A dual-purpose vaccine targeting blood-feeding nematode parasites of sheep and humans
针对羊和人类吸血线虫寄生虫的双用途疫苗
基本信息
- 批准号:10434691
- 负责人:
- 金额:$ 45.07万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-09-05 至 2024-06-30
- 项目状态:已结题
- 来源:
- 关键词:AdjuvantAdultAncylostoma (genus)AnemiaAnimal ModelAnimalsAnthelminticsAntibodiesAntigensBehaviorBloodCD69 antigenCattleChildClinical TrialsCognitive deficitsComplementCountryDataDehydrationDepressed moodDevelopmentDiseaseEconomicsEducationEnvironmentFutureGenesGenetic TranscriptionGenetic VariationGenomicsGoalsGoatGrowthHaemonchusHairHamstersHealthHookworm InfectionsHookwormsHumanImmuneImmune systemImmunocompetentImmunocompromised HostImmunologicsImpaired cognitionInfectionIngestionIntestinesIron deficiency anemiaLaboratoriesLeadLethargiesLifeLife Cycle StagesMalnutritionMedicalMulti-Drug ResistanceNecatorNematodaNutrientParasitesPathogenicityPeptide HydrolasesPersonsPharmaceutical PreparationsPharmacotherapyPhase I Clinical TrialsPhylogenetic AnalysisPlanet EarthPreventive vaccineProductionProductivityProteinsReproductionResearchResistanceRoleRuminantsSheepSpecificityStrongylidaSystemTechniquesTestingToxinVaccinatedVaccine AntigenVaccinesVeterinary MedicineWeightWoolacquired immunityadverse maternal outcomesbaseburden of illnesscomparativecomparative genomicsdisabilitydrug efficacyefficacy validationfeedingfood securitygastrointestinalgenome-wide analysishuman modelimmunosuppressedimprovedin vivonematode antigennovel vaccinespreclinical studypreventprophylacticsuccesstraittranscriptometranscriptome sequencingtranscriptomicsvaccine candidatevaccine developmentvaccine efficacyvaccine trial
项目摘要
Project Summary/Abstract (30 lines permitted)
Hookworms (genera Ancylostoma and Necator) and Haemonchus contortus are related (clade V, suborder
Strongylida) blood-feeding gastrointestinal nematode (GIN) parasites of humans and ruminants. In humans,
hookworms are a leading cause of anemia globally and one of the most medically important parasites on earth,
infecting half a billion people and causing growth stunting, cognitive impairment, malnutrition, and loss of future
earnings/education/productivity. In small ruminants (e.g., sheep, goats), Haemonchus is one of the most
important and devastating parasites, with infections leading to severe dehydration, anemia, lethargy, depressed
low-energy behavior, rough hair coats, low weights, and poor wool and lamb production. Infections can be lethal.
Drug efficacy is becoming limited for both groups of parasites, with resistance emerging in humans and
widespread in sheep. Therefore, complementation of drug treatment with a prophylactic vaccine would be an
enormous step forward for control and eventual elimination of blood-feeding GIN parasites. However, vaccine
development against blood-feeding GINs is complicated because these parasites are masters at evading the
immune system. We propose to use state-of-the art genomic, transcriptomic, and immunoinformatic techniques
to identify and prioritize novel vaccine targets against blood-feeding GINs. Preliminary data are encouraging. We
will use our promising preliminary data to investigate what constitutes a good vaccine against blood-feeding
GINs, as well as to improve the efficacy of one vaccine candidate by altering expression platforms and adjuvants.
Furthermore, we will use genomics, transcriptomics, and immunoinformatics to compare intestinal-specific genes
encoding putative secreted proteins between these two blood-feeding parasites, and to compare
immunomodulated genes encoding putative secreted intestinal proteins between these two nematode parasites.
These comparisons will be used to identify conserved, high-value blood-feeding-specific GIN antigens. These
candidate antigens will be tested first in our small animal model of human hookworm infection to identify single
hookworm vaccine antigens, and/or a combination of hookworm vaccine antigens, that will engender complete
or near-complete protection from infection in the laboratory. Promising antigens will be rapidly transferred to a
large animal system;; sheep will be vaccinated with the corresponding H. contortus antigens and similarly
assessed for protection. Immunological and mechanistic aspects of protection will be studied. Our goal is to
identify one or more immunogens that can be optimized in pre-clinical studies and then advanced to human and
ovine/caprine clinical trials.
项目摘要/摘要(允许30行)
钩虫(Ancylostoma和Necator属)和Haemonchus contortus是相关的(进化枝V,子订单)
prongylida)血液喂食胃肠线虫(GIN)人类和反刍动物的寄生虫。在人类中
钩虫是全球贫血的主要原因,是地球上最重要的医学寄生虫之一,
感染了十亿人,并引起增长阻碍,认知障碍,营养不良和未来的丧失
收入/教育/生产力。在小型反刍动物(例如绵羊,山羊)中,Haemonchus是最多的
重要和毁灭性的寄生虫,感染导致严重的脱水,贫血,嗜睡,抑郁症
低能量的行为,粗大的毛衣,低重量,羊毛和羊肉生产不良。感染可能是致命的。
两组寄生虫的药物疗效都受到限制,人类和
绵羊的宽度。因此,用预防性疫苗完成药物治疗将是
向前迈出了巨大的一步,以控制和最终消除流血杜松子酒寄生虫。但是,疫苗
反对血液喂食杜松子酒的发育很复杂,因为这些寄生虫是探查的硕士学位
免疫系统。我们建议使用最先进的基因组,转录和免疫信息技术
识别并确定针对血液喂养杜松子酒的新型疫苗靶标。初步数据令人鼓舞。我们
将使用我们的诺言初步数据来研究什么构成抗血液的良好疫苗
杜松子酒,以及通过改变表达平台和佐剂来提高一种疫苗候选者的效率。
此外,我们将使用基因组学,转录组学和免疫信息来比较肠道特异性基因
在这两个喂养寄生虫之间编码推定的分泌蛋白质,并比较
在这两个线虫寄生虫之间编码推定的分泌肠蛋白的免疫调节基因。
这些比较将用于鉴定保守的高价值血液喂养特异性杜松子酒抗原。这些
候选抗原将首先在我们的小动物人类钩虫感染中进行测试,以鉴定单一
钩虫疫苗抗原和/或钩虫疫苗抗原的组合,将使完整
或几乎完全完全保护实验室感染。有希望的抗原将迅速转移到
大动物系统;绵羊将接种相应的H. contortus抗原,并类似地接种
评估以保护。保护的免疫学和机械方面将研究。我们的目标是
确定可以在临床前研究中进行优化的一种或多种免疫原,然后发展为人类
椭圆形/caprine临床试验。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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{{ truncateString('RAFFI V AROIAN', 18)}}的其他基金
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A dual-purpose vaccine targeting blood-feeding nematode parasites of sheep and humans
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$ 45.07万 - 项目类别:
A dual-purpose vaccine targeting blood-feeding nematode parasites of sheep and humans
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