1
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Chauhan H, Carruthers N, Stemmer P, Schneider BP, Moszczynska A. Neurotoxic Methamphetamine Doses Alter CDCel-1 Levels and Its Interaction with Vesicular Monoamine Transporter-2 in Rat Striatum. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.21.604458. [PMID: 39091864 PMCID: PMC11291068 DOI: 10.1101/2024.07.21.604458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
In recent years, methamphetamine METH misuse in the US has been rapidly increasing and there is no FDA-approved pharmacotherapy for METH use disorder (MUD). In addition to being dependent on the drug, people with MUD develop a variety of neurological problems related to the toxicity of this drug. A variety of molecular mechanisms underlying METH neurotoxicity has been identified, including dysfunction of the neuroprotective protein parkin. However, it is not known whether parkin loss of function within striatal dopaminergic (DAergic) terminals translates into a decrease in DA storage capacity. This study examined the relationship between parkin, its substrate cell division cycle related-1 (CDCrel-1), and vesicular monoamine transporter-2 (VMAT2) in METH neurotoxicity in male Sprague Dawley rats. To also assess individual differences in response to METH's neurotoxic effects, a large group of rats was treated with binge METH or saline and sacrificed 1h or 24h later. This study is the first to show that binge METH alters the levels and subcellular localization of CDCrel-1 and that CDCrel-1 interacts with VMAT2 and increases its levels at the plasma membrane. Furthermore, we found wide individual differences in the responses of measured indices to METH. Proteomic analysis of VMAT-2-associated proteins revealed upregulation of several proteins involved in the exocytosis/endocytosis cycle. The results suggest that at 1h after METH binge, DAergic neurons are engaged in counteracting METH-induced toxic effects, including oxidative stress- and hyperthermia-induced inhibition of synaptic vesicle cycling, with the responses varying between individual rats. Studying CDCrel-1, VMAT2, and other proteins in large groups of outbred rats can help define individual genetic and molecular differences in responses to METH neurotoxicity which, in turn, will aid treating humans suffering from METH use disorder and its neurological consequences.
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Affiliation(s)
- Heli Chauhan
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Ave, Detroit, MI, USA 48201
| | - Nick Carruthers
- Institute of Environmental Health Sciences and Proteomics Core Facility, 540 East Canfield Ave., Detroit, MI 48202
| | - Paul Stemmer
- Institute of Environmental Health Sciences and Proteomics Core Facility, 540 East Canfield Ave., Detroit, MI 48202
| | - Bernard P. Schneider
- Brain Mind Institute École Polytechnique Fédérale de Lausanne School of Life Sciences, Ch. Des Mines, 9, CH-1202 Geneve, Switzerland
| | - Anna Moszczynska
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Ave, Detroit, MI, USA 48201
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2
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Bonet-Aleta J, Encinas-Gimenez M, Oi M, Pezacki AT, Sebastian V, de Martino A, Martín-Pardillos A, Martin-Duque P, Hueso JL, Chang CJ, Santamaria J. Nanomedicine Targeting Cuproplasia in Cancer: Labile Copper Sequestration Using Polydopamine Particles Blocks Tumor Growth In Vivo through Altering Metabolism and Redox Homeostasis. ACS APPLIED MATERIALS & INTERFACES 2024; 16:29844-29855. [PMID: 38829261 PMCID: PMC11181271 DOI: 10.1021/acsami.4c04336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/17/2024] [Accepted: 05/17/2024] [Indexed: 06/05/2024]
Abstract
Copper plays critical roles as a metal active site cofactor and metalloallosteric signal for enzymes involved in cell proliferation and metabolism, making it an attractive target for cancer therapy. In this study, we investigated the efficacy of polydopamine nanoparticles (PDA NPs), classically applied for metal removal from water, as a therapeutic strategy for depleting intracellular labile copper pools in triple-negative breast cancer models through the metal-chelating groups present on the PDA surface. By using the activity-based sensing probe FCP-1, we could track the PDA-induced labile copper depletion while leaving total copper levels unchanged and link it to the selective MDA-MB-231 cell death. Further mechanistic investigations revealed that PDA NPs increased reactive oxygen species (ROS) levels, potentially through the inactivation of superoxide dismutase 1 (SOD1), a copper-dependent antioxidant enzyme. Additionally, PDA NPs were found to interact with the mitochondrial membrane, resulting in an increase in the mitochondrial membrane potential, which may contribute to enhanced ROS production. We employed an in vivo tumor model to validate the therapeutic efficacy of PDA NPs. Remarkably, in the absence of any additional treatment, the presence of PDA NPs alone led to a significant reduction in tumor volume by a factor of 1.66 after 22 days of tumor growth. Our findings highlight the potential of PDA NPs as a promising therapeutic approach for selectively targeting cancer by modulating copper levels and inducing oxidative stress, leading to tumor growth inhibition as shown in these triple-negative breast cancer models.
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Affiliation(s)
- Javier Bonet-Aleta
- Instituto
de Nanociencia y Materiales de Aragon (INMA) CSIC, Universidad de Zaragoza, Campus Rio Ebro, Edificio I+D, C/Poeta Mariano Esquillor, s/n, 50018 Zaragoza, Spain
- Networking
Res. Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department
of Chemical and Environmental Engineering, University of Zaragoza, Campus Rio Ebro, C/María de Luna, 3, 50018 Zaragoza, Spain
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Miguel Encinas-Gimenez
- Instituto
de Nanociencia y Materiales de Aragon (INMA) CSIC, Universidad de Zaragoza, Campus Rio Ebro, Edificio I+D, C/Poeta Mariano Esquillor, s/n, 50018 Zaragoza, Spain
- Networking
Res. Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department
of Chemical and Environmental Engineering, University of Zaragoza, Campus Rio Ebro, C/María de Luna, 3, 50018 Zaragoza, Spain
- Instituto
de Investigación Sanitaria (IIS) de Aragón, Avenida San Juan Bosco, 13, 50009 Zaragoza, Spain
| | - Miku Oi
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Aidan T. Pezacki
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Victor Sebastian
- Instituto
de Nanociencia y Materiales de Aragon (INMA) CSIC, Universidad de Zaragoza, Campus Rio Ebro, Edificio I+D, C/Poeta Mariano Esquillor, s/n, 50018 Zaragoza, Spain
- Networking
Res. Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department
of Chemical and Environmental Engineering, University of Zaragoza, Campus Rio Ebro, C/María de Luna, 3, 50018 Zaragoza, Spain
- Instituto
de Investigación Sanitaria (IIS) de Aragón, Avenida San Juan Bosco, 13, 50009 Zaragoza, Spain
| | - Alba de Martino
- Instituto
Aragonés de Ciencias de la Salud (IACS), Instituto de Investigación Sanitaria Aragón (IIS-Aragón), Edificio CIBA. Avenida San Juan
Bosco 13, planta 1, 50009 Zaragoza, Spain
| | - Ana Martín-Pardillos
- Instituto
de Nanociencia y Materiales de Aragon (INMA) CSIC, Universidad de Zaragoza, Campus Rio Ebro, Edificio I+D, C/Poeta Mariano Esquillor, s/n, 50018 Zaragoza, Spain
- Networking
Res. Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department
of Chemical and Environmental Engineering, University of Zaragoza, Campus Rio Ebro, C/María de Luna, 3, 50018 Zaragoza, Spain
- Instituto
de Investigación Sanitaria (IIS) de Aragón, Avenida San Juan Bosco, 13, 50009 Zaragoza, Spain
| | - Pilar Martin-Duque
- Instituto
de Investigación Sanitaria (IIS) de Aragón, Avenida San Juan Bosco, 13, 50009 Zaragoza, Spain
- Departamento
de Desarrollo de Medicamentos y Terapias Avanzadas, Instituto de Salud Carlos III, Ctra. de Pozuelo, 28, 28222, Majadahonda Madrid, Spain
| | - Jose L. Hueso
- Instituto
de Nanociencia y Materiales de Aragon (INMA) CSIC, Universidad de Zaragoza, Campus Rio Ebro, Edificio I+D, C/Poeta Mariano Esquillor, s/n, 50018 Zaragoza, Spain
- Networking
Res. Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department
of Chemical and Environmental Engineering, University of Zaragoza, Campus Rio Ebro, C/María de Luna, 3, 50018 Zaragoza, Spain
- Instituto
de Investigación Sanitaria (IIS) de Aragón, Avenida San Juan Bosco, 13, 50009 Zaragoza, Spain
| | - Christopher J. Chang
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Department
of Molecular and Cell Biology, University
of California, Berkeley, California 94720, United States
- Helen
Willis Neuroscience Institute, University
of California, Berkeley, California 94720, United States
| | - Jesus Santamaria
- Instituto
de Nanociencia y Materiales de Aragon (INMA) CSIC, Universidad de Zaragoza, Campus Rio Ebro, Edificio I+D, C/Poeta Mariano Esquillor, s/n, 50018 Zaragoza, Spain
- Networking
Res. Center in Biomaterials, Bioengineering and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department
of Chemical and Environmental Engineering, University of Zaragoza, Campus Rio Ebro, C/María de Luna, 3, 50018 Zaragoza, Spain
- Instituto
de Investigación Sanitaria (IIS) de Aragón, Avenida San Juan Bosco, 13, 50009 Zaragoza, Spain
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3
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Iuzzolino A, Pellegrini FR, Rotili D, Degrassi F, Trisciuoglio D. The α-tubulin acetyltransferase ATAT1: structure, cellular functions, and its emerging role in human diseases. Cell Mol Life Sci 2024; 81:193. [PMID: 38652325 PMCID: PMC11039541 DOI: 10.1007/s00018-024-05227-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/29/2024] [Accepted: 04/03/2024] [Indexed: 04/25/2024]
Abstract
The acetylation of α-tubulin on lysine 40 is a well-studied post-translational modification which has been associated with the presence of long-lived stable microtubules that are more resistant to mechanical breakdown. The discovery of α-tubulin acetyltransferase 1 (ATAT1), the enzyme responsible for lysine 40 acetylation on α-tubulin in a wide range of species, including protists, nematodes, and mammals, dates to about a decade ago. However, the role of ATAT1 in different cellular activities and molecular pathways has been only recently disclosed. This review comprehensively summarizes the most recent knowledge on ATAT1 structure and substrate binding and analyses the involvement of ATAT1 in a variety of cellular processes such as cell motility, mitosis, cytoskeletal organization, and intracellular trafficking. Finally, the review highlights ATAT1 emerging roles in human diseases and discusses ATAT1 potential enzymatic and non-enzymatic roles and the current efforts in developing ATAT1 inhibitors.
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Affiliation(s)
- Angela Iuzzolino
- IBPM Institute of Molecular Biology and Pathology, CNR National Research Council of Italy, Via degli Apuli 4, Rome, 00185, Italy
| | - Francesca Romana Pellegrini
- IBPM Institute of Molecular Biology and Pathology, CNR National Research Council of Italy, Via degli Apuli 4, Rome, 00185, Italy
| | - Dante Rotili
- Department of Drug Chemistry & Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, Rome, 00185, Italy
| | - Francesca Degrassi
- IBPM Institute of Molecular Biology and Pathology, CNR National Research Council of Italy, Via degli Apuli 4, Rome, 00185, Italy.
| | - Daniela Trisciuoglio
- IBPM Institute of Molecular Biology and Pathology, CNR National Research Council of Italy, Via degli Apuli 4, Rome, 00185, Italy.
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4
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Jeong J, Kim OH, Shim J, Keum S, Hwang YE, Song S, Kim JW, Choi JH, Lee HJ, Rhee S. Microtubule acetylation induced by oxidative stress regulates subcellular distribution of lysosomal vesicles for amyloid-beta secretion. J Cell Physiol 2023; 238:2812-2826. [PMID: 37801327 DOI: 10.1002/jcp.31131] [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: 05/07/2023] [Revised: 09/04/2023] [Accepted: 09/19/2023] [Indexed: 10/07/2023]
Abstract
Excessive production and accumulation of amyloid-beta (Aβ) in the brain are one of the hallmarks of Alzheimer's disease (AD). Although oxidative stress is known to trigger and promote the progression of AD, the molecular relationship between oxidative stress and Aβ production is not yet fully understood. In this study, we demonstrate that microtubule acetylation induced by oxidative stress plays a critical role in Aβ production and secretion by altering the subcellular distribution of Aβ precursor protein (APP)-containing lysosomal vesicles. Under oxidative stress, both H4-APPSwe/Ind and HEK293T-APPSwe/Ind cell lines showed increased microtubule acetylation and Aβ secretion. Knockdown (KD) of alpha-tubulin N-acetyltransferase 1 (ATAT1) by using a lentiviral shRNA not only inhibited the generation of intermediate APP fragments, such as β-CTF and AICD, but also suppressed Aβ secretion. Oxidative stress promoted the dispersion of LAMP1-positive vesicles to the periphery of the cell through microtubule acetylation, leading to the formation of neutralized lysosomal vesicles (NLVs), which was inhibited by ATAT1 KD. Treatment of the cells with the dynein ATPase inhibitor EHNA or downregulation of LIS1, a regulator of dynein-mediated intracellular transport, increased the peripheral localization of NLVs and promoted Aβ secretion, whereas KD of ADP ribosylation factor like GTPase 8B showed the opposite result. ATAT1 KD in the hippocampal region of the 5×FAD AD mouse model also showed significant reductions in Aβ plaque accumulation and memory loss. Taken together, these findings suggest that oxidative stress-induced microtubule acetylation promotes the peripheral localization of lysosomal vesicles to form NLVs, thereby enhancing Aβ secretion.
