1
|
Léger T, Alilat S, Ferron PJ, Dec L, Bouceba T, Lanceleur R, Huet S, Devriendt-Renault Y, Parinet J, Clément B, Fessard V, Le Hégarat L. Chlordecone-induced hepatotoxicity and fibrosis are mediated by the proteasomal degradation of septins. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135177. [PMID: 39018595 DOI: 10.1016/j.jhazmat.2024.135177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 07/08/2024] [Accepted: 07/09/2024] [Indexed: 07/19/2024]
Abstract
Chlordecone (CLD) is a pesticide persisting in soils and contaminating food webs. CLD is sequestered in the liver and poorly metabolized into chlordecol (CLDOH). In vitro liver cell models were used to investigate the fate and mechanistic effects of CLD and CLDOH using multiomics. A 3D-cell model was used to investigate whether CLD and CLDOH can affect susceptibility to the metabolic dysfunction-associated steatotic liver disease (MASLD). Hepatocytes were more sensitive to CLD than CLDOH. CLDOH was intensively metabolized into a glucuronide conjugate, whereas CLD was sequestered. CLD but not CLDOH induced a depletion of Septin-2,- 7,- 9,- 10,- 11 due to proteasomal degradation. Septin binding with CLD and CLDOH was confirmed by surface plasmon resonance. CLD disrupted lipid droplet size and increased saturated long-chain dicarboxylic acid production by inhibiting stearoyl-CoA desaturase (SCD) abundance. Neither CLD nor CLDOH induced steatosis, but CLD induced fibrosis in the 3D model of MASLD. To conclude, CLD hepatoxicity is specifically driven by the degradation of septins. CLDOH, was too rapidly metabolized to induce septin degradation. We show that the conversion of CLD to CLDOH reduced hepatotoxicity and fibrosis in liver organoids. This suggests that protective strategies could be explored to reduce the hepatotoxicity of CLD.
Collapse
Affiliation(s)
- Thibaut Léger
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France.
| | - Sarah Alilat
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France
| | - Pierre-Jean Ferron
- INSERM, University of Rennes, INRAE, Institut NuMeCan (Nutrition, Metabolisms and Cancer) UMR_A 1317, UMR_S 1241, Previtox Network, 35000 Rennes, France
| | - Léonie Dec
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France
| | - Tahar Bouceba
- Sorbonne University, CNRS, Institut de Biologie Paris-Seine (IBPS), Protein Engineering Platform, Molecular Interaction Service, Paris, France
| | - Rachelle Lanceleur
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France
| | - Sylvie Huet
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France
| | - Yoann Devriendt-Renault
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Pesticides and Marine Biotoxins (PBM) unit, Maison-Alfort Laboratory, 94701 Maison-Alfort CEDEX, France
| | - Julien Parinet
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Pesticides and Marine Biotoxins (PBM) unit, Maison-Alfort Laboratory, 94701 Maison-Alfort CEDEX, France
| | - Bruno Clément
- INSERM, University of Rennes, INRAE, Institut NuMeCan (Nutrition, Metabolisms and Cancer) UMR_A 1317, UMR_S 1241, Previtox Network, 35000 Rennes, France
| | - Valérie Fessard
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France
| | - Ludovic Le Hégarat
- ANSES, French Agency for Food, Environmental and Occupational Health & Safety, Toxicology of Contaminants Unit, Fougères Laboratory, 35306 Fougères CEDEX, France
| |
Collapse
|
2
|
Blua F, Monge C, Gastaldi S, Clemente N, Pizzimenti S, Lazzarato L, Senetta R, Vittorio S, Gigliotti CL, Boggio E, Dianzani U, Vistoli G, Altomare AA, Aldini G, Dianzani C, Marini E, Bertinaria M. Discovery of a septin-4 covalent binder with antimetastatic activity in a mouse model of melanoma. Bioorg Chem 2024; 144:107164. [PMID: 38306824 DOI: 10.1016/j.bioorg.2024.107164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/23/2024] [Accepted: 01/28/2024] [Indexed: 02/04/2024]
Abstract
Cancer spreading through metastatic processes is one of the major causes of tumour-related mortality. Metastasis is a complex phenomenon which involves multiple pathways ranging from cell metabolic alterations to changes in the biophysical phenotype of cells and tissues. In the search for new effective anti-metastatic agents, we modulated the chemical structure of the lead compound AA6, in order to find the structural determinants of activity, and to identify the cellular target responsible of the downstream anti-metastatic effects observed. New compounds synthesized were able to inhibit in vitro B16-F10 melanoma cell invasiveness, and one selected compound, CM365, showed in vivo anti-metastatic effects in a lung metastasis mouse model of melanoma. Septin-4 was identified as the most likely molecular target responsible for these effects. This study showed that CM365 is a promising molecule for metastasis prevention, remarkably effective alone or co-administered with drugs normally used in cancer therapy, such as paclitaxel.
Collapse
Affiliation(s)
- Federica Blua
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Chiara Monge
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Simone Gastaldi
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Nausicaa Clemente
- Settore Centri di Ricerca e Infrastrutture di Ateneo e Laboratori - Polo di NO, University of Piemonte Orientale, Novara, Italy
| | - Stefania Pizzimenti
- Department of Clinical and Biological Science, University of Turin, Torino, Italy
| | - Loretta Lazzarato
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Rebecca Senetta
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Serena Vittorio
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | | | - Elena Boggio
- Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Umberto Dianzani
- Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Giulio Vistoli
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | | | - Giancarlo Aldini
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Chiara Dianzani
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Elisabetta Marini
- Department of Drug Science and Technology, University of Turin, Turin, Italy.
| | - Massimo Bertinaria
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| |
Collapse
|
3
|
Nakazawa K, Chauvin B, Mangenot S, Bertin A. Reconstituted in vitro systems to reveal the roles and functions of septins. J Cell Sci 2023; 136:jcs259448. [PMID: 37815088 DOI: 10.1242/jcs.259448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023] Open
Abstract
Septins are essential cytoskeletal proteins involved in key cellular processes and have also been implicated in diseases from cancers to neurodegenerative pathologies. However, they have not been as thoroughly studied as other cytoskeletal proteins. In vivo, septins interact with other cytoskeletal proteins and with the inner plasma membrane. Hence, bottom-up in vitro cell-free assays are well suited to dissect the roles and behavior of septins in a controlled environment. Specifically, in vitro studies have been invaluable in describing the self-assembly of septins into a large diversity of ultrastructures. Given that septins interact specifically with membrane, the details of these septin-membrane interactions have been analyzed using reconstituted lipid systems. In particular, at a membrane, septins are often localized at curvatures of micrometer scale. In that context, in vitro assays have been performed with substrates of varying curvatures (spheres, cylinders or undulated substrates) to probe the sensitivity of septins to membrane curvature. This Review will first present the structural properties of septins in solution and describe the interplay of septins with cytoskeletal partners. We will then discuss how septins interact with biomimetic membranes and induce their reshaping. Finally, we will highlight the curvature sensitivity of septins and how they alter the mechanical properties of membranes.
Collapse
Affiliation(s)
- Koyomi Nakazawa
- Physico Chimie Curie , Institut Curie, CNRS UMR 168, Sorbonne Université, 11 Rue Pierre et Paris Curie, 75005 Paris, France
| | - Brieuc Chauvin
- Physico Chimie Curie , Institut Curie, CNRS UMR 168, Sorbonne Université, 11 Rue Pierre et Paris Curie, 75005 Paris, France
| | - Stéphanie Mangenot
- Laboratoire Matière et Systèmes Complexes , Université de Paris Cité, CNRS UMR 7057, 45 Rue des Saint Pères, 75006 Paris, France
| | - Aurélie Bertin
- Physico Chimie Curie , Institut Curie, CNRS UMR 168, Sorbonne Université, 11 Rue Pierre et Paris Curie, 75005 Paris, France
| |
Collapse
|
4
|
Gorry RL, Brennan K, Lavin PTM, Mazurski T, Mary C, Matallanas D, Guichou JF, Mc Gee MM. Cyclophilin A Isomerisation of Septin 2 Mediates Abscission during Cytokinesis. Int J Mol Sci 2023; 24:11084. [PMID: 37446263 PMCID: PMC10341793 DOI: 10.3390/ijms241311084] [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: 05/15/2023] [Revised: 06/21/2023] [Accepted: 06/24/2023] [Indexed: 07/15/2023] Open
Abstract
The isomerase activity of Cyclophilin A is important for midbody abscission during cell division, however, to date, midbody substrates remain unknown. In this study, we report that the GTP-binding protein Septin 2 interacts with Cyclophilin A. We highlight a dynamic series of Septin 2 phenotypes at the midbody, previously undescribed in human cells. Furthermore, Cyclophilin A depletion or loss of isomerase activity is sufficient to induce phenotypic Septin 2 defects at the midbody. Structural and molecular analysis reveals that Septin 2 proline 259 is important for interaction with Cyclophilin A. Moreover, an isomerisation-deficient EGFP-Septin 2 proline 259 mutant displays defective midbody localisation and undergoes impaired abscission, which is consistent with data from cells with loss of Cyclophilin A expression or activity. Collectively, these data reveal Septin 2 as a novel interacting partner and isomerase substrate of Cyclophilin A at the midbody that is required for abscission during cytokinesis in cancer cells.
Collapse
Affiliation(s)
- Rebecca L. Gorry
- School of Biomolecular and Biomedical Science (SBBS), Conway Institute, University College Dublin, D04 V1W8 Dublin, Ireland (K.B.)
| | - Kieran Brennan
- School of Biomolecular and Biomedical Science (SBBS), Conway Institute, University College Dublin, D04 V1W8 Dublin, Ireland (K.B.)
| | - Paul T. M. Lavin
- School of Biomolecular and Biomedical Science (SBBS), Conway Institute, University College Dublin, D04 V1W8 Dublin, Ireland (K.B.)
| | - Tayler Mazurski
- School of Biomolecular and Biomedical Science (SBBS), Conway Institute, University College Dublin, D04 V1W8 Dublin, Ireland (K.B.)
| | - Charline Mary
- Centre de Biologie Structurale, CNRS, INSERM, University Montpellier, 34090 Montpellier, France
| | - David Matallanas
- Systems Biology Ireland (SBI), School of Medicine, University College Dublin, D04 V1W8 Dublin, Ireland
| | - Jean-François Guichou
- Centre de Biologie Structurale, CNRS, INSERM, University Montpellier, 34090 Montpellier, France
| | - Margaret M. Mc Gee
- School of Biomolecular and Biomedical Science (SBBS), Conway Institute, University College Dublin, D04 V1W8 Dublin, Ireland (K.B.)
| |
Collapse
|
5
|
Benson A, McMurray M. Simultaneous co-overexpression of Saccharomyces cerevisiae septins Cdc3 and Cdc10 drives pervasive, phospholipid-, and tag-dependent plasma membrane localization. Cytoskeleton (Hoboken) 2023; 80:199-214. [PMID: 37098755 PMCID: PMC10524705 DOI: 10.1002/cm.21762] [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: 12/01/2022] [Revised: 03/29/2023] [Accepted: 04/17/2023] [Indexed: 04/27/2023]
Abstract
Septin proteins contribute to many eukaryotic processes involving cellular membranes. In the budding yeast Saccharomyces cerevisiae, septin hetero-oligomers interact with the plasma membrane (PM) almost exclusively at the future site of cytokinesis. While multiple mechanisms of membrane recruitment have been identified, including direct interactions with specific phospholipids and curvature-sensitive interactions via amphipathic helices, these do not fully explain why yeast septins do not localize all over the inner leaflet of the PM. While engineering an inducible split-yellow fluorescent protein (YFP) system to measure the kinetics of yeast septin complex assembly, we found that ectopic co-overexpression of two tagged septins, Cdc3 and Cdc10, resulted in nearly uniform PM localization, as well as perturbation of endogenous septin function. Septin localization and function in gametogenesis were also perturbed. PM localization required the C-terminal YFP fragment fused to the C terminus of Cdc3, the septin-associated kinases Cla4 and Gin4, and phosphotidylinositol-4,5-bis-phosphate (PI[4,5]P2 ), but not the putative PI(4,5)P2 -binding residues in Cdc3. Endogenous Cdc10 was recruited to the PM, likely contributing to the functional interference. PM-localized septins did not exchange with the cytosolic pool, indicative of stable polymers. These findings provide new clues as to what normally restricts septin localization to specific membranes.
