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Landor SKJ, Santio NM, Eccleshall WB, Paramonov VM, Gagliani EK, Hall D, Jin SB, Dahlström KM, Salminen TA, Rivero-Müller A, Lendahl U, Kovall RA, Koskinen PJ, Sahlgren C. PIM-induced phosphorylation of Notch3 promotes breast cancer tumorigenicity in a CSL-independent fashion. J Biol Chem 2021; 296:100593. [PMID: 33775697 PMCID: PMC8100066 DOI: 10.1016/j.jbc.2021.100593] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 03/19/2021] [Accepted: 03/24/2021] [Indexed: 12/29/2022] Open
Abstract
Dysregulation of the developmentally important Notch signaling pathway is implicated in several types of cancer, including breast cancer. However, the specific roles and regulation of the four different Notch receptors have remained elusive. We have previously reported that the oncogenic PIM kinases phosphorylate Notch1 and Notch3. Phosphorylation of Notch1 within the second nuclear localization sequence of its intracellular domain (ICD) enhances its transcriptional activity and tumorigenicity. In this study, we analyzed Notch3 phosphorylation and its functional impact. Unexpectedly, we observed that the PIM target sites are not conserved between Notch1 and Notch3. Notch3 ICD (N3ICD) is phosphorylated within a domain, which is essential for formation of a transcriptionally active complex with the DNA-binding protein CSL. Through molecular modeling, X-ray crystallography, and isothermal titration calorimetry, we demonstrate that phosphorylation of N3ICD sterically hinders its interaction with CSL and thereby inhibits its CSL-dependent transcriptional activity. Surprisingly however, phosphorylated N3ICD still maintains tumorigenic potential in breast cancer cells under estrogenic conditions, which support PIM expression. Taken together, our data indicate that PIM kinases modulate the signaling output of different Notch paralogs by targeting distinct protein domains and thereby promote breast cancer tumorigenesis via both CSL-dependent and CSL-independent mechanisms.
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Affiliation(s)
- Sebastian K J Landor
- Faculty of Science and Engineering/Cell Biology, Åbo Akademi University, Turku, Finland; Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland
| | - Niina M Santio
- Department of Biology, University of Turku, Turku, Finland
| | - William B Eccleshall
- Faculty of Science and Engineering/Cell Biology, Åbo Akademi University, Turku, Finland; Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland; Department of Biology, University of Turku, Turku, Finland
| | - Valeriy M Paramonov
- Faculty of Science and Engineering/Cell Biology, Åbo Akademi University, Turku, Finland; Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland; Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Turku, Finland
| | - Ellen K Gagliani
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Ohio, USA
| | - Daniel Hall
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Ohio, USA
| | - Shao-Bo Jin
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
| | - Käthe M Dahlström
- Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi, Turku, Finland
| | - Tiina A Salminen
- Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi, Turku, Finland
| | - Adolfo Rivero-Müller
- Faculty of Science and Engineering/Cell Biology, Åbo Akademi University, Turku, Finland; Department of Biology, University of Turku, Turku, Finland
| | - Urban Lendahl
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
| | - Rhett A Kovall
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Ohio, USA
| | | | - Cecilia Sahlgren
- Faculty of Science and Engineering/Cell Biology, Åbo Akademi University, Turku, Finland; Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland; Department of Biomedical Engineering, Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands.
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Paramonov VM, Gerstenberg M, Sahlgren C, Lindén M, Rivero-Müller A. In vitro Targetability Validation of Peptide-Functionalized Mesoporous Silica Nanoparticles in the Presence of Serum Proteins. Front Chem 2020; 8:603616. [PMID: 33282845 PMCID: PMC7691633 DOI: 10.3389/fchem.2020.603616] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/12/2020] [Indexed: 11/13/2022] Open
Abstract
Demonstration of receptor-mediated targeting of nanoparticles to specific organs and/or cell types is an integral aim in many bionanomedicine development projects. However, engagement of targeted receptors with ligands on nanocarriers, which is the cornerstone of the active targeting concept, is challenging to study under biologically relevant conditions and thus often stays overlooked. In this work, we utilize an in-house established bioassay for in vitro targetability validation of mesoporous silica nanoparticles (MSNs), functionalized with high-affinity peptide ligands to somatostatin receptors via protective group chemistry, ensuring the correct orientation of the peptide's pharmacophore. We demonstrate that targeted nanoparticles, but not scrambled peptide-decorated counterparts, specifically engage the targeted receptors in living cells in culture media containing serum protein. The importance of being able to exclude false positives originating from the premature detachment of targeting peptides from the MSNs is highlighted.
