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Dohner E, Kierdorf F, Moreno P, Langer R, Zuber M, Fahrner R. Neurogenic appendicopathy: A rare differential diagnosis of acute appendicitis. J Visc Surg 2024; 161:15-20. [PMID: 36841641 DOI: 10.1016/j.jviscsurg.2023.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
AIM OF THE STUDY In histologically non-inflamed but clinically suspect appendices, changes described as neurogenic appendicopathy with fibrous or fibrolipomatous obliterations can be observed. The purpose of this study was to analyse the incidence of these entities of the appendix in a longitudinal patient cohort. PATIENTS AND METHODS This is a retrospective single-centre study of 457 patients undergoing laparoscopic appendectomy from 2017 to 2020 due to suspected acute appendicitis. RESULTS In 72 patients (15.8%) with clinically suspected acute appendicitis, the appendix showed no distinct signs of acute inflammation during the procedure. In 43 patients, histological analysis revealed neurogenic appendicopathy or fibrous and fibrolipomatous obliteration. Female gender (P=0.088), younger age (P<0.0001), longer pain duration (P<0.0001) and repetitive pain episodes were more frequent in these patients than in those with acute appendicitis. Inflammation markers were also decreased in the group of patients with neurogenic appendicopathy (leukocytes 9.8±3.5 vs. 13.0±4.5 G/L and C-reactive protein 38.7±60.7 vs. 59.4±70.5mg/L). CONCLUSION Neurogenic appendicopathy with fibrous/fibrolipomatous obliteration is a differential diagnosis of acute appendicitis that can only be confirmed by pathology. Female gender, young age, prolonged duration with repetitive episodes of pain, and relatively low inflammatory markers are evocative of this diagnosis.
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Affiliation(s)
- E Dohner
- Department of Surgery, Bürgerspital Solothurn, Solothurn, Switzerland
| | - F Kierdorf
- Department of Surgery, Bürgerspital Solothurn, Solothurn, Switzerland
| | - P Moreno
- Department of Surgery, Bürgerspital Solothurn, Solothurn, Switzerland
| | - R Langer
- Institute of Pathology and Molecular Pathology, Kepler University Hospital and Johannes Kepler University, Linz, Austria
| | - M Zuber
- Department of Surgery, Bürgerspital Solothurn, Solothurn, Switzerland; Clarunis University Center for Gastrointestinal and Liver Diseases, Saint-Clara Hospital Basel and University Hospital Basel, Basel, Switzerland
| | - R Fahrner
- Department of Surgery, Bürgerspital Solothurn, Solothurn, Switzerland; Department of Surgery, Hospital Thun, Thun, Switzerland.
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Som A, Wehrenberg-Klee E, Rosenboom J, Chandler A, Ndakwah G, Kim J, Feig V, Marcos-Vidal A, Fintelmann F, Basu A, Langer R, Traverso G, Mahmood U. Abstract No. 4 ▪ FEATURED ABSTRACT Image-Guided Intratumoral Cancer Vaccine to Treat Metastatic Immunotherapy Resistant Cancer with and without Cryoablation. J Vasc Interv Radiol 2023. [DOI: 10.1016/j.jvir.2022.12.043] [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: 02/27/2023] Open
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Langer R, Thanner M. Pharmacists' attitudes toward influenza vaccination: does the COVID-19 pandemic make a difference? Explor Res Clin Soc Pharm 2023; 9:100235. [PMID: 36816546 PMCID: PMC9925413 DOI: 10.1016/j.rcsop.2023.100235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 01/26/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Background Influenza vaccine uptake in most European countries remains low, despite the World Health Organization's target of 75%. Community pharmacists play a vital role in promoting vaccination; however, they have been reported to be vaccine-hesitant. This study aimed to investigate changes in pharmacists' attitudes toward influenza vaccination since the onset of the COVID-19 pandemic, as well as their COVID-19 vaccination intentions. Methods In December 2020, all members of the Swiss Association of Pharmacists were invited to participate in an online, cross-sectional survey. This study assessed pharmacists' attitudes toward influenza vaccination by surveying influenza vaccine uptake during the 2019-20 influenza season and possible reasons for their decision(s), in addition to their intention to receive COVID-19 and seasonal influenza vaccination(s) during the 2020-21 influenza season. Descriptive analysis and multinomial logistic regression were used to assess predictors of vaccine uptake and intention. Results Of 5900 Swiss pharmacists, 569 (9.6%) completed the survey. The self-reported influenza vaccination coverage among pharmacists during the 2019-20 season was 48.0%. The primary reason for vaccine uptake was the belief that all healthcare workers should be vaccinated, whereas the main reason for refusal was a lack of concern about contracting influenza. The proportions of participants who intend to accept influenza and COVID-19 vaccinations in the 2020-2021 season, when available, were 63.3% and 66.5%, respectively. The most important predictor of high willingness to be vaccinated against influenza in 2020-21 was vaccination history (OR = 3.73; 95% CI = 1.47-9.50), while the most critical predictor of willingness to be vaccinated against COVID-19 was the intention to be vaccinated against influenza (OR = 3.45; 95% CI = 1.74-6.84). Conclusions Findings indicated that although pharmacists' readiness to accept seasonal influenza vaccination significantly increased during the COVID-19 pandemic, influenza vaccine uptake among them remains suboptimal. This is consistent with what has been reported in the literature.
