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Alsafh R, Alhashem A, Elsyed A, Yüksel Z, Graiess-Tlili K, Hundallah K, Thabet F, Tabarki B. Multiplex Consanguineous Family Highlights CLASP1 as a Candidate Gene for Lissencephaly. Neurol Genet 2024; 10:e200172. [PMID: 39040917 PMCID: PMC11261580 DOI: 10.1212/nxg.0000000000200172] [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: 05/13/2024] [Accepted: 06/10/2024] [Indexed: 07/24/2024]
Abstract
Background and Objectives Noncentrosomal microtubules are essential cytoskeletal filaments that are important for neurite formation, axonal transport, and neuronal migration. They require stabilization by microtubule minus-end-targeting proteins including the CLASP family of molecules. To date, no human monogenic disorder has been associated with the CLASP1 gene. In this study, we aimed to delineate the clinical and neuroradiologic phenotype associated with biallelic CLASP1 variants. Methods We analyzed clinical characteristics, MRI data, and genotypes of a cohort of 3 patients with homozygous variants in CLASP1. Results Homozygous CLASP1 variant is associated with primary microcephaly, severe neurodevelopmental delay, and early-onset refractory epilepsy. The neuroradiologic phenotype comprises a highly recognizable combination of classic lissencephaly, with the posterior gradient more severe than the anterior gradient, a thin/hypoplastic splenium of the corpus callosum, mild enlargement of the lateral ventricles primarily posteriorly with a squared pattern, and pontine hypoplasia. Discussion This study underscores the role of CLASP1 in brain development and suggests that the identified variant disrupts CLASP1 interaction with the microtubule cytoskeleton, contributing to lissencephaly pathogenesis.
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Affiliation(s)
- Rawan Alsafh
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Amal Alhashem
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Aly Elsyed
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Zafer Yüksel
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Kalthoum Graiess-Tlili
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Khalid Hundallah
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Farah Thabet
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Brahim Tabarki
- From the Division of Pediatric Neurology (R.A., K.H., B.T.); Division of Genetics (A.A.), Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia; Department of Pediatrics (A.E.), King Fahad Military Medical Complex, Dhahran, Saudi Arabia; Bioscientia Human Genetics (Z.Y.), Bioscientia Institut für Medizinische Diagnostik GmbH, Ingelheim, Germany; Department of Radiology (K.G.-T.), Sahloul University Hospital, Sousse; and Department of Pediatrics (F.T.), Fattouma Bourguiba University Hospital, Monastir, Tunisia
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Vien KM, Duan Q, Yeung C, Barish S, Volkan PC. Atypical cadherin, Fat2, regulates axon terminal organization in the developing Drosophila olfactory receptor neurons. iScience 2024; 27:110340. [PMID: 39055932 PMCID: PMC11269957 DOI: 10.1016/j.isci.2024.110340] [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: 12/05/2023] [Revised: 04/08/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024] Open
Abstract
The process of how neuronal identity confers circuit organization is intricately related to the mechanisms underlying neurodegeneration and neuropathologies. Modeling this process, the olfactory circuit builds a functionally organized topographic map, which requires widely dispersed neurons with the same identity to converge their axons into one a class-specific neuropil, a glomerulus. In this article, we identified Fat2 (also known as Kugelei) as a regulator of class-specific axon organization. In fat2 mutants, axons belonging to the highest fat2-expressing classes present with a more severe phenotype compared to axons belonging to low fat2-expressing classes. In extreme cases, mutations lead to neural degeneration. Lastly, we found that Fat2 intracellular domain interactors, APC1/2 (Adenomatous polyposis coli) and dop (Drop out), likely orchestrate the cytoskeletal remodeling required for axon condensation. Altogether, we provide a potential mechanism for how cell surface proteins' regulation of cytoskeletal remodeling necessitates identity specific circuit organization.
