Skin-Intrinsic Immunosuppressive Mesenchymal Stem Cells and aGVHD
皮肤固有免疫抑制间充质干细胞和 aGVHD
基本信息
- 批准号:10545022
- 负责人:
- 金额:$ 41.38万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-01-01 至 2025-12-31
- 项目状态:未结题
- 来源:
- 关键词:Acute Graft Versus Host DiseaseAddressAffectAllogeneic Bone Marrow TransplantationAllogenicApoptosisAttenuatedBiological AssayBone MarrowBone Marrow Cell TransplantationCell CommunicationCellsCessation of lifeCharacteristicsCollaborationsComplementComplicationCutaneousCytokeratinCytokine Network PathwayDataDendritic CellsDermalDiseaseDisease ProgressionEpidermal RidgesEpithelial CellsEpitheliumFamily memberFundingGoalsGraft-Versus-Tumor InductionHair follicle structureHomeImmuneImmune responseImmunophenotypingImmunosuppressionInduction of ApoptosisInflammatoryLaboratoriesLifeLimb structureLiverMalignant NeoplasmsMediatingMediatorMesenchymal Stem Cell TransplantationMesenchymal Stem CellsMessenger RNAMinor Histocompatibility AntigensModelingMonitorMorbidity - disease rateMucous MembraneMulti-Drug ResistanceMusOrganOrgan Culture TechniquesOrgan TransplantationPD-1 pathwayPD-1/PD-L1PathologyPathway interactionsPatientsPhenotypePreventionProteinsRNARecoveryResearchResistanceResolutionSeverity of illnessSiteSkinSolidSolid NeoplasmStem cell transplantSystemT cell responseT-LymphocyteTP53 geneTherapeuticTissuesValidationWorkXenograft Modelcytokine release syndromecytotoxicdesigndigitalepithelial injuryepithelial stem cellgraft vs host diseaseimmune reconstitutionimmunoregulationin vivoknockout genelaser capture microdissectionleukemia treatmentleukemia/lymphomamouse modelnovel therapeutic interventionprogrammed cell death ligand 1programmed cell death protein 1skin disorderspatiotemporalstem cell biomarkersstem cell engraftmentstem cell fatestem cell functionstem cellssynergismtissue injury
项目摘要
Project Summary/Abstract
Acute graft-versus-host disease (aGVHD) is a major limiting complication of allogeneic stem cell
transplantation for the treatment of leukemia/lymphoma and certain solid tumors. aGVHD occurs when T
lymphocytes from donor bone marrow attack cells within the recipient that are critical to the function vital
organs, namely skin, liver and gut. During the past three decades of research, Dr. Murphy’s laboratory has
found that in skin and squamous mucosae, the first sites of effector-target cell interaction provoked by
differences in minor histocompatibility antigens, involve T cells bearing Vb-specific markers that home
selectively to epithelial rete ridges as well as the epithelial stem cell-rich bulge regions of murine hair follicles.
This association results in death by apoptosis of adjacent epithelial cells that express the stem cell marker,
cytokeratin 15. Systemic therapeutic inhibition of these effector limbs is riddled with problems that include
collateral impact on immune reconstitution and blunting of graft-versus-tumor effects. However, we now know
through discoveries made in collaboration with co-PIs of this proposal, Drs. Markus and Natasha Frank, that
the skin and squamous mucosae harbor intrinsic cellular pathways capable of potent immunosuppression.
Specifically, we have discovered a dermal dendritic cell that has stem cell characteristics, expresses the
multidrug resistance transporter ABCB5, and also expresses PD-1. This cell has the ability to thwart T cell
responses, including alloreactivity, and therefore holds significant but as yet unexplored promise as a skin-
intrinsic pathway that may be leveraged to inhibit the tissue injury in aGVHD. In this proposal, Dr. Murphy and
the Drs. Frank have combined forces to address the long-term objective of harnessing the skin’s intrinsic
immunosuppressive capabilities to thwart aGVHD. The proposal’s specific objective is to determine the impact
of PD-1-expressing immunosuppressive dermal mesenchymal stem cells on the earliest and most specific
effector-target cell interactions responsible for aGVHD. To this end, we have proposed three specific aims:
1) to correlate spatiotemporal multiplex immune profiling with all aspects of disease morbidity and recovery
in aGVHD; 2) to dissect ABCB5 dermal stem cell function in aGVHD and define PD-1/PD-L1-centered
strategies for skin-intrinsic immunosuppression; and 3) to apply ABCB5+ dermal stem cell transplant
strategies to influence aGVHD severity using spatiotemporal multiplex immune profiling as effector-target
bioassay. The approaches involve state-of-the-art multiplex immunophenotyping of effector-target cell
interactions that sensitively and specifically typify tissue injury in aGVHD, and leverage ABCB5 gene knockout
and lineage tracing models in context of PD-L1 Ig administration and ABCB5+ stem cell engraftment. The
rationale is that upon successful completion of this work, we will identify novel therapeutic approaches to the
treatment and prevention of aGVHD skin and squamous mucosal pathology through manipulation of skin-
intrinsic immunosuppressive pathways.
