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Ke C, Huang B, Xiang J, Liang J, Wu G, Qiu M, Cheng K, Mao L, Lei W, Hu Y, Tang X, Tian Y, Chen G, Luo OJ, Zhang H. Secreted clusterin inhibits tumorigenesis by modulating tumor cells and macrophages in human meningioma. Neuro Oncol 2024; 26:1262-1279. [PMID: 38416702 PMCID: PMC11226886 DOI: 10.1093/neuonc/noae034] [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: 07/28/2023] [Indexed: 03/01/2024] Open
Abstract
BACKGROUND Meningioma is the most common primary intracranial tumor with a high frequency of postoperative recurrence, yet the biology of the meningioma malignancy process is still obscure. METHODS To identify potential therapeutic targets and tumor suppressors, we performed single-cell transcriptome analysis through meningioma malignancy, which included 18 samples spanning normal meninges, benign and high-grade in situ tumors, and lung metastases, for extensive transcriptome characterization. Tumor suppressor candidate gene and molecular mechanism were functionally validated at the animal model and cellular levels. RESULTS Comprehensive analysis and validation in mice and clinical cohorts indicated clusterin (CLU) had suppressive function for meningioma tumorigenesis and malignancy by inducing mitochondria damage and triggering type 1 interferon pathway dependent on its secreted isoform, and the inhibition effect was enhanced by TNFα as TNFα also induced type 1 interferon pathway. Meanwhile, both intra- and extracellular CLU overexpression enhanced macrophage polarization towards M1 phenotype and TNFα production, thus promoting tumor killing and phagocytosis. CONCLUSIONS CLU might be a key brake of meningioma malignance by synchronously modulating tumor cells and their microenvironment. Our work provides comprehensive insights into meningioma malignancy and a potential therapeutic strategy.
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Affiliation(s)
- Chao Ke
- Department of Neurosurgery, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Boya Huang
- Department of Systems Biomedical Sciences, Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Jian Xiang
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Jinlian Liang
- Department of Biophysics and Biochemistry, School of Life Sciences, Guangzhou University, Guangzhou, Guangdong, China
| | - Guangjie Wu
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Minghui Qiu
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Kai Cheng
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
| | - Lipeng Mao
- Department of Systems Biomedical Sciences, Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Wen Lei
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Yang Hu
- NHC Key Laboratory of Male Reproduction and Genetics, Guangdong Provincial Reproductive Science Institute, Guangdong Provincial Fertility Hospital, Guangzhou, China
| | - Xiaogen Tang
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Yizhen Tian
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Guobing Chen
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Oscar Junhong Luo
- Department of Systems Biomedical Sciences, Institute of Geriatric Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Hongyi Zhang
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
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NamKoong C, Kim B, Yu JH, Youn BS, Kim H, Kim E, Gil SY, Kang GM, Lee CH, Kim YB, Park KH, Kim MS, Kwon O. Stomach clusterin as a gut-derived feeding regulator. BMB Rep 2024; 57:149-154. [PMID: 37817436 PMCID: PMC10979347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/16/2023] [Accepted: 09/25/2023] [Indexed: 10/12/2023] Open
Abstract
The stomach has emerged as a crucial endocrine organ in the regulation of feeding since the discovery of ghrelin. Gut-derived hormones, such as ghrelin and cholecystokinin, can act through the vagus nerve. We previously reported the satiety effect of hypothalamic clusterin, but the impact of peripheral clusterin remains unknown. In this study, we administered clusterin intraperitoneally to mice and observed its ability to suppress fasting-driven food intake. Interestingly, we found its synergism with cholecystokinin and antagonism with ghrelin. These effects were accompanied by increased c-fos immunoreactivity in nucleus tractus solitarius, area postrema, and hypothalamic paraventricular nucleus. Notably, truncal vagotomy abolished this response. The stomach expressed clusterin at high levels among the organs, and gastric clusterin was detected in specific enteroendocrine cells and the submucosal plexus. Gastric clusterin expression decreased after fasting but recovered after 2 hours of refeeding. Furthermore, we confirmed that stomachspecific overexpression of clusterin reduced food intake after overnight fasting. These results suggest that gastric clusterin may function as a gut-derived peptide involved in the regulation of feeding through the gut-brain axis. [BMB Reports 2024; 57(3): 149-154].
