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Kobiita A, Silva PN, Schmid MW, Stoffel M. FoxM1 coordinates cell division, protein synthesis, and mitochondrial activity in a subset of β cells during acute metabolic stress. Cell Rep 2023; 42:112986. [PMID: 37590136 DOI: 10.1016/j.celrep.2023.112986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 06/06/2023] [Accepted: 07/31/2023] [Indexed: 08/19/2023] Open
Abstract
Pancreatic β cells display functional and transcriptional heterogeneity in health and disease. The sequence of events leading to β cell heterogeneity during metabolic stress is poorly understood. Here, we characterize β cell responses to early metabolic stress in vivo by employing RNA sequencing (RNA-seq), assay for transposase-accessible chromatin with sequencing (ATAC-seq), single-cell RNA-seq (scRNA-seq), chromatin immunoprecipitation sequencing (ChIP-seq), and real-time imaging to decipher temporal events of chromatin remodeling and gene expression regulating the unfolded protein response (UPR), protein synthesis, mitochondrial function, and cell-cycle progression. We demonstrate that a subpopulation of β cells with active UPR, decreased protein synthesis, and insulin secretary capacities is more susceptible to proliferation after insulin depletion. Alleviation of endoplasmic reticulum (ER) stress precedes the progression of the cell cycle and mitosis and ensures appropriate insulin synthesis. Furthermore, metabolic stress rapidly activates key transcription factors including FoxM1, which impacts on proliferative and quiescent β cells by regulating protein synthesis, ER stress, and mitochondrial activity via direct repression of mitochondrial-encoded genes.
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Affiliation(s)
- Ahmad Kobiita
- Institute of Molecular Health Sciences, ETH Zürich, Otto-Stern-Weg 7, 8093 Zürich, Switzerland
| | - Pamuditha N Silva
- Institute of Molecular Health Sciences, ETH Zürich, Otto-Stern-Weg 7, 8093 Zürich, Switzerland
| | - Marc W Schmid
- MWSchmid GmbH, Hauptstrasse 34, 8750 Glarus, Switzerland
| | - Markus Stoffel
- Institute of Molecular Health Sciences, ETH Zürich, Otto-Stern-Weg 7, 8093 Zürich, Switzerland; Medical Faculty, Universitäts-Spital Zürich, Rämistrasse 100, 8091 Zürich, Switzerland.
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2
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Marcinkevics R, Silva PN, Hankele AK, Dörnte C, Kadelka S, Csik K, Godbersen S, Goga A, Hasenöhrl L, Hirschi P, Kabakci H, LaPierre MP, Mayrhofer J, Title AC, Shu X, Baiioud N, Bernal S, Dassisti L, Saenz-de-Juano MD, Schmidhauser M, Silvestrelli G, Ulbrich SZ, Ulbrich TJ, Wyss T, Stekhoven DJ, Al-Quaddoomi FS, Yu S, Binder M, Schultheiβ C, Zindel C, Kolling C, Goldhahn J, Seighalani BK, Zjablovskaja P, Hardung F, Schuster M, Richter A, Huang YJ, Lauer G, Baurmann H, Low JS, Vaqueirinho D, Jovic S, Piccoli L, Ciesek S, Vogt JE, Sallusto F, Stoffel M, Ulbrich SE. Machine learning analysis of humoral and cellular responses to SARS-CoV-2 infection in young adults. Front Immunol 2023; 14:1158905. [PMID: 37313411 PMCID: PMC10258347 DOI: 10.3389/fimmu.2023.1158905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 05/09/2023] [Indexed: 06/15/2023] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) induces B and T cell responses, contributing to virus neutralization. In a cohort of 2,911 young adults, we identified 65 individuals who had an asymptomatic or mildly symptomatic SARS-CoV-2 infection and characterized their humoral and T cell responses to the Spike (S), Nucleocapsid (N) and Membrane (M) proteins. We found that previous infection induced CD4 T cells that vigorously responded to pools of peptides derived from the S and N proteins. By using statistical and machine learning models, we observed that the T cell response highly correlated with a compound titer of antibodies against the Receptor Binding Domain (RBD), S and N. However, while serum antibodies decayed over time, the cellular phenotype of these individuals remained stable over four months. Our computational analysis demonstrates that in young adults, asymptomatic and paucisymptomatic SARS-CoV-2 infections can induce robust and long-lasting CD4 T cell responses that exhibit slower decays than antibody titers. These observations imply that next-generation COVID-19 vaccines should be designed to induce stronger cellular responses to sustain the generation of potent neutralizing antibodies.
