通过CDC14A-KMT5A信号通路调节同心同心和异心心心变大之间的平衡
bioRxiv : the preprint server for biology
|February 27, 2026
概括
蛋白酸酶CDC14A通过控制心肌细胞生长来调节心脏重塑. 它与KMT5A和H4K20me1表观基因组修饰的相互作用决定了病态心脏几何学,为心力衰竭提供了治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 分子心脏病学分子心脏病学
- 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:
- 病理性压力诱导同心或偏心心脏重塑,导致心室功能障碍和心力衰竭.
- 驱动异常心脏几何形状的分子机制尚不清楚.
- 细胞分裂周期14A (CDC14A) 和KMT5A被确定为心脏重塑的关键调节者.
研究的目的:
- 研究CDC14A和KMT5A在调节心肌细胞形态和病态心脏重塑中的作用.
- 阐明KMT5A影响心脏结构和功能的表观遗传学机制.
主要方法:
- 使用成年大鼠心室肌细胞进行体外研究,以评估CDC14A和KMT5A的功能.
- RNA干扰 (RNAi) 和野生类型/突变蛋白的表达,用于功能增益和丧失研究.
- 在小鼠体内使用腺相关病毒 (AAV) 介导的shRNA调节心肌细胞中的CDC14A和KMT5A.
- 绘制H4K20me1修饰染色体位点的映射和与基因转录的相关性.
主要成果:
- CDC14A抑制了肌细胞宽度的增长;KMT5A被CDC14A下调,对肌细胞生长至关重要.
- 由KMT5A依赖的H4K20单甲基化调节的基因转录.
- 在小鼠中,KMT5A敲击诱导了异常重塑和心脏功能障碍.
- CDC14A敲击在扩展性心肌病的小鼠模型中改善了心脏结构和功能.
结论:
- 根据CDC14A-KMT5A的表观基因调节,作为决定心脏重塑的分子开关.
- CDC14A是扩张性心肌病和心力衰竭的潜在治疗点,其排气分数减少.
相关概念视频
Cardiomyopathy III: Hypertrophic Cardiomyopathy
568
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
568
Heart Failure II: Pathophysiology
1.1K
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
1.1K
Cells Coordinate Growth and Proliferation
5.2K
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
5.2K
mTOR Signaling and Cancer Progression
4.9K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.9K
Cardiomyopathy II: Dilated Cardiomyopathy
667
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
667
Pathophysiology of Heart Failure
4.2K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
4.2K