Collapse
Affiliation(s)
- Aleyna Benson
- Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Michael McMurray
- Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| |
Collapse
|
6
|
Miske R, Scharf M, Borowski K, Rieckhoff N, Teegen B, Denno Y, Probst C, Guthke K, Didrihsone I, Wildemann B, Ruprecht K, Komorowski L, Jarius S. Septin-3 autoimmunity in patients with paraneoplastic cerebellar ataxia. J Neuroinflammation 2023; 20:88. [PMID: 36997937 PMCID: PMC10061979 DOI: 10.1186/s12974-023-02718-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 02/03/2023] [Indexed: 04/01/2023] Open
Abstract
BACKGROUND Septins are cytoskeletal proteins with filament forming capabilities, which have multiple roles during cell division, cellular polarization, morphogenesis, and membrane trafficking. Autoantibodies against septin-5 are associated with non-paraneoplastic cerebellar ataxia, and autoantibodies against septin-7 with encephalopathy with prominent neuropsychiatric features. Here, we report on newly identified autoantibodies against septin-3 in patients with paraneoplastic cerebellar ataxia. We also propose a strategy for anti-septin autoantibody determination. METHODS Sera from three patients producing similar immunofluorescence staining patterns on cerebellar and hippocampal sections were subjected to immunoprecipitation followed by mass spectrometry. The identified candidate antigens, all of which were septins, were expressed recombinantly in HEK293 cells either individually, as complexes, or combinations missing individual septins, for use in recombinant cell-based indirect immunofluorescence assays (RC-IIFA). Specificity for septin-3 was further confirmed by tissue IIFA neutralization experiments. Finally, tumor tissue sections were analyzed immunohistochemically for septin-3 expression. RESULTS Immunoprecipitation with rat cerebellum lysate revealed septin-3, -5, -6, -7, and -11 as candidate target antigens. Sera of all three patients reacted with recombinant cells co-expressing septin-3/5/6/7/11, while none of 149 healthy control sera was similarly reactive. In RC-IIFAs the patient sera recognized only cells expressing septin-3, individually and in complexes. Incubation of patient sera with five different septin combinations, each missing one of the five septins, confirmed the autoantibodies' specificity for septin-3. The tissue IIFA reactivity of patient serum was abolished by pre-incubation with HEK293 cell lysates overexpressing the septin-3/5/6/7/11 complex or septin-3 alone, but not with HEK293 cell lysates overexpressing septin-5 as control. All three patients had cancers (2 × melanoma, 1 × small cell lung cancer), presented with progressive cerebellar syndromes, and responded poorly to immunotherapy. Expression of septin-3 was demonstrated in resected tumor tissue available from one patient. CONCLUSIONS Septin-3 is a novel autoantibody target in patients with paraneoplastic cerebellar syndromes. Based on our findings, RC-IIFA with HEK293 cells expressing the septin-3/5/6/7/11 complex may serve as a screening tool to investigate anti-septin autoantibodies in serological samples with a characteristic staining pattern on neuronal tissue sections. Autoantibodies against individual septins can then be confirmed by RC-IIFA expressing single septins.
Collapse
Affiliation(s)
- Ramona Miske
- Institute for Experimental Immunology, affiliated to EUROIMMUN AG, Lübeck, Germany
| | - Madeleine Scharf
- Institute for Experimental Immunology, affiliated to EUROIMMUN AG, Lübeck, Germany.
| | - Kathrin Borowski
- Clinical Immunological Laboratory Prof. Dr. med. Winfried Stöcker, Lübeck, Germany
| | - Nicole Rieckhoff
- Institute for Experimental Immunology, affiliated to EUROIMMUN AG, Lübeck, Germany
| | - Bianca Teegen
- Clinical Immunological Laboratory Prof. Dr. med. Winfried Stöcker, Lübeck, Germany
| | - Yvonne Denno
- Institute for Experimental Immunology, affiliated to EUROIMMUN AG, Lübeck, Germany
| | - Christian Probst
- Institute for Experimental Immunology, affiliated to EUROIMMUN AG, Lübeck, Germany
| | - Kersten Guthke
- Department of Neurology, Städtisches Klinikum Görlitz, Görlitz, Germany
| | - Ieva Didrihsone
- Department of Neurology, Hermann-Josef-Krankenhaus, Erkelenz, Germany
| | - Brigitte Wildemann
- Molecular Neuroimmunology Group, Department of Neurology, University of Heidelberg, Heidelberg, Germany
| | - Klemens Ruprecht
- Department of Neurology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Lars Komorowski
- Institute for Experimental Immunology, affiliated to EUROIMMUN AG, Lübeck, Germany
| | - Sven Jarius
- Molecular Neuroimmunology Group, Department of Neurology, University of Heidelberg, Heidelberg, Germany.
| |
Collapse
|
7
|
Shin SY, Centenera MM, Hodgson JT, Nguyen EV, Butler LM, Daly RJ, Nguyen LK. A Boolean-based machine learning framework identifies predictive biomarkers of HSP90-targeted therapy response in prostate cancer. Front Mol Biosci 2023; 10:1094321. [PMID: 36743211 PMCID: PMC9892654 DOI: 10.3389/fmolb.2023.1094321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/06/2023] [Indexed: 01/20/2023] Open
Abstract
Precision medicine has emerged as an important paradigm in oncology, driven by the significant heterogeneity of individual patients' tumour. A key prerequisite for effective implementation of precision oncology is the development of companion biomarkers that can predict response to anti-cancer therapies and guide patient selection for clinical trials and/or treatment. However, reliable predictive biomarkers are currently lacking for many anti-cancer therapies, hampering their clinical application. Here, we developed a novel machine learning-based framework to derive predictive multi-gene biomarker panels and associated expression signatures that accurately predict cancer drug sensitivity. We demonstrated the power of the approach by applying it to identify response biomarker panels for an Hsp90-based therapy in prostate cancer, using proteomic data profiled from prostate cancer patient-derived explants. Our approach employs a rational feature section strategy to maximise model performance, and innovatively utilizes Boolean algebra methods to derive specific expression signatures of the marker proteins. Given suitable data for model training, the approach is also applicable to other cancer drug agents in different tumour settings.
Collapse
Affiliation(s)
- Sung-Young Shin
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia,Cancer Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia,*Correspondence: Sung-Young Shin, ; Lan K. Nguyen,
| | - Margaret M. Centenera
- South Australian Immunogenomics Cancer Institute and Freemasons Foundation Centre for Men’s Health, University of Adelaide, Adelaide, SA, Australia,South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Joshua T. Hodgson
- South Australian Immunogenomics Cancer Institute and Freemasons Foundation Centre for Men’s Health, University of Adelaide, Adelaide, SA, Australia,South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Elizabeth V. Nguyen
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia,Cancer Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Lisa M. Butler
- South Australian Immunogenomics Cancer Institute and Freemasons Foundation Centre for Men’s Health, University of Adelaide, Adelaide, SA, Australia,South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Roger J. Daly
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia,Cancer Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Lan K. Nguyen
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia,Cancer Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia,*Correspondence: Sung-Young Shin, ; Lan K. Nguyen,
| |
Collapse
|
8
|
Septin 9 and phosphoinositides regulate lysosome localization and their association with lipid droplets. iScience 2022; 25:104288. [PMID: 35573204 PMCID: PMC9097704 DOI: 10.1016/j.isci.2022.104288] [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: 07/26/2021] [Revised: 12/21/2021] [Accepted: 04/20/2022] [Indexed: 11/23/2022] Open
Abstract
The accumulation of lipid droplets (LDs) in the liver is a hallmark of steatosis, which is often associated with lysosomal dysfunction. Nevertheless, the underlying mechanisms remain unclear. Here, using Huh7 cells loaded with oleate as a model to study LD metabolism, we show that cellular content and distribution of LDs are correlated with those of the lysosome and regulated by oleate and septin 9. High expression of septin 9 promotes perinuclear clustering of lysosomes which co-localized with Golgi and not with their surrounding LDs. On the other hand, knockdown of septin 9 disperses the two organelles which colocalize at the cell periphery. The Rab7 is present around these peripheral LDs. PtdIns5P which binds septin 9 and MTMR3 which converts PtdIns(3,5)P2 into PtdIns(5) recapitulates the effects of septin 9. By contrast, PtdIns(3,5)P2 promotes LD/lysosome co-localization. Overall, our data reveal a phosphoinositide/septin 9-dependent mechanism that regulates LD behavior through the control of their association with lysosomes. Septin 9 is regulates oleate-induced lysosome perinuclear clustering Septin 9 and MTs regulate oleate-induced lysosome co-localization with Golgi LDs with high septin 9 have less interaction with Rab7 and LAMP1 PIs have specific effects on LD and lysosome
Collapse
|
9
|
Primary Cilia and Their Role in Acquired Heart Disease. Cells 2022; 11:cells11060960. [PMID: 35326411 PMCID: PMC8946116 DOI: 10.3390/cells11060960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 12/10/2022] Open
Abstract
Primary cilia are non-motile plasma membrane extrusions that display a variety of receptors and mechanosensors. Loss of function results in ciliopathies, which have been strongly linked with congenital heart disease, as well as abnormal development and function of most organ systems. Adults with congenital heart disease have high rates of acquired heart failure, and usually die from a cardiac cause. Here we explore primary cilia’s role in acquired heart disease. Intraflagellar Transport 88 knockout results in reduced primary cilia, and knockout from cardiac endothelium produces myxomatous degeneration similar to mitral valve prolapse seen in adult humans. Induced primary cilia inactivation by other mechanisms also produces excess myocardial hypertrophy and altered scar architecture after ischemic injury, as well as hypertension due to a lack of vascular endothelial nitric oxide synthase activation and the resultant left ventricular dysfunction. Finally, primary cilia have cell-to-cell transmission capacity which, when blocked, leads to progressive left ventricular hypertrophy and heart failure, though this mechanism has not been fully established. Further research is still needed to understand primary cilia’s role in adult cardiac pathology, especially heart failure.
Collapse
|
10
|
Shuman B, Momany M. Septins From Protists to People. Front Cell Dev Biol 2022; 9:824850. [PMID: 35111763 PMCID: PMC8801916 DOI: 10.3389/fcell.2021.824850] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/16/2021] [Indexed: 11/13/2022] Open
Abstract
Septin GTPases form nonpolar heteropolymers that play important roles in cytokinesis and other cellular processes. The ability to form heteropolymers appears to be critical to many septin functions and to have been a major driver of the high conservation of many septin domains. Septins fall into five orthologous groups. Members of Groups 1–4 interact with each other to form heterooligomers and are known as the “core septins.” Representative core septins are present in all fungi and animals so far examined and show positional orthology with monomer location in the heteropolymer conserved within groups. In contrast, members of Group 5 are not part of canonical heteropolymers and appear to interact only transiently, if at all, with core septins. Group 5 septins have a spotty distribution, having been identified in specific fungi, ciliates, chlorophyte algae, and brown algae. In this review we compare the septins from nine well-studied model organisms that span the tree of life (Homo sapiens, Drosophila melanogaster, Schistosoma mansoni, Caenorhabditis elegans, Saccharomyces cerevisiae, Aspergillus nidulans, Magnaporthe oryzae, Tetrahymena thermophila, and Chlamydomonas reinhardtii). We focus on classification, evolutionary relationships, conserved motifs, interfaces between monomers, and positional orthology within heteropolymers. Understanding the relationships of septins across kingdoms can give new insight into their functions.
Collapse
|
11
|
Zheng S, Li H, Feng J, Jiang C, Lin Y, Xie Y, Yu T, Qian X, Yin Z. Complete remission in leptomeningeal metastasis of NSCLC with rare EGFR-SEPT14 fusion treated with osimertinib combined with intrathecal chemotherapy with pemetrexed. Anticancer Drugs 2022; 33:e795-e798. [PMID: 34486539 DOI: 10.1097/cad.0000000000001222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Leptomeningeal metastasis (LM) is one of the most serious complications of non-small cell lung cancer (NSCLC) without standard treatment guidelines and is always accompanied by poor prognosis. Identifying the types of gene mutations is essential to improve the outcome, and an increasing number of rare epidermal growth factor receptor (EGFR) mutations are revealed by next-generation sequencing (NGS). Here, we describe a case of a 56-year-old man who was diagnosed with lung adenocarcinoma and received thoracoscopic resection in May 2015. One year later, LM was confirmed by positive cerebrospinal fluid cytology. Given the existence of EGFR exon 19 deletions, erlotinib was implemented and achieved a short response for 10 months. Then the systemic therapy was changed to osimertinib and obtained clinical remission for 25 months. Owing to the resurgence of violent headache, retching and vomiting, NGS of cerebrospinal fluid was performed and two rare EGFR-SEPT14 fusions were found. Osimertinib combined bevacizumab, chemotherapy (carboplatin and abraxane) and dacomitinib were implemented in turn but ineffective. Thus, osimertinib combined intrathecal chemotherapy with pemetrexed were carried out and gained a complete remission of neurologic symptoms, stable lesions and long-term survival without notable side effects. This study presented the first case of NSCLC-LM harboring particular EGFR-SEPT14 fusions, who showed a durable response to osimertinib and intrathecal pemetrexed, providing a potential therapeutic option for NSCLC-LM patients with this particular mutation.