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Affiliation(s)
| | | | | | - Charlyn Dörnte
- Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
| | - Sarah Kadelka
- Institute of Integrative Biology, ETH Zurich, Zurich, Switzerland
| | - Katharina Csik
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Svenja Godbersen
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Algera Goga
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Lynn Hasenöhrl
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Pascale Hirschi
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Hasan Kabakci
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Mary P. LaPierre
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Johanna Mayrhofer
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Xuan Shu
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Nouell Baiioud
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Sandra Bernal
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Laura Dassisti
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Meret Schmidhauser
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Giulia Silvestrelli
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Simon Z. Ulbrich
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Thea J. Ulbrich
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Tamara Wyss
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
| | - Daniel J. Stekhoven
- NEXUS Personalized Health Technologies, Zurich & SIB Swiss Institute of Bioinformatics, ETH Zurich, Lausanne, Switzerland
| | - Faisal S. Al-Quaddoomi
- NEXUS Personalized Health Technologies, Zurich & SIB Swiss Institute of Bioinformatics, ETH Zurich, Lausanne, Switzerland
| | - Shuqing Yu
- NEXUS Personalized Health Technologies, Zurich & SIB Swiss Institute of Bioinformatics, ETH Zurich, Lausanne, Switzerland
| | - Mascha Binder
- Department of Internal Medicine IV, Oncology/Hematology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Christoph Schultheiβ
- Department of Internal Medicine IV, Oncology/Hematology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Claudia Zindel
- Department of Health Science, Translational Medicine, ETH Zurich, Zurich, Switzerland
| | - Christoph Kolling
- Department of Health Science, Translational Medicine, ETH Zurich, Zurich, Switzerland
| | - Jörg Goldhahn
- Department of Health Science, Translational Medicine, ETH Zurich, Zurich, Switzerland
| | | | | | - Frank Hardung
- Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
| | - Marc Schuster
- Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
| | - Anne Richter
- Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
| | - Yi-Ju Huang
- Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
| | - Gereon Lauer
- Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
| | | | - Jun Siong Low
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Daniela Vaqueirinho
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Sandra Jovic
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
| | - Luca Piccoli
- Humabs BioMed SA, a Subsidiary of Vir Biotechnology, Bellinzona, Switzerland
| | - Sandra Ciesek
- Institute of Medical Virology, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Julia E. Vogt
- Department of Computer Science, ETH Zurich, Zurich, Switzerland
| | - Federica Sallusto
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona, Switzerland
- Medical Immunology, Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Markus Stoffel
- Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
- University Hospital Zurich, Zurich, Switzerland
| | - Susanne E. Ulbrich
- Animal Physiology, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland
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Ge W, Goga A, He Y, Silva PN, Hirt CK, Herrmanns K, Guccini I, Godbersen S, Schwank G, Stoffel M. miR-802 Suppresses Acinar-to-Ductal Reprogramming During Early Pancreatitis and Pancreatic Carcinogenesis. Gastroenterology 2022; 162:269-284. [PMID: 34547282 DOI: 10.1053/j.gastro.2021.09.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 08/25/2021] [Accepted: 09/14/2021] [Indexed: 01/20/2023]
Abstract
BACKGROUND & AIMS Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive tumor that is almost uniformly lethal in humans. Activating mutations of KRAS are found in >90% of human PDACs and are sufficient to promote acinar-to-ductal metaplasia (ADM) during tumor initiation. The roles of miRNAs in oncogenic Kras-induced ADM are incompletely understood. METHODS The Ptf1aCre/+LSL-KrasG12D/+ and Ptf1aCre/+LSL-KrasG12D/+LSL-p53R172H/+ and caerulein-induced acute pancreatitis mice models were used. mir-802 was conditionally ablated in acinar cells to study the function of miR-802 in ADM. RESULTS We show that miR-802 is a highly abundant and acinar-enriched pancreatic miRNA that is silenced during early stages of injury or oncogenic KrasG12D-induced transformation. Genetic ablation of mir-802 cooperates with KrasG12D by promoting ADM formation. miR-802 deficiency results in de-repression of the miR-802 targets Arhgef12, RhoA, and Sdc4, activation of RhoA, and induction of the downstream RhoA effectors ROCK1, LIMK1, COFILIN1, and EZRIN, thereby increasing F-actin rearrangement. mir-802 ablation also activates SOX9, resulting in augmented levels of ductal and attenuated expression of acinar identity genes. Consistently with these findings, we show that this miR-802-RhoA-F-actin network is activated in biopsies of pancreatic cancer patients and correlates with poor survival. CONCLUSIONS We show miR-802 suppresses pancreatic cancer initiation by repressing oncogenic Kras-induced ADM. The role of miR-802 in ADM fills the gap in our understanding of oncogenic Kras-induced F-actin reorganization, acinar reprogramming, and PDAC initiation. Modulation of the miR-802-RhoA-F-actin network may be a new strategy to interfere with pancreatic carcinogenesis.
