甲基化阅读器MBD2-介导的GPX4转录抑制驱动PCOS中的卵巢颗粒细胞铁亡
Zhengquan Zhu1, Yihan Wang2, Xinye Yu2
1Department of Pain Management, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China; Department of State Key Laboratory of Analytical Chemistry for Life Science and Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, 210009, China.
Redox biology
|January 23, 2026
概括
多囊性卵巢综合征 (PCOS) 涉及由甲基-CpG结合域蛋白2 (MBD2) 调节的粒粉细胞铁. MBD2抑制了谷氨过氧化酶4 (GPX4),促进了PCOS. 针对MBD2提供了一个潜在的治疗方法.
科学领域:
- 生殖生物学 生殖生物学
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 多囊卵巢综合征 (PCOS) 的特点是排卵功能障碍和囊发育停止.
- 粒粉细胞 (GC) 铁与PCOS病原体有关,但其调节机制尚不清楚.
研究的目的:
- 研究甲基-CpG结合域蛋白2 (MBD2) 在调节GC铁和PCOS发展中的作用.
- 为了确定PCOS中GC铁化背后的表观遗传机制.
主要方法:
- 使用了脱水氨 (DHEA) 诱导的PCOS小鼠模型.
- 执行了GC特异性的Gpx4淘汰和MBD2 (KCC-07) 和DNMTs (5-阿扎西提丁) 的药理抑制.
- 进行了整合性ATAC-seq和RNA-seq分析,以检查表观遗传修饰和基因表达.
主要成果:
- PCOS GCs显示铁和抑制的谷氨过氧化酶4 (GPX4) 表达,与MBD2和Gpx4促进剂高甲基化有关.
- 抑制MBD2或DNMT阻塞恢复了GPX4,减少了铁亡,并缓解了PCOS病理.
- 由于MBD2抑制,MBD2,MAZ,HDAC3和NCoR在Gpx4促进体形成了一个抑制性复合体,被MBD2抑制破坏.
结论:
- 一个由MBD2驱动的表观遗传程序使GPX4沉默,诱导GC铁和促进PCOS.
- 准MBD2以恢复铁亡的表观遗传控制,为PCOS提供了一个有前途的治疗策略.
相关概念视频
01:52Eukaryotic Transcription Inhibitors
10.9K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
10.9K
02:16Transcription Factors
82.3K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.3K
01:16Repressed Memory
508
Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...
508
02:42Eukaryotic Transcription Activators
12.6K
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
12.6K
01:10Transcription
155.8K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
155.8K
01:21Repressible Operon: trp Operon
1.5K
The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
1.5K