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Affiliation(s)
- Roland Langer
- Department of Medical Sciences, Private University in the Principality of Liechtenstein (UFL), Triesen, Principality of Liechtenstein,Corresponding author.
| | - Mirjam Thanner
- Frauenklinik, Kantonsspital St. Gallen, St. Gallen, Switzerland
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Athauda A, Nankivell M, Pritchard S, Langer R, Langley R, Von Loga K, Starling N, Chau I, Cunningham D, Grabsch H. SO-9 Pathological primary tumour and lymph node regression following neoadjuvant chemotherapy in resectable oesophagogastric cancer: Pooled analysis of 1619 patients from two randomised trials. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.408] [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: 11/01/2022] Open
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Echle A, Ghaffari Laleh N, Quirke P, Grabsch HI, Muti HS, Saldanha OL, Brockmoeller SF, van den Brandt PA, Hutchins GGA, Richman SD, Horisberger K, Galata C, Ebert MP, Eckardt M, Boutros M, Horst D, Reissfelder C, Alwers E, Brinker TJ, Langer R, Jenniskens JCA, Offermans K, Mueller W, Gray R, Gruber SB, Greenson JK, Rennert G, Bonner JD, Schmolze D, Chang-Claude J, Brenner H, Trautwein C, Boor P, Jaeger D, Gaisa NT, Hoffmeister M, West NP, Kather JN. Artificial intelligence for detection of microsatellite instability in colorectal cancer-a multicentric analysis of a pre-screening tool for clinical application. ESMO Open 2022; 7:100400. [PMID: 35247870 PMCID: PMC9058894 DOI: 10.1016/j.esmoop.2022.100400] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [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: 08/27/2021] [Revised: 01/18/2022] [Accepted: 01/21/2022] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Microsatellite instability (MSI)/mismatch repair deficiency (dMMR) is a key genetic feature which should be tested in every patient with colorectal cancer (CRC) according to medical guidelines. Artificial intelligence (AI) methods can detect MSI/dMMR directly in routine pathology slides, but the test performance has not been systematically investigated with predefined test thresholds. METHOD We trained and validated AI-based MSI/dMMR detectors and evaluated predefined performance metrics using nine patient cohorts of 8343 patients across different countries and ethnicities. RESULTS Classifiers achieved clinical-grade performance, yielding an area under the receiver operating curve (AUROC) of up to 0.96 without using any manual annotations. Subsequently, we show that the AI system can be applied as a rule-out test: by using cohort-specific thresholds, on average 52.73% of tumors in each surgical cohort [total number of MSI/dMMR = 1020, microsatellite stable (MSS)/ proficient mismatch repair (pMMR) = 7323 patients] could be identified as MSS/pMMR with a fixed sensitivity at 95%. In an additional cohort of N = 1530 (MSI/dMMR = 211, MSS/pMMR = 1319) endoscopy biopsy samples, the system achieved an AUROC of 0.89, and the cohort-specific threshold ruled out 44.12% of tumors with a fixed sensitivity at 95%. As a more robust alternative to cohort-specific thresholds, we showed that with a fixed threshold of 0.25 for all the cohorts, we can rule-out 25.51% in surgical specimens and 6.10% in biopsies. INTERPRETATION When applied in a clinical setting, this means that the AI system can rule out MSI/dMMR in a quarter (with global thresholds) or half of all CRC patients (with local fine-tuning), thereby reducing cost and turnaround time for molecular profiling.
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Affiliation(s)
- A Echle
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - N Ghaffari Laleh
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - P Quirke
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK
| | - H I Grabsch
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK; Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - H S Muti
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - O L Saldanha
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - S F Brockmoeller
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK
| | - P A van den Brandt
- Department of Epidemiology, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - G G A Hutchins
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK
| | - S D Richman
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK
| | - K Horisberger
- Department of Abdominal and Transplantation Surgery, University Hospital of Zurich, Zurich, Switzerland
| | - C Galata
- Department of Surgery, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Division of Thoracic Surgery, Academic Thoracic Center Mainz, University Medical Center Mainz, Johannes Gutenberg University Mainz, Mainz, Germany
| | - M P Ebert
- Department of Medicine II, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Mannheim Institute for Innate Immunoscience (MI3) and Clinical Cooperation Unit Healthy Metabolism, Center of Preventive Medicine and Digital Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Mannheim Cancer Center, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - M Eckardt
- Department of Medicine II, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - M Boutros
- Division of Signaling and Functional Genomics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - D Horst
- Institut für Pathologie Charité, Berlin, Germany
| | - C Reissfelder
- Department of Surgery, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - E Alwers
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - T J Brinker
- Digital Biomarkers for Oncology Group, National Center for Tumor Diseases (NCT), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - R Langer
- Institute of Pathology, Inselspital, University of Bern, Bern, Switzerland
| | - J C A Jenniskens
- Department of Epidemiology, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - K Offermans
