1
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Casas M, Dickson EJ. Unraveling the Connection: Cholesterol, Calcium Signaling, and Neurodegeneration. Neurosci Insights 2024; 19:26331055241252772. [PMID: 38737295 PMCID: PMC11088808 DOI: 10.1177/26331055241252772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 04/19/2024] [Indexed: 05/14/2024] Open
Abstract
Cholesterol and calcium play crucial roles as integral structural components and functional signaling entities within the central nervous system. Disruption in cholesterol homeostasis has been linked to Alzheimer's, Parkinson's, and Huntington's Disease while alterations in calcium signaling is hypothesized to be a key substrate for neurodegeneration across many disorders. Despite the importance of regulated cholesterol and calcium homeostasis for brain health there has been an absence of research investigating the interdependence of these signaling molecules and how they can tune each other's abundance at membranes to influence membrane identity. Here, we discuss the role of cholesterol in shaping calcium dynamics in a neurodegenerative disorder that arises due to mutations in the lysosomal cholesterol transporter, Niemann Pick Type C1 (NPC1). We discuss the molecular mechanisms through which altered lysosomal cholesterol transport influences calcium signaling pathways through remodeling of ion channel distribution at organelle-organelle membrane contacts leading to neurodegeneration. This scientific inquiry not only sheds light on NPC disease but also holds implications for comprehending other cholesterol-associated neurodegenerative disorders.
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Affiliation(s)
- Maria Casas
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
| | - Eamonn J Dickson
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
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2
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Lee D, Hong JH. Niemann-Pick Disease Type C (NPDC) by Mutation of NPC1 and NPC2: Aberrant Lysosomal Cholesterol Trafficking and Oxidative Stress. Antioxidants (Basel) 2023; 12:2021. [PMID: 38136141 PMCID: PMC10740957 DOI: 10.3390/antiox12122021] [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: 10/24/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 12/24/2023] Open
Abstract
Cholesterol trafficking is initiated by the endocytic pathway and transported from endo/lysosomes to other intracellular organelles. Deficiencies in cholesterol-sensing and binding proteins NPC1 and NPC2 induce accumulation in lysosomes and the malfunction of trafficking to other organelles. Each organelle possesses regulatory factors to induce cholesterol trafficking. The mutation of NPC1 and NPC2 genes induces Niemann-Pick disease type C (NPDC), which is a hereditary disease and causes progressive neurodegeneration, developmental disability, hypotonia, and ataxia. Oxidative stress induces damage in NPDC-related intracellular organelles. Although studies on the relationship between NPDC and oxidation are relatively rare, several studies have reported the therapeutic potential of antioxidants in treating NPDC. Investigating antioxidant drugs to relieve oxidative stress and cholesterol accumulation is suggested to be a powerful tool for developing treatments for NPDC. Understanding NPDC provides challenging issues in understanding the oxidative stress-lysosome metabolism of the lipid axis. Thus, we elucidated the relationship between complexes of intracellular organelles and NPDC to develop our knowledge and suggested potential antioxidant reagents for NPDC therapy.
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Affiliation(s)
| | - Jeong Hee Hong
- Department of Health Sciences & Technology, GAIHST, Gachon University, 155 Getbeolro, Yeonsu-gu, Incheon 21999, Republic of Korea;
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3
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Horvath JD, Casas M, Kutchukian C, Sánchez SC, Pergande MR, Cologna SM, Simó S, Dixon RE, Dickson EJ. α-Synuclein-dependent increases in PIP5K1γ drive inositol signaling to promote neurotoxicity. Cell Rep 2023; 42:113244. [PMID: 37838947 PMCID: PMC11010634 DOI: 10.1016/j.celrep.2023.113244] [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: 01/31/2023] [Revised: 08/09/2023] [Accepted: 09/25/2023] [Indexed: 10/17/2023] Open
Abstract
Anomalous aggregation of α-synuclein (α-Syn) is a pathological hallmark of many degenerative synucleinopathies including Lewy body dementia (LBD) and Parkinson's disease (PD). Despite its strong link to disease, the precise molecular mechanisms that link α-Syn aggregation to neurodegeneration have yet to be elucidated. Here, we find that elevated α-Syn leads to an increase in the plasma membrane (PM) phosphoinositide PI(4,5)P2, which precipitates α-Syn aggregation and drives toxic increases in mitochondrial Ca2+ and reactive oxygen species leading to neuronal death. Upstream of this toxic signaling pathway is PIP5K1γ, whose abundance and localization is enhanced at the PM by α-Syn-dependent increases in ARF6. Selective inhibition of PIP5K1γ or knockout of ARF6 in neurons rescues α-Syn aggregation and cellular phenotypes of toxicity. Collectively, our data suggest that modulation of phosphoinositide metabolism may be a therapeutic target to slow neurodegeneration for PD and other related neurodegenerative disorders.
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Affiliation(s)
- Jonathan D Horvath
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA 95616, USA
| | - Maria Casas
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA 95616, USA
| | - Candice Kutchukian
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA 95616, USA
| | - Sara Creus Sánchez
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA 95616, USA
| | | | | | - Sergi Simó
- Department of Cell Biology and Human Anatomy, University of California, Davis, Davis, CA 95616, USA
| | - Rose E Dixon
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA 95616, USA
| | - Eamonn J Dickson
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA 95616, USA.
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4
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Yasuda T, Uchiyama T, Watanabe N, Ito N, Nakabayashi K, Mochizuki H, Onodera M. Peripheral immune system modulates Purkinje cell degeneration in Niemann-Pick disease type C1. Life Sci Alliance 2023; 6:e202201881. [PMID: 37369603 PMCID: PMC10300197 DOI: 10.26508/lsa.202201881] [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: 12/19/2022] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
Niemann-Pick disease type C1 (NPC1) is a fatal lysosomal storage disorder characterized by progressive neuronal degeneration. Its key pathogenic events remain largely unknown. We have, herein, found that neonatal BM-derived cell transplantation can ameliorate Purkinje cell degeneration in NPC1 mice. We subsequently addressed the impact of the peripheral immune system on the neuropathogenesis observed in NPC1 mice. The depletion of mature lymphocytes promoted NPC1 phenotypes, thereby suggesting a neuroprotective effect of lymphocytes. Moreover, the peripheral infusion of CD4-positive cells (specifically, of regulatory T cells) from normal healthy donor ameliorated the cerebellar ataxic phenotype and enhanced the survival of Purkinje cells. Conversely, the depletion of regulatory T cells enhanced the onset of the neurological phenotype. On the other hand, circulating inflammatory monocytes were found to be involved in the progression of Purkinje cell degeneration, whereas the depletion of resident microglia had little effect. Our findings reveal a novel role of the adaptive and the innate immune systems in NPC1 neuropathology.
