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A Female Specific Role of RGSz1 in Modulation of Chronic Pain

RGSz1 在调节慢性疼痛中的女性特异性作用

基本信息

批准号：
10441146
负责人：
Venetia Zachariou
金额：
$ 36.53万
依托单位：
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
依托单位国家：
美国
项目类别：
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-01 至 2023-01-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10441146
关键词：
Acute Pain Affect Affinity Attenuated Behavior Biochemical Biochemistry Biological Assay Brain Cell Surface Receptors Data Electrophysiology (science)Elements Enterobacteria phage P1 Cre recombinase Estrogen Nuclear Receptor Estrogen Receptors Female Fractionation G-Protein-Coupled Receptors GTP Phosphohydrolase Activators GTP-Binding Protein Regulators GTP-Binding Protein alpha Subunits, Gs Gene Expression Gene Silencing Genes Genetic Genetic Transcription Golgi Apparatus Gonadal Hormones Hypersensitivity Immunofluorescence Immunologic In Situ Inflammation Label LoxP-flanked allele Maintenance Mediating Messenger RNA Methodology Modeling Molecular Monitor Mus Neurons Nociception Norepinephrine Norepinephrine Receptors Pain Pathologic Pathway interactions Pattern Perception Peripheral Peripheral nerve injury Pharmacology Physiological Play Property Proteins RGS1 gene Regulation Ribosomes Role Sensory Serotonin Signal Transduction Spinal Cord Plasticity Symptoms Testing Thermal Hyperalgesias Transcript Translating Viral Vector Western Blotting Woman Work adeno-associated viral vector base central pain central sensitization chromatin immunoprecipitation chronic pain chronic pain management chronic painful condition efficacious treatment inflammatory pain knock-down knockout gene male mechanical allodynia men midbrain central gray substance mouse model nerve injury next generation novel overexpression pain model pain processing painful neuropathy patch clamp protein expression receptor receptor binding reduce symptoms response serotonin receptor sex transcriptome sequencing transmission process vector

项目摘要

SUMMARY While the mechanisms modulating the transmission and perception of chronic pain differ between men and women, the exact neuroanatomical and molecular differences existing between the sexes remain only partly understood. This proposal focuses on the study of intracellular mechanisms that modulate symptoms of long-term pain states in female mice. We have identified signal transduction mechanisms in the mouse ventrolateral periaqueductal gray (vlPAG) that selectively modulate sensory symptoms of inflammatory and neuropathic pain in female mice. The signal transduction modulator Regulator of G Protein Signaling-1 (RGSz1) controls the function of G protein coupled receptors (GPCRs) by binding to activated Gi subunits, including the Golgi enriched Gz. RGSz1 negatively modulates the amplitude and direction of signal transduction of several GPCRs involved in the modulation of pain processing, including the serotonin 5HT1A receptor. We recently found that RGSz1 mRNA and protein levels are dynamically regulated in the vlPAG of female (but not male) mice by long-term peripheral inflammation. Constitutive deletion of the RGSz1 gene or vlPAG-specific knockdown of RGSz1, exacerbate sensory hypersensitivity behaviors such as thermal hyperalgesia and mechanical allodynia in female mice, but they have no effect in male mice. We will investigate the mechanisms regulating the expression of RGSz1 in the male and female vlPAG at various points after the induction of peripheral nerve injury or inflammation. We will apply several genetic mouse models for regional inactivation or overexpression of RGSz1 in vlPAG neuronal subsets, along with brain biochemistry, electrophysiology and voltammetry to understand the sex-specific role of RGSz1 in the function of the descending inhibitory pathway in models of chronic pain. Since RGSz1 plays a prominent role in the function of the Golgi apparatus, will apply chronic pain models to understand the impact of RGSz1 on the expression levels of trans- Golgi components in the presence and in the absence of pain. Finally, we will use RNA Sequencing to understand the impact of RGSz1 on gene expression adaptations underlying chronic pain states.

总结