Composition and formation of the cyst wall
囊肿壁的组成和形成
基本信息
- 批准号:10406908
- 负责人:
- 金额:$ 41.75万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-06-01 至 2024-05-31
- 项目状态:已结题
- 来源:
- 关键词:AcetylgalactosamineAcquired Immunodeficiency SyndromeAnimalsAntibody titer measurementAppearanceAreaBiogenesisBirdsBrainBypassCellsChorioretinitisChronicCystDevelopmentDevelopmental BiologyDiseaseDolichosEncephalitisEquilibriumEyeFecesFelis catusFood ContaminationGenesGenetic TechniquesGlycoproteinsGoalsHumanImmuneImmune responseImmune systemImmunocompetentImmunocompromised HostImmunologic TechniquesImpairmentIndividualInfectionIngestionInvestigationKnock-outLabelLaboratoriesLectinLife Cycle StagesLongitudinal StudiesMammalsMediatingMembraneMental RetardationMethodsModelingMorbidity - disease rateMorphologyMucinsMusNeuraxisNeuronsOocystsOpportunistic InfectionsOralOrgan TransplantationOrganismParasitesPathogenicityPatientsPharmaceutical PreparationsPost-Translational Protein ProcessingProteinsProteomeProteomicsPublicationsReagentRecurrenceReproducibilityResearchRoleRuptureScaffolding ProteinSporozoitesStressStructural ProteinStructureTechniquesTherapeutic AgentsThickTimeTissuesToxoplasma gondiiToxoplasmosisVacuoleacute infectionanimal tissueasexualchronic infectioncongenital infectioncontaminated waterglycosylationimprovedin uterolatent infectionnovel strategiespathogenpreventpublic health relevancesuccinylated wheat germ agglutinintherapeutic developmenttransmission processvaccine development
项目摘要
ABSTRACT: Toxoplasma gondii is a ubiquitous Apicomplexan protozoan parasite of mammals and
birds. It is unusual in that propagation does not require passage through its definitive host enabling T.
gondii to propagate clonally through its intermediate hosts. T. gondii causes congenital infections in
immune competent hosts and opportunistic infections in immune compromised hosts. The predilection
of this parasite for the central nervous system causing necrotizing encephalitis and for the eye causing
chorioretinitis constitutes its major threat to patients. The development of these diseases is a
consequence of the transition of bradyzoites, found within tissue cysts into actively replicating
tachyzoites. It is believed that tissue cysts are not static structures, but regularly rupture reinvading new
host cells. It is likely that in chronic toxoplasmosis, i.e. latent infection, tissue cysts within host cells,
regularly transform to tachyzoites which are removed or sequestered by the immune system.
Degenerating cysts are often seen in the brains of mice with chronic toxoplasmosis. Such a dynamic
equilibrium between encysted and replicating forms leads to recurrent antigenic stimulation and the
persistent antibody titers found in chronically infected hosts. The widespread distribution of T. gondii in
humans and other animals is due to the ability of tissue cysts to permit oral transmission of this infection.
The cyst wall is the critical structure for survival, reactivation and transmission of T. gondii.
Understanding T. gondii developmental biology and formation of the cyst wall will inform strategies such
as vaccine development and therapeutic agents to eliminate latency and prevent reactivation
toxoplasmosis. Several lines of evidence suggest that bradyzoite differentiation is stress mediated
and that the cyst wall (a modified parasitophorous vacuole membrane) contains many stage specific
proteins and glycoproteins. Our laboratory group has identified several cyst wall specific proteins
several of which have mucin type domains that are o-glycosylated and demonstrated that
glycosylation is important for cyst wall stability. CST1, a cyst wall glycoprotein, appears to be a
scaffolding protein for formation of the cyst wall and we hypothesize that other cyst wall proteins
interact with CST1 in establishing the cyst wall. Our laboratory group has developed techniques to
purify the cyst wall enabling proteomic characterization of this structure as well as adapted BirA
tagging techniques to enable definition of the cyst wall interactome. Furthermore, we have
established ppGalNAcTs knockout T. gondii strains that enable studies on the role of o-glycosylation
in cyst wall formation. An integrated approach employing proteomic, immunologic and genetic
techniques will be used to fully characterize the T. gondii cyst wall proteome and the importance and
interactions of the identified cyst wall components. The improved understanding of the formation of
the cyst wall provide by these studies will provide the basic underpinnings of new strategies to
eliminate latent infection thereby preventing reactivation toxoplasmosis.