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Affiliation(s)
- Toru Yasuda
- Department of Human Genetics, National Center for Child Health and Development, Tokyo, Japan
| | - Toru Uchiyama
- Department of Human Genetics, National Center for Child Health and Development, Tokyo, Japan
| | - Nobuyuki Watanabe
- Department of Human Genetics, National Center for Child Health and Development, Tokyo, Japan
| | - Noriko Ito
- Department of Maternal-Fetal Biology, National Center for Child Health and Development, Tokyo, Japan
| | - Kazuhiko Nakabayashi
- Department of Maternal-Fetal Biology, National Center for Child Health and Development, Tokyo, Japan
| | - Hideki Mochizuki
- Department of Neurology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Masafumi Onodera
- Department of Human Genetics, National Center for Child Health and Development, Tokyo, Japan
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5
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Casas M, Murray KD, Hino K, Vierra NC, Simó S, Trimmer JS, Dixon RE, Dickson EJ. NPC1-dependent alterations in K V2.1-Ca V1.2 nanodomains drive neuronal death in models of Niemann-Pick Type C disease. Nat Commun 2023; 14:4553. [PMID: 37507375 PMCID: PMC10382591 DOI: 10.1038/s41467-023-39937-w] [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: 08/17/2022] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Lysosomes communicate through cholesterol transfer at endoplasmic reticulum (ER) contact sites. At these sites, the Niemann Pick C1 cholesterol transporter (NPC1) facilitates the removal of cholesterol from lysosomes, which is then transferred to the ER for distribution to other cell membranes. Mutations in NPC1 result in cholesterol buildup within lysosomes, leading to Niemann-Pick Type C (NPC) disease, a progressive and fatal neurodegenerative disorder. The molecular mechanisms connecting NPC1 loss to NPC-associated neuropathology remain unknown. Here we show both in vitro and in an animal model of NPC disease that the loss of NPC1 function alters the distribution and activity of voltage-gated calcium channels (CaV). Underlying alterations in calcium channel localization and function are KV2.1 channels whose interactions drive calcium channel clustering to enhance calcium entry and fuel neurotoxic elevations in mitochondrial calcium. Targeted disruption of KV2-CaV interactions rescues aberrant CaV1.2 clustering, elevated mitochondrial calcium, and neurotoxicity in vitro. Our findings provide evidence that NPC is a nanostructural ion channel clustering disease, characterized by altered distribution and activity of ion channels at membrane contacts, which contribute to neurodegeneration.
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Affiliation(s)
- Maria Casas
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
| | - Karl D Murray
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
- Department of Psychiatry & Behavioral Sciences, School of Medicine, University of California, Davis, CA, USA
| | - Keiko Hino
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA, USA
| | - Nicholas C Vierra
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
| | - Sergi Simó
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA, USA
| | - James S Trimmer
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
| | - Rose E Dixon
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA
| | - Eamonn J Dickson
- Department of Physiology and Membrane Biology, School of Medicine, University of California, Davis, CA, USA.
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6
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Han S, Wang Q, Song Y, Pang M, Ren C, Wang J, Guan D, Xu W, Li F, Wang F, Zhou X, Fernández-Hernando C, Zhang H, Wu D, Ye Z. Lithium ameliorates Niemann-Pick C1 disease phenotypes by impeding STING/SREBP2 activation. iScience 2023; 26:106613. [PMID: 37128603 PMCID: PMC10148154 DOI: 10.1016/j.isci.2023.106613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/18/2022] [Accepted: 03/31/2023] [Indexed: 05/03/2023] Open
Abstract
Niemann-Pick disease type C (NP-C) is a genetic lysosomal disorder associated with progressive neurodegenerative phenotypes. Its therapeutic options are very limited. Here, we show that lithium treatment improves ataxia and feeding phenotypes, attenuates cerebellar inflammation and degeneration, and extends survival in Npc1 mouse models. In addition, lithium suppresses STING activation, SREBP2 processing to its mature form and the expression of the target genes in the Npc1 mice and in Npc1-deficient fibroblasts. Lithium impedes STING/SREBP2 transport from the ER to the Golgi, a step required for STING activation and SREBP2 processing, probably by lowering cytosolic calcium concentrations. This effect of lithium on STING/SREBP2 transport provides a mechanistic explanation for lithium's effects on Npc1 mice. Thus, this study reveals a potential therapeutic option for NP-C patients as well as a strategy to reduce active STING/SREBP2 pathway.
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Affiliation(s)
- Shiqian Han
- Department of Tropical Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Qijun Wang
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT06520, USA
- Departments of Pharmacology, Yale University School of Medicine, New Haven, CT06520, USA
- Shanghai Institute of Immunology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Yongfeng Song
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT06520, USA
- Departments of Pharmacology, Yale University School of Medicine, New Haven, CT06520, USA
| | - Mao Pang
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing 400044, China
| | - Chunguang Ren
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT06520, USA
- Departments of Pharmacology, Yale University School of Medicine, New Haven, CT06520, USA
| | - Jing Wang
- Department of Tropical Medicine, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Dongwei Guan
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing 400044, China
| | - Wei Xu
- Biostatistics, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Fangyong Li
- Biostatistics, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Fengchao Wang
- Institute of Combined Injury, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Xinyuan Zhou
- Department of Immunology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Carlos Fernández-Hernando
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT06520, USA
- Comparative Medicine and Pathology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Huiwen Zhang
- Department of Pediatric Endocrinology and Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Dianqing Wu
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT06520, USA
- Departments of Pharmacology, Yale University School of Medicine, New Haven, CT06520, USA
| | - Zhijia Ye
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing 400044, China
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7
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Bouron A. Neuronal Store-Operated Calcium Channels. Mol Neurobiol 2023:10.1007/s12035-023-03352-5. [PMID: 37118324 DOI: 10.1007/s12035-023-03352-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/13/2023] [Indexed: 04/30/2023]
Abstract
The endoplasmic reticulum (ER) is the major intracellular calcium (Ca2+) storage compartment in eukaryotic cells. In most instances, the mobilization of Ca2+ from this store is followed by a delayed and sustained uptake of Ca2+ through Ca2+-permeable channels of the cell surface named store-operated Ca2+ channels (SOCCs). This gives rise to a store-operated Ca2+ entry (SOCE) that has been thoroughly investigated in electrically non-excitable cells where it is the principal regulated Ca2+ entry pathway. The existence of this Ca2+ route in neurons has long been a matter of debate. However, a growing body of experimental evidence indicates that the recruitment of Ca2+ from neuronal ER Ca2+ stores generates a SOCE. The present review summarizes the main studies supporting the presence of a depletion-dependent Ca2+ entry in neurons. It also addresses the question of the molecular composition of neuronal SOCCs, their expression, pharmacological properties, as well as their physiological relevance.
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Affiliation(s)
- Alexandre Bouron
- Université Grenoble Alpes, CNRS, CEA, Inserm UA13 BGE, 38000, Grenoble, France.
