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Czerwonka A, Kałafut J, Wang S, Anameric A, Przybyszewska-Podstawka A, Toriseva M, Nees M. The Notch inhibitor, FLI-06, increases the chemosensitivity of head and neck Squamous cell carcinoma cells to taxanes-based treatment. Biomed Pharmacother 2024; 177:116822. [PMID: 38906029 DOI: 10.1016/j.biopha.2024.116822] [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: 03/24/2024] [Revised: 05/21/2024] [Accepted: 05/26/2024] [Indexed: 06/23/2024] Open
Abstract
Aberration of Notch signaling is one of the key events involved in the development and progression of head and neck squamous cell carcinoma (HNSCC). The Notch pathway controls the tissue-specific differentiation of normal squamous epithelial cells and is frequently altered in squamous carcinomas, thus affecting their proliferation, growth, survival, and chemosensitivity or resistance against anti-cancer agents. In this study, we show that the use of novel, small-molecule inhibitors of Notch signaling, such as FLI-06, can have a beneficial effect on increasing the chemosensitivity of HNSCC to taxane-based chemotherapy. Inhibition of Notch signaling by FLI-06 alone virtually blocks the proliferation and growth of HNSCC cells in both 2D and 3D cultures and the zebrafish model, which is accompanied by down-regulation of key Notch target genes and proteins. Mechanistically, FLI-06 treatment causes cell cycle arrest in the G1-phase and induction of apoptosis in HNSCC, which is accompanied by increased c-JunS63 phosphorylation. Combining FLI-06 with Docetaxel shows a synergistic effect and partially blocks the cell growth of aggressive HNSCC cells via enhanced apoptosis and modification of c-JunS243 phosphorylation via GSK-3β inhibition. In conclusion, inhibition of Notch signaling in HNSCC cells that retain active Notch signaling significantly supports taxane-based anticancer activities via modulation of both the GSK-3β and the c-Jun.
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Affiliation(s)
- Arkadiusz Czerwonka
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin 20-093, Poland.
| | - Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin 20-093, Poland
| | - Shaoxia Wang
- Institute of Biomedicine, Cancer Research Unit and FICAN West Cancer Centre Laboratory, University of Turku and Turku University Hospital, Turku, Finland
| | - Alinda Anameric
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin 20-093, Poland
| | | | - Mervi Toriseva
- Institute of Biomedicine, Cancer Research Unit and FICAN West Cancer Centre Laboratory, University of Turku and Turku University Hospital, Turku, Finland
| | - Matthias Nees
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin 20-093, Poland
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2
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Czerwonka A, Kałafut J, Nees M. Modulation of Notch Signaling by Small-Molecular Compounds and Its Potential in Anticancer Studies. Cancers (Basel) 2023; 15:4563. [PMID: 37760535 PMCID: PMC10526229 DOI: 10.3390/cancers15184563] [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: 08/01/2023] [Revised: 09/03/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Notch signaling is responsible for conveying messages between cells through direct contact, playing a pivotal role in tissue development and homeostasis. The modulation of Notch-related processes, such as cell growth, differentiation, viability, and cell fate, offer opportunities to better understand and prevent disease progression, including cancer. Currently, research efforts are mainly focused on attempts to inhibit Notch signaling in tumors with strong oncogenic, gain-of-function (GoF) or hyperactivation of Notch signaling. The goal is to reduce the growth and proliferation of cancer cells, interfere with neo-angiogenesis, increase chemosensitivity, potentially target cancer stem cells, tumor dormancy, and invasion, and induce apoptosis. Attempts to pharmacologically enhance or restore disturbed Notch signaling for anticancer therapies are less frequent. However, in some cancer types, such as squamous cell carcinomas, preferentially, loss-of-function (LoF) mutations have been confirmed, and restoring but not blocking Notch functions may be beneficial for therapy. The modulation of Notch signaling can be performed at several key levels related to NOTCH receptor expression, translation, posttranslational (proteolytic) processing, glycosylation, transport, and activation. This further includes blocking the interaction with Notch-related nuclear DNA transcription. Examples of small-molecular chemical compounds, that modulate individual elements of Notch signaling at the mentioned levels, have been described in the recent literature.
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Affiliation(s)
- Arkadiusz Czerwonka
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (J.K.); (M.N.)
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3
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Contreras W, Bazan JF, Mentrup T. The transmembrane domain of Frey1 harbors a transplantable inhibitory motif for intramembrane proteases. Cell Mol Life Sci 2023; 80:170. [PMID: 37261541 DOI: 10.1007/s00018-023-04823-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 05/23/2023] [Accepted: 05/23/2023] [Indexed: 06/02/2023]
Abstract
Although aspartic intramembrane-cleaving proteases (I-CLIPs) are crucial switches of multiple signaling pathways and involved in several devastating diseases, little is known about their physiological regulation. We have recently identified Frey regulator of sperm-oocyte fusion 1 (Frey1) as an inhibitory protein of Signal Peptide Peptidase-like 2c (SPPL2c), a member of this protease family. Employing structure modeling along with cell-based inhibition and interaction studies, we identify a short motif within the Frey1 transmembrane domain essential for inhibition of SPPL2c. Intriguingly, this motif can be transplanted to the SPPL2c substrate PLN, thereby transforming it into an inhibitor of this enzyme. It can be adopted for the generation of Notch1-based γ-Secretase inhibitors demonstrating its versatile use among aspartic I-CLIPs. In summary, we describe a mechanism of aspartic I-CLIP inhibition which allows the targeted generation of specific inhibitors of these enzymes and might enable the identification of endogenous negative regulators of these enzymes.
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Affiliation(s)
- Whendy Contreras
- Institute of Physiological Chemistry, Technische Universität Dresden, Fiedlerstraße 42, 01307, Dresden, Germany
| | - J Fernando Bazan
- Unit for Structural Biology, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Torben Mentrup
- Institute of Physiological Chemistry, Technische Universität Dresden, Fiedlerstraße 42, 01307, Dresden, Germany.
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4
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Guo M, Niu Y, Xie M, Liu X, Li X. Notch signaling, hypoxia, and cancer. Front Oncol 2023; 13:1078768. [PMID: 36798826 PMCID: PMC9927648 DOI: 10.3389/fonc.2023.1078768] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/19/2023] [Indexed: 02/04/2023] Open
Abstract
Notch signaling is involved in cell fate determination and deregulated in human solid tumors. Hypoxia is an important feature in many solid tumors, which activates hypoxia-induced factors (HIFs) and their downstream targets to promote tumorigenesis and cancer development. Recently, HIFs have been shown to trigger the Notch signaling pathway in a variety of organisms and tissues. In this review, we focus on the pro- and anti-tumorigenic functions of Notch signaling and discuss the crosstalk between Notch signaling and cellular hypoxic response in cancer pathogenesis, including epithelia-mesenchymal transition, angiogenesis, and the maintenance of cancer stem cells. The pharmacological strategies targeting Notch signaling and hypoxia in cancer are also discussed in this review.
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Affiliation(s)
- Mingzhou Guo
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,Key Laboratory of Pulmonary Diseases of National Health Commission, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Yang Niu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,Key Laboratory of Pulmonary Diseases of National Health Commission, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Min Xie
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,Key Laboratory of Pulmonary Diseases of National Health Commission, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Xiansheng Liu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,Key Laboratory of Pulmonary Diseases of National Health Commission, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China
| | - Xiaochen Li
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,Key Laboratory of Pulmonary Diseases of National Health Commission, Tongji Hospital, Tongji Medical College, Huazhong University of Sciences and Technology, Wuhan, China,*Correspondence: Xiaochen Li,
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5
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Mancarella S, Gigante I, Serino G, Pizzuto E, Dituri F, Valentini MF, Wang J, Chen X, Armentano R, Calvisi DF, Giannelli G. Crenigacestat blocking notch pathway reduces liver fibrosis in the surrounding ecosystem of intrahepatic CCA viaTGF-β inhibition. J Exp Clin Cancer Res 2022; 41:331. [PMID: 36443822 PMCID: PMC9703776 DOI: 10.1186/s13046-022-02536-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 11/09/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Intrahepatic cholangiocarcinoma (iCCA) is a highly malignant tumor characterized by an intensive desmoplastic reaction due to the exaggerated presence of the extracellular (ECM) matrix components. Liver fibroblasts close to the tumor, activated by transforming growth factor (TGF)-β1 and expressing high levels of α-smooth muscle actin (α-SMA), become cancer-associated fibroblasts (CAFs). CAFs are deputed to produce and secrete ECM components and crosstalk with cancer cells favoring tumor progression and resistance to therapy. Overexpression of Notch signaling is implicated in CCA development and growth. The study aimed to determine the effectiveness of the Notch inhibitor, Crenigacestat, on the surrounding microenvironment of iCCA. METHODS We investigated Crenigacestat's effectiveness in a PDX model of iCCA and human primary culture of CAFs isolated from patients with iCCA. RESULTS In silico analysis of transcriptomic profiling from PDX iCCA tissues treated with Crenigacestat highlighted "liver fibrosis" as one of the most modulated pathways. In the iCCA PDX model, Crenigacestat treatment significantly (p < 0.001) reduced peritumoral liver fibrosis. Similar results were obtained in a hydrodynamic model of iCCA. Bioinformatic prediction of the upstream regulators related to liver fibrosis in the iCCA PDX treated with Crenigacestat revealed the involvement of the TGF-β1 pathway as a master regulator gene showing a robust connection between TGF-β1 and Notch pathways. Consistently, drug treatment significantly (p < 0.05) reduced TGF-β1 mRNA and protein levels in tumoral tissue. In PDX tissues, Crenigacestat remarkably inhibited TGF-β signaling and extracellular matrix protein gene expression and reduced α-SMA expression. Furthermore, Crenigacestat synergistically increased Gemcitabine effectiveness in the iCCA PDX model. In 31 iCCA patients, TGF-β1 and α-SMA were upregulated in the tumoral compared with peritumoral tissues. In freshly isolated CAFs from patients with iCCA, Crenigacestat significantly (p < 0.001) inhibited Notch signaling, TGF-β1 secretion, and Smad-2 activation. Consequently, Crenigacestat also inactivated CAFs reducing (p < 0.001) α-SMA expression. Finally, CAFs treated with Crenigacestat produced less (p < 005) ECM components such as fibronectin, collagen 1A1, and collagen 1A2. CONCLUSIONS Notch signaling inhibition reduces the peritumoral desmoplastic reaction in iCCA, blocking the TGF-β1 canonical pathway.
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Affiliation(s)
- Serena Mancarella
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
| | - Isabella Gigante
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
| | - Grazia Serino
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
| | - Elena Pizzuto
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
| | - Francesco Dituri
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
| | - Maria F. Valentini
- grid.7644.10000 0001 0120 3326Department of Emergency and Organ Transplant, University of Bari Medical School, Bari, Italy
| | - Jingxiao Wang
- grid.266102.10000 0001 2297 6811Department of Bioengineering and Therapeutic Sciences and Liver Center, University of California, San Francisco, CA 94143 USA
| | - Xin Chen
- grid.266102.10000 0001 2297 6811Department of Bioengineering and Therapeutic Sciences and Liver Center, University of California, San Francisco, CA 94143 USA
| | - Raffaele Armentano
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
| | - Diego F. Calvisi
- grid.7727.50000 0001 2190 5763Institute of Pathology, University of Regensburg, 93053 Regensburg, Germany
| | - Gianluigi Giannelli
- grid.489101.50000 0001 0162 6994National Institute of Gastroenterology “S. De Bellis” Research Hospital, Via Turi 27, 70013 Castellana Grotte, BA Italy
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6
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Yin X, Zhou M, Zhang L, Fu Y, Xu M, Wang X, Cui Z, Gao Z, Li M, Dong Y, Feng H, Ma S, Chen C. Histone chaperone ASF1A accelerates chronic myeloid leukemia blast crisis by activating Notch signaling. Cell Death Dis 2022; 13:842. [PMID: 36184659 PMCID: PMC9527247 DOI: 10.1038/s41419-022-05234-5] [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: 05/05/2022] [Revised: 08/29/2022] [Accepted: 09/05/2022] [Indexed: 11/30/2022]
Abstract
The blast crisis (BC) is the final deadly phase of chronic myeloid leukemia (CML), which remains a major challenge in clinical management. However, the underlying molecular mechanism driving blastic transformation remains unclear. Here, we show that ASF1A, an essential activator, enhanced the transformation to CML-BC by mediating cell differentiation arrest. ASF1A expression was aberrantly increased in bone marrow samples from CML-BC patients compared with newly diagnosed CML-chronic phase (CP) patients. ASF1A inhibited cell differentiation and promoted CML development in vivo. Mechanistically, we identified ASF1A as a coactivator of the Notch transcriptional complex that induces H3K56ac modification in the promoter regions of Notch target genes, and subsequently enhanced RBPJ binding to these promoter regions, thereby enhancing Notch signaling activation to mediate differentiation arrest in CML cells. Thus, our work suggests that targeting ASF1A might represent a promising therapeutic approach and a biomarker to detect disease progression in CML patients.
