1
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Marttila P, Bonagas N, Chalkiadaki C, Stigsdotter H, Schelzig K, Shen J, Farhat CM, Hondema A, Albers J, Wiita E, Rasti A, Warpman Berglund U, Slipicevic A, Mortusewicz O, Helleday T. The one-carbon metabolic enzyme MTHFD2 promotes resection and homologous recombination after ionizing radiation. Mol Oncol 2024. [PMID: 38533616 DOI: 10.1002/1878-0261.13645] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 02/23/2024] [Accepted: 03/18/2024] [Indexed: 03/28/2024] Open
Abstract
The one-carbon metabolism enzyme bifunctional methylenetetrahydrofolate dehydrogenase/cyclohydrolase 2 (MTHFD2) is among the most overexpressed proteins across tumors and is widely recognized as a promising anticancer target. While MTHFD2 is mainly described as a mitochondrial protein, a new nuclear function is emerging. Here, we observe that nuclear MTHFD2 protein levels and association with chromatin increase following ionizing radiation (IR) in an ataxia telangiectasia mutated (ATM)- and DNA-dependent protein kinase (DNA-PK)-dependent manner. Furthermore, repair of IR-induced DNA double-strand breaks (DSBs) is delayed upon MTHFD2 knockdown, suggesting a role for MTHFD2 in DSB repair. In support of this, we observe impaired recruitment of replication protein A (RPA), reduced resection, decreased IR-induced DNA repair protein RAD51 homolog 1 (RAD51) levels and impaired homologous recombination (HR) activity in MTHFD2-depleted cells following IR. In conclusion, we identify a key role for MTHFD2 in HR repair and describe an interdependency between MTHFD2 and HR proficiency that could potentially be exploited for cancer therapy.
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Affiliation(s)
- Petra Marttila
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Nadilly Bonagas
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Christina Chalkiadaki
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Hannah Stigsdotter
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Korbinian Schelzig
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Jianyu Shen
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Crystal M Farhat
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Amber Hondema
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Julian Albers
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Elisée Wiita
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Azita Rasti
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Ulrika Warpman Berglund
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Ana Slipicevic
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
- One-carbon Therapeutics AB, Stockholm, Sweden
| | - Oliver Mortusewicz
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Thomas Helleday
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
- Weston Park Cancer Centre, Department of Oncology and Metabolism, The Medical School, University of Sheffield, UK
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2
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Storm S, Bourenkov G, Liz D, Clement B, Agthe M, Von Stetten D, Albers J, Fiedler S, Svergun D, Wilmanns M, Schneider T. EMBL at PETRA4 – an integrated facility for structural biology and imaging. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322094359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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3
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Pelka K, Hofree M, Chen JH, Sarkizova S, Pirl JD, Jorgji V, Bejnood A, Dionne D, Ge WH, Xu KH, Chao SX, Zollinger DR, Lieb DJ, Reeves JW, Fuhrman CA, Hoang ML, Delorey T, Nguyen LT, Waldman J, Klapholz M, Wakiro I, Cohen O, Albers J, Smillie CS, Cuoco MS, Wu J, Su MJ, Yeung J, Vijaykumar B, Magnuson AM, Asinovski N, Moll T, Goder-Reiser MN, Applebaum AS, Brais LK, DelloStritto LK, Denning SL, Phillips ST, Hill EK, Meehan JK, Frederick DT, Sharova T, Kanodia A, Todres EZ, Jané-Valbuena J, Biton M, Izar B, Lambden CD, Clancy TE, Bleday R, Melnitchouk N, Irani J, Kunitake H, Berger DL, Srivastava A, Hornick JL, Ogino S, Rotem A, Vigneau S, Johnson BE, Corcoran RB, Sharpe AH, Kuchroo VK, Ng K, Giannakis M, Nieman LT, Boland GM, Aguirre AJ, Anderson AC, Rozenblatt-Rosen O, Regev A, Hacohen N. Spatially organized multicellular immune hubs in human colorectal cancer. Cell 2021; 184:4734-4752.e20. [PMID: 34450029 PMCID: PMC8772395 DOI: 10.1016/j.cell.2021.08.003] [Citation(s) in RCA: 212] [Impact Index Per Article: 70.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 05/28/2021] [Accepted: 08/03/2021] [Indexed: 12/11/2022]
Abstract
Immune responses to cancer are highly variable, with mismatch repair-deficient (MMRd) tumors exhibiting more anti-tumor immunity than mismatch repair-proficient (MMRp) tumors. To understand the rules governing these varied responses, we transcriptionally profiled 371,223 cells from colorectal tumors and adjacent normal tissues of 28 MMRp and 34 MMRd individuals. Analysis of 88 cell subsets and their 204 associated gene expression programs revealed extensive transcriptional and spatial remodeling across tumors. To discover hubs of interacting malignant and immune cells, we identified expression programs in different cell types that co-varied across tumors from affected individuals and used spatial profiling to localize coordinated programs. We discovered a myeloid cell-attracting hub at the tumor-luminal interface associated with tissue damage and an MMRd-enriched immune hub within the tumor, with activated T cells together with malignant and myeloid cells expressing T cell-attracting chemokines. By identifying interacting cellular programs, we reveal the logic underlying spatially organized immune-malignant cell networks.
