1
|
Hajisadeghi S, Rafiei M, Tahmasebi E, Khafaei M. Evaluating the expression pattern of ATXN1 and CDC42EP1 genes and related long noncoding RNAs in oral squamous cell carcinoma. Mol Biol Rep 2024; 51:796. [PMID: 39002033 DOI: 10.1007/s11033-024-09719-8] [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: 05/10/2024] [Accepted: 06/11/2024] [Indexed: 07/15/2024]
Abstract
BACKGROUND Oral squamous cell carcinoma (OSCC) is a significant health issue worldwide, and the expression of long non-coding RNAs (lncRNAs) are altered in these malignancies. The present study evaluated the expression level of ATXN1 CDC42EP1 genes and the lncRNAs related to these genes (lnc-ATXN1L, lnc-ATXN1, lnc-ATXN10, and lnc-CDC42EP1) in paraffin blocks of oral and pharyngeal squamous cell carcinoma (SCC) samples from patients referred to Amir Alam Hospital in Tehran, Iran. METHODS AND RESULTS This cross-sectional study was conducted on 76 paraffin blocks of oral and pharyngeal squamous cell carcinoma (SCC) samples from patients referred to Amir Alam Hospital in Tehran. The expression levels of ATXN1, CDC42EP1, lnc-ATXN1L, lnc-ATXN1, lnc-ATXN10, and lnc-CDC42EP1 were measured in all samples using a qPCR Master Mix kit. Real-time PCR was used to perform the reactions, and GAPDH was considered the housekeeping gene. Statistical analyses were conducted utilizing the Statistical Package for the Social Sciences (SPSS) version 22.0. The expression of lnc-ATXN1, lnc-ATXN10, and lnc-CDC42EP1 significantly differed between the two groups. All of them were downregulated (p < 0.05), and no significant difference was observed between the SCC samples and the adjacent tissue in other genes (p > 0.05). The expression of genes was not related to age, sex, size, and tumor location (p > 0.05). CONCLUSIONS Dysexpression of lnc-ATXN1, lnc-ATXN10, and lnc-CDC42EP1 can be used for diagnosing OSCC.
Collapse
Affiliation(s)
- Samira Hajisadeghi
- Research Center for Prevention of Oral and Dental Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
- School of Dentistry, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | | | - Elahe Tahmasebi
- Research Center for Prevention of Oral and Dental Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
- School of Dentistry, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mostafa Khafaei
- Human Genetics Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
2
|
Kang PJ, Mullner R, Lian K, Park HO. Cdc42 couples septin recruitment to the axial landmark assembly via Axl2 in budding yeast. J Cell Sci 2024; 137:jcs261080. [PMID: 37712304 PMCID: PMC10617600 DOI: 10.1242/jcs.261080] [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: 02/19/2023] [Accepted: 09/11/2023] [Indexed: 09/16/2023] Open
Abstract
Cell polarization generally occurs along a single axis that is directed by a spatial cue. Cells of the budding yeast Saccharomyces cerevisiae undergo polarized growth and oriented cell division in a spatial pattern by selecting a specific bud site. Haploid a or α cells bud in the axial pattern in response to a transient landmark that includes Bud3, Bud4, Axl1 and Axl2. Septins, a family of filament-forming GTP-binding proteins, are also involved in axial budding and are recruited to an incipient bud site, but the mechanism of recruitment remains unclear. Here, we show that Axl2 interacts with Bud3 and the Cdc42 GTPase in its GTP-bound state. Axl2 also interacts with Cdc10, a septin subunit, promoting efficient recruitment of septins near the cell division site. Furthermore, a cdc42 mutant defective in the axial budding pattern at a semi-permissive temperature had a reduced interaction with Axl2 and compromised septin recruitment in the G1 phase. We thus propose that active Cdc42 brings Axl2 to the Bud3-Bud4 complex and that Axl2 then interacts with Cdc10, linking septin recruitment to the axial landmark.
Collapse
Affiliation(s)
- Pil Jung Kang
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| | - Rachel Mullner
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| | - Kendra Lian
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| | - Hay-Oak Park
- Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA
| |
Collapse
|
3
|
Xu Y, Ding K, Peng T. Chemical Proteomics Reveals N ε-Fatty-Acylation of Septins by Rho Inactivation Domain (RID) of the Vibrio MARTX Toxin to Alter Septin Localization and Organization. Mol Cell Proteomics 2024; 23:100730. [PMID: 38311109 PMCID: PMC10924143 DOI: 10.1016/j.mcpro.2024.100730] [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: 10/31/2023] [Revised: 01/16/2024] [Accepted: 01/31/2024] [Indexed: 02/06/2024] Open
Abstract
Vibrio species, the Gram-negative bacterial pathogens causing cholera and sepsis, produce multiple secreted virulence factors for infection and pathogenesis. Among these is the multifunctional-autoprocessing repeats-in-toxin (MARTX) toxin that releases several critical effector domains with distinct functions inside eukaryotic host cells. One such effector domain, the Rho inactivation domain (RID), has been discovered to catalyze long-chain Nε-fatty-acylation on lysine residues of Rho GTPases, causing inactivation of Rho GTPases and disruption of the host actin cytoskeleton. However, whether RID modifies other host proteins to exert additional functions remains to be determined. Herein, we describe the integration of bioorthogonal chemical labeling and quantitative proteomics to globally profile the target proteins modified by RID in living cells. More than 246 proteins are identified as new RID substrates, including many involved in GTPase regulation, cytoskeletal organization, and cell division. We demonstrate that RID extensively Nε-fatty-acylates septin proteins, the fourth cytoskeletal component of mammalian cells with important roles in diverse cellular processes. While affinity purification and mass spectrometry analysis show that RID-mediated Nε-fatty-acylation does not affect septin-septin interactions, this modification increases the membrane association of septins and confers localization to detergent-resistant membrane rafts. As a result, the filamentous assembly and organization of septins are disrupted by RID-mediated Nε-fatty-acylation, further contributing to cytoskeletal and mitotic defects that phenocopy the effects of septin depletion. Overall, our work greatly expands the substrate scope and function of RID and demonstrates the role of RID-mediated Nε-fatty-acylation in manipulating septin localization and organization.
Collapse
Affiliation(s)
- Yaxin Xu
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Ke Ding
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Tao Peng
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China; Shenzhen Bay Laboratory, Institute of Chemical Biology, Shenzhen, China.
| |
Collapse
|
4
|
Bandyopadhyay S, Zhang X, Ascura A, Edelblum KL, Bonder EM, Gao N. Salmonella engages CDC42 effector protein 1 for intracellular invasion. J Cell Physiol 2024; 239:36-50. [PMID: 37877586 DOI: 10.1002/jcp.31142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 08/25/2023] [Accepted: 10/03/2023] [Indexed: 10/26/2023]
Abstract
Human enterocytes are primary targets of infection by invasive bacterium Salmonella Typhimurium, and studies using nonintestinal epithelial cells established that S. Typhimurium activates Rho family GTPases, primarily CDC42, to modulate the actin cytoskeletal network for invasion. The host intracellular protein network that engages CDC42 and influences the pathogen's invasive capacity are relatively unclear. Here, proteomic analyses of canonical and variant CDC42 interactomes identified a poorly characterized CDC42 interacting protein, CDC42EP1, whose intracellular localization is rapidly redistributed and aggregated around the invading bacteria. CDC42EP1 associates with SEPTIN-7 and Villin, and its relocalization and bacterial engagement depend on host CDC42 and S. Typhimurium's capability of activating CDC42. Unlike CDC42, CDC42EP1 is not required for S. Typhimurium's initial cellular entry but is found to associate with Salmonella-containing vacuoles after long-term infections, indicating a contribution to the pathogen's intracellular growth and replication. These results uncover a new host regulator of enteric Salmonella infections, which may be targeted to restrict bacterial load at the primary site of infection to prevent systemic spread.
Collapse
Affiliation(s)
| | - Xiao Zhang
- Department of Biological Sciences, Rutgers University, Newark, New Jersey, USA
| | - Andrea Ascura
- Department of Biological Sciences, Rutgers University, Newark, New Jersey, USA
| | - Karen L Edelblum
- Department of Pathology, Immunology, and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Edward M Bonder
- Department of Biological Sciences, Rutgers University, Newark, New Jersey, USA
| | - Nan Gao
- Department of Biological Sciences, Rutgers University, Newark, New Jersey, USA
| |
Collapse
|
5
|
Liu X, Wu J, Yang B, Zhao Y, Wang Y, Pan S, Miao S, Wu X. hsa_circ_0005991 promotes epithelial-mesenchymal transition by regulating miR-30b-3p/Cdc42EP1 axis in ovary endometriosis. Genomics 2023; 115:110718. [PMID: 37757976 DOI: 10.1016/j.ygeno.2023.110718] [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: 06/22/2023] [Revised: 08/28/2023] [Accepted: 09/23/2023] [Indexed: 09/29/2023]
Abstract
Endometriosis is a common gynecological disease with an enigmatic pathogenesis. This work explored the function of hsa_circ_0005991 in ovarian endometriosis. High-throughput RNA-Seq was conducted in five matched ectopic (EC) and eutopic (EU) samples. Further, several types of cell function experiments were conducted. According to bioinformatics analysis, a competing endogenous RNA network was established. It included 5 circRNAs, 13 miRNAs, and 551 mRNAs. The expression levels of hsa_circ_0005991 and Cdc42EP1 were significantly elevated, while miR-30b-3p was reduced in the EC group. Upregulation of hsa_circ_0005991 raised Cdc42EP1 levels, induced EMT, and boosted Ishikawa cell proliferation, migration, and invasion. hsa_circ_0005991 knockdown indicated the opposite effects. When co-transfected with miR-30b-3p mimics or inhibitors, these effects could be reversed, respectively. Western blot assays showed alterations of EMT markers in EC samples. hsa_circ_0005991/miR-30b-3p/Cdc42EP1 axis promotes the EMT process in endometriosis, which may offer a theoretical foundation for the mechanism exploration and therapy of this disease.