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Affiliation(s)
- Xiaolin Yin
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Minran Zhou
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Lu Zhang
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Yue Fu
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China ,grid.27255.370000 0004 1761 1174Department of Physiology & Pathophysiology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong China
| | - Man Xu
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Xiaoming Wang
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Zelong Cui
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Zhenxing Gao
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Miao Li
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Yuting Dong
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Huimin Feng
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Sai Ma
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
| | - Chunyan Chen
- grid.27255.370000 0004 1761 1174Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong China
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Reynolds SD, Hill CL, Alsudayri A, Lallier SW, Wijeratne S, Tan ZH, Chiang T, Cormet-Boyaka E. Assemblies of JAG1 and JAG2 determine tracheobronchial cell fate in mucosecretory lung disease. JCI Insight 2022; 7:e157380. [PMID: 35819850 PMCID: PMC9462471 DOI: 10.1172/jci.insight.157380] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 07/06/2022] [Indexed: 11/17/2022] Open
Abstract
Mucosecretory lung disease compromises airway epithelial function and is characterized by goblet cell hyperplasia and ciliated cell hypoplasia. Goblet and ciliated cell types are derived from tracheobronchial stem/progenitor cells via a Notch-dependent mechanism. Although specific arrays of Notch receptors regulate cell fate determination, the function of the ligands Jagged1 (JAG1) and JAG2 is unclear. This study examined JAG1 and JAG2 function using human air-liquid-interface cultures that were treated with γ-secretase complex (GSC) inhibitors, neutralizing peptides/antibodies, or WNT/β-catenin pathway antagonists/agonists. These experiments revealed that JAG1 and JAG2 regulated cell fate determination in the tracheobronchial epithelium; however, their roles did not adhere to simple necessity and sufficiency rules. Biochemical studies indicated that JAG1 and JAG2 underwent posttranslational modifications that resulted in generation of a JAG1 C-terminal peptide and regulated the abundance of full-length JAG2 on the cell surface. GSC and glycogen synthase kinase 3 were implicated in these posttranslational events, but WNT agonist/antagonist studies and RNA-Seq indicated a WNT-independent mechanism. Collectively, these data suggest that posttranslational modifications create distinct assemblies of JAG1 and JAG2, which regulate Notch signal strength and determine the fate of tracheobronchial stem/progenitor cells.
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Affiliation(s)
| | | | | | | | | | - Zheng Hong Tan
- Center for Regenerative Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
| | - Tendy Chiang
- Center for Regenerative Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
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8
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Ojha R, Tantray I, Rimal S, Mitra S, Cheshier S, Lu B. Regulation of reverse electron transfer at mitochondrial complex I by unconventional Notch action in cancer stem cells. Dev Cell 2022; 57:260-276.e9. [PMID: 35077680 PMCID: PMC8852348 DOI: 10.1016/j.devcel.2021.12.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 10/06/2021] [Accepted: 12/21/2021] [Indexed: 01/26/2023]
Abstract
Metabolic flexibility is a hallmark of many cancers where mitochondrial respiration is critically involved, but the molecular underpinning of mitochondrial control of cancer metabolic reprogramming is poorly understood. Here, we show that reverse electron transfer (RET) through respiratory chain complex I (RC-I) is particularly active in brain cancer stem cells (CSCs). Although RET generates ROS, NAD+/NADH ratio turns out to be key in mediating RET effect on CSC proliferation, in part through the NAD+-dependent Sirtuin. Mechanistically, Notch acts in an unconventional manner to regulate RET by interacting with specific RC-I proteins containing electron-transporting Fe-S clusters and NAD(H)-binding sites. Genetic and pharmacological interference of Notch-mediated RET inhibited CSC growth in Drosophila brain tumor and mouse glioblastoma multiforme (GBM) models. Our results identify Notch as a regulator of RET and RET-induced NAD+/NADH balance, a critical mechanism of metabolic reprogramming and a metabolic vulnerability of cancer that may be exploited for therapeutic purposes.
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Affiliation(s)
- Rani Ojha
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA,These authors contributed equally
| | - Ishaq Tantray
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA,These authors contributed equally
| | - Suman Rimal
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Siddhartha Mitra
- Stem Cell Institute and Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA,Department of Pediatrics, Division of Hematology/Oncology/Bone Marrow Transplant, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Sam Cheshier
- Stem Cell Institute and Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA,Department of Neurosurgery, Division of Pediatric Neurosurgery, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Bingwei Lu
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA,Cancer Biology Program, Stanford University School of Medicine, Stanford, CA, USA,Lead Contact,Correspondence:
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9
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Identification of a dihydropyridine scaffold that blocks ryanodine receptors. iScience 2022; 25:103706. [PMID: 35059610 PMCID: PMC8760560 DOI: 10.1016/j.isci.2021.103706] [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: 09/09/2021] [Revised: 11/16/2021] [Accepted: 12/23/2021] [Indexed: 12/24/2022] Open
Abstract
Ryanodine receptors (RyRs) are large, intracellular ion channels that control Ca2+ release from the sarco/endoplasmic reticulum. Dysregulation of RyRs in skeletal muscle, heart, and brain has been implicated in various muscle pathologies, arrhythmia, heart failure, and Alzheimer's disease. Therefore, there is considerable interest in therapeutically targeting RyRs to normalize Ca2+ homeostasis in scenarios involving RyR dysfunction. Here, a simple invertebrate screening platform was used to discover new chemotypes targeting RyRs. The approach measured Ca2+ signals evoked by cyclic adenosine 5′-diphosphate ribose, a second messenger that sensitizes RyRs. From a 1,534-compound screen, FLI-06 (currently described as a Notch “inhibitor”) was identified as a potent blocker of RyR activity. Two closely related tyrosine kinase inhibitors that stimulate and inhibit Ca2+ release through RyRs were also resolved. Therefore, this simple screen yielded RyR scaffolds tractable for development and revealed an unexpected linkage between RyRs and trafficking events in the early secretory pathway. FLI-06 inhibits transport in the secretory pathway via an unknown mechanism An invertebrate screening platform revealed FLI-06 blocks intracellular Ca2+ release FLI-06 acts as a potent, cell-permeable ryanodine receptor (RyR) blocker The para-substituted dihydropyridine chemotype is a new scaffold for RyR modulation
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10
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Qiu L, Yang X, Wu J, Huang C, Miao Y, Fu Z. HIST2H2BF Potentiates the Propagation of Cancer Stem Cells via Notch Signaling to Promote Malignancy and Liver Metastasis in Colorectal Carcinoma. Front Oncol 2021; 11:677646. [PMID: 34476209 PMCID: PMC8406628 DOI: 10.3389/fonc.2021.677646] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/18/2021] [Indexed: 11/17/2022] Open
Abstract
Background Growing evidence demonstrates that the initiation and progression of colorectal carcinoma (CRC) is related to the presence of cancer stem cells (CSCs). However, the mechanism through which the stem cell features of CRC cells are maintained is poorly understood. In this study, we identified the oncogenic histone cluster 2 H2B family member F (HIST2H2BF) and aimed to investigate the function of upregulated HIST2H2BF expression in maintaining the stem cell features of CRC cells, which accelerate the progression of CRC. Methods HIST2H2BF expression was quantified using real-time polymerase chain reaction, immunohistochemistry, and western blotting. The correlation between CpG island methylation status and HIST2H2BF re-expression was assessed through bisulfite sequencing polymerase chain reaction, methylation-specific polymerase chain reaction, and 5-Aza-dC treatment. Functional assays were performed on CRC cells and mice to investigate the HIST2H2BF-induced stem cell-like and cancer properties of CRC. Using the Notch pathway inhibitor FLI-06, the regulatory effect of HIST2H2BF on downstream Notch signaling was confirmed. Results HIST2H2BF was highly expressed in CRC tissues and cell lines. The reactivation of HIST2H2BF in CRC stems at least in part from the hypomethylated CpG islands. CRC patients with high HIST2H2BF expression have poor survival outcomes. Functional studies have shown that HIST2H2BF promotes CSC phenotype, malignancy, and liver metastasis through the activation of Notch signaling in CRC. Blockage of the Notch pathway reduced the stem cell-like and cancer properties. Conclusion Our study suggests that HIST2H2BF upregulation enhances the CSC phenotype, malignancy, and liver metastasis through the activation of Notch signaling in CRC. These results identified a new perspective on the mechanism by which the stem cell features of CRC cells are maintained and highlighted the potential novel therapeutic targets for CRC.
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Affiliation(s)
- Lei Qiu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of General Surgery, The Second People's Hospital of Lianyungang, Lianyungang Tumor Hospital, Lianyungang Hospital Affiliated to Bengbu Medical University, Lianyungang, China
| | - Xiuwei Yang
- Department of General Surgery, The Second People's Hospital of Lianyungang, Lianyungang Tumor Hospital, Lianyungang Hospital Affiliated to Bengbu Medical University, Lianyungang, China
| | - Jingyu Wu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Changzhi Huang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yongchang Miao
- Department of General Surgery, The Second People's Hospital of Lianyungang, Lianyungang Tumor Hospital, Lianyungang Hospital Affiliated to Bengbu Medical University, Lianyungang, China
| | - Zan Fu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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11
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Li Y, Xu Y, Wang R, Li W, He W, Luo X, Ye Y. Expression of Notch-Hif-1α signaling pathway in liver regeneration of rats. J Int Med Res 2021; 48:300060520943790. [PMID: 32967512 PMCID: PMC7521060 DOI: 10.1177/0300060520943790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Objective To investigate whether the Notch–Hif-1α signaling pathway is involved in liver regeneration. Methods Rats were divided into two groups and treated with daily intraperitoneal injections of saline (control) or the gamma-secretase inhibitor, Fli-06, for 2 days. Two-thirds of the rat livers were resected and rats were later euthanized at specific time points post-resection to analyze the remnant livers. Each group's liver/body weight ratio was calculated, and immunostaining and western blotting were used to determine the cell proliferation marker, PCNA and Ki-67 expression. Real-time PCR and western blotting were used to compare the mRNA expression of Notch homolog-1 (Notch1), hairy and enhancer of split-1 (Hes1), and vascular endothelial growth factor (Vegf), and the protein expression of NICD and HIF-1α, respectively. Results The liver/body weight ratios and number of Ki-67- and PCNA-positive cells were significantly lower in the experimental group than the control group, indicating lower levels of liver regeneration following the disruption of Notch signaling by Fli-06. The Hes1 and Vegf mRNA levels and NICD and HIF-1α protein expression levels were all down-regulated by Fli-06 treatment. Conclusion Notch–Hif-α signaling pathway activation plays an important role in liver regeneration, where it may contribute toward liver cell proliferation.
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Affiliation(s)
- Yanshan Li
- Department of Blood Transfusion, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yunxiuxiu Xu
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ruomei Wang
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenxin Li
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenguang He
- Department of General Surgery, Zengcheng People's Hospital, Zengcheng, China
| | - Xinxi Luo
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Gastrointestinal Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yibiao Ye
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
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12
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Wei R, Sugiyama A, Sato Y, Nozumi M, Nishino H, Takahashi M, Saito T, Ando K, Fukuda M, Tomomura M, Igarashi M, Hisanaga SI. Isoform-dependent subcellular localization of LMTK1A and LMTK1B and their roles in axon outgrowth and spine formation. J Biochem 2021; 168:23-32. [PMID: 32044995 DOI: 10.1093/jb/mvaa019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 01/29/2020] [Indexed: 12/13/2022] Open
Abstract
Lemur kinase 1 (LMTK1) is a membrane-bound Ser/Thr kinase that is expressed in neurons. There are two splicing variants of LMTK1 with different membrane binding modes, viz., cytosolic LMTK1A that binds to membranes through palmitoylation at the N-terminal cysteines and LMTK1B, an integral membrane protein with transmembrane sequences. We recently reported that LMTK1A regulates axon outgrowth and spine formation in neurons. However, data about LMTK1B are scarce. We analysed the expression and cellular localization of LMTK1B along with its role in axon and spine formation. We found that both LMTK1B and LMTK1A were expressed equally in the cerebral cortex and cerebellum of the mouse brain. Similar to LMTK1A, the wild type of LMTK1B was localized to Rab11-positive pericentrosomal compartment. The kinase negative (kn) mutant of LMTK1B was found to be associated with an increase in the tubular form of endoplasmic reticulum (ER), which was not the case with LMTK1A kn. Furthermore, unlike LMTK1A kn, LMTK1B kn did not stimulate the axon outgrowth and spine formation. These results suggest that while LMTK1A and LMTK1B share a common function in recycling endosomal trafficking at the pericentrosomal compartment, LMTK1B has an additional unique function in vesicle transport in the ER region.