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Affiliation(s)
- Wenjie Ge
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Algera Goga
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Yuliang He
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, Zürich, Switzerland
| | - Pamuditha N Silva
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | | | - Karolin Herrmanns
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Ilaria Guccini
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Svenja Godbersen
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland
| | - Gerald Schwank
- Institute of Pharmacology and Toxicology, University of Zürich, Zürich, Switzerland
| | - Markus Stoffel
- Institute of Molecular Health Sciences, ETH Zürich, Zürich, Switzerland; Medical Faculty, University of Zürich, Zürich, Switzerland.
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Title AC, Silva PN, Godbersen S, Hasenöhrl L, Stoffel M. The miR-200-Zeb1 axis regulates key aspects of β-cell function and survival in vivo. Mol Metab 2021; 53:101267. [PMID: 34116231 PMCID: PMC8258987 DOI: 10.1016/j.molmet.2021.101267] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/24/2021] [Accepted: 06/03/2021] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE The miR-200-Zeb1 axis regulates the epithelial-to-mesenchymal transition (EMT), differentiation, and resistance to apoptosis. A better understanding of these processes in diabetes is highly relevant, as β-cell dedifferentiation and apoptosis contribute to the loss of functional β-cell mass and diabetes progression. Furthermore, EMT promotes the loss of β-cell identity in the in vitro expansion of human islets. Though the miR-200 family has previously been identified as a regulator of β-cell apoptosis in vivo, studies focusing on Zeb1 are lacking. The aim of this study was thus to investigate the role of Zeb1 in β-cell function and survival in vivo. METHODS miR-200 and Zeb1 are involved in a double-negative feedback loop. We characterized a mouse model in which miR-200 binding sites in the Zeb1 3'UTR are mutated (Zeb1200), leading to a physiologically relevant upregulation of Zeb1 mRNA expression. The role of Zeb1 was investigated in this model via metabolic tests and analysis of isolated islets. Further insights into the distinct contributions of the miR-200 and Zeb1 branches of the feedback loop were obtained by crossing the Zeb1200 allele into a background of miR-141-200c overexpression. RESULTS Mild Zeb1 derepression in vivo led to broad transcriptional changes in islets affecting β-cell identity, EMT, insulin secretion, cell-cell junctions, the unfolded protein response (UPR), and the response to ER stress. The aggregation and insulin secretion of dissociated islets of mice homozygous for the Zeb1200 mutation (Zeb1200M) were impaired, and Zeb1200M islets were resistant to thapsigargin-induced ER stress ex vivo. Zeb1200M mice had increased circulating proinsulin levels but no overt metabolic phenotype, reflecting the strong compensatory ability of islets to maintain glucose homeostasis. CONCLUSIONS This study signifies the importance of the miR-200-Zeb1 axis in regulating key aspects of β-cell function and survival. A better understanding of this axis is highly relevant in developing therapeutic strategies for inducing β-cell redifferentiation and maintaining β-cell identity in in vitro islet expansion.