Collapse
Affiliation(s)
- Shengnan Zheng
- Nanjing Drum Tower Hospital Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu
| | - Huiying Li
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| | - Jie Feng
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| | - Cheng Jiang
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| | - Yongjuan Lin
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| | - Yu Xie
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| | - Tingting Yu
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| | - Xiaoping Qian
- The Comprehensive Cancer Center of Drum Tower Hospital, Clinical Cancer Institute of Nanjing University, Nanjing, China
| | - Zhenyu Yin
- Department of Geriatric Oncology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
| |
Collapse
|
12
|
Alizadeh-Sedigh M, Fazeli MS, Mahmoodzadeh H, Sharif SB, Teimoori-Toolabi L. Methylation of FBN1, SPG20, ITF2, RUNX3, SNCA, MLH1, and SEPT9 genes in circulating cell-free DNA as biomarkers of colorectal cancer. Cancer Biomark 2021; 34:221-250. [PMID: 34957998 DOI: 10.3233/cbm-210315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Investigating aberrant tumor-specific methylation in plasma cell-free DNA provides a promising and noninvasive biomarker for cancer detection. OBJECTIVE We aimed to investigate methylation status of some promoter regions in the plasma and tumor tissues to find biomarkers for early detection of colorectal cancer. METHODS This case-control study on seventy colorectal cancer patients and fifty matched healthy controls used Methylation-Specific High-Resolution Melting Curve analysis to evaluate the methylation of the selected promoter regions in converted genomic tissue DNA and plasma cfDNA. RESULTS The methylation levels in selected regions of SPG20 (+24375 to +24680, +24209 to +24399, and +23625 to +23883), SNCA (+807 to +1013, +7 to +162, and -180 to +7), FBN1 (+223 to +429, +1 to +245, and -18 to -175), ITF2 (+296 to +436 and -180 to +55), SEPT9 (-914412 to -91590 and -99083 to -92264), and MLH1 (-13 to +22) were significantly higher in tumor tissues compared with normal adjacent tissues. The methylation levels of FBN1, ITF2, SNCA, and SPG20 promoters were significantly higher in the patient's plasma compared to patient's normal tissue and plasma of healthy control subjects. FBN1, SPG20, and SEPT9 promoter methylation had a good diagnostic performance for discriminating CRC tissues from normal adjacent tissues (AUC > 0.8). A panel of SPG20, FBN1, and SEPT9 methylation had a higher diagnostic value than that of any single biomarker and other panels in tissue-based assay (AUC > 0.9). The methylation of FBN1(a) and SPG20(a) regions, as the closest region to the first coding sequence (CDS), had a good diagnostic performance in plasma cfDNA (AUC > 0.8) while a panel consisted of FBN1(a) and SPG20(a) regions showed excellent diagnostic performance for CRC detection in plasma cfDNA (AUC > 0.9). CONCLUSION Methylation of FBN1(a) and SPG20(a) promoter regions in the plasma cfDNA can be an excellent simple, non-invasive blood-based test for early detection of CRC.
Collapse
Affiliation(s)
- Maryam Alizadeh-Sedigh
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Sadegh Fazeli
- Department of Surgery, Division of Colorectal Surgery, Imam Khomeini Medical Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Habibollah Mahmoodzadeh
- Cancer Institute of Iran, Imam Khomeini Medical Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahin Behrouz Sharif
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Ladan Teimoori-Toolabi
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| |
Collapse
|
13
|
Cavini IA, Leonardo DA, Rosa HVD, Castro DKSV, D'Muniz Pereira H, Valadares NF, Araujo APU, Garratt RC. The Structural Biology of Septins and Their Filaments: An Update. Front Cell Dev Biol 2021; 9:765085. [PMID: 34869357 PMCID: PMC8640212 DOI: 10.3389/fcell.2021.765085] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/27/2021] [Indexed: 01/22/2023] Open
Abstract
In order to fully understand any complex biochemical system from a mechanistic point of view, it is necessary to have access to the three-dimensional structures of the molecular components involved. Septins and their oligomers, filaments and higher-order complexes are no exception. Indeed, the spontaneous recruitment of different septin monomers to specific positions along a filament represents a fascinating example of subtle molecular recognition. Over the last few years, the amount of structural information available about these important cytoskeletal proteins has increased dramatically. This has allowed for a more detailed description of their individual domains and the different interfaces formed between them, which are the basis for stabilizing higher-order structures such as hexamers, octamers and fully formed filaments. The flexibility of these structures and the plasticity of the individual interfaces have also begun to be understood. Furthermore, recently, light has been shed on how filaments may bundle into higher-order structures by the formation of antiparallel coiled coils involving the C-terminal domains. Nevertheless, even with these advances, there is still some way to go before we fully understand how the structure and dynamics of septin assemblies are related to their physiological roles, including their interactions with biological membranes and other cytoskeletal components. In this review, we aim to bring together the various strands of structural evidence currently available into a more coherent picture. Although it would be an exaggeration to say that this is complete, recent progress seems to suggest that headway is being made in that direction.
Collapse
Affiliation(s)
- Italo A Cavini
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Diego A Leonardo
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Higor V D Rosa
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Danielle K S V Castro
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil.,São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | | | | | - Ana P U Araujo
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Richard C Garratt
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| |
Collapse
|
14
|
Rimmer MP, Gregory CD, Mitchell RT. Extracellular vesicles in urological malignancies. Biochim Biophys Acta Rev Cancer 2021; 1876:188570. [PMID: 34019971 PMCID: PMC8351753 DOI: 10.1016/j.bbcan.2021.188570] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/10/2021] [Accepted: 05/13/2021] [Indexed: 12/11/2022]
Abstract
Extracellular vesicles (EVs) are small lipid bound structures released from cells containing bioactive cargoes. Both the type of cargo and amount loaded varies compared to that of the parent cell. The characterisation of EVs in cancers of the male urogenital tract has identified several cargoes with promising diagnostic and disease monitoring potential. EVs released by cancers of the male urogenital tract promote cell-to-cell communication, migration, cancer progression and manipulate the immune system promoting metastasis by evading the immune response. Their use as diagnostic biomarkers represents a new area of screening and disease detection, potentially reducing the need for invasive biopsies. Many validated EV cargoes have been found to have superior sensitivity and specificity than current diagnostic tools currently in use. The use of EVs to improve disease monitoring and develop novel therapeutics will enable clinicians to individualise patient management in the exciting era of personalised medicine.
Collapse
Affiliation(s)
- Michael P Rimmer
- MRC Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, UK.
| | - Christopher D Gregory
- Centre for Inflammation Research, Queens Medical Research Institute, University of Edinburgh, UK
| | - Rod T Mitchell
- MRC Centre for Reproductive Health, Queens Medical Research Institute, University of Edinburgh, UK.
| |
Collapse
|
15
|
Salameh J, Cantaloube I, Benoit B, Poüs C, Baillet A. Cdc42 and its BORG2 and BORG3 effectors control the subcellular localization of septins between actin stress fibers and microtubules. Curr Biol 2021; 31:4088-4103.e5. [PMID: 34329591 DOI: 10.1016/j.cub.2021.07.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 05/28/2021] [Accepted: 07/02/2021] [Indexed: 01/22/2023]
Abstract
Cell resistance to taxanes involves several complementary mechanisms, among which septin relocalization from actin stress fibers to microtubules plays an early role. By investigating the molecular mechanism underlying this relocalization, we found that acute paclitaxel treatment triggers the release from stress fibers and subsequent proteasome-mediated degradation of binder of Rho GTPases 2 (BORG2)/Cdc42 effector protein 3 (Cdc42EP3) and to a lesser extent of BORG3/Cdc42EP5, two Cdc42 effectors that link septins to actin in interphase cells. BORG2 or BORG3 silencing not only caused septin detachment from stress fibers but also mimicked the effects of paclitaxel by triggering both septin relocalization to microtubules and significant drug resistance. Conversely, BORG2 or BORG3 overexpression retained septins on actin fibers even after paclitaxel treatment, without affecting paclitaxel sensitivity. We found that drug-induced inhibition of Cdc42 resulted in a drop in BORG2 level and in the relocalization of septins to microtubules. Accordingly, although septins relocalized when overexpressing an inactive mutant of Cdc42, the expression of a constitutively active mutant acted locally at actin stress fibers to prevent septin release, even after paclitaxel treatment. These findings reveal the role of Cdc42 upstream of BORG2 and BORG3 in controlling the interplay between septins, actin fibers, and microtubules in basal condition and in response to taxanes.
Collapse
Affiliation(s)
- Joëlle Salameh
- INSERM UMR-S 1193, Faculté de Pharmacie, Université Paris-Saclay, Châtenay-Malabry, France
| | - Isabelle Cantaloube
- INSERM UMR-S 1193, Faculté de Pharmacie, Université Paris-Saclay, Châtenay-Malabry, France
| | - Béatrice Benoit
- INSERM UMR-S 1193, Faculté de Pharmacie, Université Paris-Saclay, Châtenay-Malabry, France
| | - Christian Poüs
- INSERM UMR-S 1193, Faculté de Pharmacie, Université Paris-Saclay, Châtenay-Malabry, France; Laboratoire de Biochimie-Hormonologie, Hôpital Antoine Béclère, AP-HP, Clamart, France.
| | - Anita Baillet
- INSERM UMR-S 1193, Faculté de Pharmacie, Université Paris-Saclay, Châtenay-Malabry, France.
| |
Collapse
|
16
|
Shen S, Wei Y, Li Y, Duan W, Dong X, Lin L, You D, Tardon A, Chen C, Field JK, Hung RJ, Liu G, Zhu D, Amos CI, Su L, Zhao Y, Hu Z, Shen H, Zhang R, Chen F, Christiani DC. A multi-omics study links TNS3 and SEPT7 to long-term former smoking NSCLC survival. NPJ Precis Oncol 2021; 5:39. [PMID: 34002017 PMCID: PMC8128887 DOI: 10.1038/s41698-021-00182-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 03/19/2021] [Indexed: 11/15/2022] Open
Abstract
The genetic architecture of non-small cell lung cancer (NSCLC) is relevant to smoking status. However, the genetic contribution of long-term smoking cessation to the prognosis of NSCLC patients remains largely unknown. We conducted a genome-wide association study primarily on the prognosis of 1299 NSCLC patients of long-term former smokers from independent discovery (n = 566) and validation (n = 733) sets, and used in-silico function prediction and multi-omics analysis to identify single nucleotide polymorphisms (SNPs) on prognostics with NSCLC. We further detected SNPs with at least moderate association strength on survival within each group of never, short-term former, long-term former, and current smokers, and compared their genetic similarity at the SNP, gene, expression quantitative trait loci (eQTL), enhancer, and pathway levels. We identified two SNPs, rs34211819TNS3 at 7p12.3 (P = 3.90 × 10-9) and rs1143149SEPT7 at 7p14.2 (P = 9.75 × 10-9), were significantly associated with survival of NSCLC patients who were long-term former smokers. Both SNPs had significant interaction effects with years of smoking cessation (rs34211819TNS3: Pinteraction = 8.0 × 10-4; rs1143149SEPT7: Pinteraction = 0.003). In addition, in silico function prediction and multi-omics analysis provided evidence that these QTLs were associated with survival. Moreover, comparison analysis found higher genetic similarity between long-term former smokers and never-smokers, compared to short-term former smokers or current smokers. Pathway enrichment analysis indicated a unique pattern among long-term former smokers that was related to immune pathways. This study provides important insights into the genetic architecture associated with long-term former smoking NSCLC.
Collapse
Affiliation(s)
- Sipeng Shen
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Yongyue Wei
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Yi Li
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Weiwei Duan
- Department of Bioinformatics, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Xuesi Dong
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA
| | - Lijuan Lin
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA
| | - Dongfang You
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA
| | - Adonina Tardon
- University of Oviedo and CIBERESP, Faculty of Medicine, Oviedo, 33003, Spain
| | - Chu Chen
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, 98109, USA
| | - John K Field
- Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Rayjean J Hung
- Prosserman Centre for Population Health Research, Lunenfeld-Tanenbaum Research Institute, Sinai Health System and University of Toronto, Toronto, ON, M5T 3L9, Canada
| | - Geoffrey Liu
- Princess Margaret Cancer Centre, Toronto, ON, M5G 2C1, Canada
| | - Dakai Zhu
- Department of Medicine, Epidemiology Section, Institute for Clinical and Translational Research, Baylor Medical College, Houston, TX, 77030, USA
| | - Christopher I Amos
- Department of Medicine, Epidemiology Section, Institute for Clinical and Translational Research, Baylor Medical College, Houston, TX, 77030, USA
| | - Li Su
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA
| | - Yang Zhao
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Zhibin Hu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Department of Epidemiology, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Hongbing Shen
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Department of Epidemiology, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Ruyang Zhang
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
| | - Feng Chen
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
- China International Cooperation Center of Environment and Human Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
| | - David C Christiani
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA.
- Pulmonary and Critical Care Division, Massachusetts General Hospital, Department of Medicine, Harvard Medical School, Boston, MA, 02114, USA.
| |
Collapse
|
17
|
Kim B, Kim Y, Park I, Cho JY, Lee KA. Detection of EGFR-SEPT14 fusion in cell-free DNA of a patient with advanced gastric cancer: A case report. World J Clin Cases 2021; 9:2884-2889. [PMID: 33969073 PMCID: PMC8058666 DOI: 10.12998/wjcc.v9.i12.2884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/02/2021] [Accepted: 03/03/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Gastric cancer is the fifth most diagnosed cancer worldwide and the third most common cause of cancer-related death. In recent decades, increasing application of next-generation sequencing has enabled detection of molecular aberrations, including fusions. In cases where tissue is difficult to obtain, cell-free DNA (cfDNA) is used for detecting mutations to identify the molecular profile of cancer. Here, we report a rare case of EGFR-SEPT14 fusion detected from cfDNA analysis in a patient with gastric cancer.
CASE SUMMARY A 49-year-old female diagnosed with advanced gastric cancer in July 2019 received capecitabine and then combination chemotherapy of ramucirumab and paclitaxel, but ascites was detected. The therapy was switched to nivolumab, but disease progression was observed on a positron emission tomography/computed tomography scan in May 2020. Therapy was discontinued, and cfDNA next-generation sequencing was immediately evaluated. All genomic variants, including fusions, were analyzed from cfDNA. The following somatic alterations were detected from the patient’s cfDNA: an APC frameshift mutation (NM_000038.5:c.6579del, p.V2194fs) with variant allele frequency of 0.5%, an EGFR amplification with a copy number of 17.3, and an EGFR-SEPT14 fusion with variant allele frequency of 45.3%. The site of the fusion was exon 24 of EGFR fused to exon 10 of SEPT14. The fusion was in-frame and considered to be protooncogenic. Although the patient refused to continue therapy, we suggest that EGFR-targeted therapies be tried in such future cases.