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Affiliation(s)
- Khanh M. Vien
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Qichen Duan
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Chun Yeung
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Scott Barish
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Pelin Cayirlioglu Volkan
- Department of Biology, Duke University, Durham, NC 27708, USA
- Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA
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3
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Malaguarnera R, Gabriele C, Santamaria G, Giuliano M, Vella V, Massimino M, Vigneri P, Cuda G, Gaspari M, Belfiore A. Comparative proteomic analysis of insulin receptor isoform A and B signaling. Mol Cell Endocrinol 2022; 557:111739. [PMID: 35940390 DOI: 10.1016/j.mce.2022.111739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 07/17/2022] [Accepted: 07/28/2022] [Indexed: 11/30/2022]
Abstract
The insulin receptor (IR) gene undergoes differential splicing generating two IR isoforms, IR-A and IR-B. The roles of IR-A in cancer and of IR-B in metabolic regulation are well known but the molecular mechanisms responsible for their different biological effects are poorly understood. We aimed to identify different or similar protein substrates and signaling linked to each IR isoforms. We employed mouse fibroblasts lacking IGF1R gene and expressing exclusively either IR-A or IR-B. By proteomic analysis a total of 2530 proteins were identified and quantified. Proteins and pathways mostly associated with insulin-activated IR-A were involved in cancer, stemness and interferon signaling. Instead, proteins and pathways associated with insulin-stimulated IR-B-expressing cells were mostly involved in metabolic or tumor suppressive functions. These results show that IR-A and IR-B recruit partially different multiprotein complexes in response to insulin, suggesting partially different functions of IR isoforms in physiology and in disease.
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Affiliation(s)
| | - Caterina Gabriele
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, "Magna Græcia" University of Catanzaro, 88100, Catanzaro, Italy.
| | - Gianluca Santamaria
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, "Magna Græcia" University of Catanzaro, 88100, Catanzaro, Italy; Klinikum rechts der Isar, Department of Medicine and Molecular Cardiology, Technical University of Munich, Germany.
| | - Marika Giuliano
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122, Catania, Italy.
| | - Veronica Vella
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122, Catania, Italy.
| | - Michele Massimino
- Department of Clinical and Experimental Medicine, Oncology Unit, University of Catania, 95100, Catania, Italy.
| | - Paolo Vigneri
- Department of Clinical and Experimental Medicine, Oncology Unit, University of Catania, 95100, Catania, Italy.
| | - Giovanni Cuda
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, "Magna Græcia" University of Catanzaro, 88100, Catanzaro, Italy.
| | - Marco Gaspari
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, "Magna Græcia" University of Catanzaro, 88100, Catanzaro, Italy.
| | - Antonino Belfiore
- Unit of Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122, Catania, Italy.
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4
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Nakamori M, Shimizu H, Ogawa K, Hasuike Y, Nakajima T, Sakurai H, Araki T, Okada Y, Kakita A, Mochizuki H. Cell type-specific abnormalities of central nervous system in myotonic dystrophy type 1. Brain Commun 2022; 4:fcac154. [PMID: 35770133 PMCID: PMC9218787 DOI: 10.1093/braincomms/fcac154] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 03/13/2022] [Accepted: 06/09/2022] [Indexed: 11/17/2022] Open
Abstract
Myotonic dystrophy type 1 is a multisystem genetic disorder involving the muscle, heart and CNS. It is caused by toxic RNA transcription from expanded CTG repeats in the 3′-untranslated region of DMPK, leading to dysregulated splicing of various genes and multisystemic symptoms. Although aberrant splicing of several genes has been identified as the cause of some muscular symptoms, the pathogenesis of CNS symptoms prevalent in patients with myotonic dystrophy type 1 remains unelucidated, possibly due to a limitation in studying a diverse mixture of different cell types, including neuronal cells and glial cells. Previous studies revealed neuronal loss in the cortex, myelin loss in the white matter and the presence of axonal neuropathy in patients with myotonic dystrophy type 1. To elucidate the CNS pathogenesis, we investigated cell type-specific abnormalities in cortical neurons, white matter glial cells and spinal motor neurons via laser-capture microdissection. We observed that the CTG repeat instability and cytosine–phosphate–guanine (CpG) methylation status varied among the CNS cell lineages; cortical neurons had more unstable and longer repeats with higher CpG methylation than white matter glial cells, and spinal motor neurons had more stable repeats with lower methylation status. We also identified splicing abnormalities in each CNS cell lineage, such as DLGAP1 in white matter glial cells and CAMKK2 in spinal motor neurons. Furthermore, we demonstrated that aberrant splicing of CAMKK2 is associated with abnormal neurite morphology in myotonic dystrophy type 1 motor neurons. Our laser-capture microdissection-based study revealed cell type-dependent genetic, epigenetic and splicing abnormalities in myotonic dystrophy type 1 CNS, indicating the significant potential of cell type-specific analysis in elucidating the CNS pathogenesis.
