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Lang A, Jeron RL, Kiesel B, Mischkulnig M, Bergmeister-Berghoff AS, Ricken G, Wöhrer A, Rössler K, Lötsch-Gojo D, Rötzer-Pejrimovsky T, Hainfellner JA, Höftberger R, Widhalm G, Erhart F. P13.04.B Dissecting high-grade glioma immune infiltration in samples from fluorescence-guided surgery: digital pathology with automated image analysis. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Fluorescence-guided surgery with 5-aminolevulinic acid (5-ALA) is a widely used technique to conduct maximum safe resection of high-grade gliomas (HGG). 5-ALA accumulates in malignant tumor tissue where it is metabolized to Protoporphyrin IX (PpIX), an agent with fluorescence properties. It helps neurosurgeons to distinguish between tumor-infiltrated tissue and healthy brain parenchyma. Even though fluorescence-guided surgery is clinically well established, the biological properties of different fluorescence levels are not comprehensively studied yet. A relevant current gap in that respect is the pattern of immune cell infiltration in fluorescent versus non-fluorescent tissue samples. In light of future research, reliable, standardized histopathology methods that allow high-throughput analysis are desirable and digital pathology with automated image analysis is an attractive option to explore.
Material and Methods
128 formalin-fixed paraffin-embedded (FFPE) tissue blocks of 39 patients who underwent fluorescence-guided surgery of a HGG were included. Samples were selected based on their documented 5-ALA fluorescence intensity status (strong, vague, negative). Microtome-cut sections of the tissue were stained with antibodies against CD8, CD68, CD163 and FOX P3, representing immune cell populations of specific interest (cytotoxic T cells, glioma-associated macrophages, regulatory T cells). A total of 512 stained slides were then available for assessment. In addition to a classical, semi-quantitative analysis by two independent human reviewers, the immune infiltration intensity was measured via automated image analysis with the digital pathology software QuPath Version 0.3.2.
Results
Across all stained FFPE samples CD68 showed the overall highest intensity, followed by CD163. CD8 and FoxP3 showed generally lower average intensities. In 5-ALA negative and positive high-grade glioma samples the immune cell infiltration pattern was the same. Quantitative automatic digital pathology correlated well with the classical human histopathological analysis for the majority of markers evaluated.
Conclusion
We successfully explored and established novel digital pathology technologies for the study of immune cell infiltration patterns in neurooncology, specifically in the context of fluorescence-guided resection. Leveraging this platform could allow parallelized and high-throughput analysis of immune cell infiltration also in other contexts.
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Affiliation(s)
- A Lang
- Medical University Vienna , Vienna , Austria
| | - R L Jeron
- Medical University Vienna , Vienna , Austria
| | - B Kiesel
- Medical University Vienna , Vienna , Austria
| | | | | | - G Ricken
- Medical University Vienna , Vienna , Austria
| | - A Wöhrer
- Medical University Vienna , Vienna , Austria
| | - K Rössler
- Medical University Vienna , Vienna , Austria
| | | | | | | | | | - G Widhalm
- Medical University Vienna , Vienna , Austria
| | - F Erhart
- Medical University Vienna , Vienna , Austria
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2
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Mir Seyed Nazari P, Ay C, Preusser M, Riedl J, Marosi C, Moik F, Ricken G, Hainfellner J, Pabinger-Fasching I, Berghoff A. Association of systemic inflammation with local tumour characteristics and survival in glioma patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz243.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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3
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Borrego-Écija S, Cortés-Vicente E, Cervera-Carles L, Clarimón J, Gámez J, Batlle J, Ricken G, Molina-Porcel L, Aldecoa I, Sánchez-Valle R, Rojas-García R, Gelpi E. Does ALS-FUS without FUS mutation represent ALS-FET? Report of three cases. Neuropathol Appl Neurobiol 2018; 45:421-426. [PMID: 30375034 PMCID: PMC7380051 DOI: 10.1111/nan.12527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 10/10/2018] [Indexed: 01/29/2023]
Affiliation(s)
- S Borrego-Écija
- Neurology Department, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Neurological Tissue Bank of the Biobanc-Hospital Clínic-IDIBAPS, Barcelona, Spain
| | - E Cortés-Vicente
- Neurology Department, Institut d'Investigacions Biomèdiques-Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - L Cervera-Carles
- Neurology Department, Institut d'Investigacions Biomèdiques-Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Center for Networked Biomedical Research into Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - J Clarimón