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Affiliation(s)
- Ran Wei
- Department of Biological Sciences, Faculty of Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Arika Sugiyama
- Department of Biological Sciences, Faculty of Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Yuta Sato
- Department of Neurochemistry and Molecular Cell Biology, Graduate School of Medical and Dental Sciences, Niigata University, Asahimachi, Chuo-ku, Niigata 951-8510, Japan
| | - Motohiro Nozumi
- Department of Neurochemistry and Molecular Cell Biology, Graduate School of Medical and Dental Sciences, Niigata University, Asahimachi, Chuo-ku, Niigata 951-8510, Japan
| | - Hironori Nishino
- Department of Biological Sciences, Faculty of Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Miyuki Takahashi
- Miyuki Takahashi, Department of Life Science and Medical Bioscience, Laboratory for Molecular Brain Science, Waseda University, Tokyo 162-8480
| | - Taro Saito
- Department of Biological Sciences, Faculty of Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Kanae Ando
- Department of Biological Sciences, Faculty of Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Mitsunori Fukuda
- Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Mineko Tomomura
- Department of Oral Health Sciences, Meikai University School of Health Sciences, Urayasu, Chiba 279-9950, Japan
| | - Michihiro Igarashi
- Department of Neurochemistry and Molecular Cell Biology, Graduate School of Medical and Dental Sciences, Niigata University, Asahimachi, Chuo-ku, Niigata 951-8510, Japan
| | - Shin-Ichi Hisanaga
- Department of Biological Sciences, Faculty of Sciences, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
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13
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Chen DD, Wang HW, Cai XJ. Transcription factor Sp1 ameliorates sepsis-induced myocardial injury via ZFAS1/Notch signaling in H9C2 cells. Cytokine 2021; 140:155426. [PMID: 33517197 DOI: 10.1016/j.cyto.2021.155426] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/24/2020] [Accepted: 01/06/2021] [Indexed: 12/11/2022]
Abstract
PURPOSE To investigate whether Sp1 can ameliorate sepsis-induced myocardial injury and explore the potential molecular mechanism. METHODS The embryonic cardiomyocyte cell line H9C2 and primary cultured mouse neonatal cardiomyocytes (CMNCs) were treated with LPS or phosphate-buffered saline (PBS). A mouse model of LPS-induced sepsis was established using male C57BL/6J mice and their cardiomyocytes were collected. Real-time reverse transcription-PCR (qRT-PCR) assay was used to detect the expression levels of Sp1 and ZFAS1 in cardiomyocytes. Western blotting analysis was used to assess the protein expression levels of Sp1, apoptosis-associated proteins and Notch signaling pathway related proteins. Luciferase assay was used to detect the interaction between Sp1 and ZFAS1. Cell transfection was used to generate H9C2 cells with overexpressed or knocked down of Sp1 or ZFAS1. MTT assay and flow cytometry analysis were used to test the cell proliferation and cell apoptosis ratio. RESULTS Our data revealed that the expressions of ZFAS1 and Sp1 were significantly reduced in LPS-treated H9C2 cells and primary CMNCs. The downregulation of ZFAS1 and Sp1 were also found in cardiomyocytes obtained from LPS-challenged mice. LPS induced H9C2 cell apoptosis and depressed cell proliferation was ameliorated by ZFAS1 overexpression and aggravated by ZFAS1 knockdown. Mechanistically, Luciferase assay indicated that Sp1 could bind to ZFAS1, and positively regulated ZFAS1 expression. Moreover, Notch signaling pathway participates in H9C2 cell apoptosis mediated by Sp1. CONCLUSION The present study demonstrates that Sp1 regulates LPS-induced cardiomyocyte apoptosis via ZFAS1/Notch signaling pathway, which may serve as therapeutic targets for sepsis-induced myocardial injury.
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Affiliation(s)
- Dan-Dan Chen
- Department of Critical Care Medicine, Haikou Hospital, Xiangya Medical College, Central South University, Haikou 570208, PR China
| | - Hong-Wu Wang
- Department of Critical Care Medicine, Haikou Hospital, Xiangya Medical College, Central South University, Haikou 570208, PR China
| | - Xing-Jun Cai
- Department of Respiratory and Critical Care Medicine, Hainan General Hospital, Haikou 570311, PR China.
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14
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Context Matters: NOTCH Signatures and Pathway in Cancer Progression and Metastasis. Cells 2021; 10:cells10010094. [PMID: 33430387 PMCID: PMC7827494 DOI: 10.3390/cells10010094] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 02/06/2023] Open
Abstract
The Notch signaling pathway is a critical player in embryogenesis but also plays various roles in tumorigenesis, with both tumor suppressor and oncogenic activities. Mutations, deletions, amplifications, or over-expression of Notch receptors, ligands, and a growing list of downstream Notch-activated genes have by now been described for most human cancer types. Yet, it often remains unclear what may be the functional impact of these changes for tumor biology, initiation, and progression, for cancer therapy, and for personalized medicine. Emerging data indicate that Notch signaling can also contribute to increased aggressive properties such as invasion, tumor heterogeneity, angiogenesis, or tumor cell dormancy within solid cancer tissues; especially in epithelial cancers, which are in the center of this review. Notch further supports the “stemness” of cancer cells and helps define the stem cell niche for their long-term survival, by integrating the interaction between cancer cells and the cells of the tumor microenvironment (TME). The complexity of Notch crosstalk with other signaling pathways and its roles in cell fate and trans-differentiation processes such as epithelial-to-mesenchymal transition (EMT) point to this pathway as a decisive player that may tip the balance between tumor suppression and promotion, differentiation and invasion. Here we not only review the literature, but also explore genomic databases with a specific focus on Notch signatures, and how they relate to different stages in tumor development. Altered Notch signaling hereby plays a key role for tumor cell survival and coping with a broad spectrum of vital issues, contributing to failed therapies, poor patient outcome, and loss of lives.
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Abstract
Head and neck cancer is a group of neoplastic diseases affecting the facial, oral, and neck region. It is one of the most common cancers worldwide with an aggressive, invasive evolution. Due to the heterogeneity of the tissues affected, it is particularly challenging to study the molecular mechanisms at the basis of these tumors, and to date we are still lacking accurate targets for prevention and therapy. The Notch signaling is involved in a variety of tumorigenic mechanisms, such as regulation of the tumor microenvironment, aberrant intercellular communication, and altered metabolism. Here, we provide an up-to-date review of the role of Notch in head and neck cancer and draw parallels with other types of solid tumors where the Notch pathway plays a crucial role in emergence, maintenance, and progression of the disease. We therefore give a perspective view on the importance of the pathway in neoplastic development in order to define future lines of research and novel therapeutic approaches.
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16
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Stengel ST, Fazio A, Lipinski S, Jahn MT, Aden K, Ito G, Wottawa F, Kuiper JW, Coleman OI, Tran F, Bordoni D, Bernardes JP, Jentzsch M, Luzius A, Bierwirth S, Messner B, Henning A, Welz L, Kakavand N, Falk-Paulsen M, Imm S, Hinrichsen F, Zilbauer M, Schreiber S, Kaser A, Blumberg R, Haller D, Rosenstiel P. Activating Transcription Factor 6 Mediates Inflammatory Signals in Intestinal Epithelial Cells Upon Endoplasmic Reticulum Stress. Gastroenterology 2020; 159:1357-1374.e10. [PMID: 32673694 PMCID: PMC7923714 DOI: 10.1053/j.gastro.2020.06.088] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 05/18/2020] [Accepted: 06/18/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Excess and unresolved endoplasmic reticulum (ER) stress in intestinal epithelial cells (IECs) promotes intestinal inflammation. Activating transcription factor 6 (ATF6) is one of the signaling mediators of ER stress. We studied the pathways that regulate ATF6 and its role for inflammation in IECs. METHODS We performed an RNA interference screen, using 23,349 unique small interfering RNAs targeting 7783 genes and a luciferase reporter controlled by an ATF6-dependent ERSE (ER stress-response element) promoter, to identify proteins that activate or inhibit the ATF6 signaling pathway in HEK293 cells. To validate the screening results, intestinal epithelial cell lines (Caco-2 cells) were transfected with small interfering RNAs or with a plasmid overexpressing a constitutively active form of ATF6. Caco-2 cells with a CRISPR-mediated disruption of autophagy related 16 like 1 gene (ATG16L1) were used to study the effect of ATF6 on ER stress in autophagy-deficient cells. We also studied intestinal organoids derived from mice that overexpress constitutively active ATF6, from mice with deletion of the autophagy related 16 like 1 or X-Box binding protein 1 gene in IECs (Atg16l1ΔIEC or Xbp1ΔIEC, which both develop spontaneous ileitis), from patients with Crohn's disease (CD) and healthy individuals (controls). Cells and organoids were incubated with tunicamycin to induce ER stress and/or chemical inhibitors of newly identified activator proteins of ATF6 signaling, and analyzed by real-time polymerase chain reaction and immunoblots. Atg16l1ΔIEC and control (Atg16l1fl/fl) mice were given intraperitoneal injections of tunicamycin and were treated with chemical inhibitors of ATF6 activating proteins. RESULTS We identified and validated 15 suppressors and 7 activators of the ATF6 signaling pathway; activators included the regulatory subunit of casein kinase 2 (CSNK2B) and acyl-CoA synthetase long chain family member 1 (ACSL1). Knockdown or chemical inhibition of CSNK2B and ACSL1 in Caco-2 cells reduced activity of the ATF6-dependent ERSE reporter gene, diminished transcription of the ATF6 target genes HSP90B1 and HSPA5 and reduced NF-κB reporter gene activation on tunicamycin stimulation. Atg16l1ΔIEC and or Xbp1ΔIEC organoids showed increased expression of ATF6 and its target genes. Inhibitors of ACSL1 or CSNK2B prevented activation of ATF6 and reduced CXCL1 and tumor necrosis factor (TNF) expression in these organoids on induction of ER stress with tunicamycin. Injection of mice with inhibitors of ACSL1 or CSNK2B significantly reduced tunicamycin-mediated intestinal inflammation and IEC death and expression of CXCL1 and TNF in Atg16l1ΔIEC mice. Purified ileal IECs from patients with CD had higher levels of ATF6, CSNK2B, and HSPA5 messenger RNAs than controls; early-passage organoids from patients with active CD show increased levels of activated ATF6 protein, incubation of these organoids with inhibitors of ACSL1 or CSNK2B reduced transcription of ATF6 target genes, including TNF. CONCLUSIONS Ileal IECs from patients with CD have higher levels of activated ATF6, which is regulated by CSNK2B and HSPA5. ATF6 increases expression of TNF and other inflammatory cytokines in response to ER stress in these cells and in organoids from Atg16l1ΔIEC and Xbp1ΔIEC mice. Strategies to inhibit the ATF6 signaling pathway might be developed for treatment of inflammatory bowel diseases.
