Targeting PPT1 in the Tumor Microenvironment
Targeting PPT1 in the Tumor Microenvironment
批准号:
9791685
负责人:
RAVI K AMARAVADI
金额:
$48.22万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2008
资助国家:
美国
项目状态:
已结题
起止时间:
2008-04-01 至 2024-08-31
关键词:
3-DimensionalAcidityAcidsAddressAffectAnimalsAntimalarialsAntineoplastic AgentsAutologousAutophagocytosisBRAF geneBindingBiological AssayCell CommunicationCell DeathCell-Mediated CytolysisCellsCellular AssayChemicalsChloroquineClinicalClinical TrialsClustered Regularly Interspaced Short Palindromic RepeatsCollaborationsCritiquesDataEnzymesFamilyFibroblastsFutureGenetic studyGoalsHydroxychloroquineImmunocompetentImmunosuppressive AgentsImmunotherapyIn VitroKnock-outKnowledgeLeadLengthLipidsLiteratureLysosomesMEKsMalignant NeoplasmsMediatingMelanoma CellMetabolicModelingMolecular TargetNeoplasm MetastasisNormal CellNude MiceNutrientPathway interactionsPatient-Focused OutcomesPatientsPenetrationPharmaceutical PreparationsPhenotypePost-Translational Protein ProcessingPrimary NeoplasmProteinsQuinacrineRefractoryReportingResistanceRoleSLEB2 geneSignal TransductionSolubilityStressStructureT-Cell ActivationT-LymphocyteTestingThe Cancer Genome AtlasTumor ImmunityTumor-associated macrophagesWaterXenograft procedureagedanaloganti-canceraqueousbasecancer cellcancer therapycell typeclinical developmentcytotoxicitydimerimprovedin vivoin vivo evaluationinhibition of autophagyinhibitor/antagonistinnovationlipid transportmacrophagemelanomamouse modelneoplastic cellnew therapeutic targetnext generationnovelnovel therapeuticsoverexpressionpalmitoylationpreventresistance mechanismresponsetargeted treatmenttherapy resistantthioesterase PPT1 gene productthree dimensional cell culturetooltumortumor growthtumor microenvironmenttumorigenic
中文摘要
《项目摘要》--《项目2》
--
治疗黑色素瘤的耐药性仍然是提高患者存活率的一个主要障碍。这个新的项目将不会决定是否需要治疗。
通过靶向棕榈酰基硫代酯酶1(PPT1)来逆转抗药性。
自噬是一种溶酶体依赖的基因通路,它促进肿瘤的生长,并促进肿瘤对化疗药物的耐药性。
黑色素瘤。使用氯喹(CQ)及其衍生物进行自噬和抑制,可以增强许多抗癌药物的临床疗效。
治疗方法,但作为一种单一的药物,其活性仍然有限。两项涉及HCQ和黑色素瘤的临床试验显示。
这项活动前景看好,但也没有人对它的潜在效力提出担忧,因为人们对它的了解很少。
作用机制。我们已经准备好了二聚抗疟疾药物,它们的效力约为10-1000倍。
在体外和活体实验中,比起CQ和HCQ,二聚体和奎尼卡因药物(DQs)(Rebecca和癌症研究发现(2017))的作用更强。
二聚体和氯喹(DC)作为这两个工具,看起来都很有前途。
化合物是潜在的临床新药。在当前的药物周期中,我们还发现,延长连接子的长度是可能的。
在这些二聚体化合物中,它们可以增加溶酶体的定位能力和抗黑色素瘤的活性。
具有更长链接器的分布式控制系统以及CQ控制器也被用来拉动一个新的溶酶体基因靶标PPT1,这是一个新的靶标。
在癌症中过度表达,特别是在转移性肿瘤中。我们正在努力寻找新的靶点,包括溶酶体基因和自噬基因。
癌症细胞已经将注意力集中在癌症细胞内的副作用上,但最近的研究文献表明,他们的靶向是这一点。
TME系统内免疫抑制细胞内的途径也有助于增强抗肿瘤活性。我们将继续发挥杠杆作用。
与第一、第三和第四个项目进行创新合作,并从第一个P01核心项目中获得大力支持,以更好地理解这些项目。
PPT1的作用包括对肿瘤细胞的抑制作用,以及肿瘤细胞和成纤维细胞之间的相互作用。
相关的巨噬细胞和T细胞。这项提案是基于在回应中提供的广泛的和新的初步数据。
为了从2017年9月下旬提交的报告中删除审查员的批评意见,我们将继续测试这一假设,即有针对性。
PPT1在肿瘤细胞和巨噬细胞中的表达通过第三阶段的完成克服了对黑色素瘤耐药的治疗。
目标:Aim将通过在第一个连接子中引入新的杂原子和取代物来开发新的创新化合物。
并正在开发有史以来第一种二聚型铁喹及其衍生品,这在酸性地区可能是最好的渗透率。
我们还将开发一种全新的PPT1基因检测方法,该方法与其他活细胞和动物实验完全兼容。
2他们将利用P01小组内部的合作,研究PPT1小组在阻止老年人血脂和贩运方面的重要作用。
成纤维细胞可诱导黑色素瘤细胞分化,并逆转其对靶向化疗的耐药性。该公司将继续研究其临床疗效。
在3D培养中,PPT1对肿瘤细胞与T细胞和巨噬细胞的相互作用具有抑制作用,具有免疫活性。
鼠标模型,建立和建立一种新的有条件的Ppt1的KO模型,其主要目标是扭转对Ppt1的抵抗力。
免疫疗法。这些研究的主要影响将被用来揭开对免疫的更深层次和更机械性的理解。
溶酶体药物抑制的后果将在新的TME框架内公布,这将进一步支持这些药物的临床药物开发。
