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Spicer MM, Weber MA, Luo Z, Yang J, Narayanan NS, Fisher RA. Regulator of G protein signaling 6 (RGS6) in dopamine neurons promotes EtOH seeking, behavioral reward, and susceptibility to relapse. Psychopharmacology (Berl) 2024:10.1007/s00213-024-06631-8. [PMID: 38856764 DOI: 10.1007/s00213-024-06631-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 05/31/2024] [Indexed: 06/11/2024]
Abstract
Mesolimbic dopamine (DA) transmission is believed to play a critical role in mediating reward responses to drugs of abuse, including alcohol (EtOH). The neurobiological mechanisms underlying EtOH-seeking behavior and dependence are not fully understood, and abstinence remains the only effective way to prevent alcohol use disorders (AUDs). Here, we developed novel RGS6fl/fl; DAT-iCreER mice to determine the role of RGS6 in DA neurons on EtOH consumption, reward, and relapse behaviors. We found that RGS6 is expressed in DA neurons in both human and mouse ventral tegmental area (VTA), and that RGS6 loss in mice upregulates DA transporter (DAT) expression in VTA DA neuron synaptic terminals. Remarkably, loss of RGS6 in DA neurons significantly reduced EtOH consumption, preference, and reward in a manner indistinguishable from that seen in RGS6-/- mice. Strikingly, RGS6 loss from DA neurons before or after EtOH behavioral reward is established significantly reduced (~ 50%) re-instatement of reward following extinguishment, demonstrating distinct roles of RGS6 in promoting reward and relapse susceptibility to EtOH. These studies identify DA neurons as the locus of RGS6 action in promoting EtOH consumption, preference, reward, and relapse. RGS6 is unique among R7 RGS proteins in promoting rather than suppressing behavioral responses to drugs of abuse and to modulate EtOH behavioral reward. This is a result of RGS6's pre-synaptic actions that we hypothesize promote VTA DA transmission by suppressing GPCR-Gαi/o-DAT signaling in VTA DA neurons. These studies identify RGS6 as a potential therapeutic target for behavioral reward and relapse to EtOH.
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Affiliation(s)
- Mackenzie M Spicer
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, 51 Newton Rd. BSB 2-512, Iowa City, IA, 52242, USA
- Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, 169 Newton Rd., Iowa City, IA, 52242, USA
- Department of Neurology, University of Iowa Carver College of Medicine, 200 Hawkins Dr., Iowa City, IA, 52242, USA
| | - Matthew A Weber
- Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, 169 Newton Rd., Iowa City, IA, 52242, USA
- Department of Neurology, University of Iowa Carver College of Medicine, 200 Hawkins Dr., Iowa City, IA, 52242, USA
| | - Zili Luo
- Department of Pediatrics, University of Iowa Carver College of Medicine, 200 Hawkins Dr., Iowa City, IA, 52242, USA
| | - Jianqi Yang
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, 51 Newton Rd. BSB 2-512, Iowa City, IA, 52242, USA
- Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, 169 Newton Rd., Iowa City, IA, 52242, USA
| | - Nandakumar S Narayanan
- Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, 169 Newton Rd., Iowa City, IA, 52242, USA
- Department of Neurology, University of Iowa Carver College of Medicine, 200 Hawkins Dr., Iowa City, IA, 52242, USA
| | - Rory A Fisher
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, 51 Newton Rd. BSB 2-512, Iowa City, IA, 52242, USA.
- Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, 169 Newton Rd., Iowa City, IA, 52242, USA.
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Mulloy SM, Aback EM, Gao R, Engel S, Pawaskar K, Win C, Moua A, Hillukka L, Lee AM. Subregion and sex differences in ethanol activation of cholinergic and glutamatergic cells in the mesopontine tegmentum. Sci Rep 2024; 14:46. [PMID: 38168499 PMCID: PMC10762073 DOI: 10.1038/s41598-023-50526-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024] Open
Abstract
Ethanol engages cholinergic signaling and elicits endogenous acetylcholine release. Acetylcholine input to the midbrain originates from the mesopontine tegmentum (MPT), which is composed of the laterodorsal tegmentum (LDT) and the pedunculopontine tegmental nucleus (PPN). We investigated the effect of acute and chronic ethanol administration on cholinergic and glutamatergic neuron activation in the PPN and LDT in male and female mice. We show that ethanol activates neurons of the PPN and not the LDT in male mice. Chronic 15 daily injections of 2 g/kg ethanol induced Fos expression in cholinergic and glutamatergic PPN neurons in male mice, whereas ethanol did not increase cholinergic and glutamatergic neuronal activation in the LDT. A single acute 4 g/kg injection, but not a single 2 g/kg injection, induced cholinergic neuron activation in the male PPN but not the LDT. In contrast, acute or chronic ethanol at either dose or duration had no effect on the activation of cholinergic or glutamatergic neurons in the MPT of female mice. Female mice had higher baseline level of activation in cholinergic neurons compared with males. We also found a population of co-labeled cholinergic and glutamatergic neurons in the PPN and LDT which were highly active in the saline- and ethanol-treated groups in both sexes. These findings illustrate the complex differential effects of ethanol across dose, time point, MPT subregion and sex.