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Affiliation(s)
- Karin Pelka
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Matan Hofree
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Jonathan H Chen
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Pathology, MGH, Boston, MA, USA
| | - Siranush Sarkizova
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Joshua D Pirl
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Vjola Jorgji
- Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Pathology, MGH, Boston, MA, USA
| | - Alborz Bejnood
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Danielle Dionne
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - William H Ge
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Katherine H Xu
- Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Sherry X Chao
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Biomedical Informatics, HMS, Boston, MA, USA
| | | | - David J Lieb
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | | | | | | | - Toni Delorey
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Lan T Nguyen
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Julia Waldman
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Max Klapholz
- Evergrande Center for Immunologic Diseases, HMS and Brigham and Women's Hospital (BWH), Boston, MA, USA
| | - Isaac Wakiro
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | - Ofir Cohen
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA; Department of Medical Oncology, DFCI, Boston, MA, USA
| | - Julian Albers
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | | | - Michael S Cuoco
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Jingyi Wu
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | - Mei-Ju Su
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | - Jason Yeung
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | | | | | | | - Tabea Moll
- Clinical Research Center, MGH, Boston, MA, USA
| | | | | | | | - Laura K DelloStritto
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | | | | | - Emma K Hill
- Clinical Research Center, DFCI, Boston, MA, USA
| | | | | | | | - Abhay Kanodia
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | - Ellen Z Todres
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Judit Jané-Valbuena
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Moshe Biton
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Department of Molecular Biology, MGH, Boston, MA, USA
| | - Benjamin Izar
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA; Department of Medical Oncology, DFCI, Boston, MA, USA
| | - Conner D Lambden
- Evergrande Center for Immunologic Diseases, HMS and Brigham and Women's Hospital (BWH), Boston, MA, USA
| | | | | | | | | | | | | | | | | | - Shuji Ogino
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Pathology, BWH, Boston, MA, USA
| | - Asaf Rotem
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | - Sébastien Vigneau
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA
| | - Bruce E Johnson
- Center for Cancer Genomics, Department of Medical Oncology, Dana-Farber Cancer Institute (DFCI), Boston, MA, USA; Department of Medical Oncology, DFCI, Boston, MA, USA
| | - Ryan B Corcoran
- Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Medicine, HMS, Boston, MA, USA
| | - Arlene H Sharpe
- Evergrande Center for Immunologic Diseases, HMS and Brigham and Women's Hospital (BWH), Boston, MA, USA; Department of Immunology, Blavatnik Institute, HMS, Boston, MA, USA
| | - Vijay K Kuchroo
- Evergrande Center for Immunologic Diseases, HMS and Brigham and Women's Hospital (BWH), Boston, MA, USA
| | - Kimmie Ng
- Department of Medical Oncology, DFCI, Boston, MA, USA
| | - Marios Giannakis
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Medical Oncology, DFCI, Boston, MA, USA
| | - Linda T Nieman
- Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Genevieve M Boland
- Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Surgery, MGH, Boston, MA, USA
| | - Andrew J Aguirre
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Medical Oncology, DFCI, Boston, MA, USA
| | - Ana C Anderson
- Evergrande Center for Immunologic Diseases, HMS and Brigham and Women's Hospital (BWH), Boston, MA, USA.
| | | | - Aviv Regev
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Howard Hughes Medical Institute and Koch Institute for Integrative Cancer Research, Department of Biology, MIT, Cambridge, MA, USA.
| | - Nir Hacohen
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Massachusetts General Hospital (MGH) Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Immunology, HMS, Boston, MA, USA.
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4
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Pacilè S, Dullin C, Baran P, Tonutti M, Perske C, Fischer U, Albers J, Arfelli F, Dreossi D, Pavlov K, Maksimenko A, Mayo SC, Nesterets YI, Taba ST, Lewis S, Brennan PC, Gureyev TE, Tromba G, Wienbeck S. Free propagation phase-contrast breast CT provides higher image quality than cone-beam breast-CT at low radiation doses: a feasibility study on human mastectomies. Sci Rep 2019; 9:13762. [PMID: 31551475 PMCID: PMC6760215 DOI: 10.1038/s41598-019-50075-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 08/22/2019] [Indexed: 12/09/2022] Open
Abstract
In this study we demonstrate the first direct comparison between synchrotron x-ray propagation-based CT (PB-CT) and cone-beam breast-CT (CB-CT) on human mastectomy specimens (N = 12) including different benign and malignant lesions. The image quality and diagnostic power of the obtained data sets were compared and judged by two independent expert radiologists. Two cases are presented in detail in this paper including a comparison with the corresponding histological evaluation. Results indicate that with PB-CT it is possible to increase the level of contrast-to-noise ratio (CNR) keeping the same level of dose used for the CB-CT or achieve the same level of CNR reached by CB-CT at a lower level of dose. In other words, PB-CT can achieve a higher diagnostic potential compared to the commercial breast-CT system while also delivering a considerably lower mean glandular dose. Therefore, we believe that PB-CT technique, if translated to a clinical setting, could have a significant impact in improving breast cancer diagnosis.
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Affiliation(s)
- S Pacilè
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Italy. .,Department of Engineering and Architecture, University of Trieste, Trieste, Italy.
| | - C Dullin
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Italy.,Institute for Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany.,Translational Molecular Imaging, Max-Plank-Institute for Experimental Medicine, Goettingen, Germany
| | - P Baran
- ARC Centre of Excellence in Advanced Molecular Imaging, School of Physics, The University of Melbourne, Parkville, Australia
| | - M Tonutti
- Department of Radiology, Academic Hospital of Trieste, Trieste, Italy
| | - C Perske
- Institute for Pathology, University Medical Center Goettingen, Goettingen, Germany
| | - U Fischer
- Diagnostic Breast Center Goettingen, Goettingen, Germany
| | - J Albers
- Institute for Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany
| | - F Arfelli
- Department of Physics, University of Trieste, Trieste, Italy
| | - D Dreossi
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Italy
| | - K Pavlov
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.,School of Science and Technology, University of New England, Armidale, Australia.,School of Physics and Astronomy, Monash University, Clayton, Australia
| | | | - S C Mayo
- Commonwealth Scientific and Industrial Research Organisation, Clayton, Australia
| | - Y I Nesterets
- Commonwealth Scientific and Industrial Research Organisation, Clayton, Australia.,School of Science and Technology, University of New England, Armidale, Australia
| | - S Tavakoli Taba
- The University of Sydney, BREAST, Faculty of Health Sciences, Lidcombe, New South Wales, Australia
| | - S Lewis
- The University of Sydney, BREAST, Faculty of Health Sciences, Lidcombe, New South Wales, Australia
| | - P C Brennan
- The University of Sydney, BREAST, Faculty of Health Sciences, Lidcombe, New South Wales, Australia
| | - T E Gureyev
- ARC Centre of Excellence in Advanced Molecular Imaging, School of Physics, The University of Melbourne, Parkville, Australia.,School of Science and Technology, University of New England, Armidale, Australia.,School of Physics and Astronomy, Monash University, Clayton, Australia.,The University of Sydney, BREAST, Faculty of Health Sciences, Lidcombe, New South Wales, Australia
| | - G Tromba
- Elettra Sincrotrone Trieste S.C.p.A., Basovizza, Italy
| | - S Wienbeck
- Institute for Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany
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5
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Audehm S, Glaser M, Pecoraro M, Bräunlein E, Mall S, Klar R, Effenberger M, Albers J, Bianchi HDO, Peper J, Yusufi N, Busch DH, Stevanović S, Mann M, Antes I, Krackhardt AM. Key Features Relevant to Select Antigens and TCR From the MHC-Mismatched Repertoire to Treat Cancer. Front Immunol 2019; 10:1485. [PMID: 31316521 PMCID: PMC6611213 DOI: 10.3389/fimmu.2019.01485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 11/27/2018] [Accepted: 06/13/2019] [Indexed: 11/13/2022] Open
Abstract
Adoptive transfer of T cells transgenic for tumor-reactive T-cell receptors (TCR) is an attractive immunotherapeutic approach. However, clinical translation is so far limited due to challenges in the identification of suitable target antigens as well as TCRs that are concurrent safe and efficient. Definition of key characteristics relevant for effective and specific tumor rejection is essential to improve current TCR-based adoptive T-cell immunotherapies. We here characterized in-depth two TCRs derived from the human leukocyte antigen (HLA)-mismatched allogeneic repertoire targeting two different myeloperoxidase (MPO)-derived peptides presented by the same HLA-restriction element side by side comprising state of the art biochemical and cellular in vitro, in vivo, and in silico experiments. In vitro experiments reveal comparable functional avidities, off-rates, and cytotoxic activities for both TCRs. However, we observed differences especially with respect to cytokine secretion and cross-reactivity as well as in vivo activity. Biochemical and in silico analyses demonstrate different binding qualities of MPO-peptides to the HLA-complex determining TCR qualities. We conclude from our biochemical and in silico analyses of peptide-HLA-binding that rigid and high-affinity binding of peptides is one of the most important factors for isolation of TCRs with high specificity and tumor rejection capacity from the MHC-mismatched repertoire. Based on our results, we developed a workflow for selection of such TCRs with high potency and safety profile suitable for clinical translation.