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Affiliation(s)
- Cherl NamKoong
- Appetite Regulation Laboratory, Asan Institute for Life Science, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Bohye Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 03080, Korea
- Genomic Medicine Institute, Medical Research Center, Seoul National University, Seoul 03080, Korea
| | - Ji Hee Yu
- Division of Endocrinology and Metabolism, Diabetes Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Byung Soo Youn
- Osteoneurogen, Inc., Seoul 08501, Korea, Chuncheon 24341, Korea
| | - Hanbin Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Evonne Kim
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 03080, Korea
| | - So Young Gil
- Appetite Regulation Laboratory, Asan Institute for Life Science, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Gil Myoung Kang
- Appetite Regulation Laboratory, Asan Institute for Life Science, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Chan Hee Lee
- Appetite Regulation Laboratory, Asan Institute for Life Science, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA, Chuncheon 24341, Korea
| | - Kyeong-Han Park
- Department of Anatomy and Cell Biology, Kangwon National University College of Medicine, Chuncheon 24341, Korea
| | - Min-Seon Kim
- Appetite Regulation Laboratory, Asan Institute for Life Science, University of Ulsan College of Medicine, Seoul 05505, Korea
- Division of Endocrinology and Metabolism, Diabetes Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Obin Kwon
- Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 03080, Korea
- Genomic Medicine Institute, Medical Research Center, Seoul National University, Seoul 03080, Korea
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Nurcombe ZW, Hehr CL, McFarlane S. Plexina4 and cell survival in the developing zebrafish hindbrain. Dev Dyn 2023; 252:1323-1337. [PMID: 37283310 DOI: 10.1002/dvdy.633] [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: 11/20/2022] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 06/08/2023] Open
Abstract
BACKGROUND Growth factors are important in the developing and mature nervous system to support the survival of neurons. Developmental signaling molecules are known for their roles in controlling neurogenesis and neural circuit formation. Whether or not these molecules also have roles in cell survival in the developing nervous system is poorly understood. Plexins are a family of transmembrane receptors that bind Semaphorin ligands and are known to function in the guidance of developing axons and blood vessels. RESULTS In embryonic zebrafish, plexina4 is expressed widely in the brain, becoming largely restricted to the hindbrain as neurogenesis and differentiation proceed. Apoptosis is increased in the embryonic hindbrain of a plexina4ca307/ca307 CRISPR mutant. Based on the literature, we tested the secreted heat shock protein, Clusterin, as a candidate ligand to mediate cell survival through Plexina4. clusterin is expressed by the floor plate of the embryonic zebrafish hindbrain, in proximity to plexina4-expressing hindbrain cells. Morpholino-mediated knockdown of Clusterin increases cell apoptosis in the hindbrain, with additional cell death observed in epistasis experiments where Clusterin is knocked down in a plexina4 mutant background. CONCLUSIONS Our data suggest that Plexina4 promotes cell survival in the developing zebrafish hindbrain, likely through a pathway independent of Clusterin.
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Affiliation(s)
- Zachary W Nurcombe
- Department Cell Biology and Anatomy, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Graduate Program in Neuroscience, University of Calgary, Calgary, Alberta, Canada
| | - Carrie Lynn Hehr
- Department Cell Biology and Anatomy, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Sarah McFarlane
- Department Cell Biology and Anatomy, Hotchkiss Brain Institute, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
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Jun YK, Yoon HT, Kwon SH, Jo UH, Kim JE, Han YM, Kim MS, Im JP, Lee DH, Kim JS, Koh SJ, Park H. Regulation of psoriasis, colitis, and the intestinal microbiota by clusterin. Sci Rep 2023; 13:15405. [PMID: 37717073 PMCID: PMC10505212 DOI: 10.1038/s41598-023-42019-y] [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: 03/16/2023] [Accepted: 09/04/2023] [Indexed: 09/18/2023] Open
Abstract
Psoriasis, a chronic and systemic inflammatory disorder characterized by activation of the interleukin (IL)-23/IL-17 axis, may be associated with the intestinal microbiota through the so-called "gut-skin axis." Clusterin is a glycoprotein ubiquitously distributed in mammalian tissues; however, its role in psoriasis is unclear. Therefore, we evaluated the role of clusterin in psoriatic skin inflammation, systemic inflammation, and colitis using a murine model of IMQ-induced psoriasis. In IMQ-treated clusterin-knockout (clusterin-/-) mice, the expressions of inflammatory cytokines in clusterin-silenced human keratinocytes and intestinal microbial composition were analyzed. We also examined clusterin expression in the skin tissues of patients with psoriasis. IMQ-induced psoriatic skin inflammation is suppressed in clusterin-/- mice. Long-term administration of IMQ induced systemic inflammation and colitis; however, both were alleviated by the genetic deletion of clusterin. Genetic silencing of clusterin in human keratinocytes inhibited the production of inflammatory cytokines involved in the initiation and progression of psoriasis. The composition of the intestinal microbiota in IMQ-treated clusterin-/- and wild-type mice was different. Genetic deletion of clusterin suppressed the increase in the Firmicutes/Bacteroidetes (F/B) ratio. Skin tissues of patients with psoriasis showed high clusterin expression. In conclusion, inhibition of clusterin decreased psoriatic skin inflammation, systemic inflammation, colitis, and altered the F/B ratio in an IMQ-induced murine psoriasis model.
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Affiliation(s)
- Yu Kyung Jun
- Division of Gastroenterology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea
| | - Hee Tae Yoon
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea
| | - So Hyun Kwon
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea
| | - Ui Hyeon Jo
- Department of Dermatology, SMG-SNU Boramae Medical Center, Seoul, Korea
| | - Ji Eun Kim
- Department of Pathology, SMG-SNU Boramae Medical Center, Seoul, Korea
| | - Yoo Min Han
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine and Healthcare Research Institute, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea
| | - Min-Seon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea
| | - Jong Pil Im
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea
| | - Dong Ho Lee
- Division of Gastroenterology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Joo Sung Kim
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea
| | - Seong-Joon Koh
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea.
| | - Hyunsun Park
- Laboratory of Intestinal Mucosa and Skin Immunology, Liver Research Institute and Seoul National University College of Medicine, Seoul, Korea.
- Department of Dermatology, SMG-SNU Boramae Medical Center, Seoul, Korea.
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea.