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Affiliation(s)
- Valeriy M Paramonov
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Turku, Finland.,Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland.,Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Turku, Finland
| | | | - Cecilia Sahlgren
- Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland.,Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Turku, Finland.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, Netherlands
| | - Mika Lindén
- Department of Inorganic Chemistry II, Ulm University, Ulm, Germany
| | - Adolfo Rivero-Müller
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Turku, Finland.,Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
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Abstract
Detection of pertussis toxin (PTX) activity is instrumental for the development and manufacturing of pertussis vaccines. These quality and safety measures require thousands of mice annually. Here, we describe Interference in Gαi-mediated Signal Transduction (iGIST), an animal-free kinetic bioassay for detection of PTX, by measuring its effect on inhibitory G protein-coupled receptor (GPCR) signaling. PTX ADP-ribosylates inhibitory α-subunits of the heterotrimeric G proteins, thereby perturbing the inhibitory GPCR signaling. iGIST is based on HEK293 cells coexpressing a somatostatin receptor 2 (SSTR2), which is an inhibitory GPCR controllable by a high-affinity agonist octreotide; and a luminescent 3'5'-cyclic adenosine monophosphate (cAMP) probe. iGIST has a low sensitivity threshold in the pg/mL range of PTX, surpassing by 100-fold in a parallel analysis the currently used in vitro end-point technique to detect PTX, the cluster formation assay (CFA) in Chinese hamster ovary cells. iGIST also detects PTX in complex samples, i.e., a commercial PTX-toxoid-containing pertussis vaccine that was spiked with an active PTX. iGIST has an objective digital readout and is observer independent, offering prospects for automation. iGIST emerges as a promising animal-free alternative to detect PTX activity in the development and manufacturing of pertussis vaccines. iGIST is also expected to facilitate basic PTX research, including identification and characterization of novel compounds interfering with PTX.
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Affiliation(s)
- Valeriy M. Paramonov
- Institute of Biomedicine, Research Unit for Integrative Physiology and Pharmacology, University of Turku, Kiinamyllynkatu 10, FI-20520 Turku, Finland
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, FI-20520 Turku, Finland
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, FI-20500 Turku, Finland
| | - Cecilia Sahlgren
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, FI-20520 Turku, Finland
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, FI-20500 Turku, Finland
- Institute for Complex Molecular Systems, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Adolfo Rivero-Müller
- Institute of Biomedicine, Research Unit for Integrative Physiology and Pharmacology, University of Turku, Kiinamyllynkatu 10, FI-20520 Turku, Finland
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-059 Lublin, Poland
| | - Arto T. Pulliainen
- Institute of Biomedicine, Research Unit for Infection and Immunity, University of Turku, Kiinamyllynkatu 10, FI-20520 Turku, Finland
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Paramonov VM, Desai D, Kettiger H, Mamaeva V, Rosenholm JM, Sahlgren C, Rivero-Müller A. Targeting Somatostatin Receptors By Functionalized Mesoporous Silica Nanoparticles - Are We Striking Home? Nanotheranostics 2018; 2:320-346. [PMID: 30148051 PMCID: PMC6107779 DOI: 10.7150/ntno.23826] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 11/17/2017] [Accepted: 06/25/2018] [Indexed: 12/02/2022] Open
Abstract
The concept of delivering nanoformulations to desired tissues by means of targeting membrane receptors of high local abundance by ligands anchored to the nanocarrier has gained a lot of attention over the last decade. Currently, there is no unanimous opinion on whether surface functionalization of nanocarriers by targeting ligands translates into any real benefit in terms of pharmacokinetics or treatment outcomes. Having examined the published nanocarriers designed to engage with somatostatin receptors, we realized that in the majority of cases targetability claims were not supported by solid evidence of targeting ligand-targeted receptor coupling, which is the very crux of a targetability concept. Here, we present an approach to characterize targetability of mesoporous silica-based nanocarriers functionalized with ligands of somatostatin receptors. The targetability proof in our case comes from a functional assay based on a genetically-encoded cAMP probe, which allows for real-time capture of receptor activation in living cells, triggered by targeting ligands on nanoparticles. We elaborate on the development and validation of the assay, highlighting the power of proper functional tests in the characterization pipeline of targeted nanoformulations.
