Regulation, function, and the therapeutic potential of an oncogenic long noncoding RNA lnc-HLX-2-7 in group 3 medulloblastomas

致癌长链非编码 RNA lnc-HLX-2-7 在第 3 组髓母细胞瘤中的调节、功能和治疗潜力

• 批准号: 10661070
• 负责人: Ranjan Joseph Perera
• 金额: $ 41.76万
• 依托单位: JOHNS HOPKINS UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-15 至 2027-06-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10661070
• 关键词: 3-Dimensional; Address; Affect; Antisense Oligonucleotides; Binding Proteins; Brain; Brain Neoplasms; CRISPR/Cas technology; Cell Proliferation; Cell physiology; Cells; Central Nervous System Neoplasms; Cerebellum; Cerebrospinal Fluid; Child; Cisplatin; Citric Acid Cycle; Clinical; Clinical Treatment; Data; Data Set; Development; Diagnosis; Disease; Enzymes; Epigenetic Process; Experimental Models; Foundations; Gene Expression Profile; Genes; Genetic; H2 gene; Hematopoietic Neoplasms; Homeobox; Human; Immunocompromised Host; Individual; Induction of Apoptosis; Invaded; Machine Learning; Malignant Neoplasms; Mediating; Metabolic; Metabolic Pathway; Molecular; Morbidity - disease rate; Mus; Neoplasm Metastasis; Nicotinamide adenine dinucleotide; Oligonucleotides; Oncogenes; Oncogenic; Parents; Pathway interactions; Patients; Pharmaceutical Preparations; Play; Pre-Clinical Model; Preclinical Testing; Primary Neoplasm; Production; Prognosis; RNA-Binding Proteins; Recurrence; Regulation; Regulator Genes; Regulatory Element; Resistance; Role; Safety; Secondary to; Signal Pathway; Subgroup; Testing; Therapeutic; Therapeutic Intervention; Time; Treatment Side Effects; Untranslated RNA; Up-Regulation; Work; aggressive therapy; cancer type; cerium oxide nanoparticle; gene regulatory network; genetic signature; genomic locus; human disease; human model; in vivo; inhibitor; innovation; insight; lead candidate; medulloblastoma; molecular targeted therapies; mortality; mouse model; nanoparticle; nicotinamide phosphoribosyltransferase; novel; overexpression; particle; pre-clinical; resistance mechanism; response; spatiotemporal; targeted agent; therapeutic evaluation; therapeutic target; therapeutically effective; transcription factor; transcriptome sequencing; treatment response; tumor; tumor growth; tumor metabolism; tumor progression

Project Summary Brain tumors are relatively common in children, with medulloblastoma (MB) the most frequent type, especially in children under five. MBs can spread through the cerebrospinal fluid, and metastases are common at the time of diagnosis. Some of the regulatory genes, signaling pathways, and gene regulatory networks in MB are known, but the role of non-coding RNAs in MB, particularly long non-coding RNAs (lncRNAs), are poorly described. By applying machine learning to publicly available RNA-seq datasets, we found that lnc-HLX2-7 was highly upregulated and specific for difficult-to-treat and poor prognosis grade 3 (G3) MBs compared with other molecular subgroups. CRISPR-Cas9 depletion of lnc-HLX-2-7 in G3 MB cells significantly reduced cell proliferation, invasion, and 3D colony formation and induced apoptosis. When lnc- HLX-2-7-deleted G3 MB cells were injected into the mouse cerebellum, they produced considerably smaller tumors than those derived from parental cells. Further, cerium oxide nanoparticle-coated antisense oligonucleotides (ASOs) against lnc-HLX2-7 reduced in vivo tumor growth. Our preliminary results also demonstrate that lnc-HLX-2-7 is a critical MB metabolic regulator that modulates NAD+ (nicotinamide adenine dinucleotide) via nicotinamide phosphoribosyltransferase (NAMPT), a key enzyme mediating NAD+ production. The above results highlight the functional impact of lnc-HLX-2-7 on G3 MB development, some of the underlying mechanisms of action, and its importance as a therapeutic target. Our central hypothesis is that lnc-HLX-2-7 is an important oncogenic molecule that can be therapeutically targeted in G3 MBs. We propose the following three Specific Aims to test our hypothesis: (a) to test pre-clinical therapeutics targeting G3 MBs; (b) to delineate the lnc-HLX-2-7-driven molecular mechanisms underlying G3 MB tumors, and (c) to identify how lnc-HLX-2-7 is regulated and regulates other genes in G3 MBs. This study will provide valuable mechanistic insights into how lnc-HLX-2-7 drives G3 MB development, advance pre-clinical therapeutic targeting of this challenging subgroup, and anticipate compensatory and resistance mechanisms. This study provides important insights into how lncRNAs function as critical oncogenes in the brain and other cancers.

项目摘要 脑肿瘤在儿童中相对常见，髓母细胞瘤（MB）最常见 类型，尤其是在五岁以下的儿童中。 MB可以通过脑脊液扩散，并且 转移在诊断时很常见。一些调节基因，信号传导 MB中的途径和基因调节网络是已知的，但是非编码RNA在 MB，尤其是长期非编码RNA（LNCRNA）的描述很差。通过应用机器 学习公开可用的RNA-seq数据集，我们发现LNC-HLX2-7高度上调 与其他相比 分子亚组。 G3 MB细胞中LNC-HLX-2-7的CRISPR-CAS9耗竭明显 细胞增殖，侵袭和3D菌落形成并诱导凋亡。当lnc-- 将HLX-2-7删除的G3 MB细胞注入小脑小脑，它们产生 比从亲本细胞衍生的肿瘤小得多。此外，氧化葡萄 纳米颗粒涂层的反义寡核苷酸（ASO）针对LNC-HLX2-7减少体内肿瘤 生长。我们的初步结果还表明LNC-HLX-2-7是关键的MB代谢 调节NAD+（烟酰胺腺嘌呤二核苷酸）的调节器通过烟酰胺 磷酸贝糖基转移酶（NAMPT），一种介导NAD+产生的关键酶。以上 结果突出了LNC-HLX-2-7对G3 MB发育的功能影响，其中一些 基本的作用机制及其作为治疗靶点的重要性。我们的中心 假设是LNC-HLX-2-7是一个重要的致癌分子，可以在治疗上 以G3 MB为目标。我们提出以下三个特定旨在检验我们的假设的特定旨在：（a） 测试针对G3 MB的临床前治疗剂； （b）描绘LNC-HLX-2-7驱动的分子 G3 MB肿瘤的基础机制，以及（c）确定如何调节LNC-HLX-2-7并 调节G3 MB中的其他基因。这项研究将提供有价值的机理见解 LNC-HLX-2-7驱动G3 MB开发，提前临床前治疗靶向。 挑战亚组，并预测补偿性和抵抗机制。这项研究 关于LNCRNA如何充当大脑和其他的关键癌基因的重要见解 癌症。