摘要:弓形虫是一种广泛存在于哺乳动物体内的顶复门原虫,
鸟这是不寻常的,因为传播不需要通过其最终宿主,使T。
弓形虫通过其中间宿主进行克隆繁殖。T.弓形虫导致先天性感染,
免疫活性宿主和免疫受损宿主中的机会性感染。好发
这种寄生虫的中枢神经系统引起坏死性脑炎和眼睛引起
脉络膜视网膜炎是其对患者的主要威胁。这些疾病的发展是一个
在组织包囊内发现的缓殖子转变为活跃复制的结果
速殖子据认为,组织囊肿不是静态结构,而是定期破裂,
宿主细胞在慢性弓形虫病,即潜伏感染中,宿主细胞内的组织囊肿,
有规律地转化为速殖子,然后被免疫系统清除或隔离。
慢性弓形虫病小鼠的大脑中经常可见退化的囊肿。这种动态
包囊和复制形式之间的平衡导致反复的抗原刺激,
在慢性感染宿主中发现的持续抗体滴度。T.弓形虫
人类和其他动物的感染是由于组织囊肿允许这种感染的口腔传播的能力。
孢囊壁是T.刚地。
了解T.弓形虫发育生物学和囊壁的形成将为以下策略提供信息,
作为疫苗开发和治疗剂,以消除潜伏期并防止再激活
弓形虫病一些证据表明缓殖子的分化是应激介导的
囊壁(一种改良的寄生空泡膜)含有许多阶段特异性的
蛋白质和糖蛋白。我们的实验室小组已经确定了几个囊壁特异性蛋白质
其中一些具有o-糖基化的粘蛋白型结构域,并证明
糖基化对于囊壁稳定性是重要的。CST 1是一种囊壁糖蛋白,似乎是一种
我们假设其他的囊壁蛋白
与CST 1相互作用形成囊壁。我们的实验室团队已经开发出了技术,
纯化囊壁,使得能够对该结构以及适应的BirA进行蛋白质组学表征
标签技术,使定义的囊肿壁相互作用组。此外,我们还
建立ppGalNAcTs敲除T.能够研究O-糖基化作用的弓形虫菌株
形成囊壁。采用蛋白质组学、免疫学和遗传学的综合方法
技术将被用来充分表征T.弓形虫囊壁蛋白质组及其重要性
识别的囊壁成分的相互作用。更好地理解形成
这些研究提供的囊壁将为新的策略提供基础,
消除潜伏感染,从而防止再激活弓形虫病。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Secreted Effectors Modulating Immune Responses to Toxoplasma gondii.
- DOI:10.3390/life11090988
- 发表时间:2021-09-20
- 期刊:
- 影响因子:0
- 作者:Tomita T;Guevara RB;Shah LM;Afrifa AY;Weiss LM
- 通讯作者:Weiss LM
Toxoplasma gondii Matrix Antigen 1 Is a Secreted Immunomodulatory Effector.
- DOI:10.1128/mbio.00603-21
- 发表时间:2021-05-18
- 期刊:
- 影响因子:6.4
- 作者:Tomita T;Mukhopadhyay D;Han B;Yakubu R;Tu V;Mayoral J;Sugi T;Ma Y;Saeij JPJ;Weiss LM
- 通讯作者:Weiss LM
MAG2, a Toxoplasma gondii Bradyzoite Stage-Specific Cyst Matrix Protein.