Collapse
Affiliation(s)
- Xiaoxu Liu
- Department of Obstetrics and Gynecology, Hebei Medical University, Shijiazhuang, Hebei 050000, China; Department of Obstetrics and Gynecology, Shijiazhuang Maternity and Child Healthcare Hospital, Shijiazhuang, Hebei 050000, China
| | - Jing Wu
- College of Computer and Cyber Security, Hebei Normal University, Shijiazhuang, Hebei 050024, China
| | - Bo Yang
- Department of Obstetrics and Gynecology, Bethune International Peace Hospital, Shijiazhuang, Hebei 050082, China
| | - Yuanyuan Zhao
- Reproductive Medicine Center, The Fourth Hospital of Shijiazhuang Affiliated to Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Yafan Wang
- Department of Obstetrics and Gynecology, Shijiazhuang Maternity and Child Healthcare Hospital, Shijiazhuang, Hebei 050000, China
| | - Shuhong Pan
- Reproductive Medicine Center, The Fourth Hospital of Shijiazhuang Affiliated to Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Suibing Miao
- Reproductive Medicine Center, The Fourth Hospital of Shijiazhuang Affiliated to Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Xiaohua Wu
- Department of Obstetrics and Gynecology, Hebei Medical University, Shijiazhuang, Hebei 050000, China; Reproductive Medicine Center, The Fourth Hospital of Shijiazhuang Affiliated to Hebei Medical University, Shijiazhuang, Hebei 050000, China.
| |
Collapse
|
6
|
Kang PJ, Mullner R, Lian K, Park HO. Cdc42 couples septin recruitment to the axial landmark assembly via Axl2 in budding yeast. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.25.554823. [PMID: 37662239 PMCID: PMC10473694 DOI: 10.1101/2023.08.25.554823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Cell polarization generally occurs along a single axis that is directed by a spatial cue. Cells of the budding yeast Saccharomyces cerevisiae undergo polarized growth and oriented cell division in a spatial pattern by selecting a specific bud site. Haploid a or α cells bud in the axial pattern in response to a transient landmark that includes Bud3, Bud4, Axl1, and Axl2. Septins, a family of filament-forming GTP-binding proteins, are also involved in axial budding and recruited to an incipient bud site, but the mechanism of recruitment remains unclear. Here, we show that Axl2 interacts with Bud3 and the Cdc42 GTPase in its GTP-bound state. Axl2 also interacts with Cdc10, a septin subunit, promoting efficient recruitment of septins near the cell division site. Furthermore, a cdc42 mutant defective in the axial budding pattern at a semi-permissive temperature had a reduced interaction with Axl2 and compromised septin recruitment in the G1 phase. We thus propose that active Cdc42 brings Axl2 to the Bud3-Bud4 complex and that Axl2 then interacts with Cdc10, linking septin recruitment to the axial landmark.
Collapse
|
7
|
Tomasso MR, Padrick SB. BORG family proteins in physiology and human disease. Cytoskeleton (Hoboken) 2023; 80:182-198. [PMID: 37403807 DOI: 10.1002/cm.21768] [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: 12/11/2022] [Revised: 06/21/2023] [Accepted: 06/22/2023] [Indexed: 07/06/2023]
Abstract
The binder of rho GTPases (BORG)/Cdc42 effector proteins (Cdc42EP) family is composed of five Rho GTPase binding proteins whose functions and mechanism of actions are of emerging interest. Here, we review recent findings pertaining to the family as a whole and consider how these change our understanding of cellular organization. Recent studies have implicated BORGs in both fundamental physiology and in human diseases, mainly cancers. An emerging pattern suggests that BORG family members cancer-promoting properties are related to their ability to regulate the cytoskeleton, with many impacting the organization of acto-myosin stress fibers. This is consistent with the broader literature indicating that BORG family members are regulators of both the septin and actin cytoskeleton networks. The exact mechanism through which BORGs modify the cytoskeleton is not clear, but we consider here a few data-supported and speculative possibilities. Finally, we delve into how the Rho GTPase Cdc42 modifies BORG function in cells. This remains open-ended as Cdc42's effects on BORGs appear cell type- and cell state-dependent. Collectively, these data point to the importance of the BORG family and suggest broader themes in their function and regulation.
Collapse
Affiliation(s)
- Meagan R Tomasso
- Department of Biochemistry and Molecular Biology, Drexel University, Philadelphia, Pennsylvania, USA
| | - Shae B Padrick
- Department of Biochemistry and Molecular Biology, Drexel University, Philadelphia, Pennsylvania, USA
| |
Collapse
|
8
|
K S V Castro D, V D Rosa H, Mendonça DC, Cavini IA, P U Araujo A, Garratt RC. Dissecting the binding interface of the septin polymerization enhancer Borg BD3. J Mol Biol 2023; 435:168132. [PMID: 37121395 DOI: 10.1016/j.jmb.2023.168132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/02/2023]
Abstract
The molecular basis for septin filament assembly has begun to emerge over recent years. These filaments are essential for many septin functions which depend on their association with biological membranes or components of the cytoskeleton. Much less is known about how septins specifically interact with their binding partners. Here we describe the essential role played by the C-terminal domains in both septin polymerization and their association with the BD3 motif of the Borg family of Cdc42 effector proteins. We provide a detailed description, at the molecular level, of a previously reported interaction between BD3 and the NC-interface between SEPT6 and SEPT7. Upon ternary complex formation, the heterodimeric coiled coil formed by the C-terminal domains of the septins becomes stabilized and filament formation is promoted under conditions of ionic strength/protein concentration which are not normally permissible, likely by favouring hexamers over smaller oligomeric states. This demonstrates that binding partners, such as Borg's, have the potential to control filament assembly/disassembly in vivo in a way which can be emulated in vitro by altering the ionic strength. Experimentally validated models indicate that the BD3 peptide lies antiparallel to the coiled coil and is stabilized by a mixture of polar and apolar contacts. At its center, an LGPS motif, common to all human Borg sequences, interacts with charged residues from both helices of the coiled coil (K368 from SEPT7 and the conserved E354 from SEPT6) suggesting a universal mechanism which governs Borg-septin interactions.
Collapse
Affiliation(s)
- Danielle K S V Castro
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil; 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
| | - Deborah C Mendonça
- São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Italo A Cavini
- São Carlos Institute of Physics, 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
|
9
|
Smetanina MA, Korolenya VA, Kel AE, Sevostyanova KS, Gavrilov KA, Shevela AI, Filipenko ML. Epigenome-Wide Changes in the Cell Layers of the Vein Wall When Exposing the Venous Endothelium to Oscillatory Shear Stress. EPIGENOMES 2023; 7:epigenomes7010008. [PMID: 36975604 PMCID: PMC10048778 DOI: 10.3390/epigenomes7010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/10/2023] [Accepted: 03/13/2023] [Indexed: 03/29/2023] Open
Abstract
Epigenomic changes in the venous cells exerted by oscillatory shear stress towards the endothelium may result in consolidation of gene expression alterations upon vein wall remodeling during varicose transformation. We aimed to reveal such epigenome-wide methylation changes. Primary culture cells were obtained from non-varicose vein segments left after surgery of 3 patients by growing the cells in selective media after magnetic immunosorting. Endothelial cells were either exposed to oscillatory shear stress or left at the static condition. Then, other cell types were treated with preconditioned media from the adjacent layer's cells. DNA isolated from the harvested cells was subjected to epigenome-wide study using Illumina microarrays followed by data analysis with GenomeStudio (Illumina), Excel (Microsoft), and Genome Enhancer (geneXplain) software packages. Differential (hypo-/hyper-) methylation was revealed for each cell layer's DNA. The most targetable master regulators controlling the activity of certain transcription factors regulating the genes near the differentially methylated sites appeared to be the following: (1) HGS, PDGFB, and AR for endothelial cells; (2) HGS, CDH2, SPRY2, SMAD2, ZFYVE9, and P2RY1 for smooth muscle cells; and (3) WWOX, F8, IGF2R, NFKB1, RELA, SOCS1, and FXN for fibroblasts. Some of the identified master regulators may serve as promising druggable targets for treating varicose veins in the future.