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8
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Kim S, Ochoa K, Melli SE, Yousufzai FAK, Barrera ZD, Williams AA, McIntyre G, Delgado E, Bolish JN, Macleod CM, Boghos M, Lens HP, Ramos AG, Wilson VB, Maloney K, Padron ZM, Khan AH, Blanco RE, Soto I. Disruptive lysosomal-metabolic signaling and neurodevelopmental deficits that precede Purkinje cell loss in a mouse model of Niemann-Pick Type-C disease. Sci Rep 2023; 13:5665. [PMID: 37024714 PMCID: PMC10079843 DOI: 10.1038/s41598-023-32971-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 04/05/2023] [Indexed: 04/08/2023] Open
Abstract
Purkinje cell (PC) loss occurs at an early age in patients and animal models of Niemann-Pick Type C (NPC), a lysosomal storage disease caused by mutations in the Npc1 or Npc2 genes. Although degeneration of PCs occurs early in NPC, little is known about how NPC1 deficiency affects the postnatal development of PCs. Using the Npc1nmf164 mouse model, we found that NPC1 deficiency significantly affected the postnatal development of PC dendrites and synapses. The developing dendrites of Npc1nmf164 PCs were significantly deficient in mitochondria and lysosomes. Furthermore, anabolic (mTORC1) and catabolic (TFEB) signaling pathways were not only perturbed but simultaneously activated in NPC1-deficient PCs, suggesting a loss of metabolic balance. We also found that mice with conditional heterozygous deletion of the Phosphatase and Tensin Homolog Deleted on Chromosome 10 gene (Pten-cHet), an inhibitor of mTORC1, showed similar early dendritic alterations in PCs to those found in Npc1-deficient mice. However, in contrast to Npc1nmf164 mice, Pten-cHet mice exhibited the overactivation of the mTORC1 pathway but with a strong inhibition of TFEB signaling, along with no dendritic mitochondrial reductions by the end of their postnatal development. Our data suggest that disruption of the lysosomal-metabolic signaling in PCs causes dendritic and synaptic developmental deficits that precede and promote their early degeneration in NPC.
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Affiliation(s)
- Sarah Kim
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Kathleen Ochoa
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Sierra E Melli
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Fawad A K Yousufzai
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Zerian D Barrera
- Department of Biological Science, Rowan University, Glassboro, NJ, USA
| | - Aela A Williams
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ, USA
| | - Gianna McIntyre
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Esteban Delgado
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - James N Bolish
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ, USA
| | | | - Mary Boghos
- Department of Biology, Providence College, Providence, RI, USA
| | - Hayden P Lens
- Department of Biology, Providence College, Providence, RI, USA
| | - Alex G Ramos
- Department of Biology, Providence College, Providence, RI, USA
| | - Vincent B Wilson
- Department of Biological Science, Rowan University, Glassboro, NJ, USA
| | - Kelly Maloney
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Zachary M Padron
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Amaal H Khan
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ, USA
| | - Rosa E Blanco
- The Institute of Neurobiology, University of Puerto Rico, San Juan, PR, USA
| | - Ileana Soto
- Department of Biology, Providence College, Providence, RI, USA.
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9
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Pfrieger FW. The Niemann-Pick type diseases – A synopsis of inborn errors in sphingolipid and cholesterol metabolism. Prog Lipid Res 2023; 90:101225. [PMID: 37003582 DOI: 10.1016/j.plipres.2023.101225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
Disturbances of lipid homeostasis in cells provoke human diseases. The elucidation of the underlying mechanisms and the development of efficient therapies represent formidable challenges for biomedical research. Exemplary cases are two rare, autosomal recessive, and ultimately fatal lysosomal diseases historically named "Niemann-Pick" honoring the physicians, whose pioneering observations led to their discovery. Acid sphingomyelinase deficiency (ASMD) and Niemann-Pick type C disease (NPCD) are caused by specific variants of the sphingomyelin phosphodiesterase 1 (SMPD1) and NPC intracellular cholesterol transporter 1 (NPC1) or NPC intracellular cholesterol transporter 2 (NPC2) genes that perturb homeostasis of two key membrane components, sphingomyelin and cholesterol, respectively. Patients with severe forms of these diseases present visceral and neurologic symptoms and succumb to premature death. This synopsis traces the tortuous discovery of the Niemann-Pick diseases, highlights important advances with respect to genetic culprits and cellular mechanisms, and exposes efforts to improve diagnosis and to explore new therapeutic approaches.
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10
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Sterling FR, D'Amico J, Brumfield AM, Huegel KL, Vaughan PS, Morris K, Schwarz S, Joyce MV, Boggess B, Champion MM, Maciuba K, Allen P, Marasco E, Koch G, Gonzalez P, Hodges S, Leahy S, Gerstbauer E, Hinchcliffe EH, Vaughan KT. StARD9 is a novel lysosomal kinesin required for membrane tubulation, cholesterol transport and Purkinje cell survival. J Cell Sci 2023; 136:292582. [PMID: 36861884 DOI: 10.1242/jcs.260662] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/18/2023] [Indexed: 03/03/2023] Open
Abstract
The pathological accumulation of cholesterol is a signature feature of Niemann-Pick type C (NPC) disease, in which excessive lipid levels induce Purkinje cell death in the cerebellum. NPC1 encodes a lysosomal cholesterol-binding protein, and mutations in NPC1 drive cholesterol accumulation in late endosomes and lysosomes (LE/Ls). However, the fundamental role of NPC proteins in LE/L cholesterol transport remains unclear. Here, we demonstrate that NPC1 mutations impair the projection of cholesterol-containing membrane tubules from the surface of LE/Ls. A proteomic survey of purified LE/Ls identified StARD9 as a novel lysosomal kinesin responsible for LE/L tubulation. StARD9 contains an N-terminal kinesin domain, a C-terminal StART domain, and a dileucine signal shared with other lysosome-associated membrane proteins. Depletion of StARD9 disrupts LE/L tubulation, paralyzes bidirectional LE/L motility and induces accumulation of cholesterol in LE/Ls. Finally, a novel StARD9 knock-out mouse recapitulates the progressive loss of Purkinje cells in the cerebellum. Together, these studies identify StARD9 as a microtubule motor protein responsible for LE/L tubulation and provide support for a novel model of LE/L cholesterol transport that becomes impaired in NPC disease.
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Affiliation(s)
- Felicity R Sterling
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Jon D'Amico
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | | | - Kara L Huegel
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Patricia S Vaughan
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Kathryn Morris
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Shelby Schwarz
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Michelle V Joyce
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.,University of Notre Dame Proteomics and Mass Spectrometry Facility, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Bill Boggess
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.,University of Notre Dame Proteomics and Mass Spectrometry Facility, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Matthew M Champion
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.,University of Notre Dame Proteomics and Mass Spectrometry Facility, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Kevin Maciuba
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Philip Allen
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Eric Marasco
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Grant Koch
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Peter Gonzalez
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Shannon Hodges
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Shannon Leahy
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Erica Gerstbauer
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | | | - Kevin T Vaughan
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.,Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, IN 46556, USA
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11
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Álvarez A, Gutiérrez D, Chandía-Cristi A, Yáñez M, Zanlungo S. c-Abl kinase at the crossroads of healthy synaptic remodeling and synaptic dysfunction in neurodegenerative diseases. Neural Regen Res 2023; 18:237-243. [PMID: 35900397 PMCID: PMC9396477 DOI: 10.4103/1673-5374.346540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Our ability to learn and remember depends on the active formation, remodeling, and elimination of synapses. Thus, the development and growth of synapses as well as their weakening and elimination are essential for neuronal rewiring. The structural reorganization of synaptic complexes, changes in actin cytoskeleton and organelle dynamics, as well as modulation of gene expression, determine synaptic plasticity. It has been proposed that dysregulation of these key synaptic homeostatic processes underlies the synaptic dysfunction observed in many neurodegenerative diseases. Much is known about downstream signaling of activated N-methyl-D-aspartate and α-amino-3-hydroxy-5-methyl-4-isoazolepropionate receptors; however, other signaling pathways can also contribute to synaptic plasticity and long-lasting changes in learning and memory. The non-receptor tyrosine kinase c-Abl (ABL1) is a key signal transducer of intra and extracellular signals, and it shuttles between the cytoplasm and the nucleus. This review focuses on c-Abl and its synaptic and neuronal functions. Here, we discuss the evidence showing that the activation of c-Abl can be detrimental to neurons, promoting the development of neurodegenerative diseases. Nevertheless, c-Abl activity seems to be in a pivotal balance between healthy synaptic plasticity, regulating dendritic spines remodeling and gene expression after cognitive training, and synaptic dysfunction and loss in neurodegenerative diseases. Thus, c-Abl genetic ablation not only improves learning and memory and modulates the brain genetic program of trained mice, but its absence provides dendritic spines resiliency against damage. Therefore, the present review has been designed to elucidate the common links between c-Abl regulation of structural changes that involve the actin cytoskeleton and organelles dynamics, and the transcriptional program activated during synaptic plasticity. By summarizing the recent discoveries on c-Abl functions, we aim to provide an overview of how its inhibition could be a potentially fruitful treatment to improve degenerative outcomes and delay memory loss.