CONCLUSION The expanded applications of the cfDNA assay may open a new horizon in treatment of patients with advanced gastric cancer.
Collapse
Affiliation(s)
- Boyeon Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 03722, South Korea
- Department of Laboratory Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea
| | - Yoonjung Kim
- Department of Laboratory Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea
| | - Inho Park
- Center for Precision Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea
| | - Jae Yong Cho
- Division of Medical Oncology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea
| | - Kyung-A Lee
- Department of Laboratory Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea
| |
Collapse
|
18
|
Septins in Infections: Focus on Viruses. Pathogens 2021; 10:pathogens10030278. [PMID: 33801245 PMCID: PMC8001386 DOI: 10.3390/pathogens10030278] [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: 01/15/2021] [Revised: 02/17/2021] [Accepted: 02/25/2021] [Indexed: 11/17/2022] Open
Abstract
Human septins comprise a family of 13 genes that encode conserved GTP-binding proteins. They form nonpolar complexes, which assemble into higher-order structures, such as bundles, scaffolding structures, or rings. Septins are counted among the cytoskeletal elements. They interact with the actin and microtubule networks and can bind to membranes. Many cellular functions with septin participation have been described in the literature, including cytokinesis, motility, forming of scaffolding platforms or lateral diffusion barriers, vesicle transport, exocytosis, and recognition of micron-scale curvature. Septin dysfunction has been implicated in diverse human pathologies, including neurodegeneration and tumorigenesis. Moreover, septins are thought to affect the outcome of host–microbe interactions. Implication of septins has been demonstrated in fungal, bacterial, and viral infections. Knowledge on the precise function of a particular septin in the different steps of the virus infection and replication cycle is still limited. Published data for vaccinia virus (VACV), hepatitis C virus (HCV), influenza A virus (H1N1 and H5N1), human herpesvirus 8 (HHV-8), and Zika virus (ZIKV), all of major concern for public health, will be discussed here.
Collapse
|
19
|
Dulal N, Rogers AM, Proko R, Bieger BD, Liyanage R, Krishnamurthi VR, Wang Y, Egan MJ. Turgor-dependent and coronin-mediated F-actin dynamics drive septin disc-to-ring remodeling in the blast fungus Magnaporthe oryzae. J Cell Sci 2021; 134:jcs.251298. [PMID: 33414165 DOI: 10.1242/jcs.251298] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 12/16/2020] [Indexed: 12/16/2022] Open
Abstract
The fungus Magnaporthe oryzae uses a specialized pressure-generating infection cell called an appressorium to break into rice leaves and initiate disease. Appressorium functionality is dependent on the formation of a cortical septin ring during its morphogenesis, but precisely how this structure assembles is unclear. Here, we show that F-actin rings are recruited to the circumference of incipient septin disc-like structures in a pressure-dependent manner, and that this is necessary for their contraction and remodeling into rings. We demonstrate that the structural integrity of these incipient septin discs requires both an intact F-actin and microtubule cytoskeleton and provide fundamental new insight into their functional organization within the appressorium. Lastly, using proximity-dependent labeling, we identify the actin modulator coronin as a septin-proximal protein and show that F-actin-mediated septin disc-to-ring remodeling is perturbed in the genetic absence of coronin. Taken together, our findings provide new insight into the dynamic remodeling of infection-specific higher-order septin structures in a globally significant fungal plant pathogen.
Collapse
Affiliation(s)
- Nawaraj Dulal
- Department of Entomology and Plant Pathology, University of Arkansas Systems Division of Agriculture, Fayetteville, AR 72701, USA
| | - Audra Mae Rogers
- Department of Entomology and Plant Pathology, University of Arkansas Systems Division of Agriculture, Fayetteville, AR 72701, USA
| | - Rinalda Proko
- Department of Entomology and Plant Pathology, University of Arkansas Systems Division of Agriculture, Fayetteville, AR 72701, USA.,Cell and Molecular Biology graduate program, University of Arkansas, Fayetteville, AR 72701, USA
| | - Baronger Dowell Bieger
- Department of Entomology and Plant Pathology, University of Arkansas Systems Division of Agriculture, Fayetteville, AR 72701, USA.,Cell and Molecular Biology graduate program, University of Arkansas, Fayetteville, AR 72701, USA
| | - Rohana Liyanage
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | | | - Yong Wang
- Cell and Molecular Biology graduate program, University of Arkansas, Fayetteville, AR 72701, USA.,Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA.,Microelectronics-Photonics graduate program, University of Arkansas, Fayetteville, AR 72701, USA
| | - Martin John Egan
- Department of Entomology and Plant Pathology, University of Arkansas Systems Division of Agriculture, Fayetteville, AR 72701, USA .,Cell and Molecular Biology graduate program, University of Arkansas, Fayetteville, AR 72701, USA
| |
Collapse
|
20
|
Saksis R, Silamikelis I, Laksa P, Megnis K, Peculis R, Mandrika I, Rogoza O, Petrovska R, Balcere I, Konrade I, Steina L, Stukens J, Breiksa A, Nazarovs J, Sokolovska J, Pirags V, Klovins J, Rovite V. Medication for Acromegaly Reduces Expression of MUC16, MACC1 and GRHL2 in Pituitary Neuroendocrine Tumour Tissue. Front Oncol 2021; 10:593760. [PMID: 33680922 PMCID: PMC7928352 DOI: 10.3389/fonc.2020.593760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 12/11/2020] [Indexed: 12/11/2022] Open
Abstract
Acromegaly is a disease mainly caused by pituitary neuroendocrine tumor (PitNET) overproducing growth hormone. First-line medication for this condition is the use of somatostatin analogs (SSAs), that decrease tumor mass and induce antiproliferative effects on PitNET cells. Dopamine agonists (DAs) can also be used if SSA treatment is not effective. This study aimed to determine differences in transcriptome signatures induced by SSA/DA therapy in PitNET tissue. We selected tumor tissue from twelve patients with somatotropinomas, with half of the patients receiving SSA/DA treatment before surgery and the other half treatment naive. Transcriptome sequencing was then carried out to identify differentially expressed genes (DEGs) and their protein–protein interactions, using pathway analyses. We found 34 upregulated and six downregulated DEGs in patients with SSA/DA treatment. Three tumor development promoting factors MUC16, MACC1, and GRHL2, were significantly downregulated in therapy administered PitNET tissue; this finding was supported by functional studies in GH3 cells. Protein–protein interactions and pathway analyses revealed extracellular matrix involvement in the antiproliferative effects of this type of the drug treatment, with pronounced alterations in collagen regulation. Here, we have demonstrated that somatotropinomas can be distinguished based on their transcriptional profiles following SSA/DA therapy, and SSA/DA treatment does indeed cause changes in gene expression. Treatment with SSA/DA significantly downregulated several factors involved in tumorigenesis, including MUC16, MACC1, and GRHL2. Genes that were upregulated, however, did not have a direct influence on antiproliferative function in the PitNET cells. These findings suggested that SSA/DA treatment acted in a tumor suppressive manner and furthermore, collagen related interactions and pathways were enriched, implicating extracellular matrix involvement in this anti-tumor effect of drug treatment.
Collapse
Affiliation(s)
- Rihards Saksis
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | | | - Pola Laksa
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | - Kaspars Megnis
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | - Raitis Peculis
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | - Ilona Mandrika
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | - Olesja Rogoza
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | | | - Inga Balcere
- Riga East Clinical University Hospital, Riga, Latvia.,Riga Stradins University, Riga, Latvia
| | - Ilze Konrade
- Riga East Clinical University Hospital, Riga, Latvia.,Riga Stradins University, Riga, Latvia
| | - Liva Steina
- Pauls Stradins Clinical University Hospital, Riga, Latvia
| | - Janis Stukens
- Pauls Stradins Clinical University Hospital, Riga, Latvia
| | - Austra Breiksa
- Pauls Stradins Clinical University Hospital, Riga, Latvia
| | | | | | - Valdis Pirags
- Pauls Stradins Clinical University Hospital, Riga, Latvia.,University of Latvia Faculty of Medicine, Riga, Latvia
| | - Janis Klovins
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| | - Vita Rovite
- Latvian Biomedical Research and Study Centre, Riga, Latvia
| |
Collapse
|
21
|
Zhao Q, Zhao R, Song C, Wang H, Rong J, Wang F, Yan L, Song Y, Xie Y. Increased IGFBP7 Expression Correlates with Poor Prognosis and Immune Infiltration in Gastric Cancer. J Cancer 2021; 12:1343-1355. [PMID: 33531979 PMCID: PMC7847654 DOI: 10.7150/jca.50370] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 12/04/2020] [Indexed: 12/24/2022] Open
Abstract
Background: Insulin-like growth factor binding protein-7 (IGFBP7) contributes to multiple biological processes in various tumors. However, the role of IGFBP7 in gastric cancer (GC) is still undetermined. The study aims to explore the role of IGFBP7 in GC via an integrated bioinformatics analysis. Methods: IGFBP7 expression levels in GC and its normal gastric tissues were analyzed using multiple databases, including the Tumor Immune Estimation Resource (TIMER), Oncomine, The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) databases, as well as by our clinical gastric specimens. The methylation analysis was conducted with MEXPRESS, UALCAN and Xena online tools. The survival analysis was conducted using the Kaplan-Meier Plotter and Gene Expression Profiling Interactive Analysis (GEPIA) databases. Coexpressed genes of IGFBP7 were selected with the cBioPortal tool and enrichment analysis was conducted with the clusterProfiler package in R software. Gene set enrichment analysis (GSEA) was performed to explore the IGFBP7-related biological processes involved in GC. Correlations between IGFBP7 and immune cell infiltrates were analyzed using the TIMER database. Results: IGFBP7 expression was significantly upregulated in GC and correlated with stage, grade, tumor status and Helicobacter pylori infection. High IGFBP7 expression and low IGFBP7 methylation levels were significantly associated with short survival of patients with GC. Univariate and multivariate analyses revealed that IGFBP7 was an independent risk factor for GC. The coexpressed genes LHFPL6, SEPTIN4, HSPB2, LAYN and GGT5 predicted unfavorable outcomes of GC. Enrichment analysis showed that the coexpressed genes were involved in extracellular matrix (ECM)-related processes. GSEA indicated that IGFBP7 was positively related to ECM and inflammation-related pathways. TIMER analysis indicated that the mRNA level of IGFBP7 was strongly correlated with genes related to various infiltrating immune cells in GC, especially with gene markers of tumor associated macrophages (TAMs). Conclusions: Increased IGFBP7 expression correlates with poor prognosis and immune cell infiltration in GC, which might be a potential biomarker for the diagnosis of GC.
Collapse
Affiliation(s)
- Qiaoyun Zhao
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Rulin Zhao
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Conghua Song
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Huan Wang
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Jianfang Rong
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Fangfei Wang
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Lili Yan
- Laboratory of Biochemistry and Molecular Biology, Jiangxi Institute of Medical Sciences, Nanchang 330000, Jiangxi Province, China
| | - Yanping Song
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| | - Yong Xie
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, No.17, Yongwai Zheng Street, Donghu District, Nanchang, 330000, Jiangxi, China
| |
Collapse
|
22
|
Ah-Pine F, Casas D, Menei P, Boisselier B, Garcion E, Rousseau A. RNA-sequencing of IDH-wild-type glioblastoma with chromothripsis identifies novel gene fusions with potential oncogenic properties. Transl Oncol 2021; 14:100884. [PMID: 33074125 PMCID: PMC7569239 DOI: 10.1016/j.tranon.2020.100884] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/16/2020] [Accepted: 09/21/2020] [Indexed: 12/12/2022] Open
Abstract
Glioblastoma (GBM) is the most frequent and most aggressive form of glioma. It is characterized by marked genomic instability, which suggests that chromothripsis (CT) might be involved in GBM initiation. Recently, CT has emerged as an alternative mechanism of cancer development, involving massive chromosome rearrangements in a one-step catastrophic event. The aim of the study was to detect CT in GBM and identify novel gene fusions in CT regions. One hundred and seventy IDH-wild-type GBM were screened for CT patterns using whole-genome single nucleotide polymorphism (SNP) arrays. RNA sequencing was performed in 52 GBM with CT features to identify gene fusions within CT regions. Forty tumors (40/52, 77%) harbored at least one gene fusion within CT regions. We identified 120 candidate gene fusions, 30 of which with potential oncogenic activities. We validated 11 gene fusions, which involved the most recurrent fusion partners (EGFR, SEPT14, VOPP1 and CPM), by RT-PCR and Sanger sequencing. The occurrence of CT points to underlying gene fusions in IDH-wild-type GBM. CT provides exciting new research avenues in this highly aggressive cancer.