Collapse
Affiliation(s)
- Mariya A Smetanina
- Laboratory of Pharmacogenomics, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Department of Fundamental Medicine, V. Zelman Institute for Medicine and Psychology, Novosibirsk State University (NSU), Novosibirsk 630090, Russia
| | - Valeria A Korolenya
- Laboratory of Pharmacogenomics, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Department of Natural Sciences, Novosibirsk State University (NSU), Novosibirsk 630090, Russia
| | - Alexander E Kel
- Laboratory of Pharmacogenomics, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Department of Research & Development, GeneXplain GmbH, D-38302 Wolfenbüttel, Germany
| | - Ksenia S Sevostyanova
- Center of New Medical Technologies, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Laboratory of Invasive Medical Technologies, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Department of Surgical Diseases, V. Zelman Institute for Medicine and Psychology, Novosibirsk State University (NSU), Novosibirsk 630090, Russia
| | - Konstantin A Gavrilov
- Center of New Medical Technologies, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Department of Surgical Diseases, V. Zelman Institute for Medicine and Psychology, Novosibirsk State University (NSU), Novosibirsk 630090, Russia
| | - Andrey I Shevela
- Center of New Medical Technologies, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Laboratory of Invasive Medical Technologies, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
- Department of Surgical Diseases, V. Zelman Institute for Medicine and Psychology, Novosibirsk State University (NSU), Novosibirsk 630090, Russia
| | - Maxim L Filipenko
- Laboratory of Pharmacogenomics, Institute of Chemical Biology and Fundamental Medicine (ICBFM) SB RAS, Novosibirsk 630090, Russia
| |
Collapse
|
10
|
Ojasalu K, Lieber S, Sokol AM, Nist A, Stiewe T, Bullwinkel I, Finkernagel F, Reinartz S, Müller-Brüsselbach S, Grosse R, Graumann J, Müller R. The lysophosphatidic acid-regulated signal transduction network in ovarian cancer cells and its role in actomyosin dynamics, cell migration and entosis. Theranostics 2023; 13:1921-1948. [PMID: 37064875 PMCID: PMC10091871 DOI: 10.7150/thno.81656] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 02/25/2023] [Indexed: 04/18/2023] Open
Abstract
Lysophosphatidic acid (LPA) species accumulate in the ascites of ovarian high-grade serous cancer (HGSC) and are associated with short relapse-free survival. LPA is known to support metastatic spread of cancer cells by activating a multitude of signaling pathways via G-protein-coupled receptors of the LPAR family. Systematic unbiased analyses of the LPA-regulated signal transduction network in ovarian cancer cells have, however, not been reported to date. Methods: LPA-induced signaling pathways were identified by phosphoproteomics of both patient-derived and OVCAR8 cells, RNA sequencing, measurements of intracellular Ca2+ and cAMP as well as cell imaging. The function of LPARs and downstream signaling components in migration and entosis were analyzed by selective pharmacological inhibitors and RNA interference. Results: Phosphoproteomic analyses identified > 1100 LPA-regulated sites in > 800 proteins and revealed interconnected LPAR1, ROCK/RAC, PKC/D and ERK pathways to play a prominent role within a comprehensive signaling network. These pathways regulate essential processes, including transcriptional responses, actomyosin dynamics, cell migration and entosis. A critical component of this signaling network is MYPT1, a stimulatory subunit of protein phosphatase 1 (PP1), which in turn is a negative regulator of myosin light chain 2 (MLC2). LPA induces phosphorylation of MYPT1 through ROCK (T853) and PKC/ERK (S507), which is majorly driven by LPAR1. Inhibition of MYPT1, PKC or ERK impedes both LPA-induced cell migration and entosis, while interference with ROCK activity and MLC2 phosphorylation selectively blocks entosis, suggesting that MYPT1 figures in both ROCK/MLC2-dependent and -independent pathways. We finally show a novel pathway governed by LPAR2 and the RAC-GEF DOCK7 to be indispensable for the induction of entosis. Conclusion: We have identified a comprehensive LPA-induced signal transduction network controlling LPA-triggered cytoskeletal changes, cell migration and entosis in HGSC cells. Due to its pivotal role in this network, MYPT1 may represent a promising target for interfering with specific functions of PP1 essential for HGSC progression.
Collapse
Affiliation(s)
- Kaire Ojasalu
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Sonja Lieber
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Anna M. Sokol
- Biomolecular Mass Spectrometry, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Andrea Nist
- Genomics Core Facility, Philipps University, Marburg, Germany
| | - Thorsten Stiewe
- Genomics Core Facility, Philipps University, Marburg, Germany
| | - Imke Bullwinkel
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Florian Finkernagel
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
- Bioinformatics Core Facility, Philipps University, Marburg, Germany
| | - Silke Reinartz
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Sabine Müller-Brüsselbach
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
| | - Robert Grosse
- Institut for Experimental and Clinical Pharmacology and Toxicology, Albert-Ludwigs University, Freiburg, Germany
| | - Johannes Graumann
- Biomolecular Mass Spectrometry, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
- Institute for Translational Proteomics, Philipps University, Marburg, Germany
| | - Rolf Müller
- Department of Translational Oncology, Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany
- ✉ Corresponding author: Rolf Müller, Center for Tumor Biology and Immunology (ZTI), Philipps University, Hans-Meerwein-Strasse 3, 35043 Marburg, Germany. . Phone: +49 6421 2866236
| |
Collapse
|
11
|
Li D, Liang J, Guo W, Zhang Y, Wu X, Zhang W. Integrative analysis of DNA methylation and gene expression data for the diagnosis and underlying mechanism of Parkinson’s disease. Front Aging Neurosci 2022; 14:971528. [PMID: 36062142 PMCID: PMC9434001 DOI: 10.3389/fnagi.2022.971528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundParkinson’s disease (PD) is the second most common progressive neurodegenerative disorder and the leading cause of disability in the daily activities. In the management of PD, accurate and specific biomarkers in blood for the early diagnosis of PD are urgently needed. DNA methylation is one of the main epigenetic mechanisms and associated with the gene expression and disease initiation of PD. We aimed to construct a methylation signature for the diagnosis of PD patients, and explore the potential value of DNA methylation in therapeutic options.Materials and methodsWhole blood DNA methylation and gene expression data of PD patients as well as healthy controls were extracted from Gene Expression Omnibus database. Next, differentially expressed genes (DEGs) and differentially methylated genes (DMGs) between PD patients and healthy controls were identified. Least absolute shrinkage and selection operator cox regression analysis was carried out to construct a diagnostic signature based on the overlapped genes. And, the receiver operating characteristic (ROC) curves were drawn and the area under the curve (AUC) was used to assess the diagnostic performance of the signature in both the training and testing datasets. Finally, gene ontology and gene set enrichment analysis were subsequently carried out to explore the underlying mechanisms.ResultsWe obtained a total of 9,596 DMGs, 1,058 DEGs, and 237 overlapped genes in the whole blood between PD patients and healthy controls. Eight methylation-driven genes (HIST1H4L, CDC42EP3, KIT, GNLY, SLC22A1, GCM1, INO80B, and ARHGAP26) were identified to construct the gene expression signature. The AUCs in predicting PD patients were 0.84 and 0.76 in training dataset and testing dataset, respectively. Additionally, eight methylation-altered CpGs were also identified to construct the CpGs signature which showed a similarly robust diagnostic capability, with AUCs of 0.8 and 0.73 in training dataset and testing dataset, respectively.ConclusionWe conducted an integrated analysis of the gene expression and DNA methylation data, and constructed a methylation-driven genes signature and a methylation-altered CpGs signature to distinguish the patients with PD from healthy controls. Both of them had a robust prediction power and provide a new insight into personalized diagnostic and therapeutic strategies for PD.
Collapse
Affiliation(s)
- Ding Li
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
- Henan Engineering Research Center for Tumor Precision Medicine and Comprehensive Evaluation, Henan Cancer Hospital, Zhengzhou, China
- Henan Provincial Key Laboratory of Anticancer Drug Research, Henan Cancer Hospital, Zhengzhou, China
| | - Jiaming Liang
- Department of Internal Medicine, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wenbin Guo
- Department of Pathology, Pingtan Comprehensive Experimental Area Hospital, Fuzhou, China
| | - Yongna Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
- Henan Engineering Research Center for Tumor Precision Medicine and Comprehensive Evaluation, Henan Cancer Hospital, Zhengzhou, China
- Henan Provincial Key Laboratory of Anticancer Drug Research, Henan Cancer Hospital, Zhengzhou, China
| | - Xuan Wu
- Academy of Medical Science, Zhengzhou University, Zhengzhou, China
- *Correspondence: Wenzhou Zhang,
| | - Wenzhou Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
- Henan Engineering Research Center for Tumor Precision Medicine and Comprehensive Evaluation, Henan Cancer Hospital, Zhengzhou, China
- Henan Provincial Key Laboratory of Anticancer Drug Research, Henan Cancer Hospital, Zhengzhou, China
- Xuan Wu,
| |
Collapse
|
12
|
Riba A, Oravecz A, Durik M, Jiménez S, Alunni V, Cerciat M, Jung M, Keime C, Keyes WM, Molina N. Cell cycle gene regulation dynamics revealed by RNA velocity and deep-learning. Nat Commun 2022; 13:2865. [PMID: 35606383 PMCID: PMC9126911 DOI: 10.1038/s41467-022-30545-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/06/2022] [Indexed: 11/15/2022] Open
Abstract
Despite the fact that the cell cycle is a fundamental process of life, a detailed quantitative understanding of gene regulation dynamics throughout the cell cycle is far from complete. Single-cell RNA-sequencing (scRNA-seq) technology gives access to these dynamics without externally perturbing the cell. Here, by generating scRNA-seq libraries in different cell systems, we observe cycling patterns in the unspliced-spliced RNA space of cell cycle-related genes. Since existing methods to analyze scRNA-seq are not efficient to measure cycling gene dynamics, we propose a deep learning approach (DeepCycle) to fit these patterns and build a high-resolution map of the entire cell cycle transcriptome. Characterizing the cell cycle in embryonic and somatic cells, we identify major waves of transcription during the G1 phase and systematically study the stages of the cell cycle. Our work will facilitate the study of the cell cycle in multiple cellular models and different biological contexts. Single-cell RNA-sequencing technology gives access to cell cycle dynamics without externally perturbing the cell. Here the authors present DeepCycle,a robust deep learning method to infer the cell cycle state in single cells from scRNA-seq data.