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12
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Wang Q, #, Zhang Y, #, Du Q, Zhao X, Wang W, Zhai Q, Xiang M. SKF96365 impedes spinal glutamatergic transmission-mediated neuropathic allodynia. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2023; 27:39-48. [PMID: 36575932 PMCID: PMC9806642 DOI: 10.4196/kjpp.2023.27.1.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/18/2022] [Accepted: 09/08/2022] [Indexed: 12/29/2022]
Abstract
Spinal nerve injury causes mechanical allodynia and structural imbalance of neurotransmission, which were typically associated with calcium overload. Store-operated calcium entry (SOCE) is considered crucial elements-mediating intracellular calcium homeostasis, ion channel activity, and synaptic plasticity. However, the underlying mechanism of SOCE in mediating neuronal transmitter release and synaptic transmission remains ambiguous in neuropathic pain. Neuropathic rats were operated by spinal nerve ligations. Neurotransmissions were assessed by whole-cell recording in substantia gelatinosa. Immunofluorescence staining of STIM1 with neuronal and glial biomarkers in the spinal dorsal horn. The endoplasmic reticulum stress level was estimated from qRT-PCR. Intrathecal injection of SOCE antagonist SKF96365 dose-dependently alleviated mechanical allodynia in ipsilateral hind paws of neuropathic rats with ED50 of 18 μg. Immunofluorescence staining demonstrated that STIM1 was specifically and significantly expressed in neurons but not astrocytes and microglia in the spinal dorsal horn. Bath application of SKF96365 inhibited enhanced miniature excitatory postsynaptic currents in a dosage-dependent manner without affecting miniature inhibitory postsynaptic currents. Mal-adaption of SOCE was commonly related to endoplasmic reticulum (ER) stress in the central nervous system. SKF96365 markedly suppressed ER stress levels by alleviating mRNA expression of C/EBP homologous protein and heat shock protein 70 in neuropathic rats. Our findings suggested that nerve injury might promote SOCE-mediated calcium levels, resulting in long-term imbalance of spinal synaptic transmission and behavioral sensitization, SKF96365 produces antinociception by alleviating glutamatergic transmission and ER stress. This work demonstrated the involvement of SOCE in neuropathic pain, implying that SOCE might be a potential target for pain management.
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Affiliation(s)
- Qiru Wang
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China
| | - #
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China
| | - Yang Zhang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai 200240, China
| | - #
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China
| | - Qiong Du
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China
| | - Xinjie Zhao
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China
| | - Wei Wang
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai 200240, China,Correspondence Ming Xiang, E-mail: , Qing Zhai, E-mail: , Wei Wang, E-mail:
| | - Qing Zhai
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China,Correspondence Ming Xiang, E-mail: , Qing Zhai, E-mail: , Wei Wang, E-mail:
| | - Ming Xiang
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Minhang Branch, Shanghai 200240, China,Correspondence Ming Xiang, E-mail: , Qing Zhai, E-mail: , Wei Wang, E-mail:
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13
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Dickson EJ. Role of Lysosomal Cholesterol in Regulating PI(4,5)P 2-Dependent Ion Channel Function. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1422:193-215. [PMID: 36988882 DOI: 10.1007/978-3-031-21547-6_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Lysosomes are central regulators of cellular growth and signaling. Once considered the acidic garbage can of the cell, their ever-expanding repertoire of functions include the regulation of cell growth, gene regulation, metabolic signaling, cell migration, and cell death. In this chapter, we detail how another of the lysosome's crucial roles, cholesterol transport, plays a vital role in the control of ion channel function and neuronal excitability through its ability to influence the abundance of the plasma membrane signaling lipid phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2). This chapter will introduce the biosynthetic pathways of cholesterol and PI(4,5)P2, discuss the molecular mechanisms through which each lipid distinctly regulates ion channels, and consider the interdependence of these lipids in the control of ion channel function.
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Affiliation(s)
- Eamonn J Dickson
- Department of Physiology and Membrane Biology, University of California, Davis, CA, USA.
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14
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Schultz ML, Schache KJ, Azaria RD, Kuiper EQ, Erwood S, Ivakine EA, Farhat NY, Porter FD, Pathmasiri KC, Cologna SM, Uhler MD, Lieberman AP. Species-specific differences in NPC1 protein trafficking govern therapeutic response in Niemann-Pick type C disease. JCI Insight 2022; 7:160308. [PMID: 36301667 PMCID: PMC9746915 DOI: 10.1172/jci.insight.160308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 10/26/2022] [Indexed: 01/12/2023] Open
Abstract
The folding and trafficking of transmembrane glycoproteins are essential for cellular homeostasis and are compromised in many diseases. In Niemann-Pick type C disease, a lysosomal disorder characterized by impaired intracellular cholesterol trafficking, the transmembrane glycoprotein NPC1 misfolds due to disease-causing missense mutations. While mutant NPC1 has emerged as a robust target for proteostasis modulators, drug development efforts have been unsuccessful in mouse models. Here, we demonstrated unexpected differences in trafficking through the medial Golgi between mouse and human I1061T-NPC1, a common disease-causing mutant. We established that these distinctions are governed by differences in the NPC1 protein sequence rather than by variations in the endoplasmic reticulum-folding environment. Moreover, we demonstrated direct effects of mutant protein trafficking on the response to small molecules that modulate the endoplasmic reticulum-folding environment by affecting Ca++ concentration. Finally, we developed a panel of isogenic human NPC1 iNeurons expressing WT, I1061T-, and R934L-NPC1 and demonstrated their utility in testing these candidate therapeutics. Our findings identify important rules governing mutant NPC1's response to proteostatic modulators and highlight the importance of species- and mutation-specific responses for therapy development.
