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Chiu J, Krupa JM, Seah C, Pasternak SH. Small GTPases control macropinocytosis of amyloid precursor protein and cleavage to amyloid-β. Heliyon 2024; 10:e31077. [PMID: 38799759 PMCID: PMC11126852 DOI: 10.1016/j.heliyon.2024.e31077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/03/2024] [Accepted: 05/09/2024] [Indexed: 05/29/2024] Open
Abstract
The overproduction of the toxic peptide amyloid-beta (Aβ) generated from the cleavage of amyloid precursor protein (APP) is proposed to be a critical event in the development of Alzheimer's disease. Evidence suggests that the cleavage of APP occurs after its internalization from the cell surface. Previously, we identified a novel pathway for APP internalization, which trafficks cell surface APP directly to lysosomes by macropinocytosis, leading to its processing into Aβ. We also demonstrated that ADP-ribosylation factor 6 (Arf6) is required for the macropinocytosis of APP. Here, we characterized the roles of Arf6's downstream effectors Rac1, Cdc42 and RhoA. Both pharmacological inhibition and siRNA knockdown of these proteins reduced the amount of APP colocalized with LAMP1-labeled lysosomes without affecting APP transport to early endosomes. Decreases in the production of both Aβ40 and Aβ42 were also observed by ELISA in response to inhibitor treatment. These findings together demonstrate that Rac1, Cdc42 and RhoA are components of the mechanism regulating the macropinocytosis of APP and targeting these components can reduce the production of Aβ.
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Affiliation(s)
- Justin Chiu
- Department of Physiology and Pharmacology, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Robarts Research Institute, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Jordan M. Krupa
- Neuroscience Program, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Robarts Research Institute, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Claudia Seah
- Robarts Research Institute, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Stephen H. Pasternak
- Department of Physiology and Pharmacology, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Neuroscience Program, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Robarts Research Institute, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Department of Clinical Neurological Sciences, The Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
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2
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Gusev E, Sarapultsev A. Interplay of G-proteins and Serotonin in the Neuroimmunoinflammatory Model of Chronic Stress and Depression: A Narrative Review. Curr Pharm Des 2024; 30:180-214. [PMID: 38151838 DOI: 10.2174/0113816128285578231218102020] [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: 10/04/2023] [Accepted: 11/29/2023] [Indexed: 12/29/2023]
Abstract
INTRODUCTION This narrative review addresses the clinical challenges in stress-related disorders such as depression, focusing on the interplay between neuron-specific and pro-inflammatory mechanisms at the cellular, cerebral, and systemic levels. OBJECTIVE We aim to elucidate the molecular mechanisms linking chronic psychological stress with low-grade neuroinflammation in key brain regions, particularly focusing on the roles of G proteins and serotonin (5-HT) receptors. METHODS This comprehensive review of the literature employs systematic, narrative, and scoping review methodologies, combined with systemic approaches to general pathology. It synthesizes current research on shared signaling pathways involved in stress responses and neuroinflammation, including calcium-dependent mechanisms, mitogen-activated protein kinases, and key transcription factors like NF-κB and p53. The review also focuses on the role of G protein-coupled neurotransmitter receptors (GPCRs) in immune and pro-inflammatory responses, with a detailed analysis of how 13 of 14 types of human 5-HT receptors contribute to depression and neuroinflammation. RESULTS The review reveals a complex interaction between neurotransmitter signals and immunoinflammatory responses in stress-related pathologies. It highlights the role of GPCRs and canonical inflammatory mediators in influencing both pathological and physiological processes in nervous tissue. CONCLUSION The proposed Neuroimmunoinflammatory Stress Model (NIIS Model) suggests that proinflammatory signaling pathways, mediated by metabotropic and ionotropic neurotransmitter receptors, are crucial for maintaining neuronal homeostasis. Chronic mental stress can disrupt this balance, leading to increased pro-inflammatory states in the brain and contributing to neuropsychiatric and psychosomatic disorders, including depression. This model integrates traditional theories on depression pathogenesis, offering a comprehensive understanding of the multifaceted nature of the condition.
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Affiliation(s)
- Evgenii Gusev
- Laboratory of Inflammation Immunology, Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Science, Ekaterinburg 620049, Russia
- Russian-Chinese Education and Research Center of System Pathology, South Ural State University, Chelyabinsk 454080, Russia
| | - Alexey Sarapultsev
- Russian-Chinese Education and Research Center of System Pathology, South Ural State University, Chelyabinsk 454080, Russia
- Laboratory of Immunopathophysiology, Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Science, Ekaterinburg 620049, Russia
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3
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Benarroch E. What Is the Role of the Rho-ROCK Pathway in Neurologic Disorders? Neurology 2023; 101:536-543. [PMID: 37722862 PMCID: PMC10516277 DOI: 10.1212/wnl.0000000000207779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 09/20/2023] Open
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4
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Hong Z, Chen X, Wang L, Zhou X, He H, Zou G, Liu Q, Wang Y. ROCK2-RNA interaction map reveals multiple biological mechanisms underlying tumor progression in renal cell carcinoma. Hum Cell 2023; 36:1790-1803. [PMID: 37418232 DOI: 10.1007/s13577-023-00947-x] [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: 03/12/2023] [Accepted: 06/24/2023] [Indexed: 07/08/2023]
Abstract
Renal cell carcinoma (RCC) is the most common form of kidney cancer in adults. Despite new therapeutic modalities, the outcomes for RCC patients remain unsatisfactory. Rho-associated coiled-coil forming protein kinase 2 (ROCK2) has previously been shown to be upregulated in RCC, and its expression was negatively correlated with patient survival. However, the precise molecular function of ROCK2 has remained unclear. Herein, using RNA-seq analysis of ROCK2 knockdown and control cells, we identified 464 differentially expressed genes, and 1287 alternative splicing events in 786-O RCC cells. Furthermore, mapping of iRIP-seq reads in 786-O cells showed a biased distribution at 5' UTR, intronic and intergenic regions. By comparing ROCK2-regulated alternative splicing and iRIP-seq data, we found 292 overlapping genes that are enriched in multiple tumorigenic pathways. Taken together, our work defined a complex ROCK2-RNA interaction map on a genomic scale in a human RCC cell line, which deepens our understanding of the molecular function of ROCK2 in cancer development.
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Affiliation(s)
- Zhengdong Hong
- Department of Urology Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xuexin Chen
- GMU-GIBH Joint School of Life Sciences, The Guangdong-Hong Kong-Macau Joint Laboratory for Cell Fate Regulation and Diseases, Guangzhou Medical University, Guangzhou, 511436, China
| | - Lei Wang
- School of Pharmacy, Nanchang Medical College, Nanchang, China
- Jiangxi Health Vocational College, Nanchang, China
| | - Xiaocheng Zhou
- Department of Urology Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Haowei He
- GMU-GIBH Joint School of Life Sciences, The Guangdong-Hong Kong-Macau Joint Laboratory for Cell Fate Regulation and Diseases, Guangzhou Medical University, Guangzhou, 511436, China
| | - Gaode Zou
- Department of Urology Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qingnan Liu
- GMU-GIBH Joint School of Life Sciences, The Guangdong-Hong Kong-Macau Joint Laboratory for Cell Fate Regulation and Diseases, Guangzhou Medical University, Guangzhou, 511436, China.
| | - Yiqian Wang
- GMU-GIBH Joint School of Life Sciences, The Guangdong-Hong Kong-Macau Joint Laboratory for Cell Fate Regulation and Diseases, Guangzhou Medical University, Guangzhou, 511436, China.