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Affiliation(s)
- Jangho Jeong
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Ok-Hyeon Kim
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
| | - Jaeyeoung Shim
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Seula Keum
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Ye Eun Hwang
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Seongeun Song
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Jung-Woong Kim
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Jee-Hye Choi
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Hyun Jung Lee
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul, Republic of Korea
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Republic of Korea
| | - Sangmyung Rhee
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
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5
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Yue Y, Hotta T, Higaki T, Verhey KJ, Ohi R. Microtubule detyrosination by VASH1/SVBP is regulated by the conformational state of tubulin in the lattice. Curr Biol 2023; 33:4111-4123.e7. [PMID: 37716348 PMCID: PMC10592207 DOI: 10.1016/j.cub.2023.07.062] [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] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 09/18/2023]
Abstract
Tubulin, a heterodimer of α- and β-tubulin, is a GTPase that assembles into microtubule (MT) polymers whose dynamic properties are intimately coupled to nucleotide hydrolysis. In cells, the organization and dynamics of MTs are further tuned by post-translational modifications (PTMs), which control the ability of MT-associated proteins (MAPs) and molecular motors to engage MTs. Detyrosination is a PTM of α-tubulin, wherein its C-terminal tyrosine residue is enzymatically removed by either the vasohibin (VASH) or MT-associated tyrosine carboxypeptidase (MATCAP) peptidases. How these enzymes generate specific patterns of MT detyrosination in cells is not known. Here, we use a novel antibody-based probe to visualize the formation of detyrosinated MTs in real time and employ single-molecule imaging of VASH1 bound to its regulatory partner small-vasohibin binding protein (SVBP) to understand the process of MT detyrosination in vitro and in cells. We demonstrate that the activity, but not binding, of VASH1/SVBP is much greater on mimics of guanosine triphosphate (GTP)-MTs than on guanosine diphosphate (GDP)-MTs. Given emerging data showing that tubulin subunits in GTP-MTs are in expanded conformation relative to tubulin subunits in GDP-MTs, we reasoned that the lattice conformation of MTs is a key factor that gates the activity of VASH1/SVBP. We show that Taxol, a drug known to expand the MT lattice, promotes MT detyrosination and that CAMSAP2 and CAMSAP3 are two MAPs that spatially regulate detyrosination in cells. Collectively, our work shows that VASH1/SVBP detyrosination is regulated by the conformational state of tubulin in the MT lattice and that this is spatially determined in cells by the activity of MAPs.
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Affiliation(s)
- Yang Yue
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Takashi Hotta
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Takumi Higaki
- Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan; International Research Organization in Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
| | - Kristen J Verhey
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Ryoma Ohi
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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6
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Carmona B, Marinho HS, Matos CL, Nolasco S, Soares H. Tubulin Post-Translational Modifications: The Elusive Roles of Acetylation. BIOLOGY 2023; 12:biology12040561. [PMID: 37106761 PMCID: PMC10136095 DOI: 10.3390/biology12040561] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023]
Abstract
Microtubules (MTs), dynamic polymers of α/β-tubulin heterodimers found in all eukaryotes, are involved in cytoplasm spatial organization, intracellular transport, cell polarity, migration and division, and in cilia biology. MTs functional diversity depends on the differential expression of distinct tubulin isotypes and is amplified by a vast number of different post-translational modifications (PTMs). The addition/removal of PTMs to α- or β-tubulins is catalyzed by specific enzymes and allows combinatory patterns largely enriching the distinct biochemical and biophysical properties of MTs, creating a code read by distinct proteins, including microtubule-associated proteins (MAPs), which allow cellular responses. This review is focused on tubulin-acetylation, whose cellular roles continue to generate debate. We travel through the experimental data pointing to α-tubulin Lys40 acetylation role as being a MT stabilizer and a typical PTM of long lived MTs, to the most recent data, suggesting that Lys40 acetylation enhances MT flexibility and alters the mechanical properties of MTs, preventing MTs from mechanical aging characterized by structural damage. Additionally, we discuss the regulation of tubulin acetyltransferases/desacetylases and their impacts on cell physiology. Finally, we analyze how changes in MT acetylation levels have been found to be a general response to stress and how they are associated with several human pathologies.
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Affiliation(s)
- Bruno Carmona
- Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
| | - H Susana Marinho
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Catarina Lopes Matos
- Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Sofia Nolasco
- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal
| | - Helena Soares
- Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
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7
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Singh J, Sanghavi P, Mallik R. Microtubule motor driven interactions of lipid droplets: Specificities and opportunities. Front Cell Dev Biol 2022; 10:893375. [PMID: 36200039 PMCID: PMC9527339 DOI: 10.3389/fcell.2022.893375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 09/05/2022] [Indexed: 11/29/2022] Open
Abstract
Lipid Droplets (LDs) are evolutionarily conserved cellular organelles that store neutral lipids such as triacylglycerol and cholesterol-esters. Neutral lipids are enclosed within the limiting membrane of the LD, which is a monolayer of phospholipids and is therefore fundamentally different from the bilayer membrane enclosing most other organelles. LDs have long been viewed as a storehouse of lipids needed on demand for generating energy and membranes inside cells. Outside this classical view, we are now realizing that LDs have significant roles in protein sequestration, supply of signalling lipids, viral replication, lipoprotein production and many other functions of important physiological consequence. To execute such functions, LDs must often exchange lipids and proteins with other organelles (e.g., the ER, lysosomes, mitochondria) via physical contacts. But before such exchanges can occur, how does a micron-sized LD with limited ability to diffuse around find its cognate organelle? There is growing evidence that motor protein driven motion of LDs along microtubules may facilitate such LD-organelle interactions. We will summarize some aspects of LD motion leading to LD-organelle contacts, how these change with metabolic state and pathogen infections, and also ask how these pathways could perhaps be targeted selectively in the context of disease and drug delivery. Such a possibility arises because the binding of motor proteins to the monolayer membrane on LDs could be different from motor binding to the membrane on other cellular organelles.
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Affiliation(s)
- Jagjeet Singh
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
- *Correspondence: Roop Mallik, ; Jagjeet Singh,
| | - Paulomi Sanghavi
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
| | - Roop Mallik
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
- *Correspondence: Roop Mallik, ; Jagjeet Singh,
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8
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KIF17 maintains the epithelial phenotype of breast cancer cells and curbs tumour metastasis. Cancer Lett 2022; 548:215904. [PMID: 36089118 DOI: 10.1016/j.canlet.2022.215904] [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: 05/22/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 11/24/2022]
Abstract
Kinesin superfamily motor protein 17 (KIF17) was previously identified downregulated in breast cancer and correlated with patient prognosis. However, its pathophysiological role in tumours remains unknown. Here, we confirmed that KIF17 was significantly under-expressed in breast cancer tissues and low KIF17 expression correlated with poor outcomes in patients with breast cancer. In vitro and in vivo experiments demonstrated that KIF17 overexpression in breast cancer cell lines significantly inhibited breast cancer invasion and metastasis. By establishing the lung metastatic MDA-MB-231 cell lines, we found a transient silence of KIF17 during the initiation of breast cancer metastasis. Further experiments revealed that KIF17 might suppress metastasis by regulating the level of acetylated tubulin to maintain cytoskeleton stability. Eventually, we found that the low expression of KIF17 in breast cancer is regulated by DNMT1-mediated 5-mC DNA methylation and epigenetic silencing. Decitabine can effectively improve the expression level of KIF17 in breast cancer cells. Our study demonstrates that KIF17 mediates microtubule acetylation to maintain the stability of microtubules, thereby inhibiting tumour invasion and metastasis.
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9
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Lee SH, Hou JC, Hamidzadeh A, Yousafzai MS, Ajeti V, Chang H, Odde DJ, Murrell M, Levchenko A. A molecular clock controls periodically driven cell migration in confined spaces. Cell Syst 2022; 13:514-529.e10. [PMID: 35679858 DOI: 10.1016/j.cels.2022.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/10/2021] [Accepted: 05/13/2022] [Indexed: 01/25/2023]
Abstract
Navigation through a dense, physically confining extracellular matrix is common in invasive cell spread and tissue reorganization but is still poorly understood. Here, we show that this migration is mediated by cyclic changes in the activity of a small GTPase RhoA, which is dependent on the oscillatory changes in the activity and abundance of the RhoA guanine nucleotide exchange factor, GEF-H1, and triggered by a persistent increase in the intracellular Ca2+ levels. We show that the molecular clock driving these cyclic changes is mediated by two coupled negative feedback loops, dependent on the microtubule dynamics, with a frequency that can be experimentally modulated based on a predictive mathematical model. We further demonstrate that an increasing frequency of the clock translates into a faster cell migration within physically confining spaces. This work lays the foundation for a better understanding of the molecular mechanisms dynamically driving cell migration in complex environments.
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Affiliation(s)
- Sung Hoon Lee
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
| | - Jay C Hou
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Archer Hamidzadeh
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
| | - M Sulaiman Yousafzai
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA; Department of Physics, Yale University, New Haven, CT 06520, USA
| | - Visar Ajeti
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA; Department of Physics, Yale University, New Haven, CT 06520, USA; Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT 06032, USA
| | - Hao Chang
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
| | - David J Odde
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Michael Murrell
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA; Department of Physics, Yale University, New Haven, CT 06520, USA
| | - Andre Levchenko
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA.
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10
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Research Progress and Potential Applications of Spermidine in Ocular Diseases. Pharmaceutics 2022; 14:pharmaceutics14071500. [PMID: 35890394 PMCID: PMC9323341 DOI: 10.3390/pharmaceutics14071500] [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] [Received: 05/30/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 02/01/2023] Open
Abstract
Spermidine, a natural polyamine, exists in almost all human tissues, exhibiting broad properties like anti-aging, autophagy induction, anti-inflammation, anti-oxidation, cell proliferation activation, and ion channel regulation. Considering that spermidine is already present in human nutrition, recent studies targeting supplementing exogenous sources of this polyamine appear feasible. The protective role of spermidine in various systems has been illuminated in the literature, while recent progress of spermidine administration in ocular diseases remains to be clarified. This study shows the current landscape of studies on spermidine and its potential to become a promising therapeutic agent to treat ocular diseases: glaucoma, optic nerve injury, age-related macular degeneration (AMD), cataracts, dry eye syndrome, and bacterial keratitis. It also has the potential to become a potent biomarker to predict keratoconus (KC), cataracts, uveitis, glaucoma, proliferative diabetic retinopathy (PDR), proliferative vitreoretinopathy (PVR), and retinopathy of prematurity (ROP). We also summarize the routes of administration and the effects of spermidine at different doses.
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11
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The Role of Runx2 in Microtubule Acetylation in Bone Metastatic Breast Cancer Cells. Cancers (Basel) 2022; 14:cancers14143436. [PMID: 35884497 PMCID: PMC9323014 DOI: 10.3390/cancers14143436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/04/2022] [Accepted: 07/07/2022] [Indexed: 12/10/2022] Open
Abstract
Bone metastasis of breast cancer results in severe bone loss, fractures, and death. Crosstalk between breast cancer cells and bone resident cells promotes osteoclast activity and the release of growth factors from the bone matrix resulting in aggressive tumor growth and bone loss. We and others have shown that Runt-related transcription factor-2 (Runx2) promotes metastatic tumor growth-associated bone loss. Breast cancer cells also induce autophagy to survive metabolic stress at the metastatic site. Recently, we reported a Runx2-dependent increase in autophagy. In this study, to examine the underlying mechanisms of metastasis and tumor resistance to stress, we used a bone metastatic isogenic variant of breast cancer MDA-MB-231 cells isolated from a xenograft tumor mouse model of metastasis. Our results with immunofluorescence and biochemical approaches revealed that Runx2 promotes microtubule (MT) stability to facilitate autophagy. Stable MTs are critical for autophagosome trafficking and display increased acetylation at Lysine 40 of α-tubulin. Runx2 silencing decreases acetylated α-tubulin levels. The expression levels of HDAC6 and αTAT1, which serve to regulate the acetylation of α-tubulin, were not altered with Runx2 silencing. We found that HDAC6 interaction with α-tubulin is inhibited by Runt-related factor-2 (Runx2). We show that the expression of wild-type Runx2 can restore the acetylated polymer of MTs in Runx2 knockdown cells, while the C-terminal deletion mutant fails to rescue the polymer of MTs. Importantly, cellular stress, such as glucose starvation also increases the acetylation of α-tubulin. We found that the loss of Runx2 increases the sensitivity of breast cancer cells to MT-targeting agents. Overall, our results indicate a novel regulatory mechanism of microtubule acetylation and suggest that Runx2 and acetylated microtubules may serve as therapeutic targets for bone metastatic tumors.
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12
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Neuman MG, Seitz HK, Tuma PL, Osna NA, Casey CA, Kharbanda KK, Cohen LB, Malnick SDH, Adhikari R, Mitra R, Dagur RS, Ganesan M, Srinivas C, Madan Kumar A, New-Aaron M, Poluektova L, Thomes PG, Rasineni K, Opris M, Teschke R. Alcohol: basic and translational research; 15th annual Charles Lieber &1st Samuel French satellite symposium. Exp Mol Pathol 2022; 126:104750. [PMID: 35192844 PMCID: PMC9167794 DOI: 10.1016/j.yexmp.2022.104750] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/28/2021] [Accepted: 01/24/2022] [Indexed: 02/05/2023]
Abstract
The present review is based on the research presented at the symposium dedicated to the legacy of the two scientists that made important discoveries in the field of alcohol-induced liver damage: Professors C.S. Lieber and S.W. French. The invited speakers described pharmacological, toxicological and patho-physiological effects of alcohol misuse. Moreover, genetic biomarkers determining adverse drug reactions due to interactions between therapeutics used for chronic or infectious diseases and alcohol exposure were discussed. The researchers presented their work in areas of alcohol-induced impairment in lipid protein trafficking and endocytosis, as well as the role of lipids in the development of fatty liver. The researchers showed that alcohol leads to covalent modifications that promote hepatic dysfunction and injury. We concluded that using new advanced techniques and research ideas leads to important discoveries in science.