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Affiliation(s)
- S M Mulloy
- Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN, USA
| | - E M Aback
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - R Gao
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - S Engel
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - K Pawaskar
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - C Win
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - A Moua
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - L Hillukka
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - A M Lee
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA.
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Song J, Li M, Chen C, Zhou J, Wang L, Yan Y, She J, Tong L, Song Y. Regulator of G protein signaling protein 6 alleviates acute lung injury by inhibiting inflammation and promoting cell self-renewal in mice. Cell Mol Biol Lett 2023; 28:102. [PMID: 38066447 PMCID: PMC10709870 DOI: 10.1186/s11658-023-00488-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 09/08/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Acute respiratory distress syndrome (ARDS) is a disease with high mortality and morbidity. Regulator of G protein signaling protein 6 (RGS6), identified as a tumor suppressor gene, has received increasing attention owing to its close relationship with oxidative stress and inflammation. However, the association between ARDS and RGS6 has not been reported. METHODS Congruously regulated G protein-coupled receptor (GPCR)-related genes and differentially expressed genes (DEGs) in an acute lung injury (ALI) model were identified, and functional enrichment analysis was conducted. In an in vivo study, the effects of RGS6 knockout were studied in a mouse model of ALI induced by lipopolysaccharide (LPS). HE staining, ELISA, and immunohistochemistry were used to evaluate pathological changes and the degree of inflammation. In vitro, qRT‒PCR, immunofluorescence staining, and western blotting were used to determine the dynamic changes in RGS6 expression in cells. The RGS6 overexpression plasmid was constructed for transfection. qRT‒PCR was used to assess proinflammatory factors transcription. Western blotting and flow cytometry were used to evaluate apoptosis and reactive oxygen species (ROS) production. Organoid culture was used to assess the stemness and self-renewal capacity of alveolar epithelial type II cells (AEC2s). RESULTS A total of 110 congruously regulated genes (61 congruously upregulated and 49 congruously downregulated genes) were identified among GPCR-related genes and DEGs in the ALI model. RGS6 was downregulated in vivo and in vitro in the ALI model. RGS6 was expressed in the cytoplasm and accumulated in the nucleus after LPS stimulation. Compared with the control group, we found higher mortality, more pronounced body weight changes, more serious pulmonary edema and pathological damage, and more neutrophil infiltration in the RGS6 knockout group upon LPS stimulation in vivo. Moreover, AEC2s loss was significantly increased upon RGS6 knockout. Organoid culture assays showed slower alveolar organoid formation, fewer alveolar organoids, and impaired development of new structures after passaging upon RGS6 knockout. In addition, RGS6 overexpression decreased ROS production as well as proinflammatory factor transcription in macrophages and decreased apoptosis in epithelial cells. CONCLUSIONS RGS6 plays a protective role in ALI not only in early inflammatory responses but also in endogenous lung stem cell regeneration.
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Affiliation(s)
- Juan Song
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, 200032, China
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of Pulmonary Medicine, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian, 361000, China
- Shanghai Respiratory Research Institute, Shanghai, 200032, China
| | - Miao Li
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Respiratory Research Institute, Shanghai, 200032, China
| | - Cuicui Chen
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, 200032, China
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Respiratory Research Institute, Shanghai, 200032, China
| | - Jian Zhou
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, 200032, China
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Respiratory Research Institute, Shanghai, 200032, China
| | - Linlin Wang
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Respiratory Research Institute, Shanghai, 200032, China
| | - Yu Yan
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Respiratory Research Institute, Shanghai, 200032, China
| | - Jun She
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Shanghai Respiratory Research Institute, Shanghai, 200032, China.
| | - Lin Tong
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Department of Pulmonary Medicine, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian, 361000, China.
- Shanghai Respiratory Research Institute, Shanghai, 200032, China.
| | - Yuanlin Song
- Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, 200032, China.
- Shanghai Key Laboratory of Lung Inflammation and Injury, Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Department of Pulmonary Medicine, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian, 361000, China.
- Shanghai Respiratory Research Institute, Shanghai, 200032, China.
