Microbiota depletion ameliorates sickle cell induced vaso-occlusive crisis and organ damage
微生物群耗竭可改善镰状细胞引起的血管闭塞危机和器官损伤
基本信息
- 批准号:9917576
- 负责人:
- 金额:$ 6.53万
- 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:2019-03-16 至 2022-03-15
- 项目状态:已结题
- 来源:
- 关键词:16S ribosomal RNA sequencingAcuteAffectAgingAmericanAnti-Bacterial AgentsAnti-Inflammatory AgentsAntibiotic TherapyAntibioticsAntioxidantsBacteriaBlood TransfusionBlood VesselsBone Marrow TransplantationBypassCause of DeathCell AdhesionCell Adhesion MoleculesCell membraneCellsCesarean sectionCessation of lifeChelating ActivityChronicClinical TreatmentDNA biosynthesisDataDefectDeferoxamineDevelopmentDietDiseaseDisease ProgressionErythrocytesEscherichia coliFDA approvedFetal HemoglobinFunctional disorderGenesGerm-FreeHematological DiseaseHemolysisHomeostasisHospitalizationHumanHydroxamic AcidsHypoxiaImmune responseInflammatoryInheritedInjectionsIntegrinsIronIron Chelating AgentsIron OverloadLaboratoriesLeadLifeMacrophage-1 AntigenMammalian CellMediatingMusMutationOralOrganOxidantsPainPathologicPathologyPatientsPharmaceutical PreparationsPlayPredispositionProbioticsRecombinant DNAReportingResolutionResourcesRoleSamplingSepsisSeveritiesSeverity of illnessSickle CellSickle Cell AnemiaSignal TransductionStressTestingTherapeuticToxic effectTransplantationTreatment EfficacyUnited StatesVendorWorkagedalternative treatmentbasebeta Globincongeniccostcost effectiveexperimental studyfecal microbiotahost microbiomehydroxyureainflammatory markeriron metabolismmetal chelatormicrobialmicrobiomemicrobiotamouse modelneutrophilnovelprematuresicklingtissue injuryvaso-occlusive crisis
项目摘要
Project Summary:
As the most common inherited blood disorder in the United State, there are 70,000-100,000 Americans with
sickle cell anemia. Sickle cell disease (SCD) is caused by a mutation in the β-globin gene, which leads to
significant deformation red blood cell (RBC) membrane and promotes RBC adhesion to other cells to induce
vaso-occlusive crises (VOC). Chronic sickle cell anemia is accompanied with progressive systemic multi-
systemic organ dysfunction and cost over $475 million annually in hospital admission. Our laboratory has
reported that sickle cell-induced hypoxic, oxidant, and inflammatory stress is perpetuated by aged neutrophils
which positively correlates with VOC in humanized SCD mice. Our recent work has demonstrated that deletion
of the microbiota in SCD mice by antibiotics restricted aged neutrophil expansion which consequently decreased
VOC severity, and reduced organ damage as well as the iron overload. In addition, hydroxyurea, the only FDA-
approved drug for SCD that promotes the anti-sickling fetal hemoglobin expression, also possesses anti-
inflammatory, antiradical, and metal-chelating activities both in mammalian cells as well as in bacteria.
In this application, we propose a 3-year experimental plan that will advance our understanding in the function of
microbiota in SCD disease progression and will test whether manipulation of the microbiota will provide a
potential novel SCD treatment. In Specific Aim 1, we will identify disease-modifying microbiota species that may
contribute to neutrophil aging and SCD organ damage. 16S sequencing data has revealed microbiota differences
between antibiotic treatment and untreated SCD mice, and the function of selected microbiota will be verified in
germ-free SCD mice. In Specific Aim 2, we will examine if hydroxyurea reduces VOC and organ damage through
microbiota manipulations in SCD mice in which fecal samples from hydroxyurea-treated and control SCD mice
will be transplant to germ-free SCD to evaluate whether hydroxyurea-induced changes in the microbiota
contribute to its therapeutic activity. In Specific Aim 3, we will study if iron restriction (by DFO or low-iron diet) or
probiotics-induced changes in iron metabolism can ameliorate chronic organ damage in SCD mice. Iron-related
changes in microbiota will be verified by germ-free SCD mice. These proposed studies, focused on strategies of
microbiota manipulation in SCD, will allow us to identify the key microbial species that contribute to SCD
pathophysiology, and provide potential novel cost-effective approaches for management of SCD’s life-long
complications.