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Ferlazzo GM, Gambetta AM, Amato S, Cannizzaro N, Angiolillo S, Arboit M, Diamante L, Carbognin E, Romani P, La Torre F, Galimberti E, Pflug F, Luoni M, Giannelli S, Pepe G, Capocci L, Di Pardo A, Vanzani P, Zennaro L, Broccoli V, Leeb M, Moro E, Maglione V, Martello G. Genome-wide screening in pluripotent cells identifies Mtf1 as a suppressor of mutant huntingtin toxicity. Nat Commun 2023; 14:3962. [PMID: 37407555 DOI: 10.1038/s41467-023-39552-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/19/2023] [Indexed: 07/07/2023] Open
Abstract
Huntington's disease (HD) is a neurodegenerative disorder caused by CAG-repeat expansions in the huntingtin (HTT) gene. The resulting mutant HTT (mHTT) protein induces toxicity and cell death via multiple mechanisms and no effective therapy is available. Here, we employ a genome-wide screening in pluripotent mouse embryonic stem cells (ESCs) to identify suppressors of mHTT toxicity. Among the identified suppressors, linked to HD-associated processes, we focus on Metal response element binding transcription factor 1 (Mtf1). Forced expression of Mtf1 counteracts cell death and oxidative stress caused by mHTT in mouse ESCs and in human neuronal precursor cells. In zebrafish, Mtf1 reduces malformations and apoptosis induced by mHTT. In R6/2 mice, Mtf1 ablates motor defects and reduces mHTT aggregates and oxidative stress. Our screening strategy enables a quick in vitro identification of promising suppressor genes and their validation in vivo, and it can be applied to other monogenic diseases.
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Affiliation(s)
- Giorgia Maria Ferlazzo
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
- Aptuit (Verona) S.r.l., an Evotec Company, Campus Levi-Montalcini, 37135, Verona, Italy
| | - Anna Maria Gambetta
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
- Department of Biology, University of Padova, Via U. Bassi 58B, 35131, Padua, Italy
| | - Sonia Amato
- Department of Biology, University of Padova, Via U. Bassi 58B, 35131, Padua, Italy
- Department of Neuroscience, University of Padova, Via Belzoni, 160, 35131, Padua, Italy
| | - Noemi Cannizzaro
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | - Silvia Angiolillo
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | - Mattia Arboit
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | - Linda Diamante
- Department of Biology, University of Padova, Via U. Bassi 58B, 35131, Padua, Italy
| | - Elena Carbognin
- Department of Biology, University of Padova, Via U. Bassi 58B, 35131, Padua, Italy
| | - Patrizia Romani
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | - Federico La Torre
- Department of Biology, University of Padova, Via U. Bassi 58B, 35131, Padua, Italy
| | - Elena Galimberti
- Max Perutz Laboratories Vienna, University of Vienna, Vienna Biocenter, Dr Bohr Gasse 9, 1030, Vienna, Austria
| | - Florian Pflug
- Max Perutz Laboratories Vienna, University of Vienna, Vienna Biocenter, Dr Bohr Gasse 9, 1030, Vienna, Austria
| | - Mirko Luoni
- Division of Neuroscience, San Raffaele Scientific Institute, 20132, Milan, Italy
| | - Serena Giannelli
- Division of Neuroscience, San Raffaele Scientific Institute, 20132, Milan, Italy
| | | | | | | | - Paola Vanzani
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | - Lucio Zennaro
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | - Vania Broccoli
- Division of Neuroscience, San Raffaele Scientific Institute, 20132, Milan, Italy
- CNR Institute of Neuroscience, 20854, Vedrano al Lambro, Italy
| | - Martin Leeb
- Max Perutz Laboratories Vienna, University of Vienna, Vienna Biocenter, Dr Bohr Gasse 9, 1030, Vienna, Austria
| | - Enrico Moro
- Department of Molecular Medicine, Medical School, University of Padua, 35131, Padua, Italy
| | | | - Graziano Martello
- Department of Biology, University of Padova, Via U. Bassi 58B, 35131, Padua, Italy.
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Yin G, Huang J, Petela J, Jiang H, Zhang Y, Gong S, Wu J, Liu B, Shi J, Gao Y. Targeting small GTPases: emerging grasps on previously untamable targets, pioneered by KRAS. Signal Transduct Target Ther 2023; 8:212. [PMID: 37221195 DOI: 10.1038/s41392-023-01441-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/28/2023] [Accepted: 04/14/2023] [Indexed: 05/25/2023] Open
Abstract
Small GTPases including Ras, Rho, Rab, Arf, and Ran are omnipresent molecular switches in regulating key cellular functions. Their dysregulation is a therapeutic target for tumors, neurodegeneration, cardiomyopathies, and infection. However, small GTPases have been historically recognized as "undruggable". Targeting KRAS, one of the most frequently mutated oncogenes, has only come into reality in the last decade due to the development of breakthrough strategies such as fragment-based screening, covalent ligands, macromolecule inhibitors, and PROTACs. Two KRASG12C covalent inhibitors have obtained accelerated approval for treating KRASG12C mutant lung cancer, and allele-specific hotspot mutations on G12D/S/R have been demonstrated as viable targets. New methods of targeting KRAS are quickly evolving, including transcription, immunogenic neoepitopes, and combinatory targeting with immunotherapy. Nevertheless, the vast majority of small GTPases and hotspot mutations remain elusive, and clinical resistance to G12C inhibitors poses new challenges. In this article, we summarize diversified biological functions, shared structural properties, and complex regulatory mechanisms of small GTPases and their relationships with human diseases. Furthermore, we review the status of drug discovery for targeting small GTPases and the most recent strategic progress focused on targeting KRAS. The discovery of new regulatory mechanisms and development of targeting approaches will together promote drug discovery for small GTPases.
