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Role of AMPK in melanoma brain metastasis

AMPK 在黑色素瘤脑转移中的作用

基本信息

批准号：
10567049
负责人：
Vashisht G Yennu Nanda
金额：
$ 49.92万
依托单位：
MASSACHUSETTS GENERAL HOSPITAL
依托单位国家：
美国
项目类别：
财政年份：
2023
资助国家：
美国
起止时间：
2023-01-01 至 2023-08-01
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10567049
关键词：
5&apos -AMP-activated protein kinase ATP Citrate (pro-S)-Lyase Address Anchorage-Independent Growth BRAF gene Biguanides Biology Brain Catalytic Domain Cell model Cephalic Cessation of life Clinical Complex Computational Biology Cutaneous Melanoma Diabetes Mellitus Disease Disseminated Malignant Neoplasm Drug Targeting Enzymes Genes Genetically Engineered Mouse Growth Homeostasis Human Immune Immunotherapy Knock-out Knowledge MEKs Malignant Neoplasms Melanoma Cell Memorial Sloan-Kettering Cancer Center Metabolic Metabolism Metastatic Melanoma Metastatic malignant neoplasm to brain Metformin Mitochondria Modeling Monitor Mus Mutate Mutation NF1 gene NF1 mutation Neoplasm Metastasis Nude Mice Oncologist Oxidative Phosphorylation Pathway interactions Patients Pharmaceutical Preparations Phase I Clinical Trials Phenformin Phosphorylation Inhibition Proliferating Regulation Reporting Research Personnel Role Sampling Signal Pathway Signal Transduction Soft Agar Assay Solid Neoplasm Surgeon The Cancer Genome Atlas Therapeutic Therapeutic Effect Tumor Promotion University of Texas M D Anderson Cancer Center Xenograft Model Xenograft procedure cancer cell cancer genomics cancer survival cellular targeting cost estimate genomic data immune checkpoint blockade inhibitor insight lipid biosynthesis melanoma metabolomics mouse model mutant new therapeutic target novel novel therapeutic intervention phase 1 study pre-clinical response sensor single-cell RNA sequencing subcutaneous targeted treatment therapeutically effective tumor tumor metabolism tumor progression tumor xenograft years of life lost

项目摘要

Project Summary: AMP activated protein kinase (AMPK) is a critical evolutionarily conserved energy sensor that regulates energy homeostasis by monitoring changes in the intracellular AMP or ADP to ATP ratios. Mounting evidence supports that the AMPK pathway is one of the major signaling players at the interface of metabolism and cancer. However, the role of AMPK in tumor progression and metastasis remains obscure. Our recent analysis on melanoma cancer genomics data has revealed that the mutations in the PRKAA2 gene, which encodes the alpha 2 catalytic subunit of AMPK, occur in 8-10% of cutaneous melanomas and tend to co-occur with NF1 mutations. In our preliminary studies, we found that knockout of AMPKα2 promoted anchorage-independent growth of mutant NF1-melanoma cells in soft agar assays and their growth as xenografted tumors in nude mice. Importantly, we found that expression of AMPKα2 is significantly downregulated in human melanoma brain metastasis samples compared to patient-matched extracranial metastasis samples. Furthermore, knockout of AMPKα2 promoted brain metastasis of NF1-mutant Mewo melanoma cells in nude mice. Based on these preliminary results, we hypothesize that inactivation of AMPKα2 in melanoma promotes tumor progression to melanoma brain metastasis. In Aim 1, we will establish the role of AMPKα2 in melanoma brain metastasis using mouse models and human samples. We plan to characterize the effects of AMPKα2 loss in both syngeneic and genetically engineered mouse models. Human melanoma brain metastasis samples will be used to explore the contribution of AMPKα2 loss through spatial single cell RNA-seq analyses. In aim 2, we will characterize downstream targets of AMPK involved in the metabolic regulation of melanoma brain metastasis. We will investigate the contribution of a novel putative substrate of AMPKα2 involved in de novo lipogenesis, identified in our preliminary studies, to melanoma brain metastasis, and explore additional new AMPKα2 targets through comprehensive metabolomics and RPPA analyses of tumor samples from mouse models. In aim 3, we will assess the therapeutic effects of metabolic drugs targeting the AMPK pathway on enhancing the efficacies of targeted- and immune- therapies in melanoma brain metastasis using human melanoma xenografts, syngeneic and genetically engineered mouse models. To achieve these aims, we have assembled a team of investigators with various expertise including cancer cell metabolism, melanoma brain metastasis biology, melanoma oncologists/surgeon and computational biology. Our study will not only provide critical insights into the role of AMPK metabolic signaling in melanoma brain metastasis addressing a significant knowledge gap in the field, but also identify novel therapeutic approaches to target melanoma brain metastasis.

项目总结: