BBOX1 is a Novel Oncogenic Driver in Triple Negative Breast Cancer

BBOX1 是三阴性乳腺癌的新型致癌驱动因素

基本信息

批准号：
10393664
负责人：
Qing Zhang
金额：
$ 39.39万
依托单位：
UT SOUTHWESTERN MEDICAL CENTER
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：
2021-04-15 至 2026-03-31
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10393664
关键词：
3-Dimensional Affect Agar Anabolism Binding Biochemical Reaction Biological Assay Breast Breast Cancer Cell Breast Cancer Genetics Breast Cancer Patient Breast Cancer cell line Breast Cancer therapy Breast Epithelial Cells Calcium Calcium Channel Calcium Signaling Carnitine Cell Proliferation Cells Clinical Custom D Cells DNA Data Defect Development Disease Distant Metastasis ERBB2 gene Endoplasmic Reticulum Enzyme Inhibitor Drugs Enzymes Epithelial Cell Proliferation Family Family member Foundations Glycolysis Growth Hypoxia Impairment In Vitro Inositol Levocarnitine Libraries Malignant Neoplasms Mediating Metabolism Mitochondria Mixed Function Oxygenases Molecular Oncogenic Oxygen Pathogenesis Pathway interactions Patient-derived xenograft models of breast cancer Patients Pharmacology Phenotype Process Procollagen-Proline Dioxygenase Prognosis Proteins Recording of previous events Reporting Respiration Role Signal Transduction Small Interfering RNA Testing Therapeutic Tissue Microarray Ubiquitination Xenograft Model Xenograft procedure alpha ketoglutarate cell growth clinically relevant efficacy testing experimental study fitness histone demethylase in vivo inhibitor knock-down malignant breast neoplasm mortality new therapeutic target novel novel therapeutics orthotopic breast cancer overexpression patient derived xenograft model prevent receptor screening therapeutic target triple-negative invasive breast carcinoma tumor growth tumor metabolism tumorigenesis

项目摘要

Project Summary Triple-Negative breast cancer (TNBC), which accounts for 15-20% of all breast cancer, represents an aggressive clinical history, development of distant metastasis, shorter survival and high mortaility rate compared with other subtypes of breast cancer. It is imperative to identity new therapeutic targets that are actionale in TNBC. Our lab has been focusing on studying a family of enzymes that uses oxygen, Fe2+ and 2-oxoglutarate (2-OG) for their enzymatic reactions. This enzyme family has been reported to be involved in the pathogenesis of cancers. We generated the custom siRNA library for all of 2-OG dependent enzymes and developed a stringent screening strategy by combining the functional readouts from both 2-D cell proliferation and 3-D soft agar growth assay with TNBC breast cancer cell lines. Our preliminary data show that gamma-butyrobetaine hydroxylase 1 (BBOX1) involved in carnitine biosynthesis pathway is essential for TNBC cell proliferation on 2-D and 3-D. Mechanistically, we show that BBOX1 binds with the calcium channel inositol-1,4,5-trisphosphate receptor type 3 (IP3R3), therefore promoting calcium release, mitochondrial function and glycolysis in TNBC. We hypothesize that BBOX1-IP3R3 signaling axis promotes TNBC by inducing calcium release and tumor metabolism. This is the first study directed at a pro-oncogenic function for BBOX1 in cancer, with our focus in TNBC. In Specific Aim 1, we will characterize the functional significance of BBOX1-IP3R3 signaling in TNBC. In Specific Aim 2, we will elucidate the molecular mechanism by which BBOX1-IP3R3 signaling promotes oncogenic phenotypes in TNBC. In Specific Aim 3, we will assess the therapeutic implications of targeting BBOX1 in TNBC xenografts and patient derived xenografts (PDXs). Successful completion of this proposal would establish the role of BBOX1 as a new oncogenic driver in TNBC and explore its therapeutic potential in this lethal disease.

项目摘要占所有乳腺癌的15-20％的三阴性乳腺癌（TNBC）代表了一种侵略性与其他乳腺癌的亚型。必须认同是TNBC中的Actionale的身份新的治疗靶标。我们的实验室一直专注于研究使用氧气，Fe2+和2-氧化甲酸（2-OG）的酶家族酶促反应。据报道，该酶家族与癌症的发病机理有关。我们为所有2-OG依赖性酶生成了自定义siRNA库，并开发了严格的筛选通过结合来自2-D细胞增殖和3-D软琼脂生长测定的功能读数的策略与TNBC乳腺癌细胞系。我们的初步数据表明，伽马甲丁烷羟化酶1 （Bbox1）参与肉碱生物合成途径对于2-D和3-D上的TNBC细胞增殖至关重要。从机械上讲，我们表明Bbox1与钙通道肌醇1,4,5-三磷酸受体结合 3型（IP3R3），因此在TNBC中促进钙释放，线粒体功能和糖酵解。我们假设Bbox1-IP3R3信号轴通过诱导钙释放和肿瘤促进TNBC 代谢。这是第一个针对癌症中Bbox1促进功能功能的研究，我们的重点是 TNBC。在特定的目标1中，我们将表征TNBC中Bbox1-IP3R3信号传导的功能意义。在特定的目标2，我们将阐明Bbox1-IP3R3信号促进的分子机制 TNBC中的致癌表型。在特定目标3中，我们将评估靶向的治疗含义 TNBC异种移植物和患者衍生异种移植物（PDXS）中的Bbox1。成功完成此提案将在TNBC中确立Bbox1作为新的致癌驱动力的作用，并在这种致命中探索其治疗潜力疾病。