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Affiliation(s)
- Stephanie T. Stengel
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Antonella Fazio
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Simone Lipinski
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Martin T. Jahn
- RD3 Marine Microbiology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany
| | - Konrad Aden
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany,Department of Internal Medicine I., Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Go Ito
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany,Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Felix Wottawa
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Jan W.P. Kuiper
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Olivia I. Coleman
- Chair of Nutrition and Immunology, Technische Universität München, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Florian Tran
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany,Department of Internal Medicine I., Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Dora Bordoni
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Joana P. Bernardes
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Marlene Jentzsch
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Anne Luzius
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Sandra Bierwirth
- Chair of Nutrition and Immunology, Technische Universität München, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Berith Messner
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Anna Henning
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Lina Welz
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Nassim Kakavand
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Maren Falk-Paulsen
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Simon Imm
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Finn Hinrichsen
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Matthias Zilbauer
- Department of Pediatrics, University of Cambridge, Addenbrooke’s Hospital, Cambridge CB2 0QQ, England, UK MA
| | - Stefan Schreiber
- Department of Internal Medicine I., Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Arthur Kaser
- Division of Gastroenterology and Hepatology, Department of Medicine, Addenbrooke’s Hospital, University of Cambridge, Cambridge CB2 0QQ, England, UK MA
| | - Richard Blumberg
- Gastroenterology Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, US
| | - Dirk Haller
- Chair of Nutrition and Immunology, Technische Universität München, Gregor-Mendel-Str. 2, 85354 Freising, Germany
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Christian-Albrechts-University and University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany.
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He Y, Xu L, Feng J, Wu K, Zhao Y, Huang H. HDAC Inhibitor LBH589 Suppresses the Proliferation but Enhances the Antileukemic Effect of Human γδT Cells. MOLECULAR THERAPY-ONCOLYTICS 2020; 18:623-630. [PMID: 33005729 PMCID: PMC7515977 DOI: 10.1016/j.omto.2020.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 08/06/2020] [Indexed: 12/17/2022]
Abstract
γδT cells have potent effects on hematological malignancies, and their functions can be regulated by anti-tumor agents. Histone deacetylase inhibitors (HDACis) not only have antileukemic activity on leukemia but also affect immune cells during therapeutic application. In this in vitro study, we showed that LBH589, a pan-HDACi, impaired the proliferation of human γδT cells, as well as their proportions in peripheral blood mononuclear cells (PBMCs). At the specific concentration, LBH589 induced significant antileukemic activity of γδT cells against the HL-60 cells and Kasumi cells in a dose-dependent manner. However, the expression levels of activating receptor and molecules, as well as interferon-γ (IFN-γ) expression on γδT cells, were not affected by LBH589. After treatment with LBH589 for indicated times, extracellular-regulated protein kinase (ERK), Akt, and c-Jun N-terminal kinase (JNK) signaling pathways in γδT cells were not activated. In contrast, a stronger expression of Notch was observed and sustained for 72 h. Inhibition of Notch signaling by FLI-06, the γ-secretase inhibitor, significantly reversed the enhanced antileukemic ability of γδT cells induced by LBH589. For the first time, our investigations demonstrate that LBH589 can inhibit proliferation of γδT cells but facilitate their antileukemic effects via activation of Notch signaling.
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Affiliation(s)
- Ying He
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China
- Zhejiang Provincial People’s Hospital, 158 Shangtang Road, Hangzhou, Zhejiang 310014, China
- Institute of Hematology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Lin Xu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China
- Institute of Hematology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Jingjing Feng
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China
- Institute of Hematology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Kangni Wu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China
- Institute of Hematology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Yanmin Zhao
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China
- Institute of Hematology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Corresponding author: Yanmin Zhao, Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China.
| | - He Huang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China
- Institute of Hematology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
- Corresponding author: He Huang, Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou 310003, China.
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Shearer C, Desaunay O, Zorc S, Richaud AD, Samanta SS, Jeedimalla N, Roche SP. Intercepted-Knoevenagel condensation for the synthesis of unsymmetrical fused-tricyclic 4 H-pyrans. Tetrahedron 2019; 75. [PMID: 31741543 DOI: 10.1016/j.tet.2019.130606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
4H-Pyrans (4H-Pys) and 1,4-dihydropyridines (1,4-DHPs) are important classes of heterocyclic scaffolds in medicinal chemistry. Herein, an indium(III)-catalyzed one-pot domino reaction for the synthesis of highly functionalized 4H-Pys, and a model of 1,4-DHP is reported. This alternative approach to the challenging Hantzsch 4-component reaction enables the synthesis of fused-tricyclic heterocycles, and the mechanistic studies underline the importance of an intercepted-Knoevenagel adduct to achieve higher chemoselectivity towards these types of unsymmetrical heterocycles.
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Affiliation(s)
- Charles Shearer
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Oriane Desaunay
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Stephen Zorc
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Alexis D Richaud
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Shyam S Samanta
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Nagalakshmi Jeedimalla
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Stéphane P Roche
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
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19
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Gan RH, Lin LS, Xie J, Huang L, Ding LC, Su BH, Peng XE, Zheng DL, Lu YG. FLI-06 Intercepts Notch Signaling And Suppresses The Proliferation And Self-renewal Of Tongue Cancer Cells. Onco Targets Ther 2019; 12:7663-7674. [PMID: 31571917 PMCID: PMC6756372 DOI: 10.2147/ott.s221231] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 08/29/2019] [Indexed: 01/18/2023] Open
Abstract
Purpose The Notch signaling pathway plays an oncogenic role in tongue squamous cell carcinoma. The aim of this study was to inhibit the proliferation and self-renewal of tongue cancer cells by applying Notch signaling pathway inhibitor FLI-06 (Selleck, USA) and to lay a foundation for the clinically targeted treatment of tongue cancer for the future. Methods The mRNA expression level of Notch1 and the overall survival rate of patients with tongue cancer were examined by analyzing the TCGA database. Tongue cancer cells were treated with FLI-06. Cell proliferation, apoptosis, and stem cell self-renewal ability were tested in appropriate ways. A xenograft mouse model was established to observe tumor growth. Results From the TCGA data, we demonstrated that patients with high expression of Notch1 had a poor prognosis. We observed that the Notch signaling pathway inhibitor FLI-06 can restrain the activation of the Notch signaling pathway, decrease cell proliferation and induce cell apoptosis in vitro. The xenograft experiment indicated that intraperitoneal injection of FLI-06 inhibited tumor growth and increased cell apoptosis. FLI-06 suppressed both the mRNA and protein expression of Notch receptor and Notch targeted genes. We also observed that FLI-06 suppressed the proliferation of tongue cancer stem cells. Conclusion FLI-06 can block the proliferation and self-renewal of tongue cancer cells. It is inferred that this compound, which inhibits the Notch signaling pathway, may serve as a potential targeted drug for the treatment of tongue cancer in the clinic.
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Affiliation(s)
- Rui-Huan Gan
- Department of Epidemiology and Health Statistics, Fujian Provincial Key Laboratory of Environment Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, People's Republic of China
| | - Li-Song Lin
- Department of Oral and Maxillofacial Surgery, Affiliated First Hospital of Fujian Medical University, Fuzhou 350005, People's Republic of China
| | - Jing Xie
- Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350000, People's Republic of China.,Key Laboratory of Stomatology of Fujian Province, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350004, People's Republic of China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350122, People's Republic of China
| | - Li Huang
- Department of Oral and Maxillofacial Surgery, Affiliated First Hospital of Fujian Medical University, Fuzhou 350005, People's Republic of China.,Key Laboratory of Stomatology of Fujian Province, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350004, People's Republic of China
| | - Lin-Can Ding
- Department of Oral and Maxillofacial Surgery, Affiliated First Hospital of Fujian Medical University, Fuzhou 350005, People's Republic of China
| | - Bo-Hua Su
- Department of Oral and Maxillofacial Surgery, Affiliated First Hospital of Fujian Medical University, Fuzhou 350005, People's Republic of China
| | - Xian-E Peng
- Department of Epidemiology and Health Statistics, Fujian Provincial Key Laboratory of Environment Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, People's Republic of China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350122, People's Republic of China
| | - Da-Li Zheng
- Key Laboratory of Stomatology of Fujian Province, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350004, People's Republic of China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou 350122, People's Republic of China
| | - You-Guang Lu
- Department of Epidemiology and Health Statistics, Fujian Provincial Key Laboratory of Environment Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, People's Republic of China.,Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350000, People's Republic of China
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20
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Ali MA, Vuree S, Goud H, Hussain T, Nayarisseri A, Singh SK. Identification of High-affinity Small Molecules Targeting Gamma Secretase for the Treatment of Alzheimer’s Disease. Curr Top Med Chem 2019; 19:1173-1187. [DOI: 10.2174/1568026619666190617155326] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 01/12/2019] [Accepted: 04/10/2019] [Indexed: 02/07/2023]
Abstract
Background:
Alzheimers Disease (AD) is a neurodegenerative disease which is characterized by
the deposition of amyloid plaques in the brain- a concept supported by most of the researchers worldwide. The
main component of the plaques being amyloid-beta (Aβ42) results from the sequential cleavage of Amyloid
precursor protein (APP) by beta and gamma secretase. This present study intends to inhibit the formation of
amyloid plaques by blocking the action of gamma secretase protein with Inhibitors (GSI).
Methods:
A number of Gamma Secretase Inhibitors (GSI) were targeted to the protein by molecular docking.
The inhibitor having the best affinity was used as a subject for further virtual screening methods to obtain
similar compounds. The generated compounds were docked again at the same docking site on the protein to
find a compound with higher affinity to inhibit the protein. The highlights of virtually screened compound
consisted of Pharmacophore Mapping of the docking site. These steps were followed by comparative assessments
for both the compounds, obtained from the two aforesaid docking studies, which included interaction
energy descriptors, ADMET profiling and PreADMET evaluations.
Results:
111 GSI classified as azepines, sulfonamides and peptide isosteres were used in the study. By molecular
docking an amorpholino-amide, compound (22), was identified to be the high affinity compound GSI
along with its better interaction profiles.The virtually screened pubchem compound AKOS001083915
(CID:24462213) shows the best affinity with gamma secretase. Collective Pharmacophore mapping (H bonds,
electrostatic profile, binding pattern and solvent accesibility) shows a stable interaction. The resulting ADMETand
Descriptor values were nearly equivalent.
Conclusion:
These compounds identified herein hold a potential as Gamma Secretase inhibitors.According to
PreADMET values the compound AKOS001083915 is effective and specific to the target protein. Its
BOILED-egg plot analysis infers the compound permeable to blood brain barrier.Comparative study for both
the compounds resulted in having nearly equivalent properties. These compounds have the capacity to inhibit
the protein which is indirectly responsible for the formation of amyloid plaques and can be further put to in
vitro pharmacokinetic and dynamic studies.
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Affiliation(s)
- Meer Asif Ali
- In silico Research Laboratory, Eminent Biosciences, Mahalakshmi Nagar, Indore – 452010, Madhya Pradesh, India
| | - Sugunakar Vuree
- Department of Biotechnology, Lovely Faculty of Technology and Sciences, Division of Research and Development, Lovely Professional University, Phagwara, Punjab, India
| | - Himshikha Goud
- In silico Research Laboratory, Eminent Biosciences, Mahalakshmi Nagar, Indore – 452010, Madhya Pradesh, India
| | - Tajamul Hussain
- Center of Excellence in Biotechnology Research, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Anuraj Nayarisseri
- In silico Research Laboratory, Eminent Biosciences, Mahalakshmi Nagar, Indore – 452010, Madhya Pradesh, India
| | - Sanjeev Kumar Singh
- Computer Aided Drug Designing and Molecular Modeling Lab, Department of Bioinformatics, Alagappa University, Karaikudi-630 003, Tamil Nadu, India
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21
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Lu HY, Zu YX, Jiang XW, Sun XT, Liu TY, Li RL, Wu Q, Zhang YS, Zhao QC. Novel ADAM-17 inhibitor ZLDI-8 inhibits the proliferation and metastasis of chemo-resistant non-small-cell lung cancer by reversing Notch and epithelial mesenchymal transition in vitro and in vivo. Pharmacol Res 2019; 148:104406. [PMID: 31442576 DOI: 10.1016/j.phrs.2019.104406] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/21/2019] [Accepted: 08/19/2019] [Indexed: 01/09/2023]
Abstract
Acquired drug-resistant non-small cell lung cancer (NSCLC) has strong proliferation ability and is prone to epithelial-mesenchymal transition (EMT) and subsequent metastasis. Notch pathway mediates cell survival and EMT and is involved in the induction of multidrug resistance (MDR). ZLDI-8 is an inhibitor of Notch activating/cleaving enzyme ADAM-17 we found before. However, the effects of ZLDI-8 on resistant NSCLC was unclear. Here, we demonstrated for the first time that ZLDI-8 could induce apoptosis in lung cancer, especially in chemotherapy-resistant non-small cell lung cancer cells, and also inhibit migration, invasion and EMT phenotype of drug-resistant lung cancer. ZLDI-8 inhibits the Notch signaling pathway, thereby regulating the expression of survival/apoptosis and EMT-related proteins. Moreover, ZLDI-8 suppresses multidrug-resistant lung cancer xenograft growth in vivo and blocks metastasis in a tail vein injection mice model. Therefore, ZLDI-8 is expected to be an effective agent in the treatment of drug-resistant lung cancer.
