一个ERK5-NRF2轴调解衰老相关的干和动脉样硬化
Jun-Ichi Abe1, Masaki Imanishi1, Shengyu Li2
1Departments of Cardiology (J.-i.A., M.I., K.A.K., V.S.K.S., L.-L.L., A.P.B., Y.J.G., A.D., N.L.P., K.F., S. Kotla), The University of Texas MD Anderson Cancer Center, Houston, TX.
Circulation research
|June 2, 2023
概括
ERK5酸化将髓状细胞重新编程为衰老的表型,导致动脉样硬化. 抑制ERK5 S496酸化可降低这一过程,为炎症性疾病提供新的治疗点.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 心血管研究研究心血管研究
背景情况:
- 细胞外信号调节激酶5 (ERK5) 是一种参与癌症和炎症的激酶.
- 它在增殖和炎症中的作用正在受到审查,特别是其催化活性.
- 这项研究调查了ERK5在重编程髓状细胞向衰老的表型中的作用,这有助于动脉样硬化.
研究的目的:
- 研究ERK5将骨髓状细胞重新编程为促炎衰老表型的机制.
- 了解ERK5酸化,特别是496 (S496) 血清酸化在动脉样硬化发展中的作用.
- 探索ERK5,基碳化合物受体 (AHR) 和NFE2相关因子2 (NRF2) 在巨细胞衰老和炎症中的相互作用.
主要方法:
- 使用CRISPR/Cas9生成一个敲入鼠标模型 (ERK5 S496A),以模仿ERK5脱化.
- 诱导高胆固醇血症通过成像质细胞测量来研究动脉样硬化发展和斑块特征.
- 用于RNA测序,衰老测定,反应性氧物种测量,炎症测定和代谢流量分析的骨髓衍生的分离巨.
主要成果:
- 动脉样硬化在ERK5 S496A敲进小鼠中被显著抑制.
- 发现ERK5 S496酸化通过上调巨细胞中的AHR来调节与衰老相关的分泌和干性表型.
- ERK5 S496酸化诱导NRF2在K518的SUMOylation,抑制NRF2的活性,并促进氧化LDL诱导的衰老,独立于ERK5的催化活性.
结论:
- 在巨细胞中,一种新的ERK5-NRF2-AHR轴驱动了一种与衰老相关的分泌/干细胞表型,促进了动脉生成.
- 这种与衰老相关的干性表型解释了髓状细胞如何在增殖斑块中逃避衰老诱导的细胞循环停止.
- ERK5 S496酸化是这一过程中的关键调解物,这表明它是动脉样硬化和相关炎症状况的潜在治疗标.
相关概念视频
Aging
92
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
92
Atherosclerosis I: Introduction
14
Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
14
Replicative Cell Senescence
3.7K
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
3.7K
Nitric Oxide Signaling Pathway
5.1K
Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
5.1K
NF-κB-dependent Signaling Pathway
7.5K
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
NF-κB-dependent Signaling Mechanism
The...
7.5K
Stem Cell Niche
5.2K
The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
5.2K