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Affiliation(s)
- Stefan Audehm
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Manuel Glaser
- Center for Integrated Protein Science at the Department for Biosciences, Technische Universität München, Freising, Germany
| | - Matteo Pecoraro
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Eva Bräunlein
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Sabine Mall
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Richard Klar
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Manuel Effenberger
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universität München, Munich, Germany
| | - Julian Albers
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Henrique de Oliveira Bianchi
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Janet Peper
- Eberhard Karls University Tübingen, Interfaculty Institute for Cell Biology, Tübingen, Germany
| | - Nahid Yusufi
- Nuklearmedizin, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Dirk H Busch
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene, Technische Universität München, Munich, Germany
| | - Stefan Stevanović
- Eberhard Karls University Tübingen, Interfaculty Institute for Cell Biology, Tübingen, Germany.,Partner Site Tübingen, German Cancer Consortium (DKTK), Tübingen, Germany
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Iris Antes
- Center for Integrated Protein Science at the Department for Biosciences, Technische Universität München, Freising, Germany
| | - Angela M Krackhardt
- Klinik und Poliklinik für Innere Medizin III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Partner Site Munich, German Cancer Consortium (DKTK), Munich, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
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6
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Jeong DH, Jeong D, Albers J, Saeed S, Mohammad A. Cardiac Limited Ultrasound Exam (CLUE) Protocol for CHF Management in a Skilled Nursing Facility Setting. J Am Med Dir Assoc 2019. [DOI: 10.1016/j.jamda.2019.01.044] [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: 10/27/2022]
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7
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Albers J, Pacilé S, Markus MA, Wiart M, Vande Velde G, Tromba G, Dullin C. X-ray-Based 3D Virtual Histology-Adding the Next Dimension to Histological Analysis. Mol Imaging Biol 2019; 20:732-741. [PMID: 29968183 DOI: 10.1007/s11307-018-1246-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [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: 12/21/2022]
Abstract
Histology and immunohistochemistry of thin tissue sections have been the standard diagnostic procedure in many diseases for decades. This method is highly specific for particular tissue regions or cells, but mechanical sectioning of the specimens is required, which destroys the sample in the process and can lead to non-uniform tissue deformations. In addition, regions of interest cannot be located beforehand and the analysis is intrinsically two-dimensional. Micro X-ray computed tomography (μCT) on the other hand can provide 3D images at high resolution and allows for quantification of tissue structures, as well as the localization of small regions of interest. These advantages advocate the use of μCT for virtual histology tool with or without subsequent classical histology. This review summarizes the most recent examples of virtual histology and provides currently known possibilities of improving contrast and resolution of μCT. Following a background in μCT imaging, ex vivo staining procedures for contrast enhancement are presented as well as label-free virtual histology approaches and the technologies, which could rapidly advance it, such as phase-contrast CT. Novel approaches such as zoom tomography and nanoparticulate contrast agents will also be considered. The current evidence suggests that virtual histology may present a valuable addition to the workflow of histological analysis, potentially reducing the workload in pathology, refining tissue classification, and supporting the detection of small malignancies.
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Affiliation(s)
- J Albers
- Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
| | - S Pacilé
- Department of Engineering and Architecture, University of Trieste, Trieste, Italy.,Elettra Sincrotrone Trieste, Trieste, Italy
| | - M A Markus
- Translational Molecular Imaging, Max-Planck-Institute for Experimental Medicine, Göttingen, Germany
| | - M Wiart
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, 69500, Bron, France
| | - G Vande Velde
- Department of Imaging and Pathology, Faculty of Medicine, KU Leuven-University of Leuven, Leuven, Belgium
| | - G Tromba
- Elettra Sincrotrone Trieste, Trieste, Italy
| | - C Dullin
- Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany. .,Elettra Sincrotrone Trieste, Trieste, Italy. .,Translational Molecular Imaging, Max-Planck-Institute for Experimental Medicine, Göttingen, Germany.