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Affiliation(s)
- Mark L. Schultz
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Kylie J. Schache
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Ruth D. Azaria
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Esmée Q. Kuiper
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Steven Erwood
- Program in Genetics and Genome Biology, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada.,Department of Molecular Genetics and
| | - Evgueni A. Ivakine
- Program in Genetics and Genome Biology, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Nicole Y. Farhat
- Division of Translational Medicine, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Department of Health and Human Services, Bethesda, Maryland, USA
| | - Forbes D. Porter
- Division of Translational Medicine, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Department of Health and Human Services, Bethesda, Maryland, USA
| | | | | | - Michael D. Uhler
- Michigan Neuroscience Institute and,Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Andrew P. Lieberman
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
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15
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Wróbel M, Cendrowski J, Szymańska E, Grębowicz-Maciukiewicz M, Budick-Harmelin N, Macias M, Szybińska A, Mazur M, Kolmus K, Goryca K, Dąbrowska M, Paziewska A, Mikula M, Miączyńska M. ESCRT-I fuels lysosomal degradation to restrict TFEB/TFE3 signaling via the Rag-mTORC1 pathway. Life Sci Alliance 2022; 5:5/7/e202101239. [PMID: 35354596 PMCID: PMC8967991 DOI: 10.26508/lsa.202101239] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 12/13/2022] Open
Abstract
ESCRT-I deficiency impairs lysosome membrane turnover and induces homeostatic responses to lysosomal nutrient starvation including activation of MiT-TFE signaling caused by inhibition of the substrate-specific mTORC1 pathway. Within the endolysosomal pathway in mammalian cells, ESCRT complexes facilitate degradation of proteins residing in endosomal membranes. Here, we show that mammalian ESCRT-I restricts the size of lysosomes and promotes degradation of proteins from lysosomal membranes, including MCOLN1, a Ca2+ channel protein. The altered lysosome morphology upon ESCRT-I depletion coincided with elevated expression of genes annotated to biogenesis of lysosomes due to prolonged activation of TFEB/TFE3 transcription factors. Lack of ESCRT-I also induced transcription of cholesterol biosynthesis genes, in response to inefficient delivery of cholesterol from endolysosomal compartments. Among factors that could possibly activate TFEB/TFE3 signaling upon ESCRT-I deficiency, we excluded lysosomal cholesterol accumulation and Ca2+-mediated dephosphorylation of TFEB/TFE3. However, we discovered that this activation occurs due to the inhibition of Rag GTPase–dependent mTORC1 pathway that specifically reduced phosphorylation of TFEB at S122. Constitutive activation of the Rag GTPase complex in cells lacking ESCRT-I restored S122 phosphorylation and prevented TFEB/TFE3 activation. Our results indicate that ESCRT-I deficiency evokes a homeostatic response to counteract lysosomal nutrient starvation, that is, improper supply of nutrients derived from lysosomal degradation.
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Affiliation(s)
- Marta Wróbel
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Jarosław Cendrowski
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Ewelina Szymańska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | | | - Noga Budick-Harmelin
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Matylda Macias
- Microscopy and Cytometry Facility, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Aleksandra Szybińska
- Microscopy and Cytometry Facility, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Michał Mazur
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Krzysztof Kolmus
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Krzysztof Goryca
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Michalina Dąbrowska
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Agnieszka Paziewska
- Department of Gastroenterology, Hepatology and Clinical Oncology, Medical Center for Postgraduate Education, Warsaw, Poland
| | - Michał Mikula
- Department of Genetics, Maria Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Marta Miączyńska
- Laboratory of Cell Biology, International Institute of Molecular and Cell Biology, Warsaw, Poland
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16
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Marrone L, Marchi PM, Webster CP, Marroccella R, Coldicott I, Reynolds S, Alves-Cruzeiro J, Yang ZL, Higginbottom A, Khundadze M, Shaw PJ, Hübner CA, Livesey MR, Azzouz M. OUP accepted manuscript. Hum Mol Genet 2022; 31:2693-2710. [PMID: 35313342 PMCID: PMC9402239 DOI: 10.1093/hmg/ddac063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/26/2022] [Accepted: 03/10/2022] [Indexed: 11/26/2022] Open
Abstract
Hereditary spastic paraplegia type 15 (HSP15) is a neurodegenerative condition caused by the inability to produce SPG15 protein, which leads to lysosomal swelling. However, the link between lysosomal aberrations and neuronal death is poorly explored. To uncover the functional consequences of lysosomal aberrations in disease pathogenesis, we analyze human dermal fibroblasts from HSP15 patients as well as primary cortical neurons derived from an SPG15 knockout (KO) mouse model. We find that SPG15 protein loss induces defective anterograde transport, impaired neurite outgrowth, axonal swelling and reduced autophagic flux in association with the onset of lysosomal abnormalities. Additionally, we observe lipid accumulation within the lysosomal compartment, suggesting that distortions in cellular lipid homeostasis are intertwined with lysosomal alterations. We further demonstrate that SPG15 KO neurons exhibit synaptic dysfunction, accompanied by augmented vulnerability to glutamate-induced excitotoxicity. Overall, our study establishes an intimate link between lysosomal aberrations, lipid metabolism and electrophysiological impairments, suggesting that lysosomal defects are at the core of multiple neurodegenerative disease processes in HSP15.
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Affiliation(s)
- Lara Marrone
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
- Department of Neuroscience, Janssen Pharmaceutica, Beerse, Belgium
| | - Paolo M Marchi
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Christopher P Webster
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Raffaele Marroccella
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Ian Coldicott
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Steven Reynolds
- Academic Unit of Radiology, Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Royal Hallamshire Hospital, Sheffield, UK
| | - João Alves-Cruzeiro
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Zih-Liang Yang
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Adrian Higginbottom
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Mukhran Khundadze
- Institute of Human Genetics, Jena University Hospital, Friedrich-Schiller-University Jena, Jena, Germany
| | - Pamela J Shaw
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Christian A Hübner
- Institute of Human Genetics, Jena University Hospital, Friedrich-Schiller-University Jena, Jena, Germany
| | - Matthew R Livesey
- Sheffield Institute for Translational Neuroscience (SITraN), Department of Neuroscience, University of Sheffield, Sheffield, UK
| | - Mimoun Azzouz
- To whom correspondence should be addressed. Tel: +44 1142222238; Fax: +44 (0)114 2222290; Email
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17
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Tiscione SA, Casas M, Horvath JD, Lam V, Hino K, Ory DS, Santana LF, Simó S, Dixon RE, Dickson EJ. IP 3R-driven increases in mitochondrial Ca 2+ promote neuronal death in NPC disease. Proc Natl Acad Sci U S A 2021; 118:e2110629118. [PMID: 34580197 PMCID: PMC8501836 DOI: 10.1073/pnas.2110629118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2021] [Indexed: 01/05/2023] Open
Abstract
Ca2+ is the most ubiquitous second messenger in neurons whose spatial and temporal elevations are tightly controlled to initiate and orchestrate diverse intracellular signaling cascades. Numerous neuropathologies result from mutations or alterations in Ca2+ handling proteins; thus, elucidating molecular pathways that shape Ca2+ signaling is imperative. Here, we report that loss-of-function, knockout, or neurodegenerative disease-causing mutations in the lysosomal cholesterol transporter, Niemann-Pick Type C1 (NPC1), initiate a damaging signaling cascade that alters the expression and nanoscale distribution of IP3R type 1 (IP3R1) in endoplasmic reticulum membranes. These alterations detrimentally increase Gq-protein coupled receptor-stimulated Ca2+ release and spontaneous IP3R1 Ca2+ activity, leading to mitochondrial Ca2+ cytotoxicity. Mechanistically, we find that SREBP-dependent increases in Presenilin 1 (PS1) underlie functional and expressional changes in IP3R1. Accordingly, expression of PS1 mutants recapitulate, while PS1 knockout abrogates Ca2+ phenotypes. These data present a signaling axis that links the NPC1 lysosomal cholesterol transporter to the damaging redistribution and activity of IP3R1 that precipitates cell death in NPC1 disease and suggests that NPC1 is a nanostructural disease.