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Affiliation(s)
- Manuela G Neuman
- In Vitro Drug Safety and Biotechnology, Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada.
| | - Helmut K Seitz
- Centre of Liver and Alcohol Diseases, Ethianum Clinic, University of Heidelberg, Germany
| | - Pamela L Tuma
- The Catholic University of America, Department of Biology, Washington, DC 20064, USA
| | - Natalia A Osna
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Carol A Casey
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kusum K Kharbanda
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Lawrence B Cohen
- Division of Gastroenterology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Steve D H Malnick
- Department of Internal Medicine C, Kaplan Medical Center, Affiliated Hebrew University, Jerusalem, Israel
| | - Raghabendra Adhikari
- The Catholic University of America, Department of Biology, Washington, DC 20064, USA
| | - Ramyajit Mitra
- The Catholic University of America, Department of Biology, Washington, DC 20064, USA
| | - Raghubendra Singh Dagur
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Murali Ganesan
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Chava Srinivas
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Arumugam Madan Kumar
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Moses New-Aaron
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Larisa Poluektova
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Paul G Thomes
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Karuna Rasineni
- VA-Nebraska-Western Iowa Health Care System, Department of Veterans' Affairs, Omaha, NE, and Department of Internal Medicine, Section of Gastroenterology-Hepatology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Mihai Opris
- In Vitro Drug Safety and Biotechnology, Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada; Family Medicine Clinic CAR, Bucharest, Romania
| | - Rolf Teschke
- Department of Internal Medicine II, Division of Gastroenterology and Hepatology, Klinikum Hanau, Hanau, Academic Teaching Hospital of the Medical Faculty, Goethe University Frankfurt/ Main, Frankfurt/Main, Germany
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13
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You E, Jeong J, Lee J, Keum S, Hwang YE, Choi JH, Rhee S. Casein kinase 2 promotes the TGF-β-induced activation of α-tubulin acetyltransferase 1 in fibroblasts cultured on a soft matrix. BMB Rep 2022. [PMID: 35321783 PMCID: PMC9058472 DOI: 10.5483/bmbrep.2022.55.4.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cell signals for growth factors depend on the mechanical properties of the extracellular matrix (ECM) surrounding the cells. Microtubule acetylation is involved in the transforming growth factor (TGF)-β-induced myofibroblast differentiation in the soft ECM. However, the mechanism of activation of α-tubulin acetyltransferase 1 (α-TAT1), a major α-tubulin acetyltransferase, in the soft ECM is not well defined. Here, we found that casein kinase 2 (CK2) is required for the TGF-β-induced activation of α-TAT1 that promotes microtubule acetylation in the soft matrix. Genetic mutation and pharmacological inhibition of CK2 catalytic activity specifically reduced microtubule acetylation in the cells cultured on a soft matrix rather than those cultured on a stiff matrix. Immunoprecipitation analysis showed that CK2α, a catalytic subunit of CK2, directly bound to the C-terminal domain of α-TAT1, and this interaction was more prominent in the cells cultured on the soft matrix. Moreover, the substitution of alanine with serine, the 236th amino acid located at the C-terminus, which contains the CK2-binding site of α-TAT1, sig-nificantly abrogated the TGF-β-induced microtubule acetylation in the soft matrix, indicating that the successful binding of CK2 and the C-terminus of α-TAT1 led to the phosphorylation of serine at the 236th position of amino acids in α-TAT1 and regulation of its catalytic activity. Taken together, our findings provide novel insights into the molecular mechanisms underlying the TGF-β-induced activation of α-TAT1 in a soft matrix.
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Affiliation(s)
- Eunae You
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Jangho Jeong
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Jieun Lee
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Seula Keum
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Ye Eun Hwang
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Jee-Hye Choi
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Sangmyung Rhee
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
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14
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Glon D, Vilmen G, Perdiz D, Hernandez E, Beauclair G, Quignon F, Berlioz-Torrent C, Maréchal V, Poüs C, Lussignol M, Esclatine A. Essential role of hyperacetylated microtubules in innate immunity escape orchestrated by the EBV-encoded BHRF1 protein. PLoS Pathog 2022; 18:e1010371. [PMID: 35275978 PMCID: PMC8942261 DOI: 10.1371/journal.ppat.1010371] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/23/2022] [Accepted: 02/14/2022] [Indexed: 12/27/2022] Open
Abstract
Innate immunity constitutes the first line of defense against viruses, in which mitochondria play an important role in the induction of the interferon (IFN) response. BHRF1, a multifunctional viral protein expressed during Epstein-Barr virus reactivation, modulates mitochondrial dynamics and disrupts the IFN signaling pathway. Mitochondria are mobile organelles that move through the cytoplasm thanks to the cytoskeleton and in particular the microtubule (MT) network. MTs undergo various post-translational modifications, among them tubulin acetylation. In this study, we demonstrated that BHRF1 induces MT hyperacetylation to escape innate immunity. Indeed, the expression of BHRF1 induces the clustering of shortened mitochondria next to the nucleus. This "mito-aggresome" is organized around the centrosome and its formation is MT-dependent. We also observed that the α-tubulin acetyltransferase ATAT1 interacts with BHRF1. Using ATAT1 knockdown or a non-acetylatable α-tubulin mutant, we demonstrated that this hyperacetylation is necessary for the mito-aggresome formation. Similar results were observed during EBV reactivation. We investigated the mechanism leading to the clustering of mitochondria, and we identified dyneins as motors that are required for mitochondrial clustering. Finally, we demonstrated that BHRF1 needs MT hyperacetylation to block the induction of the IFN response. Moreover, the loss of MT hyperacetylation blocks the localization of autophagosomes close to the mito-aggresome, impeding BHRF1 to initiate mitophagy, which is essential to inhibiting the signaling pathway. Therefore, our results reveal the role of the MT network, and its acetylation level, in the induction of a pro-viral mitophagy.
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Affiliation(s)
- Damien Glon
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
| | - Géraldine Vilmen
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
- CRSA, Centre de Recherche Saint-Antoine, UMR-S 938, INSERM, Sorbonne Université, Paris, France
| | - Daniel Perdiz
- INSERM UMR-S 1193, Université Paris-Saclay, Châtenay-Malabry, France
| | - Eva Hernandez
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
| | - Guillaume Beauclair
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
| | - Frédérique Quignon
- Sorbonne Université, CNRS UMR 144, Institut Curie Centre de Recherche, Paris, France
| | | | - Vincent Maréchal
- CRSA, Centre de Recherche Saint-Antoine, UMR-S 938, INSERM, Sorbonne Université, Paris, France
| | - Christian Poüs
- INSERM UMR-S 1193, Université Paris-Saclay, Châtenay-Malabry, France
- Biochimie-Hormonologie, APHP, Hôpitaux Universitaires Paris-Saclay, Site Antoine Béclère, Clamart, France
| | - Marion Lussignol
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
| | - Audrey Esclatine
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
- * E-mail:
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15
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Bär J, Popp Y, Bucher M, Mikhaylova M. Direct and indirect effects of tubulin post-translational modifications on microtubule stability: Insights and regulations. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119241. [PMID: 35181405 DOI: 10.1016/j.bbamcr.2022.119241] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 01/28/2022] [Accepted: 01/28/2022] [Indexed: 12/17/2022]
Abstract
Microtubules (MTs) mediate various cellular functions such as structural support, chromosome segregation, and intracellular transport. To achieve this, the pivotal properties of MTs have to be changeable and tightly controlled. This is enabled by a high variety of tubulin posttranslational modifications, which influence MT properties directly, via altering the MT lattice structurally, or indirectly by changing MT interaction partners. Here, the distinction between these direct and indirect effects of MT PTMs are exemplified by acetylation of the luminal α-tubulin K40 resulting in decreased rigidity of MTs, and by MT detyrosination which decreases interaction with depolymerizing proteins, thus causing more stable MTs. We discuss how these PTMs are reversed and regulated, e.g. on the level of enzyme transcription, localization, and activity via various signalling pathways including the conventional calcium-dependent proteases calpains and how advances in microscopy techniques and development of live-sensors facilitate the understanding of MT PTM interaction and effects.
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Affiliation(s)
- Julia Bär
- RG Optobiology, Institute of Biology, Humboldt Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany; Guest Group "Neuronal Protein Transport", Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Falkenried 94, 20251 Hamburg, Germany.
| | - Yannes Popp
- RG Optobiology, Institute of Biology, Humboldt Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany; Guest Group "Neuronal Protein Transport", Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Falkenried 94, 20251 Hamburg, Germany.
| | - Michael Bucher
- RG Optobiology, Institute of Biology, Humboldt Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany; Guest Group "Neuronal Protein Transport", Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Falkenried 94, 20251 Hamburg, Germany.
| | - Marina Mikhaylova
- RG Optobiology, Institute of Biology, Humboldt Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany; Guest Group "Neuronal Protein Transport", Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Falkenried 94, 20251 Hamburg, Germany.
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16
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Abstract
Autophagy is an intracellular catabolic degradative process in which damaged cellular organelles, unwanted proteins and different cytoplasmic components get recycled to maintain cellular homeostasis or metabolic balance. During autophagy, a double membrane vesicle is formed to engulf these cytosolic materials and fuse to lysosomes wherein the entire cargo degrades to be used again. Because of this unique recycling ability of cells, autophagy is a universal stress response mechanism. Dysregulation of autophagy leads to several diseases, including cancer, neurodegeneration and microbial infection. Thus, autophagy machineries have become targets for therapeutics. This chapter provides an overview of the paradoxical role of autophagy in tumorigenesis in the perspective of metabolism.
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Affiliation(s)
- Sweta Sikder
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
| | - Atanu Mondal
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
- Homi Bhaba National Institute, Mumbai, India
| | - Chandrima Das
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
- Homi Bhaba National Institute, Mumbai, India
| | - Tapas K Kundu
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India.
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, India.
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17
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Ni YQ, Liu YS. New Insights into the Roles and Mechanisms of Spermidine in Aging and Age-Related Diseases. Aging Dis 2021; 12:1948-1963. [PMID: 34881079 PMCID: PMC8612618 DOI: 10.14336/ad.2021.0603] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 06/03/2021] [Indexed: 12/15/2022] Open
Abstract
High incidences of morbidity and mortality associated with age-related diseases among the elderly population are a socio-economic challenge. Aging is an irreversible and inevitable process that is a risk factor for pathological progression of diverse age-related diseases. Spermidine, a natural polyamine, plays a critical role in molecular and cellular interactions involved in various physiological and functional processes. Spermidine has been shown to modulate aging, suppress the occurrence and severity of age-related diseases, and prolong lifespan. However, the precise mechanisms through which spermidine exerts its anti-aging effects have not been established. In this review, we elucidate on the mechanisms and roles underlying the beneficial effects of spermidine in aging from a molecular and cellular perspective. Moreover, we provide new insights into the promising potential diagnostic and therapeutic applications of spermidine in aging and age-related diseases.
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Affiliation(s)
- Yu-Qing Ni
- 1Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.,2Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, China
| | - You-Shuo Liu
- 1Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.,2Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, China
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18
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Wang Z, Niu Y, Lei B, Yu L, Ke Z, Cao C, Wang R, Li J. Downhill Running Decreases the Acetylation of Tubulins and Impairs Autophagosome Degradation in Rat Skeletal Muscle. Med Sci Sports Exerc 2021; 53:2477-2484. [PMID: 34115728 DOI: 10.1249/mss.0000000000002728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE This study was designed to probe the effect of downhill running on microtubule acetylation and autophagic flux in rat skeletal muscle. METHODS Sprague-Dawley rats were subjected to an exercise protocol of a 90-min downhill run with a slope of -16° and a speed of 16 m·min-1, and then the soleus was sampled at 0, 12, 24, 48, and 72 h after exercise. Protein expression levels of microtubule-associated protein 1 light chain 3 (LC3), p62/sequestosome 1 (p62), α-tubulin, and acetylated α-tubulin (AcK40 α-tubulin) were detected by Western blotting. Alpha-tubulin was costained with AcK40 α-tubulin or cytoplasmic dynein intermediate chain in a single muscle fiber, and LC3 was costained with lysosomal-associated membrane protein 1 in cryosections. To assess autophagic flux in vivo, colchicine or vehicle was injected intraperitoneally 3 d before the exercise experiment, and the protein levels of LC3 and p62 were measured by Western blotting. RESULTS Downhill running induced a significant increase in the protein levels of LC3-II and p62, whereas the level and proportion of AcK40 α-tubulin were markedly decreased. Furthermore, the amount of dynein on α-tubulin was decreased after downhill running, and autophagosomes accumulated in the middle of myofibrils. Importantly, LC3-II flux was decreased after downhill running compared with that in the control group. CONCLUSIONS A bout of downhill running decreases microtubule acetylation, which may impair dynein recruitment and autophagosome transportation, causing blocked autophagic flux.
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Affiliation(s)
- Zhen Wang
- School of Sports Science, Beijing Sport University, Beijing, CHINA
| | | | - Bingkai Lei
- School of Sports Science, Beijing Sport University, Beijing, CHINA
| | - Liang Yu
- School of Sports Science, Beijing Sport University, Beijing, CHINA
| | - Zhifei Ke
- School of Sports Science, Beijing Sport University, Beijing, CHINA
| | - Chunxia Cao
- School of Sports Science, Beijing Sport University, Beijing, CHINA
| | - Ruiyuan Wang
- School of Sports Science, Beijing Sport University, Beijing, CHINA
| | - Junping Li
- School of Sports Science, Beijing Sport University, Beijing, CHINA
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19
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Saffi GT, Tang E, Mamand S, Inpanathan S, Fountain A, Salmena L, Botelho RJ. Reactive oxygen species prevent lysosome coalescence during PIKfyve inhibition. PLoS One 2021; 16:e0259313. [PMID: 34813622 PMCID: PMC8610251 DOI: 10.1371/journal.pone.0259313] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/16/2021] [Indexed: 11/19/2022] Open
Abstract
Lysosomes are terminal, degradative organelles of the endosomal pathway that undergo repeated fusion-fission cycles with themselves, endosomes, phagosomes, and autophagosomes. Lysosome number and size depends on balanced fusion and fission rates. Thus, conditions that favour fusion over fission can reduce lysosome numbers while enlarging their size. Conversely, favouring fission over fusion may cause lysosome fragmentation and increase their numbers. PIKfyve is a phosphoinositide kinase that generates phosphatidylinositol-3,5-bisphosphate to modulate lysosomal functions. PIKfyve inhibition causes an increase in lysosome size and reduction in lysosome number, consistent with lysosome coalescence. This is thought to proceed through reduced lysosome reformation and/or fission after fusion with endosomes or other lysosomes. Previously, we observed that photo-damage during live-cell imaging prevented lysosome coalescence during PIKfyve inhibition. Thus, we postulated that lysosome fusion and/or fission dynamics are affected by reactive oxygen species (ROS). Here, we show that ROS generated by various independent mechanisms all impaired lysosome coalescence during PIKfyve inhibition and promoted lysosome fragmentation during PIKfyve re-activation. However, depending on the ROS species or mode of production, lysosome dynamics were affected distinctly. H2O2 impaired lysosome motility and reduced lysosome fusion with phagosomes, suggesting that H2O2 reduces lysosome fusogenecity. In comparison, inhibitors of oxidative phosphorylation, thiol groups, glutathione, or thioredoxin, did not impair lysosome motility but instead promoted clearance of actin puncta on lysosomes formed during PIKfyve inhibition. Additionally, actin depolymerizing agents prevented lysosome coalescence during PIKfyve inhibition. Thus, we discovered that ROS can generally prevent lysosome coalescence during PIKfyve inhibition using distinct mechanisms depending on the type of ROS.