- Department of Epidemiology, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - W Mueller
- Gemeinschaftspraxis Pathologie, Starnberg, Germany
| | - R Gray
- Clinical Trial Service Unit, University of Oxford, Oxford, UK
| | - S B Gruber
- Center for Precision Medicine and Department of Medical Oncology, City of Hope National Medical Center, Duarte, USA
| | - J K Greenson
- Department of Pathology, City of Hope Comprehensive Cancer Center, Duarte, USA
| | - G Rennert
- Department of Community Medicine & Epidemiology, Lady Davis Carmel Medical Center, Ruth & Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel; Steve and Cindy Rasmussen Institute for Genomic Medicine, Lady Davis Carmel Medical Center and Technion Faculty of Medicine, Clalit National Cancer Control Center, Haifa, Israel
| | - J D Bonner
- Center for Precision Medicine and Department of Medical Oncology, City of Hope National Medical Center, Duarte, USA
| | - D Schmolze
- Department of Pathology, City of Hope Comprehensive Cancer Center, Duarte, USA
| | - J Chang-Claude
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; Cancer Epidemiology Group, University Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - H Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany; Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany; German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - C Trautwein
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - P Boor
- Institute of Pathology, University Hospital RWTH Aachen, Aachen, Germany; Department of Nephrology and Immunology, University Hospital RWTH Aachen, Aachen, Germany
| | - D Jaeger
- Medical Oncology, National Center for Tumor Diseases (NCT), University Hospital Heidelberg, Heidelberg, Germany
| | - N T Gaisa
- Institute of Pathology, University Hospital RWTH Aachen, Aachen, Germany
| | - M Hoffmeister
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - N P West
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK
| | - J N Kather
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany; Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK; Medical Oncology, National Center for Tumor Diseases (NCT), University Hospital Heidelberg, Heidelberg, Germany.
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Langer R, Thanner M. Influenza vaccination coverage of pharmacists in the light of the COVID-19 pandemic. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1732056] [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: 10/20/2022]
Affiliation(s)
- R Langer
- Private University of the Principality of Liechtenstein
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Langer R, Vazoukis G. Qualification of materials for light water reactors / Qualifizierung von Werkstoffen für Leichtwasserreaktoren. KERNTECHNIK 2021. [DOI: 10.1515/kern-1990-550610] [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: 11/15/2022]
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Vazoukis G, Langer R. Covering of the complete fracture toughness KIC versus temperature curve using measured values in its lower shelf region / Erfassung des Gesamtverlaufs der Bruchzähigkeits-Temperatur- Kurve bei Vorliegen von Meßwerten in ihrem unteren Bereich. KERNTECHNIK 2021. [DOI: 10.1515/kern-1992-570605] [Citation(s) in RCA: 1] [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: 11/15/2022]
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Schwerdt HN, Amemori K, Gibson DJ, Stanwicks LL, Yoshida T, Bichot NP, Amemori S, Desimone R, Langer R, Cima MJ, Graybiel AM. Dopamine and beta-band oscillations differentially link to striatal value and motor control. Sci Adv 2020; 6:6/39/eabb9226. [PMID: 32978148 PMCID: PMC7518859 DOI: 10.1126/sciadv.abb9226] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 08/13/2020] [Indexed: 05/08/2023]
Abstract
Parkinson's disease is characterized by decreased dopamine and increased beta-band oscillatory activity accompanying debilitating motor and mood impairments. Coordinate dopamine-beta opposition is considered a normative rule for basal ganglia function. We report a breakdown of this rule. We developed multimodal systems allowing the first simultaneous, chronic recordings of dopamine release and beta-band activity in the striatum of nonhuman primates during behavioral performance. Dopamine and beta signals were anticorrelated over seconds-long time frames, in agreement with the posited rule, but at finer time scales, we identified conditions in which these signals were modulated with the same polarity. These measurements demonstrated that task-elicited beta suppressions preceded dopamine peaks and that relative dopamine-beta timing and polarity depended on reward value, performance history, movement, and striatal domain. These findings establish a new view of coordinate dopamine and beta signaling operations, critical to guide novel strategies for diagnosing and treating Parkinson's disease and related neurodegenerative disorders.
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Affiliation(s)
- H N Schwerdt
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA.
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - K Amemori
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - D J Gibson
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - L L Stanwicks
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - T Yoshida
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - N P Bichot
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - S Amemori
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - R Desimone
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA
| | - R Langer
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - M J Cima
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - A M Graybiel
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street, Cambridge, MA 02139, USA.
