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Piontek A, Eichner M, Zwanziger D, Beier L, Protze J, Walther W, Theurer S, Schmid KW, Führer‐Sakel D, Piontek J, Krause G. Targeting claudin-overexpressing thyroid and lung cancer by modified Clostridium perfringens enterotoxin. Mol Oncol 2020; 14:261-276. [PMID: 31825142 PMCID: PMC6998413 DOI: 10.1002/1878-0261.12615] [Citation(s) in RCA: 10] [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: 05/15/2019] [Revised: 10/22/2019] [Accepted: 12/09/2019] [Indexed: 01/04/2023] Open
Abstract
Clostridium perfringens enterotoxin (CPE) can be used to eliminate carcinoma cells that overexpress on their cell surface CPE receptors - a subset of claudins (e.g., Cldn3 and Cldn4). However, CPE cannot target tumors expressing solely CPE-insensitive claudins (such as Cldn1 and Cldn5). To overcome this limitation, structure-guided modifications were used to generate CPE variants that can strongly bind to Cldn1, Cldn2 and/or Cldn5, while maintaining the ability to bind Cldn3 and Cldn4. This enabled (a) targeting of the most frequent endocrine malignancy, namely, Cldn1-overexpressing thyroid cancer, and (b) improved targeting of the most common cancer type worldwide, non-small-cell lung cancer (NSCLC), which is characterized by high expression of several claudins, including Cldn1 and Cldn5. Different CPE variants, including the novel mutant CPE-Mut3 (S231R/S313H), were applied on thyroid cancer (K1 cells) and NSCLC (PC-9 cells) models. In vitro, CPE-Mut3, but not CPEwt, showed Cldn1-dependent binding and cytotoxicity toward K1 cells. For PC-9 cells, CPE-Mut3 improved claudin-dependent cytotoxic targeting, when compared to CPEwt. In vivo, intratumoral injection of CPE-Mut3 in xenograft models bearing K1 or PC-9 tumors induced necrosis and reduced the growth of both tumor types. Thus, directed modification of CPE enables eradication of tumor entities that cannot be targeted by CPEwt, for instance, Cldn1-overexpressing thyroid cancer by using the novel CPE-Mut3.
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Affiliation(s)
- Anna Piontek
- Leibniz‐Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Miriam Eichner
- Institute of Clinical Physiology / Nutritional Medicine, Medical DepartmentDivision of Gastroenterology, Infectiology, Rheumatology, Charitè – Universitätsmedizin BerlinGermany
| | - Denise Zwanziger
- Department of Endocrinology, Diabetes and Metabolism and Clinical Chemistry – Division of Laboratory ResearchUniversity Hospital EssenGermany
| | - Laura‐Sophie Beier
- Institute of Clinical Physiology / Nutritional Medicine, Medical DepartmentDivision of Gastroenterology, Infectiology, Rheumatology, Charitè – Universitätsmedizin BerlinGermany
| | - Jonas Protze
- Leibniz‐Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Wolfgang Walther
- Experimental and Clinical Research CenterCharitè and Max‐Delbrück‐Center for Molecular MedicineBerlinGermany
| | - Sarah Theurer
- Institute of PathologyUniversity Hospital EssenGermany
| | | | - Dagmar Führer‐Sakel
- Department of Endocrinology, Diabetes and Metabolism and Clinical Chemistry – Division of Laboratory ResearchUniversity Hospital EssenGermany
| | - Jörg Piontek
- Institute of Clinical Physiology / Nutritional Medicine, Medical DepartmentDivision of Gastroenterology, Infectiology, Rheumatology, Charitè – Universitätsmedizin BerlinGermany
| | - Gerd Krause
- Leibniz‐Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
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2
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Sugimoto K, Ichikawa-Tomikawa N, Kashiwagi K, Endo C, Tanaka S, Sawada N, Watabe T, Higashi T, Chiba H. Cell adhesion signals regulate the nuclear receptor activity. Proc Natl Acad Sci U S A 2019; 116:24600-24609. [PMID: 31740618 PMCID: PMC6900646 DOI: 10.1073/pnas.1913346116] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cell adhesion is essential for proper tissue architecture and function in multicellular organisms. Cell adhesion molecules not only maintain tissue integrity but also possess signaling properties that contribute to diverse cellular events such as cell growth, survival, differentiation, polarity, and migration; however, the underlying molecular basis remains poorly defined. Here we identify that the cell adhesion signal initiated by the tight-junction protein claudin-6 (CLDN6) regulates nuclear receptor activity. We show that CLDN6 recruits and activates Src-family kinases (SFKs) in second extracellular domain-dependent and Y196/200-dependent manners, and SFKs in turn phosphorylate CLDN6 at Y196/200. We demonstrate that the CLDN6/SFK/PI3K/AKT axis targets the AKT phosphorylation sites in the retinoic acid receptor γ (RARγ) and the estrogen receptor α (ERα) and stimulates their activities. Interestingly, these phosphorylation motifs are conserved in 14 of 48 members of human nuclear receptors. We propose that a similar link between diverse cell adhesion and nuclear receptor signalings coordinates a wide variety of physiological and pathological processes.