Collapse
|
13
|
β-Arrestin2 Is Critically Involved in the Differential Regulation of Phosphosignaling Pathways by Thyrotropin-Releasing Hormone and Taltirelin. Cells 2022; 11:cells11091473. [PMID: 35563779 PMCID: PMC9103620 DOI: 10.3390/cells11091473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 12/17/2022] Open
Abstract
In recent years, thyrotropin-releasing hormone (TRH) and its analogs, including taltirelin (TAL), have demonstrated a range of effects on the central nervous system that represent potential therapeutic agents for the treatment of various neurological disorders, including neurodegenerative diseases. However, the molecular mechanisms of their actions remain poorly understood. In this study, we investigated phosphosignaling dynamics in pituitary GH1 cells affected by TRH and TAL and the putative role of β-arrestin2 in mediating these effects. Our results revealed widespread alterations in many phosphosignaling pathways involving signal transduction via small GTPases, MAP kinases, Ser/Thr- and Tyr-protein kinases, Wnt/β-catenin, and members of the Hippo pathway. The differential TRH- or TAL-induced phosphorylation of numerous proteins suggests that these ligands exhibit some degree of biased agonism at the TRH receptor. The different phosphorylation patterns induced by TRH or TAL in β-arrestin2-deficient cells suggest that the β-arrestin2 scaffold is a key factor determining phosphorylation events after TRH receptor activation. Our results suggest that compounds that modulate kinase and phosphatase activity can be considered as additional adjuvants to enhance the potential therapeutic value of TRH or TAL.
Collapse
|
14
|
Umarao P, Rath PP, Gourinath S. Cdc42/Rac Interactive Binding Containing Effector Proteins in Unicellular Protozoans With Reference to Human Host: Locks of the Rho Signaling. Front Genet 2022; 13:781885. [PMID: 35186026 PMCID: PMC8847673 DOI: 10.3389/fgene.2022.781885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 01/14/2022] [Indexed: 11/23/2022] Open
Abstract
Small GTPases are the key to actin cytoskeleton signaling, which opens the lock of effector proteins to forward the signal downstream in several cellular pathways. Actin cytoskeleton assembly is associated with cell polarity, adhesion, movement and other functions in eukaryotic cells. Rho proteins, specifically Cdc42 and Rac, are the primary regulators of actin cytoskeleton dynamics in higher and lower eukaryotes. Effector proteins, present in an inactive state gets activated after binding to the GTP bound Cdc42/Rac to relay a signal downstream. Cdc42/Rac interactive binding (CRIB) motif is an essential conserved sequence found in effector proteins to interact with Cdc42 or Rac. A diverse range of Cdc42/Rac and their effector proteins have evolved from lower to higher eukaryotes. The present study has identified and further classified CRIB containing effector proteins in lower eukaryotes, focusing on parasitic protozoans causing neglected tropical diseases and taking human proteins as a reference point to the highest evolved organism in the evolutionary trait. Lower eukaryotes’ CRIB containing proteins fall into conventional effector molecules, PAKs (p21 activated kinase), Wiskoit-Aldrich Syndrome proteins family, and some have unique domain combinations unlike any known proteins. We also highlight the correlation between the effector protein isoforms and their selective specificity for Cdc42 or Rac proteins during evolution. Here, we report CRIB containing effector proteins; ten in Dictyostelium and Entamoeba, fourteen in Acanthamoeba, one in Trypanosoma and Giardia. CRIB containing effector proteins that have been studied so far in humans are potential candidates for drug targets in cancer, neurological disorders, and others. Conventional CRIB containing proteins from protozoan parasites remain largely elusive and our data provides their identification and classification for further in-depth functional validations. The tropical diseases caused by protozoan parasites lack combinatorial drug targets as effective paradigms. Targeting signaling mechanisms operative in these pathogens can provide greater molecules in combatting their infections.
Collapse
Affiliation(s)
- Preeti Umarao
- Structural Biology Lab, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Pragyan Parimita Rath
- Structural Biology Lab, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Samudrala Gourinath
- Structural Biology Lab, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| |
Collapse
|
15
|
Deduction of CDC42EP3 suppress development and progression of osteosarcoma. Exp Cell Res 2022; 412:113018. [PMID: 34998812 DOI: 10.1016/j.yexcr.2022.113018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 12/08/2021] [Accepted: 01/03/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Osteosarcoma is a disease with high mortality of malignant tumors in children and adolescents. CDC42 effector protein 3 (CDC42EP3) has been reported to be associated with human cancer cell progression. This study aimed to investigate the biological function and preliminary molecular mechanism of CDC42EP3 in osteosarcoma. METHODS CDC42EP3 expression in osteosarcoma was analyzed by immunohistochemical (IHC) staining. Secondly, the biological effects of CDC42EP3 in osteosarcoma cells was determined by loss/gain-of-function assays in vitro and in vivo. RESULTS CDC42EP3 expression was higher in osteosarcoma tissue than in noncancerous tissue. The expression of CDC42EP3 was positively correlated with age, pathological stage and grade of patients with osteosarcoma. Furthermore, downregulation of CDC42EP3 suppressed tumor progression by inhibiting proliferation, migration and inducing apoptosis in vivo. Importantly, knockdown of CDC42EP3 reduced the expression of interstitial markers (N-cadherin, Vimentin and Snail) and increased the expression of epithelial markers (E-cadherin). In addition, CDC42EP3 knockdown downregulated PI3K and reduced the phosphorylation levels of AKT and mTOR. The mice xenograft model further confirmed that CDC42EP3 knockdown inhibited osteosarcoma growth in vitro. CONCLUSIONS In summary, these findings highlighted the significance of CDC42EP3 in tumor progression, which implicated CDC42EP3 as a promising candidate molecular target for osteosarcoma therapy.
Collapse
|
16
|
Kandi R, Senger K, Grigoryan A, Soller K, Sakk V, Schuster T, Eiwen K, Menon MB, Gaestel M, Zheng Y, Florian MC, Geiger H. Cdc42-Borg4-Septin7 axis regulates HSC polarity and function. EMBO Rep 2021; 22:e52931. [PMID: 34661963 PMCID: PMC8647144 DOI: 10.15252/embr.202152931] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 09/13/2021] [Accepted: 09/17/2021] [Indexed: 01/03/2023] Open
Abstract
Aging of hematopoietic stem cells (HSCs) is caused by the elevated activity of the small RhoGTPase Cdc42 and an apolar distribution of proteins. Mechanisms by which Cdc42 activity controls polarity of HSCs are not known. Binder of RhoGTPases proteins (Borgs) are known effector proteins of Cdc42 that are able to regulate the cytoskeletal Septin network. Here, we show that Cdc42 interacts with Borg4, which in turn interacts with Septin7 to regulate the polar distribution of Cdc42, Borg4, and Septin7 within HSCs. Genetic deletion of either Borg4 or Septin7 results in a reduced frequency of HSCs polar for Cdc42 or Borg4 or Septin7, a reduced engraftment potential and decreased lymphoid‐primed multipotent progenitor (LMPP) frequency in the bone marrow. Taken together, our data identify a Cdc42‐Borg4‐Septin7 axis essential for the maintenance of polarity within HSCs and for HSC function and provide a rationale for further investigating the role of Borgs and Septins in the regulation of compartmentalization within stem cells.
Collapse
Affiliation(s)
- Ravinder Kandi
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | | | - Ani Grigoryan
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Karin Soller
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Vadim Sakk
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Tanja Schuster
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Karina Eiwen
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| | - Manoj B Menon
- Institute of Cell Biochemistry, Hannover Medical School, Hannover, Germany.,Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, India
| | - Matthias Gaestel
- Institute of Cell Biochemistry, Hannover Medical School, Hannover, Germany
| | - Yi Zheng
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | | | - Hartmut Geiger
- Institute of Molecular Medicine, Ulm University, Ulm, Germany
| |
Collapse
|
17
|
Iglesias MJ, Kruse LD, Sanchez-Rivera L, Enge L, Dusart P, Hong MG, Uhlén M, Renné T, Schwenk JM, Bergstrom G, Odeberg J, Butler LM. Identification of Endothelial Proteins in Plasma Associated With Cardiovascular Risk Factors. Arterioscler Thromb Vasc Biol 2021; 41:2990-3004. [PMID: 34706560 PMCID: PMC8608011 DOI: 10.1161/atvbaha.121.316779] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Supplemental Digital Content is available in the text. Objective: Endothelial cell (EC) dysfunction is a well-established response to cardiovascular disease risk factors, such as smoking and obesity. Risk factor exposure can modify EC signaling and behavior, leading to arterial and venous disease development. Here, we aimed to identify biomarker panels for the assessment of EC dysfunction, which could be useful for risk stratification or to monitor treatment response. Approach and Results: We used affinity proteomics to identify EC proteins circulating in plasma that were associated with cardiovascular disease risk factor exposure. Two hundred sixteen proteins, which we previously predicted to be EC-enriched across vascular beds, were measured in plasma samples (N=1005) from the population-based SCAPIS (Swedish Cardiopulmonary Bioimage Study) pilot. Thirty-eight of these proteins were associated with body mass index, total cholesterol, low-density lipoprotein, smoking, hypertension, or diabetes. Sex-specific analysis revealed that associations predominantly observed in female- or male-only samples were most frequently with the risk factors body mass index, or total cholesterol and smoking, respectively. We show a relationship between individual cardiovascular disease risk, calculated with the Framingham risk score, and the corresponding biomarker profiles. Conclusions: EC proteins in plasma could reflect vascular health status.