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Affiliation(s)
- Scott A Tiscione
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616
| | - Maria Casas
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616
| | - Jonathan D Horvath
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616
| | - Vincent Lam
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616
| | - Keiko Hino
- Department of Cell Biology and Human Anatomy, University of California, Davis, CA 95616
| | - Daniel S Ory
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - L Fernando Santana
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616
| | - Sergi Simó
- Department of Cell Biology and Human Anatomy, University of California, Davis, CA 95616
| | - Rose E Dixon
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616
| | - Eamonn J Dickson
- Department of Physiology and Membrane Biology, University of California, Davis, CA 95616;
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18
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Han S, Ren M, Kuang T, Pang M, Guan D, Liu Y, Wang Y, Zhang W, Ye Z. Cerebellar Long Noncoding RNA Expression Profile in a Niemann-Pick C Disease Mouse Model. Mol Neurobiol 2021; 58:5826-5836. [PMID: 34410604 PMCID: PMC8599378 DOI: 10.1007/s12035-021-02526-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 08/05/2021] [Indexed: 02/08/2023]
Abstract
Niemann-Pick type C (NP-C) disease is a neurodegenerative lysosomal storage disorder primarily caused by mutations in NPC1. However, its pathogenesis remains poorly understood. While mounting evidence has demonstrated the involvement of long noncoding RNAs (lncRNAs) in the pathogenesis of neurodegenerative disorders, the lncRNA expression profile in NP-C has not been determined. Here, we used RNA-seq analysis to determine lncRNA and mRNA expression profiles of the cerebella of NPC1−/− mice. We found that 272 lncRNAs and 856 mRNAs were significantly dysregulated in NPC1−/− mice relative to controls (≥ 2.0-fold, p < 0.05). Quantitative real-time PCR (qRT‐PCR) was utilized to validate the expression of selected lncRNAs and mRNAs. Next, a lncRNA-mRNA coexpression network was employed to examine the potential roles of the differentially expressed (DE) lncRNAs. Functional analysis revealed that mRNAs coexpressed with lncRNAs are mainly linked to immune system–related processes and neuroinflammation. Moreover, knockdown of the lncRNA H19 ameliorated changes in ROS levels and cell viability and suppressed the lipopolysaccharide (LPS)–induced inflammatory response in vitro. Our findings indicate that dysregulated lncRNA expression patterns are associated with NP-C pathogenesis and offer insight into the development of novel therapeutics based on lncRNAs.
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Affiliation(s)
- Shiqian Han
- Department of Tropical Medicine, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Meng Ren
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing, 400044, China
| | - Tianyin Kuang
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing, 400044, China
| | - Mao Pang
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing, 400044, China
| | - Dongwei Guan
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing, 400044, China
| | - Yesong Liu
- Cornell University, Ithaca, NY, 14853, USA
| | - Yong Wang
- Department of Laboratory Animal Science, College of Basic Medical Sciences, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Wengeng Zhang
- Precision Medicine Key Laboratory of Sichuan Province and Precision Medicine Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Zhijia Ye
- Department of Tropical Medicine, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China. .,Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing, 400044, China.
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19
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Lu M, Ward E, van Tartwijk FW, Kaminski CF. Advances in the study of organelle interactions and their role in neurodegenerative diseases enabled by super-resolution microscopy. Neurobiol Dis 2021; 159:105475. [PMID: 34390833 DOI: 10.1016/j.nbd.2021.105475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/28/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022] Open
Abstract
From the first illustrations of neuronal morphology by Ramón y Cajal to the recent three-dimensional reconstruction of synaptic connections, the development of modern neuroscience has greatly benefited from breakthroughs in imaging technology. This also applies specifically to the study of neurodegenerative diseases. Much of the research into these diseases relies on the direct visualisation of intracellular structures and their dynamics in degenerating neural cells, which cannot be fully resolved by diffraction-limited microscopes. Progress in the field has therefore been closely linked to the development of super-resolution imaging methods. Their application has greatly advanced our understanding of disease mechanisms, ranging from the structural progression of protein aggregates to defects in organelle morphology. Recent super-resolution studies have specifically implicated the disruption of inter-organelle interactions in multiple neurodegenerative diseases. In this article, we describe some of the key super-resolution techniques that have contributed to this field. We then discuss work to visualise changes in the structure and dynamics of organelles and associated dysfunctions. Finally, we consider what future developments in imaging technology may further our knowledge of these processes.
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Affiliation(s)
- Meng Lu
- Cambridge Infinitus Research Centre, Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK; Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK
| | - Edward Ward
- Cambridge Infinitus Research Centre, Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK; Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK
| | - Francesca W van Tartwijk
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK
| | - Clemens F Kaminski
- Cambridge Infinitus Research Centre, Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK; Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, UK; UK Dementia Research Institute at the University of Cambridge and Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 0AH, UK.
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20
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Kutchukian C, Vivas O, Casas M, Jones JG, Tiscione SA, Simó S, Ory DS, Dixon RE, Dickson EJ. NPC1 regulates the distribution of phosphatidylinositol 4-kinases at Golgi and lysosomal membranes. EMBO J 2021; 40:e105990. [PMID: 34019311 PMCID: PMC8246069 DOI: 10.15252/embj.2020105990] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 03/11/2021] [Accepted: 03/19/2021] [Indexed: 12/15/2022] Open
Abstract
Cholesterol and phosphoinositides (PI) are two critically important lipids that are found in cellular membranes and dysregulated in many disorders. Therefore, uncovering molecular pathways connecting these essential lipids may offer new therapeutic insights. We report that loss of function of lysosomal Niemann-Pick Type C1 (NPC1) cholesterol transporter, which leads to neurodegenerative NPC disease, initiates a signaling cascade that alters the cholesterol/phosphatidylinositol 4-phosphate (PtdIns4P) countertransport cycle between Golgi-endoplasmic reticulum (ER), as well as lysosome-ER membrane contact sites (MCS). Central to these disruptions is increased recruitment of phosphatidylinositol 4-kinases-PI4KIIα and PI4KIIIβ-which boosts PtdIns4P metabolism at Golgi and lysosomal membranes. Aberrantly increased PtdIns4P levels elevate constitutive anterograde secretion from the Golgi complex, and mTORC1 recruitment to lysosomes. NPC1 disease mutations phenocopy the transporter loss of function and can be rescued by inhibition or knockdown of either key phosphoinositide enzymes or their recruiting partners. In summary, we show that the lysosomal NPC1 cholesterol transporter tunes the molecular content of Golgi and lysosome MCS to regulate intracellular trafficking and growth signaling in health and disease.
