burgdorferi as an example of a tick-transmitted pathogen.
The results of this effort will illuminate a new facet of tick salivary proteins – the glycans that
decorate the proteins and the role of these glycans in modulating host immunity and offer new
approaches to impair tick feeding and prevent pathogen transmission.
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