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Kerckhoffs KGP, Liu DHW, Saragoni L, van der Post RS, Langer R, Bencivenga M, Iglesias M, Gallo G, Hewitt LC, Fazzi GE, Vos AM, Renaud F, Yoshikawa T, Oshima T, Tomezzoli A, de Manzoni G, Arai T, Kushima R, Carneiro F, Grabsch HI. Mucin expression in gastric- and gastro-oesophageal signet-ring cell cancer: results from a comprehensive literature review and a large cohort study of Caucasian and Asian gastric cancer. Gastric Cancer 2020; 23:765-779. [PMID: 32488651 PMCID: PMC7438382 DOI: 10.1007/s10120-020-01086-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/14/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND The literature on the prognostic relevance of signet-ring cell (SRC) histology in gastric cancer (GC) is controversial which is most likely related to inconsistent SRC classification based on haematoxylin-eosin staining. We hypothesised that mucin stains can consistently identify SRC-GC and predict GC patient outcome. METHODS We performed a comprehensive literature review on mucin stains in SRC-GC and characterised the mucin expression in 851 Caucasian GC and 410 Asian GC using Alcian Blue (AB)-Periodic Acid-Schiff (PAS), MUC2 (intestinal-type mucin), and MUC5AC (gastric-type mucin). The relationship between mucin expression and histological phenotype [poorly cohesive (PC) including proportion of SRCs, non-poorly cohesive (non-PC), or mucinous (MC)], clinicopathological variables, and patient outcome was analysed. RESULTS Depending on mucin expression and cut-offs, the positivity rates of SRC-GC reported in the literature varied from 6 to 100%. Patients with MUC2 positive SRC-GC or SRC-GC with (gastro)intestinal phenotype had poorest outcome. In our cohort study, PC with ≥ 10% SRCs expressed more frequently MUC2, MUC5AC, and ABPAS (p < 0.001, p = 0.004 and p < 0.001, respectively). Caucasians with AB positive GC or combined ABPAS-MUC2 positive and MUC5AC negative had poorest outcome (all p = 0.002). This association was not seen in Asian patients. CONCLUSIONS This is the first study to suggest that mucin stains do not help to differentiate between SRC-GC and non-SRC-GC. However, mucin stains appear to be able to identify GC patients with different outcome. To our surprise, the relationship between outcome and mucin expression seems to differ between Caucasian and Asian GC patients which warrants further investigations.
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Affiliation(s)
- K G P Kerckhoffs
- Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, P. Debyelaan 25, 6229HX, Maastricht, The Netherlands
| | - D H W Liu
- Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, P. Debyelaan 25, 6229HX, Maastricht, The Netherlands
| | - L Saragoni
- Pathology Unit, Morgagni-Pierantoni Hospital, Forlì, Italy
| | | | - R Langer
- Institute of Pathology, University of Bern, Bern, Switzerland
| | - M Bencivenga
- Unit of General and Upper GI Surgery , University of Verona, Verona, Italy
| | - M Iglesias
- Pathology Department, Hospital del Mar, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - G Gallo
- Department of Anatomic Pathology, Azienda Ospedaliero-Universitaria Policlinico di Modena, Modena, Italy
| | - L C Hewitt
- Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, P. Debyelaan 25, 6229HX, Maastricht, The Netherlands
| | - G E Fazzi
- Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, P. Debyelaan 25, 6229HX, Maastricht, The Netherlands
| | - A M Vos
- Department of Pathology, Radboudumc, Nijmegen, The Netherlands
| | - F Renaud
- Department of Pathology, Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020 - UMR-S 1277 - Canther - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Lille, France
| | - T Yoshikawa
- Department of Gastric Surgery, National Cancer Center Hospital, Tokyo, Japan
| | - T Oshima
- Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama, Japan
| | - A Tomezzoli
- Department of Pathology, Verona University Hospital, Verona, Italy
| | - G de Manzoni
- Unit of General and Upper GI Surgery , University of Verona, Verona, Italy
| | - T Arai
- Department of Pathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - R Kushima
- Department of Pathology, Shiga University of Medical Science, Shiga, Japan
| | - F Carneiro
- Institute of Molecular Pathology and Immunology at the University of Porto (Ipatimup), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Pathology Department, Centro Hospitalar de São João and Faculty of Medicine, Porto, Portugal
| | - H I Grabsch
- Department of Pathology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, P. Debyelaan 25, 6229HX, Maastricht, The Netherlands.
- Division of Pathology and Data Analytics, Leeds Institute of Medical Research at St. James's, University of Leeds, Leeds, UK.
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Bläker H, Langer R. [Meeting of the Gastroenteropathology Working Group of the German Society for Pathology : 103rd Annual Meeting of the German Society for Pathology, 13 June 2019, Frankfurt am Main]. Pathologe 2019; 40:376-377. [PMID: 31705234 DOI: 10.1007/s00292-019-00703-9] [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] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- H Bläker
- Institut für Pathologie, Universitätsklinikum Leipzig, Liebigstr. 26, 04103, Leipzig, Deutschland.
| | - R Langer
- Institut für Pathologie, Universität Bern, Murtenstr. 31, 3010, Bern, Schweiz.
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Ruhstaller T, Langer R, Thuss-Patience P, Eisterer W, Stahl M. Reply to the letter to the editor 'Anti-EGFR therapy in oesophagogastric cancer: precise but not enough' by M. Salati and S. Cascinu. Ann Oncol 2018; 29:2026. [PMID: 32138979 DOI: 10.1093/annonc/mdy238] [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: 11/13/2022] Open
Affiliation(s)
- T Ruhstaller
- Department of Oncology and Haematology, Cantonal Hospital of St. Gallen, St. Gallen.