- Neurology Department, Institut d'Investigacions Biomèdiques-Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Center for Networked Biomedical Research into Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - J Gámez
- Neurology Department, Hospital de la Vall d'Hebron, Barcelona, Spain
| | - J Batlle
- Neurology Department, Hospital Sant Pau y Santa Tecla, Tarragona, Spain
| | - G Ricken
- Institute of Neurology, Medical University of Vienna, Vienna, Austria
| | - L Molina-Porcel
- Neurological Tissue Bank of the Biobanc-Hospital Clínic-IDIBAPS, Barcelona, Spain
| | - I Aldecoa
- Neurological Tissue Bank of the Biobanc-Hospital Clínic-IDIBAPS, Barcelona, Spain.,Pathology Department, CDB, Hospital Clinic Barcelona, Barcelona, Spain
| | - R Sánchez-Valle
- Neurology Department, Hospital Clínic-IDIBAPS, Barcelona, Spain.,Neurological Tissue Bank of the Biobanc-Hospital Clínic-IDIBAPS, Barcelona, Spain
| | - R Rojas-García
- Neurology Department, Institut d'Investigacions Biomèdiques-Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.,Center for Networked Biomedical Research into Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - E Gelpi
- Neurological Tissue Bank of the Biobanc-Hospital Clínic-IDIBAPS, Barcelona, Spain.,Institute of Neurology, Medical University of Vienna, Vienna, Austria
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4
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Berghoff A, Erguener B, Schuster M, Rajky U, Ricken G, Frischer J, Gatterbauer B, Marosi C, Dieckmann K, Widhalm G, Bock C, Preusser M. Mutational and inflammatory microenvironment characteristics in primary and matched local recurrent non-small cell lung cancer brain metastases. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy273.360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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5
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Berghoff AS, Ricken G, Rajky U, Marosi C, Hainfellner JA, von Deimling A, Sahm F, Preusser M. P05.51 Prognostic impact of genetic alterations and methylation class in meningioma. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - G Ricken
- Medical University of Vienna, Vienna, Austria
| | - U Rajky
- Medical University of Vienna, Vienna, Austria
| | - C Marosi
- Medical University of Vienna, Vienna, Austria
| | | | | | - F Sahm
- University Hospital Heidelberg, Heidelberg, Germany
| | - M Preusser
- Medical University of Vienna, Vienna, Austria
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6
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Mir Seyed Nazari P, Riedl J, Preusser M, Posch F, Thaler J, Marosi C, Birner P, Ricken G, Hainfellner JA, Pabinger I, Ay C. Combination of isocitrate dehydrogenase 1 (IDH1) mutation and podoplanin expression in brain tumors identifies patients at high or low risk of venous thromboembolism. J Thromb Haemost 2018; 16:1121-1127. [PMID: 29676036 PMCID: PMC6099350 DOI: 10.1111/jth.14129] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Indexed: 12/11/2022]
Abstract
Essentials Risk stratification for venous thromboembolism (VTE) in patients with brain tumors is challenging. Patients with IDH1 wildtype and high podoplanin expression have a 6-month VTE risk of 18.2%. Patients with IDH1 mutation and no podoplanin expression have a 6-month VTE risk of 0%. IDH1 mutation and podoplanin overexpression in primary brain tumors appear to be exclusive. SUMMARY Background Venous thromboembolism (VTE) is a frequent complication in primary brain tumor patients. Independent studies revealed that podoplanin expression in brain tumors is associated with increased VTE risk, whereas the isocitrate dehydrogenase 1 (IDH1) mutation is associated with very low VTE risk. Objectives To investigate the interrelation between intratumoral podoplanin expression and IDH1 mutation, and their mutual impact on VTE development. Patients/Methods In a prospective cohort study, intratumoral IDH1 R132H mutation and podoplanin were determined in brain tumor specimens (mainly glioma) by immunohistochemistry. The primary endpoint of the study was symptomatic VTE during a 2-year follow-up. Results All brain tumors that expressed podoplanin to a medium-high extent showed also an IDH1 wild-type status. A score based on IDH1 status and podoplanin expression levels allowed prediction of the risk of VTE. Patients with wild-type IDH1 brain tumors and high podoplanin expression had a significantly increased VTE risk compared with those with mutant IDH1 tumors and no podoplanin expression (6-month risk 18.2% vs. 0%). Conclusions IDH1 mutation and podoplanin overexpression seem to be exclusive. Although brain tumor patients with IDH1 mutation are at very low risk of VTE, the risk of VTE in patients with IDH1 wild-type tumors is strongly linked to podoplanin expression levels.