Collapse
Affiliation(s)
- Maria J Iglesias
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.).,Division of Internal Medicine, University Hospital of North Norway, Tromsø (M.J.I., J.O.)
| | - Larissa D Kruse
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Laura Sanchez-Rivera
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Linnea Enge
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Philip Dusart
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Mun-Gwan Hong
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Mathias Uhlén
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Thomas Renné
- Institute for Clinical Chemistry and Laboratory Medicine, University Medical Centre Hamburg-Eppendorf, Germany (T.R.).,Irish Centre for Vascular Biology, School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland (T.R.).,Centre for Thrombosis and Hemostasis (CTH), Johannes Gutenberg University Medical Center, Mainz, Germany (T.R.)
| | - Jochen M Schwenk
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.)
| | - Göran Bergstrom
- Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Sweden (G.B.)
| | - Jacob Odeberg
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.).,Division of Internal Medicine, University Hospital of North Norway, Tromsø (M.J.I., J.O.).,Department of Clinical Medicine, The Arctic University of Norway, Tromsø (J.O., L.M.B.).,Coagulation Unit, Department of Hematology (J.O.), Karolinska University Hospital, Stockholm, Sweden
| | - Lynn M Butler
- Science for Life Laboratory, Department of Protein Science, CBH, KTH Royal Institute of Technology, Stockholm, Sweden (M.J.I., L.D.K., L.S.-R., L.E., P.D., M.G.H., M.U., J.M.S., J.O., L.M.B.).,Department of Clinical Medicine, The Arctic University of Norway, Tromsø (J.O., L.M.B.).,Clinical Chemistry, Karolinska University Laboratory (L.M.B.), Karolinska University Hospital, Stockholm, Sweden.,Clinical Chemistry and Blood Coagulation Research, Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden (L.M.B.)
| |
Collapse
|
18
|
Casto AM, Seo S, Levine DM, Storer BE, Dong X, Hansen JA, Boeckh M, Martin PJ. Genetic variants associated with cytomegalovirus infection after allogeneic hematopoietic cell transplantation. Blood 2021; 138:1628-1636. [PMID: 34269803 PMCID: PMC8554648 DOI: 10.1182/blood.2021012153] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/01/2021] [Indexed: 11/20/2022] Open
Abstract
Human cytomegalovirus (CMV) reactivation is a frequent complication of allogeneic hematopoietic cell transplantation (HCT). Despite routine screening for CMV reactivation and early antiviral treatment, the rates of CMV-related complications after HCT remain high. Genetic variants in both the donor and recipient have been associated with the risk of CMV reactivation and disease after HCT, but these associations have not been validated, and their clinical importance remains unclear. In this study, we assessed 117 candidate variants previously associated with CMV-related phenotypes for association with CMV reactivation and disease in a cohort of 2169 CMV-seropositive HCT recipients. We also carried out a genome-wide association study (GWAS) for CMV reactivation and disease in the same cohort. Both analyses used a prespecified discovery and replication approach to control the risk of false-positive results. Among the 117 candidate variants, our analysis implicates only the donor ABCB1 rs1045642 genotype as a risk factor for CMV reactivation. This synonymous variant in P-glycoprotein may influence the risk of CMV reactivation by altering the efflux of cyclosporine and tacrolimus from donor lymphocytes. In the GWAS analysis, the donor CDC42EP3 rs11686168 genotype approached the significance threshold for association with CMV reactivation, although we could not identify a mechanism to explain this association. The results of this study suggest that most genomic variants previously associated with CMV phenotypes do not significantly alter the risk for CMV reactivation or disease after HCT.
Collapse
Affiliation(s)
- Amanda M Casto
- Department of Medicine, University of Washington School of Medicine, Seattle, WA
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Sachiko Seo
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Hematology and Oncology, Dokkyo Medical University, Tochigi, Japan
| | - David M Levine
- Department of Biostatistics, University of Washington, Seattle, WA; and
| | - Barry E Storer
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Xinyuan Dong
- Department of Biostatistics, University of Washington, Seattle, WA; and
| | - John A Hansen
- Department of Medicine, University of Washington School of Medicine, Seattle, WA
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Michael Boeckh
- Department of Medicine, University of Washington School of Medicine, Seattle, WA
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Paul J Martin
- Department of Medicine, University of Washington School of Medicine, Seattle, WA
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| |
Collapse
|
19
|
Yan Y, Liang Q, Xu Z, Yi Q. Integrative bioinformatics and experimental analysis revealed down-regulated CDC42EP3 as a novel prognostic target for ovarian cancer and its roles in immune infiltration. PeerJ 2021; 9:e12171. [PMID: 34616622 PMCID: PMC8449529 DOI: 10.7717/peerj.12171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/26/2021] [Indexed: 02/05/2023] Open
Abstract
Ovarian cancer is a significant clinical challenge as no effective treatments are available to enhance patient survival. Recently, N6-methyladenosine (m6A) RNA modification has been demonstrated to play a pivotal role in tumorigenesis and progression. However, the roles of m6A target genes in ovarian cancer haven’t been clearly illustrated. In this study, we presented a comprehensive bioinformatics and in vitro analysis to evaluate the roles of m6A target genes. Cell division cycle 42 effector protein 3 (CDC42EP3), one probable m6A target gene, was identified to be down-regulated in ovarian cancer tissues and cells. Meanwhile, quantitative PCR (qPCR) and western blot were used to confirm the down-regulated CDC42EP3 in ovarian cancer cells A2780 and TOV112D. The biological function of CDC42EP3 in ovarian cancer was further validated with several algorithms, such as PrognoScan, K-M plotter, LinkedOmics and TISIDB. These findings indicated that lower expression of CDC42EP3 was correlated with poor prognosis in patients with ovarian cancer. In addition, CDC42EP3 expression was significantly associated with a diverse range of tumor-infiltrating immune cells, including natural killer cells (NK), T central memory cells (Tcm), T gamma delta cells (Tgd), etc. Taken together, this study uncovered the potential roles of m6A target gene CDC42EP3 in the regulation of immune microenvironment in the ovarian cancer, and identified CDC42EP3 as a novel prognostic target.
Collapse
Affiliation(s)
- Yuanliang Yan
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiuju Liang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhijie Xu
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiaoli Yi
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| |
Collapse
|
20
|
Benoit B, Baillet A, Poüs C. Cytoskeleton and Associated Proteins: Pleiotropic JNK Substrates and Regulators. Int J Mol Sci 2021; 22:8375. [PMID: 34445080 PMCID: PMC8395060 DOI: 10.3390/ijms22168375] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/28/2021] [Accepted: 07/30/2021] [Indexed: 12/12/2022] Open
Abstract
This review extensively reports data from the literature concerning the complex relationships between the stress-induced c-Jun N-terminal kinases (JNKs) and the four main cytoskeleton elements, which are actin filaments, microtubules, intermediate filaments, and septins. To a lesser extent, we also focused on the two membrane-associated cytoskeletons spectrin and ESCRT-III. We gather the mechanisms controlling cytoskeleton-associated JNK activation and the known cytoskeleton-related substrates directly phosphorylated by JNK. We also point out specific locations of the JNK upstream regulators at cytoskeletal components. We finally compile available techniques and tools that could allow a better characterization of the interplay between the different types of cytoskeleton filaments upon JNK-mediated stress and during development. This overview may bring new important information for applied medical research.
Collapse
Affiliation(s)
- Béatrice Benoit
- Université Paris-Saclay, INSERM UMR-S-1193, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France; (A.B.); (C.P.)
| | - Anita Baillet
- Université Paris-Saclay, INSERM UMR-S-1193, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France; (A.B.); (C.P.)
| | - Christian Poüs
- Université Paris-Saclay, INSERM UMR-S-1193, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France; (A.B.); (C.P.)
- Biochimie-Hormonologie, AP-HP Université Paris-Saclay, Site Antoine Béclère, 157 Rue de la Porte de Trivaux, 92141 Clamart, France
| |
Collapse
|
21
|
Jeong D, Ham J, Kim HW, Kim H, Ji HW, Yun SH, Park JE, Lee KS, Jo H, Han JH, Jung SY, Lee S, Lee ES, Kang HS, Kim SJ. ELOVL2: a novel tumor suppressor attenuating tamoxifen resistance in breast cancer. Am J Cancer Res 2021; 11:2568-2589. [PMID: 34249416 PMCID: PMC8263635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 04/25/2021] [Indexed: 06/13/2023] Open
Abstract
Epigenetic events have successfully explained the cause of various cancer types, but little is known about tamoxifen resistance (TamR) that induces cancer recurrence. In this study, via genome-wide methylation analysis in MCF-7/TamR cells we show that elongation of very-long chain fatty acid protein 2 (ELOVL2) was hypermethylated and downregulated in the samples from TamR breast cancer patients (n = 28) compared with those from Tam-sensitive (TamS) patients (n = 33) (P < 0.001). Strikingly, in addition to having tumor suppressor activity, ELOVL2 was shown to recover Tam sensitivity up to 70% in the MCF-7/TamR cells and in a xenograft mouse model. A group of genes in the AKT and ERa signaling pathways, e.g., THEM4, which play crucial roles in drug resistance, were found to be regulated by ELOVL2. This study implies that the deregulation of a gene in fatty acid metabolism can lead to drug resistance, giving insight into the development of a new therapeutic strategy for drug-resistant breast cancer.
