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m6A RNA甲基化是一种重要的表观遗传修饰,这种转录后的RNA修饰是受甲基化酶、去甲基化酶和识别m6A修饰的蛋白质调控的动态和可逆的过程。m6A参与了真核生物RNA代谢的各个方面,包括mRNA前剪接、3' 端加工、核输出、翻译调节、mRNA衰变和非编码RNA(ncRNA)加工。已有较多的证据表明m6A因子的异常表达或功能异常与肝癌的发生和进展有关,但仍有部分m6A甲基化修饰因子在肝癌中的作用机制未明。本文就m6A甲基化修饰因子在肝癌中的作用进行了系统回顾,归纳了m6A因子在肝癌中的作用机制及其对预后的影响,总结了目前研究尚不充分的领域。该研究为开展下一阶段的m6A甲基化修饰在肝癌中的机制研究提供借鉴。 相似文献
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丁瑶瑶;冲喜会;魏林珍;朱姣姣;张倩倩;陈凡;秦天生 《实用癌症杂志》2024,(1):171-174
<正>2018年全球癌症统计,宫颈癌被公认为第二大最常见的恶性肿瘤,其死亡率在女性中位居第二[1]。宫颈癌在中低收入国家的发病率和死亡率较高[2],其中印度(病例:97000,死亡:60000)和中国(病例:106000,死亡:48000)加起来占全球宫颈癌的三分之一以上[3]。尽管人乳头瘤病毒的疫苗和筛查广泛应用于临床,但临床中宫颈癌的诊断和治疗仍备受关注。近几十年来,RNA的表观遗传调控已成为一个热门话题, 相似文献
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RNA m6A(N6-methyladenosine,m6A)修饰是由m6A甲基转移酶和去甲基化酶所调节的,整个过程是动态可逆的。m6A修饰可以调控基因的表达,在许多生命进程中发挥着重要的作用。近年来,有文章报道m6A修饰通过调节RNA稳定性,微小RNA处理,mRNA剪切和翻译,在人类肿瘤的发生发展中起着重要作用,包括肺癌、肝癌、乳腺癌、子宫内膜癌和急性髓细胞白血病等。本文总结了RNA m6A修饰与肿瘤的关系,以及RNA m6A修饰在不同肿瘤中的生物学功能,对于研究RNA m6A修饰的靶基因及其所调控的肿瘤发生和发展具有重要意义。 相似文献
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近年来,表观遗传修饰在恶性肿瘤发生发展中的调控作用受到广泛关注。早期的表观遗传修饰研究主要集中于DNA 和蛋白质水平,随着RNA深度测序技术和生物信息学方法的发展, 以N6-甲基腺嘌呤(N6-methyladenosine, m6A)为主的RNA表 观遗传修饰逐渐成为生物科学领域的研究热点。m6A是存在于所有高等真核生物中最普遍的mRNA表观修饰,具有动态可逆的 特点,涉及许多复杂细胞过程的精细调控, 如RNA的加工、运输、定位、翻译及降解等。最新研究表明, m6A可通过“写入”、“擦 除”和“阅读”相关因子的异常表达,可逆地动态调节RNA运输、定位、翻译及降解等方面,通过多种机制在肿瘤的发生发展过程 中发挥促进或抑制作用。本文就近年来m6A的生物学特性、RNA修饰的调控机制及其在肿瘤发生发展中的作用研究进展作一综述。 相似文献
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<正>骨质疏松症(osteoporosis,OP)是一种全身性骨代谢负性失衡疾病,其特征是骨量减少和骨组织微结构破坏,临床表现为骨骼疼痛和骨折[1]。骨量的动态平衡主要是由破骨细胞(osteoclast,OC)、成骨细胞(osteoblast,OB)、骨细胞和骨髓间充质干细胞(BMSCs)调控[2]。其中OC是机体内惟一具有骨吸收功能的多核巨细胞,OB和OC则在骨重建中扮演了重要的角色[3]。因此, 相似文献
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RNA的N6-甲基腺嘌呤(m6A)甲基化是RNA修饰的最主要形式,参与m6A甲基化与去甲基化过程的酶分为3类:甲基转移酶,去甲基酶和m6A结合蛋白。这3类调控m6A的蛋白在RNA的加工代谢以及正常生理功能中发挥重要的调节作用,并且通过调节RNA的转录、剪接、加工、翻译和衰变等过程参与多种恶性肿瘤的发生和转移。近年来随着m6A检测技术的发展,m6A甲基化在恶性肿瘤病理进程中的作用研究逐渐成为热点。本文就有关m6A甲基化修饰影响肿瘤病程的表观遗传学机制进行综述,旨在为以m6A甲基化为靶点的肿瘤治疗策略提供新思路。 相似文献
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卵巢癌是死亡率最高的妇科恶性肿瘤,其微环境是由多种细胞和非细胞成分共同组成的。肿瘤细胞和微环境的相互作用影响肿瘤的进展。因此,寻找新的肿瘤标志物及治疗靶点有着重要意义。长链非编码RNA(long non-coding RNA,lncRNA)是长度超过200个核苷酸的非编码RNA,在多种肿瘤的发生、发展和耐药中发挥着重要的作用。在本篇综述中,研究证明lncRNA在卵巢癌肿瘤微环境中细胞成分和非细胞成分交流的过程中发挥重要作用。此外,本文总结了以lncRNA作为靶向卵巢癌肿瘤微环境或细胞成分潜在靶点的治疗方式。 相似文献
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作为转录产物的长链非编码RNA(long non-coding RNA,lncRNA),在小鼠全cDNA文库的大规模基因测序中首次被描述。随着研究的深入,其重要功能逐渐为人们所认知。lncRNA不仅是一个简单的信使角色,更具有精细结构和重要的转录及信息储备功能。本文着重讨论目前对长链非编码RNA的认识以及长链非编码RNA在肿瘤发生、发展中的作用。 相似文献
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N6-methyladenosine (m6A) methylation is a type of methylation modification on RNA molecules, which was first discovered in 1974, and has become a hot topic in life science in recent years. m6A modification is an epigenetic regulation similar to DNA and histone modification and is dynamically reversible in mammalian cells. This chemical marker of RNA is produced by m6A ‘writers’ (methylase) and can be degraded by m6A ‘erasers’ (demethylase). Methylated reading protein is the ‘reader’, that can recognize the mRNA containing m6A and regulate the expression of downstream genes accordingly. m6A methylation is involved in all stages of the RNA life cycle, including RNA processing, nuclear export, translation and regulation of RNA degradation, indicating that m6A plays a crucial role in RNA metabolism. Recent studies have shown that m6A modification is a complicated regulatory network in different cell lines, tissues and spatio-temporal models, and m6A methylation is associated with the occurrence and development of tumors. The present review describes the regulatory mechanism and physiological functions of m6A methylation, and its research progress in several types of human tumor, to provide novel approaches for early diagnosis and targeted treatment of cancer. 相似文献