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Affiliation(s)
- P. Mir Seyed Nazari
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - J. Riedl
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - M. Preusser
- Clinical Division of OncologyDepartment of Medicine IComprehensive Cancer CenterMedical University of ViennaViennaAustria
| | - F. Posch
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
- Division of OncologyDepartment of Internal MedicineMedical University of GrazGrazAustria
| | - J. Thaler
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - C. Marosi
- Clinical Division of OncologyDepartment of Medicine IComprehensive Cancer CenterMedical University of ViennaViennaAustria
| | - P. Birner
- Clinical Institute of PathologyMedical University of ViennaViennaAustria
| | - G. Ricken
- Institute of NeurologyMedical University of ViennaViennaAustria
| | | | - I. Pabinger
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - C. Ay
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
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Nazari P, Riedl J, Preusser M, Posch F, Thaler J, Marosi C, Birner P, Ricken G, Hainfellner J, Pabinger I, Ay C. The combination of podoplanin expression levels and IDH1 mutation status predicts VTE risk in patients with brain tumors. Thromb Res 2018. [DOI: 10.1016/j.thromres.2018.02.038] [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: 11/17/2022]
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Berghoff AS, Kresl P, Rajky O, Widhalm G, Ricken G, Hainfellner J, Marosi C, Zielinski CC, Birner P, Preusser M. P04.03 Analysis of the inflammatory tumor microenvironment in meningeal malignancies. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now188.081] [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: 11/12/2022] Open
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Berghoff A, Cansu I, Rajky O, Ricken G, Widhalm G, Dieckmann K, Birner P, Oberndorfer F, Dome B, Bartsch R, Zielinski C, Preusser M. 2926 Tumor-infiltrating lymphocytes (TILs) and PDL1 expression in lung cancer brain metastases. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31641-0] [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]
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10
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Berghoff A, Kiesel B, Widhalm G, Rajky O, Ricken G, Wöhrer A, Dieckmann K, Zielinski C, Marosi C, Preusser M. 2927 Programmed death ligand 1 (PD-L1) expression and tumor infiltrating lymphocytes in diffuse and anaplastic gliomas. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31642-2] [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]
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Berghoff AS, Kiesel B, Widhalm G, Rajky O, Ricken G, Wohrer A, Oberndorfer F, Dieckmann K, Filipits M, Marosi C, Holler C, Wick W, Preusser M. IB-02 * ROLE OF TUMOR INFILTRATING LYMPHOCYTES AND PDL1 EXPRESSION IN GLIOBLASTOMA (GBM) AND BRAIN METASTASES (BM): COMPARATIVE ANALYSIS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou257.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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12
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Berghoff A, Inan C, Ricken G, Widhalm G, Dieckmann K, Birner P, Oberndorfer F, Dome B, Bartsch R, Zielinski C, Preusser M. Tumor-Infiltrating Lymphocytes (Tils) and Pd-L1 Expression in Non- Small Cell Lung Cancer Brain Metastases (Bm) and Matched Primary Tumors (Pt). Ann Oncol 2014. [DOI: 10.1093/annonc/mdu349.103] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Turajlic S, Furney SJ, Stamp G, Rana S, Ricken G, Oduko Y, Saturno G, Springer C, Hayes A, Gore M, Larkin J, Marais R. Whole-genome sequencing reveals complex mechanisms of intrinsic resistance to BRAF inhibition. Ann Oncol 2014; 25:959-67. [PMID: 24504448 PMCID: PMC3999800 DOI: 10.1093/annonc/mdu049] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 02/03/2014] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND BRAF is mutated in ∼42% of human melanomas (COSMIC. http://www.sanger.ac.uk/genetics/CGP/cosmic/) and pharmacological