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Affiliation(s)
- Masayuki Nakamori
- Department of Neurology, Osaka University Graduate School of Medicine , 2-2 Yamadaoka, Suita, Osaka 565-0871 , Japan
- Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University , 1-1 Yamadaoka, Suita, Osaka 565-0871 , Japan
| | - Hiroshi Shimizu
- Department of Pathology, Brain Research Institute, Niigata University , 1-757 Asahimachi, Chuo-ku, Niigata 951-8585 , Japan
| | - Kotaro Ogawa
- Department of Neurology, Osaka University Graduate School of Medicine , 2-2 Yamadaoka, Suita, Osaka 565-0871 , Japan
- Department of Statistical Genetics, Osaka University Graduate School of Medicine , 2-2 Yamadaoka, Suita, Osaka 565-0871 , Japan
| | - Yuhei Hasuike
- Department of Neurology, Osaka University Graduate School of Medicine , 2-2 Yamadaoka, Suita, Osaka 565-0871 , Japan
| | - Takashi Nakajima
- Department of Neurology, National Hospital Organization Niigata National Hospital , 3-52 Akasakamachi, Kashiwazaki, Niigata 945-8585 , Japan
| | - Hidetoshi Sakurai
- Center for iPS Cell Research and Application (CiRA), Kyoto University , 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507 , Japan
| | - Toshiyuki Araki
- Department of Peripheral Nervous System Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry , 4-1-1 Ogawahigashimachi, Kodaira, Tokyo 187-8502 , Japan
| | - Yukinori Okada
- Department of Statistical Genetics, Osaka University Graduate School of Medicine , 2-2 Yamadaoka, Suita, Osaka 565-0871 , Japan
| | - Akiyoshi Kakita
- Department of Pathology, Brain Research Institute, Niigata University , 1-757 Asahimachi, Chuo-ku, Niigata 951-8585 , Japan
| | - Hideki Mochizuki
- Department of Neurology, Osaka University Graduate School of Medicine , 2-2 Yamadaoka, Suita, Osaka 565-0871 , Japan
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5
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Kimmerlin Q, Strassel C, Eckly A, Lanza F. The tubulin code in platelet biogenesis. Semin Cell Dev Biol 2022; 137:63-73. [PMID: 35148939 DOI: 10.1016/j.semcdb.2022.01.010] [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: 05/18/2021] [Revised: 01/12/2022] [Accepted: 01/31/2022] [Indexed: 11/28/2022]
Abstract
Blood platelets are small non-nucleated cellular fragments that prevent and stop hemorrhages. They are produced in the bone marrow by megakaryocytes through megakaryopoiesis. This intricate process involves profound microtubule rearrangements culminating in the formation of a unique circular sub-membranous microtubule array, the marginal band, which supports the typical disc-shaped morphology of platelets. Mechanistically, these processes are thought to be controlled by a specific tubulin code. In this review, we summarize the current knowledge on the key isotypes, notably β1-, α4A- and α8-tubulin, and putative post-translational modifications, involved in platelet and marginal band formation. Additionally, we provide a provisional list of microtubule-associated proteins (MAPs) involved in these processes and a survey of tubulin variants identified in patients presenting defective platelet production. A comprehensive characterization of the platelet tubulin code and the identification of essential MAPs may be expected in the near future to shed new light on a very specialized microtubule assembly process with applications in platelet diseases and transfusion.
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Affiliation(s)
- Quentin Kimmerlin
- Université de Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, Strasbourg, France.
| | - Catherine Strassel
- Université de Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, Strasbourg, France.
| | - Anita Eckly
- Université de Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, Strasbourg, France.
| | - François Lanza
- Université de Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, Strasbourg, France.
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6
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Batty SR, Langlais PR. Microtubules in insulin action: what's on the tube? Trends Endocrinol Metab 2021; 32:776-789. [PMID: 34462181 PMCID: PMC8446328 DOI: 10.1016/j.tem.2021.07.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/23/2021] [Accepted: 07/26/2021] [Indexed: 11/17/2022]
Abstract
Microtubules (MT) have a role in the intracellular response to insulin stimulation and subsequent glucose transport by glucose transporter 4 (GLUT4), which resides in specialized storage vesicles that travel through the cell. Before GLUT4 is inserted into the plasma membrane for glucose transport, it undergoes complex trafficking through the cell via the integration of cytoskeletal networks. In this review, we highlight the importance of MT elements in insulin action in adipocytes through a summary of MT depolymerization studies, MT-based GLUT4 movement, molecular motor proteins involved in GLUT4 trafficking, as well as MT-related phenomena in response to insulin and links between insulin action and MT-associated proteins.