| | - R Langer
- Institute of Pathology, University Hospital of Berne, Berne, Switzerland
| | - P Thuss-Patience
- Department of Haematology, Oncology and Tumorimmunology, University Medicine, Berlin, Germany
| | - W Eisterer
- Medical Department, Medical University, Innsbruck, Austria
| | - M Stahl
- Medical Oncology, Kliniken Essen-Mitte, Essen, Germany
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Lemmens HP, Blumhardt G, Neuhaus P, Keck H, Tsiblakis N, Rossaint R, Langer R, Steffen R. Technique of arterial anastomosis in liver transplantation, surgical management in routine situations and anatomical variations. Transpl Int 2018. [DOI: 10.1111/tri.1992.5.s1.198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
An extracorporeal circuit incorporating a plasma separator reactor (PSR) was designed to modify low density lipoproteins (LDL). The PSR was tested in vivo with hypercholesterolemic New Zealand White rabbits. The bioreactor enzymatically converts LDL to a form that can be removed by the body at an enhanced rate. The physiological response of hypercholesterolemic New Zealand White rabbits to 90 minute extracorporeal treatments was monitored. The total plasma cholesterol concentration in the treated rabbits fell sharply (up to 40% decrease) during and following the treatment. Results of safety tests indicate no significant enzyme leaching from the device, no disruption or damage to erythrocytes, no increase in white blood cell count and no liver damage as indicated by five enzyme assays. All safety measurements suggest that the treatment is safe.
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Affiliation(s)
- S.D. Shefer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge
| | - J. Ferreira
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge
| | | | - R. Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge
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15
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Luo X, Wang W, Dorkin JR, Veiseh O, Chang PH, Abutbul-Ionita I, Danino D, Langer R, Anderson DG, Dong Y. Poly(glycoamidoamine) brush nanomaterials for systemic siRNA delivery in vivo. Biomater Sci 2018; 5:38-40. [PMID: 27921096 DOI: 10.1039/c6bm00683c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Delivery is the key challenge for siRNA based therapeutics. Here, we report the development of new poly(glycoamidoamine) brush nanomaterials for efficient siRNA delivery. GluN4C10 polymer brush nanoparticles, a lead material, demonstrated significantly improved delivery efficiency for siRNA against factor VII (FVII) in mice compared to poly(glycoamidoamine) brush nanomaterials reported previously.
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Affiliation(s)
- X Luo
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA.
| | - W Wang
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. and Department of Anesthesiology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA
| | - J R Dorkin
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - O Veiseh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. and Department of Anesthesiology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA and Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - P H Chang
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. and Department of Anesthesiology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA
| | - I Abutbul-Ionita
- Department of Biotechnology and Food Engineering, Technion Institute of Technology and the Russell Berrie Nanotechnology Institute, Haifa 32000, Israel
| | - D Danino
- Department of Biotechnology and Food Engineering, Technion Institute of Technology and the Russell Berrie Nanotechnology Institute, Haifa 32000, Israel
| | - R Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. and Department of Anesthesiology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA and Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA and Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - D G Anderson
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. and Department of Anesthesiology, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA and Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA and Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Y Dong
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA. and Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA and The Center for Clinical and Translational Science, The Ohio State University, Columbus, OH 43210, USA and The Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
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16
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Abstract
We have investigated and quantified the degree of fibrovascular tissue ingrowth in cylindrical poly(vinyl alcohol) (PVA) foams of 12.5 mm diameter, 5 mm thickness, and 71% porosity implanted in the mesentery of rats over a period of 25 days. Fibrovascular tissue penetrated the center of PVA foams 5 days postimplantation yet the void fraction available for cell seeding was 55% and the volume average pore diameter was 190 (±39) μm. By 10 days postimplantation the void fraction had decreased to 32% and the volume average pore diameter was 121 (±20) μm. As time elapsed fibrovascular tissue continued to expand and fill the remaining pore space. At 15 days postimplantation the void space was impractical for cell seeding and continued to decrease through the remainder of the study. Our data suggest that hydrogel foams with a polydispersed pore morphology can be prevascularized with adequate space for cell seeding as the volume of tissue penetrating the foam is limited by the smaller pores in the foam structure; however, available void space for cell seeding decreases with time.
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Affiliation(s)
- M C Wake
- Department of Chemical Engineering, Rice University, Houston, TX 77251-1892, USA
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17
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Yu D, Khan OF, Suvà ML, Panek WK, Wu M, Han Y, Ahmed AU, Balyasnikova IV, Anderson DG, Langer R, Lesniak MS. OS06.2 Combination RNAi therapy against glioma stem cells via sustained lipopolymeric nanoparticle delivery delays tumor progression. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.036] [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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18
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Kákona M, Ploc O, Kyselová D, Kubančák J, Langer R, Kudela K. Investigation on contribution of neutron monitor data to estimation of aviation doses. Life Sci Space Res (Amst) 2016; 11:24-28. [PMID: 27993190 DOI: 10.1016/j.lssr.2016.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/07/2016] [Accepted: 11/08/2016] [Indexed: 06/06/2023]
Abstract
Recently, many efforts have appeared to routinely measure radiation exposure (RE) of aircraft crew due to cosmic rays (CR). On the other hand real-time CR data measured with the ground based neutron monitors (NMs) are collected worldwide and available online. This is an opportunity for comparison of long-term observations of RE at altitudes of about 10km, where composition and energy spectra of secondary particles differ from those on the ground, with the data from NMs. Our contribution presents examples of such type of comparison. Analysis of the silicon spectrometer Liulin measurements aboard aircraft is presented over the period May-September 2005 and compared with data from a single NM at middle latitude. While extreme solar driven events observed by NMs have clearly shown an impact on dosimetric characteristics as measured on the airplanes, the transient short time effects in CR of smaller amplitude have been not studied extensively in relation to RE. For the period May-September 2005, when aircraft data become available and several Forbush decreases (FDs) are observed on the ground, a small improvement in the correlation between the dose measured and multiple linear regression fit based on two key parameters (altitude and geomagnetic cut-off rigidity), is obtained, if the CR intensity at a single NM is added into the scheme.