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Mulloy SM, Aback EM, Gao R, Engel S, Pawaskar K, Win C, Moua A, Hillukka L, Lee AM. Subregion and sex differences in ethanol activation of cholinergic and glutamatergic cells in the mesopontine tegmentum. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.08.566053. [PMID: 38014248 PMCID: PMC10680559 DOI: 10.1101/2023.11.08.566053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Ethanol engages cholinergic signaling and elicits endogenous acetylcholine release. Acetylcholine input to the midbrain originates from the mesopontine tegmentum (MPT), which is composed of the laterodorsal tegmentum (LDT) and the pedunculopontine tegmental nucleus (PPN). We investigated the effect of acute and chronic ethanol administration on cholinergic and glutamatergic neuron activation in the PPN and LDT in male and female mice. We show that ethanol selectively activates neurons of the PPN and not the LDT in male mice. Acute 4.0 g/kg and chronic 15 daily injections of 2.0 g/kg i.p. ethanol induced Fos expression in cholinergic and glutamatergic PPN neurons in male mice, whereas cholinergic and glutamatergic neurons of the LDT were unresponsive. In contrast, acute or chronic ethanol at either dose or duration had no effect on the activation of cholinergic or glutamatergic neurons in the MPT of female mice. Female mice had higher level of baseline activation in cholinergic neurons compared with males. We also found a population of co-labeled cholinergic and glutamatergic neurons in the PPN and LDT which were highly active in the saline- and ethanol-treated groups in both sexes. These findings illustrate the complex differential effects of ethanol across dose, time point, MPT subregion and sex.
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Affiliation(s)
- S M Mulloy
- Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN, USA
| | - E M Aback
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - R Gao
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - S Engel
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - K Pawaskar
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - C Win
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - A Moua
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - L Hillukka
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | - A M Lee
- Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN, USA
- Department of Pharmacology, University of Minnesota, Minneapolis, MN, USA
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Spicer MM, Weber MA, Luo Z, Yang J, Narayanan NS, Fisher RA. Regulator of G protein signaling 6 (RGS6) in ventral tegmental area (VTA) dopamine neurons promotes EtOH seeking, behavioral reward and susceptibility to relapse. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.24.563844. [PMID: 37961154 PMCID: PMC10634791 DOI: 10.1101/2023.10.24.563844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Mesolimbic dopamine (DA) transmission is believed to play a critical role in mediating reward responses to drugs of abuse, including alcohol (EtOH). EtOH is the most abused substance worldwide with chronic consumption often leading to the development of dependence and abuse. Unfortunately, the neurobiological mechanisms underlying EtOH-seeking behavior and dependence are not fully understood, and abstinence remains the only effective way to prevent alcohol use disorders (AUDs). Here, we developed novel RGS6 fl/fl ; DAT-iCreER mice to determine the role of RGS6 in VTA DA neurons on EtOH consumption and reward behaviors. We found that RGS6 is expressed in DA neurons in both human and mouse VTA, and that RGS6 loss in mice upregulates DA transporter (DAT) expression in VTA DA neuron synaptic terminals. Remarkably, loss of RGS6 in VTA DA neurons significantly reduced EtOH consumption, preference, and reward in a manner indistinguishable from that seen in RGS6 -/- mice. Strikingly, RGS6 loss from VTA DA neurons before or after EtOH behavioral reward is established significantly reduced (∼50%) re-instatement of reward following extinguishment, demonstrating distinct roles of RGS6 in promoting reward and relapse susceptibility to EtOH. These studies illuminate a critical role of RGS6 in the mesolimbic circuit in promoting EtOH seeking, reward, and reinstatement. We propose that RGS6 functions to promote DA transmission through its function as a negative modulator of GPCR-Gα i/o -DAT signaling in VTA DA neurons. These studies identify RGS6 as a potential therapeutic target for behavioral reward and relapse to EtOH.
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Ren Z, Sun H, Xiu S, Yang N, Liu Y, Chan P. Investigation of rhodamine derivative on behavioral impairment in a double neurotoxin lesion of substantia nigra and locus coeruleus dysfunctional mice. Eur J Pharmacol 2023; 956:175944. [PMID: 37536627 DOI: 10.1016/j.ejphar.2023.175944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/11/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
Although multiple mechanisms have been studied, there is still a lack of effective treatment on non-motor symptoms in Parkinson's disease (PD) patients. Therapeutic effects of 5-(4-hydroxy-3-dimethoxybenzylidene)-thiazolidinone (RD-1), one of rhodamine derivatives, on motor recovery have been previously demonstrated, but its effects on non-motor symptoms remain unclear. Herein, we explored the beneficial effects of RD-1 on PD-related non-motor symptoms and changes in synaptic plasticity in the mesencephalon. To investigate its therapeutic effects in the non-motor symptoms of Parkinsonian model, we employed male C57BL/6N mice and double injection with noradrenergic specific neurotoxin N-2-Chloroethyl-N-ethyl-2-bromobenzylamine hydrochloride, followed 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine. Next, we performed behavioral tests, histological analyses and immunoblotting. Our findings showed that RD-1 significantly alleviated locomotor abnormality, motor disturbance, anxiety/depression-like behavior and memory deficit. It rescued the levels of tyrosine hydroxylase in substantia nigra, and striatum. Moreover, RD-1 upregulated expression levels of α-synuclein, synapsin II, postsynaptic density 95 and vesicle-associated membrane protein 2. The restoration of synaptic function may underlie the neuroprotective effects of RD-1 in double lesioned mice, confirming its protective effect for dopaminergic neurodegeneration.