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Affiliation(s)
- Skylar R Batty
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ, USA
| | - Paul R Langlais
- Department of Medicine, Division of Endocrinology, University of Arizona College of Medicine, Tucson, AZ, USA.
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7
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Analysis of Molecular Networks in the Cerebellum in Chronic Schizophrenia: Modulation by Early Postnatal Life Stressors in Murine Models. Int J Mol Sci 2021; 22:ijms221810076. [PMID: 34576238 PMCID: PMC8469990 DOI: 10.3390/ijms221810076] [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: 05/31/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 01/17/2023] Open
Abstract
Despite the growing importance of the cerebellum as a region highly vulnerable to accumulating molecular errors in schizophrenia, limited information is available regarding altered molecular networks with potential therapeutic targets. To identify altered networks, we conducted one-shot liquid chromatography–tandem mass spectrometry in postmortem cerebellar cortex in schizophrenia and healthy individuals followed by bioinformatic analysis (PXD024937 identifier in ProteomeXchange repository). A total of 108 up-regulated proteins were enriched in stress-related proteins, half of which were also enriched in axonal cytoskeletal organization and vesicle-mediated transport. A total of 142 down-regulated proteins showed an enrichment in proteins involved in mitochondrial disease, most of which were also enriched in energy-related biological functions. Network analysis identified a mixed module of mainly axonal-related pathways for up-regulated proteins with a high number of interactions for stress-related proteins. Energy metabolism and neutrophil degranulation modules were found for down-regulated proteins. Further, two double-hit postnatal stress murine models based on maternal deprivation combined with social isolation or chronic restraint stress were used to investigate the most robust candidates of generated networks. CLASP1 from the axonal module in the model of maternal deprivation was combined with social isolation, while YWHAZ was not altered in either model. METTL7A from the degranulation pathway was reduced in both models and was identified as altered also in previous gene expression studies, while NDUFB9 from the energy network was reduced only in the model of maternal deprivation combined with social isolation. This work provides altered stress- and mitochondrial disease-related proteins involved in energy, immune and axonal networks in the cerebellum in schizophrenia as possible novel targets for therapeutic interventions and suggests that METTL7A is a possible relevant altered stress-related protein in this context.
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Marchal GA, Jouni M, Chiang DY, Pérez-Hernández M, Podliesna S, Yu N, Casini S, Potet F, Veerman CC, Klerk M, Lodder EM, Mengarelli I, Guan K, Vanoye CG, Rothenberg E, Charpentier F, Redon R, George AL, Verkerk AO, Bezzina CR, MacRae CA, Burridge PW, Delmar M, Galjart N, Portero V, Remme CA. Targeting the Microtubule EB1-CLASP2 Complex Modulates Na V1.5 at Intercalated Discs. Circ Res 2021; 129:349-365. [PMID: 34092082 PMCID: PMC8298292 DOI: 10.1161/circresaha.120.318643] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Gerard A Marchal
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Mariam Jouni
- Department of Pharmacology, University Feinberg School of Medicine, Chicago, IL (M.J., F.P., C.G.V., A.L.G., P.W.B.)
| | - David Y Chiang
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.Y.C., C.A.M.)
| | | | - Svitlana Podliesna
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Nuo Yu
- Department of Cell Biology, Erasmus Medical Centre Rotterdam, The Netherlands (N.Y., N.G.)
| | - Simona Casini
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Franck Potet
- Department of Pharmacology, University Feinberg School of Medicine, Chicago, IL (M.J., F.P., C.G.V., A.L.G., P.W.B.)
| | - Christiaan C Veerman
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Mischa Klerk
- Department of Medical Biology, Amsterdam UMC - location AMC, The Netherlands (M.K., A.O.V.)
| | - Elisabeth M Lodder
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Isabella Mengarelli
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Kaomei Guan
- Institute of Pharmacology and Toxicology, Technische Universität Dresden, Germany (K.G.)
| | - Carlos G Vanoye
- Department of Pharmacology, University Feinberg School of Medicine, Chicago, IL (M.J., F.P., C.G.V., A.L.G., P.W.B.)