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Affiliation(s)
- M Kákona
- Nuclear Physics Institute of the Czech Academy of Sciences, Department of Radiation Dosimetry, Prague, Czech Republic; Czech Technical University, Faculty of Nuclear Sciences and Physical Engineering, Prague, Czech Republic
| | - O Ploc
- Nuclear Physics Institute of the Czech Academy of Sciences, Department of Radiation Dosimetry, Prague, Czech Republic
| | - D Kyselová
- Nuclear Physics Institute of the Czech Academy of Sciences, Department of Radiation Dosimetry, Prague, Czech Republic; Czech Technical University, Faculty of Nuclear Sciences and Physical Engineering, Prague, Czech Republic
| | - J Kubančák
- Nuclear Physics Institute of the Czech Academy of Sciences, Department of Radiation Dosimetry, Prague, Czech Republic
| | - R Langer
- Institute of Experimental Physics, Košice, Slovakia
| | - K Kudela
- Institute of Experimental Physics, Košice, Slovakia.
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19
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Raddatz R, Reinhard J, Langer R, Fessler S, Kaufmann C, Nteli VA, Yuan J, Schiermeier S, Herrmann E, Eichbaum M, Louwen F. Mechanical versus pharmacological term induction: a cohort group analysis of maternal and neonatal outcome – hygroscopic cervical dilator versus intravaginal versus intracervical prostaglandin E2. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593192] [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] Open
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20
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Kunert B, Guo W, Mols Y, Langer R, Barla K. (Invited) Integration of III/V Hetero-Structures By Selective Area Growth on Si for Nano- and Optoelectronics. ACTA ACUST UNITED AC 2016. [DOI: 10.1149/07508.0409ecst] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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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21
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Wagner A, Kang Y, Van Dieren J, Mauer M, Grabsch H, Caballero C, Kataoka K, Atasoy A, Cho J, Mohler M, Roth A, Salto-Tellez M, Langer R, Schuhmacher C, Van Sandick J, Van Grieken N, Lordick F. 64. EORTC-1203: Integration of trastuzumab, with or without pertuzumab, into perioperative chemotherapy of HER-2 positive stomach cancer: INNOVATION EudraCT number 2014-000722-38; NCT02205047. Eur J Surg Oncol 2016. [DOI: 10.1016/j.ejso.2016.06.070] [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: 10/21/2022] Open
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22
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Rosenkranz K, Hierholzer J, Langer R, Hepp W, Palenker J, Felix R. Acetazolamide stimulation test in patients with unilateral internal carotid artery obstructions using transcranial Doppler and99mTC-HM-PAO-Spect. Neurol Res 2016; 14:135-8. [PMID: 1355870 DOI: 10.1080/01616412.1992.11740033] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Fifteen patients with symptoms of cerebral ischaemia and angiographically confirmed unilateral stenoses or occlusions of the extracranial internal carotid artery (ICA) and 20 controls were studied by a 2 MHz transcranial Doppler (TCD) at rest and after stimulation with 1 g acetazolamide i.v., a cerebral vasodilator. In addition, the patients underwent 99mTc-HM-PAO-Spect measurement of regional cerebral blood flow (rCBF) at rest and after stimulation with 1 g acetazolamide. In 10 patients with ICA stenoses greater than 80% or occlusions, time-mean velocity (Vmean) increase and pulsatility index (PI) decrease in the postobstructive middle cerebral artery (MCA) as well as the increase of the ipsilateral rCBF were reduced in comparison with the contralateral side. The remaining 5 patients showed a normal Vmean increase and PI decrease in TCD.