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Affiliation(s)
- Valeriy M Paramonov
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Finland.,Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Finland
| | - Diti Desai
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Finland
| | - Helene Kettiger
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Finland
| | - Veronika Mamaeva
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Finland.,Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Finland
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Finland
| | - Cecilia Sahlgren
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Finland.,Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Finland.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Adolfo Rivero-Müller
- Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology, University of Turku, Finland.,Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Finland.,Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Finland.,Department of Biochemistry and Molecular Biology, Medical University of Lublin, Poland
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5
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Misiorek JO, Lähdeniemi IAK, Nyström JH, Paramonov VM, Gullmets JA, Saarento H, Rivero-Müller A, Husøy T, Taimen P, Toivola DM. Keratin 8-deletion induced colitis predisposes to murine colorectal cancer enforced by the inflammasome and IL-22 pathway. Carcinogenesis 2016; 37:777-786. [PMID: 27234655 DOI: 10.1093/carcin/bgw063] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 05/12/2016] [Indexed: 12/30/2022] Open
Abstract
Keratins (K) are intermediate filament proteins important in protection from cellular stress. K8, K18 and K19 are the main components of keratin filaments in colonic epithelia but their role in intestinal diseases remains ambiguous. A function for keratins in intestinal health is supported by the K8-knock-out (K8(-/-)) mouse which manifests an early chronic ulcerative colitis-like inflammatory bowel disease and epithelial hyperproliferation. We tested whether K8(-/-) mice are more susceptible to colorectal cancer (CRC) compared to K8 wild type (K8(+/+)), and K8 heterozygote (K8(+/-)) mice showing increased proliferation but no inflammation. K8(-/-) mice did not develop CRC spontaneously, but had dramatically increased numbers of tumors in the distal colon in the azoxymethane (AOM) and Apc(Min/+) CRC models while neither K8(+/+) nor K8(+/-) mice were susceptible. Upregulation of IL-22 in combination with a complete loss of its negative regulator IL-22BP, and increased downstream STAT3-signaling in K8(-/-) and K8(-/-)Apc(Min/+) colonic epithelia confirmed that the IL-22 pathway, important in inflammation, proliferation and tissue regeneration, was activated. The nearly total loss of IL-22BP correlated with an activated inflammasome leading to increased cleaved caspase-1, and the putative IL-22BP inhibitor, IL-18, as well as a decrease in ALDH1/2. Ablation of K8 in a colorectal cancer cell line similarly resulted in increased IL-18 and decreased ALDH1/2. K8/K18 co-immunoprecipitated with pro-caspase-1, a component of the inflammasome in the colon, which suggests that keratins modulate inflammasome activity and protect the colon from inflammation and tumorigenesis. The K8-null mouse models also provide novel epithelial-derived robust colon-specific CRC models.
