AI-based genetic discovery for hearing loss

基于人工智能的听力损失基因发现

• 批准号: 10708476
• 负责人: GARY A PELTZ
• 金额: $ 65.96万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-16 至 2028-05-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10708476
• 关键词: Ablation; Acceleration; Alleles; Auditory; Auditory system; Candidate Disease Gene; Clustered Regularly Interspaced Short Palindromic Repeats; Cochlea; DNA Sequence Alteration; Data; Databases; Ear; Elderly; Engineering; Environment; Evaluation; Exons; Gene Expression; Gene Expression Profiling; Genes; Genetic; Genome; Genome engineering; Genomics; Goals; Health; Homologous Gene; Human; Human Genetics; Inbred Strain; Inbred Strains Mice; Individual; Knock-in; Knock-in Mouse; Knock-out; Knowledge; Laboratory mice; Methods; Modeling; Morphology; Mus; Mutation; Noise-Induced Hearing Loss; Phenotype; Presbycusis; Probability; Resources; Series; Shapes; Stretching; Variant; candidate identification; computational pipelines; computerized tools; genetic effector; genetic variant; genome wide association study; hearing impairment; improved; interest; model organism; mouse genetics; mouse genome; mouse model; novel; prevent; trait

Abstract Age-related hearing loss is one of the most common conditions in the elderly. Many genetic factors for hearing loss have been identified, but many more remain to be identified; and our lack of knowledge about the mechanisms by which they cause hearing loss is a barrier that must be overcome if we are to develop methods for preventing (or reversing) age-related hearing loss. No model organism has contributed more than the laboratory mouse to improving human health, and mouse models have shaped our understanding of the mammalian auditory system. Mice with genetic mutations have been used to identify genes that are critical for auditory function, and for characterizing human genetic factors that cause hearing loss. A spontaneous hearing loss with an oligogenic basis develops in several well-studied inbred mouse strains (A/J, DBA/2J, MA/My, NOD/LtJ, NOR/LtJ, C57BR/cdJ, C57L/J). Our recently developed AI-based computational pipeline (GNNHap) identified four causative genetic factors for spontaneous hearing loss in three strains (A/J, DBA/2, NOD/LtJ). However, to accelerate the pace of genetic discovery for hearing loss, this project will enhance our AI by enabling it to analyze structural variant alleles present in the genomes of inbred strains, and by adding three computational capabilities for prioritizing candidate genes. The enhanced AI will be able to: (i) determine if alleles within the human homologues of identified mouse candidate genes were associated with hearing loss in human GWAS; (ii) analyze a phenotypic database to determine if a mouse line with a knockout of a candidate gene has impaired hearing; and (iii) analyze gene expression data in the Gene Expression Analysis Resource (gEAR) to determine whether identified candidate murine genes (and their human homologues) are expressed in the ear. The enhanced computational tool will then be used to identify genetic factors for hearing loss in four strains (MA/My, NOR/LtJ, C57BR/cdJ, C57L/J). Since it is critical to characterize genetic effector mechanisms, state of the art genome engineering is used to generate knockin (KI) mice, which have a reversion of a causative genetic factor for hearing loss to wild type. A detailed evaluation of these KI mice is performed to characterize the individual (and combined) effect of these mutations on hearing loss and cochlear morphology. Characterization of their genetic effector mechanisms will reveal how a set of interacting oligogenic factors produce a spontaneous hearing loss. As a stretch goal, we will use some of these KI mice to determine if we can develop a novel gene x environment model for noise- induced hearing loss.

摘要 听力损失是老年人最常见的疾病之一。听力的许多遗传因素 损失已经确定，但仍有更多的损失有待确定;我们缺乏对 它们导致听力损失的机制是一个必须克服的障碍，如果我们要开发方法， 预防（或逆转）与年龄相关的听力损失。没有模式生物的贡献超过 实验室小鼠改善人类健康，小鼠模型塑造了我们对 哺乳动物的听觉系统带有基因突变的小鼠已经被用来识别对人类免疫系统至关重要的基因。 听觉功能，以及表征导致听力损失的人类遗传因素。 在几个研究充分的近交系小鼠品系中发现了一种具有寡基因基础的自发性听力损失 （A/J、DBA/2J、MA/My、NOD/LtJ、NOR/LtJ、C57BR/cdJ、C57L/J）。我们最近开发的基于人工智能的 计算管道（GNNHap）确定了四个导致自发性听力损失的遗传因素， 3株（A/J、DBA/2、NOD/LtJ）。然而，为了加快听力损失基因发现的步伐， 该项目将通过使其能够分析近交系基因组中存在的结构变异等位基因来增强我们的人工智能 菌株，并通过增加三个计算能力，优先考虑候选基因。增强的AI将 能够：（i）确定所鉴定的小鼠候选基因的人类同源物内的等位基因是否 与人类GWAS中的听力损失相关;（ii）分析表型数据库以确定小鼠品系是否与人类GWAS中的听力损失相关。 （iii）分析候选基因敲除的人中的基因表达数据， 表达分析资源（gene），以确定所鉴定的候选鼠基因（及其表达水平）是否与基因组的表达水平相关。 人同源物）在耳中表达。然后，增强的计算工具将用于识别 MA/My、NOR/LtJ、C57 BR/cdJ、C57 L/J四个品系的听力损失的遗传因素。因为这对 为了表征遗传效应器机制，使用最先进的基因组工程来产生敲入， (KI)小鼠，其具有导致听力损失的遗传因子向野生型的逆转。详细 进行这些KI小鼠的评价以表征这些化合物的单独（和组合）作用 听力损失和耳蜗形态的突变。其遗传效应机制的表征将 揭示了一组相互作用的寡基因因素如何导致自发性听力损失。作为一个延伸目标，我们 将使用其中的一些KI小鼠来确定我们是否可以开发一种新的基因x环境模型，用于噪音- 听力损失