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Affiliation(s)
- Golam T. Saffi
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Evan Tang
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Sami Mamand
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Polytechnic Research Center, Erbil Polytechnic University, Kurdistan Regional Government, Erbil, Kurdistan
| | - Subothan Inpanathan
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Aaron Fountain
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Leonardo Salmena
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, Ontario, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Roberto J. Botelho
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
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20
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Waddell J, Banerjee A, Kristian T. Acetylation in Mitochondria Dynamics and Neurodegeneration. Cells 2021; 10:cells10113031. [PMID: 34831252 PMCID: PMC8616140 DOI: 10.3390/cells10113031] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 12/23/2022] Open
Abstract
Mitochondria are a unique intracellular organelle due to their evolutionary origin and multifunctional role in overall cellular physiology and pathophysiology. To meet the specific spatial metabolic demands within the cell, mitochondria are actively moving, dividing, or fusing. This process of mitochondrial dynamics is fine-tuned by a specific group of proteins and their complex post-translational modifications. In this review, we discuss the mitochondrial dynamics regulatory enzymes, their adaptor proteins, and the effect of acetylation on the activity of fusion and fission machinery as a ubiquitous response to metabolic stresses. Further, we discuss the role of intracellular cytoskeleton structures and their post-translational modifications in the modulation of mitochondrial fusion and fission. Finally, we review the role of mitochondrial dynamics dysregulation in the pathophysiology of acute brain injury and the treatment strategies based on modulation of NAD+-dependent deacetylation.
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Affiliation(s)
- Jaylyn Waddell
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; (J.W.); (A.B.)
| | - Aditi Banerjee
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; (J.W.); (A.B.)
| | - Tibor Kristian
- Veterans Affairs Maryland Health Center System, 10 North Greene Street, Baltimore, MD 21201, USA
- Department of Anesthesiology and the Center for Shock, Trauma, and Anesthesiology Research (S.T.A.R.), University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Correspondence: ; Tel.: +1-410-706-3418
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21
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The Aneugenicity of Ketone Bodies in Colon Epithelial Cells Is Mediated by Microtubule Hyperacetylation and Is Blocked by Resveratrol. Int J Mol Sci 2021; 22:ijms22179397. [PMID: 34502304 PMCID: PMC8430621 DOI: 10.3390/ijms22179397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 01/23/2023] Open
Abstract
Diabetes mellitus (DM) is considered to be associated with an increased risk of colorectal cancer. Recent studies have also revealed that tubulin hyperacetylation is caused by a diabetic status and we have reported previously that, under microtubule hyperacetylation, a microtubule severing protein, katanin-like (KL) 1, is upregulated and contributes to tumorigenesis. To further explore this phenomenon, we tested the effects of the ketone bodies, acetoacetate and β-hydroxybutyrate, in colon and fibroblast cells. Both induced microtubule hyperacetylation that responded differently to a histone deacetylase 3 knockdown. These two ketone bodies also generated intracellular reactive oxygen species (ROS) and hyperacetylation was commonly inhibited by ROS inhibitors. In a human fibroblast-based microtubule sensitivity test, only the KL1 human katanin family member showed activation by both ketone bodies. In primary cultured colon epithelial cells, these ketone bodies reduced the tau protein level and induced KL1- and α-tubulin acetyltransferase 1 (ATAT1)-dependent micronucleation. Resveratrol, known for its tumor preventive and tubulin deacetylation effects, inhibited this micronucleation. Our current data thus suggest that the microtubule hyperacetylation induced by ketone bodies may be a causal factor linking DM to colorectal carcinogenesis and may also represent an adverse effect of them that needs to be controlled if they are used as therapeutics.
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22
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More MP, Pardeshi SR, Pardeshi CV, Sonawane GA, Shinde MN, Deshmukh PK, Naik JB, Kulkarni AD. Recent advances in phytochemical-based Nano-formulation for drug-resistant Cancer. MEDICINE IN DRUG DISCOVERY 2021. [DOI: 10.1016/j.medidd.2021.100082] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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23
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Chang E, Bu J, Ding L, Lou JWH, Valic MS, Cheng MHY, Rosilio V, Chen J, Zheng G. Porphyrin-lipid stabilized paclitaxel nanoemulsion for combined photodynamic therapy and chemotherapy. J Nanobiotechnology 2021; 19:154. [PMID: 34034749 PMCID: PMC8147067 DOI: 10.1186/s12951-021-00898-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/15/2021] [Indexed: 01/09/2023] Open
Abstract
Background Porphyrin-lipids are versatile building blocks that enable cancer theranostics and have been applied to create several multimodal nanoparticle platforms, including liposome-like porphysome (aqueous-core), porphyrin nanodroplet (liquefied gas-core), and ultrasmall porphyrin lipoproteins. Here, we used porphyrin-lipid to stabilize the water/oil interface to create porphyrin-lipid nanoemulsions with paclitaxel loaded in the oil core (PLNE-PTX), facilitating combination photodynamic therapy (PDT) and chemotherapy in one platform. Results PTX (3.1 wt%) and porphyrin (18.3 wt%) were loaded efficiently into PLNE-PTX, forming spherical core–shell nanoemulsions with a diameter of 120 nm. PLNE-PTX demonstrated stability in systemic delivery, resulting in high tumor accumulation (~ 5.4 ID %/g) in KB-tumor bearing mice. PLNE-PTX combination therapy inhibited tumor growth (78%) in an additive manner, compared with monotherapy PDT (44%) or chemotherapy (46%) 16 days post-treatment. Furthermore, a fourfold reduced PTX dose (1.8 mg PTX/kg) in PLNE-PTX combination therapy platform demonstrated superior therapeutic efficacy to Taxol at a dose of 7.2 mg PTX/kg, which can reduce side effects. Moreover, the intrinsic fluorescence of PLNE-PTX enabled real-time tracking of nanoparticles to the tumor, which can help inform treatment planning. Conclusion PLNE-PTX combining PDT and chemotherapy in a single platform enables superior anti-tumor effects and holds potential to reduce side effects associated with monotherapy chemotherapy. The inherent imaging modality of PLNE-PTX enables real-time tracking and permits spatial and temporal regulation to improve cancer treatment. Graphic Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12951-021-00898-1.
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Affiliation(s)
- Enling Chang
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada.,Institute of Biomedical Engineering, University of Toronto, PMCRT 5-354, 101 College Street, Toronto, ON, M5G 1L7, Canada
| | - Jiachuan Bu
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada
| | - Lili Ding
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada
| | - Jenny W H Lou
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Michael S Valic
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada.,Institute of Biomedical Engineering, University of Toronto, PMCRT 5-354, 101 College Street, Toronto, ON, M5G 1L7, Canada
| | - Miffy H Y Cheng
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada
| | - Véronique Rosilio
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS, Châtenay-Malabry, France
| | - Juan Chen
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada.
| | - Gang Zheng
- Princess Margaret Cancer Centre, University Health Network, PMCRT 5-353, 101 College Street, Toronto, ON, M5G 1L7, Canada. .,Institute of Biomedical Engineering, University of Toronto, PMCRT 5-354, 101 College Street, Toronto, ON, M5G 1L7, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, Canada.
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24
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Hać A, Pierzynowska K, Herman-Antosiewicz A. S6K1 Is Indispensible for Stress-Induced Microtubule Acetylation and Autophagic Flux. Cells 2021; 10:929. [PMID: 33920542 PMCID: PMC8073773 DOI: 10.3390/cells10040929] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/09/2021] [Accepted: 04/13/2021] [Indexed: 12/19/2022] Open
Abstract
Autophagy is a specific macromolecule and organelle degradation process. The target macromolecule or organelle is first enclosed in an autophagosome, and then delivered along acetylated microtubules to the lysosome. Autophagy is triggered by stress and largely contributes to cell survival. We have previously shown that S6K1 kinase is essential for autophagic flux under stress conditions. Here, we aimed to elucidate the underlying mechanism of S6K1 involvement in autophagy. We stimulated autophagy in S6K1/2 double-knockout mouse embryonic fibroblasts by exposing them to different stress conditions. Transient gene overexpression or silencing, immunoblotting, immunofluorescence, flow cytometry, and ratiometric fluorescence analyses revealed that the perturbation of autophagic flux in S6K1-deficient cells did not stem from impaired lysosomal function. Instead, the absence of S6K1 abolished stress-induced tubulin acetylation and disrupted the acetylated microtubule network, in turn impairing the autophagosome-lysosome fusion. S6K1 overexpression restored tubulin acetylation and autophagic flux in stressed S6K1/2-deficient cells. Similar effect of S6K1 status was observed in prostate cancer cells. Furthermore, overexpression of an acetylation-mimicking, but not acetylation-resistant, tubulin variant effectively restored autophagic flux in stressed S6K1/2-deficient cells. Collectively, S6K1 controls tubulin acetylation, hence contributing to the autophagic flux induced by different stress conditions and in different cells.
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Affiliation(s)
- Aleksandra Hać
- Department of Medical Biology and Genetics, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland
| | - Karolina Pierzynowska
- Department of Molecular Biology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland
| | - Anna Herman-Antosiewicz
- Department of Medical Biology and Genetics, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland
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25
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Sun J, Tai S, Tang L, Yang H, Chen M, Xiao Y, Li X, Zhu Z, Zhou S. Acetylation Modification During Autophagy and Vascular Aging. Front Physiol 2021; 12:598267. [PMID: 33828486 PMCID: PMC8019697 DOI: 10.3389/fphys.2021.598267] [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: 08/24/2020] [Accepted: 02/26/2021] [Indexed: 12/11/2022] Open
Abstract
Vascular aging plays a pivotal role in the morbidity and mortality of elderly people. Decrease in autophagy leads to acceleration of vascular aging, while increase in autophagy leads to deceleration of vascular aging. And emerging evidence indicates that acetylation plays an important role in autophagy regulation; therefore, recent research has focused on an in-depth analysis of the mechanisms underlying this regulation. In this review, current knowledge on the role of acetylation of autophagy-related proteins and the mechanisms by which acetylation including non-autophagy-related acetylation and autophagy related acetylation regulate vascular aging have been discussed. We conclude that the occurrence of acetylation modification during autophagy is a fundamental mechanism underlying autophagy regulation and provides promising targets to retard vascular aging.
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Affiliation(s)
- Jiaxing Sun
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Shi Tai
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Liang Tang
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Hui Yang
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Mingxian Chen
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Yichao Xiao
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Xuping Li
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Zhaowei Zhu
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Shenghua Zhou
- Department of Cardiology, The Second Xiangya Hospital of Central South University, Changsha, China
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26
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Henrie H, Bakhos-Douaihy D, Cantaloube I, Pilon A, Talantikite M, Stoppin-Mellet V, Baillet A, Poüs C, Benoit B. Stress-induced phosphorylation of CLIP-170 by JNK promotes microtubule rescue. J Cell Biol 2021; 219:151834. [PMID: 32491151 PMCID: PMC7337496 DOI: 10.1083/jcb.201909093] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/17/2020] [Accepted: 04/20/2020] [Indexed: 01/01/2023] Open
Abstract
The stress-induced c-Jun N-terminal kinase (JNK) controls microtubule dynamics by enhancing both microtubule growth and rescues. Here, we show that upon cell stress, JNK directly phosphorylates the microtubule rescue factor CLIP-170 in its microtubule-binding domain to increase its rescue-promoting activity. Phosphomimetic versions of CLIP-170 enhance its ability to promote rescue events in vitro and in cells. Furthermore, while phosphomimetic mutations do not alter CLIP-170’s capability to form comets at growing microtubule ends, both phosphomimetic mutations and JNK activation increase the occurrence of CLIP-170 remnants on the microtubule lattice at the rear of comets. As the CLIP-170 remnants, which are potential sites of microtubule rescue, display a shorter lifetime when CLIP-170 is phosphorylated, we propose that instead of acting at the time of rescue occurrence, CLIP-170 would rather contribute in preparing the microtubule lattice for future rescues at these predetermined sites.