Collapse
Key Words
- baf, b-allele frequency
- chr, chromosome
- cna, copy number alteration
- cns, central nervous system
- ct, chromothripsis
- fpkm, fragments per kilobase of exon per million fragments mapped
- gbm, glioblastoma multiform
- hd, homozygous deletion
- loh, loss of heterozygosity
- rna-seq, rna sequencing
- rt-pcr, reverse transcriptase – polymerase chain reaction
- snp, single nucleotide polymorphism
- who, world health organization
Collapse
Affiliation(s)
- Franck Ah-Pine
- Département de Pathologie Cellulaire et Tissulaire, CHU Angers, 4 rue Larrey, 49100 Angers, France
| | - Déborah Casas
- CRCINA, INSERM, Université de Nantes, Université d'Angers, 4 rue Larrey, 49100 Angers, France.
| | - Philippe Menei
- Département de Neurochirurgie, CHU Angers, 4 rue Larrey, 49100 Angers, France.
| | - Blandine Boisselier
- Département de Pathologie Cellulaire et Tissulaire, CHU Angers, 4 rue Larrey, 49100 Angers, France; CRCINA, INSERM, Université de Nantes, Université d'Angers, 4 rue Larrey, 49100 Angers, France
| | - Emmanuel Garcion
- CRCINA, INSERM, Université de Nantes, Université d'Angers, 4 rue Larrey, 49100 Angers, France.
| | - Audrey Rousseau
- Département de Pathologie Cellulaire et Tissulaire, CHU Angers, 4 rue Larrey, 49100 Angers, France; CRCINA, INSERM, Université de Nantes, Université d'Angers, 4 rue Larrey, 49100 Angers, France.
| |
Collapse
|
23
|
DeRose BT, Kelley RS, Ravi R, Kokona B, Beld J, Spiliotis ET, Padrick SB. Production and analysis of a mammalian septin hetero-octamer complex. Cytoskeleton (Hoboken) 2020; 77:485-499. [PMID: 33185030 DOI: 10.1002/cm.21643] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/26/2020] [Accepted: 11/08/2020] [Indexed: 01/19/2023]
Abstract
The septins are filament-forming proteins found in diverse eukaryotes from fungi to vertebrates, with roles in cytokinesis, shaping of membranes and modifying cytoskeletal organization. These GTPases assemble into rod-shaped soluble hetero-hexamers and hetero-octamers in mammals, which polymerize into filaments and higher order structures. While the cell biology and pathobiology of septins are advancing rapidly, mechanistic study of the mammalian septins is limited by a lack of recombinant hetero-octamer materials. We describe here the production and characterization of a recombinant mammalian septin hetero-octamer of defined stoichiometry, the SEPT2/SEPT6/SEPT7/SEPT3 complex. Using a fluorescent protein fusion to the complex, we observed filaments assembled from this complex. In addition, we used this novel tool to resolve recent questions regarding the organization of the soluble septin complex. Biochemical characterization of a SEPT3 truncation that disrupts SEPT3-SEPT3 interactions is consistent with SEPT3 occupying a central position in the complex while the SEPT2 subunits are at the ends of the rod-shaped octameric complexes. Consistent with SEPT2 being on the complex ends, we find that our purified SEPT2/SEPT6/SEPT7/SEPT3 hetero-octamer copolymerizes into mixed filaments with separately purified SEPT2/SEPT6/SEPT7 hetero-hexamer. We expect this new recombinant production approach to lay essential groundwork for future studies into mammalian septin mechanism and function.
Collapse
Affiliation(s)
- Barry T DeRose
- Department of Biochemistry and Molecular Biology, Drexel University, Philadelphia, Pennsylvania, USA
| | - Robert S Kelley
- Department of Biochemistry and Molecular Biology, Drexel University, Philadelphia, Pennsylvania, USA.,VCU Health System, Richmond, Virginia, USA
| | - Roshni Ravi
- Department of Biochemistry and Molecular Biology, Drexel University, Philadelphia, Pennsylvania, USA.,WuXi Advanced Therapies, Philadelphia, Pennsylvania, USA
| | - Bashkim Kokona
- Department of Chemistry, Haverford College, Haverford, Pennsylvania, USA
| | - Joris Beld
- Department of Microbiology and Immunology, Drexel University, Philadelphia, Pennsylvania, USA
| | - Elias T Spiliotis
- Department of Biology, Drexel University, Philadelphia, Pennsylvania, USA
| | - Shae B Padrick
- Department of Biochemistry and Molecular Biology, Drexel University, Philadelphia, Pennsylvania, USA
| |
Collapse
|
24
|
Lin YH, Huang CY, Ke CC, Wang YY, Lai TH, Liu HC, Ku WC, Chan CC, Lin YH. ACTN4 Mediates SEPT14 Mutation-Induced Sperm Head Defects. Biomedicines 2020; 8:biomedicines8110518. [PMID: 33228246 PMCID: PMC7699536 DOI: 10.3390/biomedicines8110518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/13/2020] [Accepted: 11/17/2020] [Indexed: 12/22/2022] Open
Abstract
Septins (SEPTs) are highly conserved GTP-binding proteins and the fourth component of the cytoskeleton. Polymerized SEPTs participate in the modulation of various cellular processes, such as cytokinesis, cell polarity, and membrane dynamics, through their interactions with microtubules, actin, and other cellular components. The main objective of this study was to dissect the molecular pathological mechanism of SEPT14 mutation-induced sperm head defects. To identify SEPT14 interactors, co-immunoprecipitation (co-IP) and nano-liquid chromatography-mass spectrometry/mass spectrometry were applied. Immunostaining showed that SEPT14 was significantly localized to the manchette structure. The SEPT14 interactors were identified and classified as (1) SEPT-, (2) microtubule-, (3) actin-, and (4) sperm structure-related proteins. One interactor, ACTN4, an actin-holding protein, was selected for further study. Co-IP experiments showed that SEPT14 interacts with ACTN4 in a male germ cell line. SEPT14 also co-localized with ACTN4 in the perinuclear and manchette regions of the sperm head in early elongating spermatids. In the cell model, mutated SEPT14 disturbed the localization pattern of ACTN4. In a clinical aspect, sperm with mutant SEPT14, SEPT14A123T (p.Ala123Thr), and SEPT14I333T (p.Ile333Thr), have mislocalized and fragmented ACTN4 signals. Sperm head defects in donors with SEPT14 mutations are caused by disruption of the functions of ACTN4 and actin during sperm head formation.
Collapse
Affiliation(s)
- Yu-Hua Lin
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan;
- Division of Urology, Department of Surgery, Cardinal Tien Hospital, New Taipei City 231, Taiwan
| | - Chia-Yen Huang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan;
- Gynecologic Cancer Center, Department of Obstetrics and Gynecology, Cathay General Hospital, Taipei 106, Taiwan
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan; (T.-H.L.); (W.-C.K.)
| | - Chih-Chun Ke
- PhD Program in Nutrition & Food Science, Fu Jen Catholic University, New Taipei City 242, Taiwan;
- Department of Urology, En Chu Kong Hospital, New Taipei City 237, Taiwan
| | - Ya-Yun Wang
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan; (Y.-Y.W.); (H.-C.L.)
| | - Tsung-Hsuan Lai
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan; (T.-H.L.); (W.-C.K.)
- Department of Obstetrics and Gynecology, Cathay General Hospital, Taipei 106, Taiwan
| | - Hsuan-Che Liu
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan; (Y.-Y.W.); (H.-C.L.)
| | - Wei-Chi Ku
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan; (T.-H.L.); (W.-C.K.)
| | - Chying-Chyuan Chan
- Department of Obstetrics and Gynecology, Taipei City Hospital, Renai Branch, Taipei 106, Taiwan;
| | - Ying-Hung Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242, Taiwan; (Y.-Y.W.); (H.-C.L.)
- Correspondence:
| |
Collapse
|
25
|
Zhang W, Liao K, Liu D. MicroRNA‑744‑5p is downregulated in colorectal cancer and targets SEPT2 to suppress the malignant phenotype. Mol Med Rep 2020; 23:54. [PMID: 33200802 PMCID: PMC7705998 DOI: 10.3892/mmr.2020.11692] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 08/28/2020] [Indexed: 12/13/2022] Open
Abstract
MicroRNA (miR)‑744‑5p serves a pivotal role in the progression of multiple cancers; however, the function of miR‑744‑5p in colorectal cancer (CRC) remains largely unknown. In the present study, the effects of miR‑744‑5p on the progression of CRC were analyzed and the mechanisms involved were investigated. It was revealed that miR‑744‑5p was frequently downregulated in CRC tissues and cell lines. Overexpression of miR‑744‑5p significantly inhibited the proliferation, colony formation, and promoted the apoptosis of CRC cells. Bioinformatics analysis revealed that Septin 2 (SEPT2) was a potential target of miR‑744‑5p. miR‑744‑5p bound the 3'‑untranslated region (UTR) of SEPT2 and reduced the level of SEPT2 in CRC cells. A negative correlation between the expression of miR‑744‑5p and SEPT2 was observed in CRC tissues. Overexpression of SEPT2 counteracted the suppressive effect of miR‑744‑5p on the proliferation and apoptosis of CRC cells. Collectively, these data demonstrated the functional mechanism of miR‑744‑5p by targeting SEPT2, which suggested miR‑744‑5p as a potential target for the treatment of patients with CRC.
Collapse
Affiliation(s)
- Wei Zhang
- Department of General Surgery, People's Hospital of Yichun City, Yichun, Jiangxi 336000, P.R. China
| | - Kai Liao
- Department of General Surgery, People's Hospital of Yichun City, Yichun, Jiangxi 336000, P.R. China
| | - Dongning Liu
- Department of General Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| |
Collapse
|
26
|
Woods BL, Gladfelter AS. The state of the septin cytoskeleton from assembly to function. Curr Opin Cell Biol 2020; 68:105-112. [PMID: 33188984 DOI: 10.1016/j.ceb.2020.10.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/01/2020] [Accepted: 10/08/2020] [Indexed: 01/09/2023]
Abstract
Septins are conserved guanine nucleotide-binding proteins that polymerize into filaments at the cell cortex or in association with other cytoskeletal proteins, such as actin or microtubules. As integral players in many morphogenic and signaling events, septins form scaffolds important for the recruitment of the cytokinetic machinery, organization of the plasma membrane, and orientation of cell polarity. Mutations in septins or their misregulation are associated with numerous diseases. Despite growing appreciation for the importance of septins in different aspects of cell biology and disease, septins remain relatively poorly understood compared with other cytoskeletal proteins. Here in this review, we highlight some of the recent developments of the last two years in the field of septin cell biology.
Collapse
Affiliation(s)
- Benjamin L Woods
- Biology Department, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Amy S Gladfelter
- Biology Department, University of North Carolina, Chapel Hill, NC, 27599, USA; Marine Biological Laboratory, Woods Hole, MA, 02543, USA.
| |
Collapse
|
27
|
Novel Functions of the Septin Cytoskeleton: Shaping Up Tissue Inflammation and Fibrosis. THE AMERICAN JOURNAL OF PATHOLOGY 2020; 191:40-51. [PMID: 33039354 DOI: 10.1016/j.ajpath.2020.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/24/2020] [Accepted: 09/16/2020] [Indexed: 12/19/2022]
Abstract
Chronic inflammatory diseases cause profound alterations in tissue homeostasis, including unchecked activation of immune and nonimmune cells leading to disease complications such as aberrant tissue repair and fibrosis. Current anti-inflammatory therapies are often insufficient in preventing or reversing these complications. Remodeling of the intracellular cytoskeleton is critical for cell activation in inflamed and fibrotic tissues; however, the cytoskeleton has not been adequately explored as a therapeutic target in inflammation. Septins are GTP-binding proteins that self-assemble into higher order cytoskeletal structures. The septin cytoskeleton exhibits a number of critical cellular functions, including regulation of cell shape and polarity, cytokinesis, cell migration, vesicle trafficking, and receptor signaling. Surprisingly, little is known about the role of the septin cytoskeleton in inflammation. This article reviews emerging evidence implicating different septins in the regulation of host-pathogen interactions, immune cell functions, and tissue fibrosis. Targeting of the septin cytoskeleton as a potential future therapeutic intervention in human inflammatory and fibrotic diseases is also discussed.
Collapse
|
28
|
Cai B, Wang X, Bu Q, Li P, Xue Q, Zhang J, Ding P, Sun D. LncRNA AFAP1-AS1 Knockdown Represses Cell Proliferation, Migration, and Induced Apoptosis in Breast Cancer by Downregulating SEPT2 Via Sponging miR-497-5p. Cancer Biother Radiopharm 2020; 37:662-672. [PMID: 32955920 DOI: 10.1089/cbr.2020.3688] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Bo Cai
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Xichao Wang
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Qing'ao Bu
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Peng Li
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Qingze Xue
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Jun Zhang
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Pengpeng Ding
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| | - Diwen Sun
- Department of Thyroid Surgery & Ward Area of Breast Surgery, Shengli Oilfield Central Hospital, Dongying, China
| |
Collapse
|
29
|
Discovery of broad-spectrum fungicides that block septin-dependent infection processes of pathogenic fungi. Nat Microbiol 2020; 5:1565-1575. [PMID: 32958858 DOI: 10.1038/s41564-020-00790-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 08/24/2020] [Indexed: 11/09/2022]
Abstract
Many pathogenic fungi depend on the development of specialized infection structures called appressoria to invade their hosts and cause disease. Impairing the function of fungal infection structures therefore provides a potential means by which diseases could be prevented. In spite of this extraordinary potential, however, relatively few anti-penetrant drugs have been developed to control fungal diseases, of either plants or animals. In the present study, we report the identification of compounds that act specifically to prevent fungal infection. We found that the organization of septin GTPases, which are essential for appressorium-mediated infection in the rice blast fungus Magnaporthe oryzae, requires very-long-chain fatty acids (VLCFAs), which act as mediators of septin organization at membrane interfaces. VLCFAs promote septin recruitment to curved plasma membranes and depletion of VLCFAs prevents septin assembly and host penetration by M. oryzae. We observed that VLCFA biosynthesis inhibitors not only prevent rice blast disease, but also show effective, broad-spectrum fungicidal activity against a wide range of fungal pathogens of maize, wheat and locusts, without affecting their respective hosts. Our findings reveal a mechanism underlying septin-mediated infection structure formation in fungi and provide a class of fungicides to control diverse diseases of plants and animals.