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8
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Pembroke C, Albers J, Kildea J, Parker W, Faria S. EP-1407: Dosimetric Variables for Chest Wall Pain following Lung Stereotactic Body Radiotherapy. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31716-x] [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]
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9
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Doerner J, Eichhorn L, Luetkens JA, Lunkenheimer JN, Albers J, Nadal J, Schild HH, Naehle CP. Effects of repetitive prolonged breath-hold in elite divers on myocardial fibrosis and cerebral morphology. Eur J Radiol 2018; 103:13-18. [PMID: 29803378 DOI: 10.1016/j.ejrad.2018.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 03/13/2018] [Accepted: 03/15/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND Prolonged apnea by breath-hold (BH) divers leads to hypoxemia and compensatory mechanisms of the cardiovascular system (i.e. increase of total peripheral resistance, increase of systolic blood-pressure, left-ventricular enlargement) to maintain oxygen supply to oxygen sensitive organs such as the brain. All these changes may result in structural myocardial or subclinical brain alterations. Therefore, the aim of this study was to investigate mid-term effects of repetitive prolonged apnea using cardiac magnetic resonance imaging (CMR) and magnetic resonance imaging of the brain. MATERIALS AND METHODS 17 elite BH divers (15 males) were investigated at baseline, from whom 9 (7 males) were investigated again at follow-up one year later. CMR included functional imaging and tissue characterization using T1- and T2-mapping as well as late gadolinium enhancement. Results were compared intra-individually and with 50 age matched controls. RESULTS Mean BH time were 297 ± 52 s (entire cohort) and 315 ± 56 s (sub-cohort) at initial, and 334 ± 104 s at follow-up examination. Apnea resulted in a progressive increase of the left ventricle and impaired function, whichfully resolved after cessation of apnea. At rest, no dilation of the left ventricle was notable (LV-EDV: 106.7 ± 28.8 ml; LV-EDV/BSA: 52.2 ± 12.7 ml/m2). Compared to controls, the apnea group showed significantly lower volumes (LV-EDV: 106.7 ± 28.8 ml vs. 140.9 ± 36.3 ml, p = .008; LV-EDV/BSA: 52.2 ± 12.7 ml/m2 vs. 73.7 ± 12.8 ml/m2). In contrast, LV-EF showed no significant differences between both groups (61.0 ± 7.0% vs. 60.9 ± 3.6%). T1- and T2-mapping revealed no significant differences, neither intra-individually nor in comparison with age matched controls. (T1 pre-contrast: 974.1 ± 12.9 ms vs. 969.4 ± 29.0 ms, p = .2; T1 post-contrast: 368.9 ± 38.5 ms vs. 966.7 ± 40.5 ms, p = .4; ECV: 29.2 ± 1.5% vs. 29.8 ± 1.6%, p = .3; T2. 52 ± 2 ms vs. 52 ± 3 ms; p = .4). Except for one old embolic lesion no structural changes were found in brain imaging. CONCLUSION Although, prolonged apnea leads to impressive adaptions of the cardiovascular system (i.e. dilation of the left ventricle) and hypertension due to peripheral vasoconstriction no mid-term morphological changes could be observed in both, the myocardium and the brain. BH divers are suitable as a model to investigate acute physiological changes of prolonged apnea and hypoxemia, but not as a model for chronic alterations.
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Affiliation(s)
- J Doerner
- Department of Radiology, University Hospital Bonn, Bonn, Germany; Department of Radiology, University Hospital Cologne, Cologne, Germany.
| | - L Eichhorn
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - J A Luetkens
- Department of Radiology, University Hospital Bonn, Bonn, Germany
| | - J N Lunkenheimer
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - J Albers
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - J Nadal
- Medical Biometry, Information Technology and Epidemiology, University of Bonn, Bonn, Germany
| | - H H Schild
- Department of Radiology, University Hospital Bonn, Bonn, Germany
| | - C P Naehle
- Department of Radiology, University Hospital Bonn, Bonn, Germany; Department of Radiology, University Hospital Cologne, Cologne, Germany
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Reinisch B, Willems P, Albers J, Vahl C. Determinants of Survival in Patients with Extracorporeal Support. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627876] [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: 10/28/2022]
Affiliation(s)
- B. Reinisch
- Herz-, Thorax- und Gefäßchirurgie, Johannes Gutenberg Universität Mainz, Mainz, Germany
| | - P. Willems
- Herz-, Thorax- und Gefäßchirurgie, Johannes Gutenberg Universität Mainz, Mainz, Germany
| | - J. Albers
- Herz-, Thorax- und Gefäßchirurgie, Johannes Gutenberg Universität Mainz, Mainz, Germany
| | - C. Vahl
- Herz-, Thorax- und Gefäßchirurgie, Johannes Gutenberg Universität Mainz, Mainz, Germany
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Ghosh Moulick R, Afanasenkau D, Choi SE, Albers J, Lange W, Maybeck V, Utesch T, Offenhäusser A. Reconstitution of Fusion Proteins in Supported Lipid Bilayers for the Study of Cell Surface Receptor-Ligand Interactions in Cell-Cell Contact. Langmuir 2016; 32:3462-3469. [PMID: 26986674 DOI: 10.1021/acs.langmuir.5b04644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Bioactive molecules such as adhesion ligands, growth factors, or enzymes play an important role in modulating cell behavior such as cell adhesion, spreading, and differentiation. Deciphering the mechanism of ligand-mediated cell adhesion and associated signaling is of great interest not only for fundamental biophysical investigations but also for applications in medicine and biotechnology. In the presented work, we developed a new biomimetic platform that enables culturing primary neurons and testing cell surface-receptor ligand interactions in cell-cell contacts as, e.g., in neuronal synapses. This platform consists of a supported lipid bilayer modified with incorporated neuronal adhesion proteins conjugated with the Fc-domain of IgG (ephrin A5 Fc-chimera). We extensively characterized properties of these protein containing bilayers using fluorescence recovery after photobleaching (FRAP), quartz crystal microbalance with dissipation (QCM-D), and immunostaining. We conclude that the Fc-domain is the part responsible for the incorporation of the protein into the bilayer. The biomimetic platform prepared by this new approach was able to promote neuronal cell adhesion and maintain growth as well as facilitate neuronal maturation as shown by electrophysiological measurements. We believe that our approach can be extended to insert other proteins to create a general culture platform for neurons and other cell types.
