降低炎症体的关键组成部分:NLRP3 PROTAC 的发展
Tim Keuler1, Dominic Ferber2, Jonas Engelhardt3
1Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany. guetschow@uni-bonn.de.
概括
研究人员开发了化向化马体 (PROTACs) 来降解NLRP3,这是先天免疫的关键蛋白质. PROTAC V2有效降低了NLRP3水平,为研究NLRP3炎症酶提供了一个新的工具.
科学领域:
- 免疫学和分子生物学
- 药物发现和化学生物学化学生物学
背景情况:
- NLRP3炎症酶是天生的免疫系统的关键组成部分.
- 准NLRP3是一种治疗炎症疾病的治疗策略.
- 化向化体 (PROTACs) 为蛋白质降解提供了一种新的方法.
研究的目的:
- 设计和合成针对NLRP3.3的PROTAC.
- 为了评估这些PROTACs在降解NLRP3蛋白中的有效性.
- 探索PROTACs作为研究NLRP3炎症细胞生物学工具的潜力.
主要方法:
- 使用了NLRP3抑制剂MCC950.0.的烯类似物.
- 用于PROTAC组装的铜 (I) 催化基亚酸环添加 (CuAAC) 化学.
- 进行了双向热稳定性测试,IL-1β释放测试,并对NLRP3蛋白质丰度进行了西部斑点分析.
主要成果:
- 成功合成了具有不同链接剂和E3酶结合剂的PROTACs.
- 在细胞检测中,PROTAC V2显示了NLRP3的显著VHL-依赖性降解.
- 证实了PROTAC V2在降低IL-1β释放和NLRP3蛋白水平方面的有效性.
结论:
- PROTAC V2 是一种有效的工具,可以诱导NLRP3.3的有针对性的降解.
- 这种PROTAC介导的降解方法为研究NLRP3炎症酶的功能提供了一种有价值的方法.
- 这些发现支持开发用于治疗NLRP3相关炎症条件的PROTACs.
相关概念视频
The Intrinsic Apoptotic Pathway
6.2K
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
6.2K
NF-κB-dependent Signaling Pathway
7.2K
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...
7.2K
The Unfolded Protein Response
4.4K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
4.4K
The Extrinsic Apoptotic Pathway
6.1K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
6.1K
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
Caspases
12.2K
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
12.2K