Collapse
|
30
|
Farrugia AJ, Rodríguez J, Orgaz JL, Lucas M, Sanz-Moreno V, Calvo F. CDC42EP5/BORG3 modulates SEPT9 to promote actomyosin function, migration, and invasion. J Cell Biol 2020; 219:e201912159. [PMID: 32798219 PMCID: PMC7480113 DOI: 10.1083/jcb.201912159] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 04/30/2020] [Accepted: 05/27/2020] [Indexed: 01/22/2023] Open
Abstract
Fast amoeboid migration is critical for developmental processes and can be hijacked by cancer cells to enhance metastatic dissemination. This migratory behavior is tightly controlled by high levels of actomyosin contractility, but how it is coupled to other cytoskeletal components is poorly understood. Septins are increasingly recognized as novel cytoskeletal components, but details on their regulation and contribution to migration are lacking. Here, we show that the septin regulator Cdc42EP5 is consistently required for amoeboid melanoma cells to invade and migrate into collagen-rich matrices and locally invade and disseminate in vivo. Cdc42EP5 associates with actin structures, leading to increased actomyosin contractility and amoeboid migration. Cdc42EP5 affects these functions through SEPT9-dependent F-actin cross-linking, which enables the generation of F-actin bundles required for the sustained stabilization of highly contractile actomyosin structures. This study provides evidence that Cdc42EP5 is a regulator of cancer cell motility that coordinates actin and septin networks and describes a unique role for SEPT9 in melanoma invasion and metastasis.
Collapse
Affiliation(s)
- Aaron J. Farrugia
- Division of Cancer Biology, The Institute of Cancer Research, London, UK
| | - Javier Rodríguez
- Instituto de Biomedicina y Biotecnología de Cantabria (Consejo Superior de Investigaciones Científicas, Universidad de Cantabria), Santander, Spain
| | - Jose L. Orgaz
- Centre for Cancer and Inflammation, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - María Lucas
- Instituto de Biomedicina y Biotecnología de Cantabria (Consejo Superior de Investigaciones Científicas, Universidad de Cantabria), Santander, Spain
| | - Victoria Sanz-Moreno
- Centre for Cancer and Inflammation, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Fernando Calvo
- Division of Cancer Biology, The Institute of Cancer Research, London, UK
- Instituto de Biomedicina y Biotecnología de Cantabria (Consejo Superior de Investigaciones Científicas, Universidad de Cantabria), Santander, Spain
| |
Collapse
|
31
|
Systematic identification of genetic systems associated with phenotypes in patients with rare genomic copy number variations. Hum Genet 2020; 140:457-475. [PMID: 32778951 DOI: 10.1007/s00439-020-02214-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 07/30/2020] [Indexed: 01/02/2023]
Abstract
Copy number variation (CNV) related disorders tend to show complex phenotypic profiles that do not match known diseases. This makes it difficult to ascertain their underlying molecular basis. A potential solution is to compare the affected genomic regions for multiple patients that share a pathological phenotype, looking for commonalities. Here, we present a novel approach to associate phenotypes with functional systems, in terms of GO categories and KEGG and Reactome pathways, based on patient data. The approach uses genomic and phenomic data from the same patients, finding shared genomic regions between patients with similar phenotypes. These regions are mapped to genes to find associated functional systems. We applied the approach to analyse patients in the DECIPHER database with de novo CNVs, finding functional systems associated with most phenotypes, often due to mutations affecting related genes in the same genomic region. Manual inspection of the ten top-scoring phenotypes found multiple FunSys connections supported by the previous studies for seven of them. The workflow also produces reports focussed on the genes and FunSys connected to the different phenotypes, alongside patient-specific reports, which give details of the associated genes and FunSys for each individual in the cohort. These can be run in "confidential" mode, preserving patient confidentiality. The workflow presented here can be used to associate phenotypes with functional systems using data at the level of a whole cohort of patients, identifying important connections that could not be found when considering them individually. The full workflow is available for download, enabling it to be run on any patient cohort for which phenotypic and CNV data are available.
Collapse
|
32
|
Whole-Organ Genomic Characterization of Mucosal Field Effects Initiating Bladder Carcinogenesis. Cell Rep 2020; 26:2241-2256.e4. [PMID: 30784602 DOI: 10.1016/j.celrep.2019.01.095] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 12/12/2018] [Accepted: 01/25/2019] [Indexed: 12/13/2022] Open
Abstract
We used whole-organ mapping to study the locoregional molecular changes in a human bladder containing multifocal cancer. Widespread DNA methylation changes were identified in the entire mucosa, representing the initial field effect. The field effect was associated with subclonal low-allele frequency mutations and a small number of DNA copy alterations. A founder mutation in the RNA splicing gene, ACIN1, was identified in normal mucosa and expanded clonally with an additional 21 mutations in progression to carcinoma. The patterns of mutations and copy number changes in carcinoma in situ and foci of carcinoma were almost identical, confirming their clonal origins. The pathways affected by the DNA copy alterations and mutations, including the Kras pathway, were preceded by the field changes in DNA methylation, suggesting that they reinforced mechanisms that had already been initiated by methylation. The results demonstrate that DNA methylation can serve as the initiator of bladder carcinogenesis.
Collapse
|
33
|
Zhao X, Feng H, Wang Y, Wu Y, Guo Q, Feng Y, Ma M, Guo W, Song X, Zhang Y, Han S, Cao L. Septin4 promotes cell death in human colon cancer cells by interacting with BAX. Int J Biol Sci 2020; 16:1917-1928. [PMID: 32398959 PMCID: PMC7211164 DOI: 10.7150/ijbs.44429] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 04/01/2020] [Indexed: 01/10/2023] Open
Abstract
Septin4 is a tumor suppressor protein that promotes cell programmed death in various cell types through specifically antagonizing XIAP (X linked inhibitor of apoptosis), little is known its other novel binding partner and role in colorectal cancer. In this study, we found that Septin4 significantly expressed lower in human colon cancer when compared to peri-tumor benign cells, and its low expression was significantly associated with worse prognostic outcomes. Furthermore, Septin4 participated in DOX-induced colon cancer cell death in vitro. Septin4-overexpressing colon cancer cells displayed augmented apoptotic cell death and ROS production. Additionally, Septin4-knockdown cells revealed a resistance of DOX-induced cell death and reduced ROS production. Importantly, we first identified that BAX is a novel Septin4 binding partner and the interaction is enhanced under DOX treatment. Finally, Septin4-knockdown promoted colon cells growth in vivo. These observations suggest that Septin4 as an essential molecule contribute to the occurrence and development of human colon cancer and provide new technical approaches for targeted treatment of this disease.
Collapse
Affiliation(s)
- Xin Zhao
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| | - Hao Feng
- Department of Ophthalmology, The First Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Yang Wang
- Panjin Liaohe Oilfield Gem Flower Hospital, Panjin, Liaoning Province, China
| | - Yanmei Wu
- Panjin Liaohe Oilfield Gem Flower Hospital, Panjin, Liaoning Province, China
| | - Qiqiang Guo
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| | - Yanling Feng
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| | - Mengtao Ma
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| | - Wendong Guo
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| | - Xiaoyu Song
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| | - Ying Zhang
- Department of Cardiology, the First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Shuai Han
- Department of Neurosurgery, the First Hospital of China Medical University, Shenyang Liaoning Province, China
| | - Liu Cao
- Key Laboratory of Medical Cell Biology, Ministry of Education; Institute of Translational Medicine, Collegeof Medical Science, China Medical University; Liaoning Province, Collaborative Innovation Center of Aging Related Disease Diagnosis and Treatment and Prevention, Shenyang, Liaoning Province, China
| |
Collapse
|
34
|
Development of Potent Forchlorfenuron Analogs and Their Cytotoxic Effect in Cancer Cell Lines. Sci Rep 2020; 10:3241. [PMID: 32094384 PMCID: PMC7039965 DOI: 10.1038/s41598-020-59824-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 01/29/2020] [Indexed: 02/07/2023] Open
Abstract
Forchlorfenuron (FCF) is a synthetic plant cytokinin widely used in agriculture to promote fruit size, that paradoxically inhibits proliferation, migration, and invasion in human cancer cell lines. FCF has also been shown to affect HIF-1α and HER2, which are both known to play a crucial role in cancer cell survival. In this study, we have developed potent FCF analogs through structural modification of FCF, coined UR214-1, UR214-7, and UR214-9. Compared to parental FCF, these analogs are more effective in decreasing viability and proliferation in both ovarian and endometrial cancer cell lines. These FCF analogs also suppress HER2 expression at a concentration lower than that of FCF. In addition, we found that treatment with either FCF or its analogs decreases the expression of human epididymis protein 4 (HE4), which is commonly upregulated in ovarian and endometrial cancers. Given the association between cancer behavior and HE4 production in gynecologic cancers, our findings may provide insight useful in the development of new treatment strategies for gynecologic cancers.
Collapse
|
35
|
Sun L, Cao X, Lechuga S, Feygin A, Naydenov NG, Ivanov AI. A Septin Cytoskeleton-Targeting Small Molecule, Forchlorfenuron, Inhibits Epithelial Migration via Septin-Independent Perturbation of Cellular Signaling. Cells 2019; 9:cells9010084. [PMID: 31905721 PMCID: PMC7016606 DOI: 10.3390/cells9010084] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 12/24/2019] [Accepted: 12/26/2019] [Indexed: 12/19/2022] Open
Abstract
Septins are GTP-binding proteins that self-assemble into high-order cytoskeletal structures, filaments, and rings. The septin cytoskeleton has a number of cellular functions, including regulation of cytokinesis, cell migration, vesicle trafficking, and receptor signaling. A plant cytokinin, forchlorfenuron (FCF), interacts with septin subunits, resulting in the altered organization of the septin cytoskeleton. Although FCF has been extensively used to examine the roles of septins in various cellular processes, its specificity, and possible off-target effects in vertebrate systems, has not been investigated. In the present study, we demonstrate that FCF inhibits spontaneous, as well as hepatocyte growth factor-induced, migration of HT-29 and DU145 human epithelial cells. Additionally, FCF increases paracellular permeability of HT-29 cell monolayers. These inhibitory effects of FCF persist in epithelial cells where the septin cytoskeleton has been disassembled by either CRISPR/Cas9-mediated knockout or siRNA-mediated knockdown of septin 7, insinuating off-target effects of FCF. Biochemical analysis reveals that FCF-dependent inhibition of the motility of control and septin-depleted cells is accompanied by decreased expression of the c-Jun transcription factor and inhibited ERK activity. The described off-target effects of FCF strongly suggests that caution is warranted while using this compound to examine the biological functions of septins in cellular systems and model organisms.
Collapse
Affiliation(s)
- Lei Sun
- Department of Inflammation and Immunity, Lerner Research Institute of Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (L.S.); (X.C.); (S.L.); (N.G.N.)
| | - Xuelei Cao
- Department of Inflammation and Immunity, Lerner Research Institute of Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (L.S.); (X.C.); (S.L.); (N.G.N.)
| | - Susana Lechuga
- Department of Inflammation and Immunity, Lerner Research Institute of Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (L.S.); (X.C.); (S.L.); (N.G.N.)
| | - Alex Feygin
- School of Nursing, Virginia Commonwealth University School of Nursing, Richmond, VA 23298, USA;
| | - Nayden G. Naydenov
- Department of Inflammation and Immunity, Lerner Research Institute of Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (L.S.); (X.C.); (S.L.); (N.G.N.)
| | - Andrei I. Ivanov
- Department of Inflammation and Immunity, Lerner Research Institute of Cleveland Clinic Foundation, Cleveland, OH 44195, USA; (L.S.); (X.C.); (S.L.); (N.G.N.)
- Correspondence: ; Tel.: +1-216-444-5620
| |
Collapse
|
36
|
Chen D, Hastie E, Sherwood D. Endogenous expression of UNC-59/Septin in C. elegans. MICROPUBLICATION BIOLOGY 2019; 2019. [PMID: 32550451 PMCID: PMC7252340 DOI: 10.17912/micropub.biology.000200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - David Sherwood
- Duke University, Department of Biology, Regeneration Next
| |
Collapse
|
37
|
He H, Li J, Xu M, Kan Z, Gao Y, Yuan C. Expression of septin 2 and association with clinicopathological parameters in colorectal cancer. Oncol Lett 2019; 18:2376-2383. [PMID: 31402940 PMCID: PMC6676678 DOI: 10.3892/ol.2019.10528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 06/07/2019] [Indexed: 12/16/2022] Open
Abstract
Septin 2 (SEPT2) is a tumor-related gene belonging to the SEPT family that affects the cellular processes of hepatoma carcinoma cells, glioblastoma cells and mesangial cells and is highly expressed in breast cancer, biliary tract cancer and acute myeloid leukemia. Colorectal cancer (CRC) is the third most common type of malignancy in humans. In the present study, Oncomine database was used to compare the expression pattern of SEPT2 mRNA between CRC and normal tissues. Additionally, protein expression in 90 pairs of CRC and paracancerous tissues was analyzed by western blotting and immunohistochemistry (IHC). The results showed that SEPT2 was highly expressed in CRC tissues at the mRNA and protein levels. SEPT2 expression quantified by IHC was associated with lymph node metastasis, the degree of differentiation and TNM staging. Increased SEPT2 wass associated with reduced overall survival (OS) according to Kaplan-Meier analysis. COX proportional hazard analysis indicated that SEPT2 was an independent factor that influenced the OS of patients with CRC. Therefore, SEPT2 was associated with the occurrence, progression and prognosis of CRC and thus, may be a marker and prognostic indicator of CRC.