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Arbeev KG, Ukraintseva S, Bagley O, Duan H, Wu D, Akushevich I, Stallard E, Kulminski A, Christensen K, Feitosa MF, O’Connell JR, Parker D, Whitson H, Yashin AI. Interactions between genes involved in physiological dysregulation and axon guidance: role in Alzheimer's disease. Front Genet 2023; 14:1236509. [PMID: 37719713 PMCID: PMC10500346 DOI: 10.3389/fgene.2023.1236509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/17/2023] [Indexed: 09/19/2023] Open
Abstract
Dysregulation of physiological processes may contribute to Alzheimer's disease (AD) development. We previously found that an increase in the level of physiological dysregulation (PD) in the aging body is associated with declining resilience and robustness to major diseases. Also, our genome-wide association study found that genes associated with the age-related increase in PD frequently represented pathways implicated in axon guidance and synaptic function, which in turn were linked to AD and related traits (e.g., amyloid, tau, neurodegeneration) in the literature. Here, we tested the hypothesis that genes involved in PD and axon guidance/synapse function may jointly influence onset of AD. We assessed the impact of interactions between SNPs in such genes on AD onset in the Long Life Family Study and sought to replicate the findings in the Health and Retirement Study. We found significant interactions between SNPs in the UNC5C and CNTN6, and PLXNA4 and EPHB2 genes that influenced AD onset in both datasets. Associations with individual SNPs were not statistically significant. Our findings, thus, support a major role of genetic interactions in the heterogeneity of AD and suggest the joint contribution of genes involved in PD and axon guidance/synapse function (essential for the maintenance of complex neural networks) to AD development.
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Affiliation(s)
- Konstantin G. Arbeev
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Svetlana Ukraintseva
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Olivia Bagley
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Hongzhe Duan
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Deqing Wu
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Igor Akushevich
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Eric Stallard
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Alexander Kulminski
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
| | - Kaare Christensen
- Danish Aging Research Center, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Mary F. Feitosa
- Division of Statistical Genomics, Department of Genetics, Washington University School of Medicine, St. Louis, MO, United States
| | - Jeffrey R. O’Connell
- Division of Endocrinology, Diabetes and Nutrition and Program for Personalized and Genomic Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Daniel Parker
- Duke Center for the Study of Aging and Human Development, Duke University, Durham, NC, United States
| | - Heather Whitson
- Duke Center for the Study of Aging and Human Development, Duke University, Durham, NC, United States
- Durham VA Geriatrics Research Education and Clinical Center, Durham, NC, United States
| | - Anatoliy I. Yashin
- Biodemography of Aging Research Unit, Social Science Research Institute, Duke University, Durham, NC, United States
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Kovács P, Pushparaj PN, Takács R, Mobasheri A, Matta C. The clusterin connectome: Emerging players in chondrocyte biology and putative exploratory biomarkers of osteoarthritis. Front Immunol 2023; 14:1103097. [PMID: 37033956 PMCID: PMC10081159 DOI: 10.3389/fimmu.2023.1103097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 02/23/2023] [Indexed: 03/17/2023] Open
Abstract
IntroductionClusterin is amoonlighting protein that hasmany functions. It is amultifunctional Q6 holdase chaperone glycoprotein that is present intracellularly and extracellularly in almost all bodily fluids. Clusterin is involved in lipid transport, cell differentiation, regulation of apoptosis, and clearance of cellular debris, and plays a protective role in ensuring cellular survival. However, the possible involvement of clusterin in arthritic disease remains unclear. Given the significant potential of clusterin as a biomarker of osteoarthritis (OA), a more detailed analysis of its complex network in an inflammatory environment, specifically in the context of OA, is required. Based on the molecular network of clusterin, this study aimed to identify interacting partners that could be developed into biomarker panels for OA.MethodsThe STRING database and Cytoscape were used to map and visualize the clusterin connectome. The Qiagen Ingenuity Pathway Analysis (IPA) software was used to analyze and study clusterinassociated signaling networks in OA. We also analyzed transcription factors known to modulate clusterin expression, which may be altered in OA.ResultsThe top hits in the clusterin network were intracellular chaperones, aggregate-forming proteins, apoptosis regulators and complement proteins. Using a text-mining approach in Cytoscape, we identified additional interacting partners, including serum proteins, apolipoproteins, and heat shock proteins.DiscussionBased on known interactions with proteins, we predicted potential novel components of the clusterin connectome in OA, including selenoprotein R, semaphorins, and meprins, which may be important for designing new prognostic or diagnostic biomarker panels.