项目概要/摘要
急性移植物抗宿主病(aGVHD)是同种异体干细胞的主要限制性并发症
用于治疗白血病/淋巴瘤和某些实体瘤的移植在 T 时发生。
来自供体骨髓的淋巴细胞会攻击受体内对生命功能至关重要的细胞
在过去三十年的研究中,墨菲博士的实验室已经对皮肤、肝脏和肠道等器官进行了研究。
发现在皮肤和鳞状粘膜中,效应细胞与靶细胞相互作用的第一个位点是由
微小组织相容性抗原的差异,涉及带有 Vb 特异性标记的 T 细胞
选择性地作用于上皮网脊以及小鼠毛囊的上皮干细胞丰富的凸起区域。
这种关联导致表达干细胞标记的相邻上皮细胞凋亡而死亡,
细胞角蛋白 15。这些效应肢的全身治疗性抑制充满了问题,包括
对免疫重建和减弱移植物抗肿瘤效应的附带影响然而,我们现在知道了。
通过与该提案的共同 PI Markus 和 Natasha Frank 博士合作的发现,
皮肤和鳞状粘膜具有能够有效抑制免疫的内在细胞途径。
具体来说,我们发现了一种具有干细胞特征的真皮树突状细胞,表达
多药耐药转运蛋白 ABCB5,还表达 PD-1,该细胞具有阻止 T 细胞的能力。
反应,包括同种异体反应,因此作为皮肤具有重要但尚未探索的前景。
在这项提议中,Murphy 博士和
弗兰克博士齐心协力实现利用皮肤内在的长期目标
该提案的具体目标是确定其影响。
表达PD-1的免疫抑制真皮间充质干细胞的最早和最特异的
为此,我们提出了三个具体目标:
1) 将时空多重免疫分析与疾病发病率和恢复的各个方面联系起来
aGVHD 中;2) 剖析 ABCB5 真皮干细胞在 aGVHD 中的功能并定义以 PD-1/PD-L1 为中心的
皮肤内在免疫抑制策略;3) 应用ABCB5+真皮干细胞移植
使用时空多重免疫分析作为效应目标影响 aGVHD 严重程度的策略
这些方法涉及最先进的效应靶细胞多重免疫表型分析。
敏感且特异地表征 aGVHD 中组织损伤的相互作用,并利用 ABCB5 基因敲除
PD-L1 Ig 给药和 ABCB5+ 干细胞植入背景下的谱系追踪模型。
基本原理是,在成功完成这项工作后,我们将确定新的治疗方法
通过皮肤操作治疗和预防aGVHD皮肤和鳞状粘膜病理学
内在免疫抑制途径。
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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NATASHA Y FRANK其他文献
NATASHA Y FRANK的其他文献
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{{ truncateString('NATASHA Y FRANK', 18)}}的其他基金
Targeting therapeutic resistance in glioblastoma
靶向胶质母细胞瘤的治疗耐药性
- 批准号:
10588313 - 财政年份:2023
- 资助金额:
$ 41.38万 - 项目类别:
Skin-Intrinsic Immunosuppressive Mesenchymal Stem Cells and aGVHD
皮肤固有免疫抑制间充质干细胞和 aGVHD
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10345441 - 财政年份:2022
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Multipotent ABCB5-positive cell therapeutics for corneal disease
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10374830 - 财政年份:2018
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ABCB5-positive stem cells for LSCD therapy
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ABCB5-positive stem cells for LSCD therapy
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- 批准号:
9316257 - 财政年份:2016
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ABCB5-positive stem cells for LSCD therapy
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9106905 - 财政年份:2016
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ABCB5-positive stem cells for LSCD therapy
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9895803 - 财政年份:2016
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ABCB5-positive stem cells for LSCD therapy
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10668673 - 财政年份:2016
- 资助金额:
$ 41.38万 - 项目类别:
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