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Therapeutic Targeting Mitochondrial C1 Metabolism

靶向线粒体 C1 代谢的治疗

基本信息

批准号：
10541877
负责人：
Charles E. Dann
金额：
$ 60.22万
依托单位：
WAYNE STATE UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2021
资助国家：
美国
起止时间：
2021-01-01 至 2025-12-31
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10541877
关键词：
Acute Anabolism Antineoplastic Agents Biological Assay Cancer cell line Carbon Cell membrane Cells Characteristics Clinical Trials Collaborations Colon Carcinoma Colorectal Cancer Coupled Cytosol Development Disease Disease remission Dose Drug Delivery Systems Drug Kinetics Drug Transport Enzymes Epithelial Cells Epithelial ovarian cancer Equilibrium Evaluation Exhibits FDA approved FRAP1 gene Genetically Engineered Mouse Glutathione Glycine Glycine Hydroxymethyltransferase Human Hydroxymethyltransferases Hypoxia In Vitro In complete remission KPC model KRAS2 gene Lead Malignant Neoplasms Malignant neoplasm of pancreas Measures Metabolic Metabolic Pathway Metabolism Mitochondria Modeling Molecular Mus Non-Small-Cell Lung Carcinoma Nucleotide Biosynthesis Nutrient Oxidation-Reduction Pancreas Partial Remission Pathway interactions Pemetrexed Pharmaceutical Chemistry Pharmacology Pharmacy (field)Prognostic Factor Proliferating Protons Purines Pyrimidine Reactive Oxygen Species Recovery Regulation Research Respiration Ribonucleotides Role SLC19A1 gene Series Serine Severe Combined Immunodeficiency Signal Transduction Source Structure Survivors Testing Time Toxic effect Transplantation X-Ray Crystallography Xenograft Model Xenograft procedure advanced disease analog antitumor agent cancer care cancer cell clinical care clinically relevant drug discovery drug metabolism efficacy trial gemcitabine glycine amide in vivo in vivo evaluation inhibitor lead optimization metabolomics mouse model mutant nanomolar new therapeutic target novel novel strategies pancreatic cancer cells pancreatic cancer model pancreatic cancer patients patient derived xenograft model preclinical study prototype standard of care structural biology therapeutic target thymidylate tumor tumor growth tumor microenvironment uptake

项目摘要

ABSTRACT Metabolic reprogramming is an important hallmark of cancer. Of the altered metabolic pathways associated with malignancy, one-carbon (C1) metabolism is particularly notable. The 3-carbon of serine is the major C1 donor for de novo synthesis of purines and thymidylate in the cytosol, and the primary catabolic pathway for serine and synthesis of glycine occurs in the mitochondria. The mitochondrial C1 pathway also generates reducing equivalents and is an important source of ATP. The first enzyme of the mitochondrial C1 pathway, serine hydroxymethyltransferase (SHMT) 2, is an oncodriver which is upregulated in a substantial number of cancers. Growing evidence suggests that SHMT2 could be an independent prognostic factor and an important therapeutic target for cancer. We discovered novel 5-substituted pyrrolo[3,2-d]pyrimidine compounds AGF291, AGF347, and AGF359. Following their internalization by the proton-coupled folate transporter (PCFT), these compounds inhibit mitochondrial C1 metabolism at SHMT2, with direct secondary inhibitions of cytosolic targets in de novo purine (DNP) biosynthesis (at 5-aminoimidazole-4-carboxamide ribonucleotide formyltransferase and glycinamide ribonucleotide formyltransferase) and SHMT1. Our compounds inhibit proliferation of epithelial ovarian cancer, non-small cell lung cancer, colorectal cancer, and pancreatic cancer (PaC) cells, suggesting their potential as broad-spectrum anti-tumor agents. AGF347 exhibited significant in vivo antitumor efficacy with potential for complete responses against both early and upstage PaC xenograft models. We posit that our novel compounds offer an entirely new approach for treating cancer. Our objective is to optimize our lead structures for tumor targeting via PCFT and inhibition of mitochondrial and cytosolic C1 metabolism at modest doses with minimal toxicity. We will use PaC as a disease prototype for further development of our novel multi-targeted inhibitors. In Aim 1, we will synthesize up to 100 compounds based on lead compounds to optimize uptake by tumors, and inhibition of SHMT2 and cytosolic pathways including DNP biosynthesis. In Aim 2, we will test analogs from Aim 1 for antitumor potencies toward clinically relevant PaC cell lines, tumor selectivity and plasma membrane and mitochondrial drug transport, drug metabolism, and inhibition of SHMT2 and cytosolic pathways including DNP biosynthesis. We will measure downstream impacts on mTOR signaling, mitochondrial respiration, glutathione pools, and reactive oxygen species. In Aim 3, we will evaluate pharmacokinetics, tolerability, and in vivo antitumor activities of compounds from Aims 1 and 2 by toxicity/efficacy trials with human PaC cell line xenograft and PDX models, and with the KPC mouse PaC model. Our lead analogs are “first-in-class” and our proposed studies will afford optimized compounds with the best balance of selective tumor targeting and anti-tumor efficacy, resulting from inhibition of SHMT2 and downstream anabolic pathways. We anticipate developing SHMT2/DNP-targeted compounds for IND submission and clinical trials based on our studies.