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Affiliation(s)
- Hélène Henrie
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France
| | - Dalal Bakhos-Douaihy
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France
| | - Isabelle Cantaloube
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France
| | - Antoine Pilon
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France.,Département de Biochimie, Hormonologie et Suivi Thérapeutique, Département Médico-Universitaire BioGeM, Assistance Publique - Hôpitaux de Paris Sorbonne Université, Paris, France
| | - Maya Talantikite
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France
| | - Virginie Stoppin-Mellet
- Grenoble Institut des Neurosciences, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1216, Université Grenoble Alpes, Grenoble, France
| | - Anita Baillet
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France
| | - Christian Poüs
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France.,Biochimie-Hormonologie, Assistance Publique - Hôpitaux de Paris Université Paris-Saclay, Clamart, France
| | - Béatrice Benoit
- Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1193, Châtenay-Malabry, France
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27
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Expression of α-Tubulin Acetyltransferase 1 and Tubulin Acetylation as Selective Forces in Cell Competition. Cells 2021; 10:cells10020390. [PMID: 33672816 PMCID: PMC7918103 DOI: 10.3390/cells10020390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/19/2021] [Accepted: 02/09/2021] [Indexed: 12/23/2022] Open
Abstract
The wound healing response of fibroblasts critically depends on the primary cilium, a sensory organelle protruding into the environment and comprising a stable axonemal structure. A characteristic marker for primary cilia is acetylation of axonemal tubulin. Although formation of primary cilia is under cell cycle control, the environmental cues affecting ciliation are not fully understood. Our purpose was, therefore, to study the impact of culture conditions on cilia formation in NIH3T3 fibroblasts. We quantified ciliation in different NIH3T3 sub-cell lines and culture conditions by immunodetection of primary cilia and counting. Quantitative Western blotting, qRT-PCR, and proliferation assays completed our investigation. We observed large differences between NIH3T3 sub-cell lines in their ability to generate acetylated primary cilia that correlated with cytoplasmic tubulin acetylation. We found no increased activity of the major tubulin deacetylase, HDAC6, but instead reduced expression of the α-tubulin acetyltransferase 1 (Atat1) as being causative. Our observations demonstrate that cells with reduced expression of Atat1 and tubulin acetylation proliferate faster, eventually displacing all other cells in the population. Expression of Atat1 and tubulin acetylation are therefore selective forces in cell competition.
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28
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PAK1 Regulates MEC-17 Acetyltransferase Activity and Microtubule Acetylation during Proplatelet Extension. Int J Mol Sci 2020; 21:ijms21207531. [PMID: 33066011 PMCID: PMC7589885 DOI: 10.3390/ijms21207531] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 02/06/2023] Open
Abstract
Mature megakaryocytes extend long processes called proplatelets from which platelets are released in the blood stream. The Rho GTPases Cdc42 and Rac as well as their downstream target, p21-activated kinase 2 (PAK2), have been demonstrated to be important for platelet formation. Here we address the role, during platelet formation, of PAK1, another target of the Rho GTPases. PAK1 decorates the bundled microtubules (MTs) of megakaryocyte proplatelets. Using a validated cell model which recapitulates proplatelet formation, elongation and platelet release, we show that lack of PAK1 activity increases the number of proplatelets but restrains their elongation. Moreover, in the absence of PAK1 activity, cells have hyperacetylated MTs and lose their MT network integrity. Using inhibitors of the tubulin deacetylase HDAC6, we demonstrate that abnormally high levels of MT acetylation are not sufficient to increase the number of proplatelets but cause loss of MT integrity. Taken together with our previous demonstration that MT acetylation is required for proplatelet formation, our data reveal that MT acetylation levels need to be tightly regulated during proplatelet formation. We identify PAK1 as a direct regulator of the MT acetylation levels during this process as we found that PAK1 phosphorylates the MT acetyltransferase MEC-17 and inhibits its activity.
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29
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Ryu NM, Kim JM. The role of the α-tubulin acetyltransferase αTAT1 in the DNA damage response. J Cell Sci 2020; 133:jcs.246702. [PMID: 32788234 DOI: 10.1242/jcs.246702] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 07/27/2020] [Indexed: 11/20/2022] Open
Abstract
Lysine 40 acetylation of α-tubulin (Ac-α-tubulin), catalyzed by the acetyltransferase αTAT1, marks stabilized microtubules. Recently, there is growing evidence to suggest crosstalk between the DNA damage response (DDR) and microtubule organization; we therefore investigated whether αTAT1 is involved in the DDR. Following treatment with DNA-damaging agents, increased levels of Ac-α-tubulin were detected. We also observed significant induction of Ac-α-tubulin after depletion of DNA repair proteins, suggesting that αTAT1 is positively regulated in response to DNA damage. Intriguingly, αTAT1 depletion decreased DNA damage-induced replication protein A (RPA) phosphorylation and foci formation. Moreover, DNA damage-induced cell cycle arrest was significantly delayed in αTAT1-depleted cells, indicating defective checkpoint activation. The checkpoint defects seen upon αTAT1 deficiency were restored by expression of wild-type αTAT1, but not by αTAT1-D157N (a catalytically inactive αTAT1), indicating that the role of αTAT1 in the DDR is dependent on enzymatic activity. Furthermore, αTAT1-depleted direct repeat GFP (DR-GFP) U2OS cells had a significant decrease in the frequency of homologous recombination repair. Collectively, our results suggest that αTAT1 may play an essential role in DNA damage checkpoints and DNA repair through its acetyltransferase activity.
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Affiliation(s)
- Na Mi Ryu
- Department of Pharmacology, Chonnam National University Medical School, Jellanamdo, 58128, Republic of Korea
| | - Jung Min Kim
- Department of Pharmacology, Chonnam National University Medical School, Jellanamdo, 58128, Republic of Korea
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30
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Liu Y, Zhang Y, Zhu K, Chi S, Wang C, Xie A. Emerging Role of Sirtuin 2 in Parkinson's Disease. Front Aging Neurosci 2020; 11:372. [PMID: 31998119 PMCID: PMC6965030 DOI: 10.3389/fnagi.2019.00372] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 12/19/2019] [Indexed: 12/17/2022] Open
Abstract
Parkinson’s disease (PD), the main risk factor of which is age, is one of the most common neurodegenerative diseases, thus presenting a substantial burden on the health of affected individuals as well as an economic burden. Sirtuin 2 (SIRT2), a subtype in the family of sirtuins, belongs to class III histone deacetylases (HDACs). It is known that SIRT2 levels increase with aging, and a growing body of evidence has been accumulating, showing that the activity of SIRT2 mediates various processes involved in PD pathogenesis, including aggregation of α-synuclein (α-syn), microtubule function, oxidative stress, inflammation, and autophagy. There have been conflicting reports about the role of SIRT2 in PD, in that some studies indicate its potential to induce the death of dopaminergic (DA) neurons, and that inhibition of SIRT2 may, therefore, have protective effects in PD. Other studies suggest a protective role of SIRT2 in the context of neuronal damage. As current treatments for PD are directed at alleviating symptoms and are very limited, a comprehensive understanding of the enzymology of SIRT2 in PD may be essential for developing novel therapeutic agents for the treatment of this disease. This review article will provide an update on our knowledge of the structure, distribution, and biological characteristics of SIRT2, and highlight its role in the pathogenesis of PD.
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Affiliation(s)
- Yumei Liu
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yingying Zhang
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Konghua Zhu
- Department of Neurology, The Eighth People Hospital of Qingdao City, Qingdao, China
| | - Song Chi
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chong Wang
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Anmu Xie
- Department of Neurology, The Affiliated Hospital of Qingdao University, Qingdao, China
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31
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Dan Wei, Gao N, Li L, Zhu JX, Diao L, Huang J, Han QJ, Wang S, Xue H, Wang Q, Wu QF, Zhang X, Bao L. α-Tubulin Acetylation Restricts Axon Overbranching by Dampening Microtubule Plus-End Dynamics in Neurons. Cereb Cortex 2019; 28:3332-3346. [PMID: 28968698 DOI: 10.1093/cercor/bhx225] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Indexed: 11/14/2022] Open
Abstract
Axon growth is tightly controlled to establish functional neural circuits during brain development. Despite the belief that cytoskeletal dynamics is critical for cell morphology, how microtubule acetylation regulates axon development in the mammalian central nervous system remains unclear. Here, we report that loss of α-tubulin acetylation by ablation of MEC-17 in mice predisposes neurons to axon overbranching and overgrowth. Introduction of MEC-17F183A lacking α-tubulin acetyltransferase activity into MEC-17-deficient neurons failed to rescue axon defects. Moreover, loss of α-tubulin acetylation led to increases in microtubule debundling, microtubule invasion into filopodia and growth cones, and microtubule plus-end dynamics along the axon. Taxol application dampened microtubule hyperdynamics and suppressed axon overbranching and overgrowth in MEC-17-deficient neurons. Thus, our study reveals that α-tubulin acetylation acts as a brake for axon overbranching and overgrowth by dampening microtubule dynamics, providing insight into the role of microtubule post-translational modifications in regulating neural development.
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Affiliation(s)
- Dan Wei
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Nannan Gao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Lei Li
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jing-Xiang Zhu
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Lei Diao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jiansong Huang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Qing-Jian Han
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shaogang Wang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Huaqing Xue
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Qiong Wang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Qing-Feng Wu
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xu Zhang
- Institute of Neuroscience and State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Lan Bao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
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32
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Dorsch LM, Schuldt M, dos Remedios CG, Schinkel AFL, de Jong PL, Michels M, Kuster DWD, Brundel BJJM, van der Velden J. Protein Quality Control Activation and Microtubule Remodeling in Hypertrophic Cardiomyopathy. Cells 2019; 8:E741. [PMID: 31323898 PMCID: PMC6678711 DOI: 10.3390/cells8070741] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/11/2019] [Accepted: 07/17/2019] [Indexed: 12/14/2022] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is the most common inherited cardiac disorder. It is mainly caused by mutations in genes encoding sarcomere proteins. Mutant forms of these highly abundant proteins likely stress the protein quality control (PQC) system of cardiomyocytes. The PQC system, together with a functional microtubule network, maintains proteostasis. We compared left ventricular (LV) tissue of nine donors (controls) with 38 sarcomere mutation-positive (HCMSMP) and 14 sarcomere mutation-negative (HCMSMN) patients to define HCM and mutation-specific changes in PQC. Mutations in HCMSMP result in poison polypeptides or reduced protein levels (haploinsufficiency, HI). The main findings were 1) several key PQC players were more abundant in HCM compared to controls, 2) after correction for sex and age, stabilizing heat shock protein (HSP)B1, and refolding, HSPD1 and HSPA2 were increased in HCMSMP compared to controls, 3) α-tubulin and acetylated α-tubulin levels were higher in HCM compared to controls, especially in HCMHI, 4) myosin-binding protein-C (cMyBP-C) levels were inversely correlated with α-tubulin, and 5) α-tubulin levels correlated with acetylated α-tubulin and HSPs. Overall, carrying a mutation affects PQC and α-tubulin acetylation. The haploinsufficiency of cMyBP-C may trigger HSPs and α-tubulin acetylation. Our study indicates that proliferation of the microtubular network may represent a novel pathomechanism in cMyBP-C haploinsufficiency-mediated HCM.
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Affiliation(s)
- Larissa M Dorsch
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, 1081 HV Amsterdam, The Netherlands.
| | - Maike Schuldt
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, 1081 HV Amsterdam, The Netherlands
| | - Cristobal G dos Remedios
- Sydney Heart Bank, Discipline of Anatomy, Bosch Institute, University of Sydney, Sydney 2006, Australia
| | - Arend F L Schinkel
- Department of Cardiology, Thoraxcenter, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Peter L de Jong
- Department of Cardiothoracic Surgery, Thoraxcenter, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Michelle Michels
- Department of Cardiology, Thoraxcenter, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Diederik W D Kuster
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, 1081 HV Amsterdam, The Netherlands
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, 1081 HV Amsterdam, The Netherlands
| | - Jolanda van der Velden
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, 1081 HV Amsterdam, The Netherlands
- Netherlands Heart Institute, 3511 EP Utrecht, The Netherlands
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Yang L, Zhao L, Cui L, Huang Y, Ye J, Zhang Q, Jiang X, Zhang D, Huang Y. Decreased α-tubulin acetylation induced by an acidic environment impairs autophagosome formation and leads to rat cardiomyocyte injury. J Mol Cell Cardiol 2019; 127:143-153. [DOI: 10.1016/j.yjmcc.2018.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 12/02/2018] [Accepted: 12/20/2018] [Indexed: 11/26/2022]
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Zeng QZ, Yang F, Li CG, Xu LH, He XH, Mai FY, Zeng CY, Zhang CC, Zha QB, Ouyang DY. Paclitaxel Enhances the Innate Immunity by Promoting NLRP3 Inflammasome Activation in Macrophages. Front Immunol 2019; 10:72. [PMID: 30761140 PMCID: PMC6361797 DOI: 10.3389/fimmu.2019.00072] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/11/2019] [Indexed: 12/22/2022] Open
Abstract
Microtubules play critical roles in regulating the activation of NLRP3 inflammasome and microtubule-destabilizing agents such as colchicine have been shown to suppress the activation of this inflammasome. However, it remains largely unknown whether paclitaxel, a microtubule-stabilizing agent being used in cancer therapy, has any influences on NLRP3 inflammasome activation. Here we showed that paclitaxel pre-treatment greatly enhanced ATP- or nigericin-induced NLRP3 inflammasome activation as indicated by increased release of cleaved caspase-1 and mature IL-1β, enhanced formation of ASC speck, and increased gasdermin D cleavage and pyroptosis. Paclitaxel time- and dose-dependently induced α-tubulin acetylation in LPS-primed murine and human macrophages and further increased ATP- or nigericin-induced α-tubulin acetylation. Such increased α-tubulin acetylation was significantly suppressed either by resveratrol or NAD+ (coenzyme required for deacetylase activity of SIRT2), or by genetic knockdown of MEC-17 (gene encoding α-tubulin acetyltransferase 1). Concurrently, the paclitaxel-mediated enhancement of NLRP3 inflammasome activation was significantly suppressed by resveratrol, NAD+, or MEC-17 knockdown, indicating the involvement of paclitaxel-induced α-tubulin acetylation in the augmentation of NLRP3 inflammasome activation. Similar to paclitaxel, epothilone B that is another microtubule-stabilizing agent also induced α-tubulin acetylation and increased NLRP3 inflammasome activation in macrophages in response to ATP treatment. Consistent with the in vitro results, intraperitoneal administration of paclitaxel significantly increased serum IL-1β levels, reduced bacterial burden, dampened infiltration of inflammatory cells in the liver, and improved animal survival in a mouse model of bacterial infection. Collectively, our data indicate that paclitaxel potentiated NLRP3 inflammasome activation by inducing α-tubulin acetylation and thereby conferred enhanced antibacterial innate responses, suggesting its potential application against pathogenic infections beyond its use as a chemotherapeutic agent.