MAG2,一种弓形虫缓殖子阶段特异性包囊基质蛋白。
- DOI:10.1128/msphere.00100-20
- 发表时间:2020
- 期刊:
- 影响因子:4.8
- 作者:Tu,Vincent;Mayoral,Joshua;Yakubu,RamaR;Tomita,Tadakimi;Sugi,Tatsuki;Han,Bing;Williams,Tere;Ma,Yanfen;Weiss,LouisM
- 通讯作者:Weiss,LouisM
Characterization of a SRS13: a new cyst wall mucin-like domain containing protein.
SRS13 的表征:一种新的囊壁粘蛋白样结构域蛋白。
- DOI:10.1007/s00436-018-5934-3
- 发表时间:2018
- 期刊:
- 影响因子:2
- 作者:Tomita,Tadakimi;Ma,Yanfen;Weiss,Louis
- 通讯作者:Weiss,Louis
Stage-Specific and Selective Delivery of Caged Azidosugars into the Intracellular Parasite Toxoplasma gondii by Using an Esterase-Ester Pair Technique.
使用酯酶-酯对技术将笼中的叠氮糖阶段特异性地选择性递送至细胞内寄生虫弓形虫中。
- DOI:10.1128/msphere.00142-19
- 发表时间:2019
- 期刊:
- 影响因子:4.8
- 作者:Tomita,Tadakimi;Wang,Hua;Wu,Peng;Weiss,LouisM
- 通讯作者:Weiss,LouisM
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Louis M. Weiss其他文献
Opportunistic pulmonary aspergillosis with chest wall invasion: plain film and computed tomographic findings
机会性肺曲霉菌病伴胸壁侵犯:平片和计算机断层扫描结果
- DOI:
- 发表时间:
1983 - 期刊:
- 影响因子:0
- 作者:
P. Caligiuri;Heber MacMahon;John Courtney;Louis M. Weiss - 通讯作者:
Louis M. Weiss
A Toxoplasma gondii O-glycosyltransferase that modulates bradyzoite cyst wall rigidity is structurally and functionally distinct from host homologues
调节缓殖子包囊壁刚性的弓形虫 O-糖基转移酶在结构和功能上与宿主同源物不同
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Pranav Kumar;T. Tomita;Thomas A. Gerken;Collin J. Ballard;Y. Lee;Louis M. Weiss;Nadine L. Samara - 通讯作者:
Nadine L. Samara
emPlasmodium/em microtubule-binding protein EB1 is critical for partitioning of nuclei in male gametogenesis
疟原虫/红细胞内期疟原虫微管结合蛋白 EB1 对于雄性配子发生过程中的核分裂至关重要
- DOI:
10.1128/mbio.00822-23 - 发表时间:
2023-06-13 - 期刊:
- 影响因子:4.700
- 作者:
Sydney Mauer;Nelly Camargo;Biley A. Abatiyow;Olivia R. Gargaro;Stefan H. I. Kappe;Sudhir Kumar;Louis M. Weiss - 通讯作者:
Louis M. Weiss
Microsporidiosis in Humans
- DOI:
10.1128/cmr.00010-20 - 发表时间:
2021 - 期刊:
- 影响因子:
- 作者:
Bing Han;Guoqing Pan;Louis M. Weiss - 通讯作者:
Louis M. Weiss
Microsporidian spores contain hibernating dimeric ribosomes
微孢子虫孢子含有处于冬眠状态的二聚体核糖体。
- DOI:
10.1038/s41564-023-01481-0 - 发表时间:
2023-09-14 - 期刊:
- 影响因子:19.400
- 作者:
Elizabeth Weyer;Louis M. Weiss - 通讯作者:
Louis M. Weiss
Louis M. Weiss的其他文献
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{{ truncateString('Louis M. Weiss', 18)}}的其他基金
International Workshop on Opportunistic Protists (IWOP-12, 13 and 14)
机会原生生物国际研讨会(IWOP-12、13和14)
- 批准号:
8408859 - 财政年份:2012
- 资助金额:
$ 41.75万 - 项目类别:
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