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Affiliation(s)
- R Ghosh Moulick
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
| | - D Afanasenkau
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
| | - S-E Choi
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
| | - J Albers
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
| | - W Lange
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
| | - V Maybeck
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
| | - T Utesch
- Department of Chemistry, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - A Offenhäusser
- Institute for Bioelectronics (ICS-8), Forschungszentrum Jülich , Wilhelm-Johnen Straße, 52425 Jülich, Germany
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Fruscalzo A, Albers J, Londero AP, Steinhard J, Raila J, Nofer JR, Klockenbusch W, Schmitz R. TTR-RBP4-ROH-Komplex und antiangiogene Faktoren sFlt1und PlGF im mütterlichen Serum als Markers der fetalen Wachstumsrestriktion (FGR) im 1. Trimenon. Geburtshilfe Frauenheilkd 2015. [DOI: 10.1055/s-0035-1548682] [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: 10/23/2022] Open
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13
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Halbroth I, Conzelmann L, Bening C, Albers J, Vahl CF. Muscular Force and Intracellular Calcium Concentration in Patients with Aortic Valve Stenosis Undergoing Aortic Valve Replacement: Comparison of Patients with Low Gradient, Reduced Left Ventricular Function and High Gradient, Preserved Left Ventricular Function. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544359] [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: 10/24/2022]
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14
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Ister D, Schnelle N, Wohlhöfer M, Albers J, Vahl CF. Early administration of calcium sensitizer in cardiac surgery. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332309] [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: 10/27/2022]
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Weiler H, Moeller O, Wohlhoefer M, Conzelmann LO, Albers J, Vahl CF. Methylene blue reduces myocardial contractility. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297435] [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: 10/14/2022]
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Weiler H, Moeller O, Jungbecker J, Albers J, Abugameh A, Vahl CF. The effect of the multi purpose drug tolonium chloride on myocardial contractility. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297864] [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: 10/14/2022]
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Albers J, Niederstadt T, Ringelstein E, Dziewas R. Bilaterale Enzephalitis mit ungewöhnlicher Lokalisation durch Herpes simplex Virus Typ I – eine Komplikation immunsuppressiver Therapie. KLIN NEUROPHYSIOL 2011. [DOI: 10.1055/s-0030-1266118] [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: 10/17/2022]
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Albers J, Ister D, Kayhan N, Vahl CF. Postoperative non-invasive assessment of pulmonary vascular resistance using Doppler echocardiography. Interact Cardiovasc Thorac Surg 2011; 13:579-84. [DOI: 10.1510/icvts.2011.271619] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Denk K, Tzanova I, Karliova I, Ister D, Peivandi A, Albers J, Werner C, Vahl CF. Cardiac fast track anesthesia can contribute to an improved outcome in elderly patients undergoing minimally invasive aortic valve replacement. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269136] [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: 10/18/2022]
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Bening C, Conzelmann L, Kayhan N, Albers J, Peivandi A, Vahl CF. Minimal invasive access in surgery for aneurysms of the ascending aorta. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269340] [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: 10/18/2022]
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Denk K, Karliova I, Conzelmann L, Ewald P, Hakami L, Weigang E, Albers J, Vahl CF. Septic cardiomyopathy: Evidence for an impaired Frank-Starling mechanism (FSM) in acute endocarditis? Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269203] [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: 10/18/2022]
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Tütün E, Albers J, Peivandi A, Mehlhorn U, Vahl CF. Independent risk factors for in-hospital mortality after isolated coronary artery bypass graft (CABG): Clinical study in 513 patients. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269388] [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: 10/18/2022]
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Conzelmann L, Albers J, Thomé M, Farhangyar T, Hoffmann I, Peivandi A, Weigang E, Mehlhorn U, Vahl CF. Inflammatory focus in patients after surgery in acute aortic dissection type A. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269307] [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: 10/18/2022]
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Hissnauer TN, Baranowsky A, Pestka JM, Streichert T, Wiegandt K, Goepfert C, Beil FT, Albers J, Schulze J, Ueblacker P, Petersen JP, Schinke T, Meenen NM, Pörtner R, Amling M. Identification of molecular markers for articular cartilage. Osteoarthritis Cartilage 2010; 18:1630-8. [PMID: 20950698 DOI: 10.1016/j.joca.2010.10.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 09/22/2010] [Accepted: 10/04/2010] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The aim of the current study was to identify molecular markers for articular cartilage (AC) that can be used as tools for the quality control of tissue engineered (TE) cartilage. DESIGN A genome-wide expression analysis was performed using RNA isolated from articular and growth plate (GP) cartilage, both extracted from the knee joints of 6 weeks old minipigs. After confirming the specific expression for selected genes by RT-PCR, these were used as molecular markers for the quality control of TE cartilage. RESULTS Albeit several known chondrocyte markers were expressed to a similar extent in articular and GP cartilage, our genome-wide expression analysis led us to identify genes being selectively expressed in either GP or articular chondrocytes. These findings led us to perform a RT-PCR expression analysis for the corresponding genes to demonstrate the absence of GP-specific markers in TE cartilage, while common or AC markers were expressed. CONCLUSIONS Taken together, these results provide important novel insights into chondrocyte biology in general and AC in particular. In addition, it is reasonable to speculate, that some of the identified genes play distinct roles in the regulation of articular chondrocyte differentiation and/or function, thereby raising the possibility that they may serve as targets for non-operative therapies of osteoarthritis (OA).
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Affiliation(s)
- T N Hissnauer
- Department for Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Lombard C, Nosworthy A, Albers J. Opinions in hypertension. ARBs and risk of cancer: international and South African expert comment. Cardiovasc J Afr 2010; 21:338-41. [PMID: 21135984 PMCID: PMC6107719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- C Lombard
- Biostatistics Unit, Medical Research Council
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Albers J, Niederstadt T, Ringelstein E, Dziewas R, Dittrich R. Meningoenzephalitis durch Streptococcus pneumoniae mit diffusen Läsionen der weißen und grauen Substanz. KLIN NEUROPHYSIOL 2010. [DOI: 10.1055/s-0029-1223479] [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: 10/19/2022]
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27
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Seitz S, Barvencik F, Gebauer M, Albers J, Schulze J, Streichert T, Amling M, Schinke T. Preproenkephalin (Penk) is expressed in differentiated osteoblasts, and its deletion in Hyp mice partially rescues their bone mineralization defect. Calcif Tissue Int 2010; 86:282-93. [PMID: 20204609 DOI: 10.1007/s00223-010-9344-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2009] [Accepted: 02/15/2010] [Indexed: 10/19/2022]
Abstract
Although our understanding of the molecular mechanisms controlling osteoblast differentiation and function is steadily increasing, there are still many open questions, especially regarding the regulation of bone matrix mineralization. For instance, while there is hallmark evidence for the importance of the endopeptidase Phex, whose inactivation in Hyp mice or human patients causes X-linked hypophosphatemic rickets, it is still largely unknown how Phex controls bone mineralization since a physiological substrate for its endopeptidase activity has not been identified yet. Using a genome-wide expression analysis comparing primary calvarial osteoblasts, we have identified preproenkephalin (Penk) as a gene that is selectively expressed in mineralized cultures. Since a role of enkephalin in the regulation of bone remodeling has been suggested previously and since Leu-enkephalin is known to be cleaved by Phex, we analyzed whether Penk expression in osteoblasts is physiologically relevant. Through skeletal analysis of a Penk-deficient mouse model, we found that Penk expression is dispensable for bone development and remodeling since we could not detect any defect following nondecalcified bone histology and histomorphometry compared to wild-type littermates. When Penk was deleted in Phex-deficient Hyp mice, however, we observed a significant reduction of the osteoid enrichment at 24 weeks of age, whereas their disturbance of mineral homeostasis was not affected by the additional absence of the Penk gene. Taken together, our data provide the first in vivo analysis concerning the role of Penk in osteoblasts.
