Shen Michelle, Demers Léa-Kristine, Bailey Swneke D, Labbé David P
Cancer Research Program, Research Institute of the McGill University Health Centre, Montréal, QC, Canada.
Division of Experimental Surgery, Department of Surgery, McGill University, Montréal, QC, Canada.
Front Oncol. 2022 Sep 23;12:963007. doi: 10.3389/fonc.2022.963007. eCollection 2022.
The term "cistrome" refers to the genome-wide location of regulatory elements associated with transcription factor binding-sites. The cistrome of key regulatory factors in prostate cancer etiology are substantially reprogrammed and altered during prostatic transformation and disease progression. For instance, the cistrome of the androgen receptor (AR), a ligand-inducible transcription factor central in normal prostate epithelium biology, is directly impacted and substantially reprogrammed during malignant transformation. Accumulating evidence demonstrates that additional transcription factors that are frequently mutated, or aberrantly expressed in prostate cancer, such as the pioneer transcription factors Forkhead Box A1 (FOXA1), the homeobox protein HOXB13, and the GATA binding protein 2 (GATA2), and the ETS-related gene (ERG), and the MYC proto-oncogene, contribute to the reprogramming of the AR cistrome. In addition, recent findings have highlighted key roles for the SWI/SNF complex and the chromatin-modifying helicase CHD1 in remodeling the epigenome and altering the AR cistrome during disease progression. In this review, we will cover the role of cistromic reprogramming in prostate cancer initiation and progression. Specifically, we will discuss the impact of key prostate cancer regulators, as well as the role of epigenetic and chromatin regulators in relation to the AR cistrome and the transformation of normal prostate epithelium. Given the importance of chromatin-transcription factor dynamics in normal cellular differentiation and cancer, an in-depth assessment of the factors involved in producing these altered cistromes is of great relevance and provides insight into new therapeutic strategies for prostate cancer.
“顺反组”一词指的是与转录因子结合位点相关的调控元件在全基因组范围内的定位。前列腺癌病因学中关键调控因子的顺反组在前列腺转化和疾病进展过程中会发生显著的重编程和改变。例如,雄激素受体(AR)是正常前列腺上皮生物学中的一种配体诱导型转录因子,其顺反组在恶性转化过程中会受到直接影响并发生显著重编程。越来越多的证据表明,在前列腺癌中频繁发生突变或异常表达的其他转录因子,如先驱转录因子叉头框A1(FOXA1)、同源框蛋白HOXB13、GATA结合蛋白2(GATA2)、ETS相关基因(ERG)以及MYC原癌基因,都有助于AR顺反组的重编程。此外,最近的研究结果突出了SWI/SNF复合物和染色质修饰解旋酶CHD1在疾病进展过程中重塑表观基因组和改变AR顺反组方面的关键作用。在这篇综述中,我们将探讨顺反组重编程在前列腺癌起始和进展中的作用。具体而言,我们将讨论关键前列腺癌调控因子的影响,以及表观遗传和染色质调控因子与AR顺反组及正常前列腺上皮转化的关系。鉴于染色质-转录因子动态变化在正常细胞分化和癌症中的重要性,深入评估导致这些顺反组改变的因素具有重要意义,并为前列腺癌的新治疗策略提供了见解。