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Affiliation(s)
- Candice Kutchukian
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA
| | - Oscar Vivas
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA,Present address:
Department of Physiology and BiophysicsUniversity of WashingtonSeattleWAUSA
| | - Maria Casas
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA
| | - Julia G Jones
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA
| | - Scott A Tiscione
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA
| | - Sergi Simó
- Department of Cell Biology & Human AnatomyUniversity of CaliforniaDavisCAUSA
| | - Daniel S Ory
- Department of Internal MedicineWashington University School of MedicineSt. LouisMOUSA
| | - Rose E Dixon
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA
| | - Eamonn J Dickson
- Department of Physiology and Membrane BiologyUniversity of CaliforniaDavisCAUSA
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21
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Loss of NPC1 enhances phagocytic uptake and impairs lipid trafficking in microglia. Nat Commun 2021; 12:1158. [PMID: 33627648 PMCID: PMC7904859 DOI: 10.1038/s41467-021-21428-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 01/27/2021] [Indexed: 02/08/2023] Open
Abstract
Niemann-Pick type C disease is a rare neurodegenerative disorder mainly caused by mutations in NPC1, resulting in abnormal late endosomal/lysosomal lipid storage. Although microgliosis is a prominent pathological feature, direct consequences of NPC1 loss on microglial function remain not fully characterized. We discovered pathological proteomic signatures and phenotypes in NPC1-deficient murine models and demonstrate a cell autonomous function of NPC1 in microglia. Loss of NPC1 triggers enhanced phagocytic uptake and impaired myelin turnover in microglia that precede neuronal death. Npc1−/− microglia feature a striking accumulation of multivesicular bodies and impaired trafficking of lipids to lysosomes while lysosomal degradation function remains preserved. Molecular and functional defects were also detected in blood-derived macrophages of NPC patients that provide a potential tool for monitoring disease. Our study underscores an essential cell autonomous role for NPC1 in immune cells and implies microglial therapeutic potential. Niemann-Pick type C disease is a rare childhood neurodegenerative disorder predominantly caused by mutations in NPC1, resulting in abnormal late endosomal and lysosomal defects. Here the authors show that NPC1 disruption largely impairs microglial function.
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22
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Li ES, Saha MS. Optimizing Calcium Detection Methods in Animal Systems: A Sandbox for Synthetic Biology. Biomolecules 2021; 11:343. [PMID: 33668387 PMCID: PMC7996158 DOI: 10.3390/biom11030343] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 12/16/2022] Open
Abstract
Since the 1970s, the emergence and expansion of novel methods for calcium ion (Ca2+) detection have found diverse applications in vitro and in vivo across a series of model animal systems. Matched with advances in fluorescence imaging techniques, the improvements in the functional range and stability of various calcium indicators have significantly enhanced more accurate study of intracellular Ca2+ dynamics and its effects on cell signaling, growth, differentiation, and regulation. Nonetheless, the current limitations broadly presented by organic calcium dyes, genetically encoded calcium indicators, and calcium-responsive nanoparticles suggest a potential path toward more rapid optimization by taking advantage of a synthetic biology approach. This engineering-oriented discipline applies principles of modularity and standardization to redesign and interrogate endogenous biological systems. This review will elucidate how novel synthetic biology technologies constructed for eukaryotic systems can offer a promising toolkit for interfacing with calcium signaling and overcoming barriers in order to accelerate the process of Ca2+ detection optimization.
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Affiliation(s)
| | - Margaret S. Saha
- Department of Biology, College of William and Mary, Williamsburg, VA 23185, USA;
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Puthanveetil P, Kong X, Bräse S, Voros G, Peer WA. Transcriptome analysis of two structurally related flavonoids; Apigenin and Chrysin revealed hypocholesterolemic and ketogenic effects in mouse embryonic fibroblasts. Eur J Pharmacol 2020; 893:173804. [PMID: 33347826 DOI: 10.1016/j.ejphar.2020.173804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/02/2020] [Accepted: 12/10/2020] [Indexed: 12/14/2022]
Abstract
There is no known single therapeutic drug for treating hypercholesterolemia that comes with negligible systemic side effects. In the current study, using next generation RNA sequencing approach in mouse embryonic fibroblasts we discovered that two structurally related flavonoid compounds. Apigenin and Chrysin exhibited moderate blocking ability of multiple transcripts that regulate rate limiting enzymes in the cholesterol biosynthesis pathway. The observed decrease in cholesterol biosynthesis pathway correlated well with an increase in transcripts involved in generation and trafficking of ketone bodies as evident by the upregulation of Bdh1 and Slc16a6 transcripts. The hypocholesterolemic potential of Apigenin and Chrysin at higher concentrations along with their ability to generate ketogenic substrate especially during embryonic stage is useful or detrimental for embryonic health is not clear and still debatable. Our study will serve as a steppingstone to further the investigation in whole animal studies and also in translating this knowledge to human studies.
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Affiliation(s)
- Prasanth Puthanveetil
- Department of Pharmacology, College of Graduate Studies, Midwestern University, Downers Grove, IL, USA.
| | - Xiaoli Kong
- Department of Mathematics and Statistics, Loyola University Chicago, Chicago, IL, USA.
| | - Stefan Bräse
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), Hermann von Helmholtz Platz 1, 76344, Eggenstein Leopoldshafen, Germany.
| | - Gabor Voros
- Department of Cardiovascular Diseases, University Hospital Gasthuisberg, Catholic University Leuven, Herestraat 49, 3000, Leuven, Belgium.
| | - Wendy Ann Peer
- Department of Environmental Science and Technology, College of Agricultural and Natural Resources, University of Maryland, MD, USA.
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Gowrishankar S, Cologna SM, Givogri MI, Bongarzone ER. Deregulation of signalling in genetic conditions affecting the lysosomal metabolism of cholesterol and galactosyl-sphingolipids. Neurobiol Dis 2020; 146:105142. [PMID: 33080336 PMCID: PMC8862610 DOI: 10.1016/j.nbd.2020.105142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 09/04/2020] [Accepted: 10/14/2020] [Indexed: 12/15/2022] Open
Abstract
The role of lipids in neuroglial function is gaining momentum in part due to a better understanding of how many lipid species contribute to key cellular signalling pathways at the membrane level. The description of lipid rafts as membrane domains composed by defined classes of lipids such as cholesterol and sphingolipids has greatly helped in our understanding of how cellular signalling can be regulated and compartmentalized in neurons and glial cells. Genetic conditions affecting the metabolism of these lipids greatly impact on how some of these signalling pathways work, providing a context to understand the biological function of the lipid. Expectedly, abnormal metabolism of several lipids such as cholesterol and galactosyl-sphingolipids observed in several metabolic conditions involving lysosomal dysfunction are often accompanied by neuronal and myelin dysfunction. This review will discuss the role of lysosomal biology in the context of deficiencies in the metabolism of cholesterol and galactosyl-sphingolipids and their impact on neural function in three genetic disorders: Niemann-Pick type C, Metachromatic leukodystrophy and Krabbe’s disease.
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Affiliation(s)
- S Gowrishankar
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL, USA.
| | - S M Cologna
- Department of Chemistry, University of Illinois, Chicago, IL, USA.
| | - M I Givogri
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL, USA.
| | - E R Bongarzone
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL, USA.