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Affiliation(s)
- Alexandra C Title
- Institute of Molecular Health Sciences (IMHS), ETH Zürich, Otto-Stern-Weg 7, 8093, Zürich, Switzerland; Competence Center Personalized Medicine, ETH Zürich, Voltastrasse 24, 8044, Zürich, Switzerland
| | - Pamuditha N Silva
- Institute of Molecular Health Sciences (IMHS), ETH Zürich, Otto-Stern-Weg 7, 8093, Zürich, Switzerland
| | - Svenja Godbersen
- Institute of Molecular Health Sciences (IMHS), ETH Zürich, Otto-Stern-Weg 7, 8093, Zürich, Switzerland
| | - Lynn Hasenöhrl
- Institute of Molecular Health Sciences (IMHS), ETH Zürich, Otto-Stern-Weg 7, 8093, Zürich, Switzerland
| | - Markus Stoffel
- Institute of Molecular Health Sciences (IMHS), ETH Zürich, Otto-Stern-Weg 7, 8093, Zürich, Switzerland; Competence Center Personalized Medicine, ETH Zürich, Voltastrasse 24, 8044, Zürich, Switzerland; Medical Faculty, University of Zürich, 8091, Zürich, Switzerland.
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5
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Mayers S, Moço PD, Maqbool T, Silva PN, Kilkenny DM, Audet J. Establishment of an erythroid progenitor cell line capable of enucleation achieved with an inducible c-Myc vector. BMC Biotechnol 2019; 19:21. [PMID: 30987611 PMCID: PMC6466758 DOI: 10.1186/s12896-019-0515-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 04/05/2019] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND A robust scalable method for producing enucleated red blood cells (RBCs) is not only a process to produce packed RBC units for transfusion but a potential platform to produce modified RBCs with applications in advanced cellular therapy. Current strategies for producing RBCs have shortcomings in the limited self-renewal capacity of progenitor cells, or difficulties in effectively enucleating erythroid cell lines. We explored a new method to produce RBCs by inducibly expressing c-Myc in primary erythroid progenitor cells and evaluated the proliferative and maturation potential of these modified cells. RESULTS Primary erythroid progenitor cells were genetically modified with an inducible gene transfer vector expressing a single transcription factor, c-Myc, and all the gene elements required to achieve dox-inducible expression. Genetically modified cells had enhanced proliferative potential compared to control cells, resulting in exponential growth for at least 6 weeks. Inducibly proliferating erythroid (IPE) cells were isolated with surface receptors similar to colony forming unit-erythroid (CFU-Es), and after removal of ectopic c-Myc expression cells hemoglobinized, decreased in cell size to that of native RBCs, and enucleated achieving cultures with 17% enucleated cells. Experiments with IPE cells at various levels of ectopic c-Myc expression provided insight into differentiation dynamics of the modified cells, and an optimized two-stage differentiation strategy was shown to promote greater expansion and maturation. CONCLUSIONS Genetic engineering of adult erythroid progenitor cells with an inducible c-Myc vector established an erythroid progenitor cell line that could produce RBCs, demonstrating the potential of this approach to produce large quantities of RBCs and modified RBC products.
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Affiliation(s)
- Steven Mayers
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada.,Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Toronto, Canada
| | - Pablo Diego Moço
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Toronto, Canada
| | - Talha Maqbool
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Toronto, Canada
| | - Pamuditha N Silva
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Toronto, Canada
| | - Dawn M Kilkenny
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Toronto, Canada
| | - Julie Audet
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada. .,Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, Toronto, Canada.
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6
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Regeenes R, Silva PN, Chang HH, Arany EJ, Shukalyuk AI, Audet J, Kilkenny DM, Rocheleau JV. Fibroblast growth factor receptor 5 (FGFR5) is a co-receptor for FGFR1 that is up-regulated in beta-cells by cytokine-induced inflammation. J Biol Chem 2018; 293:17218-17228. [PMID: 30217817 DOI: 10.1074/jbc.ra118.003036] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 09/10/2018] [Indexed: 11/06/2022] Open
Abstract
Fibroblast growth factor receptor-1 (FGFR1) activity at the plasma membrane is tightly controlled by the availability of co-receptors and competing receptor isoforms. We have previously shown that FGFR1 activity in pancreatic beta-cells modulates a wide range of processes, including lipid metabolism, insulin processing, and cell survival. More recently, we have revealed that co-expression of FGFR5, a receptor isoform that lacks a tyrosine-kinase domain, influences FGFR1 responses. We therefore hypothesized that FGFR5 is a co-receptor to FGFR1 that modulates responses to ligands by forming a receptor heterocomplex with FGFR1. We first show here increased FGFR5 expression in the pancreatic islets of nonobese diabetic (NOD) mice and also in mouse and human islets treated with proinflammatory cytokines. Using siRNA knockdown, we further report that FGFR5 and FGFR1 expression improves beta-cell survival. Co-immunoprecipitation and quantitative live-cell imaging to measure the molecular interaction between FGFR5 and FGFR1 revealed that FGFR5 forms a mixture of ligand-independent homodimers (∼25%) and homotrimers (∼75%) at the plasma membrane. Interestingly, co-expressed FGFR5 and FGFR1 formed heterocomplexes with a 2:1 ratio and subsequently responded to FGF2 by forming FGFR5/FGFR1 signaling complexes with a 4:2 ratio. Taken together, our findings identify FGFR5 as a co-receptor that is up-regulated by inflammation and promotes FGFR1-induced survival, insights that reveal a potential target for intervention during beta-cell pathogenesis.