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Affiliation(s)
- Patrik Kovács
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Peter Natesan Pushparaj
- Center of Excellence in Genomic Medicine Research (CEGMR), Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Center for Transdisciplinary Research, Department of Pharmacology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, India
| | - Roland Takács
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Ali Mobasheri
- FibroHealth Interdisciplinary Research Programme, Fibrobesity Cluster, Research Unit of Health Sciences and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
- Department of Regenerative Medicine, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
- World Health Organization Collaborating Center for Public Health Aspects of Musculoskeletal Health and Aging, Université de Liège, Liège, Belgium
- *Correspondence: Csaba Matta, ; Ali Mobasheri,
| | - Csaba Matta
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- *Correspondence: Csaba Matta, ; Ali Mobasheri,
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Wilson MR, Satapathy S, Vendruscolo M. Extracellular protein homeostasis in neurodegenerative diseases. Nat Rev Neurol 2023; 19:235-245. [PMID: 36828943 DOI: 10.1038/s41582-023-00786-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2023] [Indexed: 02/26/2023]
Abstract
The protein homeostasis (proteostasis) system encompasses the cellular processes that regulate protein synthesis, folding, concentration, trafficking and degradation. In the case of intracellular proteostasis, the identity and nature of these processes have been extensively studied and are relatively well known. By contrast, the mechanisms of extracellular proteostasis are yet to be fully elucidated, although evidence is accumulating that their age-related progressive impairment might contribute to neuronal death in neurodegenerative diseases. Constitutively secreted extracellular chaperones are emerging as key players in processes that operate to protect neurons and other brain cells by neutralizing the toxicity of extracellular protein aggregates and promoting their safe clearance and disposal. Growing evidence indicates that these extracellular chaperones exert multiple effects to promote cell viability and protect neurons against pathologies arising from the misfolding and aggregation of proteins in the synaptic space and interstitial fluid. In this Review, we outline the current knowledge of the mechanisms of extracellular proteostasis linked to neurodegenerative diseases, and we examine the latest understanding of key molecules and processes that protect the brain from the pathological consequences of extracellular protein aggregation and proteotoxicity. Finally, we contemplate possible therapeutic opportunities for neurodegenerative diseases on the basis of this emerging knowledge.
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Affiliation(s)
- Mark R Wilson
- School of Chemistry and Molecular Bioscience, Molecular Horizons Research Institute, University of Wollongong, Wollongong, New South Wales, Australia.
| | - Sandeep Satapathy
- Blavatnik Institute of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Michele Vendruscolo
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
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8
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Yuste-Checa P, Bracher A, Hartl FU. The chaperone Clusterin in neurodegeneration-friend or foe? Bioessays 2022; 44:e2100287. [PMID: 35521968 DOI: 10.1002/bies.202100287] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 04/15/2022] [Accepted: 04/20/2022] [Indexed: 12/30/2022]
Abstract
Fibrillar protein aggregates are the pathological hallmark of a group of age-dependent neurodegenerative conditions, including Alzheimer's and Parkinson's disease. Aggregates of the microtubule-associated protein Tau are observed in Alzheimer's disease and primary tauopathies. Tau pathology propagates from cell to cell in a prion-like process that is likely subject to modulation by extracellular chaperones such as Clusterin. We recently reported that Clusterin delayed Tau fibril formation but enhanced the activity of Tau oligomers to seed aggregation of endogenous Tau in a cellular model. In contrast, Clusterin inhibited the propagation of α-Synuclein aggregates associated with Parkinson's disease. These findings raise the possibility of a mechanistic link between Clusterin upregulation observed in Alzheimer's disease and the progression of Tau pathology. Here we review the diverse functions of Clusterin in the pathogenesis of neurodegenerative diseases, focusing on evidence that Clusterin may act either as a suppressor or enhancer of pathology.
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Affiliation(s)
- Patricia Yuste-Checa
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, Maryland, USA
| | - Andreas Bracher
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - F Ulrich Hartl
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, Maryland, USA
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9
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Rabaneda-Bueno R, Mena-Montes B, Torres-Castro S, Torres-Carrillo N, Torres-Carrillo NM. Advances in Genetics and Epigenetic Alterations in Alzheimer's Disease: A Notion for Therapeutic Treatment. Genes (Basel) 2021; 12:1959. [PMID: 34946908 PMCID: PMC8700838 DOI: 10.3390/genes12121959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 12/18/2022] Open
Abstract
Alzheimer's disease (AD) is a disabling neurodegenerative disorder that leads to long-term functional and cognitive impairment and greatly reduces life expectancy. Early genetic studies focused on tracking variations in genome-wide DNA sequences discovered several polymorphisms and novel susceptibility genes associated with AD. However, despite the numerous risk factors already identified, there is still no fully satisfactory explanation for the mechanisms underlying the onset of the disease. Also, as with other complex human diseases, the causes of low heritability are unclear. Epigenetic mechanisms, in which changes in gene expression do not depend on changes in genotype, have attracted considerable attention in recent years and are key to understanding the processes that influence age-related changes and various neurological diseases. With the recent use of massive sequencing techniques, methods for studying epigenome variations in AD have also evolved tremendously, allowing the discovery of differentially expressed disease traits under different conditions and experimental settings. This is important for understanding disease development and for unlocking new potential AD therapies. In this work, we outline the genomic and epigenomic components involved in the initiation and development of AD and identify potentially effective therapeutic targets for disease control.
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Affiliation(s)
- Rubén Rabaneda-Bueno
- Biology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, 37005 České Budějovice, Czech Republic
- School of Biological Sciences, James Clerk Maxwell Building, The King’s Buildings Campus, University of Edinburgh, Edinburgh EH9 3FD, UK
| | - Beatriz Mena-Montes
- Laboratorio de Biología del Envejecimiento, Departamento de Investigación Básica, Instituto Nacional de Geriatría, Mexico City 10200, Mexico;
| | - Sara Torres-Castro
- Departamento de Epidemiología Demográfica y Determinantes Sociales, Instituto Nacional de Geriatría, Mexico City 10200, Mexico;
| | - Norma Torres-Carrillo
- Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Jalisco, Mexico; (N.T.-C.); (N.M.T.-C.)
| | - Nora Magdalena Torres-Carrillo
- Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Jalisco, Mexico; (N.T.-C.); (N.M.T.-C.)