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Affiliation(s)
- Guowei Yin
- The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, 518107, China.
| | - Jing Huang
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Johnny Petela
- Wake Forest University School of Medicine, Winston-Salem, NC, 27101, USA
| | - Hongmei Jiang
- The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, 518107, China
| | - Yuetong Zhang
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Siqi Gong
- The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, 518107, China
- School of Medicine, Sun Yat-Sen University, Shenzhen, 518107, China
| | - Jiaxin Wu
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Bei Liu
- National Biomedical Imaging Center, School of Future Technology, Peking University, Beijing, 100871, China
| | - Jianyou Shi
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology, Chengdu, 610072, China.
| | - Yijun Gao
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
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González B, Aldea M, Cullen PJ. Chaperone-Dependent Degradation of Cdc42 Promotes Cell Polarity and Shields the Protein from Aggregation. Mol Cell Biol 2023; 43:200-222. [PMID: 37114947 PMCID: PMC10184603 DOI: 10.1080/10985549.2023.2198171] [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: 11/29/2022] [Revised: 03/02/2023] [Accepted: 03/06/2023] [Indexed: 04/29/2023] Open
Abstract
Rho GTPases are global regulators of cell polarity and signaling. By exploring the turnover regulation of the yeast Rho GTPase Cdc42p, we identified new regulatory features surrounding the stability of the protein. We specifically show that Cdc42p is degraded at 37 °C by chaperones through lysine residues located in the C-terminus of the protein. Cdc42p turnover at 37 °C occurred by the 26S proteasome in an ESCRT-dependent manner in the lysosome/vacuole. By analyzing versions of Cdc42p that were defective for turnover, we show that turnover at 37 °C promoted cell polarity but was defective for sensitivity to mating pheromone, presumably mediated through a Cdc42p-dependent MAP kinase pathway. We also identified one residue (K16) in the P-loop of the protein that was critical for Cdc42p stability. Accumulation of Cdc42pK16R in some contexts led to the formation of protein aggregates, which were enriched in aging mother cells and cells undergoing proteostatic stress. Our study uncovers new aspects of protein turnover regulation of a Rho-type GTPase that may extend to other systems. Moreover, residues identified here that mediate Cdc42p turnover correlate with several human diseases, which may suggest that turnover regulation of Cdc42p is important to aspects of human health.
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Affiliation(s)
- Beatriz González
- Department of Biological Sciences, State University of New York at Buffalo, New York, USA
| | - Martí Aldea
- Molecular Biology Institute of Barcelona (IBMB), CSIC, Barcelona, Spain
| | - Paul J. Cullen
- Department of Biological Sciences, State University of New York at Buffalo, New York, USA
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8
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Role of a small GTPase Cdc42 in aging and age-related diseases. Biogerontology 2023; 24:27-46. [PMID: 36598630 DOI: 10.1007/s10522-022-10008-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/13/2022] [Indexed: 01/05/2023]
Abstract
A small GTPase, Cdc42 is evolutionarily one of the most ancient members of the Rho family, which is ubiquitously expressed and involved in a wide range of fundamental cellular functions. The crucial role of Cdc42 includes regulation of the actin cytoskeleton, cell polarity, morphology and migration, endocytosis and exocytosis, cell cycle, and proliferation in many different cell types. Many studies have provided compelling yet contradicting evidence that Cdc42 dysregulation plays an important role in cellular and tissue aging. Furthermore, Cdc42 is a critical factor in the development and progression of aging-related pathologies, such as neurodegenerative and cardiovascular disorders, diabetes type 2, and aging-related disorders of the joints and bones, and the inhibition of the Cdc42 demonstrates potentially significant therapeutic and anti-aging effects in animal models of aging and disease. However, regulation of Cdc42 expression and activity is very complex and depends on many factors, such as the origin and complexity of the tissues, hormonal status, etc. Therefore, this review is focused on current advances in understanding the underlying cellular and molecular mechanisms associated with Cdc42 activity and regulation of senescence in different cell types since they may provide a foundation for novel therapeutic strategies and targeted drugs to reverse the aging process and treat aging-associated disorders.
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Nik Akhtar S, Bunner WP, Brennan E, Lu Q, Szatmari EM. Crosstalk between the Rho and Rab family of small GTPases in neurodegenerative disorders. Front Cell Neurosci 2023; 17:1084769. [PMID: 36779014 PMCID: PMC9911442 DOI: 10.3389/fncel.2023.1084769] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 01/06/2023] [Indexed: 01/28/2023] Open
Abstract
Neurodegeneration is associated with defects in cytoskeletal dynamics and dysfunctions of the vesicular trafficking and sorting systems. In the last few decades, studies have demonstrated that the key regulators of cytoskeletal dynamics are proteins from the Rho family GTPases, meanwhile, the central hub for vesicle sorting and transport between target membranes is the Rab family of GTPases. In this regard, the role of Rho and Rab GTPases in the induction and maintenance of distinct functional and morphological neuronal domains (such as dendrites and axons) has been extensively studied. Several members belonging to these two families of proteins have been associated with many neurodegenerative disorders ranging from dementia to motor neuron degeneration. In this analysis, we attempt to present a brief review of the potential crosstalk between the Rab and Rho family members in neurodegenerative pathologies such as Alzheimer's disease (AD), Parkinson's disease (PD), Huntington disease, and amyotrophic lateral sclerosis (ALS).
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Affiliation(s)
- Shayan Nik Akhtar
- The Harriet and John Wooten Laboratory for Alzheimer’s and Neurodegenerative Diseases Research, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Wyatt P. Bunner
- Laboratory of Neuroscience, Department of Physical Therapy, College of Allied Health Sciences, East Carolina University, Greenville, NC, United States
| | - Elizabeth Brennan
- Laboratory of Neuroscience, Department of Physical Therapy, College of Allied Health Sciences, East Carolina University, Greenville, NC, United States
| | - Qun Lu
- The Harriet and John Wooten Laboratory for Alzheimer’s and Neurodegenerative Diseases Research, Brody School of Medicine, East Carolina University, Greenville, NC, United States,*Correspondence: Erzsebet M. Szatmari Qun Lu
| | - Erzsebet M. Szatmari
- Laboratory of Neuroscience, Department of Physical Therapy, College of Allied Health Sciences, East Carolina University, Greenville, NC, United States,*Correspondence: Erzsebet M. Szatmari Qun Lu
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10
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Yu JH, Moon EY, Kim J, Koo JH. Identification of Small GTPases That Phosphorylate IRF3 through TBK1 Activation Using an Active Mutant Library Screen. Biomol Ther (Seoul) 2023; 31:48-58. [PMID: 36579460 PMCID: PMC9810446 DOI: 10.4062/biomolther.2022.119] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/22/2022] [Accepted: 09/26/2022] [Indexed: 12/30/2022] Open
Abstract
Interferon regulatory factor 3 (IRF3) integrates both immunological and non-immunological inputs to control cell survival and death. Small GTPases are versatile functional switches that lie on the very upstream in signal transduction pathways, of which duration of activation is very transient. The large number of homologous proteins and the requirement for site-directed mutagenesis have hindered attempts to investigate the link between small GTPases and IRF3. Here, we constructed a constitutively active mutant expression library for small GTPase expression using Gibson assembly cloning. Small-scale screening identified multiple GTPases capable of promoting IRF3 phosphorylation. Intriguingly, 27 of 152 GTPases, including ARF1, RHEB, RHEBL1, and RAN, were found to increase IRF3 phosphorylation. Unbiased screening enabled us to investigate the sequence-activity relationship between the GTPases and IRF3. We found that the regulation of IRF3 by small GTPases was dependent on TBK1. Our work reveals the significant contribution of GTPases in IRF3 signaling and the potential role of IRF3 in GTPase function, providing a novel therapeutic approach against diseases with GTPase overexpression or active mutations, such as cancer.