| | - Eli Rothenberg
- Department of Biochemistry and Pharmacology (E.R.), NYU School of Medicine
| | - Flavien Charpentier
- Université de Nantes, CNRS, INSERM, l'institut du Thorax, Nantes, France (F.C., R.R., V.P.)
| | - Richard Redon
- Université de Nantes, CNRS, INSERM, l'institut du Thorax, Nantes, France (F.C., R.R., V.P.)
| | - Alfred L George
- Department of Pharmacology, University Feinberg School of Medicine, Chicago, IL (M.J., F.P., C.G.V., A.L.G., P.W.B.)
| | - Arie O Verkerk
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
- Department of Medical Biology, Amsterdam UMC - location AMC, The Netherlands (M.K., A.O.V.)
| | - Connie R Bezzina
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
| | - Calum A MacRae
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.Y.C., C.A.M.)
| | - Paul W Burridge
- Department of Pharmacology, University Feinberg School of Medicine, Chicago, IL (M.J., F.P., C.G.V., A.L.G., P.W.B.)
| | - Mario Delmar
- Division of Cardiology (M.P.-H., M.D.), NYU School of Medicine
| | - Niels Galjart
- Department of Cell Biology, Erasmus Medical Centre Rotterdam, The Netherlands (N.Y., N.G.)
| | - Vincent Portero
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
- Université de Nantes, CNRS, INSERM, l'institut du Thorax, Nantes, France (F.C., R.R., V.P.)
| | - Carol Ann Remme
- Department of Experimental Cardiology, Amsterdam UMC - location AMC, The Netherlands (G.A.M., S.P., S.C., C.C.V., E.M.L., I.M., A.O.V., C.R.B., V.P., C.A.R.)
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SOGA1 and SOGA2/MTCL1 are CLASP-interacting proteins required for faithful chromosome segregation in human cells. Chromosome Res 2021; 29:159-173. [PMID: 33587225 DOI: 10.1007/s10577-021-09651-8] [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: 12/14/2020] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 10/22/2022]
Abstract
CLASPs are key modulators of microtubule dynamics throughout the cell cycle. During mitosis, CLASPs independently associate with growing microtubule plus-ends and kinetochores and play essential roles in chromosome segregation. In a proteomic survey for human CLASP1-interacting proteins during mitosis, we have previously identified SOGA1 and SOGA2/MTCL1, whose mitotic roles remained uncharacterized. Here we performed an initial functional characterization of human SOGA1 and SOGA2/MTCL1 during mitosis. Using specific polyclonal antibodies raised against SOGA proteins, we confirmed their expression and reciprocal interaction with CLASP1 and CLASP2 during mitosis. In addition, we found that both SOGA1 and SOGA2/MTCL1 are phospho-regulated during mitosis by CDK1. Immunofluorescence analysis revealed that SOGA2/MTCL1 co-localizes with mitotic spindle microtubules and spindle poles throughout mitosis and both SOGA proteins are enriched at the midbody during mitotic exit/cytokinesis. GFP-tagging of SOGA2/MTCL1 further revealed a microtubule-independent localization at kinetochores. Live-cell imaging after siRNA-mediated knockdown of SOGA1 and SOGA2/MTCL1 showed that they are independently required for distinct aspects of chromosome segregation. Thus, SOGA1 and SOGA2/MTCL1 are bona fide CLASP-interacting proteins during mitosis required for faithful chromosome segregation in human cells.
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Huang J, Zhang L, Fang Y, Jiang W, Du J, Zhu J, Hu M, Shen B. Differentially expressed transcripts and associated protein pathways in basilar artery smooth muscle cells of the high-salt intake-induced hypertensive rat. PeerJ 2020; 8:e9849. [PMID: 33083107 PMCID: PMC7566752 DOI: 10.7717/peerj.9849] [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: 04/03/2020] [Accepted: 08/11/2020] [Indexed: 11/20/2022] Open
Abstract
The pathology of cerebrovascular disorders, such as hypertension, is associated with genetic changes and dysfunction of basilar artery smooth muscle cells (BASMCs). Long-term high-salt diets have been associated with the development of hypertension. However, the molecular mechanisms underlying salt-sensitive hypertension-induced BASMC modifications have not been well defined, especially at the level of variations in gene transcription. Here, we utilized high-throughput sequencing and subsequent signaling pathway analyses to find a two–fold change or greater upregulated expression of 203 transcripts and downregulated expression of 165 transcripts in BASMCs derived from rats fed a high-salt diet compared with those from control rats. These differentially expressed transcripts were enriched in pathways involved in cellular, morphological, and structural plasticity, autophagy, and endocrine regulation. These transcripts changes in the BASMCs derived from high-salt intake–induced hypertensive rats may provide critical information about multiple cellular processes and biological functions that occur during the development of cerebrovascular disorders and provide potential new targets to help control or block the development of hypertension.