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Affiliation(s)
- Romario Regeenes
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9
| | - Pamuditha N Silva
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9
| | - Huntley H Chang
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9
| | - Edith J Arany
- the Department of Pathology and Laboratory Medicine, Western University, London, Ontario N6A 3K7.,the Lawson Health Research Institute, St. Joseph's Health Care, London, Ontario N6A 6K1
| | - Andrey I Shukalyuk
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9
| | - Julie Audet
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9.,the Department of Chemical Engineering, University of Toronto, Toronto, Ontario M5S 3E5
| | - Dawn M Kilkenny
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9
| | - Jonathan V Rocheleau
- From the Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, .,the Department of Physiology, University of Toronto, Toronto, Ontario M5S 3H7, and.,the Toronto General Research Institute, University Health Network, Toronto, Ontario M5G 2C4, Canada
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7
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Green BJ, Kermanshah L, Labib M, Ahmed SU, Silva PN, Mahmoudian L, Chang IH, Mohamadi RM, Rocheleau JV, Kelley SO. Isolation of Phenotypically Distinct Cancer Cells Using Nanoparticle-Mediated Sorting. ACS Appl Mater Interfaces 2017; 9:20435-20443. [PMID: 28548481 DOI: 10.1021/acsami.7b05253] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Isolating subpopulations of heterogeneous cancer cells is an important capability for the meaningful characterization of circulating tumor cells at different stages of tumor progression and during the epithelial-to-mesenchymal transition. Here, we present a microfluidic device that can separate phenotypically distinct subpopulations of cancer cells. Magnetic nanoparticles coated with antibodies against the epithelial cell adhesion molecule (EpCAM) are used to separate breast cancer cells in the microfluidic platform. Cells are sorted into different zones on the basis of the levels of EpCAM expression, which enables the detection of cells that are losing epithelial character and becoming more mesenchymal. The phenotypic properties of the isolated cells with low and high EpCAM are then assessed using matrix-coated surfaces for collagen uptake analysis, and an NAD(P)H assay that assesses metabolic activity. We show that low-EpCAM expressing cells have higher collagen uptake and higher folate-induced NAD(P)H responses compared to those of high-EpCAM expressing cells. In addition, we tested SKBR3 cancer cells undergoing chemically induced hypoxia. The induced cells have reduced expression of EpCAM, and we find that these cells have higher collagen uptake and NAD(P)H metabolism relative to noninduced cells. This work demonstrates that nanoparticle-mediated binning facilitates the isolation of functionally distinct cell subpopulations and allows surface marker expression to be associated with invasiveness, including collagen uptake and metabolic activity.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Shana O Kelley
- Department of Biochemistry, Faculty of Medicine, University of Toronto , Toronto M5S 1A8, Canada
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8
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Filippi BM, Abraham MA, Silva PN, Rasti M, LaPierre MP, Bauer PV, Rocheleau JV, Lam TK. Dynamin-Related Protein 1-Dependent Mitochondrial Fission Changes in the Dorsal Vagal Complex Regulate Insulin Action. Cell Rep 2017; 18:2301-2309. [DOI: 10.1016/j.celrep.2017.02.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 01/26/2017] [Accepted: 02/11/2017] [Indexed: 11/25/2022] Open
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Silva PN, Atto Z, Regeenes R, Tufa U, Chen YY, Chan WCW, Volchuk A, Kilkenny DM, Rocheleau JV. Highly efficient adenoviral transduction of pancreatic islets using a microfluidic device. Lab Chip 2016; 16:2921-2934. [PMID: 27378588 DOI: 10.1039/c6lc00345a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Tissues are challenging to genetically manipulate due to limited penetration of viral particles resulting in low transduction efficiency. We are particularly interested in expressing genetically-encoded sensors in ex vivo pancreatic islets to measure glucose-stimulated metabolism, however poor viral penetration biases these measurements to only a subset of cells at the periphery. To increase mass transfer of viral particles, we designed a microfluidic device that holds islets in parallel hydrodynamic traps connected by an expanding by-pass channel. We modeled viral particle flow into the tissue using fluorescently-labelled gold nanoparticles of varying sizes and showed a penetration threshold of only ∼5 nm. To increase this threshold, we used EDTA to transiently reduce cell-cell adhesion and expand intercellular space. Ultimately, a combination of media flow and ETDA treatment significantly increased adenoviral transduction to the core of the islet. As proof-of-principle, we used this protocol to transduce an ER-targeted redox sensitive sensor (eroGFP), and revealed significantly greater ER redox capacity at core islet cells. Overall, these data demonstrate a robust method to enhance transduction efficiency of islets, and potentially other tissues, by using a combination of microfluidic flow and transient tissue expansion.