Collapse
Affiliation(s)
- Haoyu He
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Junjun Li
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Meng Xu
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Ziliang Kan
- Graduate School, Singapore Management University, Singapore 178903, Republic of Singapore
| | - Yang Gao
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Caijun Yuan
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| |
Collapse
|
38
|
Septin 9 isoforms promote tumorigenesis in mammary epithelial cells by increasing migration and ECM degradation through metalloproteinase secretion at focal adhesions. Oncogene 2019; 38:5839-5859. [PMID: 31285548 PMCID: PMC6859949 DOI: 10.1038/s41388-019-0844-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 02/07/2023]
Abstract
The cytoskeletal interacting protein Septin 9 (SEPT9), a member of the septin gene family, has been proposed to have oncogenic functions. It is a known hot spot of retroviral tagging insertion and a fusion partner of both de novo and therapy-induced mixed lineage leukemia (MLL). Of all septins, SEPT9 holds the strongest link to cancer, especially breast cancer. Murine models of breast cancer frequently exhibit Sept9 amplification in the form of double minute chromosomes, and about 20% of human breast cancer display genomic amplification and protein over expression at the SEPT9 locus. Yet, a clear mechanism by which SEPT9 elicits tumor-promoting functions is lacking. To obtain unbiased insights on molecular signatures of SEPT9 upregulation in breast tumors, we overexpressed several of its isoforms in breast cancer cell lines. Global transcriptomic profiling supports a role of SEPT9 in invasion. Functional studies reveal that SEPT9 upregulation is sufficient to increase degradation of the extracellular matrix, while SEPT9 downregulation inhibits this process. The degradation pattern is peripheral and associated with focal adhesions (FA), where it is coupled with increased expression of matrix metalloproteinases. SEPT9 overexpression induces MMP upregulation in human tumors and in culture models and promotes MMP3 secretion to the media at FAs. Downregulation of SEPT9 or chemical inhibition of septin filament assembly impairs recruitment of MMP3 to FAs. Our results indicate that SEPT9 promotes upregulation and both trafficking and secretion of MMPs near FAs, thus enhancing migration and invasion of breast cancer cells.
Collapse
|
39
|
A blueprint of septin expression in human tissues. Funct Integr Genomics 2019; 19:787-797. [PMID: 31089837 DOI: 10.1007/s10142-019-00690-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/03/2019] [Accepted: 05/06/2019] [Indexed: 12/29/2022]
Abstract
Septins are GTP-binding proteins that polymerize to form filaments involved in several important biological processes. In human, 13 distinct septins genes are classified in four groups. Filaments formed by septins are complex and usually involve members of each group in specific positions. Expression data from GTEx database, a publicly available expression database with thousands of samples derived from multiple human tissues, was used to evaluate the expression of septins. The brain is noticeably a hotspot for septin expression where few genes contribute to a large portion of septin transcript pool. Co-expression data between septins suggests two predominant specific complexes in brain tissues and one filament in other tissues. SEPT3 and SEPT5 are two genes highly expressed in the brain and with a strong co-expression in all brain tissues. Additional analysis shows that the expression of these two genes is highly variable between individuals, but significantly dependent on the individual's age. Age-dependent decrease of expression from those two septins involved in synapses reinforces their possible link with cognitive decay and neurodegenerative diseases associated with aging. Analysis of enrichment of Gene Ontology terms from lists of genes consistently co-expressed with septins suggests participation in diverse biological processes, pointing out some novel roles for septins. Interestingly, we observed strong consistency of some of these terms with experimentally described roles of septins. Coordination of septins expression with genes involved in DNA repair and cell cycle control may provide insights for previously described links between septins and cancer.
Collapse
|
40
|
James NE, Cantillo E, Yano N, Chichester CO, DiSilvestro PA, Hovanesian V, Rao RSP, Kim KK, Moore RG, Ahsan N, Ribeiro JR. Septin-2 is overexpressed in epithelial ovarian cancer and mediates proliferation via regulation of cellular metabolic proteins. Oncotarget 2019; 10:2959-2972. [PMID: 31105878 PMCID: PMC6508204 DOI: 10.18632/oncotarget.26836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/23/2019] [Indexed: 02/06/2023] Open
Abstract
Epithelial Ovarian Cancer (EOC) is associated with dismal survival rates due to the fact that patients are frequently diagnosed at an advanced stage and eventually become resistant to traditional chemotherapeutics. Hence, there is a crucial need for new and innovative therapies. Septin-2, a member of the septin family of GTP binding proteins, has been characterized in EOC for the first time and represents a potential future target. Septin-2 was found to be overexpressed in serous and clear cell human patient tissue compared to benign disease. Stable septin-2 knockdown clones developed in an ovarian cancer cell line exhibited a significant decrease in proliferation rates. Comparative label-free proteomic analysis of septin-2 knockdown cells revealed differential protein expression of pathways associated with the TCA cycle, acetyl CoA, proteasome and spliceosome. Further validation of target proteins indicated that septin-2 plays a predominant role in post-transcriptional and translational modifications as well as cellular metabolism, and suggested the potential novel role of septin-2 in promoting EOC tumorigenesis through these mechanisms.
Collapse
Affiliation(s)
- Nicole E. James
- Division of Gynecologic Oncology, Program in Women’s Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital, Providence, RI, USA
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI, USA
| | - Evelyn Cantillo
- Division of Gynecologic Oncology, Program in Women’s Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital, Providence, RI, USA
| | - Naohiro Yano
- Department of Surgery, Roger Williams Medical Center, Boston University Medical School, Providence, RI, USA
| | - Clinton O. Chichester
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI, USA
| | - Paul A. DiSilvestro
- Division of Gynecologic Oncology, Program in Women’s Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital, Providence, RI, USA
- Division of Biology and Medicine, Warren Alpert Medical School, Brown University, Providence, RI, USA
| | | | - R. Shyama Prasad Rao
- Biostatistics and Bioinformatics Division, Yenepoya Research Center, Yenepoya University, Mangalore, India
| | - Kyukwang K. Kim
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, USA
| | - Richard G. Moore
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, USA
| | - Nagib Ahsan
- Center for Cancer Research Development, Proteomics Core Facility, Rhode Island Hospital, Providence, RI, USA
- Division of Biology and Medicine, Warren Alpert Medical School, Brown University, Providence, RI, USA
| | - Jennifer R. Ribeiro
- Division of Gynecologic Oncology, Program in Women’s Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital, Providence, RI, USA
- Division of Biology and Medicine, Warren Alpert Medical School, Brown University, Providence, RI, USA
| |
Collapse
|
41
|
Banko M, Mucha-Kruczynska I, Weise C, Heyd F, Ewers H. A homozygous genome-edited Sept2-EGFP fibroblast cell line. Cytoskeleton (Hoboken) 2019; 76:73-82. [PMID: 30924304 PMCID: PMC6593442 DOI: 10.1002/cm.21518] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 01/09/2023]
Abstract
Septins are a conserved, essential family of GTPases that interact with actin, microtubules, and membranes and form scaffolds and diffusion barriers in cells. Several of the 13 known mammalian septins assemble into nonpolar, multimeric complexes that can further polymerize into filamentous structures. While some GFP‐coupled septins have been described, overexpression of GFP‐tagged septins often leads to artifacts in localization and function. To overcome this ubiquitous problem, we have here generated a genome‐edited rat fibroblast cell line expressing Septin 2 (Sept2) coupled to enhanced green fluorescent protein (EGFP) from both chromosomal loci. We characterize these cells by genomic polymerase chain reaction (PCR) for genomic integration, by western blot and reverse transcriptase‐PCR for expression, by immunofluorescence and immunoprecipitation for the colocalization of septins with one another and cellular structures and for complex formation of different septins. By live cell imaging, proliferation and migration assays we investigate proper function of septins in these cells. We find that EGFP is incorporated into both chromosomal loci and only EGFP‐coupled Sept2 is expressed in homozygous cells. We find that endogenous Sept2‐EGFP exhibits expression levels, localization and incorporation into cellular septin complexes similar to the wt in these cells. The expression level of other septins is not perturbed and cell division and cell migration proceed normally. We expect our cell line to be a useful tool for the cell biology of septins, especially for quantitative biology.
Collapse
Affiliation(s)
- Monika Banko
- Randall Division of Cell and Molecular Biophysics, King's College London, London, UK.,Department of Biology, ETH Zürich, Zürich, Switzerland
| | - Iwona Mucha-Kruczynska
- Randall Division of Cell and Molecular Biophysics, King's College London, London, UK.,Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany
| | - Christoph Weise
- Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany
| | - Florian Heyd
- Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany
| | - Helge Ewers
- Randall Division of Cell and Molecular Biophysics, King's College London, London, UK.,Department of Biology, ETH Zürich, Zürich, Switzerland.,Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany
| |
Collapse
|
42
|
Ge SQ, Wu YL, Zhu JL, Tian Y, Wang SS, Gao ZQ. Preliminary investigation of the effects of an FCF inhibitor interference with Septin in the early stage embryos in mice. Mol Med Rep 2019; 19:4401-4406. [PMID: 30896847 DOI: 10.3892/mmr.2019.10072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 09/06/2018] [Indexed: 11/05/2022] Open
Abstract
The objective of the present study was to investigate the effects of for chlorfenuron (FCF) interference with the septin protein on early stage embryos in mice. The 1‑cell embryos were collected and divided into an FCF interference group and a control group. The FCF interference group was cultured in FCF media and the control group was cultured in dimethyl sulphoxide media at 37˚C with 5% CO2 until the desired phase was achieved. Septin2 protein expression was detected using immunofluorescence and western blot analysis. Blastocyst α‑tubulin was stained by immunofluorescence to observe the alterations in spindles and microtubules. The rate of early embryo development into blastocysts was significantly reduced following FCF treatment (P<0.05). In the control group, septin2 was observed with a confocal microscope; septin2 was expressed in embryos at all stages and mainly in the blastomeres from the 2‑cell stage onwards, with the expression concentrated in the nuclei of the blastomeres as identified by strong fluorescence. In the FCF interference group, septin2 was weakly expressed in the nuclei of blastomeres at the 2‑ and 4‑cell stages, and in the granulated blastomeres at the 4‑ and 8‑cell stages. Expression was barely observed in and following the morula. Granulation was observed starting from the 4‑ and 8‑cell stages. Compared with the control group, the FCF interference group exhibited irregular microtubules, abnormal spindle morphology and disordered chromosome arrangement in the blastocysts. The septin2 protein was expressed throughout the early stage embryo from the 2‑cell stage to the blastocyst and localized in the nuclei of blastomeres. When the septin protein experienced interference by the FCF inhibitor, septin2 protein expression was reduced, which simultaneously resulted in abnormal embryonic development, uneven cytoplasmic division, various sizes and a reduced number of blastomeres, granulation in the blastomeres, disordered blastocyst microtubule distribution, spindle shape alterations and an abnormality of chromosome arrangement.
Collapse
Affiliation(s)
- Shao-Qin Ge
- The Institute of Traditional Chinese Medicine of Hebei University Health Science Centre, Baoding, Hebei 071002, P.R. China
| | - Yin-Ling Wu
- The Medical Comprehensive Laboratory Center of Hebei University Health Science Centre, Baoding, Hebei 071002, P.R. China
| | - Jin-Liang Zhu
- The Centre for Reproductive Medicine of Peking University Third Hospital, Beijing 100191, P.R. China
| | - Yuan Tian
- The Medical Comprehensive Laboratory Center of Hebei University Health Science Centre, Baoding, Hebei 071002, P.R. China
| | - Shu-Song Wang
- Key Laboratory of Family Planning and Healthy Birth, National Health and Family Planning Commission Hebei Research Institute for Family Planning, Shijiazhuang, Hebei 050071, P.R. China
| | - Zhang-Quan Gao
- Key Laboratory of Family Planning and Healthy Birth, National Health and Family Planning Commission Hebei Research Institute for Family Planning, Shijiazhuang, Hebei 050071, P.R. China
| |
Collapse
|
43
|
Zhao GX, Xu YY, Weng SQ, Zhang S, Chen Y, Shen XZ, Dong L, Chen S. CAPS1 promotes colorectal cancer metastasis via Snail mediated epithelial mesenchymal transformation. Oncogene 2019; 38:4574-4589. [PMID: 30742066 DOI: 10.1038/s41388-019-0740-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 12/26/2018] [Accepted: 01/15/2019] [Indexed: 01/02/2023]
Abstract
Colorectal cancer (CRC) is a common gastrointestinal cancer with high mortality rate mostly due to metastasis. Ca2+-dependent activator protein for secretion 1 (CAPS1) was originally identified as a soluble factor that reconstitutes Ca2+-dependent secretion. In this study, we discovered a novel role of CAPS1 in CRC metastasis. CAPS1 is frequently up-regulated in CRC tissues. Increased CAPS1 expression is associated with frequent metastasis and poor prognosis of CRC patients. Overexpression of CAPS1 promotes CRC cell migration and invasion in vitro, as well as liver metastasis in vivo, without affecting cell proliferation. CAPS1 induces epithelial-mesenchymal transition (EMT), including decreased E-cadherin and ZO-1, epithelial marker expression, and increased N-cadherin and Snail, mesenchymal marker expression. Snail knockdown reversed CAPS1-induced EMT, cell migration and invasion. This result indicates that Snail is required for CAPS1-mediated EMT process and metastasis in CRC. Furthermore, CAPS1 can bind with Septin2 and p85 (subunit of PI3K). LY294002 and wortmanin, PI3K/Akt inhibitors, can abolish CAPS1-induced increase of Akt/GSK3β activity, as well as increase of Snail protein level. Taken together, CAPS1 promotes colorectal cancer metastasis through PI3K/Akt/GSK3β/Snail signal pathway-mediated EMT process.