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Affiliation(s)
- Qiong-Zhen Zeng
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Fan Yang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Chen-Guang Li
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Li-Hui Xu
- Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xian-Hui He
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Feng-Yi Mai
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Chen-Ying Zeng
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Cheng-Cheng Zhang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Qing-Bing Zha
- Department of Fetal Medicine, the First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Dong-Yun Ouyang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
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Plaud C, Joshi V, Kajevu N, Poüs C, Curmi PA, Burgo A. Functional differences of short and long isoforms of spastin harboring missense mutation. Dis Model Mech 2018; 11:11/9/dmm033704. [PMID: 30213879 PMCID: PMC6177001 DOI: 10.1242/dmm.033704] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 07/03/2018] [Indexed: 01/05/2023] Open
Abstract
Mutations of the SPG4 (SPAST) gene encoding for spastin protein are the main causes of hereditary spastic paraplegia. Spastin binds to microtubules and severs them through the enzymatic activity of its AAA domain. Several missense mutations located in this domain lead to stable, nonsevering spastins that decorate a subset of microtubules, suggesting a possible negative gain-of-function mechanism for these mutants. Of the two main isoforms of spastin, only mutations of the long isoform, M1, are supposed to be involved in the onset of the pathology, leaving the role of the ubiquitously expressed shorter one, M87, not fully investigated and understood. Here, we show that two isoforms of spastin harboring the same missense mutation bind and bundle different subsets of microtubules in HeLa cells, and likely stabilize them by increasing the level of acetylated tubulin. However, only mutated M1 has the ability to interact with wild-type M1, and decorates a subset of perinuclear microtubules associated with the endoplasmic reticulum that display higher resistance to microtubule depolymerization and increased intracellular ionic strength, compared with those decorated by mutated M87. We further show that only mutated M1 decorates microtubules of proximal axons and dendrites, and strongly impairs axonal transport in cortical neurons through a mechanism likely independent of the microtubule-severing activity of this protein. Summary: Long and short isoforms of spastin (SPG4) harboring the same missense mutation show different intracellular localization, resistance to pharmacological treatments and effects on axonal cargo transport.
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Affiliation(s)
- Clément Plaud
- Structure and Activity of Normal and Pathological Biomolecules, INSERM U1204, Université Paris Saclay, Université d'Evry, 91000 Evry, France
| | - Vandana Joshi
- Structure and Activity of Normal and Pathological Biomolecules, INSERM U1204, Université Paris Saclay, Université d'Evry, 91000 Evry, France
| | - Natallie Kajevu
- Structure and Activity of Normal and Pathological Biomolecules, INSERM U1204, Université Paris Saclay, Université d'Evry, 91000 Evry, France
| | - Christian Poüs
- INSERM UMR-S 1193, Faculty of Pharmacy, Univirsité Paris-Sud, Université Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Patrick A Curmi
- Structure and Activity of Normal and Pathological Biomolecules, INSERM U1204, Université Paris Saclay, Université d'Evry, 91000 Evry, France
| | - Andrea Burgo
- Structure and Activity of Normal and Pathological Biomolecules, INSERM U1204, Université Paris Saclay, Université d'Evry, 91000 Evry, France
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Abstract
Each neuron forms a single axon and multiple dendrites, and this configuration is important for wiring the brain. How only a single axon extends from a neuron, however, remains unknown. This study demonstrates that CAMSAP3, a protein that binds the minus-end of microtubules, preferentially localizes along axons in hippocampal neurons. Remarkably, mutations of CAMSAP3 lead to production of multiple axons in these neurons. In attempts to uncover mechanisms underlying this abnormal axon extension, the authors found that CAMSAP3-anchored microtubules escape from acetylation, a process mediated by α-tubulin acetyltransferase-1, and depletion of this enzyme abolishes abnormal axon formation in CAMSAP3 mutants. These findings reveal that CAMSAP3 controls microtubule dynamics, preventing tubulin acetylation; this mechanism is required for single-axon formation. The molecular mechanisms that guide each neuron to become polarized, forming a single axon and multiple dendrites, remain unknown. Here we show that CAMSAP3 (calmodulin-regulated spectrin-associated protein 3), a protein that regulates the minus-end dynamics of microtubules, plays a key role in maintaining neuronal polarity. In mouse hippocampal neurons, CAMSAP3 was enriched in axons. Although axonal microtubules were generally acetylated, CAMSAP3 was preferentially localized along a less-acetylated fraction of the microtubules. CAMSAP3-mutated neurons often exhibited supernumerary axons, along with an increased number of neurites having nocodazole-resistant/acetylated microtubules compared with wild-type neurons. Analysis using cell lines showed that CAMSAP3 depletion promoted tubulin acetylation, and conversely, mild overexpression of CAMSAP3 inhibited it, suggesting that CAMSAP3 works to retain nonacetylated microtubules. In contrast, CAMSAP2, a protein related to CAMSAP3, was detected along all neurites, and its loss did not affect neuronal polarity, nor did it cause increased tubulin acetylation. Depletion of α-tubulin acetyltransferase-1 (αTAT1), the key enzyme for tubulin acetylation, abolished CAMSAP3 loss-dependent multiple-axon formation. These observations suggest that CAMSAP3 sustains a nonacetylated pool of microtubules in axons, interfering with the action of αTAT1, and this process is important to maintain neuronal polarity.
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TAK1 activation of alpha-TAT1 and microtubule hyperacetylation control AKT signaling and cell growth. Nat Commun 2018; 9:1696. [PMID: 29703898 PMCID: PMC5923212 DOI: 10.1038/s41467-018-04121-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 04/04/2018] [Indexed: 01/04/2023] Open
Abstract
Acetylation of microtubules (MT) confers mechanical stability necessary for numerous functions including cell cycle and intracellular transport. Although αTAT1 is a major MT acetyltransferase, how this enzyme is regulated remains much less clear. Here we report TGF-β-activated kinase 1 (TAK1) as a key activator of αTAT1. TAK1 directly interacts with and phosphorylates αTAT1 at Ser237 to critically enhance its catalytic activity, as mutating this site to alanine abrogates, whereas a phosphomimetic induces MT hyperacetylation across cell types. Using a custom phospho-αTAT1-Ser237 antibody, we screen various mouse tissues to discover that brain contains some of the highest TAK1-dependent αTAT1 activity, which, accordingly, is diminished rapidly upon intra-cerebral injection of a TAK1 inhibitor. Lastly, we show that TAK1 selectively inhibits AKT to suppress mitogenic and metabolism-related pathways through MT-based mechanisms in culture and in vivo. Collectively, our findings support a fundamental new role for TGF-β signaling in MT-related functions and disease. Acetylation of microtubules (MT) confers mechanical stability necessary for numerous cellular functions but its regulation is unclear. Here the authors show that the MT acetyltransferase αTAT1 is regulated by TGF-β-activated kinase 1 implicating TGF-β signaling in MT-related functions and disease.
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38
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Yakhine-Diop SMS, Rodríguez-Arribas M, Martínez-Chacón G, Uribe-Carretero E, Gómez-Sánchez R, Aiastui A, López de Munain A, Bravo-San Pedro JM, Niso-Santano M, González-Polo RA, Fuentes JM. Acetylome in Human Fibroblasts From Parkinson's Disease Patients. Front Cell Neurosci 2018; 12:97. [PMID: 29719501 PMCID: PMC5913320 DOI: 10.3389/fncel.2018.00097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 03/22/2018] [Indexed: 12/15/2022] Open
Abstract
Parkinson's disease (PD) is a multifactorial neurodegenerative disorder. The pathogenesis of this disease is associated with gene and environmental factors. Mutations in leucine-rich repeat kinase 2 (LRRK2) are the most frequent genetic cause of familial and sporadic PD. Moreover, posttranslational modifications, including protein acetylation, are involved in the molecular mechanism of PD. Acetylation of lysine proteins is a dynamic process that is modulated in PD. In this descriptive study, we characterized the acetylated proteins and peptides in primary fibroblasts from idiopathic PD (IPD) and genetic PD harboring G2019S or R1441G LRRK2 mutations. Identified acetylated peptides are modulated between individuals' groups. Although acetylated nuclear proteins are the most represented in cells, they are hypoacetylated in IPD. Results display that the level of hyperacetylated and hypoacetylated peptides are, respectively, enhanced in genetic PD and in IPD cells.
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Affiliation(s)
- Sokhna M S Yakhine-Diop
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
| | - Mario Rodríguez-Arribas
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
| | - Guadalupe Martínez-Chacón
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
| | - Elisabet Uribe-Carretero
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
| | - Rubén Gómez-Sánchez
- Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Ana Aiastui
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Cell Culture Plataform, Donostia University Hospital, San Sebastián, Spain.,Neuroscience Area of Biodonostia Health Research Institute, Donostia University Hospital, San Sebastián, Spain
| | - Adolfo López de Munain
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Neuroscience Area of Biodonostia Health Research Institute, Donostia University Hospital, San Sebastián, Spain.,Department of Neurology, Donostia University Hospital, San Sebastian, Spain.,Ilundain Fundazioa, San Sebastian, Spain.,Department of Neurosciences, University of the Basque Country UPV-EHU, San Sebastián, Spain
| | - José M Bravo-San Pedro
- Equipe 11 labellisèe Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM U1138, Paris, France.,Université Paris Descartes/Paris V, Sorbonne Paris Cité, Paris, France.,Université Pierre et Marie Curie/Paris VI, Paris, France.,Gustave Roussy Comprehensive Cancer Institute, Villejuif, France
| | - Mireia Niso-Santano
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
| | - Rosa A González-Polo
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
| | - José M Fuentes
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas, Madrid, Spain.,Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
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Cocco E, Leo M, Canzonetta C, Di Vito S, Mai A, Rotili D, Di Napoli A, Vecchione A, De Nunzio C, Filetici P, Stoppacciaro A. KAT3B-p300 and H3AcK18/H3AcK14 levels are prognostic markers for kidney ccRCC tumor aggressiveness and target of KAT inhibitor CPTH2. Clin Epigenetics 2018; 10:44. [PMID: 29632619 PMCID: PMC5885315 DOI: 10.1186/s13148-018-0473-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 03/14/2018] [Indexed: 12/26/2022] Open
Abstract
Background Kidney cancer and clear cell renal carcinoma (ccRCC) are the 16th most common cause of death worldwide. ccRCC is often metastasized at diagnosis, and surgery remains the main treatment; therefore, early diagnosis and new therapeutic strategies are highly desirable. KAT inhibitor CPTH2 lowers histone H3 acetylation and induces apoptosis in colon cancer and cultured cerebellar granule neurons. In this study, we have evaluated the effects of CPTH2 on ccRCC 786-O cell line and analyzed drug targets expressed in ccRCC tumor tissues at different grade. Results CPTH2 decreases cell viability, adhesion, and invasiveness in ccRCC cell line 786-O. It shows preferential inhibition for KAT3B-p300 with hypoacetilating effects on histone H3 at specific H3-K18. Immunohistochemical analysis of 70 ccRCC tumor tissues compared with peritumoral normal epithelium showed a statistical significant reduction of p300/H3AcK18 paralleled by an increase of H3AcK14 in G1 grade and an opposed trend during tumor progression to worst grades. In this study, we demonstrate that these marks are CPTH2 targets and significative prognosticators of low-grade ccRCC tumor. Conclusions ccRCC is substantially insensitive to current therapies, and the efficacy of clinical treatment is dependent on the dissemination stage of the tumor. The present study shows that CPTH2 is able to induce apoptosis and decrease the invasiveness of a ccRCC cell line through the inhibition of KAT3B. In a tumor tissue analysis, we identified new prognosticator marks in grade G1 ccRCC tumors. Low KAT3B/H3AcK18 vs. high H3AcK14 were found in G1 while an opposed trend characterized tumor progression to worst grades. Our collected results suggest that CPTH2 reducing KAT3B and H3AcK18 can be considered a promising candidate for counteracting the progression of ccRCC tumors. Electronic supplementary material The online version of this article (10.1186/s13148-018-0473-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elisa Cocco
- 1Surgical Pathology Units, Department of Clinical and Molecular Medicine, Ospedale Sant'Andrea, La Sapienza University, Rome, Italy
| | - Manuela Leo
- 2Department of Biology and Biotechnology "C. Darwin", La Sapienza University of Rome, Rome, Italy
| | - Claudia Canzonetta
- 3Department of Immunology, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
| | - Serena Di Vito
- 4Institute of Molecular Biology and Pathology-CNR, La Sapienza University of Rome, P.le, A. Moro 5, Rome, Italy
| | - Antonello Mai
- 5Department of Drug Chemistry and Technology, Istituto Pasteur Italia - Fondazione Cenci Bolognetti, La Sapienza University, P.le Aldo Moro, 5, 00185 Rome, Italy
| | - Dante Rotili
- 5Department of Drug Chemistry and Technology, Istituto Pasteur Italia - Fondazione Cenci Bolognetti, La Sapienza University, P.le Aldo Moro, 5, 00185 Rome, Italy
| | - Arianna Di Napoli
- 1Surgical Pathology Units, Department of Clinical and Molecular Medicine, Ospedale Sant'Andrea, La Sapienza University, Rome, Italy
| | - Andrea Vecchione
- 1Surgical Pathology Units, Department of Clinical and Molecular Medicine, Ospedale Sant'Andrea, La Sapienza University, Rome, Italy
| | - Cosimo De Nunzio
- 6Urology Unit, Department of Clinical and Molecular Medicine, Ospedale Sant'Andrea, La Sapienza University, Rome, Italy
| | - Patrizia Filetici
- 4Institute of Molecular Biology and Pathology-CNR, La Sapienza University of Rome, P.le, A. Moro 5, Rome, Italy
| | - Antonella Stoppacciaro
- 1Surgical Pathology Units, Department of Clinical and Molecular Medicine, Ospedale Sant'Andrea, La Sapienza University, Rome, Italy
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40
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Madeo F, Eisenberg T, Pietrocola F, Kroemer G. Spermidine in health and disease. Science 2018; 359:359/6374/eaan2788. [DOI: 10.1126/science.aan2788] [Citation(s) in RCA: 438] [Impact Index Per Article: 73.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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41
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Hui KY, Fernandez-Hernandez H, Hu J, Schaffner A, Pankratz N, Hsu NY, Chuang LS, Carmi S, Villaverde N, Li X, Rivas M, Levine AP, Bao X, Labrias PR, Haritunians T, Ruane D, Gettler K, Chen E, Li D, Schiff ER, Pontikos N, Barzilai N, Brant SR, Bressman S, Cheifetz AS, Clark LN, Daly MJ, Desnick RJ, Duerr RH, Katz S, Lencz T, Myers RH, Ostrer H, Ozelius L, Payami H, Peter Y, Rioux JD, Segal AW, Scott WK, Silverberg MS, Vance JM, Ubarretxena-Belandia I, Foroud T, Atzmon G, Pe'er I, Ioannou Y, McGovern DPB, Yue Z, Schadt EE, Cho JH, Peter I. Functional variants in the LRRK2 gene confer shared effects on risk for Crohn's disease and Parkinson's disease. Sci Transl Med 2018; 10:eaai7795. [PMID: 29321258 PMCID: PMC6028002 DOI: 10.1126/scitranslmed.aai7795] [Citation(s) in RCA: 237] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 03/31/2017] [Accepted: 07/18/2017] [Indexed: 12/28/2022]
Abstract
Crohn's disease (CD), a form of inflammatory bowel disease, has a higher prevalence in Ashkenazi Jewish than in non-Jewish European populations. To define the role of nonsynonymous mutations, we performed exome sequencing of Ashkenazi Jewish patients with CD, followed by array-based genotyping and association analysis in 2066 CD cases and 3633 healthy controls. We detected association signals in the LRRK2 gene that conferred risk for CD (N2081D variant, P = 9.5 × 10-10) or protection from CD (N551K variant, tagging R1398H-associated haplotype, P = 3.3 × 10-8). These variants affected CD age of onset, disease location, LRRK2 activity, and autophagy. Bayesian network analysis of CD patient intestinal tissue further implicated LRRK2 in CD pathogenesis. Analysis of the extended LRRK2 locus in 24,570 CD cases, patients with Parkinson's disease (PD), and healthy controls revealed extensive pleiotropy, with shared genetic effects between CD and PD in both Ashkenazi Jewish and non-Jewish cohorts. The LRRK2 N2081D CD risk allele is located in the same kinase domain as G2019S, a mutation that is the major genetic cause of familial and sporadic PD. Like the G2019S mutation, the N2081D variant was associated with increased kinase activity, whereas neither N551K nor R1398H variants on the protective haplotype altered kinase activity. We also confirmed that R1398H, but not N551K, increased guanosine triphosphate binding and hydrolyzing enzyme (GTPase) activity, thereby deactivating LRRK2. The presence of shared LRRK2 alleles in CD and PD provides refined insight into disease mechanisms and may have major implications for the treatment of these two seemingly unrelated diseases.