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长链非编码RNA(Long non-coding RNA,lncRNA)是序列长度大于200个核苷酸且不能编码蛋白质的RNA分子.近年来,越来越多的研究指出lncRNA与肿瘤的诊断、预防、治疗及预后有密切联系,在恶性肿瘤的临床应用中有重大价值.小核仁RNA宿主基因3(Small nucleolar RNA host g... 相似文献
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N6-甲基腺苷(N^(6)-methyladeno sine,m^(6)A)作为一种可逆的转录后修饰,是真核生物mRNA中最为普遍的一种RNA修饰形式。肿瘤干细胞(cancer stem cell,CSC)是肿瘤中一群具有自我更新能力和分化潜能的细胞,在肿瘤复发、转移中起关键作用。近年来大量研究表明m^(6)A具有调节肿瘤干细胞干性的能力。本文对m^(6)A相关酶的特征及其对肿瘤干细胞的作用机制进行综述,为选择性消除肿瘤干细胞提供新的靶点及研究方向。 相似文献
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Tong Wu Tian-Yang Qian Ren-Jie Lin Dan-Dan Jin Xue-Bin Xu Meng-Xiang Huang Jie Ji Feng Jiang Ling-Ling Pan Lan Luo Yi-Fei Ji Qiao-Lan Chen Ming-Bing Xiao 《Journal of gastrointestinal oncology.》2022,13(5):2553
BackgroundBoth N6-methyladenosine (m6A) ribonucleic acid (RNA) methylation and ferroptosis regulators are demonstrated to have significant effects on the malignant clinicopathological characteristics of pancreatic adenocarcinoma (PAAD) patients. However, the currently available clinical indexes are not sufficient to predict precise prognostic outcomes pf PAAD patients accurately. This study aims to examine the clinicopathologic features of m6A RNA methylation and ferroptosis regulators in predicting the outcomes of different types of cancer.MethodsAs the foundation for this research, the differentially expressed genes (DEGs) between PAAD tissues and adjacent normal tissues were first identified. Next, dimensional reduction analysis (DCA) based on m6A RNA methylation regulators and ferroptosis regulators were performed and DEGs between good/poor prognosis PAAD patient clusters were identified. DEGs were then screened by Cox analysis, and finally a risk signature was established by least absolute shrinkage and selection operator (LASSO) analyses. The prediction model based on risk score was further evaluated by a validation set from Gene Expression Omnibus (GEO) database.ResultsIn total, 4 m6A RNA methylation regulator genes and 29 ferroptosis regulator genes were found to have close causal relationships with the prognosis of PAAD, and a risk score with 3 m6A methylation regulators (i.e., IGF2BP2, IGF2BP3, and METTL16) and 4 ferroptosis regulators (i.e., ENPP2, ATP6V1G2, ITGB4, and PROM2) was constructed and showed to be highly involved in PAAD progression and could serve as effective markers for prognosis with AUC value equaled 0.753 in training set and 0.803 in validation set.ConclusionsThe combined prediction model, composed of seven regulators of m6A methylation and ferroptosis, in this study more effectively reflects the progression and prognosis of PAAD than previous single genome or epigenetic analysis. Our study provides a broader perspective for the subsequent establishment of prognostic models and the patients may benefit from more precision management. 相似文献
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m6A-RNA甲基化是一种类似于DNA甲基化或组蛋白修饰的表观遗传修饰方式。是由甲基化转移酶、去甲基转移酶和相关阅读蛋白共同调节的一种动态可逆的生物学过程,可以对 mRNA产生不同的生物学作用,包括mRNA剪切、出核、降解、影响mRNA稳定性和翻译效率等。越来越多的研究表明m6A-RNA甲基化在正常造血和急性髓系白血病中发挥重要的调控作用。本文就m6A-RNA甲基化在正常造血和AML中的研究进展作一综述,旨在从表观转录组学层面深入了解AML的发病机制,为探索AML靶向治疗药物提供一种新的研究策略。 相似文献