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10
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Poggio P, Sorge M, Seclì L, Brancaccio M. Extracellular HSP90 Machineries Build Tumor Microenvironment and Boost Cancer Progression. Front Cell Dev Biol 2021; 9:735529. [PMID: 34722515 PMCID: PMC8551675 DOI: 10.3389/fcell.2021.735529] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 09/20/2021] [Indexed: 12/21/2022] Open
Abstract
HSP90 is released by cancer cells in the tumor microenvironment where it associates with different co-chaperones generating complexes with specific functions, ranging from folding and activation of extracellular clients to the stimulation of cell surface receptors. Emerging data indicate that these functions are essential for tumor growth and progression. The understanding of the exact composition of extracellular HSP90 complexes and the molecular mechanisms at the basis of their functions in the tumor microenvironment may represent the first step to design innovative diagnostic tools and new effective therapies. Here we review the impact of extracellular HSP90 complexes on cancer cell signaling and behavior.
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Affiliation(s)
- Pietro Poggio
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Matteo Sorge
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Laura Seclì
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Mara Brancaccio
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
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Chung S, Yang J, Kim HJ, Hwang EM, Lee W, Suh K, Choi H, Mook-Jung I. Plexin-A4 mediates amyloid-β-induced tau pathology in Alzheimer's disease animal model. Prog Neurobiol 2021; 203:102075. [PMID: 34004220 DOI: 10.1016/j.pneurobio.2021.102075] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 03/09/2021] [Accepted: 05/11/2021] [Indexed: 11/17/2022]
Abstract
Amyloid-β (Aβ) and tau are major pathological hallmarks of Alzheimer's disease (AD). Several studies have revealed that Aβ accelerates pathological tau transition and spreading during the disease progression, and that reducing tau can mitigate pathological features of AD. However, molecular links between Aβ and tau pathologies remain elusive. Here, we suggest a novel role for the plexin-A4 as an Aβ receptor that induces aggregated tau pathology. Plexin-A4, previously known as proteins involved in regulating axon guidance and synaptic plasticity, can bound to Aβ with co-receptor, neuropilin-2. Genetic downregulation of plexin-A4 in neurons was sufficient to prevent Aβ-induced activation of CDK5 and reduce tau hyperphosphorylation and aggregation, even in the presence of Aβ. In an AD mouse model that manifests both Aβ and tau pathologies, genetic downregulation of plexin-A4 in the hippocampus reduced tau pathology and ameliorated spatial memory impairment. Collectively, these results indicate that the plexin-A4 is capable of mediating Aβ-induced tau pathology in AD pathogenesis.
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Affiliation(s)
- Sunwoo Chung
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; SNU Dementia Research Center, Seoul National University College of Medicine, Seoul 03080, South Korea.
| | - Jinhee Yang
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; Biorchestra Co., Ltd., Techno 4-ro 17, Daejeon 34013, South Korea.
| | - Haeng Jun Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; SNU Dementia Research Center, Seoul National University College of Medicine, Seoul 03080, South Korea.
| | - Eun Mi Hwang
- Center for Functional Connectomics, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea.
| | - Wonik Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; SNU Dementia Research Center, Seoul National University College of Medicine, Seoul 03080, South Korea.
| | - Kyujin Suh
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; SNU Dementia Research Center, Seoul National University College of Medicine, Seoul 03080, South Korea.
| | - Hayoung Choi
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; SNU Dementia Research Center, Seoul National University College of Medicine, Seoul 03080, South Korea.
| | - Inhee Mook-Jung
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, South Korea; SNU Dementia Research Center, Seoul National University College of Medicine, Seoul 03080, South Korea.
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12
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Satapathy S, Wilson MR. The Dual Roles of Clusterin in Extracellular and Intracellular Proteostasis. Trends Biochem Sci 2021; 46:652-660. [PMID: 33573881 DOI: 10.1016/j.tibs.2021.01.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/04/2021] [Accepted: 01/19/2021] [Indexed: 02/06/2023]
Abstract
Clusterin (CLU) was the first reported secreted mammalian chaperone and impacts on serious diseases associated with inappropriate extracellular protein aggregation. Many studies have described intracellular CLU in locations outside the secretory system and recent work has shown that CLU can be released into the cytosol during cell stress. In this article, we critically evaluate evidence relevant to the proposed origins of cellular CLU found outside the secretory system, and advance the hypothesis that the cytosolic release of CLU induced by stress serves to facilitate the trafficking of misfolded proteins to the proteasome and autophagy for degradation. We also propose future research directions that could help establish CLU as a unique chaperone performing critical and synergic roles in both intracellular and extracellular proteostasis.
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Affiliation(s)
- Sandeep Satapathy
- School of Chemistry and Molecular Biosciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Molecular Horizons Research Institute, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
| | - Mark R Wilson
- School of Chemistry and Molecular Biosciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Molecular Horizons Research Institute, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia.