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Affiliation(s)
- Julia O Misiorek
- Biosciences, Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku 20520, Finland
| | - Iris A K Lähdeniemi
- Biosciences, Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku 20520, Finland
| | - Joel H Nyström
- Biosciences, Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku 20520, Finland
| | - Valeriy M Paramonov
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku 20520, Finland
- Department of Physiology, Institute of Biomedicine, University of Turku, Turku 20520, Finland
| | - Josef A Gullmets
- Biosciences, Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku 20520, Finland
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku 20520, Finland
- Department of Pathology, University of Turku and Turku University Hospital, Turku 20520, Finland
| | - Helena Saarento
- Biosciences, Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku 20520, Finland
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku 20520, Finland
| | - Adolfo Rivero-Müller
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku 20520, Finland
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin 20-093, Poland
| | - Trine Husøy
- Department of Food, Water and Cosmetics, Norwegian Institute of Public Health, Oslo 0403, Norway
| | - Pekka Taimen
- Department of Pathology, University of Turku and Turku University Hospital, Turku 20520, Finland
- MediCity Research Laboratory, University of Turku, Turku, Finland and
| | - Diana M Toivola
- Biosciences, Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku 20520, Finland
- Turku Center for Disease Modeling, University of Turku, Turku 20520, Finland
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Paramonov VM, Mamaeva V, Sahlgren C, Rivero-Müller A. Genetically-encoded tools for cAMP probing and modulation in living systems. Front Pharmacol 2015; 6:196. [PMID: 26441653 PMCID: PMC4569861 DOI: 10.3389/fphar.2015.00196] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 06/15/2015] [Accepted: 08/28/2015] [Indexed: 11/19/2022] Open
Abstract
Intracellular 3′-5′-cyclic adenosine monophosphate (cAMP) is one of the principal second messengers downstream of a manifold of signal transduction pathways, including the ones triggered by G protein-coupled receptors. Not surprisingly, biochemical assays for cAMP have been instrumental for basic research and drug discovery for decades, providing insights into cellular physiology and guiding pharmaceutical industry. However, despite impressive track record, the majority of conventional biochemical tools for cAMP probing share the same fundamental shortcoming—all the measurements require sample disruption for cAMP liberation. This common bottleneck, together with inherently low spatial resolution of measurements (as cAMP is typically analyzed in lysates of thousands of cells), underpin the ensuing limitations of the conventional cAMP assays: (1) genuine kinetic measurements of cAMP levels over time in a single given sample are unfeasible; (2) inability to obtain precise information on cAMP spatial distribution and transfer at subcellular levels, let alone the attempts to pinpoint dynamic interactions of cAMP and its effectors. At the same time, tremendous progress in synthetic biology over the recent years culminated in drastic refinement of our toolbox, allowing us not only to bypass the limitations of conventional assays, but to put intracellular cAMP life-span under tight control—something, that seemed scarcely attainable before. In this review article we discuss the main classes of modern genetically-encoded tools tailored for cAMP probing and modulation in living systems. We examine the capabilities and weaknesses of these different tools in the context of their operational characteristics and applicability to various experimental set-ups involving living cells, providing the guidance for rational selection of the best tools for particular needs.
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Affiliation(s)
- Valeriy M Paramonov
- Department of Physiology, Institute of Biomedicine, University of Turku , Turku, Finland ; Turku Center for Biotechnology, University of Turku and Åbo Akademi University , Turku, Finland
| | - Veronika Mamaeva
- Department of Clinical Science, University of Bergen , Bergen, Norway
| | - Cecilia Sahlgren
- Turku Center for Biotechnology, University of Turku and Åbo Akademi University , Turku, Finland ; Department of Biomedical Engineering, Eindhoven University of Technology , Eindhoven, Netherlands
| | - Adolfo Rivero-Müller
- Department of Physiology, Institute of Biomedicine, University of Turku , Turku, Finland ; Faculty of Natural Sciences and Technology, Åbo Akademi University , Turku, Finland ; Department of Biochemistry and Molecular Biology, Medical University of Lublin , Lublin, Poland
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Karpov VI, Dianov EM, Paramonov VM, Medvedkov OI, Bubnov MM, Semyonov SL, Vasiliev SA, Protopopov VN, Egorova ON, Hopin VF, Guryanov AN, Bachynski MP, Clements WR. Laser-diode-pumped phosphosilicate-fiber Raman laser with an output power of 1 W at 1.48 mum. Opt Lett 1999; 24:887-889. [PMID: 18073885 DOI: 10.1364/ol.24.000887] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
An all-fiber 1.48-mum generator based on a laser-diode-pumped Yb-doped double-clad laser and a cascaded Raman wavelength converter has been developed. Second-order Raman Stokes radiation was generated in a phosphosilicate-fiber resonator formed by two pairs of Bragg gratings. A slope efficiency of the Raman converter of 48% with respect to the power emitted by the double-clad Yb laser has been achieved. We obtained an output power of 1 W at a slope efficiency of 34% with respect to the laser-diode array power, with a total optical-to-optical efficiency of 23%.
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