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Affiliation(s)
- Kotaro Sugimoto
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Naoki Ichikawa-Tomikawa
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Korehito Kashiwagi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Chihiro Endo
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Satoshi Tanaka
- Department of Pathology, Sapporo Medical University School of Medicine, 060-8556 Sapporo, Japan
| | - Norimasa Sawada
- Department of Pathology, Sapporo Medical University School of Medicine, 060-8556 Sapporo, Japan
| | - Tetsuya Watabe
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan;
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Alberini G, Benfenati F, Maragliano L. Molecular Dynamics Simulations of Ion Selectivity in a Claudin-15 Paracellular Channel. J Phys Chem B 2018; 122:10783-10792. [DOI: 10.1021/acs.jpcb.8b06484] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Giulio Alberini
- Center for Synaptic Neuroscience and Technology (NSYN@UniGe), Istituto Italiano di Tecnologia, Largo Rosanna Benzi, 10, 16132 Genova, Italy
- Department of Experimental Medicine, Università degli Studi di Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
| | - Fabio Benfenati
- Center for Synaptic Neuroscience and Technology (NSYN@UniGe), Istituto Italiano di Tecnologia, Largo Rosanna Benzi, 10, 16132 Genova, Italy
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genova, Italy
| | - Luca Maragliano
- Center for Synaptic Neuroscience and Technology (NSYN@UniGe), Istituto Italiano di Tecnologia, Largo Rosanna Benzi, 10, 16132 Genova, Italy
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi, 10, 16132 Genova, Italy
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4
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Díaz-Coránguez M, Ramos C, Antonetti DA. The inner blood-retinal barrier: Cellular basis and development. Vision Res 2017; 139:123-137. [PMID: 28619516 DOI: 10.1016/j.visres.2017.05.009] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/26/2017] [Accepted: 05/30/2017] [Indexed: 01/01/2023]
Abstract
The blood-retinal barrier (BRB) regulates transport across retinal capillaries maintaining proper neural homeostasis and protecting the neural tissue from potential blood borne toxicity. Loss of the BRB contributes to the pathophysiology of a number of blinding retinal diseases including diabetic retinopathy. In this review, we address the basis of the BRB, including the molecular mechanisms that regulate flux across the retinal vascular bed. The routes of transcellular and paracellular flux are described as well as alterations in these pathways in response to permeabilizing agents in diabetes. Finally, we provide information on exciting new studies that help to elucidate the process of BRB development or barriergenesis and how understanding this process may lead to new opportunities for barrier restoration in diabetic retinopathy.
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Affiliation(s)
- Mónica Díaz-Coránguez
- Department of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, United States
| | - Carla Ramos
- Department of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, United States
| | - David A Antonetti
- Department of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, United States.
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Irudayanathan FJ, Wang N, Wang X, Nangia S. Architecture of the paracellular channels formed by claudins of the blood–brain barrier tight junctions. Ann N Y Acad Sci 2017; 1405:131-146. [DOI: 10.1111/nyas.13378] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 01/31/2023]
Affiliation(s)
| | - Nan Wang
- Department of Biomedical and Chemical Engineering Syracuse University Syracuse New York
| | - Xiaoyi Wang
- Department of Biomedical and Chemical Engineering Syracuse University Syracuse New York
| | - Shikha Nangia
- Department of Biomedical and Chemical Engineering Syracuse University Syracuse New York
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Piontek A, Rossa J, Protze J, Wolburg H, Hempel C, Günzel D, Krause G, Piontek J. Polar and charged extracellular residues conserved among barrier-forming claudins contribute to tight junction strand formation. Ann N Y Acad Sci 2017; 1397:143-156. [DOI: 10.1111/nyas.13341] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 02/26/2017] [Accepted: 03/01/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Anna Piontek
- Leibniz-Institut für Molekulare Pharmakologie (FMP); Berlin Germany
| | - Jan Rossa
- Leibniz-Institut für Molekulare Pharmakologie (FMP); Berlin Germany
| | - Jonas Protze
- Leibniz-Institut für Molekulare Pharmakologie (FMP); Berlin Germany
| | - Hartwig Wolburg
- Institute of Pathology and Neuropathology; University of Tübingen; Tübingen Germany
| | - Caroline Hempel
- Institute of Clinical Physiology; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Dorothee Günzel
- Institute of Clinical Physiology; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - Gerd Krause
- Leibniz-Institut für Molekulare Pharmakologie (FMP); Berlin Germany
| | - Jörg Piontek
- Institute of Clinical Physiology; Charité - Universitätsmedizin Berlin; Berlin Germany