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Affiliation(s)
- Jae-Hyun Yu
- Department of Pharmacology and Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea,College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun-Yi Moon
- Department of Bioscience and Biotechnology, Sejong University, Seoul 05006, Republic of Korea
| | - Jiyoon Kim
- Department of Pharmacology and Department of Biomedicine & Health Sciences, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea,Corresponding Authors E-mail: (Kim J), (Koo JH), Tel: +82-2-3147-8358 (Kim J), +82-2-880-7839 (Koo JH), Fax: +82-2-536-2485 (Kim J), +82-2-888-9122 (Koo JH)
| | - Ja Hyun Koo
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea,Corresponding Authors E-mail: (Kim J), (Koo JH), Tel: +82-2-3147-8358 (Kim J), +82-2-880-7839 (Koo JH), Fax: +82-2-536-2485 (Kim J), +82-2-888-9122 (Koo JH)
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Key role of Rho GTPases in motor disorders associated with neurodevelopmental pathologies. Mol Psychiatry 2023; 28:118-126. [PMID: 35918397 DOI: 10.1038/s41380-022-01702-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 06/24/2022] [Accepted: 07/02/2022] [Indexed: 01/07/2023]
Abstract
Growing evidence suggests that Rho GTPases and molecules involved in their signaling pathways play a major role in the development of the central nervous system (CNS). Whole exome sequencing (WES) and de novo examination of mutations, including SNP (Single Nucleotide Polymorphism) in genes coding for the molecules of their signaling cascade, has allowed the recent discovery of dominant autosomic mutations and duplication or deletion of candidates in the field of neurodevelopmental diseases (NDD). Epidemiological studies show that the co-occurrence of several of these neurological pathologies may indeed be the rule. The regulators of Rho GTPases have often been considered for cognitive diseases such as intellectual disability (ID) and autism. But, in a remarkable way, mild to severe motor symptoms are now reported in autism and other cognitive NDD. Although a more abundant litterature reports the involvement of Rho GTPases and signaling partners in cognitive development, molecular investigations on their roles in central nervous system (CNS) development or degenerative CNS pathologies also reveal their role in embryonic and perinatal motor wiring through axon guidance and later in synaptic plasticity. Thus, Rho family small GTPases have been revealed to play a key role in brain functions including learning and memory but their precise role in motor development and associated symptoms in NDD has been poorly scoped so far, despite increasing clinical data highlighting the links between cognition and motor development. Indeed, early impairements in fine or gross motor performance is often an associated feature of NDDs, which then impact social communication, cognition, emotion, and behavior. We review here recent insights derived from clinical developmental neurobiology in the field of Rho GTPases and NDD (autism spectrum related disorder (ASD), ID, schizophrenia, hypotonia, spastic paraplegia, bipolar disorder and dyslexia), with a specific focus on genetic alterations affecting Rho GTPases that are involved in motor circuit development.
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Donta MS, Srivastava Y, Di Mauro CM, Paulucci-Holthauzen A, Waxham MN, McCrea PD. p120-catenin subfamily members have distinct as well as shared effects on dendrite morphology during neuron development in vitro. Front Cell Neurosci 2023; 17:1151249. [PMID: 37082208 PMCID: PMC10112520 DOI: 10.3389/fncel.2023.1151249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 03/21/2023] [Indexed: 04/22/2023] Open
Abstract
Dendritic arborization is essential for proper neuronal connectivity and function. Conversely, abnormal dendrite morphology is associated with several neurological pathologies like Alzheimer's disease and schizophrenia. Among major intrinsic mechanisms that determine the extent of the dendritic arbor is cytoskeletal remodeling. Here, we characterize and compare the impact of the four proteins involved in cytoskeletal remodeling-vertebrate members of the p120-catenin subfamily-on neuronal dendrite morphology. In relation to each of their own distributions, we find that p120-catenin and delta-catenin are expressed at relatively higher proportions in growth cones compared to ARVCF-catenin and p0071-catenin; ARVCF-catenin is expressed at relatively high proportions in the nucleus; and all catenins are expressed in dendritic processes and the soma. Through altering the expression of each p120-subfamily catenin in neurons, we find that exogenous expression of either p120-catenin or delta-catenin correlates with increased dendritic length and branching, whereas their respective depletion decreases dendritic length and branching. While increasing ARVCF-catenin expression also increases dendritic length and branching, decreasing expression has no grossly observable morphological effect. Finally, increasing p0071-catenin expression increases dendritic branching, but not length, while decreasing expression decreases dendritic length and branching. These distinct localization patterns and morphological effects during neuron development suggest that these catenins have both shared and distinct roles in the context of dendrite morphogenesis.
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Affiliation(s)
- Maxsam S. Donta
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Program in Genetics and Epigenetics, Graduate School of Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Yogesh Srivastava
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Christina M. Di Mauro
- Department of Neurobiology and Anatomy, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | | | - M. Neal Waxham
- Department of Neurobiology and Anatomy, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Program in Neuroscience, Graduate School of Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
- *Correspondence: M. Neal Waxham,
| | - Pierre D. McCrea
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Program in Genetics and Epigenetics, Graduate School of Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Program in Neuroscience, Graduate School of Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Pierre D. McCrea,
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13
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Chen M, Jia S, Xue M, Huang H, Xu Z, Yang D, Zhu W, Song Q. Dual-Stream Subspace Clustering Network for revealing gene targets in Alzheimer's disease. Comput Biol Med 2022; 151:106305. [PMID: 36401971 DOI: 10.1016/j.compbiomed.2022.106305] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 11/02/2022] [Accepted: 11/06/2022] [Indexed: 11/13/2022]
Abstract
The rapid development of scRNA-seq technology in recent years has enabled us to capture high-throughput gene expression profiles at single-cell resolution, reveal the heterogeneity of complex cell populations, and greatly advance our understanding of the underlying mechanisms in human diseases. Traditional methods for gene co-expression clustering are limited to discovering effective gene groups in scRNA-seq data. In this paper, we propose a novel gene clustering method based on convolutional neural networks called Dual-Stream Subspace Clustering Network (DS-SCNet). DS-SCNet can accurately identify important gene clusters from large scales of single-cell RNA-seq data and provide useful information for downstream analysis. Based on the simulated datasets, DS-SCNet successfully clusters genes into different groups and outperforms mainstream gene clustering methods, such as DBSCAN and DESC, across different evaluation metrics. To explore the biological insights of our proposed method, we applied it to real scRNA-seq data of patients with Alzheimer's disease (AD). DS-SCNet analyzed the single-cell RNA-seq data with 10,850 genes, and accurately identified 8 optimal clusters from 6673 cells. Enrichment analysis of these gene clusters revealed functional signaling pathways including the ILS signaling, the Rho GTPase signaling, and hemostasis pathways. Further analysis of gene regulatory networks identified new hub genes such as ELF4 as important regulators of AD, which indicates that DS-SCNet contributes to the discovery and understanding of the pathogenesis in Alzheimer's disease.