在未来,所获得的知识最终将有助于改善患者的治疗结果。
英文摘要
Project Summary – Project 2
Therapy resistance in melanoma is a major hurdle to improved survival. This project will determine if therapy
resistance can be reversed by targeting the lysosomal enzyme protein palmitoyl thioesterase 1 (PPT1).
Autophagy is a lysosome-dependent pathway that promotes tumor growth and resistance to therapy in
melanoma. Autophagy inhibition with chloroquine (CQ) derivatives augments the efficacy of many anticancer
therapies, but has limited activity as a single agent. Clinical trials involving HCQ in melanoma show
promising activity but concerns have been raised about the potency of HCQ, and its poorly understood
mechanism of action. We have prepared dimeric antimalarial compounds that are 10-1000 fold more potent
in vitro and in vivo than CQ or HCQ. Dimeric quinacrines (DQs) (Rebecca Cancer Discovery 2017) and
dimeric chloroquines (DCs) (Rebecca Cancer Discovery in revision) look especially promising as both tool
compounds and potential clinical drugs. In the current cycle, we have found that extending the linker length
of these dimeric compounds increases lysosomal localization and anti-melanoma activity. These DQs and
DCs with longer linkers as well as CQ were used to pull a new lysosomal target, PPT1, which is
overexpressed in cancer, especially in metastatic lesions. Efforts to target the lysosome and autophagy in
cancer cells have focused on the effects within cancer cells but recent literature suggests targeting this
pathway in immunosuppressive cells within the TME also contributes to antitumor activity. We will leverage
innovative collaborations with Projects 1, 3 and 4 and heavy support from the P01 cores to understand the
effects of PPT1 inhibition in both tumor cells, the interaction between tumor cells and fibroblasts, tumor
associated macrophages and T cells. The proposal is based on extensive new preliminary data in response
to the reviewers’ critiques from the September 2017 submission. We will test the hypothesis that targeting
PPT1 in tumor cells and macrophages overcomes therapy resistance in melanoma through completion of 3
aims: Aim 1 will develop innovative new compounds by introducing heteroatom substitutions into the linker,
and developing the first ever dimeric ferroquine derivatives that could have better penetration in the acidic
TME. We will also develop a novel assay for PPT1 that is compatible with live cells and animal studies. Aim
2 will leverage collaborations within the P01 to study the role of PPT1 in blocking lipid trafficking from aged
fibroblasts to melanoma cells and reversing resistance to targeted therapy. Aim 3 will study the effects of
PPT1 inhibition on tumor cell interactions with T cells and macrophages in 3D culture, immunocompetent
mouse models, and a new conditional KO model of Ppt1, with the goal of reversing resistance to
immunotherapy. The impact of these studies will be to unravel a deeper mechanistic understanding of the
