在 nociceptors 中的4E-BP1-依赖翻译通过TRIM32/I型干扰素信号传递控制机械过敏性
Calvin Wong1, Diana Tavares-Ferreira2, Carolina Thörn Perez1,3
1Department of Anaesthesia, McGill University, Montreal, Canada.
Science advances
|November 3, 2023
概括
拉巴胺素复合体1 (mTORC1) 激活的机械标会导致慢性疼痛过敏. 这项研究表明,mTORC1通过4E-BP1在痛感受体中对TRIM32进行上调,促进疼痛信号传递并提供治疗点.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 疼痛研究 疼痛研究
背景情况:
- 拉巴胺素复合体1 (mTORC1) 激活的机械标与慢性疼痛的发展有关.
- 连接mTORC1与疼痛过敏的精确分子机制尚未完全理解.
- 细胞启动因子4E结合蛋白1 (4E-BP1) 是mTORC1的一个关键下游效应因子,调节翻译启动.
研究的目的:
- 阐明mTORC1激活导致疼痛过敏的特定机制.
- 调查4E-BP1及其下游点在恶性感知中的作用.
- 为了确定炎症性疼痛的潜在治疗点.
主要方法:
- 在小鼠中,针对nociceptor的4E-BP1的特定删除,以模仿mTORC1的激活.
- 在 nociceptors 中翻译核糖体亲和力净化 (TRAP) 以识别上调蛋白质.
- 在转基因小鼠和药物干预后对机械过敏的评估.
- 评估TRIM32在炎症性疼痛模型中的作用.
主要成果:
- 在 nociceptors 中删除 4E-BP1 诱导了机械过敏.
- 在4E-BP1缺陷的恶性受体中发现了三方基因含有蛋白32 (TRIM32) 的转化上调.
- 降低TRIM32的调节或阻断I型干扰素信号反向过敏.
- 特定于nociceptor的TRIM32除缓解了炎症性疼痛过敏.
结论:
- 在 nociceptors中mTORC1的激活通过4E-BP1依赖的TRIM32.3的翻译上调促进疼痛过敏.
- 传感器中的TRIM32/干扰素信号通路对于机械过敏至关重要.
- TRIM32代表了一种有希望的治疗点,用于控制炎症性疼痛.
相关概念视频
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
Nociception
27.9K
Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain.
27.9K
Leaky Scanning
5.1K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.1K
Transcription Attenuation in Prokaryotes
15.3K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
15.3K
Regulation of the Unfolded Protein Response
2.4K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.4K
Mechanically-gated Ion Channels
6.4K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.4K