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Affiliation(s)
- Hong-Yuan Lu
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China; Department of Pharmacy, General Hospital of Northern Theater Command, Shenyang 110840, China
| | - Yu-Xin Zu
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiao-Wen Jiang
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiao-Tong Sun
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Tian-Yi Liu
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Ruo-Lan Li
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Qiong Wu
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Ying-Shi Zhang
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Qing-Chun Zhao
- Department of Life Science and Biochemistry, Shenyang Pharmaceutical University, Shenyang 110016, China; Department of Pharmacy, General Hospital of Northern Theater Command, Shenyang 110840, China.
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22
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Disruption of NOTCH signaling by a small molecule inhibitor of the transcription factor RBPJ. Sci Rep 2019; 9:10811. [PMID: 31346210 PMCID: PMC6658660 DOI: 10.1038/s41598-019-46948-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 07/03/2019] [Indexed: 01/08/2023] Open
Abstract
NOTCH plays a pivotal role during normal development and in congenital disorders and cancer. γ-secretase inhibitors are commonly used to probe NOTCH function, but also block processing of numerous other proteins. We discovered a new class of small molecule inhibitor that disrupts the interaction between NOTCH and RBPJ, which is the main transcriptional effector of NOTCH signaling. RBPJ Inhibitor-1 (RIN1) also blocked the functional interaction of RBPJ with SHARP, a scaffold protein that forms a transcriptional repressor complex with RBPJ in the absence of NOTCH signaling. RIN1 induced changes in gene expression that resembled siRNA silencing of RBPJ rather than inhibition at the level of NOTCH itself. Consistent with disruption of NOTCH signaling, RIN1 inhibited the proliferation of hematologic cancer cell lines and promoted skeletal muscle differentiation from C2C12 myoblasts. Thus, RIN1 inhibits RBPJ in its repressing and activating contexts, and can be exploited for chemical biology and therapeutic applications.
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23
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Dickinson MS, Anderson LN, Webb-Robertson BJM, Hansen JR, Smith RD, Wright AT, Hybiske K. Proximity-dependent proteomics of the Chlamydia trachomatis inclusion membrane reveals functional interactions with endoplasmic reticulum exit sites. PLoS Pathog 2019; 15:e1007698. [PMID: 30943267 PMCID: PMC6464245 DOI: 10.1371/journal.ppat.1007698] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 04/15/2019] [Accepted: 03/12/2019] [Indexed: 11/18/2022] Open
Abstract
Chlamydia trachomatis is the most common cause of bacterial sexually transmitted infection, responsible for millions of infections each year. Despite this high prevalence, the elucidation of the molecular mechanisms of Chlamydia pathogenesis has been difficult due to limitations in genetic tools and its intracellular developmental cycle. Within a host epithelial cell, chlamydiae replicate within a vacuole called the inclusion. Many Chlamydia-host interactions are thought to be mediated by the Inc family of type III secreted proteins that are anchored in the inclusion membrane, but their array of host targets are largely unknown. To investigate how the inclusion membrane proteome changes over the course of an infected cell, we have adapted the APEX2 system of proximity-dependent biotinylation. APEX2 is capable of specifically labeling proteins within a 20 nm radius in living cells. We transformed C. trachomatis to express the enzyme APEX2 fused to known inclusion membrane proteins, allowing biotinylation and purification of inclusion-associated proteins. Using quantitative mass spectrometry against APEX2 labeled samples, we identified over 400 proteins associated with the inclusion membrane at early, middle, and late stages of epithelial cell infection. This system was sensitive enough to detect inclusion interacting proteins early in the developmental cycle, at 8 hours post infection, a previously intractable time point. Mass spectrometry analysis revealed a novel, early association between C. trachomatis inclusions and endoplasmic reticulum exit sites (ERES), functional regions of the ER where COPII-coated vesicles originate. Pharmacological and genetic disruption of ERES function severely restricted early chlamydial growth and the development of infectious progeny. APEX2 is therefore a powerful in situ approach for identifying critical protein interactions on the membranes of pathogen-containing vacuoles. Furthermore, the data derived from proteomic mapping of Chlamydia inclusions has illuminated an important functional role for ERES in promoting chlamydial developmental growth.
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Affiliation(s)
- Mary S. Dickinson
- Department of Global Health, Graduate Program in Pathobiology, University of Washington, Seattle, WA, United States of America
- Department of Medicine, Division of Allergy and Infectious Diseases, Center for Emerging and Reemerging Infectious Disease (CERID), University of Washington, Seattle, WA, United States of America
| | - Lindsey N. Anderson
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | | | - Joshua R. Hansen
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Richard D. Smith
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Aaron T. Wright
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America
- The Gene and Linda Voiland College of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, United States of America
| | - Kevin Hybiske
- Department of Global Health, Graduate Program in Pathobiology, University of Washington, Seattle, WA, United States of America
- Department of Medicine, Division of Allergy and Infectious Diseases, Center for Emerging and Reemerging Infectious Disease (CERID), University of Washington, Seattle, WA, United States of America
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24
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Rosales Ramirez R, Ludert JE. The Dengue Virus Nonstructural Protein 1 (NS1) Is Secreted from Mosquito Cells in Association with the Intracellular Cholesterol Transporter Chaperone Caveolin Complex. J Virol 2019; 93:e01985-18. [PMID: 30463973 PMCID: PMC6364000 DOI: 10.1128/jvi.01985-18] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 11/10/2018] [Indexed: 12/16/2022] Open
Abstract
Dengue virus (DENV) is a mosquito-borne virus of the family Flaviviridae The RNA viral genome encodes three structural and seven nonstructural proteins. Nonstructural protein 1 (NS1) is a multifunctional protein actively secreted in vertebrate and mosquito cells during infection. In mosquito cells, NS1 is secreted in a caveolin-1-dependent manner by an unconventional route. The caveolin chaperone complex (CCC) is a cytoplasmic complex formed by caveolin-1 and the chaperones FKBP52, Cy40, and CyA and is responsible for the cholesterol traffic inside the cell. In this work, we demonstrate that in mosquito cells, but not in vertebrate cells, NS1 associates with and relies on the CCC for secretion. Treatment of mosquito cells with classic secretion inhibitors, such as brefeldin A, Golgicide A, and Fli-06, showed no effect on NS1 secretion but significant reductions in recombinant luciferase secretion and virion release. Silencing the expression of CAV-1 or FKBP52 with short interfering RNAs or the inhibition of CyA by cyclosporine resulted in significant decrease in NS1 secretion, again without affecting virion release. Colocalization, coimmunoprecipitation, and proximity ligation assays indicated that NS1 colocalizes and interacts with all proteins of the CCC. In addition, CAV-1 and FKBP52 expression was found augmented in DENV-infected cells. Results obtained with Zika virus-infected cells suggest that in mosquito cells, ZIKV NS1 follows the same secretory pathway as that observed for DENV NS1. These results uncover important differences in the dengue virus-cell interactions between the vertebrate host and the mosquito vector as well as novel functions for the chaperone caveolin complex.IMPORTANCE The dengue virus protein NS1 is secreted efficiently from both infected vertebrate and mosquito cells. Previously, our group reported that NS1 secretion in mosquito cells follows an unconventional secretion pathway dependent on caveolin-1. In this work, we demonstrate that in mosquito cells, but not in vertebrate cells, NS1 secretion takes place in association with the chaperone caveolin complex, a complex formed by caveolin-1 and the chaperones FKBP52, CyA, and Cy40, which are in charge of cholesterol transport inside the cell. Results obtained with ZIKV-infected mosquito cells suggest that ZIKV NS1 is released following an unconventional secretory route in association with the chaperone caveolin complex. These results uncover important differences in the virus-cell interactions between the vertebrate host and the mosquito vector, as well as novel functions for the chaperone caveolin complex. Moreover, manipulation of the NS1 secretory route may prove a valuable strategy to combat these two mosquito-borne diseases.
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Affiliation(s)
- Romel Rosales Ramirez
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
| | - Juan E Ludert
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies (CINVESTAV-IPN), Mexico City, Mexico
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25
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Yu DP, Zhou Y. Astrocyte Elevated Gene 1 (AEG-1) Acts as a Promoter Gene in Clear Cell Renal Cell Carcinoma Cell Growth and Metastasis. Med Sci Monit 2018; 24:8213-8223. [PMID: 30431025 PMCID: PMC6253984 DOI: 10.12659/msm.911010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Background Clear cell renal cell carcinoma (ccRCC) is usually incurable once it progresses to metastatic stage. Hence, in-depth investigations to reveal the precise molecular mechanisms behind the metastasis of ccRCC are required to improve the therapeutic outcome of ccRCC. Material/Methods The level of astrocyte elevated gene 1 (AEG-1) in ccRCC tissues and cell lines was determined by quantitative real-time PCR (qRT-PCR) assay. The MTS, colony formation, wound-healing, and Transwell invasion assays were used to assess the role of AEG-1 in ccRCC cells growth, migration, and invasion in vitro, respectively. Xenograft model and lung metastasis models were constructed to analyze the functions of AEG-1 in ccRCC cells growth and metastasis in vivo. Result We found that AEG-1 was overexpressed in ccRCC and was associated with the progression of ccRCC. Knocked-down AEG-1 impaired the migration and invasion of ccRCC cells in vitro. Furthermore, under-expression of AEG-1 caused complete inhibition of ccRCC cells growth and metastasis in vivo. In contrast, overexpression of AEG-1 significantly increased the migration and invasion ability of ccRCC cells in vitro. Finally, we revealed that AEG-1 boosted the metastatic ability of ccRCC cells via regulating Notch homolog 1 (Notch1). Conclusions The AEG-1/Notch1 signaling axis plays a vital role in ccRCC cell growth and metastasis.
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Affiliation(s)
- Da Peng Yu
- Department of Surgical Urology, The First People's Hospital of Jining City, Jining, Shandong, China (mainland)
| | - Yan Zhou
- Department of Surgical Urology, Wenshang County's First People's Hospital, Wenshang, Shandong, China (mainland)
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26
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Driessen RCH, Stassen OMJA, Sjöqvist M, Suarez Rodriguez F, Grolleman J, Bouten CVC, Sahlgren CM. Shear stress induces expression, intracellular reorganization and enhanced Notch activation potential of Jagged1. Integr Biol (Camb) 2018; 10:719-726. [PMID: 30328449 PMCID: PMC6256362 DOI: 10.1039/c8ib00036k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 09/15/2018] [Indexed: 01/20/2023]
Abstract
Notch signaling and blood flow regulate vascular formation and maturation, but how shear stress affects the different components of the Notch pathway in endothelial cells is poorly understood. We show that laminar shear stress results in a ligand specific gene expression profile in endothelial cells (HUVEC). JAG1 expression increases while DLL4 expression decreases. Jagged1 shows a unique response by clustering intracellularly six to nine hours after the onset of flow. The formation of the Jagged1 clusters requires protein production, ER export and endocytosis. Clustering is associated with reduced membrane levels but is not affected by Notch signaling activity. Jagged1 relocalization is reversible, the clusters disappear and membrane levels increase upon removal of shear stress. We further demonstrate that the signaling potential of endothelial cells is enhanced after exposure to shear stress. Together we demonstrate a Jagged1 specific shear stress response for Notch signaling in endothelial cells.
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Affiliation(s)
- R. C. H. Driessen
- Department of Biomedical Engineering, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
.
- Institute for Complex Molecular Systems, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
| | - O. M. J. A. Stassen
- Department of Biomedical Engineering, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
.
| | - M. Sjöqvist
- Faculty of Science and Engineering, Biosciences, Åbo Akademi University
,
Turku
, Finland
| | - F. Suarez Rodriguez
- Faculty of Science and Engineering, Biosciences, Åbo Akademi University
,
Turku
, Finland
| | - J. Grolleman
- Department of Biomedical Engineering, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
.
| | - C. V. C. Bouten
- Department of Biomedical Engineering, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
.