Collapse
Affiliation(s)
- Dawoon Jeong
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
- Current address: AprogenSungnam 13215, Republic of Korea
| | - Juyeon Ham
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
- Current address: Kogene BiotechSeoul 08507, Republic of Korea
| | - Hyeon Woo Kim
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
| | - Heejoo Kim
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
| | - Hwee Won Ji
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
| | - Sung Hwan Yun
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
| | - Jae Eun Park
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
| | - Keun Seok Lee
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - Heein Jo
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - Jai Hong Han
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - So-Youn Jung
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - Seeyoun Lee
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - Eun Sook Lee
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - Han-Sung Kang
- Research Institute and Hospital, National Cancer CenterGoyang, Republic of Korea
| | - Sun Jung Kim
- Department of Life Science, Dongguk University-SeoulGoyang, Republic of Korea
| |
Collapse
|
22
|
Chen W, Zhu Y, Zhang W, Zhang H, Zhou Y, Sun P, Wu G. CDC42EP3 is a key promoter involved in the development and progression of gastric cancer. Carcinogenesis 2021; 42:1179-1188. [PMID: 34111280 DOI: 10.1093/carcin/bgab048] [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] [Received: 09/30/2020] [Revised: 05/19/2021] [Accepted: 06/08/2021] [Indexed: 12/13/2022] Open
Abstract
Gastric cancer (GC) is one of the most prevalent cancers and severely endangers human health. Due to the low rate of diagnosis, most patients with gastric cancer are diagnosed as advanced. CDC42 effector protein 3 (CDC42EP3) has been revealed to be involved in several types of human cancers' development and progression. However, the function of CDC42EP3 in GC is not yet clear. CDC42EP3 expression was detected by immunohistochemistry (IHC), qRT-PCR and Western blot assay in tumor tissues and cell lines of GC. CDC42EP3 knockdown cell models were constructed by lentivirus transfection. Cell proliferation was evaluated by the MTT assay. The wound-healing assay and the transwell assay were utilized to assess the cell migration. Also, the cell apoptosis and the cell cycle were evaluated by flow cytometry. Moreover, the mechanism was investigated by Human Apoptosis Antibody Array. The in vivo experiments were conducted to verify the effects of CDC42EP3 knockdown on the tumor growth of GC. The expression level of CDC42EP3 was up-regulated in tumor tissues. High CDC42EP3 expression was positively related to more advanced tumor grade. CDC42EP3 knockdown inhibited cell proliferation and migration, promoted cell apoptosis and suppressed the tumor growth. On the other hand, it was also found that the silencing of CDC42EP3 inhibited HSP27 and IGF-1sR expression as well as promoted Caspase3, p53, TNF-α, TNF-β, TRAILR-1 and TRAILR-2 expression. CDC42EP3 was revealed to work as a tumor promoter in the development and progression of GC, which could be a promising therapeutic target for the therapy of GC.
Collapse
Affiliation(s)
- Wenchao Chen
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| | - Yuanzeng Zhu
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| | - Wei Zhang
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| | - Han Zhang
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| | - Yang Zhou
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| | - Peichun Sun
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| | - Gang Wu
- Department of gastrointestinal surgery, Henan Provincial People's Hospital, Zhengzhou, Henan, 450003, China.,Zhengzhou University People's Hospital, Zhengzhou, Henan, 450003, China.,Henan University People's Hospital, Zhengzhou, Henan, 450003, China
| |
Collapse
|
23
|
Yang C, Tian C, Hoffman TE, Jacobsen NK, Spencer SL. Melanoma subpopulations that rapidly escape MAPK pathway inhibition incur DNA damage and rely on stress signalling. Nat Commun 2021; 12:1747. [PMID: 33741929 PMCID: PMC7979728 DOI: 10.1038/s41467-021-21549-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 01/28/2021] [Indexed: 12/11/2022] Open
Abstract
Despite the increasing number of effective anti-cancer therapies, successful treatment is limited by the development of drug resistance. While the contribution of genetic factors to drug resistance is undeniable, little is known about how drug-sensitive cells first evade drug action to proliferate in drug. Here we track the responses of thousands of single melanoma cells to BRAF inhibitors and show that a subset of cells escapes drug via non-genetic mechanisms within the first three days of treatment. Cells that escape drug rely on ATF4 stress signalling to cycle periodically in drug, experience DNA replication defects leading to DNA damage, and yet out-proliferate other cells over extended treatment. Together, our work reveals just how rapidly melanoma cells can adapt to drug treatment, generating a mutagenesis-prone subpopulation that expands over time.
Collapse
Affiliation(s)
- Chen Yang
- Department of Biochemistry, University of Colorado Boulder, Boulder, CO, USA.,BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA.,Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Chengzhe Tian
- Department of Biochemistry, University of Colorado Boulder, Boulder, CO, USA.,BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA
| | - Timothy E Hoffman
- Department of Biochemistry, University of Colorado Boulder, Boulder, CO, USA.,BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA
| | - Nicole K Jacobsen
- Department of Biochemistry, University of Colorado Boulder, Boulder, CO, USA.,BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA
| | - Sabrina L Spencer
- Department of Biochemistry, University of Colorado Boulder, Boulder, CO, USA. .,BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA.
| |
Collapse
|
24
|
Magalhaes YT, Farias JO, Silva LE, Forti FL. GTPases, genome, actin: A hidden story in DNA damage response and repair mechanisms. DNA Repair (Amst) 2021; 100:103070. [PMID: 33618126 DOI: 10.1016/j.dnarep.2021.103070] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 12/18/2022]
Abstract
The classical small Rho GTPase (Rho, Rac, and Cdc42) protein family is mainly responsible for regulating cell motility and polarity, membrane trafficking, cell cycle control, and gene transcription. Cumulative recent evidence supports important roles for these proteins in the maintenance of genomic stability. Indeed, DNA damage response (DDR) and repair mechanisms are some of the prime biological processes that underlie several disease phenotypes, including genetic disorders, cancer, senescence, and premature aging. Many reports guided by different experimental approaches and molecular hypotheses have demonstrated that, to some extent, direct modulation of Rho GTPase activity, their downstream effectors, or actin cytoskeleton regulation contribute to these cellular events. Although much attention has been paid to this family in the context of canonical actin cytoskeleton remodeling, here we provide a contextualized review of the interplay between Rho GTPase signaling pathways and the DDR and DNA repair signaling components. Interesting questions yet to be addressed relate to the spatiotemporal dynamics of this collective response and whether it correlates with different subcellular pools of Rho GTPases. We highlight the direct and indirect targets, some of which still lack experimental validation data, likely associated with Rho GTPase activation that provides compelling evidence for further investigation in DNA damage-associated events and with potential therapeutic applications in translational medicine.
Collapse
Affiliation(s)
- Yuli T Magalhaes
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | - Jessica O Farias
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | - Luiz E Silva
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | - Fabio L Forti
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil.
| |
Collapse
|
25
|
Campbell BR, Chen Z, Faden DL, Agrawal N, Li RJ, Hanna GJ, Iyer NG, Boot A, Rozen SG, Vettore AL, Panda B, Krishnan NM, Pickering CR, Myers JN, Guo X, Lang Kuhs KA. The mutational landscape of early- and typical-onset oral tongue squamous cell carcinoma. Cancer 2020; 127:544-553. [PMID: 33146897 DOI: 10.1002/cncr.33309] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/30/2020] [Accepted: 10/08/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND The incidence of oral tongue squamous cell carcinoma (OTSCC) is increasing among younger birth cohorts. The etiology of early-onset OTSCC (diagnosed before the age of 50 years) and cancer driver genes remain largely unknown. METHODS The Sequencing Consortium of Oral Tongue Cancer was established through the pooling of somatic mutation data of oral tongue cancer specimens (n = 227 [107 early-onset cases]) from 7 studies and The Cancer Genome Atlas. Somatic mutations at microsatellite loci and Catalog of Somatic Mutations in Cancer mutation signatures were identified. Cancer driver genes were identified with the MutSigCV and WITER algorithms. Mutation comparisons between early- and typical-onset OTSCC were evaluated via linear regression with adjustments for patient-related factors. RESULTS Two novel driver genes (ATXN1 and CDC42EP1) and 5 previously reported driver genes (TP53, CDKN2A, CASP8, NOTCH1, and FAT1) were identified. Six recurrent mutations were identified, with 4 occurring in TP53. Early-onset OTSCC had significantly fewer nonsilent mutations even after adjustments for tobacco use. No associations of microsatellite locus mutations and mutation signatures with the age of OTSCC onset were observed. CONCLUSIONS This international, multicenter consortium is the largest study to characterize the somatic mutational landscape of OTSCC and the first to suggest differences by age of onset. This study validates multiple previously identified OTSCC driver genes and proposes 2 novel cancer driver genes. In analyses by age, early-onset OTSCC had a significantly smaller somatic mutational burden that was not explained by differences in tobacco use. LAY SUMMARY This study identifies 7 specific areas in the human genetic code that could be responsible for promoting the development of tongue cancer. Tongue cancer in young patients (under the age of 50 years) has fewer overall changes to the genetic code in comparison with tongue cancer in older patients, but the authors do not think that this is due to differences in smoking rates between the 2 groups. The cause of increasing cases of tongue cancer in young patients remains unclear.