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Affiliation(s)
- Minghan Chen
- Department of Computer Science, Wake Forest University, Winston-Salem, NC, USA
| | - Shishen Jia
- School of Automation, Hangzhou Dianzi University, Hangzhou, Zhejiang, China
| | - Mengfan Xue
- School of Automation, Hangzhou Dianzi University, Hangzhou, Zhejiang, China; Zhejiang Lab, Hangzhou, Zhejiang, China
| | | | - Ziang Xu
- Department of Computer Science, Wake Forest University, Winston-Salem, NC, USA
| | - Defu Yang
- Zhejiang Lab, Hangzhou, Zhejiang, China
| | - Wentao Zhu
- Zhejiang Lab, Hangzhou, Zhejiang, China.
| | - Qianqian Song
- Center for Cancer Genomics and Precision Oncology, Wake Forest Baptist Comprehensive Cancer Center, Wake Forest Baptist Medical Center, Winston Salem, NC, USA; Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, NC, USA.
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14
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Kholmanskikh S, Singh S, Ross ME. Activation of RhoC by regulatory ubiquitination is mediated by LNX1 and suppressed by LIS1. Sci Rep 2022; 12:16493. [PMID: 36192543 PMCID: PMC9529947 DOI: 10.1038/s41598-022-19740-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 09/02/2022] [Indexed: 11/09/2022] Open
Abstract
Regulation of Rho GTPases remains a topic of active investigation as they are essential participants in cell biology and the pathophysiology of many human diseases. Non-degrading ubiquitination (NDU) is a critical regulator of the Ras superfamily, but its relevance to Rho proteins remains unknown. We show that RhoC, but not RhoA, is a target of NDU by E3 ubiquitin ligase, LNX1. Furthermore, LNX1 ubiquitination of RhoC is negatively regulated by LIS1 (aka, PAFAH1B1). Despite multiple reports of functional interaction between LIS1 and activity of Rho proteins, a robust mechanism linking the two has been lacking. Here, LIS1 inhibition of LNX1 effects on RhoGDI-RhoC interaction provides a molecular mechanism underpinning the enhanced activity of Rho proteins observed upon reduction in LIS1 protein levels. Since LNX1 and RhoC are only found in vertebrates, the LIS1-LNX1-RhoC module represents an evolutionarily acquired function of the highly conserved LIS1. While these nearly identical proteins have several distinct RhoA and RhoC downstream effectors, our data provide a rare example of Rho-isoform specific, upstream regulation that opens new therapeutic opportunities.
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Affiliation(s)
- Stanislav Kholmanskikh
- Center for Neurogenetics, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, 413 East 69th St, Box 240, New York, NY, 10021, USA.
| | - Shawn Singh
- Center for Neurogenetics, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, 413 East 69th St, Box 240, New York, NY, 10021, USA
| | - M Elizabeth Ross
- Center for Neurogenetics, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, 413 East 69th St, Box 240, New York, NY, 10021, USA.
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15
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C. Silva T, Young JI, Zhang L, Gomez L, Schmidt MA, Varma A, Chen XS, Martin ER, Wang L. Cross-tissue analysis of blood and brain epigenome-wide association studies in Alzheimer's disease. Nat Commun 2022; 13:4852. [PMID: 35982059 PMCID: PMC9388493 DOI: 10.1038/s41467-022-32475-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 08/01/2022] [Indexed: 01/17/2023] Open
Abstract
To better understand DNA methylation in Alzheimer's disease (AD) from both mechanistic and biomarker perspectives, we performed an epigenome-wide meta-analysis of blood DNA methylation in two large independent blood-based studies in AD, the ADNI and AIBL studies, and identified 5 CpGs, mapped to the SPIDR, CDH6 genes, and intergenic regions, that are significantly associated with AD diagnosis. A cross-tissue analysis that combined these blood DNA methylation datasets with four brain methylation datasets prioritized 97 CpGs and 10 genomic regions that are significantly associated with both AD neuropathology and AD diagnosis. An out-of-sample validation using the AddNeuroMed dataset showed the best performing logistic regression model includes age, sex, immune cell type proportions, and methylation risk score based on prioritized CpGs in cross-tissue analysis (AUC = 0.696, 95% CI: 0.616 - 0.770, P-value = 2.78 × 10-5). Our study offers new insights into epigenetics in AD and provides a valuable resource for future AD biomarker discovery.
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Affiliation(s)
- Tiago C. Silva
- grid.26790.3a0000 0004 1936 8606Division of Biostatistics, Department of Public Health Sciences, University of Miami, Miller School of Medicine, Miami, FL 33136 USA
| | - Juan I. Young
- grid.26790.3a0000 0004 1936 8606Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miller School of Medicine, Miami, FL 33136 USA ,grid.26790.3a0000 0004 1936 8606John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136 USA
| | - Lanyu Zhang
- grid.26790.3a0000 0004 1936 8606Division of Biostatistics, Department of Public Health Sciences, University of Miami, Miller School of Medicine, Miami, FL 33136 USA
| | - Lissette Gomez
- grid.26790.3a0000 0004 1936 8606John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136 USA
| | - Michael A. Schmidt
- grid.26790.3a0000 0004 1936 8606John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136 USA
| | - Achintya Varma
- grid.26790.3a0000 0004 1936 8606John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136 USA
| | - X. Steven Chen
- grid.26790.3a0000 0004 1936 8606Division of Biostatistics, Department of Public Health Sciences, University of Miami, Miller School of Medicine, Miami, FL 33136 USA ,grid.26790.3a0000 0004 1936 8606Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, FL 33136 USA
| | - Eden R. Martin
- grid.26790.3a0000 0004 1936 8606Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miller School of Medicine, Miami, FL 33136 USA ,grid.26790.3a0000 0004 1936 8606John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136 USA
| | - Lily Wang
- grid.26790.3a0000 0004 1936 8606Division of Biostatistics, Department of Public Health Sciences, University of Miami, Miller School of Medicine, Miami, FL 33136 USA ,grid.26790.3a0000 0004 1936 8606Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miller School of Medicine, Miami, FL 33136 USA ,grid.26790.3a0000 0004 1936 8606John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136 USA ,grid.26790.3a0000 0004 1936 8606Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, FL 33136 USA
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16
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Chen ML, Wu RM. Homozygous mutation of the LRRK2 ROC domain as a novel genetic model of parkinsonism. J Biomed Sci 2022; 29:60. [PMID: 35965315 PMCID: PMC9375908 DOI: 10.1186/s12929-022-00844-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 08/05/2022] [Indexed: 11/25/2022] Open
Abstract
Background Parkinson’s disease (PD) is one of the most important neurodegenerative disorders in elderly people. Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are found in a large proportion of the patients with sporadic and familial PD. Mutations can occur at different locations in the LRRK2. Patients with LRRK2 ROC-COR mutations face an increased risk of typical motor symptoms of PD, along with cognitive decline. An animal model with a monogenic LRRK2 gene mutation is a suitable model for exploring the pathophysiology of PD and identifying potential drug therapies. However, the effect of homozygous (HOM) LRRK2 in PD pathophysiology is unclear. Methods We established human LRRK2 (hLRRK2) R1441G HOM transgenic (Tg) mice to explore the phenotype and pathological features that are associated with hLRRK2 R1441G Tg mouse models and discuss the potential clinical relevance. The open field test (OFT) was performed to examine motor and nonmotor behaviors. A CatWalk analysis system was used to study gait function. [18F]FDOPA PET was used to investigate functional changes in the nigrostriatal pathway in vivo. Transmission electron microscopy was used to examine the morphological changes in mitochondria and lysosomes in the substantia nigra. Results The R1441G HOM Tg mice demonstrated gait disturbance and exhibited less anxiety-related behavior and exploratory behavior than mice with hLRRK2 at 12 months old. Additionally, [18F]FDOPA PET showed a reduction in FDOPA uptake in the striatum of the HOM Tg mice. Notably, there was significant lysosome and autophagosome accumulation in the cytoplasm of dopaminergic neurons in R1441G hemizygous (HEM) and HOM mice. Moreover, it was observed using transmission electron microscopy (TEM) that the mitochondria of R1441G Tg mice were smaller than those of hLRRK2 mice. Conclusion This animal provides a novel HOM hLRRK2 R1441G Tg mouse model that reproduces some phenotype of Parkinsonism in terms of both motor and behavioral dysfunction. There is an increased level of mitochondrial fission and no change in the fusion process in the group of HOM hLRRK2 R1441G Tg mouse. This mutant animal model of PD might be used to study the mechanisms of mitochondrial dysfunction and explore potential new drug targets. Supplementary Information The online version contains supplementary material available at 10.1186/s12929-022-00844-9.