- Institute for Complex Molecular Systems, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
| | - C. M. Sahlgren
- Department of Biomedical Engineering, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
.
- Institute for Complex Molecular Systems, Eindhoven University of Technology
,
Eindhoven
, The Netherlands
- Faculty of Science and Engineering, Biosciences, Åbo Akademi University
,
Turku
, Finland
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27
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Tansi FL, Filatova MP, Koroev DO, Volpina OM, Lange S, Schumann C, Teichgräber UK, Reissmann S, Hilger I. New generation CPPs show distinct selectivity for cancer and noncancer cells. J Cell Biochem 2018; 120:6528-6541. [DOI: 10.1002/jcb.27943] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 10/02/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Felista L. Tansi
- Department of Experimental Radiology, Institute of Diagnostic and Interventional Radiology Jena University Hospital Jena Germany
| | - Margarita P. Filatova
- Shemyakin‐Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences Moscow Russia
| | - Dmitri O. Koroev
- Shemyakin‐Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences Moscow Russia
| | - Olga M. Volpina
- Shemyakin‐Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences Moscow Russia
| | | | | | - Ulf K. Teichgräber
- Department of Experimental Radiology, Institute of Diagnostic and Interventional Radiology Jena University Hospital Jena Germany
| | - Siegmund Reissmann
- Jena Bioscience GmbH Jena Germany
- Centrum of Molecular Biomedicine, Institute of Biochemistry and Biophysics, Friedrich‐Schiller‐University Jena Germany
| | - Ingrid Hilger
- Department of Experimental Radiology, Institute of Diagnostic and Interventional Radiology Jena University Hospital Jena Germany
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28
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DelBove CE, Deng XZ, Zhang Q. The Fate of Nascent APP in Hippocampal Neurons: A Live Cell Imaging Study. ACS Chem Neurosci 2018; 9:2225-2232. [PMID: 29869871 DOI: 10.1021/acschemneuro.8b00226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Amyloid precursor protein (APP) is closely associated with Alzheimer's disease (AD) because its proteolytic products form amyloid plaques and its mutations are linked to familial AD patients. As a membrane protein, APP is involved in neuronal development and plasticity. However, it remains unclear how nascent APP is distributed and transported to designated membrane compartments to execute its diverse functions. Here, we employed a dual-tagged APP fusion protein in combination with a synaptic vesicle marker to study the surface trafficking and cleavage of APP in hippocampal neurons immediately after its synthesis. Using long-term time-lapse imaging, we found that a considerable amount of nascent APP was directly transported to the somatodendritic surface, from which it propagates to distal neurites. Some APP in the plasma membrane was endocytosed and some was cleaved by α-secretase. Hence, we conclude that surface transportation of APP is a major step preceding its proteolytic processing and neuritic distribution.
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Affiliation(s)
- Claire E. DelBove
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37232-6600, United States
| | - Xian-zhen Deng
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37232-6600, United States
| | - Qi Zhang
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37232-6600, United States
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29
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Modulating transcription factor activity: Interfering with protein-protein interaction networks. Semin Cell Dev Biol 2018; 99:12-19. [PMID: 30172762 DOI: 10.1016/j.semcdb.2018.07.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 02/16/2018] [Accepted: 07/17/2018] [Indexed: 11/23/2022]
Abstract
Biophysical parameters that govern transcription factors activity are binding locations across the genome, dwelling time at these regulatory elements and specific protein-protein interactions. Most molecular strategies used to develop small compounds that block transcription factors activity have been based on biochemistry and cell biology methods that that do not take into consideration these key biophysical features. Here, we review the advance in the field of transcription factor biology and describe how their interactome and transcriptional regulation on a genome wide scale have been deciphered. We suggest that this new knowledge has the potential to be used to implement innovative research drug discovery program.
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30
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Gómez-Galeno JE, Hurtado C, Cheng J, Yardimci C, Mercola M, Cashman JR. b-Annulated 1,4-dihydropyridines as Notch inhibitors. Bioorg Med Chem Lett 2018; 28:3363-3367. [PMID: 30201292 DOI: 10.1016/j.bmcl.2018.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/19/2018] [Accepted: 09/03/2018] [Indexed: 12/31/2022]
Abstract
The Notch signaling pathway is involved in cell proliferation and differentiation, and has been recognized as an active pathway in regenerating tissue and cancerous cells. Notch signaling inhibition is considered a viable approach to the treatment of a variety of conditions including colorectal cancer, pancreatic cancer, breast cancer and metastatic melanoma. The discovery that the b-annulated dihydropyridine FLI-06 (1) is an inhibitor of the Notch pathway with an EC50 ≈ 2.5 μM prompted us to screen a library of related analogs. After structure activity studies were conducted, racemic compound 7 was identified with an EC50 = 0.36 μM. Synthesis of individual enantiomers provided (+)-7 enantiomer with an EC50 = 0.13 μM, or about 20-fold the potency of 1.
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Affiliation(s)
- Jorge E Gómez-Galeno
- Human BioMolecular Research Institute, 5310 Eastgate Mall, San Diego, CA 92121-2804, United States.
| | - Cecilia Hurtado
- Cardiovascular Institute and Department of Medicine, Stanford University, 300 Pasteur Drive, MC-5501, Stanford, CA 94305, United States
| | - Jiongjia Cheng
- Human BioMolecular Research Institute, 5310 Eastgate Mall, San Diego, CA 92121-2804, United States
| | - Ceren Yardimci
- Human BioMolecular Research Institute, 5310 Eastgate Mall, San Diego, CA 92121-2804, United States
| | - Mark Mercola
- Cardiovascular Institute and Department of Medicine, Stanford University, 300 Pasteur Drive, MC-5501, Stanford, CA 94305, United States
| | - John R Cashman
- Human BioMolecular Research Institute, 5310 Eastgate Mall, San Diego, CA 92121-2804, United States
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31
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Lu Z, Ren Y, Zhang M, Fan T, Wang Y, Zhao Q, Liu HM, Zhao W, Hou G. FLI-06 suppresses proliferation, induces apoptosis and cell cycle arrest by targeting LSD1 and Notch pathway in esophageal squamous cell carcinoma cells. Biomed Pharmacother 2018; 107:1370-1376. [PMID: 30257352 DOI: 10.1016/j.biopha.2018.08.140] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/24/2018] [Accepted: 08/25/2018] [Indexed: 12/15/2022] Open
Abstract
Aberrant activation of the Notch signaling plays an important role in progression of esophageal squamous cell carcinoma (ESCC) and may represent a potential therapeutic target for ESCC. FLI-06 is a novel Notch inhibitor, preventing the early secretion of Notch signaling. However, little information about the antitumor activity of FLI-06 has been reported so far. To evaluate the anti-tumor activity and possible molecular mechanism of FLI-06 to ESCC cells, the effects of FLI-06 on cell viability, apoptosis and cell cycle were evaluated by CCK-8 and flow cytometry assays, respectively, in ESCC cell lines ECa109 and EC9706, and the expressions of proteins in Notch signaling pathway and LSD1 were investigated after cells were treated with FLI-06 by Western blotting. The results showed that FLI-06 blocked proliferation, induced apoptosis and G1 phase arrest of ESCC cells in a dose-dependent manner. Mechanistically, we found FLI-06 could inhibit Notch signaling pathway by decreasing the expressions of Notch3, DTX1 and Hes1. Interestingly, we also found that the expression of LSD1 (histone lysine specific demethylase 1), which is dysregulated in multiple tumors, was also inhibited by FLI-06. In addition, inhibition of Notch pathway by γ-secretase inhibitor GSI-DAPT could also inhibit LSD1 expression. The current study demonstrated that FLI-06 exerts antitumor activity on ESCC by inhibiting both LSD1 and Notch pathway, which provides the theory support for the treatment of ESCC with FLI-06.
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Affiliation(s)
- Zhaoming Lu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; Collaborative Innovation Center of Cancer Chemoprevention, Henan Province, Zhengzhou 450001, China
| | - Yandan Ren
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Mengying Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Tianli Fan
- School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Yang Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Qi Zhao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Hong-Min Liu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou University, Zhengzhou, China
| | - Wen Zhao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou University, Zhengzhou, China
| | - Guiqin Hou
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; Co-Innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou University, Zhengzhou, China.
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Tam AB, Roberts LS, Chandra V, Rivera IG, Nomura DK, Forbes DJ, Niwa M. The UPR Activator ATF6 Responds to Proteotoxic and Lipotoxic Stress by Distinct Mechanisms. Dev Cell 2018; 46:327-343.e7. [PMID: 30086303 DOI: 10.1016/j.devcel.2018.04.023] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 04/13/2018] [Accepted: 04/24/2018] [Indexed: 02/06/2023]
Abstract
The unfolded protein response (UPR) is induced by proteotoxic stress of the endoplasmic reticulum (ER). Here we report that ATF6, a major mammalian UPR sensor, is also activated by specific sphingolipids, dihydrosphingosine (DHS) and dihydroceramide (DHC). Single mutations in a previously undefined transmembrane domain motif that we identify in ATF6 incapacitate DHS/DHC activation while still allowing proteotoxic stress activation via the luminal domain. ATF6 thus possesses two activation mechanisms: DHS/DHC activation and proteotoxic stress activation. Reporters constructed to monitor each mechanism show that phenobarbital-induced ER membrane expansion depends on transmembrane domain-induced ATF6. DHS/DHC addition preferentially induces transcription of ATF6 target lipid biosynthetic and metabolic genes over target ER chaperone genes. Importantly, ATF6 containing a luminal achromatopsia eye disease mutation, unresponsive to proteotoxic stress, can be activated by fenretinide, a drug that upregulates DHC, suggesting a potential therapy for this and other ATF6-related diseases including heart disease and stroke.
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Affiliation(s)
- Arvin B Tam
- Division of Biological Sciences, Section of Molecular Biology, University of California, San Diego, NSB#1, Rm5328, 9500 Gilman Drive, La Jolla, CA 92093-0377, USA
| | - Lindsay S Roberts
- Department of Chemistry, Molecular and Cell Biology, and Nutritional Sciences and Toxicology, University of California, Berkeley, 127 Morgan Hall, Berkeley, CA 94720, USA
| | - Vivek Chandra
- Division of Biological Sciences, Section of Molecular Biology, University of California, San Diego, NSB#1, Rm5328, 9500 Gilman Drive, La Jolla, CA 92093-0377, USA
| | - Io Guane Rivera
- Division of Biological Sciences, Section of Molecular Biology, University of California, San Diego, NSB#1, Rm5328, 9500 Gilman Drive, La Jolla, CA 92093-0377, USA
| | - Daniel K Nomura
- Department of Chemistry, Molecular and Cell Biology, and Nutritional Sciences and Toxicology, University of California, Berkeley, 127 Morgan Hall, Berkeley, CA 94720, USA
| | - Douglass J Forbes
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California, San Diego, 2124A Pacific Hall, 9500 Gilman Drive, La Jolla, CA 92093-0347, USA
| | - Maho Niwa
- Division of Biological Sciences, Section of Molecular Biology, University of California, San Diego, NSB#1, Rm5328, 9500 Gilman Drive, La Jolla, CA 92093-0377, USA.
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Crosstalk between Notch, HIF-1α and GPER in Breast Cancer EMT. Int J Mol Sci 2018; 19:ijms19072011. [PMID: 29996493 PMCID: PMC6073901 DOI: 10.3390/ijms19072011] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/04/2018] [Accepted: 07/09/2018] [Indexed: 12/15/2022] Open
Abstract
The Notch signaling pathway acts in both physiological and pathological conditions, including embryonic development and tumorigenesis. In cancer progression, diverse mechanisms are involved in Notch-mediated biological responses, including angiogenesis and epithelial-mesenchymal-transition (EMT). During EMT, the activation of cellular programs facilitated by transcriptional repressors results in epithelial cells losing their differentiated features, like cell–cell adhesion and apical–basal polarity, whereas they gain motility. As it concerns cancer epithelial cells, EMT may be consequent to the evolution of genetic/epigenetic instability, or triggered by factors that can act within the tumor microenvironment. Following a description of the Notch signaling pathway and its major regulatory nodes, we focus on studies that have given insights into the functional interaction between Notch signaling and either hypoxia or estrogen in breast cancer cells, with a particular focus on EMT. Furthermore, we describe the role of hypoxia signaling in breast cancer cells and discuss recent evidence regarding a functional interaction between HIF-1α and GPER in both breast cancer cells and cancer-associated fibroblasts (CAFs). On the basis of these studies, we propose that a functional network between HIF-1α, GPER and Notch may integrate tumor microenvironmental cues to induce robust EMT in cancer cells. Further investigations are required in order to better understand how hypoxia and estrogen signaling may converge on Notch-mediated EMT within the context of the stroma and tumor cells interaction. However, the data discussed here may anticipate the potential benefits of further pharmacological strategies targeting breast cancer progression.