Collapse
Affiliation(s)
- Benjamin R Campbell
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Zhishan Chen
- Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Ingram Cancer Center, Nashville, Tennessee
| | - Daniel L Faden
- Head and Neck Surgical Oncology, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Nishant Agrawal
- Section of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Chicago Pritzker School of Medicine, Chicago, Illinois
| | - Ryan J Li
- Department of Otolaryngology-Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon
| | - Glenn J Hanna
- Harvard Medical School, Boston, Massachusetts.,Center for Head and Neck Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - N Gopalakrishna Iyer
- Department of Head and Neck Surgery, National Cancer Centre Singapore, Singapore, Singapore
| | - Arnoud Boot
- Center for Computational Biology, Duke-NUS Medical School, Singapore, Singapore
| | - Steven G Rozen
- Center for Computational Biology, Duke-NUS Medical School, Singapore, Singapore
| | - Andre L Vettore
- Department of Biological Sciences, Federal University of São Paulo, São Paulo, Brazil
| | - Binay Panda
- School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | | | - Curtis R Pickering
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jeffrey N Myers
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xingyi Guo
- Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Ingram Cancer Center, Nashville, Tennessee.,Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Krystle A Lang Kuhs
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee.,Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Vanderbilt Ingram Cancer Center, Nashville, Tennessee.,Department of Epidemiology, College of Public Health, University of Kentucky, Lexington, Kentucky
| |
Collapse
|
26
|
Lee YT, Tan YJ, Falasca M, Oon CE. Cancer-Associated Fibroblasts: Epigenetic Regulation and Therapeutic Intervention in Breast Cancer. Cancers (Basel) 2020; 12:E2949. [PMID: 33066013 PMCID: PMC7600259 DOI: 10.3390/cancers12102949] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/24/2020] [Accepted: 09/30/2020] [Indexed: 02/06/2023] Open
Abstract
Breast cancer is the leading cause of cancer-related mortality in women worldwide. Cancer-associated fibroblasts (CAFs) are a heterogeneous population of cells in the solid tumour microenvironment. These cells are positively linked to breast cancer progression. Breast CAFs can be categorised into distinct subtypes according to their roles in breast carcinogenesis. Epigenetic modifications change gene expression patterns as a consequence of altered chromatin configuration and DNA accessibility to transcriptional machinery, without affecting the primary structure of DNA. Epigenetic dysregulation in breast CAFs may enhance breast cancer cell survival and ultimately lead to therapeutic resistance. A growing body of evidence has described epigenetic modulators that target histones, DNA, and miRNA as a promising approach to treat cancer. This review aims to summarise the current findings on the mechanisms involved in the epigenetic regulation in breast CAFs and discusses the potential therapeutic strategies via targeting these factors.
Collapse
Affiliation(s)
- Yeuan Ting Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; (Y.T.L.); (Y.J.T.)
| | - Yi Jer Tan
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; (Y.T.L.); (Y.J.T.)
| | - Marco Falasca
- Metabolic Signalling Group, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Penang 11800, Malaysia; (Y.T.L.); (Y.J.T.)
| |
Collapse
|
27
|
Yao L, Shippy T, Li Y. Genetic analysis of the molecular regulation of electric fields-guided glia migration. Sci Rep 2020; 10:16821. [PMID: 33033380 PMCID: PMC7546725 DOI: 10.1038/s41598-020-74085-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 08/31/2020] [Indexed: 11/09/2022] Open
Abstract
In a developing nervous system, endogenous electric field (EF) influence embryonic growth. We reported the EF-directed migration of both rat Schwann cells (SCs) and oligodendrocyte precursor cells (OPCs) and explored the molecular mechanism using RNA-sequencing assay. However, previous studies revealed the differentially expressed genes (DEGs) associated with EF-guided migration of SCs or OPCs alone. In this study, we performed joint differential expression analysis on the RNA-sequencing data from both cell types. We report a number of significantly enriched gene ontology (GO) terms that are related to the cytoskeleton, cell adhesion, and cell migration. Of the DEGs associated with these terms, nine up-regulated DEGs and 32 down-regulated DEGs showed the same direction of effect in both SCs and OPCs stimulated with EFs, while the remaining DEGs responded differently. Thus, our study reveals the similarities and differences in gene expression and cell migration regulation of different glial cell types in response to EF stimulation.
Collapse
Affiliation(s)
- Li Yao
- Department of Biological Sciences, Wichita State University, 1845 Fairmount Street, Wichita, KS, 67260, USA.
| | - Teresa Shippy
- Bioinformatics Specialist, KSU Bioinformatics Center, Kansas State University, Manhattan, KS, 66506, USA
| | - Yongchao Li
- Department of Biological Sciences, Wichita State University, 1845 Fairmount Street, Wichita, KS, 67260, USA
| |
Collapse
|
28
|
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
|
29
|
Pan Q, Guo CJ, Xu QY, Wang JZ, Li H, Fang CH. miR-16 integrates signal pathways in myofibroblasts: determinant of cell fate necessary for fibrosis resolution. Cell Death Dis 2020; 11:639. [PMID: 32801294 PMCID: PMC7429878 DOI: 10.1038/s41419-020-02832-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/14/2022]
Abstract
Liver fibrosis is characterized by the transdifferentiation of hepatic stellate cells (HSCs) to myofibroblasts and poor response to treatment. This can be attributed to the myofibroblast-specific resistance to phenotype reversal. In this study, we complemented miR-16 into miR-16-deficient myofibroblasts and analyzed the global role of miR-16 using transcriptome profiling and generating a pathway-based action model underlying transcriptomic regulation. Phenotypic analysis of myofibroblasts and fibrogenic characterization were used to understand the effect of miR-16 on phenotypic remodeling of myofibroblasts. miR-16 expression altered the transcriptome of myofibroblasts to resemble that of HSCs. Simultaneous targeting of Smad2 and Wnt3a, etc. by miR-16 integrated signaling pathways of TGF-β and Wnt, etc., which underlay the comprehensive regulation of transcriptome. The synergistic effect of miR-16 on the signaling pathways abolished the phenotypic characteristics of myofibroblasts, including collagen production and inhibition of adipogenesis. In vivo, myofibroblast-specific expression of miR-16 not only eliminated mesenchymal cells with myofibroblast characteristics but also restored the phenotype of HSCs in perisinusoidal space. This phenotypic remodeling resolved liver fibrosis induced by chronic wound healing. Therefore, miR-16 may integrate signaling pathways crucial for the fate determination of myofibroblasts. Its global effect induces the reversal of HSC-to-myofibroblast transdifferentiation and, subsequently, the resolution of fibrogenesis. Taken together, these findings highlight the potential of miR-16 as a promising therapeutic target for liver fibrosis.
Collapse
Affiliation(s)
- Qin Pan
- Department of Gastroenterology, Xin-Hua Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200092, China.
| | - Can-Jie Guo
- Department of Gastroenterology, Ren-Ji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200001, China
| | - Qing-Yang Xu
- Department of Gastroenterology, Xin-Hua Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200092, China
| | - Jin-Zhi Wang
- Department of Gastroenterology, Xin-Hua Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200092, China
| | - Han Li
- Department of Gastroenterology, Xin-Hua Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200092, China
| | - Chun-Hua Fang
- School of Electronics and Information Engineering, Tong-Ji University, Shanghai, 201804, China
| |
Collapse
|
30
|
Eduardo da Silva L, Russo LC, Forti FL. Overactivated Cdc42 acts through Cdc42EP3/Borg2 and NCK to trigger DNA damage response signaling and sensitize cells to DNA-damaging agents. Exp Cell Res 2020; 395:112206. [PMID: 32739212 DOI: 10.1016/j.yexcr.2020.112206] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 07/21/2020] [Accepted: 07/26/2020] [Indexed: 12/23/2022]
Abstract
The small GTPase Cdc42, a member of the Rho family, regulates essential biological processes such as cytoskeleton remodeling, migration, vesicular trafficking and cell cycle. It was demonstrated that Cdc42 overactivation through different molecular strategies increases cell sensitivity to genotoxic stress and affects the phosphorylation status of DNA damage response proteins by unknown mechanisms. By using a combination of approaches including affinity purification/mass spectrometry (AP/MS) and colocalization microscopy analysis we were able to identify Cdc42EP3/Borg2 as a putative molecular effector of these molecular and cellular events that seem to be independent of cell line or DNA damage stimuli. We then investigated the influence of Cdc42EP3/Borg2 and other potential protein partners, such as the NCK and Septin2 proteins, which could mediate cellular responses to genotoxic stress under different backgrounds of Cdc42 activity. Clonogenic assays showed a reduced cell survival when ectopically expressing the Cdc42EP3/Borg2, NCK2 or Septin2 in an overactivated Cdc42-dependent background. Moreover, endogenous NCK appears to relocate into the nucleus upon Cdc42 overactivation, especially under genotoxic stress, and promotes the suppression of Chk1 phosphorylation. In sum, our findings reinforce Cdc42 as an important player involved in the DNA damage response acting through Cdc42EP3/Borg2 and NCK proteins following genomic instability conditions.
Collapse
Affiliation(s)
- Luiz Eduardo da Silva
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | - Lilian Cristina Russo
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | - Fabio Luis Forti
- Laboratory of Biomolecular Systems Signaling, Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil.