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Affiliation(s)
- Junhao Huang
- Guangzhou Sport University, Guangdong Provincial Key Laboratory of Sports and Health Promotion, Guangzhou, Guangdong, China
| | - Lesha Zhang
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Yang Fang
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Wan Jiang
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Juan Du
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Jinhang Zhu
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Min Hu
- Guangzhou Sport University, Guangdong Provincial Key Laboratory of Sports and Health Promotion, Guangzhou, Guangdong, China
| | - Bing Shen
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
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HIV-1 Exploits CLASP2 To Induce Microtubule Stabilization and Facilitate Virus Trafficking to the Nucleus. J Virol 2020; 94:JVI.00404-20. [PMID: 32376623 DOI: 10.1128/jvi.00404-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/30/2020] [Indexed: 01/01/2023] Open
Abstract
Human immunodeficiency virus type 1 (HIV-1) exploits a number of specialized microtubule (MT) plus-end tracking proteins (commonly known as +TIPs) to induce the formation of stable microtubules soon after virus entry and promote early stages of infection. However, given their functional diversity, the nature of the +TIPs involved and how they facilitate HIV-1 infection remains poorly understood. Here, we identify cytoplasmic linker-associated protein 2 (CLASP2), a +TIP that captures cortical MT plus ends to enable filament stabilization, as a host factor that enables HIV-1 to induce MT stabilization and promote early infection in natural target cell types. Using fixed- and live-cell imaging in human microglia cells, we further show that CLASP2 is required for the trafficking of incoming HIV-1 particles carrying wild-type (WT) envelope. Moreover, both WT CLASP2 and a CLASP2 mutant lacking its C-terminal domain, which mediates its interaction with several host effector proteins, bind to intact HIV-1 cores or in vitro-assembled capsid-nucleocapsid (CA-NC) complexes. However, unlike WT CLASP2, the CLASP2 C-terminal mutant is unable to induce MT stabilization or promote early HIV-1 infection. Our findings identify CLASP2 as a new host cofactor that utilizes distinct regulatory domains to bind incoming HIV-1 particles and facilitate trafficking of incoming viral cores through MT stabilization.IMPORTANCE While microtubules (MTs) have long been known to be important for delivery of incoming HIV-1 cores to the nucleus, how the virus engages and exploits these filaments remains poorly understood. Our previous work revealed the importance of highly specialized MT regulators that belong to a family called plus-end tracking proteins (+TIPs) in facilitating early stages of infection. These +TIPs perform various functions, such as engaging cargos for transport or engaging peripheral actin to stabilize MTs, suggesting several family members have the potential to contribute to infection in different ways. Here, we reveal that cytoplasmic linker-associated protein 2 (CLASP2), a key regulator of cortical capture and stabilization of MTs, interacts with incoming HIV-1 particles, and we identify a distinct C-terminal domain in CLASP2 that promotes both MT stabilization and early infection. Our findings identify a new +TIP acting as a host cofactor that facilitates early stages of viral infection.
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Abstract
CLIP-associating proteins (CLASPs) form an evolutionarily conserved family of regulatory factors that control microtubule dynamics and the organization of microtubule networks. The importance of CLASP activity has been appreciated for some time, but until recently our understanding of the underlying molecular mechanisms remained basic. Over the past few years, studies of, for example, migrating cells, neuronal development, and microtubule reorganization in plants, along with in vitro reconstitutions, have provided new insights into the cellular roles and molecular basis of CLASP activity. In this Cell Science at a Glance article and the accompanying poster, we will summarize some of these recent advances, emphasizing how they impact our current understanding of CLASP-mediated microtubule regulation.
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Affiliation(s)
- Elizabeth J Lawrence
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Marija Zanic
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
- Department of Chemical and Biomolecular Engineering, and Department of Biochemistry, Vanderbilt University, Nashville, TN 37232, USA
| | - Luke M Rice
- Department of Biophysics and Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX 75390, USA
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