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13
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Chen F, Swartzlander DB, Ghosh A, Fryer JD, Wang B, Zheng H. Clusterin secreted from astrocyte promotes excitatory synaptic transmission and ameliorates Alzheimer's disease neuropathology. Mol Neurodegener 2021; 16:5. [PMID: 33517893 PMCID: PMC7849119 DOI: 10.1186/s13024-021-00426-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/14/2021] [Indexed: 12/15/2022] Open
Abstract
Background Genome-wide association studies have established clusterin (CLU) as a genetic modifier for late-onset Alzheimer’s disease (AD). Both protective and risk alleles have been identified which may be associated with its expression levels. However, the physiological function of clusterin in the central nervous system remains largely unknown. Methods We examined Clu expression in mouse brains by immunohistochemistry and high-resolution imaging. We performed electrophysiological recordings and morphological analysis of dendritic spines in wild-type and Clu knockout mice. We tested synaptic function of astrocytic Clu using neuron-glia co-cultures and by AAV-mediated astroglial Clu expression in vivo. Finally, we investigated the role of astrocytic Clu on synaptic properties and amyloid pathology in 5xFAD transgenic mouse model of AD. Results We show that astrocyte secreted Clu co-localizes with presynaptic puncta of excitatory neurons. Loss of Clu led to impaired presynaptic function and reduced spine density in vivo. Neurons co-cultured with Clu-overexpressing astrocytes or treated with conditioned media from HEK293 cells transfected with Clu displayed enhanced excitatory neurotransmission. AAV-mediated astroglial Clu expression promoted excitatory neurotransmission in wild-type mice and rescued synaptic deficits in Clu knockout mice. Overexpression of Clu in the astrocytes of 5xFAD mice led to reduced Aβ pathology and fully rescued the synaptic deficits. Conclusion We identify Clu as an astrocyte-derived synaptogenic and anti-amyloid factor; the combination of these activities may influence the progression of late-onset AD. Supplementary Information The online version contains supplementary material available at 10.1186/s13024-021-00426-7.
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Affiliation(s)
- Fading Chen
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA.,Present address: Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, 02142, USA
| | - Dan B Swartzlander
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Anamitra Ghosh
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA
| | - John D Fryer
- Department of Neuroscience, Mayo Clinic, Scottsdale, AZ, 85259, USA
| | - Baiping Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA. .,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
| | - Hui Zheng
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX, 77030, USA. .,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
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14
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Kim YW, Al‐Ramahi I, Koire A, Wilson SJ, Konecki DM, Mota S, Soleimani S, Botas J, Lichtarge O. Harnessing the paradoxical phenotypes of APOE ɛ2 and APOE ɛ4 to identify genetic modifiers in Alzheimer's disease. Alzheimers Dement 2020; 17:831-846. [PMID: 33576571 PMCID: PMC8247413 DOI: 10.1002/alz.12240] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/08/2020] [Accepted: 10/22/2020] [Indexed: 01/05/2023]
Abstract
The strongest genetic risk factor for idiopathic late‐onset Alzheimer's disease (LOAD) is apolipoprotein E (APOE) ɛ4, while the APOE ɛ2 allele is protective. However, there are paradoxical APOE ɛ4 carriers who remain disease‐free and APOE ɛ2 carriers with LOAD. We compared exomes of healthy APOE ɛ4 carriers and APOE ɛ2 Alzheimer's disease (AD) patients, prioritizing coding variants based on their predicted functional impact, and identified 216 genes with differential mutational load between these two populations. These candidate genes were significantly dysregulated in LOAD brains, and many modulated tau‐ or β42‐induced neurodegeneration in Drosophila. Variants in these genes were associated with AD risk, even in APOE ɛ3 homozygotes, showing robust predictive power for risk stratification. Network analyses revealed involvement of candidate genes in brain cell type‐specific pathways including synaptic biology, dendritic spine pruning and inflammation. These potential modifiers of LOAD may constitute novel biomarkers, provide potential therapeutic intervention avenues, and support applying this approach as larger whole exome sequencing cohorts become available.
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Affiliation(s)
- Young Won Kim
- Program in Integrative Molecular and Biomedical SciencesBaylor College of MedicineHoustonTexasUSA
| | - Ismael Al‐Ramahi
- Jan and Dan Duncan Neurological Research InstituteHoustonTexasUSA
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
| | - Amanda Koire
- Graduate Program in Quantitative and Computational BiosciencesBaylor College of MedicineHoustonTexasUSA
- Medical Scientist Training ProgramBaylor College of MedicineHoustonTexasUSA
| | - Stephen J. Wilson
- Biochemistry and Molecular BiologyBaylor College of MedicineHoustonTexasUSA
| | - Daniel M. Konecki
- Graduate Program in Quantitative and Computational BiosciencesBaylor College of MedicineHoustonTexasUSA
| | - Samantha Mota
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
| | - Shirin Soleimani
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
| | - Juan Botas
- Jan and Dan Duncan Neurological Research InstituteHoustonTexasUSA
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
- Graduate Program in Quantitative and Computational BiosciencesBaylor College of MedicineHoustonTexasUSA
| | - Olivier Lichtarge
- Program in Integrative Molecular and Biomedical SciencesBaylor College of MedicineHoustonTexasUSA
- Jan and Dan Duncan Neurological Research InstituteHoustonTexasUSA
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
- Graduate Program in Quantitative and Computational BiosciencesBaylor College of MedicineHoustonTexasUSA
- Medical Scientist Training ProgramBaylor College of MedicineHoustonTexasUSA
- Biochemistry and Molecular BiologyBaylor College of MedicineHoustonTexasUSA
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15
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Itakura E, Chiba M, Murata T, Matsuura A. Heparan sulfate is a clearance receptor for aberrant extracellular proteins. J Cell Biol 2020; 219:133807. [PMID: 32211892 PMCID: PMC7054991 DOI: 10.1083/jcb.201911126] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 01/13/2023] Open
Abstract
The accumulation of aberrant proteins leads to various neurodegenerative disorders. Mammalian cells contain several intracellular protein degradation systems, including autophagy and proteasomal systems, that selectively remove aberrant intracellular proteins. Although mammals contain not only intracellular but also extracellular proteins, the mechanism underlying the quality control of aberrant extracellular proteins is poorly understood. Here, using a novel quantitative fluorescence assay and genome-wide CRISPR screening, we identified the receptor-mediated degradation pathway by which misfolded extracellular proteins are selectively captured by the extracellular chaperone Clusterin and undergo endocytosis via the cell surface heparan sulfate (HS) receptor. Biochemical analyses revealed that positively charged residues on Clusterin electrostatically interact with negatively charged HS. Furthermore, the Clusterin-HS pathway facilitates the degradation of amyloid β peptide and diverse leaked cytosolic proteins in extracellular space. Our results identify a novel protein quality control system for preserving extracellular proteostasis and highlight its role in preventing diseases associated with aberrant extracellular proteins.