项目摘要:报告摘要:报告
--
作为美国最常见的遗传性血液病之一,美国约有7万至10万人患有这种疾病。
镰刀状红细胞性贫血。镰刀状红细胞性贫血是由β--珠蛋白基因突变导致的,这可能会导致癌症。
红细胞(RBC)膜的显著变形促进了RBC对其他细胞的黏附作用,从而诱导了细胞的死亡。
血管闭塞性血管危象(VOC)。慢性镰状细胞性贫血伴发进行性系统性红斑狼疮。
全身性器官和功能障碍的住院费用每年超过4.75亿美元。我们的实验室项目已经完成。
据报道,镰状细胞诱导的缺氧、抗氧化剂和炎症性应激反应是由老化的中性粒细胞持续存在的。
在人源化的SCD小鼠中,这与VOC基因的缺失呈正相关。我们最近的研究工作也证明了这一缺失。
在使用抗生素的SCD小鼠中,大多数微生物区系受到限制,导致中性粒细胞的扩张受到限制,因此减少了。
VOC的严重程度,减轻了器官损害,减轻了铁超载。此外,羟基尿素是唯一符合FDA的标准。
批准的治疗SCD的药物,它可以促进胎儿血红蛋白的表达,也具有一定的抗病作用。
炎症、抗自由基活性、蛋白质和金属螯合活性在哺乳动物细胞中都存在,在细菌中也是如此。
在这次申请中,我们将提出一个新的三年试点计划,这将进一步促进我们对新技术的基本功能的理解。
微生物群在SCD疾病进展过程中的作用将进一步检验对这些微生物群的操纵是否会提供一个新的解决方案。
SCD可能是一种新的治疗方法。在具体的治疗目标1中,我们将无法识别可能导致疾病改变的微生物群和物种。
导致中性粒细胞老化和SCD器官损害的因素。16s DNA测序数据进一步揭示了微生物区系的差异。
在抗生素治疗和未治疗的SCD小鼠之间,我们将在未来几年内对选定的微生物群的功能进行进一步的验证。
无菌的SCD小鼠。在特定的目标2中,我们将不会研究羟基尿素是否通过它来减少挥发性有机化合物和器官损害。
微生物区系控制在SCD小鼠中进行,其中粪便样本来自羟基尿素处理过的小鼠,而SCD小鼠则为对照。
将被移植到无菌的SCD细菌,以进一步评估羟基尿素是否会导致微生物区系发生变化。
为其进一步的治疗活动做出贡献。在具体的目标3中,我们将继续研究是否限制铁的摄入(通过DFO或低铁饮食)。
益生菌诱导的铁代谢的改变可以改善SCD小鼠的慢性器官损害。
微生物区系的变化将由无菌的SCD小鼠进行进一步的验证。在这些拟议的研究中,重点放在了研究的策略上。
在SCD中,微生物区系的操纵将使我们能够更好地识别可能对SCD做出贡献的关键微生物物种。
病理生理学、生物学和生物学为儿童终身疾病的管理提供了一种潜在的、新颖的、高性价比的方法。
并发症。
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)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Huihui Li其他文献
Huihui Li的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Huihui Li', 18)}}的其他基金
Microbiota depletion ameliorates sickle cell induced vaso-occlusive crisis and organ damage
微生物群耗竭可改善镰状细胞引起的血管闭塞危机和器官损伤
- 批准号:
10574815 - 财政年份:2022
- 资助金额:
$ 6.53万 - 项目类别:
The microbiome determines organ damage development in sickle cell disease
微生物组决定镰状细胞病的器官损伤发展
- 批准号:
10895168 - 财政年份:2022
- 资助金额:
$ 6.53万 - 项目类别:
The microbiome determines organ damage development in sickle cell disease
微生物组决定镰状细胞病的器官损伤发展
- 批准号:
10525715 - 财政年份:2022
- 资助金额:
$ 6.53万 - 项目类别:
相似海外基金
Acute senescence: a novel host defence counteracting typhoidal Salmonella
急性衰老:对抗伤寒沙门氏菌的新型宿主防御
- 批准号:
MR/X02329X/1 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Fellowship
Transcriptional assessment of haematopoietic differentiation to risk-stratify acute lymphoblastic leukaemia
造血分化的转录评估对急性淋巴细胞白血病的风险分层
- 批准号:
MR/Y009568/1 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Fellowship
Combining two unique AI platforms for the discovery of novel genetic therapeutic targets & preclinical validation of synthetic biomolecules to treat Acute myeloid leukaemia (AML).
结合两个独特的人工智能平台来发现新的基因治疗靶点
- 批准号:
10090332 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Collaborative R&D
Cellular Neuroinflammation in Acute Brain Injury
急性脑损伤中的细胞神经炎症
- 批准号:
MR/X021882/1 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Research Grant
KAT2A PROTACs targetting the differentiation of blasts and leukemic stem cells for the treatment of Acute Myeloid Leukaemia
KAT2A PROTAC 靶向原始细胞和白血病干细胞的分化,用于治疗急性髓系白血病
- 批准号:
MR/X029557/1 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Research Grant
Combining Mechanistic Modelling with Machine Learning for Diagnosis of Acute Respiratory Distress Syndrome
机械建模与机器学习相结合诊断急性呼吸窘迫综合征
- 批准号:
EP/Y003527/1 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Research Grant
FITEAML: Functional Interrogation of Transposable Elements in Acute Myeloid Leukaemia
FITEAML:急性髓系白血病转座元件的功能研究
- 批准号:
EP/Y030338/1 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Research Grant
STTR Phase I: Non-invasive focused ultrasound treatment to modulate the immune system for acute and chronic kidney rejection
STTR 第一期:非侵入性聚焦超声治疗调节免疫系统以治疗急性和慢性肾排斥
- 批准号:
2312694 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Standard Grant
ロボット支援肝切除術は真に低侵襲なのか?acute phaseに着目して
机器人辅助肝切除术真的是微创吗?
- 批准号:
24K19395 - 财政年份:2024
- 资助金额:
$ 6.53万 - 项目类别:
Grant-in-Aid for Early-Career Scientists
Collaborative Research: Changes and Impact of Right Ventricle Viscoelasticity Under Acute Stress and Chronic Pulmonary Hypertension
合作研究:急性应激和慢性肺动脉高压下右心室粘弹性的变化和影响
- 批准号:
2244994 - 财政年份:2023
- 资助金额:
$ 6.53万 - 项目类别:
Standard Grant