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Affiliation(s)
- Ken Y Hui
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
- Program in Computational Biology and Bioinformatics, Yale University, New Haven, CT 06520, USA
| | | | - Jianzhong Hu
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Adam Schaffner
- Departments of Neurology and Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nathan Pankratz
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Nai-Yun Hsu
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Ling-Shiang Chuang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Shai Carmi
- Braun School of Public Health and Community Medicine, The Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Nicole Villaverde
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Xianting Li
- Departments of Neurology and Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Manual Rivas
- Department of Medical and Population Genetics, Broad Institute, Cambridge, MA 02142, USA
- Analytical and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Adam P Levine
- Centre for Molecular Medicine, Division of Medicine, University College, London WC1E 6JF, UK
| | - Xiuliang Bao
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Philippe R Labrias
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Talin Haritunians
- Translational Genomics Group, F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Darren Ruane
- Department of Immunology and Inflammation, Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | - Kyle Gettler
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
- Department of Genetics, Yale University, New Haven, CT 06520, USA
| | - Ernie Chen
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Dalin Li
- Translational Genomics Group, F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Elena R Schiff
- Centre for Molecular Medicine, Division of Medicine, University College, London WC1E 6JF, UK
| | - Nikolas Pontikos
- Centre for Molecular Medicine, Division of Medicine, University College, London WC1E 6JF, UK
| | - Nir Barzilai
- Departments of Genetics and Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Steven R Brant
- Harvey M. and Lyn P. Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD 21231, USA
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21231, USA
| | - Susan Bressman
- Alan and Barbara Mirken Department of Neurology, Beth Israel Medical Center, New York, NY 10003, USA
| | - Adam S Cheifetz
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Lorraine N Clark
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA
- Taub Institute for Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY 10032, USA
| | - Mark J Daly
- Department of Medical and Population Genetics, Broad Institute, Cambridge, MA 02142, USA
- Analytical and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA
- Taub Institute for Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY 10032, USA
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Robert J Desnick
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Richard H Duerr
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15261, USA
| | - Seymour Katz
- New York University School of Medicine, New York City, NY 10016, USA
- North Shore University-Long Island Jewish Medical Center, Manhasset, NY, USA
- St. Francis Hospital, Roslyn, NY 11576, USA
| | - Todd Lencz
- Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY 11030, USA
| | - Richard H Myers
- Department of Neurology, Boston University School of Medicine, Boston, MA 02114, USA
| | - Harry Ostrer
- Departments of Pathology and Pediatrics, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Laurie Ozelius
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Deparment of Neurology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Haydeh Payami
- Departments of Neurology and Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- HudsonAlpha Institute for Biotechnology, Huntsville, AL 35805, USA
| | - Yakov Peter
- Department of Biology, Touro College, Queens, NY 10033, USA
- Department of Pulmonary Medicine, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10033, USA
| | - John D Rioux
- Research Center, Montreal Heart Institute, Montreal, Quebec H1T1C8, Canada
- Faculté de Médecine, Université de Montréal, Montreal, Quebec H1T1C8, Canada
| | - Anthony W Segal
- Centre for Molecular Medicine, Division of Medicine, University College, London WC1E 6JF, UK
| | - William K Scott
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Mark S Silverberg
- Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, Toronto, Ontario M5T3L9, USA
- Department of Medicine, University of Toronto, Toronto, Ontario M5G1X5, Canada
| | - Jeffery M Vance
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Iban Ubarretxena-Belandia
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Tatiana Foroud
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Gil Atzmon
- Departments of Genetics and Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Faculty of Natural Sciences, University of Haifa, Haifa 3498838, Israel
| | - Itsik Pe'er
- Center for Computational Biology and Bioinformatics, Columbia University, New York, NY 10032, USA
| | - Yiannis Ioannou
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Dermot P B McGovern
- Translational Genomics Group, F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Zhenyu Yue
- Departments of Neurology and Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Eric E Schadt
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Institute for Genetics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Sema4, a Mount Sinai venture, Stamford, CT 06902, USA
| | - Judy H Cho
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Genetics, Yale University, New Haven, CT 06520, USA
- Section of Gastroenterology and Hepatology, Department of Pediatrics, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Inga Peter
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
- Institute for Genetics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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42
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Kashyap D, Sharma A, Sak K, Tuli HS, Buttar HS, Bishayee A. Fisetin: A bioactive phytochemical with potential for cancer prevention and pharmacotherapy. Life Sci 2017; 194:75-87. [PMID: 29225112 DOI: 10.1016/j.lfs.2017.12.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/28/2017] [Accepted: 12/05/2017] [Indexed: 02/07/2023]
Abstract
A wide variety of chronic diseases, such as neurodegenerative and cardiovascular disorders, diabetes mellitus, osteoarthtitis, obesity and various cancers, are now being treated with cost effective phytomedicines. Since synthetic medicines are very expensive, concerted efforts are being made in developing and poor countries to discover cost effective medicines for the treatment of non-communicable diseases (NCDs). Understanding the underlying mechanisms of bioactive medicines from natural sources would not only open incipient avenues for the scientific community and pharmaceutical industry to discover new drug molecules for the therapy of NCDs, but also help to garner knowledge for alternative therapeutic approaches for the management of chronic diseases. Fisetin is a polyphenolic molecule of flavonoids class, and belongs to the bioactive phytochemicals that have potential to block multiple signaling pathways associated with NCDs such as cell division, angiogenesis, metastasis, oxidative stress, and inflammation. The emerging evidence suggests that fisetin may be useful for the prevention and management of several types of human malignancies. Efforts are being made to enhance the bioavailability of fisetin after oral administration to prevent and/or treat cancer of the liver, breast, ovary and other organs. The intent of this review is to highlight the in vitro and in vivo activities of fisetin and to provide up-to-date information about the molecular interactions of fisetin with its cellular targets involved in cancer initiation, promotion and progression as well as to focus on strategies underway to increase the bioavailability and reduce the risk of deleterious effects, if any, associated with fisetin administration.
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Affiliation(s)
- Dharambir Kashyap
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh 160 012, Punjab, India
| | - Ajay Sharma
- Department of Chemistry, Career Point University, Tikker-Kharwarian, Hamirpur 176 041, Himachal Pradesh, India
| | | | - Hardeep Singh Tuli
- Department of Biotechnology, Maharishi Markandeshwar University, Mullana-Ambala 133 207, Haryana, India.
| | - Harpal Singh Buttar
- Department of Pathology and Laboratory Medicine, Faculty of Medicine, University of Ottawa, Ontario, K1N 6N5, Canada
| | - Anupam Bishayee
- Department of Pharmaceutical Sciences, College of Pharmacy, Larkin University, Miami, FL 33169, USA
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43
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Perdiz D, Lorin S, Leroy-Gori I, Poüs C. Stress-induced hyperacetylation of microtubule enhances mitochondrial fission and modulates the phosphorylation of Drp1 at 616Ser. Cell Signal 2017; 39:32-43. [PMID: 28757354 DOI: 10.1016/j.cellsig.2017.07.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/22/2017] [Accepted: 07/26/2017] [Indexed: 01/01/2023]
Abstract
Mitochondria dynamics results from fission and fusion events that may be unbalanced in favor of mitochondrial fragmentation upon cell stress. During oxidative stress, microtubules are hyperacetylated in a mitochondria-dependent manner. In this study, we show that under stress conditions, most of the mitochondria form foci with microtubule domains that carry Drp1. We also demonstrate that stress-induced hyperacetylation of microtubules is required for the effective induction of Drp1 phosphorylation at 616Ser, in a kinesin-1- and c-Jun N-terminal kinase-dependent manner. Furthermore, hyperacetylation of microtubules contributes to the recruitment of total Drp1 to mitochondria to enhance fission. These results highlight a new way of interaction between microtubules and mitochondria dynamics.
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Affiliation(s)
- Daniel Perdiz
- Univ. Paris-Sud, INSERM UMR-S 1193, Université Paris-Saclay, Faculté de Pharmacie, Châtenay-Malabry, France.
| | - Séverine Lorin
- Univ. Paris-Sud, INSERM UMR-S 1193, Université Paris-Saclay, Faculté de Pharmacie, Châtenay-Malabry, France
| | - Ingrid Leroy-Gori
- Univ. Paris-Sud, INSERM UMR-S 1193, Université Paris-Saclay, Faculté de Pharmacie, Châtenay-Malabry, France
| | - Christian Poüs
- Univ. Paris-Sud, INSERM UMR-S 1193, Université Paris-Saclay, Faculté de Pharmacie, Châtenay-Malabry, France; Biochimie-Hormonologie, APHP, Hôpitaux Universitaires Paris-Sud, Site Antoine Béclère, Clamart, France
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44
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Tandon M, Othman AH, Ashok V, Stein GS, Pratap J. The role of Runx2 in facilitating autophagy in metastatic breast cancer cells. J Cell Physiol 2017; 233:559-571. [PMID: 28345763 DOI: 10.1002/jcp.25916] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 03/17/2017] [Indexed: 02/06/2023]
Abstract
Breast cancer metastases cause significant patient mortality. During metastases, cancer cells use autophagy, a catabolic process to recycle nutrients via lysosomal degradation, to overcome nutritional stress for their survival. The Runt-related transcription factor, Runx2, promotes cell survival under metabolic stress, and regulates breast cancer progression and bone metastases. Here, we identify that Runx2 enhances autophagy in metastatic breast cancer cells. We defined Runx2 function in cellular autophagy by monitoring microtubule-associated protein light chain (LC3B-II) levels, an autophagy-specific marker. The electron and confocal microscopic analyses were utilized to identify alterations in autophagic vesicles. The Runx2 knockdown cells accumulate LC3B-II protein and autophagic vesicles due to reduced turnover. Interestingly, Runx2 promotes autophagy by enhancing trafficking of LC3B vesicles. Our mechanistic studies revealed that Runx2 promotes autophagy by increasing acetylation of α-tubulin sub-units of microtubules. Inhibiting autophagy decreased cell adhesion and survival of Runx2 knockdown cells. Furthermore, analysis of LC3B protein in clinical breast cancer specimens and tumor xenografts revealed significant association between high Runx2 and low LC3B protein levels. Our studies reveal a novel regulatory mechanism of autophagy via Runx2 and provide molecular insights into the role of autophagy in metastatic cancer cells.