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Affiliation(s)
- S Seitz
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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List J, Wilbers E, Kürten J, Albers J, Schwindt A, Flöel A. Focal cortical plasticity in patients with high-grade stenosis of the internal carotid artery. KLIN NEUROPHYSIOL 2010. [DOI: 10.1055/s-0030-1250875] [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: 10/19/2022]
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Albers J, Ister D, Kayhan N, Peivandi AA, Vahl CF. Postoperative noninvasive assessment of pulmonary vascular resistance using doppler echocardiography. Thorac Cardiovasc Surg 2010. [DOI: 10.1055/s-0029-1246802] [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: 10/20/2022]
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Denk K, Karliova I, Conzelmann LO, Ewald P, Hakami L, Weigang E, Albers J, Vahl CF. Aortic or mitral valve insufficiency: increasing body weight reduces right atrial contractile performance. Thorac Cardiovasc Surg 2010. [DOI: 10.1055/s-0029-1247046] [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: 10/20/2022]
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Breitenstein C, Meinzer M, Mohammadi S, Schiffbauer H, Kugel H, Albers J, Menke R, Flöel A, Baumgärtner A, Kramer K, Knecht S, Deppe M. Integrität des Hippokampus prädiziert Verbesserungen der Benennleistung nach intensiver Sprachtherapie bei chronischer Aphasie. Akt Neurol 2009. [DOI: 10.1055/s-0029-1238417] [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: 10/20/2022]
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Glomset JA, Norum KR, Nichols AV, Forte T, King WC, Albers J, Mitchell CD, Applegate KR, Gjone E. Plasma Lipoprotein Metabolism in Familial Lecithin: Cholesterol Acyltransferase Deficiency. Scandinavian Journal of Clinical and Laboratory Investigation 2009. [DOI: 10.1080/00365517409100646] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jenniskens P, Shaddad MH, Numan D, Elsir S, Kudoda AM, Zolensky ME, Le L, Robinson GA, Friedrich JM, Rumble D, Steele A, Chesley SR, Fitzsimmons A, Duddy S, Hsieh HH, Ramsay G, Brown PG, Edwards WN, Tagliaferri E, Boslough MB, Spalding RE, Dantowitz R, Kozubal M, Pravec P, Borovicka J, Charvat Z, Vaubaillon J, Kuiper J, Albers J, Bishop JL, Mancinelli RL, Sandford SA, Milam SN, Nuevo M, Worden SP. The impact and recovery of asteroid 2008 TC(3). Nature 2009. [PMID: 19325630 DOI: 10.1038/nature07920.] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In the absence of a firm link between individual meteorites and their asteroidal parent bodies, asteroids are typically characterized only by their light reflection properties, and grouped accordingly into classes. On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554-995 nm wavelength range, and designated 2008 TC(3) (refs 4-6). It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. Here we report that a dedicated search along the approach trajectory recovered 47 meteorites, fragments of a single body named Almahata Sitta, with a total mass of 3.95 kg. Analysis of one of these meteorites shows it to be an achondrite, a polymict ureilite, anomalous in its class: ultra-fine-grained and porous, with large carbonaceous grains. The combined asteroid and meteorite reflectance spectra identify the asteroid as F class, now firmly linked to dark carbon-rich anomalous ureilites, a material so fragile it was not previously represented in meteorite collections.
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Affiliation(s)
- P Jenniskens
- SETI Institute, Carl Sagan Center, 515 North Whisman Road, Mountain View, California 94043, USA.
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Peivandi AA, Kayhan N, Albers J, Löffelholz K, Vahl CF. Phospholipases C and D in pressure-overload hypertrophy signaling pathway. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191419] [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: 10/21/2022]
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Albers J, Sanli E, Ister D, Vahl CF. Assessment of right ventricular myocardial performance using tissue doppler echocardiography. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191690] [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: 10/21/2022]
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Denk K, Albers J, Kayhan N, Ister D, Peivandi AA, Vahl CF. The length-dependent contractile performance (Frank-Starling Mechanism, FSM) is attenuated in overweight patients. Thorac Cardiovasc Surg 2009. [DOI: 10.1055/s-0029-1191702] [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: 10/21/2022]
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Albers P, Miller G, Orazi A, Ulbright T, Albers J, Foster R, Donohue J. Immunhistochemische Bestimmung der Tumorzellproliferation (MIB-1) und Volumen des Embryonalzellkarzinomanteils. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1057780] [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: 10/21/2022]
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Ister D, Kayhan N, Denk K, Peivandi AA, Albers J, Mehlhorn U, Vahl CF. Auf dem Weg zu einem detaillierteren Verständnis atrialer Rhythmusstörungen: Darstellung biphasischer Kalziumtransienten. Z Herz- Thorax- Gefäßchir 2008. [DOI: 10.1007/s00398-008-0606-8] [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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Sanli E, Albers J, Kayhan N, Peivandi AA, Mehlhorn U, Dahm M, Vahl CF. Intraoperative „physiological tests“ for the evaluation of complex mitral valve repair. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1038030] [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: 10/21/2022]
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Abstract
BACKGROUND Cisplatin and several related antineoplastic agents used to treat many types of solid tumors are neurotoxic, and most patients completing a full course of cisplatin chemotherapy develop a clinically detectable sensory neuropathy. Effective neuroprotective therapies have been sought. OBJECTIVES To examine the efficacy of purported chemoprotective agents to prevent or limit the neurotoxicity of cisplatin and related agents among human patients. SEARCH STRATEGY We searched the Cochrane Neuromuscular Disease Group Register (January 2005), the Cochrane Central Register of Controlled Trials (The Cochrane Library, Issue 1 2005), MEDLINE from (January 1966 to March 2005), EMBASE (from January 1980 to March 2005), LILACS (from January 1982 to March 2005), CINAHL (from January 1982 to March 2005) for randomized trials designed to evaluate neuroprotective agents used to prevent or limit neurotoxicity of cisplatin and related agents among human patients. SELECTION CRITERIA Quasi-randomized or randomized controlled trials whose participants received cisplatin (or related compounds) chemotherapy with or without a potential neuroprotectant (amifostine, diethyldithiocarbamate, glutathione, Org 2766, or vitamin E) and were evaluated zero to six months after completing chemotherapy using quantitative sensory testing (primary) or other measures including nerve conduction studies or neurological impairment rating using validated scales (secondary). DATA COLLECTION AND ANALYSIS We identified 16 randomized trials involving five possible chemoprotective agents. Each study was reviewed by two authors who extracted the data and reached consensus. The included trials involved five unrelated treatments and included many disparate measures of neuropathy, resulting in insufficient data for any one measure to combine the results in most instances. MAIN RESULTS The one of five eligible amifostine trials (541 participants) using quantitative sensory testing demonstrated a favorable outcome in terms of amifostine neuroprotection, but the subclinical result was based on 14 participants receiving amifostine. Of the five eligible glutathione trials (327 participants), one used quantitative sensory testing but reported only qualitative analyses. Four eligible Org 2766 trials (311 participants) employed quantitative sensory testing reported disparate results; meta-analyses of three trials using comparable measures showed no significant vibration perception threshold neuroprotection. The remaining trial reported only descriptive analyses. The one eligible diethyldithiocarbamate trial (214 participants) and the one eligible vitamin E trial (27 participants) did not perform quantitative sensory testing. AUTHORS' CONCLUSIONS At present, the data are insufficient to conclude if any of the purported neuroprotective agents (amifostine, diethyldithiocarbamate, glutathione, Org 2766, or Vitamin E) prevent or limit the neurotoxicity of platin drugs among human patients.