BRAF inhibitors such as vemurafenib and dabrafenib achieve dramatic responses in patients whose tumours harbour BRAF(V600) mutations. Objective responses occur in ∼50% of patients and disease stabilisation in a further ∼30%, but ∼20% of patients present primary or innate resistance and do not respond. Here, we investigated the underlying cause of treatment failure in a patient with BRAF mutant melanoma who presented primary resistance. METHODS We carried out whole-genome sequencing and single nucleotide polymorphism (SNP) array analysis of five metastatic tumours from the patient. We validated mechanisms of resistance in a cell line derived from the patient's tumour. RESULTS We observed that the majority of the single-nucleotide variants identified were shared across all tumour sites, but also saw site-specific copy-number alterations in discrete cell populations at different sites. We found that two ubiquitous mutations mediated resistance to BRAF inhibition in these tumours. A mutation in GNAQ sustained mitogen-activated protein kinase (MAPK) signalling, whereas a mutation in PTEN activated the PI3 K/AKT pathway. Inhibition of both pathways synergised to block the growth of the cells. CONCLUSIONS Our analyses show that the five metastases arose from a common progenitor and acquired additional alterations after disease dissemination. We demonstrate that a distinct combination of mutations mediated primary resistance to BRAF inhibition in this patient. These mutations were present in all five tumours and in a tumour sample taken before BRAF inhibitor treatment was administered. Inhibition of both pathways was required to block tumour cell growth, suggesting that combined targeting of these pathways could have been a valid therapeutic approach for this patient.
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Affiliation(s)
| | - S. J. Furney
- Molecular Oncology Group, Cancer Research UK Manchester Institute, Manchester
| | - G. Stamp
- Experimental Pathology Laboratory, Cancer Research UK London Research Institute, London
| | - S. Rana
- The Institute of Cancer Research, London
| | - G. Ricken
- The Institute of Cancer Research, London
| | - Y. Oduko
- The Institute of Cancer Research, London
| | - G. Saturno
- Molecular Oncology Group, Cancer Research UK Manchester Institute, Manchester
| | - C. Springer
- Division of Cancer Therapeutics, The Institute of Cancer Research, London
| | | | - M. Gore
- Melanoma Unit, Royal Marsden Hospital, London, UK
| | - J. Larkin
- Melanoma Unit, Royal Marsden Hospital, London, UK
| | - R. Marais
- Molecular Oncology Group, Cancer Research UK Manchester Institute, Manchester
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Faaland CA, Race JE, Ricken G, Warner FJ, Williams WJ, Holtzman EJ. Molecular characterization of two novel transporters from human and mouse kidney and from LLC-PK1 cells reveals a novel conserved family that is homologous to bacterial and Aspergillus nucleobase transporters. Biochim Biophys Acta 1998; 1442:353-60. [PMID: 9804989 DOI: 10.1016/s0167-4781(98)00151-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleobase transport is important for the metabolism of nucleic acids and antiviral and antineoplastic drugs. This transport has been functionally described in several mammalian cells but has not been well characterized molecularly. We report the cloning of two novel transporters. YSPL2 encodes a 650-residue protein and has an ubiquitous 8 kb transcript. The human and pig homologs are 95% similar. YSPL3 encodes a 598-residue protein with a 3 kb transcript that is expressed only in kidney and liver. Human YSPL2 and YSPL3 are 60% similar at the amino acid level and both show 31% similarity to the first nucleobase permease gene described in vertebrates, YSPL1. These proteins appear to be members of a new family of possible nucleobase transporters with significant sequence similarities with bacterial and Aspergillus nucleobase transporters. Further functional studies will be needed to unveil the role of these transporters in nucleic acid metabolism in normal and in disease states.