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17
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Donta MS, Srivastava Y, McCrea PD. Delta-Catenin as a Modulator of Rho GTPases in Neurons. Front Cell Neurosci 2022; 16:939143. [PMID: 35860313 PMCID: PMC9289679 DOI: 10.3389/fncel.2022.939143] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/09/2022] [Indexed: 12/03/2022] Open
Abstract
Small Rho GTPases are molecular switches that are involved in multiple processes including regulation of the actin cytoskeleton. These GTPases are activated (turned on) and inactivated (turned off) through various upstream effector molecules to carry out many cellular functions. One such upstream modulator of small Rho GTPase activity is delta-catenin, which is a protein in the p120-catenin subfamily that is enriched in the central nervous system. Delta-catenin affects small GTPase activity to assist in the developmental formation of dendrites and dendritic spines and to maintain them once they mature. As the dendritic arbor and spine density are crucial for synapse formation and plasticity, delta-catenin’s ability to modulate small Rho GTPases is necessary for proper learning and memory. Accordingly, the misregulation of delta-catenin and small Rho GTPases has been implicated in several neurological and non-neurological pathologies. While links between delta-catenin and small Rho GTPases have yet to be studied in many contexts, known associations include some cancers, Alzheimer’s disease (AD), Cri-du-chat syndrome, and autism spectrum disorder (ASD). Drawing from established studies and recent discoveries, this review explores how delta-catenin modulates small Rho GTPase activity. Future studies will likely elucidate how PDZ proteins that bind delta-catenin further influence small Rho GTPases, how delta-catenin may affect small GTPase activity at adherens junctions when bound to N-cadherin, mechanisms behind delta-catenin’s ability to modulate Rac1 and Cdc42, and delta-catenin’s ability to modulate small Rho GTPases in the context of diseases, such as cancer and AD.
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Affiliation(s)
- Maxsam S. Donta
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Program in Genetics and Epigenetics, The University of Texas MD Anderson Cancer Center University of Texas Health Science Center Houston Graduate School of Biomedical Science, Houston, TX, United States
- *Correspondence: Maxsam S. Donta,
| | - Yogesh Srivastava
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Pierre D. McCrea
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Program in Genetics and Epigenetics, The University of Texas MD Anderson Cancer Center University of Texas Health Science Center Houston Graduate School of Biomedical Science, Houston, TX, United States
- Program in Neuroscience, The University of Texas MD Anderson Cancer Center University of Texas Health Science Center Houston Graduate School of Biomedical Science, Houston, TX, United States
- Pierre D. McCrea,
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18
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Bagnell AM, Sumner CJ, McCray BA. TRPV4: A trigger of pathological RhoA activation in neurological disease. Bioessays 2022; 44:e2100288. [PMID: 35297520 PMCID: PMC9295809 DOI: 10.1002/bies.202100288] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 12/14/2022]
Abstract
Transient receptor potential vanilloid 4 (TRPV4), a member of the TRP superfamily, is a broadly expressed, cell surface-localized cation channel that is activated by a variety of environmental stimuli. Importantly, TRPV4 has been increasingly implicated in the regulation of cellular morphology. Here we propose that TRPV4 and the cytoskeletal remodeling small GTPase RhoA together constitute an environmentally sensitive signaling complex that contributes to pathological cell cytoskeletal alterations during neurological injury and disease. Supporting this hypothesis is our recent work demonstrating direct physical and bidirectional functional interactions of TRPV4 with RhoA, which can lead to activation of RhoA and reorganization of the actin cytoskeleton. Furthermore, a confluence of evidence implicates TRPV4 and/or RhoA in pathological responses triggered by a range of acute neurological insults ranging from stroke to traumatic injury. While initiated by a variety of insults, TRPV4-RhoA signaling may represent a common pathway that disrupts axonal regeneration and blood-brain barrier integrity. These insights also suggest that TRPV4 inhibition may represent a safe, feasible, and precise therapeutic strategy for limiting pathological TRPV4-RhoA activation in a range of neurological diseases.
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Affiliation(s)
- Anna M. Bagnell
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Charlotte J. Sumner
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Brett A. McCray
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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19
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Deng Y, Song H, Xiao Y, Zhao Y, Chu L, Ding J, Shen X, Qi X. High-Throughput Sequencing to Investigate lncRNA-circRNA-miRNA-mRNA Networks Underlying the Effects of Beta-Amyloid Peptide and Senescence on Astrocytes. Front Genet 2022; 13:868856. [PMID: 35646066 PMCID: PMC9133720 DOI: 10.3389/fgene.2022.868856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 03/25/2022] [Indexed: 11/21/2022] Open
Abstract
Astrocytes are widely distributed in the central nervous system and play an essential role in the function of neuronal cells. Associations between astrocytes and Alzheimer’s disease (AD) have been noted, and recent work has implicated circular RNA (circRNA) and long non-coding RNA (lncRNA) in the development of AD. However, few reports have investigated which lncRNA and circRNA are involved in the influence of amyloid beta (Aβ) and senescence on astrocytes. This study therefore examines changes at the transcriptome level to explore the effects of Aβ and senescence on astrocytes. Primary cultured astrocytes were treated with Aβ and cultured for 90 days in vitro, and high-throughput sequencing was performed to identify differentially expressed RNAs. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses revealed that differentially expressed genes were associated with the focal adhesion signaling pathway, extracellular matrix receptor signaling pathway, and the extracellular matrix. The protein–protein interaction network was then constructed, and 103 hub genes were screened out; most of these were strongly associated with the expression of the extracellular matrix, extracellular matrix receptor signaling pathway, and focal adhesion. Two competing endogenous RNA networks were constructed based on the selected hub gene and differential RNAs, and we identified multiple competing endogenous RNA regulatory axes that were involved in the effects of Aβ and senescence on astrocytes. This is the first study to explore the molecular regulation mechanism of Aβ and senescence on primary astrocytes from the perspective of the whole transcriptome. In uncovering the signaling pathways and biological processes involved in the effects of Aβ and senescence on astrocytes, this work provides novel insights into the pathogenesis of AD at the level of competing endogenous RNA network regulation.