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Affiliation(s)
- Zhili Ren
- Department of Neurobiology, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China.
| | - Hong Sun
- Department of Neurobiology, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China
| | - Shuangling Xiu
- Department of Endocrinology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Nan Yang
- Department of Pharmacology, Institute of Basic Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Yanyong Liu
- Department of Pharmacology, Institute of Basic Medical Sciences, Peking Union Medical College, Beijing, 100005, China.
| | - Piu Chan
- Department of Neurobiology, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital of Capital Medical University, Beijing Institute of Geriatrics, Beijing, China; Clinical Center for Parkinson's Disease, Capital Medical University, Key Laboratory for Neurodegenerative Disease of the Ministry of Education, Beijing Key Laboratory for Parkinson's Disease, Beijing, China; Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
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Schartz ND, Liang HY, Carvalho K, Chu SH, Mendoza-Arvilla A, Petrisko TJ, Gomez-Arboledas A, Mortazavi A, Tenner AJ. C5aR1 antagonism suppresses inflammatory glial gene expression and alters cellular signaling in an aggressive Alzheimer's model. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.22.554306. [PMID: 37662399 PMCID: PMC10473603 DOI: 10.1101/2023.08.22.554306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Alzheimer's disease (AD) is the leading cause of dementia in older adults, and the need for effective, sustainable therapeutic targets is imperative. Pharmacologic inhibition of C5aR1 reduces plaque load, gliosis and memory deficits in animal models. However, the cellular basis underlying this neuroprotection and which processes were the consequence of amyloid reduction vs alteration of the response to amyloid were unclear. In the Arctic model, the C5aR1 antagonist PMX205 did not reduce plaque load, but deficits in short-term memory in female mice were prevented. Hippocampal single cell and single nucleus RNA-seq clusters revealed C5aR1 dependent and independent gene expression and cell-cell communication. Microglial clusters containing neurotoxic disease-associated microglial genes were robustly upregulated in Arctic mice and drastically reduced with PMX205 treatment, while genes in microglia clusters that were overrepresented in the Arctic-PMX205 vs Arctic group were associated with synapse organization and transmission and learning. PMX205 treatment also reduced some A-1 astrocyte genes. In spite of changes in transcript levels, overall protein levels of some reactive glial markers were relatively unchanged by C5aR1 antagonism, as were clusters associated with protective responses to injury. C5aR1 inhibition promoted signaling pathways associated with cell growth and repair, such as TGFβ and FGF, in Arctic mice, while suppressing inflammatory pathways including PROS, Pecam1, and EPHA. In conclusion, pharmacologic C5aR1 inhibition prevents cognitive loss, limits microglial polarization to a detrimental inflammatory state and permits neuroprotective responses, as well as leaving protective functions of complement intact, making C5aR1 antagonism an attractive therapeutic strategy for individuals with AD.
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Affiliation(s)
- Nicole D. Schartz
- Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, CA 92697
| | - Heidi Y. Liang
- Department of Developmental & Cell Biology, University of California, Irvine, Irvine, CA 92697
| | - Klebea Carvalho
- Department of Developmental & Cell Biology, University of California, Irvine, Irvine, CA 92697
| | - Shu-Hui Chu
- Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, CA 92697
| | - Adrian Mendoza-Arvilla
- Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, CA 92697
| | - Tiffany J. Petrisko
- Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, CA 92697
| | - Angela Gomez-Arboledas
- Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, CA 92697
| | - Ali Mortazavi
- Department of Developmental & Cell Biology, University of California, Irvine, Irvine, CA 92697
| | - Andrea J. Tenner
- Department of Molecular Biology & Biochemistry, University of California, Irvine, Irvine, CA 92697
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, CA 92697
- Department of Pathology and Laboratory Medicine, University of California, Irvine, School of Medicine, Irvine, CA 92697
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