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25
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Sun Y, Nascimento Da Conceicao V, Ahamad N, Madesh M, Singh BB. Spatial localization of SOCE channels and its modulators regulate neuronal physiology and contributes to pathology. CURRENT OPINION IN PHYSIOLOGY 2020. [DOI: 10.1016/j.cophys.2020.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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26
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Yañez MJ, Marín T, Balboa E, Klein AD, Alvarez AR, Zanlungo S. Finding pathogenic commonalities between Niemann-Pick type C and other lysosomal storage disorders: Opportunities for shared therapeutic interventions. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165875. [PMID: 32522631 DOI: 10.1016/j.bbadis.2020.165875] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/06/2020] [Accepted: 06/03/2020] [Indexed: 12/12/2022]
Abstract
Lysosomal storage disorders (LSDs) are diseases characterized by the accumulation of macromolecules in the late endocytic system and are caused by inherited defects in genes that encode mainly lysosomal enzymes or transmembrane lysosomal proteins. Niemann-Pick type C disease (NPCD), a LSD characterized by liver damage and progressive neurodegeneration that leads to early death, is caused by mutations in the genes encoding the NPC1 or NPC2 proteins. Both proteins are involved in the transport of cholesterol from the late endosomal compartment to the rest of the cell. Loss of function of these proteins causes primary cholesterol accumulation, and secondary accumulation of other lipids, such as sphingolipids, in lysosomes. Despite years of studying the genetic and molecular bases of NPCD and related-lysosomal disorders, the pathogenic mechanisms involved in these diseases are not fully understood. In this review we will summarize the pathogenic mechanisms described for NPCD and we will discuss their relevance for other LSDs with neurological components such as Niemann- Pick type A and Gaucher diseases. We will particularly focus on the activation of signaling pathways that may be common to these three pathologies with emphasis on how the intra-lysosomal accumulation of lipids leads to pathology, specifically to neurological impairments. We will show that although the primary lipid storage defect is different in these three LSDs, there is a similar secondary accumulation of metabolites and activation of signaling pathways that can lead to common pathogenic mechanisms. This analysis might help to delineate common pathological mechanisms and therapeutic targets for lysosomal storage diseases.
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Affiliation(s)
- M J Yañez
- Department of Gastroenterology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - T Marín
- Department of Gastroenterology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - E Balboa
- Department of Gastroenterology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - A D Klein
- Centro de Genética y Genómica, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - A R Alvarez
- Laboratory of Cell Signaling, Department of Cellular and Molecular Biology, Biological Sciences Faculty, Pontificia Universidad Católica de Chile, Santiago, Chile; CARE UC, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - S Zanlungo
- Department of Gastroenterology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
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Pathmasiri KC, Pergande MR, Tobias F, Rebiai R, Rosenhouse-Dantsker A, Bongarzone ER, Cologna SM. Mass spectrometry imaging and LC/MS reveal decreased cerebellar phosphoinositides in Niemann-Pick type C1-null mice. J Lipid Res 2020; 61:1004-1013. [PMID: 32371566 DOI: 10.1194/jlr.ra119000606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 04/21/2020] [Indexed: 12/18/2022] Open
Abstract
Niemann-Pick disease type C1 (NPC1) is a lipid storage disorder in which cholesterol and glycosphingolipids accumulate in late endosomal/lysosomal compartments because of mutations in the NPC1 gene. A hallmark of NPC1 is progressive neurodegeneration of the cerebellum as well as visceral organ damage; however, the mechanisms driving this disease pathology are not fully understood. Phosphoinositides are phospholipids that play distinct roles in signal transduction and vesicle trafficking. Here, we utilized a consensus spectra analysis of MS imaging data sets and orthogonal LC/MS analyses to evaluate the spatial distribution of phosphoinositides and quantify them in cerebellar tissue from Npc1-null mice. Our results suggest significant depletion of multiple phosphoinositide species, including PI, PIP, and PIP2, in the cerebellum of the Npc1-null mice in both whole-tissue lysates and myelin-enriched fractions. Additionally, we observed altered levels of the regulatory enzyme phosphatidylinositol 4-kinase type 2α in Npc1-null mice. In contrast, the levels of related kinases, phosphatases, and transfer proteins were unaltered in the Npc1-null mouse model, as observed by Western blot analysis. Our discovery of phosphoinositide lipid biomarkers for NPC1 opens new perspectives on the pathophysiology underlying this fatal neurodegenerative disease.
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Affiliation(s)
| | | | - Fernando Tobias
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL
| | - Rima Rebiai
- Laboratory of Integrated Neuroscience, University of Illinois at Chicago, Chicago, IL; Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL
| | | | - Ernesto R Bongarzone
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL
| | - Stephanie M Cologna
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL; Laboratory of Integrated Neuroscience, University of Illinois at Chicago, Chicago, IL. mailto:
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Neuropathophysiology of Lysosomal Storage Diseases: Synaptic Dysfunction as a Starting Point for Disease Progression. J Clin Med 2020; 9:jcm9030616. [PMID: 32106459 PMCID: PMC7141115 DOI: 10.3390/jcm9030616] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/21/2020] [Accepted: 02/21/2020] [Indexed: 12/11/2022] Open
Abstract
About two thirds of the patients affected with lysosomal storage diseases (LSD) experience neurological manifestations, such as developmental delay, seizures, or psychiatric problems. In order to develop efficient therapies, it is crucial to understand the neuropathophysiology underlying these symptoms. How exactly lysosomal storage affects biogenesis and function of neurons is still under investigation however recent research highlights a substantial role played by synaptic defects, such as alterations in synaptic spines, synaptic proteins, postsynaptic densities, and synaptic vesicles that might lead to functional impairments in synaptic transmission and neurodegeneration, finally culminating in massive neuronal death and manifestation of cognitive symptoms. Unveiling how the synaptic components are affected in neurological LSD will thus enable a better understanding of the complexity of disease progression as well as identify crucial targets of therapeutic relevance and optimal time windows for targeted intervention.
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Shrestha P, Zhang Y, Chen WJ, Wong TY. Triclosan: antimicrobial mechanisms, antibiotics interactions, clinical applications, and human health. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, TOXICOLOGY AND CARCINOGENESIS 2020; 38:245-268. [PMID: 32955413 DOI: 10.1080/26896583.2020.1809286] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The large-scale applications of Triclosan in industrial and household products have created many health and environmental concerns. Despite the fears of its drug-resistance and other issues, Triclosan is still an effective drug against many infectious organisms. Knowing the cross-interactions of Triclosan with different antibiotics, bacteria, and humans can provide much-needed information for the risk assessment of this drug. We review the current understanding of the antimicrobial mechanisms of Triclosan, how microbes become resistant to Triclosan, and the synergistic and antagonistic effects of Triclosan with different antibiotics. Current literature on the clinical applications of Triclosan and its effect on fetus/child development are also summarized.
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Affiliation(s)
- Prabin Shrestha
- Biological Sciences Department, University of Memphis, Memphis, Tennessee, USA
| | | | - Wen-Jen Chen
- Biological Sciences Department, University of Memphis, Memphis, Tennessee, USA
| | - Tit-Yee Wong
- Biological Sciences Department, University of Memphis, Memphis, Tennessee, USA
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30
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Cologna SM. A calcium message for Niemann-Pick type C. J Cell Biol 2019; 218:3890-3891. [PMID: 31727775 PMCID: PMC6891091 DOI: 10.1083/jcb.201911021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Calcium is a ubiquitous secondary messenger that is critical for cellular function. In the highlighted article, Tiscione et al. (2019. J. Cell. Biol. https://doi.org/10.1083/jcb.201903018) describe a link between lysosomal cholesterol storage, calcium distribution alterations, and neuronal morphology in the neurodegenerative disorder Niemann-Pick type C.
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Affiliation(s)
- Stephanie M Cologna
- Department of Chemistry and Laboratory of Integrated Neuroscience, University of Illinois at Chicago, Chicago, IL
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