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Affiliation(s)
- C A Faaland
- Renal Division, Department of Medicine, SUNY-Health Science Center, Syracuse, NY, USA
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15
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Holtzman EJ, Kumar S, Faaland CA, Warner F, Logue PJ, Erickson SJ, Ricken G, Waldman J, Kumar S, Dunham PB. Cloning, characterization, and gene organization of K-Cl cotransporter from pig and human kidney and C. elegans. Am J Physiol Renal Physiol 1998; 275:F550-64. [PMID: 9755127 DOI: 10.1152/ajprenal.1998.275.4.f550] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We isolated and characterized the cDNAs for the human, pig, and Caenorhabditis elegans K-Cl cotransporters. The pig and human homologs are 94% identical and contain 1,085 and 1,086 amino acids, respectively. The deduced protein of the C. elegans K-Cl cotransporter clone (CE-KCC1) contains 1,003 amino acids. The mammalian K-Cl cotransporters share approximately 45% similarity with CE-KCC1. Hydropathy analyses of the three clones indicate typical KCC topology patterns with 12 transmembrane segments, large extracellular loops between transmembrane domains 5 and 6 (unique to KCC), and large COOH-terminal domains. Human KCC1 is widely expressed among various tissues. This KCC1 gene spans 23 kb and is organized in 24 exons, whereas the CE-KCC1 gene spans 3.5 kb and contains 10 exons. Transiently and stably transfected human embryonic kidney cells (HEK-293) expressing the human, pig, and C. elegans K-Cl cotransporter fulfilled two (pig) or five (human and C. elegans) criteria for increased expression of the K-Cl cotransporter. The criteria employed were basal K-Cl cotransport; stimulation of cotransport by swelling, N-ethylmaleimide, staurosporine, and reduced cell Mg concentration; and secondary stimulation of Na-K-Cl cotransport.
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Affiliation(s)
- E J Holtzman
- Renal Division, Department of Medicine, State University of New York-Health Science Center, Syracuse, New York 13210, USA
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Affiliation(s)
- G Ricken
- Klinische Forschergruppe für Rheumatologie, Universitätsklinikum Freiburg, Germany
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17
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Pluschke G, Ricken G, Taube H, Kroninger S, Melchers I, Peter HH, Eichmann K, Krawinkel U. Biased T cell receptor V alpha region repertoire in the synovial fluid of rheumatoid arthritis patients. Eur J Immunol 1991; 21:2749-54. [PMID: 1657615 DOI: 10.1002/eji.1830211115] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.3] [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: 12/28/2022]
Abstract
Synovial T lymphocytes seem to contribute to the pathogenesis of rheumatoid arthritis (RA). Since very little is known about the structural heterogeneity of their T cell antigen receptors (TcR), we analyzed TcR alpha chain mRNA of synovial fluid T cells from two RA patients. TcR alpha chain cDNA was amplified by the polymerase chain reaction with single-sided specificity for the alpha chain constant (C alpha) gene segment, and the nucleotide sequences of 51 functionally rearranged cDNA clones were determined. Twenty different V alpha genes and 26 different J alpha gene segments were utilized in these cDNA clones. Three of the V alpha gene segments which are frequently (8%-17% total) expressed in synovial fluid T cells have rarely been found in the TcR repertoire of peripheral blood T cells from healthy individuals. The T cell responses in the rheumatic synovia analyzed here are not oligoclonal, but the usage of TcR V alpha genes is biased.
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Affiliation(s)
- G Pluschke
- Klinische Forschergruppe für Rheumatologie, Universitätsklinikums Freiburg, FRG
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18
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Halter K, Ricken G. Der Lupus vulgaris im Schlesischen Raum. Arch Dermatol Res 1943. [DOI: 10.1007/bf02061687] [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: 10/25/2022]
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