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Affiliation(s)
- J Albers
- University of Michigan, Department of Neurology, 1C325/0032 University Hospital, 1500 E. Medical Center Drive, Box 0316, Ann Arbor, MI 48109-0032, USA.
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Franken T, Rees W, Hübner N, Albers J, Gansera B, Uhl M, Niessner C, Sedemund-Adip B, Tödter T. Octaplex in routine clinical use for prophylaxis and therapy of bleeding in patients with prothrombin complex factor deficiency. Crit Care 2007. [PMCID: PMC4095429 DOI: 10.1186/cc5536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Kayhan N, Edler K, Albers J, Wahn B, Peivandi AA, Hagl S, Vahl CF. Frank Starling Mechanisms: Dangerous one-way road in failing human myocardium? Thorac Cardiovasc Surg 2007. [DOI: 10.1055/s-2007-967605] [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: 10/21/2022]
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Dharuman V, Nebling E, Grunwald T, Albers J, Blohm L, Elsholz B, Wörl R, Hintsche R. DNA hybridization detection on electrical microarrays using coulostatic pulse technique. Biosens Bioelectron 2006; 22:744-51. [PMID: 16574397 DOI: 10.1016/j.bios.2006.02.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 12/20/2005] [Revised: 02/14/2006] [Accepted: 02/20/2006] [Indexed: 11/17/2022]
Abstract
We demonstrated a novel application of transient coulostatic pulse technique for the detection of label free DNA hybridization on nm-sized gold interdigitated ultramicroelectrode arrays (Au-IDA) made in silicon technology. The array consists of eight different positions with an Au-IDA pair at each position arranged on the Si-based Biochip. Immobilization of capture probes onto the Au-IDA was accomplished by self-assembling of thiol-modified oligonucleotides. Target hybridization was indicated by a change in the magnitude of the time dependant potential relaxation curve in presence of electroactive Fe(CN)(6)(3-) in the phosphate buffer solution. While complementary DNA hybridization showed 50% increase in the relaxation potential, the non-complementary DNA showed a negligible change. A constant behaviour was noted for all positions. The dsDNA specific intercalating molecule, methylene blue, was found to be enhancing the discrimination effect. The changes in the relaxation potential curves were further corroborated following the ELISA like experiments using ExtraAvidine alkaline phosphatase labelling and redox recycling of para-aminophenol phosphate at IDAs. The coulostatic pulse technique was shown to be useful for identifying DNA sequences from brain tumour gene CK20, human herpes simplex virus, cytomegalovirus, Epstein-Barr virus and M13 phage. Compared to the hybridization of short chain ONTs (27 mers), the hybridization of long chain M13 phage DNA showed three times higher increase in the relaxation curves. The method is fast enough to monitor hybridization interactions in milli or microsecond time scales and is well suitable for miniaturization and integration compared to the common impedance techniques for developing capacitative DNA sensors.
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Affiliation(s)
- V Dharuman
- Department of Biotechnical Microsystems, Fraunhofer Institute for Silicon Technology, Fraunhoferstrasse 1, D-25524 Itzehoe, Germany
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Elsholz B, Wörl R, Blohm L, Albers J, Feucht H, Grunwald T, Jürgen B, Schweder T, Hintsche R. Automated Detection and Quantitation of Bacterial RNA by Using Electrical Microarrays. Anal Chem 2006; 78:4794-802. [PMID: 16841897 DOI: 10.1021/ac0600914] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.4] [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: 11/28/2022]
Abstract
Low-density electrical 16S rRNA specific oligonucleotide microarrays and an automated analysis system have been developed for the identification and quantitation of pathogens. The pathogens are Escherichia coli, Pseudomonas aeruginosa, Enterococcus faecalis, Staphylococcus aureus, and Staphylococcus epidermidis, which are typically involved in urinary tract infections. Interdigitated gold array electrodes (IDA-electrodes), which have structures in the nanometer range, have been used for very sensitive analysis. Thiol-modified oligonucleotides are immobilized on the gold IDA as capture probes. They mediate the specific recognition of the target 16S rRNA by hybridization. Additionally three unlabeled oligonucleotides are hybridized in close proximity to the capturing site. They are supporting molecules, because they improve the RNA hybridization at the capturing site. A biotin labeled detector oligonucleotide is also allowed to hybridize to the captured RNA sequence. The biotin labels enable the binding of avidin alkaline phophatase conjugates. The phosphatase liberates the electrochemical mediator p-aminophenol from its electrically inactive phosphate derivative. The electrical signals were generated by amperometric redox cycling and detected by a unique multipotentiostat. The read out signals of the microarray are position specific current and change over time in proportion to the analyte concentration. If two additional biotins are introduced into the affinity binding complex via the supporting oligonucleotides, the sensitivity of the assays increase more than 60%. The limit of detection of Escherichia coli total RNA has been determined to be 0.5 ng/microL. The control of fluidics for variable assay formats as well as the multichannel electrical read out and data handling have all been fully automated. The fast and easy procedure does not require any amplification of the targeted nucleic acids by PCR.
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Affiliation(s)
- B Elsholz
- Fraunhofer Institute for Silicon Technology (ISiT), Fraunhoferstrasse 1, D-25524 Itzehoe, Germany.