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Affiliation(s)
- K Rosenkranz
- Strahlenklinik und Poliklinik, Universitätsklinikum Rudolf Virchow, Freie Universität Berlin, Germany
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23
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Francica P, Lluís N, Aebersold D, Langer R, Bladt F, Blaukat A, Stroka D, Martínez MR, Zimmer Y, Medová M. Depletion of FOXM1 via MET targeting underlies establishment of a DNA damage-induced senescence program in gastric cancer. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61571-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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24
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Kimball AB, Javorsky E, Ron ES, Crowley W, Langer R. A novel approach to administration of peptides in women: Systemic absorption of a GnRH agonist via transvaginal ring delivery system. J Control Release 2016; 233:19-28. [PMID: 27130696 DOI: 10.1016/j.jconrel.2016.04.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 10/29/2015] [Revised: 04/11/2016] [Accepted: 04/24/2016] [Indexed: 10/21/2022]
Abstract
UNLABELLED trans-Epithelial delivery of medication across the vagina has proven successful for administration of small, lipophilic molecules such as sex steroids. However, little information is available regarding the vaginal delivery of larger and more polar molecules that currently require parenteral administration because the vaginal epithelium is perceived as a barrier to absorption of larger molecular weight (MW) molecules. Six healthy women underwent administration of 18 or 36mg of leuprolide, a GnRH agonist and a larger MW peptide, via a novel ethylene vinyl acetate (EVA) ring transvaginal drug delivery system (TVDS). Serum levels rose within 8h following insertion: low dose at 310pg/ml and high dose at 1220pg/ml, i.e. levels typically following parenteral injections of leuprolide. GnRHa biological activity was validated by secretion of gonadotropins and sex steroids. These results demonstrate that the non-keratinized vaginal epithelium permits a rapid absorption of a biologically active peptide and that there is significant potential for a novel TVDS to deliver peptides and possibly other macromolecules therapeutically. SIGNIFICANCE STATEMENT Current routes of administration of medications can include oral, subcutaneous, intravenous, intramuscular, transcutaneous, etc. Many of these approaches have limitations, including pain, poor tolerability, lack of adherence, and inadequate delivery. Peptides, in particular, cannot typically be given orally because they are broken down in the intestinal tract before they are absorbed. While the skin is an attractive way to deliver medications, its superb intrinsic barrier function often makes this route untenable at times. The vaginal epithelium, in contrast, is not keratinized and can allow absorption of other molecules. In this study, we demonstrate that a novel transvaginal drug delivery system (TVDS) is capable of delivering peptide therapeutics to women in a non-parenteral fashion as demonstrated by both blood levels and biologic effects of its delivery.
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Affiliation(s)
- A B Kimball
- Harvard Medical School, Massachusetts General Hospital, Boston, Mass, United States.
| | - E Javorsky
- Harvard Medical School, Massachusetts General Hospital, Boston, Mass, United States
| | - E S Ron
- Madash, LLC, Lexington Mass, United States
| | - W Crowley
- Harvard Medical School, Massachusetts General Hospital, Boston, Mass, United States
| | - R Langer
- Massachusetts Institute of Technology, Cambridge Mass, United States
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25
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Berezowska S, Schläfli A, Adams O, Galván J, Bubendorf L, Prince SS, Schmid R, Gugger M, Tschan M, Langer R. 25P Autophagy in early stage NSCLC – prognostic significance of the autophagy markers p62 and LC3B. J Thorac Oncol 2016. [DOI: 10.1016/s1556-0864(16)30139-3] [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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26
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Langer R, Gazali L, Neidl v. Gorkom K. Bildgebenden Befunde bei Patienten mit Stuewe-Wiedemann Syndrome (SWS) nach dem 2. Lebensjahr – ein Update. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581560] [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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27
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Traverso G, Ciccarelli G, Schwartz S, Hughes T, Boettcher T, Barman R, Langer R, Swiston A. Physiologic Status Monitoring via the Gastrointestinal Tract. PLoS One 2015; 10:e0141666. [PMID: 26580216 PMCID: PMC4651338 DOI: 10.1371/journal.pone.0141666] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 10/12/2015] [Indexed: 11/18/2022] Open
Abstract
Reliable, real-time heart and respiratory rates are key vital signs used in evaluating the physiological status in many clinical and non-clinical settings. Measuring these vital signs generally requires superficial attachment of physically or logistically obtrusive sensors to subjects that may result in skin irritation or adversely influence subject performance. Given the broad acceptance of ingestible electronics, we developed an approach that enables vital sign monitoring internally from the gastrointestinal tract. Here we report initial proof-of-concept large animal (porcine) experiments and a robust processing algorithm that demonstrates the feasibility of this approach. Implementing vital sign monitoring as a stand-alone technology or in conjunction with other ingestible devices has the capacity to significantly aid telemedicine, optimize performance monitoring of athletes, military service members, and first-responders, as well as provide a facile method for rapid clinical evaluation and triage.
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Affiliation(s)
- G. Traverso
- Division of Gastroenterology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States of America
- Department of Chemical Engineering and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States of America
| | - G. Ciccarelli
- Bioengineering Systems and Technologies, Massachusetts Institute of Technology Lincoln Laboratory, Lexington, MA, 02420, United States of America
| | - S. Schwartz
- Bioengineering Systems and Technologies, Massachusetts Institute of Technology Lincoln Laboratory, Lexington, MA, 02420, United States of America
| | - T. Hughes
- Bioengineering Systems and Technologies, Massachusetts Institute of Technology Lincoln Laboratory, Lexington, MA, 02420, United States of America
| | - T. Boettcher
- Bioengineering Systems and Technologies, Massachusetts Institute of Technology Lincoln Laboratory, Lexington, MA, 02420, United States of America
| | - R. Barman