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Affiliation(s)
- Pamuditha N Silva
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College St., Toronto, Ontario M5S 3G9, Canada.
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10
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Nosak C, Silva PN, Sollazzo P, Moon KM, Odisho T, Foster LJ, Rocheleau JV, Volchuk A. Jagn1 Is Induced in Response to ER Stress and Regulates Proinsulin Biosynthesis. PLoS One 2016; 11:e0149177. [PMID: 26882284 PMCID: PMC4755616 DOI: 10.1371/journal.pone.0149177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 12/26/2015] [Indexed: 11/19/2022] Open
Abstract
The Jagn1 protein was indentified in a SILAC proteomic screen of proteins that are increased in insulinoma cells expressing a folding-deficient proinsulin. Jagn1 mRNA was detected in primary rodent islets and in insulinoma cell lines and the levels were increased in response to ER stress. The function of Jagn1 was assessed in insulinoma cells by both knock-down and overexpression approaches. Knock-down of Jagn1 caused an increase in glucose-stimulated insulin secretion resulting from an increase in proinsulin biosynthesis. In contrast, overexpression of Jagn1 in insulinoma cells resulted in reduced cellular proinsulin and insulin levels. Our results identify a novel role for Jagn1 in regulating proinsulin biosynthesis in pancreatic β-cells. Under ER stress conditions Jagn1 is induced which might contribute to reducing proinsulin biosynthesis, in part by helping to relieve the protein folding load in the ER in an effort to restore ER homeostasis.
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Affiliation(s)
- Courtney Nosak
- Department of Physiology, University of Toronto, Toronto, Canada
| | - Pamuditha N. Silva
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada
| | - Pietro Sollazzo
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Kyung-Mee Moon
- Department of Biochemistry & Molecular Biology and Centre for High-Throughput Biology, University of British Columbia, Vancouver, Canada
| | - Tanya Odisho
- Department of Physiology, University of Toronto, Toronto, Canada
| | - Leonard J. Foster
- Department of Biochemistry & Molecular Biology and Centre for High-Throughput Biology, University of British Columbia, Vancouver, Canada
| | - Jonathan V. Rocheleau
- Department of Physiology, University of Toronto, Toronto, Canada
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada
| | - Allen Volchuk
- Keenan Research Centre of the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Canada
- * E-mail:
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11
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Silva PN, Regeenes R, Atto Z, Tufa U, Yang Chen Y, Volchuk A, Kilkenny DM, Rocheleau JV. Heat-on-a-Chip: A Microfluidic Device for Highly Efficient Adenoviral Transduction of EX Vivo Pancreatic Islets. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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12
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Silva PN, Regeenes R, Wang NK, Kilkenny DM, Rocheleau JV. Quantitative Fluorescence Microscopy Reveals Fibroblast Growth Factor Receptor 5 Signaling Complex Formation. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.2010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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13
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Cameron WD, Bui CV, Silva PN, Rocheleau JV. The Design of an NADP+-Biosensor Based on Changes in Intermolecular Homofret of Glucose-6-Phosphate Dehydrogenase. Biophys J 2015. [DOI: 10.1016/j.bpj.2014.11.1789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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14
