过度表达的microRNA-145 提高自活动通过下调FRS2表达
Ke Tian1, Bin Deng2, Xiaodong Han2
1Department of Orthopedics and Joint, Affiiated Hospital of Jining Medical University, Shandong, 272001, China.
Combinatorial chemistry & high throughput screening
|June 2, 2023
概括
微RNA-145 (miR-145) 通过调节自来保护骨关节炎 (OA) 中的冠状细胞. 在OA中较低的miR-145水平可能表明早期疾病并提供治疗点.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 骨关节炎 (OA) 是一种常见的退行性关节疾病,导致软骨分解和软骨细胞死亡.
- 已知MicroRNA-145 (miR-145) 能调节各种细胞类型的自,但其在OA冠状细胞中的作用仍未被探索.
研究的目的:
- 调查miR-145在骨关节炎发育期间调节软骨细胞自的作用.
- 为了确定miR-145表达水平是否与OA进展和冠状细胞活力相关.
主要方法:
- 在人类OA关节样本中分析miR-145表达.
- 双 luciferase 试验以确认 miR-145 和 FRS2.2 之间的向关系.
- 在操纵miR-145和FRS2水平后评估状细胞自和活力.
主要成果:
- 在OA患者中,miR-145表达和自标记 (LC3-II/LC3-I比率) 降低,而SQSTM1表达增加.
- 冠状细胞中miR-145的过度表达增强了自,在氧化应激下增加了细胞活力,并降低了SQSTM1水平.
- 确定FRS2是miR-145的直接标,通过PI3K/Akt/mTOR通路对自的抑制作用进行中介.
结论:
- 通过调节miR-145/FRS2/自轴,miR-145的功能是红细胞中的保护因子.
- 突液中miR-145的降低可以作为OA的早期诊断标志物.
- 调节miR-145为骨关节炎提供了一个潜在的治疗策略.
相关概念视频
MicroRNAs
3.0K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
3.0K
mTOR Signaling and Cancer Progression
3.8K
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...
3.8K
Autophagy
4.4K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
4.4K
Receptor Downregulation in MVBs
2.1K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.1K
Autophagic Cell Death
3.5K
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
3.5K
PI3K/mTOR/AKT Signaling Pathway
3.7K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.7K