consequences of lysosomal inhibition within the TME, which will support clinical development of these agents
in the future. Knowledge gained will ultimately lead to improved patient outcomes.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Resistance mechanisms to autophagy-modulating therapies
-
批准号:10345115
-
项目类别:
-
资助金额:$66.99万
-
财政年份:2022
-
负责人:RAVI K AMARAVADI
-
依托单位:
Resistance mechanisms to autophagy-modulating therapies
-
批准号:10565868
-
项目类别:
-
资助金额:$64.12万
-
财政年份:2022
-
负责人:RAVI K AMARAVADI
-
依托单位:
Targeting autophagy to enhance immune checkpoint inhibition
-
批准号:10480852
-
项目类别:
-
资助金额:$44.6万
-
财政年份:2021
-
负责人:RAVI K AMARAVADI
-
依托单位:
SPORE in Skin Cancer
-
批准号:10480828
-
项目类别:
-
资助金额:$219.42万
-
财政年份:2021
-
负责人:RAVI K AMARAVADI
-
依托单位:
Targeting autophagy to enhance immune checkpoint inhibition
-
批准号:10268745
-
项目类别:
-
资助金额:$47.05万
-
财政年份:2021
-
负责人:RAVI K AMARAVADI
-
依托单位:
SPORE in Skin Cancer
-
批准号:10268740
-
项目类别:
-
资助金额:$232.39万
-
财政年份:2021
-
负责人:RAVI K AMARAVADI
-
依托单位:
Molecular mechanisms of BRAF inhibitor induced UPR and autophagy
-
批准号:8945350
-
项目类别:
-
资助金额:$36.6万
-
财政年份:2015
-
负责人:RAVI K AMARAVADI
-
依托单位:
Molecular mechanisms of BRAF inhibitor induced UPR and autophagy
-
批准号:9131669
-
项目类别:
-
资助金额:$36.6万
-
财政年份:2015
-
负责人:RAVI K AMARAVADI
-
依托单位:
Molecular mechanisms of BRAF inhibitor induced UPR and autophagy
-
批准号:9768184
-
项目类别:
-
资助金额:$35.5万
-
财政年份:2015
-
负责人:RAVI K AMARAVADI
-
依托单位:
HLTF gene silencing: a novel determinant of sensitivity to autophagy inhibition
-
批准号:8664818
-
项目类别:
-
资助金额:$33.24万
-
财政年份:2013
-
负责人:RAVI K AMARAVADI
-
依托单位:
HLTF gene silencing: a novel determinant of sensitivity to autophagy inhibition
-
批准号:8843267
-
项目类别:
-
资助金额:$31.29万
-
财政年份:2013
-
负责人:RAVI K AMARAVADI
-
依托单位:
HLTF gene silencing: a novel determinant of sensitivity to autophagy inhibition
-
批准号:8506754
-
项目类别:
-
资助金额:$42.38万
-
财政年份:2013
-
负责人:RAVI K AMARAVADI
-
依托单位:
Autophagy inhibition as a therapeutic strategy for glioblastoma mutliforme
-
批准号:7914693
-
项目类别:
-
资助金额:$31.17万
-
财政年份:2009
-
负责人:RAVI K AMARAVADI
-
依托单位:
Therapeutic approaches that target cancer cell metabolism
-
批准号:8321607
-
项目类别:
-
资助金额:$13.73万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
Targeting PPT1 in the Tumor Microenvironment
-
批准号:10471234
-
项目类别:
-
资助金额:$48.1万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
Therapeutic approaches that target cancer cell metabolism
-
批准号:7686305
-
项目类别:
-
资助金额:$13.73万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
Therapeutic approaches that target cancer cell metabolism
-
批准号:8128677
-
项目类别:
-
资助金额:$13.73万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
Therapeutic approaches that target cancer cell metabolism
-
批准号:7385323
-
项目类别:
-
资助金额:$13.73万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
Autophagy inhibition as a therapeutic strategy for glioblastoma mutliforme
-
批准号:7469685
-
项目类别:
-
资助金额:$36.91万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
Targeting PPT1 in the Tumor Microenvironment
-
批准号:10019500
-
项目类别:
-
资助金额:$38.94万
-
财政年份:2008
-
负责人:RAVI K AMARAVADI
-
依托单位:
海外基金