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Affiliation(s)
- Eisuke Itakura
- Department of Biology, Graduate School of Science and Engineering, Chiba University, Chiba, Japan
| | - Momoka Chiba
- Department of Biology, Faculty of Science, Chiba University, Chiba, Japan
| | - Takeshi Murata
- Department of Chemistry, Graduate School of Science, Chiba University, Chiba, Japan
| | - Akira Matsuura
- Department of Biology, Graduate School of Science and Engineering, Chiba University, Chiba, Japan
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16
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Foster EM, Dangla-Valls A, Lovestone S, Ribe EM, Buckley NJ. Clusterin in Alzheimer's Disease: Mechanisms, Genetics, and Lessons From Other Pathologies. Front Neurosci 2019; 13:164. [PMID: 30872998 PMCID: PMC6403191 DOI: 10.3389/fnins.2019.00164] [Citation(s) in RCA: 203] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/12/2019] [Indexed: 01/10/2023] Open
Abstract
Clusterin (CLU) or APOJ is a multifunctional glycoprotein that has been implicated in several physiological and pathological states, including Alzheimer's disease (AD). With a prominent extracellular chaperone function, additional roles have been discussed for clusterin, including lipid transport and immune modulation, and it is involved in pathways common to several diseases such as cell death and survival, oxidative stress, and proteotoxic stress. Although clusterin is normally a secreted protein, it has also been found intracellularly under certain stress conditions. Multiple hypotheses have been proposed regarding the origin of intracellular clusterin, including specific biogenic processes leading to alternative transcripts and protein isoforms, but these lines of research are incomplete and contradictory. Current consensus is that intracellular clusterin is most likely to have exited the secretory pathway at some point or to have re-entered the cell after secretion. Clusterin's relationship with amyloid beta (Aβ) has been of great interest to the AD field, including clusterin's apparent role in altering Aβ aggregation and/or clearance. Additionally, clusterin has been more recently identified as a mediator of Aβ toxicity, as evidenced by the neuroprotective effect of CLU knockdown and knockout in rodent and human iPSC-derived neurons. CLU is also the third most significant genetic risk factor for late onset AD and several variants have been identified in CLU. Although the exact contribution of these variants to altered AD risk is unclear, some have been linked to altered CLU expression at both mRNA and protein levels, altered cognitive and memory function, and altered brain structure. The apparent complexity of clusterin's biogenesis, the lack of clarity over the origin of the intracellular clusterin species, and the number of pathophysiological functions attributed to clusterin have all contributed to the challenge of understanding the role of clusterin in AD pathophysiology. Here, we highlight clusterin's relevance to AD by discussing the evidence linking clusterin to AD, as well as drawing parallels on how the role of clusterin in other diseases and pathways may help us understand its biological function(s) in association with AD.
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Affiliation(s)
| | | | | | | | - Noel J. Buckley
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom
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17
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Han Q, Sun YA, Zong Y, Chen C, Wang HF, Tan L. Common Variants in PLXNA4 and Correlation to CSF-related Phenotypes in Alzheimer's Disease. Front Neurosci 2018; 12:946. [PMID: 30618575 PMCID: PMC6305543 DOI: 10.3389/fnins.2018.00946] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 11/29/2018] [Indexed: 01/21/2023] Open
Abstract
The Plexin-A 4 (PLXNA4) gene, has recently been identified in genome wide association studies (GWAS), as a novel genetic player associated with Alzheimer's disease (AD). Additionally, PLXNA4 genetic variations were also found to increase AD risk by tau pathology in vitro. However, the potential roles of PLXNA4 variants in the amyloid-β (Aβ) pathology, were not evaluated. Five targeted loci capturing the top common variations in PLXNA4, were extracted using tagger methods. Multiple linear regression models were used to explore whether these variations can affect the cerebrospinal fluid (CSF) (Aβ1−42, T-tau, and P-tau) phenotypes in the Alzheimer's disease Neuroimaging Initiative (ADNI) dataset. We detected that two loci (rs6467431, rs67468325) were significantly associated with CSF Aβ1−42 levels in the hybrid population (rs6467431: P = 0.01376, rs67468325: P = 0.006536) and the significance remained after false discovery rate (FDR) correction (rs6467431: Pc = 0.03441, rs67468325: Pc = 0.03268). In the subgroup analysis, we further confirmed the association of rs6467431 in the cognitively normal (CN) subgroup (P = 0.01904, Pc = 0.04761). Furthermore, rs6467431-A carriers and rs67468325-G carriers showed higher CSF Aβ1−42 levels than non-carriers. Nevertheless, we did not detect any significant relationships between the levels of T-tau, P-tau and these PLXNA4 loci. Our findings provided preliminary evidence that PLXNA4 variants can confer AD risk through modulating the Aβ deposition.