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Wen Z, Shen Y, Berry G, Shahram F, Li Y, Watanabe R, Liao YJ, Goronzy JJ, Weyand CM. The microvascular niche instructs T cells in large vessel vasculitis via the VEGF-Jagged1-Notch pathway. Sci Transl Med 2018; 9:9/399/eaal3322. [PMID: 28724574 DOI: 10.1126/scitranslmed.aal3322] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 03/07/2017] [Accepted: 05/31/2017] [Indexed: 12/11/2022]
Abstract
Microvascular networks in the adventitia of large arteries control access of inflammatory cells to the inner wall layers (media and intima) and thus protect the immune privilege of the aorta and its major branches. In autoimmune vasculitis giant cell arteritis (GCA), CD4 T helper 1 (TH1) and TH17 cells invade into the wall of the aorta and large elastic arteries to form tissue-destructive granulomas. Whether the disease microenvironment provides instructive cues for vasculitogenic T cells is unknown. We report that adventitial microvascular endothelial cells (mvECs) perform immunoregulatory functions by up-regulating the expression of the Notch ligand Jagged1. Vascular endothelial growth factor (VEGF), abundantly present in GCA patients' blood, induced Jagged1 expression, allowing mvECs to regulate effector T cell induction via the Notch-mTORC1 (mammalian target of rapamycin complex 1) pathway. We found that circulating CD4 T cells in GCA patients have left the quiescent state, actively signal through the Notch pathway, and differentiate into TH1 and TH17 effector cells. In an in vivo model of large vessel vasculitis, exogenous VEGF functioned as an effective amplifier to recruit and activate vasculitogenic T cells. Thus, systemic VEGF co-opts endothelial Jagged1 to trigger aberrant Notch signaling, biases responsiveness of CD4 T cells, and induces pathogenic effector functions. Adventitial microvascular networks function as an instructive tissue niche, which can be exploited to target vasculitogenic immunity in large vessel vasculitis.
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Affiliation(s)
- Zhenke Wen
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yi Shen
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Gerald Berry
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Farhad Shahram
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yinyin Li
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ryu Watanabe
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yaping Joyce Liao
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jörg J Goronzy
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Cornelia M Weyand
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA.
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Crosstalk of Autophagy and the Secretory Pathway and Its Role in Diseases. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2018; 337:153-184. [DOI: 10.1016/bs.ircmb.2017.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Whole proteome analysis of human tankyrase knockout cells reveals targets of tankyrase-mediated degradation. Nat Commun 2017; 8:2214. [PMID: 29263426 PMCID: PMC5738441 DOI: 10.1038/s41467-017-02363-w] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/21/2017] [Indexed: 02/01/2023] Open
Abstract
Tankyrase 1 and 2 are poly(ADP-ribose) polymerases that function in pathways critical to cancer cell growth. Tankyrase-mediated PARylation marks protein targets for proteasomal degradation. Here, we generate human knockout cell lines to examine cell function and interrogate the proteome. We show that either tankyrase 1 or 2 is sufficient to maintain telomere length, but both are required to resolve telomere cohesion and maintain mitotic spindle integrity. Quantitative analysis of the proteome of tankyrase double knockout cells using isobaric tandem mass tags reveals targets of degradation, including antagonists of the Wnt/β-catenin signaling pathway (NKD1, NKD2, and HectD1) and three (Notch 1, 2, and 3) of the four Notch receptors. We show that tankyrases are required for Notch2 to exit the plasma membrane and enter the nucleus to activate transcription. Considering that Notch signaling is commonly activated in cancer, tankyrase inhibitors may have therapeutic potential in targeting this pathway. Tankyrase 1 and 2 are poly(ADP-ribose) polymerases that mark proteins for degradation, but there is a current lack of knowledge about their distinct functions and substrates. Here, the authors elucidate the cellular roles and substrates of these polymerases using comparative functional and proteomics analyses of tankyrase knockout cell lines.
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Farhan H, Kundu M, Ferro-Novick S. The link between autophagy and secretion: a story of multitasking proteins. Mol Biol Cell 2017; 28:1161-1164. [PMID: 28468940 PMCID: PMC5415012 DOI: 10.1091/mbc.e16-11-0762] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 02/28/2017] [Accepted: 03/02/2017] [Indexed: 01/01/2023] Open
Abstract
The secretory and autophagy pathways can be thought of as the biosynthetic (i.e., anabolic) and degradative (i.e., catabolic) branches of the endomembrane system. In analogy to anabolic and catabolic pathways in metabolism, there is mounting evidence that the secretory and autophagy pathways are intimately linked and that certain regulatory elements are shared between them. Here we highlight the parallels and points of intersection between these two evolutionarily highly conserved and fundamental endomembrane systems. The intersection of these pathways may play an important role in remodeling membranes during cellular stress.
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Affiliation(s)
- Hesso Farhan
- Institute of Basic Medical Sciences, University of Oslo, 3072 Oslo, Norway
| | - Mondira Kundu
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN 38105
| | - Susan Ferro-Novick
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
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Al-Dhfyan A, Alhoshani A, Korashy HM. Aryl hydrocarbon receptor/cytochrome P450 1A1 pathway mediates breast cancer stem cells expansion through PTEN inhibition and β-Catenin and Akt activation. Mol Cancer 2017; 16:14. [PMID: 28103884 PMCID: PMC5244521 DOI: 10.1186/s12943-016-0570-y] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 12/11/2016] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Breast cancer stem cells (CSCs) are small sub-type of the whole cancer cells that drive tumor initiation, progression and metastasis. Recent studies have demonstrated a role for the aryl hydrocarbon receptor (AhR)/cytochrome P4501A1 pathway in CSCs expansion. However, the exact molecular mechanisms remain unclear. METHODS The current study was designed to a) determine the effect of AhR activation and inhibition on breast CSCs development, maintenance, self-renewal, and chemoresistance at the in vitro and in vivo levels and b) explore the role of β-Catenin, PI3K/Akt, and PTEN signaling pathways. To test this hypothesis, CSC characteristics of five human breast cancer cells; SKBR-3, MCF-7, and MDA-MB231, HS587T, and T47D treated with AhR activators or inhibitor were determined using Aldefluor assay, side population, and mammosphere formation. The mRNA, protein expression, cellular content and localization of the target genes were determined by RT-PCR, Western blot analysis, and Immunofluorescence, respectively. At the in vivo level, female Balb/c mice were treated with AhR/CYP1A1 inducer and histopathology changes and Immunohistochemistry examination for target proteins were determined. RESULTS The constitutive mRNA expression and cellular content of CYP1A1 and CYP1B1, AhR-regulated genes, were markedly higher in CSCs more than differentiating non-CSCs of five different human breast cancer cells. Activation of AhR/CYP1A1 in MCF-7 cells by TCDD and DMBA, strong AhR activators, significantly increased CSC-specific markers, mammosphere formation, aldehyde dehydrogenase (ALDH) activity, and percentage of side population (SP) cells, whereas inactivation of AhR/CYP1A1 using chemical inhibitor, α-naphthoflavone (α-NF), or by genetic shRNA knockdown, significantly inhibited the upregulation of ALDH activity and SP cells. Importantly, inactivation of the AhR/CYP1A1 significantly increased sensitization of CSCs to the chemotherapeutic agent doxorubicin. Mechanistically, Induction of AhR/CYP1A1 by TCDD and DMBA was associated with significant increase in β-Catenin mRNA and protein expression, nuclear translocation and its downstream target Cyclin D1, whereas AhR or CYP1A1 knockdown using shRNA dramatically inhibited β-Catenin cellular content and nuclear translocation. This was associated with significant inhibition of PTEN and induction of total and phosphorylated Akt protein expressions. Importantly, inhibition of PI3K/Akt pathway by LY294002 completely blocked the TCDD-induced SP cells expansion. In vivo, IHC staining of mammary gland structures of untreated and DMBA (30 mg/kg, IP)- treated mice, showed tremendous inhibition of PTEN expression accompanied with an increase in the expression p-Akt, β-Catenin and stem cells marker ALDH1. CONCLUSIONS The present study provides the first evidence that AhR/CYP1A1 signaling pathway is controlling breast CSCs proliferation, development, self-renewal and chemoresistance through inhibition of the PTEN and activation of β-Catenin and Akt pathways.
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Affiliation(s)
- Abdullah Al-Dhfyan
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia.,Stem Cell & Tissue Re-Engineering, King Faisal Specialist Hospital and Research Center, Riyadh, 11211, Saudi Arabia
| | - Ali Alhoshani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Hesham M Korashy
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia.
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Zacksenhaus E, Liu J, Jiang Z, Yao Y, Xia L, Shrestha M, Ben-David Y. Transcription Factors in Breast Cancer—Lessons From Recent Genomic Analyses and Therapeutic Implications. CHROMATIN PROTEINS AND TRANSCRIPTION FACTORS AS THERAPEUTIC TARGETS 2017; 107:223-273. [DOI: 10.1016/bs.apcsb.2016.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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40
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Yonemura Y, Li X, Müller K, Krämer A, Atigbire P, Mentrup T, Feuerhake T, Kroll T, Shomron O, Nohl R, Arndt HD, Hoischen C, Hemmerich P, Hirschberg K, Kaether C. Inhibition of cargo export at ER exit sites and the trans-Golgi network by the secretion inhibitor FLI-06. J Cell Sci 2016; 129:3868-3877. [PMID: 27587840 DOI: 10.1242/jcs.186163] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 08/25/2016] [Indexed: 12/21/2022] Open
Abstract
Export out of the endoplasmic reticulum (ER) involves the Sar1 and COPII machinery acting at ER exit sites (ERES). Whether and how cargo proteins are recruited upstream of Sar1 and COPII is unclear. Two models are conceivable, a recruitment model where cargo is actively transported through a transport factor and handed over to the Sar1 and COPII machinery in ERES, and a capture model, where cargo freely diffuses into ERES where it is captured by the Sar1 and COPII machinery. Using the novel secretion inhibitor FLI-06, we show that recruitment of the cargo VSVG to ERES is an active process upstream of Sar1 and COPII. Applying FLI-06 before concentration of VSVG in ERES completely abolishes its recruitment. In contrast, applying FLI-06 after VSVG concentration in ERES does not lead to dispersal of the concentrated VSVG, arguing that it inhibits recruitment to ERES as opposed to capture in ERES. FLI-06 also inhibits export out of the trans-Golgi network (TGN), suggesting that similar mechanisms might orchestrate cargo selection and concentration at the ER and TGN. FLI-06 does not inhibit autophagosome biogenesis and the ER-peroxisomal transport route, suggesting that these rely on different mechanisms.
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Affiliation(s)
- Yoji Yonemura
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Xiaolin Li
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Katja Müller
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Andreas Krämer
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Paul Atigbire
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Torben Mentrup
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Talitha Feuerhake
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Torsten Kroll
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Olga Shomron
- Pathology Department, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Richard Nohl
- Lehrstuhl für organische Chemie I, Friedrich-Schiller Universität, Jena 07743, Germany
| | - Hans-Dieter Arndt
- Lehrstuhl für organische Chemie I, Friedrich-Schiller Universität, Jena 07743, Germany
| | - Christian Hoischen
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Peter Hemmerich
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
| | - Koret Hirschberg
- Pathology Department, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Christoph Kaether
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, Jena 07745, Germany
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Karanasios E, Walker SA, Okkenhaug H, Manifava M, Hummel E, Zimmermann H, Ahmed Q, Domart MC, Collinson L, Ktistakis NT. Autophagy initiation by ULK complex assembly on ER tubulovesicular regions marked by ATG9 vesicles. Nat Commun 2016; 7:12420. [PMID: 27510922 PMCID: PMC4987534 DOI: 10.1038/ncomms12420] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 06/30/2016] [Indexed: 12/11/2022] Open
Abstract
Autophagosome formation requires sequential translocation of autophagy-specific proteins to membranes enriched in PI3P and connected to the ER. Preceding this, the earliest autophagy-specific structure forming de novo is a small punctum of the ULK1 complex. The provenance of this structure and its mode of formation are unknown. We show that the ULK1 structure emerges from regions, where ATG9 vesicles align with the ER and its formation requires ER exit and coatomer function. Super-resolution microscopy reveals that the ULK1 compartment consists of regularly assembled punctate elements that cluster in progressively larger spherical structures and associates uniquely with the early autophagy machinery. Correlative electron microscopy after live imaging shows tubulovesicular membranes present at the locus of this structure. We propose that the nucleation of autophagosomes occurs in regions, where the ULK1 complex coalesces with ER and the ATG9 compartment.