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Silva PN, Green BJ, Altamentova SM, Rocheleau JV. A microfluidic device designed to induce media flow throughout pancreatic islets while limiting shear-induced damage. Lab Chip 2013; 13:4374-4384. [PMID: 24056576 DOI: 10.1039/c3lc50680k] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Pancreatic islets are heavily vascularized in vivo with fenestrated endothelial cells (ECs) to facilitate blood glucose-sensing and endocrine hormone secretion. The close proximity of insulin secreting beta cells and ECs also plays a critical role in modulating the proliferation and survival of both cell types with the mechanisms governing this interaction poorly understood. Isolated islets lose EC morphology and mass over a period of days in culture prohibiting study of this interaction in vitro. The loss of ECs also limits the efficacy of islet transplant revascularization in the treatment of Type 1 diabetes. We previously showed that microfluidically driven flow positively affects beta-cell function and EC survival in culture due to enhanced transport of media into the tissue. However, holding islets stationary in media flow using a dam-wall design also resulted in reduced glucose-stimulated metabolic and Ca(2+) responses at the periphery of the tissue consistent with shear-induced damage. We have now created a device that traps islets into sequential cup-shaped nozzles. This hydrodynamic trap design limits flow velocity around the perimeter of the islet while enhancing media flow through the tissue. We demonstrate the feasibility of this device to dynamically treat and collect effluent from islets. We further show that treating islets in this device enhances EC morphology without reducing glucose-stimulate Ca(2+) responses. These data reveal a microfluidic device to study EC and endocrine cell interaction that can be further leveraged to prime islets prior to transplantation.
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Affiliation(s)
- Pamuditha N Silva
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada.
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15
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Silva PN, Altamentova SM, Kilkenny DM, Rocheleau JV. Fibroblast growth factor receptor like-1 (FGFRL1) interacts with SHP-1 phosphatase at insulin secretory granules and induces beta-cell ERK1/2 protein activation. J Biol Chem 2013; 288:17859-70. [PMID: 23640895 DOI: 10.1074/jbc.m112.440677] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
FGFRL1 is a newly identified member of the fibroblast growth factor receptor (FGFR) family expressed in adult pancreas. Unlike canonical FGFRs that initiate signaling via tyrosine kinase domains, the short intracellular sequence of FGFRL1 consists of a putative Src homology domain-2 (SH2)-binding motif adjacent to a histidine-rich C terminus. As a consequence of nonexistent kinase domains, FGFRL1 has been postulated to act as a decoy receptor to inhibit canonical FGFR ligand-induced signaling. In pancreatic islet beta-cells, canonical FGFR1 signaling affects metabolism and insulin processing. This study determined beta-cell expression of FGFRL1 as well as consequent effects on FGFR1 signaling and biological responses. We confirmed FGFRL1 expression at the plasma membrane and within distinct intracellular granules of both primary beta-cells and βTC3 cells. Fluorescent protein-tagged FGFRL1 (RL1) induced a significant ligand-independent increase in MAPK signaling. Removal of the histidine-rich domain (RL1-ΔHis) or entire intracellular sequence (RL1-ΔC) resulted in greater retention at the plasma membrane and significantly reduced ligand-independent ERK1/2 responses. The SHP-1 phosphatase was identified as an RL1-binding substrate. Point mutation of the SH2-binding motif reduced the ability of FGFRL1 to bind SHP-1 and activate ERK1/2 but did not affect receptor localization to insulin secretory granules. Finally, overexpression of RL1 increased cellular insulin content and matrix adhesion. Overall, these data suggest that FGFRL1 does not function as a decoy receptor in beta-cells, but rather it enhances ERK1/2 signaling through association of SHP-1 with the receptor's intracellular SH2-binding motif.