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Schabmueller CGJ, Loppow D, Piechotta G, Schütze B, Albers J, Hintsche R. Micromachined sensor for lactate monitoring in saliva. Biosens Bioelectron 2006; 21:1770-6. [PMID: 16289607 DOI: 10.1016/j.bios.2005.09.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [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: 04/27/2005] [Revised: 08/18/2005] [Accepted: 09/08/2005] [Indexed: 11/23/2022]
Abstract
A miniaturised sensor for continuous lactate measurement in saliva was developed and tested. The sensor was built using silicon microfabrication technologies. The size of the chip is 5.5 mmx6.4 mmx0.7 mm and features a working, a counter and an Iridium reference electrode. The chip has a cavity whose floor is perforated by fine pores. The cavity contains the enzyme lactate oxidase (LOD), which is immobilised in an agarose gel. Prior to the amperometric detection of the reaction product hydrogen peroxide at the working electrode, the analyte lactate has to pass the pores to reach the cavity with the lactate oxidase by diffusion. To test the silicon sensor, capillary blood and saliva samples were obtained during standardised ergometer tests. Salivary lactate concentrations were determined with the sensor and compared to photometrically derived data from a lab-automate. In addition the saliva data were compared to standard capillary blood lactate concentrations measured with a pocket photometer. Lactate concentration versus load graphs were plotted and compared visually showing very similar progressions. The novel approach enables a location independent, permanent real-time measurement of the lactate concentration during exercise.
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Affiliation(s)
- C G J Schabmueller
- Fraunhofer Institut for Silicon Technology, Fraunhoferstrasse 1, 25524 Itzehoe, Germany
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Piechotta G, Albers J, Hintsche R. Novel micromachined silicon sensor for continuous glucose monitoring. Biosens Bioelectron 2006; 21:802-8. [PMID: 16242621 DOI: 10.1016/j.bios.2005.02.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [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: 11/23/2004] [Revised: 02/14/2005] [Accepted: 02/15/2005] [Indexed: 11/28/2022]
Abstract
The construction and the application properties of a micro-machined silicon sensor for continuous glucose monitoring are presented. The sensor uses the conventional enzymatic conversion of glucose with amperometric detection of H(2)O(2). The innovation is the precise diffusion control of the analyte through a porous silicon membrane into a silicon etched cavity containing the immobilised enzyme. A variation of the number and size of the membrane pores allows to adjust the linear range of the sensor to the respective requirement. The sensor was tested in vitro as well as in clinical studies, being supplied with interstitial fluid. The cavity sensor was designed for a linear range between 0.5 and 20 mM. A signal response time of below 30 s and a signal stability exceeding 1 week is shown. By using a double cavity sensor falsification of the glucose signal by interfering substances can be compensated. In clinical trials the sensor measured continuously in interstitial fluid for up to 18 h without any signal drift and with good correlation to blood glucose reference values.
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Affiliation(s)
- G Piechotta
- Fraunhofer Institute for Silicon Technology, Fraunhoferstr. 1, 25524 Itzehoe, Germany.
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Andrasi TB, Stumpf NA, Reinerth G, Albers J, Hake U, Vahl CF. Pulmonary release of ET-1 during surgical procedures involving right ventricular pressure overload contributes to postoperative mesenteric vascular dysfunction. Thorac Cardiovasc Surg 2006. [DOI: 10.1055/s-2006-925716] [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: 10/19/2022]
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Dharuman V, Grunwald T, Nebling E, Albers J, Blohm L, Hintsche R. Label-free impedance detection of oligonucleotide hybridisation on interdigitated ultramicroelectrodes using electrochemical redox probes. Biosens Bioelectron 2005; 21:645-54. [PMID: 16202878 DOI: 10.1016/j.bios.2004.12.020] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [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: 10/18/2004] [Revised: 12/22/2004] [Accepted: 12/23/2004] [Indexed: 11/29/2022]
Abstract
The direct detection of oligodeoxynucleotide (ODN) hybridisation using electrochemical impedance spectroscopy was made on interdigitated array (IDA) gold (Au) ultramicroelectrodes manufactured by silicon technology. The immobilisation of single stranded ODNs (ssODNs) was accomplished by self-assembling of thiol-modified ODNs onto an Au-electrode surface. Faradaic impedance was measured in the presence of K(3)[Fe(CN)(6)]. Double strand formation was identified by a decrease of approximately 50% in impedance in the low frequency region in the presence of K(3)[Fe(CN)(6)], compared to the spectrum of single stranded ODN. The frequency dependent diffusion of Fe(CN)(6)(3-) ions through defects in the ODN monolayer determines the impedance of Au-ssODN surface. The influence of DNA intercalator methylene blue on the impedance of both, single and double strands, was examined along with K(3)[Fe(CN)(6)] and confirmed by cyclic voltammetry. The layer densities and the hybridisation have been further corroborated by chronoamperometric redox recycling of para-aminophenol (p-AP) in ELISA like experiments. It can be concluded, that a performed impedance spectroscopy did not change the layer density. The impedance spectroscopy at ultramicroelectrodes combined with faradaic redox reactions enhances the impedimetric detection of DNA hybridisation on IDA platforms.
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Affiliation(s)
- V Dharuman
- Department of Biotechnical Microsystems, BTMS, Fraunhofer Institute of Silicon Technology, BTMS, Fraunhoferstrasse 1, D-25524 Itzehoe, Germany
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Łoś M, Łoś JM, Blohm L, Spillner E, Grunwald T, Albers J, Hintsche R, Wegrzyn G. Rapid detection of viruses using electrical biochips and anti-virion sera. Lett Appl Microbiol 2005; 40:479-85. [PMID: 15892746 DOI: 10.1111/j.1472-765x.2005.01706.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 11/29/2022]
Abstract
AIMS Rapid detection and quantification of viruses is crucial in clinical practice, veterinary medicine, agriculture, basic research as well as in biotechnological factories. However, although various techniques were described and are currently used, development of more rapid, more sensitive and quantitative methods seems to be still important. METHODS AND RESULTS Here we describe a method for rapid detection of viruses (using bacteriophages as model viruses), based on electrical biochip array technology with the use of antibodies against capsid proteins. CONCLUSIONS Using the procedure developed in this work, we were able to detect 2 x 10(4) virions on the chip. The whole assay procedure takes c. 50 min and the assay is quantitative. SIGNIFICANCE AND IMPACT OF THE STUDY This procedure may be useful in various approaches, including detection of bacteriophage contamination in bioreactors and possibly detection of toxin gene-bearing phages or other viruses in food samples.
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Affiliation(s)
- M Łoś
- Department of Molecular Biology, University of Gdańsk, Gdańsk, Poland
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