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Affiliation(s)
| | - Simon A. Walker
- Signalling Programme, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Hanneke Okkenhaug
- Signalling Programme, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Maria Manifava
- Signalling Programme, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Eric Hummel
- Carl Zeiss Microscopy GmbH, Munich 81379, Germany
| | | | - Qashif Ahmed
- Signalling Programme, The Babraham Institute, Cambridge CB22 3AT, UK
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Kroll T, Schmidt D, Schwanitz G, Ahmad M, Hamann J, Schlosser C, Lin YC, Böhm KJ, Tuckermann J, Ploubidou A. High-Content Microscopy Analysis of Subcellular Structures: Assay Development and Application to Focal Adhesion Quantification. ACTA ACUST UNITED AC 2016; 77:12.43.1-12.43.44. [PMID: 27367288 DOI: 10.1002/cpcy.7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
High-content analysis (HCA) converts raw light microscopy images to quantitative data through the automated extraction, multiparametric analysis, and classification of the relevant information content. Combined with automated high-throughput image acquisition, HCA applied to the screening of chemicals or RNAi-reagents is termed high-content screening (HCS). Its power in quantifying cell phenotypes makes HCA applicable also to routine microscopy. However, developing effective HCA and bioinformatic analysis pipelines for acquisition of biologically meaningful data in HCS is challenging. Here, the step-by-step development of an HCA assay protocol and an HCS bioinformatics analysis pipeline are described. The protocol's power is demonstrated by application to focal adhesion (FA) detection, quantitative analysis of multiple FA features, and functional annotation of signaling pathways regulating FA size, using primary data of a published RNAi screen. The assay and the underlying strategy are aimed at researchers performing microscopy-based quantitative analysis of subcellular features, on a small scale or in large HCS experiments. © 2016 by John Wiley & Sons, Inc.
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Affiliation(s)
- Torsten Kroll
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany.,These authors contributed equally to this work
| | - David Schmidt
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany.,Current address: Max Planck Institute for Molecular Biomedicine, Münster, Germany.,These authors contributed equally to this work
| | - Georg Schwanitz
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany
| | - Mubashir Ahmad
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany.,Institute for Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
| | - Jana Hamann
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany
| | | | - Yu-Chieh Lin
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany
| | - Konrad J Böhm
- Leibniz Institute on Aging-Fritz Lipmann Institute, Jena, Germany
| | - Jan Tuckermann
- Institute for Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
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Kumar R, Juillerat-Jeanneret L, Golshayan D. Notch Antagonists: Potential Modulators of Cancer and Inflammatory Diseases. J Med Chem 2016; 59:7719-37. [DOI: 10.1021/acs.jmedchem.5b01516] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Rajesh Kumar
- Transplantation
Center and Transplantation Immunopathology Laboratory, Department
of Medicine and ‡University Institute of Pathology, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), CH-1011 Lausanne, Switzerland
| | - Lucienne Juillerat-Jeanneret
- Transplantation
Center and Transplantation Immunopathology Laboratory, Department
of Medicine and ‡University Institute of Pathology, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), CH-1011 Lausanne, Switzerland
| | - Dela Golshayan
- Transplantation
Center and Transplantation Immunopathology Laboratory, Department
of Medicine and ‡University Institute of Pathology, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), CH-1011 Lausanne, Switzerland
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Chen J, Guo J, Yang T, Li W, Lamothe SM, Kang Y, Szendrey JA, Zhang S. Rab11-dependent Recycling of the Human Ether-a-go-go-related Gene (hERG) Channel. J Biol Chem 2015; 290:21101-21113. [PMID: 26152716 DOI: 10.1074/jbc.m115.636324] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Indexed: 02/01/2023] Open
Abstract
The human ether-a-go-go-related gene (hERG) encodes the pore-forming subunit of the rapidly activating delayed rectifier potassium channel (IKr). A reduction in the hERG current causes long QT syndrome, which predisposes affected individuals to ventricular arrhythmias and sudden death. We reported previously that hERG channels in the plasma membrane undergo vigorous internalization under low K(+) conditions. In the present study, we addressed whether hERG internalization occurs under normal K(+) conditions and whether/how internalized channels are recycled back to the plasma membrane. Using patch clamp, Western blot, and confocal imaging analyses, we demonstrated that internalized hERG channels can effectively recycle back to the plasma membrane. Low K(+)-enhanced hERG internalization is accompanied by an increased rate of hERG recovery in the plasma membrane upon reculture following proteinase K-mediated clearance of cell-surface proteins. The increased recovery rate is not due to enhanced protein synthesis, as hERG mRNA expression was not altered by low K(+) exposure, and the increased recovery was observed in the presence of the protein biosynthesis inhibitor cycloheximide. GTPase Rab11, but not Rab4, is involved in the recycling of hERG channels. Interfering with Rab11 function not only delayed hERG recovery in cells after exposure to low K(+) medium but also decreased hERG expression and function in cells under normal culture conditions. We concluded that the recycling pathway plays an important role in the homeostasis of plasma membrane-bound hERG channels.
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Affiliation(s)
- Jeffery Chen
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Jun Guo
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Tonghua Yang
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Wentao Li
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Shawn M Lamothe
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Yudi Kang
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - John A Szendrey
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Shetuan Zhang
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada.
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Tansi F, Kallweit E, Kaether C, Kappe K, Schumann C, Hilger I, Reissmann S. Internalization of Near-Infrared Fluorescently Labeled Activatable Cell-Penetrating Peptide and of Proteins into Human Fibrosarcoma Cell Line HT-1080. J Cell Biochem 2015; 116:1222-31. [DOI: 10.1002/jcb.25075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 12/19/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Felista Tansi
- Institute of Diagnostic and Interventional Radiology; Department of Experimental Radiology; Jena University Hospital; Friedrich-Schiller University; Erlanger Allee 101 Jena 07747 Germany
| | - Eric Kallweit
- Institute of Diagnostic and Interventional Radiology; Department of Experimental Radiology; Jena University Hospital; Friedrich-Schiller University; Erlanger Allee 101 Jena 07747 Germany
- Ernst-Abbe-University of Applied Sciences; Carl-Zeiss-Promenade 2 Jena 07745 Germany
| | - Christoph Kaether
- Leibniz Institute for Age Research; Fritz-Lipmann-Institute; Beutenbergstr. 11 Jena 07745 Germany
| | - Katarina Kappe
- Jena Bioscience GmbH; Loebstedter Str. 80 Jena 07749 Germany
| | - Christina Schumann
- Ernst-Abbe-University of Applied Sciences; Carl-Zeiss-Promenade 2 Jena 07745 Germany
| | - Ingrid Hilger
- Institute of Diagnostic and Interventional Radiology; Department of Experimental Radiology; Jena University Hospital; Friedrich-Schiller University; Erlanger Allee 101 Jena 07747 Germany
| | - Siegmund Reissmann
- Jena Bioscience GmbH; Loebstedter Str. 80 Jena 07749 Germany
- Centrum of Molecular Biomedicine; Institute of Biochemistry and Biophysics; Friedrich- Schiller-University; Dornburger Str. 25 Jena 07743 Germany
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Abstract
Acute lymphoblastic leukemia is the most common malignancy in children. Although it is now curable in 80-90% of cases, patients with T-cell acute lymphoblastic leukemia (T-ALL) experience a higher frequency of induction failure and early relapse. Despite aggressive treatment approaches, including transplantation and new salvage regimens, most children with relapsed T-ALL will not be cured. As such, we are in need of new targeted therapies for the disease. Recent advances in the molecular characterization of T-ALL have uncovered a number of new therapeutic targets. This review will summarize recent advancements in the study of inhibiting the NOTCH1, PI3K-AKT, and Cyclin D3:CDK4/6 pathways as therapeutic strategies for T-ALL. We will focus on pre-clinical studies supporting the testing of small-molecule inhibitors targeting these proteins and the rationale of combination therapies. Moreover, epigenetic approaches to modulate T-ALL are rapidly emerging. Here, we will discuss the data supporting the role of bromodomain and extra-terminal bromodomain inhibitors in human T-ALL.
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Affiliation(s)
- Giovanni Roti
- Department of Pediatric Oncology, Dana-Farber Cancer Institute , Boston, MA , USA ; Division of Hematology/Oncology, Boston Children's Hospital , Boston, MA , USA ; Hematology and Bone Marrow Transplantation Unit, University of Perugia , Perugia , Italy
| | - Kimberly Stegmaier
- Department of Pediatric Oncology, Dana-Farber Cancer Institute , Boston, MA , USA ; Division of Hematology/Oncology, Boston Children's Hospital , Boston, MA , USA ; Broad Institute of Harvard and Massachusetts Institute of Technology , Cambridge, MA , USA
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Ntziachristos P, Lim JS, Sage J, Aifantis I. From fly wings to targeted cancer therapies: a centennial for notch signaling. Cancer Cell 2014; 25:318-34. [PMID: 24651013 PMCID: PMC4040351 DOI: 10.1016/j.ccr.2014.02.018] [Citation(s) in RCA: 275] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 01/21/2014] [Accepted: 02/21/2014] [Indexed: 12/21/2022]
Abstract
Since Notch phenotypes in Drosophila melanogaster were first identified 100 years ago, Notch signaling has been extensively characterized as a regulator of cell-fate decisions in a variety of organisms and tissues. However, in the past 20 years, accumulating evidence has linked alterations in the Notch pathway to tumorigenesis. In this review, we discuss the protumorigenic and tumor-suppressive functions of Notch signaling, and dissect the molecular mechanisms that underlie these functions in hematopoietic cancers and solid tumors. Finally, we link these mechanisms and observations to possible therapeutic strategies targeting the Notch pathway in human cancers.
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Affiliation(s)
- Panagiotis Ntziachristos
- Howard Hughes Medical Institute and Department of Pathology, NYU School of Medicine, New York, NY 10016, USA; NYU Cancer Institute and Helen L. and Martin S. Kimmel Center for Stem Cell Biology, NYU School of Medicine, New York, NY 10016, USA
| | - Jing Shan Lim
- Departments of Pediatrics and Genetics, Stanford University, Stanford, CA 94305, USA
| | - Julien Sage
- Departments of Pediatrics and Genetics, Stanford University, Stanford, CA 94305, USA.
| | - Iannis Aifantis
- Howard Hughes Medical Institute and Department of Pathology, NYU School of Medicine, New York, NY 10016, USA; NYU Cancer Institute and Helen L. and Martin S. Kimmel Center for Stem Cell Biology, NYU School of Medicine, New York, NY 10016, USA.
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Ivanov AI. Pharmacological inhibitors of exocytosis and endocytosis: novel bullets for old targets. Methods Mol Biol 2014; 1174:3-18. [PMID: 24947371 DOI: 10.1007/978-1-4939-0944-5_1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Pharmacological inhibitors of vesicle trafficking possess great promise as valuable analytical tools for the study of a variety of biological processes and as potential therapeutic agents to fight microbial infections and cancer. However, many commonly used trafficking inhibitors are characterized by poor selectivity that diminishes their use in solving basic problems of cell biology or drug development. Recent high-throughput chemical screens intensified the search for novel modulators of vesicle trafficking, and successfully identified a number of small molecules that inhibit exocytosis and endocytosis in different types of mammalian cells. This chapter provides a systematic overview of recently discovered inhibitors of vesicle trafficking. It describes cellular effects and mechanisms of action of novel inhibitors of exocytosis and endocytosis. Furthermore, it pays special attention to the selectivity and possible off-target effects of these inhibitors.
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Affiliation(s)
- Andrei I Ivanov
- Department of Human and Molecular Genetics, VCU Institute of Molecular Medicine, Virginia Commonwealth University, Goodwin Laboratory, 401 College Street, 980035, Richmond, VA, 23298, USA,
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