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Affiliation(s)
- Pamuditha N Silva
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
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Silva PN, Kilkenny DM, Rocheleau JV. Revealing the Relationship between Fibroblast Growth Factor Receptor-Like 1 (FGFRL1) and Free Zinc in Pancreatic Beta-Cells using Quantitative Fluorescence Microscopy. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.3380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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17
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Lam AK, Silva PN, Altamentova SM, Rocheleau JV. Quantitative imaging of electron transfer flavoprotein autofluorescence reveals the dynamics of lipid partitioning in living pancreatic islets. Integr Biol (Camb) 2012; 4:838-46. [PMID: 22733276 DOI: 10.1039/c2ib20075a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Pancreatic islet β-cells metabolically sense nutrients to maintain blood glucose homeostasis through the regulated secretion of insulin. Long-term exposure to a mixed supply of excess glucose and fatty acids induces β-cell dysfunction and type II diabetes in a process termed glucolipotoxicity. Despite a number of documented mechanisms for glucolipotoxicity, the interplay between glucose and fatty acid oxidation in islets remains debated. Here, we develop confocal imaging of electron transfer flavoprotein (ETF) autofluorescence to reveal the dynamics of fatty acid oxidation in living pancreatic islets. This method further integrates microfluidic devices to hold the islets stationary in flow, and thus achieve ETF imaging in the β-cells with high spatial and temporal resolution. Our data first confirm that ETF autofluorescence reflects electron transport chain (ETC) activity downstream of Complex I, consistent with a response directly related to fatty acid metabolism. Together with two-photon imaging of NAD(P)H and confocal imaging of lipoamide dehydrogenase (LipDH) autofluorescence, we show that the ETC predominantly draws electrons from LipDH/NADH-dependent Complex I rather than from ETF/FADH(2)-dependent ETF:CoQ oxidoreductase (ETF-QO). Islets stimulated with palmitate also show increased ETF redox state that is dose-dependently diminished by glucose (>10 mM). Furthermore, stimulation with a glucose bolus causes a two-tier drop in the ETF redox state at ∼5 and ∼20 min, suggesting glucose metabolism immediately increases ETC activity and later decreases fatty acid oxidation. Our results demonstrate the utility of ETF imaging in characterizing fatty acid-induced redox responses with high subcellular and temporal resolution. Our results further demonstrate a dominant role of glucose metabolism over fatty acid oxidation in β-cells even when presented with a mixed nutrient condition associated with glucolipotoxicity.
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Affiliation(s)
- Alan K Lam
- Institute of Biomaterials and Biomedical Engineering, Toronto, ON Canada
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18
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de Magalhães JC, Andrade AA, Silva PN, Sousa LP, Ropert C, Ferreira PC, Kroon EG, Gazzinelli RT, Bonjardim CA. A mitogenic signal triggered at an early stage of vaccinia virus infection: implication of MEK/ERK and protein kinase A in virus multiplication. J Biol Chem 2001; 276:38353-60. [PMID: 11459835 DOI: 10.1074/jbc.m100183200] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Vaccinia virus (VV) triggers a mitogenic signal at an early stage of infection. VV-induced proto-oncogene c-fos mRNA with kinetics paralleling that stimulated by serum. The VV virokine, or vaccinia virus growth factor (VGF), was not crucial for c-fos induction because it was observed upon infection with the virokine-minus mutant VV (VGF(-)). Furthermore, c-fos expression did not require infectious virus particles, as it occurred even with UV-inactivated VV and was equally induced by the different multiplicities of infection, i.e. 1.0, 5.0, and 25.0. c-fos expression was preceded by VV-induced DNA binding activity and was mediated via the cis-acting elements serum response element (SRE), activating protein-1 (AP-1), and cAMP-response element (CRE). VV activated the protein kinases p42MAPK/ERK2 and p44MAPK/ERK1 and the transcription factor ATF1 in a time-dependent manner with kinetics that paralleled those of VV-stimulated DNA-protein complex formation. The mitogenic signal transmission pathways leading to c-fos activation upon VV infection were apparently mediated by the protein kinases MEK, ERK, and PKA. This assumption was based on the findings that: 1) c-fos transcript was down-regulated; 2) the SRE, AP-1, and CRE binding activities were significantly reduced; and 3) the activation of p42MAPK/ERK2, p44MAPK/ERK1, and ATF1 were drastically affected when the viral infections were carried out in the presence of specific protein kinase inhibitor. Moreover, the mutant VV (VGF(-)) was also able to activate ERK1/2. It is noteworthy that virus multiplication was equally affected by the same kinase inhibitors. Taken together, our data provide evidence that the early mitogenic signal triggered upon VV infection relies upon the activation of the protein kinases MEK, ERK, and PKA, which are needed for both signal transduction and virus multiplication.
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Affiliation(s)
- J C de Magalhães
- Laboratório de Virus-Grupo de Transdução de Sinal, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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