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Affiliation(s)
- Yuxin Deng
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Hui Song
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Yan Xiao
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Yi Zhao
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
| | - Liangzao Chu
- Department of Neurosurgery, Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Jiuyang Ding
- School of Forensic Medicine, Guizhou Medical University, Guiyang, China
| | - Xiangchun Shen
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang, China
- *Correspondence: Xiangchun Shen, ; Xiaolan Qi,
| | - Xiaolan Qi
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education and Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
- *Correspondence: Xiangchun Shen, ; Xiaolan Qi,
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20
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RhoA Signaling in Neurodegenerative Diseases. Cells 2022; 11:cells11091520. [PMID: 35563826 PMCID: PMC9103838 DOI: 10.3390/cells11091520] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 04/25/2022] [Accepted: 04/29/2022] [Indexed: 02/04/2023] Open
Abstract
Ras homolog gene family member A (RhoA) is a small GTPase of the Rho family involved in regulating multiple signal transduction pathways that influence a diverse range of cellular functions. RhoA and many of its downstream effector proteins are highly expressed in the nervous system, implying an important role for RhoA signaling in neurons and glial cells. Indeed, emerging evidence points toward a role of aberrant RhoA signaling in neurodegenerative diseases such as Parkinson’s disease, Alzheimer’s disease, Huntington’s disease, and amyotrophic lateral sclerosis. In this review, we summarize the current knowledge of RhoA regulation and downstream cellular functions with an emphasis on the role of RhoA signaling in neurodegenerative diseases and the therapeutic potential of RhoA inhibition in neurodegeneration.
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21
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Lu Q, Chen YH. TRPV4: En RhoA To a Cure? Bioessays 2022; 44:e2200071. [PMID: 35441721 DOI: 10.1002/bies.202200071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 04/08/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Qun Lu
- Department of Anatomy and Cell Biology, The Brody School of Medicine at East Carolina University, Greenville, North Carolina, USA.,The Harriet and John Wooten Laboratory for Alzheimer's and Neurodegenerative Diseases Research, The Brody School of Medicine at East Carolina University, Greenville, North Carolina, USA
| | - Yan-Hua Chen
- Department of Anatomy and Cell Biology, The Brody School of Medicine at East Carolina University, Greenville, North Carolina, USA
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22
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Zhu Z, Lu J, Wang S, Peng W, Yang Y, Chen C, Zhou X, Yang X, Xin W, Chen X, Pi J, Yin W, Yao L, Pi R. Acrolein, an endogenous aldehyde induces synaptic dysfunction in vitro and in vivo: Involvement of RhoA/ROCK2 pathway. Aging Cell 2022; 21:e13587. [PMID: 35315217 PMCID: PMC9009232 DOI: 10.1111/acel.13587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/19/2022] [Accepted: 02/25/2022] [Indexed: 11/29/2022] Open
Abstract
Acrolein, an unsaturated aldehyde, is increased in the brain of Alzheimer's disease (AD) patients and identified as a potential inducer of sporadic AD. Synaptic dysfunction, as a typical pathological change occurring in the early stage of AD, is most closely associated with the severity of dementia. However, there remains a lack of clarity on the mechanisms of acrolein inducing AD-like pathology and synaptic impairment. In this study, acrolein-treated primary cultured neurons and mice were applied to investigate the effects of acrolein on cognitive impairment and synaptic dysfunction and their signaling mechanisms. In vitro, ROCK inhibitors, Fasudil, and Y27632, could attenuate the axon ruptures and synaptic impairment caused by acrolein. Meanwhile, RNA-seq distinct differentially expressed genes in acrolein models and initially linked activated RhoA/Rho-kinase2 (ROCK2) to acrolein-induced synaptic dysfunction, which could regulate neuronal cytoskeleton and neurite. The Morris water maze test and in vivo field excitatory postsynaptic potential (fEPSP) were performed to evaluate spatial memory and long-term potential (LTP), respectively. Acrolein induced cognitive impairment and attenuated LTP. Furthermore, the protein level of Synapsin 1 and postsynaptic density 95 (PSD95) and dendritic spines density were also decreased in acrolein-exposed mice. These changes were improved by ROCK2 inhibitor Fasudil or in ROCK2+/- mice. Together, our findings suggest that RhoA/ROCK2 signaling pathway plays a critical role in acrolein-induced synaptic damage and cognitive dysfunction, suggesting inhibition of ROCK2 should benefit to the early AD.
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Affiliation(s)
- Zeyu Zhu
- School of Medicine Sun Yat‐Sen University Guangzhou China
- School of Pharmaceutical Sciences Sun Yat‐Sen University Guangzhou China
| | - Junfeng Lu
- School of Pharmaceutical Sciences Sun Yat‐Sen University Guangzhou China
- Department of Internal Medicine The Affiliated Tumor Hospital of Zhengzhou University Zhengzhou China
| | - Shuyi Wang
- School of Medicine Sun Yat‐Sen University Guangzhou China
| | - Weijia Peng
- School of Pharmaceutical Sciences Sun Yat‐Sen University Guangzhou China
| | - Yang Yang
- School of Medicine Sun Yat‐Sen University Guangzhou China
| | - Chen Chen
- School of Pharmaceutical Sciences Sun Yat‐Sen University Guangzhou China
| | - Xin Zhou
- Zhongshan School of Medicine Sun Yat‐Sen University Guangzhou China
| | - Xifei Yang
- Key Laboratory of Modern Toxicology of Shenzhen Center for Disease Control and Prevention
| | - Wenjun Xin
- Zhongshan School of Medicine Sun Yat‐Sen University Guangzhou China
| | - Xinyi Chen
- School of Pharmaceutical Sciences South China Research Center for Acupuncture and Moxibustion Guangzhou University of Chinese Medicine Guangzhou China
| | - Jiakai Pi
- Guangzhou Foreign Language School Guangzhou China
| | - Wei Yin
- Zhongshan School of Medicine Sun Yat‐Sen University Guangzhou China
| | - Lin Yao
- Research Institute of Acupuncture and Moxibustion Shandong University of Traditional Chinese Medicine Jinan China
| | - Rongbiao Pi
- School of Medicine Sun Yat‐Sen University Guangzhou China
- International Joint Laboratory<SYSU‐PolyU HK> of Novel Anti‐Dementia Drugs of Guangzhou Guangzhou China
- Guangdong Province Key Laboratory of Brain Function and Disease Sun Yat‐sen University Guangzhou China
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Wang K, Lu Y, Morrow DF, Xiao D, Xu C. Associations of ARHGAP26 Polymorphisms with Alzheimer's Disease and Cardiovascular Disease. J Mol Neurosci 2022; 72:1085-1097. [PMID: 35171450 DOI: 10.1007/s12031-022-01972-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/10/2022] [Indexed: 02/03/2023]
Abstract
The Rho GTPase activating protein 26 (ARHGAP26) gene has been reported to be associated with neuropsychiatric diseases and neurodegenerative diseases including Parkinson's disease. We examined whether the ARHGAP26 gene is associated with Alzheimer's disease (AD) and/or cardiovascular disease (CVD). Multivariable logistic regression model was used to examine the associations of 154 single nucleotide polymorphisms (SNPs) within the ARHGAP26 gene with AD and CVD using the Alzheimer's Disease Neuroimaging Initiative 1 (ADNI-1) cohort. Fourteen SNPs were associated with AD (top SNP rs3776362 with p = 3.43 × 10-3), while 37 SNPs revealed associations with CVD (top SNP rs415235 with p = 2.06 × 10-4). Interestingly, 13 SNPs were associated with both AD and CVD. SNP rs3776362 was associated with CVD, Functional Activities Questionnaire (FAQ), and Clinical Dementia Rating Sum of Boxes (CDR-SB). A replication study using a Caribbean Hispanics sample showed that 17 SNPs revealed associations with AD, and 12 SNPs were associated with CVD. The third sample using a family-based study design showed that 9 SNPs were associated with AD, and 3 SNPs were associated with CVD. SNP rs6836509 within the ARHGAP10 gene (an important paralogon of ARHGAP26) was associated with AD and cerebrospinal fluid total tau (t-tau) level in the ADNI sample. Several SNPs were functionally important using the RegulomeDB, while a number of SNPs were associated with significant expression quantitative trait loci (eQTLs) using Genotype-Tissue Expression (GTEx) databases. In conclusion, genetic variants within ARHGAP26 were associated with AD and CVD. These findings add important new insights into the potentially shared pathogenesis of AD and CVD.