摘要代谢重编程是癌症的一个重要标志。与之相关的代谢途径的改变对于恶性肿瘤，一碳(C1)代谢尤其显著。丝氨酸的3-碳是主要的C1 在胞浆中从头合成嘌呤和胸苷的供体，以及主要的分解代谢途径丝氨酸和甘氨酸的合成存在于线粒体中。线粒体C_1途径也会产生减少当量，是三磷酸腺苷的重要来源。线粒体C1途径的第一种酶，丝氨酸羟甲基转移酶(SHMT)2是一种癌基因，在许多癌症。越来越多的证据表明，SHMT2可能是一个独立的预后因素和一个重要的癌症的治疗靶点。我们发现了新的5-取代吡咯并[3，2-d]嘧啶化合物AGF291， AGF347和AGF359。在它们被质子偶联叶酸转运体(PCFT)内化后，这些化合物在SHMT2抑制线粒体C1代谢，对胞质具有直接次级抑制作用从头合成嘌呤(DNP)的靶点(5-氨基咪唑-4-甲酰胺核糖核苷酸甲酰转移酶和甘氨酰胺核糖核酸甲酰转移酶)和SHMT1。我们的化合物能抑制上皮性卵巢癌、非小细胞肺癌、结直肠癌和胰腺癌的增殖 (PAC)细胞，表明其作为广谱抗肿瘤药物的潜力。AGF347在对早期和晚期PAC异种移植有潜在完全反应的体内抗肿瘤效果模特们。我们认为，我们的新化合物为治疗癌症提供了一种全新的方法。我们的目标是优化我们的先导结构，通过PCFT和抑制线粒体和胞浆靶向肿瘤在适度剂量下代谢，毒性最小。我们将使用PAC作为疾病的原型，以进一步我们的新型多靶点抑制剂的开发。在目标1中，我们将合成多达100个基于关于先导化合物，以优化肿瘤的摄取，以及抑制SHMT2和胞浆途径，包括 DNP生物合成。在目标2中，我们将测试来自目标1的类似物对临床相关的抗肿瘤效力。 PAC细胞系，肿瘤选择性和质膜及线粒体药物转运，药物代谢，以及抑制SHMT2和胞浆途径，包括DNP的生物合成。我们将衡量下游影响对mTOR信号、线粒体呼吸、谷胱甘肽池和活性氧物种的影响。在目标3中，我们将评估AIMS 1和AIMS 2化合物的药代动力学、耐受性和体内抗肿瘤活性使用人PAC细胞系异种移植和PDX模型以及KPC小鼠PAC模型进行毒性/疗效试验。我们的先导类似物是“一流的”，我们建议的研究将提供最好的优化化合物。 SHMT2和SHMT2抑制导致的选择性肿瘤靶向和抗肿瘤效果之间的平衡下游的合成代谢途径。我们预计将开发用于IND的SHMT2/DNP靶向化合物根据我们的研究提交和临床试验。