Generation of Comprehensive GPCR-Transducer-Deficient Cell Lines to Dissect the Complexity of GPCR Signaling.

IF 19.3 1区 医学 Q1 PHARMACOLOGY & PHARMACY Pharmacological Reviews Pub Date : 2024-06-14 DOI:10.1124/pharmrev.124.001186
Ayaki Saito, Ryoji Kise, Asuka Inoue
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Abstract

G-protein-coupled receptors (GPCRs) compose the largest family of transmembrane receptors and are targets of approximately one-third of Food and Drug Administration-approved drugs owing to their involvement in almost all physiologic processes. GPCR signaling occurs through the activation of heterotrimeric G-protein complexes and β-arrestins, both of which serve as transducers, resulting in distinct cellular responses. Despite seeming simple at first glance, accumulating evidence indicates that activation of either transducer is not a straightforward process as a stimulation of a single molecule has the potential to activate multiple signaling branches. The complexity of GPCR signaling arises from the aspects of G-protein-coupling selectivity, biased signaling, interpathway crosstalk, and variable molecular modifications generating these diverse signaling patterns. Numerous questions relative to these aspects of signaling remained unanswered until the recent development of CRISPR genome-editing technology. Such genome editing technology presents opportunities to chronically eliminate the expression of G-protein subunits, β-arrestins, G-protein-coupled receptor kinases (GRKs), and many other signaling nodes in the GPCR pathways at one's convenience. Here, we review the practicality of using CRISPR-derived knockout (KO) cells in the experimental contexts of unraveling the molecular details of GPCR signaling mechanisms. To mention a few, KO cells have revealed the contribution of β-arrestins in ERK activation, Gα protein selectivity, GRK-based regulation of GPCRs, and many more, hence validating its broad applicability in GPCR studies. SIGNIFICANCE STATEMENT: This review emphasizes the practical application of G-protein-coupled receptor (GPCR) transducer knockout (KO) cells in dissecting the intricate regulatory mechanisms of the GPCR signaling network. Currently available cell lines, along with accumulating KO cell lines in diverse cell types, offer valuable resources for systematically elucidating GPCR signaling regulation. Given the association of GPCR signaling with numerous diseases, uncovering the system-based signaling map is crucial for advancing the development of novel drugs targeting specific diseases.

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生成全面的 GPCR 转换器缺陷细胞系,以剖析 GPCR 信号的复杂性。
G 蛋白偶联受体(GPCR)是跨膜受体中最大的家族,由于其参与几乎所有生理过程,因此成为美国食品药物管理局批准的约三分之一药物的靶点。GPCR 信号传导是通过激活异三聚 G 蛋白复合物和 β-阻遏蛋白来实现的,这两种蛋白都是传导因子,会导致不同的细胞反应。尽管乍看起来很简单,但越来越多的证据表明,激活其中任何一种转导因子都不是一个简单的过程,因为刺激单个分子有可能激活多个信号分支。GPCR 信号转导的复杂性来自 G 蛋白偶联选择性、偏向信号转导、通路间串扰以及产生这些不同信号转导模式的可变分子修饰等方面。在最近开发出 CRISPR-Cas9 基因组编辑技术之前,与信号转导的这些方面有关的许多问题仍然没有答案。这种基因组编辑技术为长期消除 G 蛋白亚基、β-阻遏蛋白、GRK 和 GPCR 通路中的许多其他信号节点的表达提供了机会。在此,我们回顾了在揭示 GPCR 信号转导机制分子细节的实验中使用 CRISPR-Cas9 衍生的基因敲除(KO)细胞的实用性。KO 细胞揭示了 β-restins 在 ERK 激活、Gα 蛋白选择性、基于 GRK 的 GPCR 调控等方面的贡献,从而验证了它在 GPCR 研究中的广泛适用性。意义声明 本综述强调了 GPCR 效应 KO 细胞在剖析 GPCR 信号网络复杂调控机制中的实际应用。目前可用的细胞系以及在不同细胞类型中积累的 KO 细胞系为系统阐明 GPCR 信号调控提供了宝贵的资源。鉴于 GPCR 信号与多种疾病的关联,揭示基于系统的信号图谱对于推进针对特定疾病的新型药物的开发至关重要。
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来源期刊
Pharmacological Reviews
Pharmacological Reviews 医学-药学
CiteScore
34.70
自引率
0.50%
发文量
40
期刊介绍: Pharmacological Reviews is a highly popular and well-received journal that has a long and rich history of success. It was first published in 1949 and is currently published bimonthly online by the American Society for Pharmacology and Experimental Therapeutics. The journal is indexed or abstracted by various databases, including Biological Abstracts, BIOSIS Previews Database, Biosciences Information Service, Current Contents/Life Sciences, EMBASE/Excerpta Medica, Index Medicus, Index to Scientific Reviews, Medical Documentation Service, Reference Update, Research Alerts, Science Citation Index, and SciSearch. Pharmacological Reviews offers comprehensive reviews of new pharmacological fields and is able to stay up-to-date with published content. Overall, it is highly regarded by scholars.
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