Collapse
Affiliation(s)
- Guang-Xi Zhao
- Department of Gastroenterology and Hepatology, Shanghai Institute of Liver Diseases, Zhongshan Hospital of Fudan University, Shanghai, 200032, China.,Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Ying-Ying Xu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Shu-Qiang Weng
- Department of Gastroenterology and Hepatology, Shanghai Institute of Liver Diseases, Zhongshan Hospital of Fudan University, Shanghai, 200032, China
| | - Si Zhang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Ying Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Xi-Zhong Shen
- Department of Gastroenterology and Hepatology, Shanghai Institute of Liver Diseases, Zhongshan Hospital of Fudan University, Shanghai, 200032, China.
| | - Ling Dong
- Department of Gastroenterology and Hepatology, Shanghai Institute of Liver Diseases, Zhongshan Hospital of Fudan University, Shanghai, 200032, China.
| | - She Chen
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China.
| |
Collapse
|
44
|
Kappel S, Borgström A, Stokłosa P, Dörr K, Peinelt C. Store-operated calcium entry in disease: Beyond STIM/Orai expression levels. Semin Cell Dev Biol 2019; 94:66-73. [PMID: 30630032 DOI: 10.1016/j.semcdb.2019.01.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/29/2018] [Accepted: 01/05/2019] [Indexed: 12/19/2022]
Abstract
Precise intracellular calcium signaling is crucial to numerous cellular functions. In non-excitable cells, store-operated calcium entry (SOCE) is a key step in the generation of intracellular calcium signals. Tight regulation of SOCE is important, and dysregulation is involved in several pathophysiological cellular malfunctions. The current underlying SOCE, calcium release-activated calcium current (ICRAC), was first discovered almost three decades ago. Since its discovery, the molecular components of ICRAC, Orai1 and stromal interaction molecule 1 (STIM1), have been extensively investigated. Several regulatory mechanisms and proteins contribute to alterations in SOCE and cellular malfunctions in cancer, immune and neurodegenerative diseases, inflammation, and neuronal disorders. This review summarizes these regulatory mechanisms, including glycosylation, pH sensing, and the regulatory proteins golli, α-SNAP, SARAF, ORMDL3, CRACR2A, and TRPM4 channels.
Collapse
Affiliation(s)
- Sven Kappel
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3012 Bern, Switzerland
| | - Anna Borgström
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3012 Bern, Switzerland
| | - Paulina Stokłosa
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3012 Bern, Switzerland
| | | | - Christine Peinelt
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3012 Bern, Switzerland.
| |
Collapse
|
45
|
Auxier B, Dee J, Berbee ML, Momany M. Diversity of opisthokont septin proteins reveals structural constraints and conserved motifs. BMC Evol Biol 2019; 19:4. [PMID: 30616529 PMCID: PMC6323724 DOI: 10.1186/s12862-018-1297-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Accepted: 11/19/2018] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Septins are cytoskeletal proteins important in cell division and in establishing and maintaining cell polarity. Although septins are found in various eukaryotes, septin genes had the richest history of duplication and diversification in the animals, fungi and protists that comprise opisthokonts. Opisthokont septin paralogs encode modular proteins that assemble into heteropolymeric higher order structures. The heteropolymers can create physical barriers to diffusion or serve as scaffolds organizing other morphogenetic proteins. How the paralogous septin modules interact to form heteropolymers is still unclear. Through comparative analyses, we hoped to clarify the evolutionary origin of septin diversity and to suggest which amino acid residues were responsible for subunit binding specificity. RESULTS Here we take advantage of newly sequenced genomes to reconcile septin gene trees with a species phylogeny from 22 animals, fungi and protists. Our phylogenetic analysis divided 120 septins representing the 22 taxa into seven clades (Groups) of paralogs. Suggesting that septin genes duplicated early in opisthokont evolution, animal and fungal lineages share septin Groups 1A, 4 and possibly also 1B and 2. Group 5 septins were present in fungi but not in animals and whether they were present in the opisthokont ancestor was unclear. Protein homology folding showed that previously identified conserved septin motifs were all located near interface regions between the adjacent septin monomers. We found specific interface residues associated with each septin Group that are candidates for providing subunit binding specificity. CONCLUSIONS This work reveals that duplication of septin genes began in an ancestral opisthokont more than a billion years ago and continued through the diversification of animals and fungi. Evidence for evolutionary conservation of ~ 49 interface residues will inform mutagenesis experiments and lead to improved understanding of the rules guiding septin heteropolymer formation and from there, to improved understanding of development of form in animals and fungi.
Collapse
Affiliation(s)
- Benjamin Auxier
- Department of Botany, University of British Columbia, Vancouver, Canada
- current address: Laboratory of Genetics, Wageningen University and Research, P.O. Box 16, 6700AA, Wageningen, The Netherlands
| | - Jaclyn Dee
- Department of Botany, University of British Columbia, Vancouver, Canada
| | - Mary L. Berbee
- Department of Botany, University of British Columbia, Vancouver, Canada
| | - Michelle Momany
- Fungal Biology Group and Plant Biology Department, University of Georgia, Athens, USA
| |
Collapse
|
46
|
Tan Z, Yi X, Carruthers NJ, Stemmer PM, Lubman DM. Single Amino Acid Variant Discovery in Small Numbers of Cells. J Proteome Res 2018; 18:417-425. [PMID: 30404448 DOI: 10.1021/acs.jproteome.8b00694] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We have performed deep proteomic profiling down to as few as 9 Panc-1 cells using sample fractionation, TMT multiplexing, and a carrier/reference strategy. Off line fractionation of the TMT-labeled sample pooled with TMT-labeled carrier Panc-1 whole cell proteome was achieved using alkaline reversed phase spin columns. The fractionation in conjunction with the carrier/reference (C/R) proteome allowed us to detect 47 414 unique peptides derived from 6261 proteins, which provided a sufficient coverage to search for single amino acid variants (SAAVs) related to cancer. This high sample coverage is essential in order to detect a significant number of SAAVs. In order to verify genuine SAAVs versus false SAAVs, we used the SAVControl pipeline and found a total of 79 SAAVs from the 9-cell Panc-1 sample and 174 SAAVs from the 5000-cell Panc-1 C/R proteome. The SAAVs as sorted into high confidence and low confidence SAAVs were checked manually. All the high confidence SAAVs were found to be genuine SAAVs, while half of the low confidence SAAVs were found to be false SAAVs mainly related to PTMs. We identified several cancer-related SAAVs including KRAS, which is an important oncoprotein in pancreatic cancer. In addition, we were able to detect sites involved in loss or gain of glycosylation due to the enhanced coverage available in these experiments where we can detect both sites of loss and gain of glycosylation.
Collapse
Affiliation(s)
- Zhijing Tan
- Department of Surgery , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Xinpei Yi
- NCMIS, RCSDS, Academy of Mathematics and Systems Science , Chinese Academy of Sciences , Beijing 100190 , China.,School of Mathematical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Nicholas J Carruthers
- Institute of Environmental Health Sciences , Wayne State University , Detroit , Michigan 48202 , United States
| | - Paul M Stemmer
- Institute of Environmental Health Sciences , Wayne State University , Detroit , Michigan 48202 , United States
| | - David M Lubman
- Department of Surgery , University of Michigan , Ann Arbor , Michigan 48109 , United States
| |
Collapse
|
47
|
Lam M, Calvo F. Regulation of mechanotransduction: Emerging roles for septins. Cytoskeleton (Hoboken) 2018; 76:115-122. [PMID: 30091182 PMCID: PMC6519387 DOI: 10.1002/cm.21485] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/10/2018] [Accepted: 08/02/2018] [Indexed: 12/31/2022]
Abstract
Cells exist in dynamic three‐dimensional environments where they experience variable mechanical forces due to their interaction with the extracellular matrix, neighbouring cells and physical stresses. The ability to constantly and rapidly alter cellular behaviour in response to the mechanical environment is therefore crucial for cell viability, tissue development and homeostasis. Mechanotransduction is the process whereby cells translate mechanical inputs into biochemical signals. These signals in turn adjust cell morphology and cellular functions as diverse as proliferation, differentiation, migration and apoptosis. Here, we provide an overview of the current understanding of mechanotransduction and how septins may participate in it, drawing on their architecture and localization, their ability to directly bind and modify actomyosin networks and membranes, and their associations with the nuclear envelope.
Collapse
Affiliation(s)
- Maxine Lam
- Tumour Microenvironment Team, Division of Cancer Biology, Institute of Cancer Research, London, United Kingdom
| | - Fernando Calvo
- Tumour Microenvironment Team, Division of Cancer Biology, Institute of Cancer Research, London, United Kingdom.,Tumour Microenvironment Team, Department of Molecular and Cellular Signalling, Instituto de Biomedicina y Biotecnología de Cantabria, Santander, Spain
| |
Collapse
|
48
|
Abbey M, Gaestel M, Menon MB. Septins: Active GTPases or just GTP-binding proteins? Cytoskeleton (Hoboken) 2018; 76:55-62. [PMID: 29747238 DOI: 10.1002/cm.21451] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/24/2018] [Accepted: 05/05/2018] [Indexed: 01/19/2023]
Abstract
Septins are conserved cytoskeletal proteins with unique filament forming capabilities and roles in cytokinesis and cell morphogenesis. Septins undergo hetero-oligomerization and assemble into higher order structures including filaments, rings, and cages. Hetero- and homotypic interactions of septin isoforms involve alternating GTPase (G)-domain interfaces and those mediated by N- and C-terminal extensions. While most septins bind GTP, display weak GTP-hydrolysis activity and incorporate guanine nucleotides in their interaction interfaces, studies using GTPase-inactivating mutations have failed to conclusively establish a crucial role for GTPase activity in mediating septin functions. In this mini-review, we will critically assess the role of GTP-binding and -hydrolysis on septin assembly and function. The relevance of G-domain activity will also be discussed in the context of human septin mutations as well as the development of specific small-molecules targeting septin polymerization. As structural determinants of septin oligomer interfaces, G-domains are attractive targets for ligand-based inhibition of septin assembly. Whether such an intervention can predictably alter septin function is a major question for future research.
Collapse
Affiliation(s)
- Megha Abbey
- Hannover Medical School, Institute of Cell Biochemistry, Hannover, 30625, Germany
| | - Matthias Gaestel
- Hannover Medical School, Institute of Cell Biochemistry, Hannover, 30625, Germany
| | - Manoj B Menon
- Hannover Medical School, Institute of Cell Biochemistry, Hannover, 30625, Germany
| |
Collapse
|
49
|
Septins are critical regulators of osteoclastic bone resorption. Sci Rep 2018; 8:13016. [PMID: 30158637 PMCID: PMC6115361 DOI: 10.1038/s41598-018-31159-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 08/07/2018] [Indexed: 12/23/2022] Open
Abstract
Septins are known to play key roles in supporting cytoskeletal stability, vesicular transport, endo-/exocytosis, stabilizing cellular membranes and forming diffusion barriers. Their function in mammalian cells is poorly investigated. The osteoclast offers an interesting tool to investigate septins because all cellular activities septins were reported to be involved in are critical for osteoclasts. However, the existence of septins in osteoclasts has not even been reported. Here we show that the SEPT9 gene and Septin 9 (SEPT9) protein are expressed and synthesized during differentiation of human osteoclasts. Pharmacological stabilization of septin filaments dose dependently inhibits bone resorption of human osteoclasts in vitro suggesting a role for septins in bone resorption. Attesting to this, conditional deletion of Sept9 in mice leads to elevated levels of trabecular bone and diminished femoral growth in vivo. Finally, systematic interrogation of the spatial organization of SEPT9 by confocal microscopy reveals that SEPT9 is closely associated to the structures known to be critical for osteoclast activity. We propose that septins in general and SEPT9 in particular play a previously unappreciated role in osteoclastic bone resorption.
Collapse
|
50
|
Functions of Rhotekin, an Effector of Rho GTPase, and Its Binding Partners in Mammals. Int J Mol Sci 2018; 19:ijms19072121. [PMID: 30037057 PMCID: PMC6073136 DOI: 10.3390/ijms19072121] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 07/13/2018] [Accepted: 07/17/2018] [Indexed: 12/26/2022] Open
Abstract
Rhotekin is an effector protein for small GTPase Rho. This protein consists of a Rho binding domain (RBD), a pleckstrin homology (PH) domain, two proline-rich regions and a C-terminal PDZ (PSD-95, Discs-large, and ZO-1)-binding motif. We, and other groups, have identified various binding partners for Rhotekin and carried out biochemical and cell biological characterization. However, the physiological functions of Rhotekin, per se, are as of yet largely unknown. In this review, we summarize known features of Rhotekin and its binding partners in neuronal tissues and cancer cells.
Collapse
|