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Affiliation(s)
- Manish Tandon
- Department of Cell and Molecular Medicine, Rush University Medical Center, Chicago, Illinois
| | - Ahmad H Othman
- Department of Cell and Molecular Medicine, Rush University Medical Center, Chicago, Illinois
| | - Vivek Ashok
- Department of Cell and Molecular Medicine, Rush University Medical Center, Chicago, Illinois
| | - Gary S Stein
- University of Vermont Cancer Center and Department of Biochemistry, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Jitesh Pratap
- Department of Cell and Molecular Medicine, Rush University Medical Center, Chicago, Illinois
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45
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Powell RT, Olar A, Narang S, Rao G, Sulman E, Fuller GN, Rao A. Identification of Histological Correlates of Overall Survival in Lower Grade Gliomas Using a Bag-of-words Paradigm: A Preliminary Analysis Based on Hematoxylin & Eosin Stained Slides from the Lower Grade Glioma Cohort of The Cancer Genome Atlas. J Pathol Inform 2017; 8:9. [PMID: 28382223 PMCID: PMC5364741 DOI: 10.4103/jpi.jpi_43_16] [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: 06/26/2016] [Accepted: 01/21/2017] [Indexed: 11/04/2022] Open
Abstract
Background: Glioma, the most common primary brain neoplasm, describes a heterogeneous tumor of multiple histologic subtypes and cellular origins. At clinical presentation, gliomas are graded according to the World Health Organization guidelines (WHO), which reflect the malignant characteristics of the tumor based on histopathological and molecular features. Lower grade diffuse gliomas (LGGs) (WHO Grade II–III) have fewer malignant characteristics than high-grade gliomas (WHO Grade IV), and a better clinical prognosis, however, accurate discrimination of overall survival (OS) remains a challenge. In this study, we aimed to identify tissue-derived image features using a machine learning approach to predict OS in a mixed histology and grade cohort of lower grade glioma patients. To achieve this aim, we used H and E stained slides from the public LGG cohort of The Cancer Genome Atlas (TCGA) to create a machine learned dictionary of “image-derived visual words” associated with OS. We then evaluated the combined efficacy of using these visual words in predicting short versus long OS by training a generalized machine learning model. Finally, we mapped these predictive visual words back to molecular signaling cascades to infer potential drivers of the machine learned survival-associated phenotypes. Methods: We analyzed digitized histological sections downloaded from the LGG cohort of TCGA using a bag-of-words approach. This method identified a diverse set of histological patterns that were further correlated with OS, histology, and molecular signaling activity using Cox regression, analysis of variance, and Spearman correlation, respectively. A support vector machine (SVM) model was constructed to discriminate patients into short and long OS groups dichotomized at 24-month. Results: This method identified disease-relevant phenotypes associated with OS, some of which are correlated with disease-associated molecular pathways. From these image-derived phenotypes, a generalized SVM model which could discriminate 24-month OS (area under the curve, 0.76) was obtained. Conclusion: Here, we demonstrated one potential strategy to incorporate image features derived from H and E stained slides into predictive models of OS. In addition, we showed how these image-derived phenotypic characteristics correlate with molecular signaling activity underlying the etiology or behavior of LGG.
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Affiliation(s)
- Reid Trenton Powell
- Center for Translational Cancer Research, Texas A and M Health Science Center, Institute of Biosciences and Technology, Houston, TX 77030, USA
| | - Adriana Olar
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Shivali Narang
- Department of Bioinformatics and Computational Biology, Division of Quantitative Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Ganesh Rao
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Erik Sulman
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Gregory N Fuller
- Department of Pathology (Section of Neuropathology), The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Arvind Rao
- Department of Bioinformatics and Computational Biology, Division of Quantitative Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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46
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Wobst HJ, Wesolowski SS, Chadchankar J, Delsing L, Jacobsen S, Mukherjee J, Deeb TZ, Dunlop J, Brandon NJ, Moss SJ. Cytoplasmic Relocalization of TAR DNA-Binding Protein 43 Is Not Sufficient to Reproduce Cellular Pathologies Associated with ALS In vitro. Front Mol Neurosci 2017; 10:46. [PMID: 28286471 PMCID: PMC5323424 DOI: 10.3389/fnmol.2017.00046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 02/10/2017] [Indexed: 12/12/2022] Open
Abstract
Mutations in the gene TARDBP, which encodes TAR DNA-binding protein 43 (TDP-43), are a rare cause of familial forms of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). While the majority of mutations are found in the C-terminal glycine-rich domain, an alanine to valine amino acid change at position 90 (A90V) in the bipartite nuclear localization signal (NLS) of TDP-43 has been described. This sequence variant has previously been shown to cause cytoplasmic mislocalization of TDP-43 and decrease protein solubility, leading to the formation of insoluble aggregates. Since the A90V mutation has been described both in patients as well as healthy controls, its pathogenic potential in ALS and FTD remains unclear. Here we compare properties of overexpressed A90V to the highly pathogenic M337V mutation. Though both mutations drive mislocalization of the protein to the cytoplasm to the same extent, M337V produces more significant damage in terms of protein solubility, levels of pathogenic phosphorylation, and formation of C-terminal truncated protein species. Furthermore, the M337V, but not the A90V mutant, leads to a downregulation of histone deacetylase 6 and Ras GTPase-activating protein-binding protein. We conclude that in the absence of another genetic or environmental ‘hit’ the A90V variant is not sufficient to cause the deleterious phenotypes associated with ALS and FTD, despite prominent cytoplasmic protein relocalization of TDP-43.
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Affiliation(s)
- Heike J Wobst
- AstraZeneca-Tufts Laboratory for Basic and Translational Neuroscience, Department of Neuroscience, Tufts University School of Medicine, Boston MA, USA
| | - Steven S Wesolowski
- IMED Biotech Unit, AstraZeneca Neuroscience IMED, AstraZeneca, Cambridge MA, USA
| | - Jayashree Chadchankar
- AstraZeneca-Tufts Laboratory for Basic and Translational Neuroscience, Department of Neuroscience, Tufts University School of Medicine, Boston MA, USA
| | - Louise Delsing
- AstraZeneca-Tufts Laboratory for Basic and Translational Neuroscience, Department of Neuroscience, Tufts University School of Medicine, BostonMA, USA; IMED Biotech Unit, AstraZeneca Discovery ScienceMölndal, Sweden
| | - Steven Jacobsen
- IMED Biotech Unit, AstraZeneca Neuroscience IMED, AstraZeneca, Cambridge MA, USA
| | - Jayanta Mukherjee
- AstraZeneca-Tufts Laboratory for Basic and Translational Neuroscience, Department of Neuroscience, Tufts University School of Medicine, Boston MA, USA
| | - Tarek Z Deeb
- AstraZeneca-Tufts Laboratory for Basic and Translational Neuroscience, Department of Neuroscience, Tufts University School of Medicine, Boston MA, USA
| | - John Dunlop
- IMED Biotech Unit, AstraZeneca Neuroscience IMED, AstraZeneca, Cambridge MA, USA
| | - Nicholas J Brandon
- IMED Biotech Unit, AstraZeneca Neuroscience IMED, AstraZeneca, Cambridge MA, USA
| | - Stephen J Moss
- AstraZeneca-Tufts Laboratory for Basic and Translational Neuroscience, Department of Neuroscience, Tufts University School of Medicine, BostonMA, USA; Department of Neuroscience, Tufts University School of Medicine, BostonMA, USA
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47
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Olzscha H, Fedorov O, Kessler BM, Knapp S, La Thangue NB. CBP/p300 Bromodomains Regulate Amyloid-like Protein Aggregation upon Aberrant Lysine Acetylation. Cell Chem Biol 2017; 24:9-23. [PMID: 27989401 PMCID: PMC5266481 DOI: 10.1016/j.chembiol.2016.11.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 09/23/2016] [Accepted: 11/15/2016] [Indexed: 12/22/2022]
Abstract
Lysine acetylation is becoming increasingly recognized as a general biological principle in cellular homeostasis, and is subject to abnormal control in different human pathologies. Here, we describe a global effect on amyloid-like protein aggregation in human cells that results from aberrant lysine acetylation. Bromodomain reader proteins are involved in the aggregation process and, using chemical biology and gene silencing, we establish that p300/CBP bromodomains are necessary for aggregation to occur. Moreover, protein aggregation disturbs proteostasis by impairing the ubiquitin proteasome system (UPS) and protein translation, resulting in decreased cell viability. p300/CBP bromodomain inhibitors impede aggregation, which coincides with enhanced UPS function and increased cell viability. Aggregation of a pathologically relevant form of huntingtin protein is similarly affected by p300/CBP inhibition. Our results have implications for understanding the molecular basis of protein aggregation, and highlight the possibility of treating amyloid-like pathologies and related protein folding diseases with bromodomain inhibitor-based strategies.
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Affiliation(s)
- Heidi Olzscha
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Oleg Fedorov
- Structural Genomics Consortium, University of Oxford, Old Road Campus Research Building, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Benedikt M Kessler
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Roosevelt Drive, Oxford OX3 7FZ, UK
| | - Stefan Knapp
- Structural Genomics Consortium, University of Oxford, Old Road Campus Research Building, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Nicholas B La Thangue
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK.
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48
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Carmona-Gutierrez D, Hughes AL, Madeo F, Ruckenstuhl C. The crucial impact of lysosomes in aging and longevity. Ageing Res Rev 2016; 32:2-12. [PMID: 27125853 DOI: 10.1016/j.arr.2016.04.009] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 03/26/2016] [Accepted: 04/23/2016] [Indexed: 02/07/2023]
Abstract
Lysosomes are the main catabolic organelles of a cell and play a pivotal role in a plethora of cellular processes, including responses to nutrient availability and composition, stress resistance, programmed cell death, plasma membrane repair, development, and cell differentiation. In line with this pleiotropic importance for cellular and organismal life and death, lysosomal dysfunction is associated with many age-related pathologies like Parkinson's and Alzheimer's disease, as well as with a decline in lifespan. Conversely, targeting lysosomal functional capacity is emerging as a means to promote longevity. Here, we analyze the current knowledge on the prominent influence of lysosomes on aging-related processes, such as their executory and regulatory roles during general and selective macroautophagy, or their storage capacity for amino acids and ions. In addition, we review and discuss the roles of lysosomes as active players in the mechanisms underlying known lifespan-extending interventions like, for example, spermidine or rapamycin administration. In conclusion, this review aims at critically examining the nature and pliability of the different layers, in which lysosomes are involved as a control hub for aging and longevity.
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49
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Chakrabarti KR, Whipple RA, Boggs AE, Hessler LK, Bhandary L, Vitolo MI, Thompson K, Martin SS. Pharmacologic regulation of AMPK in breast cancer affects cytoskeletal properties involved with microtentacle formation and re-attachment. Oncotarget 2016; 6:36292-307. [PMID: 26431377 PMCID: PMC4742178 DOI: 10.18632/oncotarget.5345] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 09/11/2015] [Indexed: 01/20/2023] Open
Abstract
The presence of tumor cells in the circulation is associated with a higher risk of metastasis in patients with breast cancer. Circulating breast tumor cells use tubulin-based structures known as microtentacles (McTNs) to re-attach to endothelial cells and arrest in distant organs. McTN formation is dependent on the opposing cytoskeletal forces of stable microtubules and the actin network. AMP-activated protein kinase (AMPK) is a cellular metabolic regulator that can alter actin and microtubule organization in epithelial cells. We report that AMPK can regulate the cytoskeleton of breast cancer cells in both attached and suspended conditions. We tested the effects of AMPK on microtubule stability and the actin-severing protein, cofilin. AMPK inhibition with compound c increased both microtubule stability and cofilin activation, which also resulted in higher McTN formation and re-attachment. Conversely, AMPK activation with A-769662 decreased microtubule stability and cofilin activation with concurrent decreases in McTN formation and cell re-attachment. This data shows for the first time that AMPK shifts the balance of cytoskeletal forces in suspended breast cancer cells, which affect their ability to form McTNs and re-attach. These results support a model where AMPK activators may be used therapeutically to reduce the metastatic efficiency of breast tumor cells.
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Affiliation(s)
- Kristi R Chakrabarti
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.,Graduate Program in Molecular Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Rebecca A Whipple
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Amanda E Boggs
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Lindsay K Hessler
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Lekhana Bhandary
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.,Graduate Program in Molecular Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michele I Vitolo
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.,Graduate Program in Molecular Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Keyata Thompson
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Stuart S Martin
- University of Maryland School of Medicine, Marlene and Stewart Greenebaum National Cancer Institute Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.,Graduate Program in Molecular Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
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50
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Le LTT, Couvet M, Favier B, Coll JL, Nguyen CH, Molla A. Discovery of benzo[e]pyridoindolones as kinase inhibitors that disrupt mitosis exit while erasing AMPK-Thr172 phosphorylation on the spindle. Oncotarget 2016; 6:22152-66. [PMID: 26247630 PMCID: PMC4673153 DOI: 10.18632/oncotarget.4158] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 05/30/2015] [Indexed: 01/09/2023] Open
Abstract
Aurora kinases play an essential role in mitotic progression and are attractive targets in cancer therapy. The first generation of benzo[e]pyridoindole exhibited powerful aurora kinase inhibition but their low solubility limited further development. Grafting a pyperidine-ethoxy group gives rise to a hydrosoluble inhibitor: compound C5M.C5M could efficiently inhibit the proliferation of cells from different origins. C5M prevented cell cycling, induced a strong mitotic arrest then, cells became polyploid and finally died. C5M did not impair the spindle checkpoint, the separation of the sister chromatids and the transfer of aurora B on the mid-zone. C5M prevented histone H3 phosphorylation at mitotic entry and erased AMPK-Thr172 phosphorylation in late mitosis. With this unique profile of inhibition, C5M could be useful for understanding the role of phospho-Thr172-AMPK in abscission and the relationship between the chromosomal complex and the energy sensing machinery.C5M is a multikinase inhibitor with interesting preclinical characteristics: high hydro-solubility and a good stability in plasma. A single dose prevents the expansion of multicellular spheroids. C5M can safely be injected to mice and reduces significantly the development of xenograft. The next step will be to define the protocol of treatment and the cancer therapeutic field of this new anti-proliferative drug.
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Affiliation(s)
- Ly-Thuy-Tram Le
- INSERM UJF U823 Institut Albert Bonniot, Team 5, BP 170, Grenoble Cedex 9, France.,Department of Biotechnology, University of Sciences and Technology, DaNang, Vietnam
| | - Morgane Couvet
- INSERM UJF U823 Institut Albert Bonniot, Team 5, BP 170, Grenoble Cedex 9, France
| | - Bertrand Favier
- Université Joseph Fourier - Grenoble, Team GREPI, Etablissement Français du Sang, BP35, La Tronche France
| | - Jean-Luc Coll
- INSERM UJF U823 Institut Albert Bonniot, Team 5, BP 170, Grenoble Cedex 9, France
| | - Chi-Hung Nguyen
- Institut Curie, PSL Research University, UMR 9187 - U 1196 CNRS-Institut Curie, INSERM, Bat 110 Centre Universitaire, Orsay, France
| | - Annie Molla
- INSERM UJF U823 Institut Albert Bonniot, Team 5, BP 170, Grenoble Cedex 9, France
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