MicroRNA buffering of gene duplications and aneuploidy

非整倍体和大规模的染色体复制是许多细胞系的共同特征，包括那些来自癌症的细胞系。尽管这些大规模的基因组变化，这些细胞系仍然存活。因此，缓冲基因复制和缺失影响的细胞过程是细胞活力的关键。microrna是通过翻译抑制调节基因功能的短RNA分子，通常被描述为基因剂量的缓冲剂。该项目将使用计算和遗传方法的结合来研究microrna作为基因和染色体复制缓冲的作用。我们将分析可用的细胞系基因组中常见的蛋白质编码基因和microRNA的丢失和重复，以及可用的转录组学数据作为基因和microRNA表达数据的来源。我们将提出以下问题：1。在不同的细胞系中，常见的蛋白质编码和microRNA基因是否被复制或丢失？在细胞系中复制或丢失的基因或多或少可能成为microrna的目标？microRNA和/或靶基因的重复对它们的表达水平有什么影响？我们将操纵microrna及其靶基因的表达，模拟来自各种动物系统（包括癌细胞系）的细胞系中基因复制的影响。各种检测将用于评估microRNA和靶基因对缓冲基因复制和非整倍体的贡献。了解microrna如何缓冲非整倍体的后果将为了解细胞活力（包括癌症等疾病）和基因复制的后果提供关键见解。

Aneuploidy and large-scale chromosomal duplications are common characteristics of many cell lines, including those derived from cancers. Despite these large-scale genome changes, these cell lines remain viable. Cellular processes that buffer against the effects of gene duplication and deletion are therefore key to cell viability. MicroRNAs are short RNA molecules that modulate gene function through translational repression, and are frequently characterised as buffers for gene dosage. This project will use a combination of computational and genetic approaches to study the roles of microRNAs as buffers of gene and chromosome duplications. We will analyse available genomes of cell lines for common losses and duplications of protein-coding genes and microRNAs, and available transcriptomic data as a source of gene and microRNA expression data. We will ask the following questions: 1. Are common sets of protein-coding and microRNA genes duplicated or lost in diverse cell lines?2. Are genes that are duplicated or lost in cell lines more or less likely to be targeted by microRNAs?3. What is the effect of duplication of microRNA and/or target gene on their expression levels?We will manipulate the expression of both microRNAs and their target genes, simulating the effects of gene duplication, in cell lines derived from various animal systems, including cancer cell lines. A variety of assays will be used to assess the contribution of both microRNA and target genes to buffering gene duplication and aneuploidy. Understanding how microRNAs buffer the consequences of aneuploidy will provide key insights into cell viability, including in diseases such as cancer, and the consequences of gene duplication.