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Affiliation(s)
- Qiu Han
- Department of Neurology, Qingdao Clinical Medical School, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China.,Department of Neurology, The Affiliated Huaian Hosipital of Xuzhou Medical University, Huai'an, China
| | - Yong-An Sun
- Department of Neurology, Qingdao Clinical Medical School, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China.,Department of Neurology, First Affiliated Hospital of Kangda School, Nanjing Medical University, Lianyungang, China
| | - Yu Zong
- Department of Neurology, School of Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Chun Chen
- Department of Neurology, Qingdao Clinical Medical School, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China.,Department of Neurology, Hongze Huai'an District People's Hospital, Huai'an, China
| | - Hui-Fu Wang
- Department of Neurology, School of Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Lan Tan
- Department of Neurology, Qingdao Clinical Medical School, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
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18
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Boyce G, Button E, Soo S, Wellington C. The pleiotropic vasoprotective functions of high density lipoproteins (HDL). J Biomed Res 2017; 32:164. [PMID: 28550271 PMCID: PMC6265396 DOI: 10.7555/jbr.31.20160103] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 12/23/2016] [Indexed: 12/19/2022] Open
Abstract
The pleiotropic functions of circulating high density lipoprotein (HDL) on peripheral vascular health are well established. HDL plays a pivotal role in reverse cholesterol transport and is also known to suppress inflammation, endothelial activation and apoptosis in peripheral vessels. Although not expressed in the central nervous system, HDL has nevertheless emerged as a potential resilience factor for dementia in multiple epidemiological studies. Animal model data specifically support a role for HDL in attenuating the accumulation of β-amyloid within cerebral vessels concomitant with reduced neuroinflammation and improved cognitive performance. As the vascular contributions to dementia are increasingly appreciated, this review seeks to summarize recent literature focused on the vasoprotective properties of HDL that may extend to cerebral vessels, discuss potential roles of HDL in dementia relative to brain-derived lipoproteins, identify gaps in current knowledge, and highlight new opportunities for research and discovery.
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Affiliation(s)
- Guilaine Boyce
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Emily Button
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Sonja Soo
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Cheryl Wellington
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
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19
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Pohlkamp T, Wasser CR, Herz J. Functional Roles of the Interaction of APP and Lipoprotein Receptors. Front Mol Neurosci 2017; 10:54. [PMID: 28298885 PMCID: PMC5331069 DOI: 10.3389/fnmol.2017.00054] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 02/16/2017] [Indexed: 11/24/2022] Open
Abstract
The biological fates of the key initiator of Alzheimer’s disease (AD), the amyloid precursor protein (APP), and a family of lipoprotein receptors, the low-density lipoprotein (LDL) receptor-related proteins (LRPs) and their molecular roles in the neurodegenerative disease process are inseparably interwoven. Not only does APP bind tightly to the extracellular domains (ECDs) of several members of the LRP group, their intracellular portions are also connected through scaffolds like the one established by FE65 proteins and through interactions with adaptor proteins such as X11/Mint and Dab1. Moreover, the ECDs of APP and LRPs share common ligands, most notably Reelin, a regulator of neuronal migration during embryonic development and modulator of synaptic transmission in the adult brain, and Agrin, another signaling protein which is essential for the formation and maintenance of the neuromuscular junction (NMJ) and which likely also has critical, though at this time less well defined, roles for the regulation of central synapses. Furthermore, the major independent risk factors for AD, Apolipoprotein (Apo) E and ApoJ/Clusterin, are lipoprotein ligands for LRPs. Receptors and ligands mutually influence their intracellular trafficking and thereby the functions and abilities of neurons and the blood-brain-barrier to turn over and remove the pathological product of APP, the amyloid-β peptide. This article will review and summarize the molecular mechanisms that are shared by APP and LRPs and discuss their relative contributions to AD.
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Affiliation(s)
- Theresa Pohlkamp
- Department of Molecular Genetics, UT Southwestern Medical CenterDallas, TX, USA; Center for Translational Neurodegeneration Research, UT Southwestern Medical CenterDallas, TX, USA
| | - Catherine R Wasser
- Department of Molecular Genetics, UT Southwestern Medical CenterDallas, TX, USA; Center for Translational Neurodegeneration Research, UT Southwestern Medical CenterDallas, TX, USA
| | - Joachim Herz
- Department of Molecular Genetics, UT Southwestern Medical CenterDallas, TX, USA; Center for Translational Neurodegeneration Research, UT Southwestern Medical CenterDallas, TX, USA; Department of Neuroscience, UT Southwestern Medical CenterDallas, TX, USA; Department of Neurology and Neurotherapeutics, UT Southwestern Medical CenterDallas, TX, USA
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20
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Toll-like receptor 4 signaling is required for clusterin-induced tumor necrosis factor-α secretion in macrophage. Biochem Biophys Res Commun 2017; 482:1407-1412. [DOI: 10.1016/j.bbrc.2016.12.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 12/07/2016] [Indexed: 11/17/2022]
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