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Conrad MP, Piontek J, Günzel D, Fromm M, Krug SM. Molecular basis of claudin-17 anion selectivity. Cell Mol Life Sci 2016; 73:185-200. [PMID: 26194246 PMCID: PMC11108356 DOI: 10.1007/s00018-015-1987-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/23/2015] [Accepted: 07/09/2015] [Indexed: 01/09/2023]
Abstract
Claudin-17 is a paracellular channel-forming tight junction protein. Unlike the cation channels claudin-2 and -15, claudin-17 forms a distinct anion-selective channel. Aim of this study was to determine the molecular basis of channel formation and charge selectivity of this protein. To achieve this, residues located in the extracellular loops (ECL) 1 and 2 of claudin-17 were substituted, preferably those whose charges differed in claudin-17 and in claudin-2 or -15. The respective mutants were stably expressed in MDCK C7 cells and their ability to form charge-selective channels was analyzed by measuring ion permeabilities and transepithelial electrical resistance. The functional data were combined with homology modeling of the claudin-17 protomer using the structure of claudin-15 as template. In ECL1, K65, R31, E48, and E44 were found to be stronger involved in Cldn17 channel function than the clustered R45, R56, R59, and R61. For K65, not only charge but also stereochemical properties were crucial for formation of the anion-selective channel. In ECL2, both Y149 and H154 were found to contribute to constitution of the anion channel in a distinct manner. In conclusion, we provide insight into the molecular mechanism of the formation of charge- and size-selective paracellular ion channels. In detail, we propose a hydrophilic furrow in the claudin-17 protomer spanning from a gap between the ends of TM2 and TM3 along R31, E48, and Y67 to a gap between K65 and S68 lining the anion channel.
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Affiliation(s)
- Marcel P Conrad
- Institute of Clinical Physiology, Charité, Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Jörg Piontek
- Institute of Clinical Physiology, Charité, Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Dorothee Günzel
- Institute of Clinical Physiology, Charité, Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Michael Fromm
- Institute of Clinical Physiology, Charité, Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Susanne M Krug
- Institute of Clinical Physiology, Charité, Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany.
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Irudayanathan FJ, Trasatti JP, Karande P, Nangia S. Molecular Architecture of the Blood Brain Barrier Tight Junction Proteins–A Synergistic Computational and In Vitro Approach. J Phys Chem B 2015; 120:77-88. [DOI: 10.1021/acs.jpcb.5b09977] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
| | - John P. Trasatti
- Department
of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Pankaj Karande
- Department
of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Shikha Nangia
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse New York 13244, United States
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9
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Assembly and function of claudins: Structure–function relationships based on homology models and crystal structures. Semin Cell Dev Biol 2015; 42:3-12. [DOI: 10.1016/j.semcdb.2015.04.010] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/28/2015] [Accepted: 04/29/2015] [Indexed: 01/12/2023]
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10
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Tscheik C, Blasig IE, Winkler L. Trends in drug delivery through tissue barriers containing tight junctions. Tissue Barriers 2014; 1:e24565. [PMID: 24665392 PMCID: PMC3887097 DOI: 10.4161/tisb.24565] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/03/2013] [Accepted: 04/04/2013] [Indexed: 11/22/2022] Open
Abstract
A limitation in the uptake of many drugs is the restricted permeation through tissue barriers. There are two general ways to cross barriers formed by cell layers: by transcytosis or by diffusion through the intercellular space. In the latter, tight junctions (TJs) play the decisive role in the regulation of the barrier permeability. Thus, transient modulation of TJs is a potent strategy to improve drug delivery. There have been extensive studies on surfactant-like absorption enhancers. One of the most effective enhancers found is sodium caprate. However, this modulates TJs in an unspecific fashion. A novel approach would be the specific modulation of TJ-associated marvel proteins and claudins, which are the main structural components of the TJs. Recent studies have identified synthetic peptidomimetics and RNA interference techniques to downregulate the expression of targeted TJ proteins. This review summarizes current progress and discusses the impact on TJs' barrier function.
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Affiliation(s)
| | - Ingolf E Blasig
- Leibniz Institut für Molekulare Pharmakologie; Berlin-Buch, Germany
| | - Lars Winkler
- Leibniz Institut für Molekulare Pharmakologie; Berlin-Buch, Germany
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