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Affiliation(s)
- Kesheng Wang
- Department of Family and Community Health, School of Nursing, Health Sciences Center, West Virginia University, Post Office Box 9600 - Office 6419, Morgantown, WV, 26506, USA.
| | - Yongke Lu
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, 25755, USA
| | - Deana F Morrow
- School of Social Work, West Virginia University, Morgantown, WV, 26506, USA
| | - Danqing Xiao
- Department of STEM, School of Arts and Sciences, Regis College, Weston, MA, 02493, USA
- McLean Imaging Center, McLean Hospital, MA, 02478, Belmont, USA
| | - Chun Xu
- Department of Health and Biomedical Sciences, College of Health Professions, University of Texas Rio Grande Valley, TX, 78520, Brownsville, USA.
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Khan AH, Lee LK, Smith DJ. Single-cell analysis of gene expression in the substantia nigra pars compacta of a pesticide-induced mouse model of Parkinson's disease. Transl Neurosci 2022; 13:255-269. [PMID: 36117858 PMCID: PMC9438968 DOI: 10.1515/tnsci-2022-0237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/18/2022] [Accepted: 07/25/2022] [Indexed: 12/02/2022] Open
Abstract
Exposure to pesticides in humans increases the risk of Parkinson’s disease (PD), but the mechanisms remain poorly understood. To elucidate these pathways, we dosed C57BL/6J mice with a combination of the pesticides maneb and paraquat. Behavioral analysis revealed motor deficits consistent with PD. Single-cell RNA sequencing of substantia nigra pars compacta revealed both cell-type-specific genes and genes expressed differentially between pesticide and control, including Fam241b, Emx2os, Bivm, Gm1439, Prdm15, and Rai2. Neurons had the largest number of significant differentially expressed genes, but comparable numbers were found in astrocytes and less so in oligodendrocytes. In addition, network analysis revealed enrichment in functions related to the extracellular matrix. These findings emphasize the importance of support cells in pesticide-induced PD and refocus our attention away from neurons as the sole agent of this disorder.
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Affiliation(s)
- Arshad H. Khan
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Box 951735, 23-151 A CHS, Los Angeles, CA 90095-1735, United States of America
| | - Lydia K. Lee
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095-6928, United States of America
| | - Desmond J. Smith
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Box 951735, 23-151 A CHS, Los Angeles, CA 90095-1735, United States of America
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Xu J, Wen J, Fu L, Liao L, Zou Y, Zhang J, Deng J, Zhang H, Liu J, Wang X, Zuo D, Guo J. Macrophage-specific RhoA knockout delays Wallerian degeneration after peripheral nerve injury in mice. J Neuroinflammation 2021; 18:234. [PMID: 34654444 PMCID: PMC8520251 DOI: 10.1186/s12974-021-02292-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 10/07/2021] [Indexed: 12/20/2022] Open
Abstract
Background Plenty of macrophages are recruited to the injured nerve to play key roles in the immunoreaction and engulf the debris of degenerated axons and myelin during Wallerian degeneration, thus creating a conducive microenvironment for nerve regeneration. Recently, drugs targeting the RhoA pathway have been widely used to promote peripheral axonal regeneration. However, the role of RhoA in macrophage during Wallerian degeneration and nerve regeneration after peripheral nerve injury is still unknown. Herein, we come up with the hypothesis that RhoA might influence Wallerian degeneration and nerve regeneration by affecting the migration and phagocytosis of macrophages after peripheral nerve injury. Methods Immunohistochemistry, Western blotting, H&E staining, and electrophysiology were performed to access the Wallerian degeneration and axonal regeneration after sciatic nerve transection and crush injury in the LyzCre+/−; RhoAflox/flox (cKO) mice or Lyz2Cre+/− (Cre) mice, regardless of sex. Macrophages’ migration and phagocytosis were detected in the injured nerves and the cultured macrophages. Moreover, the expression and potential roles of ROCK and MLCK were also evaluated in the cultured macrophages. Results 1. RhoA was specifically knocked out in macrophages of the cKO mice; 2. The segmentation of axons and myelin, the axonal regeneration, and nerve conduction in the injured nerve were significantly impeded while the myoatrophy was more severe in the cKO mice compared with those in Cre mice; 3. RhoA knockout attenuated the migration and phagocytosis of macrophages in vivo and in vitro; 4. ROCK and MLCK were downregulated in the cKO macrophages while inhibition of ROCK and MLCK could weaken the migration and phagocytosis of macrophages. Conclusions Our findings suggest that RhoA depletion in macrophages exerts a detrimental effect on Wallerian degeneration and nerve regeneration, which is most likely due to the impaired migration and phagocytosis of macrophages resulted from disrupted RhoA/ROCK/MLCK pathway. Since previous research has proved RhoA inhibition in neurons was favoring for axonal regeneration, the present study reminds us of that the cellular specificity of RhoA-targeted drugs is needed to be considered in the future application for treating peripheral nerve injury.
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Affiliation(s)
- Jiawei Xu
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Jinkun Wen
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Department of Neurology, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-Sen University, Jiangmen, 529030, China
| | - Lanya Fu
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Liqiang Liao
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China
| | - Ying Zou
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Jiaqi Zhang
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Junyao Deng
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Haowen Zhang
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Jingmin Liu
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Xianghai Wang
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China.,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, 510700, China
| | - Daming Zuo
- Department of Medical Laboratory, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Jiasong Guo
- Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou Ave North 1838, Guangzhou, 510515, China. .,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou, 510515, China. .,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, 510700, China. .,Department of Spine Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China. .,Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Guangzhou, 510515, China.
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