| |
Collapse
|
31
|
Silva LE, Souza RC, Kitano ES, Monteiro LF, Iwai LK, Forti FL. Proteomic and Interactome Approaches Reveal PAK4, PHB-2, and 14-3-3η as Targets of Overactivated Cdc42 in Cellular Responses to Genomic Instability. J Proteome Res 2019; 18:3597-3614. [DOI: 10.1021/acs.jproteome.9b00260] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Luiz E. Silva
- Laboratory of Signaling in Biomolecular Systems (LSSB), Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo-SP CEP 05508-900, Brazil
| | - Renan C. Souza
- Laboratory of Signaling in Biomolecular Systems (LSSB), Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo-SP CEP 05508-900, Brazil
| | - Eduardo S. Kitano
- Special Laboratory of Applied Toxicology (LETA), Center of Toxins, Immune-Response and Cell Signaling (CeTICS), Butantan Institute, São Paulo-SP 05503-000, Brazil
| | - Lucas F. Monteiro
- Laboratory of Signaling in Biomolecular Systems (LSSB), Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo-SP CEP 05508-900, Brazil
| | - Leo K. Iwai
- Special Laboratory of Applied Toxicology (LETA), Center of Toxins, Immune-Response and Cell Signaling (CeTICS), Butantan Institute, São Paulo-SP 05503-000, Brazil
| | - Fabio L. Forti
- Laboratory of Signaling in Biomolecular Systems (LSSB), Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo-SP CEP 05508-900, Brazil
| |
Collapse
|
32
|
Wakeham CM, Wilmarth PA, Cunliffe JM, Klimek JE, Ren G, David LL, Morgans CW. Identification of PKCα-dependent phosphoproteins in mouse retina. J Proteomics 2019; 206:103423. [PMID: 31255707 DOI: 10.1016/j.jprot.2019.103423] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/11/2019] [Accepted: 06/19/2019] [Indexed: 12/11/2022]
Abstract
Adjusting to a wide range of light intensities is an essential feature of retinal rod bipolar cell (RBC) function. While persuasive evidence suggests this modulation involves phosphorylation by protein kinase C-alpha (PKCα), the targets of PKCα phosphorylation in the retina have not been identified. PKCα activity and phosphorylation in RBCs was examined by immunofluorescence confocal microscopy using a conformation-specific PKCα antibody and antibodies to phosphorylated PKC motifs. PKCα activity was dependent on light and expression of TRPM1, and RBC dendrites were the primary sites of light-dependent phosphorylation. PKCα-dependent retinal phosphoproteins were identified using a phosphoproteomics approach to compare total protein and phosphopeptide abundance between phorbol ester-treated wild type and PKCα knockout (PKCα-KO) mouse retinas. Phosphopeptide mass spectrometry identified over 1100 phosphopeptides in mouse retina, with 12 displaying significantly greater phosphorylation in WT compared to PKCα-KO samples. The differentially phosphorylated proteins fall into the following functional groups: cytoskeleton/trafficking (4 proteins), ECM/adhesion (2 proteins), signaling (2 proteins), transcriptional regulation (3 proteins), and homeostasis/metabolism (1 protein). Two strongly differentially expressed phosphoproteins, BORG4 and TPBG, were localized to the synaptic layers of the retina, and may play a role in PKCα-dependent modulation of RBC physiology. Data are available via ProteomeXchange with identifier PXD012906. SIGNIFICANCE: Retinal rod bipolar cells (RBCs), the second-order neurons of the mammalian rod visual pathway, are able to modulate their sensitivity to remain functional across a wide range of light intensities, from starlight to daylight. Evidence suggests that this modulation requires the serine/threonine kinase, PKCα, though the specific mechanism by which PKCα modulates RBC physiology is unknown. This study examined PKCα phosophorylation patterns in mouse rod bipolar cells and then used a phosphoproteomics approach to identify PKCα-dependent phosphoproteins in the mouse retina. A small number of retinal proteins showed significant PKCα-dependent phosphorylation, including BORG4 and TPBG, suggesting a potential contribution to PKCα-dependent modulation of RBC physiology.
Collapse
Affiliation(s)
- Colin M Wakeham
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, OR 97239, USA
| | - Phillip A Wilmarth
- Proteomics Shared Resource, Oregon Health and Science University, Portland, OR 97239, USA
| | - Jennifer M Cunliffe
- Proteomics Shared Resource, Oregon Health and Science University, Portland, OR 97239, USA
| | - John E Klimek
- Proteomics Shared Resource, Oregon Health and Science University, Portland, OR 97239, USA
| | - Gaoying Ren
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, OR 97239, USA
| | - Larry L David
- Proteomics Shared Resource, Oregon Health and Science University, Portland, OR 97239, USA; Department of Biochemistry and Molecular Biology, Oregon Health and Science University, Portland, OR 97239, USA
| | - Catherine W Morgans
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, OR 97239, USA.
| |
Collapse
|
33
|
Kho M, Shi H, Nie S. Cdc42 Effector Protein 3 Interacts With Cdc42 in Regulating Xenopus Somite Segmentation. Front Physiol 2019; 10:542. [PMID: 31133876 PMCID: PMC6514426 DOI: 10.3389/fphys.2019.00542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 04/17/2019] [Indexed: 11/15/2022] Open
Abstract
Somitogenesis is a critical process during vertebrate development that establishes the segmented body plan and gives rise to the vertebra, skeletal muscles, and dermis. While segmentation clock and wave front mechanisms have been elucidated to control the size and time of somite formation, regulation of the segmentation process that physically separates somites is not understood in detail. Here, we identified a cytoskeletal player, Cdc42 effector protein 3 (Cdc42ep3, CEP3) that is required for somite segmentation in Xenopus embryos. CEP3 is specifically expressed in somite tissue during somite segmentation. Loss-of-function experiments showed that CEP3 is not required for the specification of paraxial mesoderm, nor the differentiation of muscle cells, but is required for the segmentation process. Live imaging analysis further revealed that CEP3 is required for cell shape changes and alignment during somitogenesis. When CEP3 was knocked down, somitic cells did not elongate efficiently along the mediolateral axis and failed to undertake the 90° rotation. As a result, cells remained in a continuous sheet without an apparent segmentation cleft. CEP3 likely interacts with Cdc42 during this process, and both increased and decreased Cdc42 activity led to defective somite segmentation. Segmentation defects caused by Cdc42 knockdown can be partially rescued by the overexpression of CEP3. Conversely, loss of CEP3 resulted in the maintenance of high levels of Cdc42 activity at the cell membrane, which is normally reduced during and after somite segmentation. These results suggest that there is a feedback regulation between Cdc42 and CEP3 during somite segmentation and the activity of Cdc42 needs to be fine-tuned to control the coordinated cell shape changes and movement required for somite segmentation.
Collapse
Affiliation(s)
- Mary Kho
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States
| | - Hongyu Shi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States
| | - Shuyi Nie
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States.,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States.,Integrated Cancer Research Center, Georgia Institute of Technology, Atlanta, GA, United States
| |
Collapse
|
34
|
Septin filament coalignment with microtubules depends on SEPT9_i1 and tubulin polyglutamylation, and is an early feature of acquired cell resistance to paclitaxel. Cell Death Dis 2019; 10:54. [PMID: 30670682 PMCID: PMC6342940 DOI: 10.1038/s41419-019-1318-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/14/2018] [Accepted: 12/18/2018] [Indexed: 02/06/2023]
Abstract
Cancer cell resistance to taxanes is a complex, multifactorial process, which results from the combination of several molecular and cellular changes. In breast cancer cells adapted to long-term paclitaxel treatment, we previously identified a new adaptive mechanism that contributes to resistance and involves high levels of tubulin tyrosination and long-chain polyglutamylation coupled with high levels of septin expression, especially that of SEPT9_i1. This in turn led to higher CLIP-170 and MCAK recruitment to microtubules to enhance microtubule dynamics and therefore counteract the stabilizing effects of taxanes. Here, we explored to which extent this new mechanism alone could trigger taxane resistance. We show that coupling septins (including SEPT9_i1) overexpression together with long-chain tubulin polyglutamylation induce significant paclitaxel resistance in several naive (taxane-sensitive) cell lines and accordingly stimulate the binding of CLIP-170 and MCAK to microtubules. Strikingly, such resistance was paralleled by a systematic relocalization of septin filaments from actin fibers to microtubules. We further show that this relocalization resulted from the overexpression of septins in a context of enhanced tubulin polyglutamylation and reveal that it could also be promoted by an acute treatment with paclitaxel of sensitve cell displaying a high basal level of SEPT9_i1. These findings point out the functional importance and the complex cellular dynamics of septins in the onset of cell resistance to death caused by microtubule-targeting antimitotic drugs of the taxane family.
Collapse
|
35
|
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
|
36
|
Cohen S, Kovari DT, Wei W, Keate R, Curtis JE, Nie S. Cdc42 regulates the cellular localization of Cdc42ep1 in controlling neural crest cell migration. J Mol Cell Biol 2017; 10:376-387. [PMID: 29040749 PMCID: PMC6692865 DOI: 10.1093/jmcb/mjx044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 10/02/2017] [Indexed: 01/12/2023] Open
Abstract
The member of Rho family of small GTPases Cdc42 plays important and conserved roles in cell polarity and motility. The Cdc42ep family proteins have been identified to bind to Cdc42, yet how they interact with Cdc42 to regulate cell migration remains to be elucidated. In this study, we focus on Cdc42ep1, which is expressed predominantly in the highly migratory neural crest cells in frog embryos. Through morpholino-mediated knockdown, we show that Cdc42ep1 is required for the migration of cranial neural crest cells. Loss of Cdc42ep1 leads to rounder cell shapes and the formation of membrane blebs, consistent with the observed disruption in actin organization and focal adhesion alignment. As a result, Cdc42ep1 is critical for neural crest cells to apply traction forces at the correct place to migrate efficiently. We further show that Cdc42ep1 is localized to two areas in neural crest cells: in membrane protrusions together with Cdc42 and in perinuclear patches where Cdc42 is absent. Cdc42 directly interacts with Cdc42ep1 (through the CRIB domain) and changes in Cdc42 level shift the distribution of Cdc42ep1 between these two subcellular locations, controlling the formation of membrane protrusions and directionality of migration as a consequence. These results suggest that Cdc42ep1 elaborates Cdc42 activity in neural crest cells to promote their efficient migration.
Collapse
Affiliation(s)
- Shlomi Cohen
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA,School of Physics, Georgia Institute of Technology, Atlanta, GA, USA,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | | | - Wenbin Wei
- School of Physics, Georgia Institute of Technology, Atlanta, GA, USA,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Rebecca Keate
- School of Physics, Georgia Institute of Technology, Atlanta, GA, USA,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA,Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Jennifer E Curtis
- School of Physics, Georgia Institute of Technology, Atlanta, GA, USA,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Shuyi Nie
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA,Correspondence to: Shuyi Nie, E-mail:
| |
Collapse
|