- Division of Gastroenterology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States of America
- Department of Chemical Engineering and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States of America
| | - R. Langer
- Department of Chemical Engineering and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States of America
- * E-mail: (AS); (RL)
| | - A. Swiston
- Bioengineering Systems and Technologies, Massachusetts Institute of Technology Lincoln Laboratory, Lexington, MA, 02420, United States of America
- * E-mail: (AS); (RL)
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28
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Simoen E, Eneman G, Hikavyy AY, Loo R, Gupta S, Merckling C, Alian A, Schulze A, Caymax M, Langer R, Barla K, Claeys C. (Invited) On the Electrical Activity of Extended Defects in High-Mobility Channel Materials. ACTA ACUST UNITED AC 2015. [DOI: 10.1149/06910.0119ecst] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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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29
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Cunningham D, Langley R, Nankivell M, Blazeby J, Griffin M, Crellin A, Grabsch H, Okines A, Goldstein C, Falk S, Thompson J, Krysztopik R, Coxon F, Pritchard S, Langer R, Stenning S, Alderson D. LBA-03 Neoadjuvant chemotherapy for resectable oesophageal and junctional adenocarcinoma: results from the UK Medical Research Council randomised OEO5 trial (ISRCTN 01852072). Ann Oncol 2015. [DOI: 10.1093/annonc/mdv262.03] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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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30
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Schläfli AM, Berezowska S, Adams O, Langer R, Tschan MP. Reliable LC3 and p62 autophagy marker detection in formalin fixed paraffin embedded human tissue by immunohistochemistry. Eur J Histochem 2015; 59:2481. [PMID: 26150155 PMCID: PMC4503968 DOI: 10.4081/ejh.2015.2481] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [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: 01/07/2015] [Revised: 03/20/2015] [Accepted: 03/24/2015] [Indexed: 01/26/2023] Open
Abstract
Autophagy assures cellular homeostasis, and gains increasing importance in cancer, where it impacts on carcinogenesis, propagation of the malignant phenotype and development of resistance. To date, its tissue-based analysis by immunohistochemistry remains poorly standardized. Here we show the feasibility of specifically and reliably assessing the autophagy markers LC3B and p62 (SQSTM1) in formalin fixed and paraffin embedded human tissue by immunohistochemistry. Preceding functional experiments consisted of depleting LC3B and p62 in H1299 lung cancer cells with subsequent induction of autophagy. Western blot and immunofluorescence validated antibody specificity, knockdown efficiency and autophagy induction prior to fixation in formalin and embedding in paraffin. LC3B and p62 antibodies were validated on formalin fixed and paraffin embedded cell pellets of treated and control cells and finally applied on a tissue microarray with 80 human malignant and non-neoplastic lung and stomach formalin fixed and paraffin embedded tissue samples. Dot-like staining of various degrees was observed in cell pellets and 18/40 (LC3B) and 22/40 (p62) tumors, respectively. Seventeen tumors were double positive for LC3B and p62. P62 displayed additional significant cytoplasmic and nuclear staining of unknown significance. Interobserver-agreement for grading of staining intensities and patterns was substantial to excellent (kappa values 0.60 - 0.83). In summary, we present a specific and reliable IHC staining of LC3B and p62 on formalin fixed and paraffin embedded human tissue. Our presented protocol is designed to aid reliable investigation of dysregulated autophagy in solid tumors and may be used on large tissue collectives.
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Langer R, Neidl van Gorkom K, Mahmoud Mohamed N, Labada F. Gadolinium Ablagerung im Gewebe nach Langzeit-Intraperitonealer-Gadolinium-Injektion bei Ratten – Ergebnisse von in vitro Messungen. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551156] [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]
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Abstract
This study describes a series of ruthenium complexes with PNX-type ligands (X = heterocyclic donor group), and their catalytic activities in hydrogenation and dehydrogenation reactions are compared.
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Affiliation(s)
- W. Xu
- Lehn Institute of Functional Materials (LIFM)
- Sun Yat-Sen University (SYSU)
- Guangzhou 510275
- PR China
- Department of Chemistry
| | - R. Langer
- Lehn Institute of Functional Materials (LIFM)
- Sun Yat-Sen University (SYSU)
- Guangzhou 510275
- PR China
- Department of Chemistry
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33
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Jonas O, Sengupta S, Calligaris D, Poe M, Methuku K, Francois JP, Cook J, Agar N, Pomeroy S, Langer R. ET-24 * A NOVEL TROJAN HORSE FOR IN-VIVO SENSITIVITY TESTING OF MEDULLOBLASTOMA THERAPIES. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou255.24] [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: 11/13/2022] Open
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34
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Langer R, Bargon J, Eichbaum M. Die Genitaltuberkulose – ein seltenes Krankheitsbild; Kasuistik einer 34-jährigen Patientin. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388317] [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] Open
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35
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Kaemmerer D, Posorski N, von Eggeling F, Ernst G, Hörsch D, Baum RP, Prasad V, Langer R, Esposito I, Klöppel G, Sehner S, Knösel T, Hommann M. The search for the primary tumor in metastasized gastroenteropancreatic neuroendocrine neoplasm. Clin Exp Metastasis 2014; 31:817-27. [PMID: 25098566 DOI: 10.1007/s10585-014-9672-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/28/2014] [Indexed: 12/16/2022]
Abstract
Gastroenteropancreatic neuroendocrine tumors (NETs) often present as liver metastasis from a carcinoma of unknown primary. We recently showed that primary NETs from the pancreas, small intestine and stomach as well as their respective liver metastases differ from each other by the expression profile of the three genes CD302, PPWD1 and ABHB14B. The gene and protein expression of CD302, PPWD1, and ABHB14B was studied in abdominal NET metastases to identify the site of the respective primary tumors. Cryopreserved tissue from NET metastases collected in different institutions (group A: 29, group B: 50, group C: 132 specimens) were examined by comparative genomic hybridization (Agilent 105 K), gene expression analysis (Agilent 44 K) (groups A and B) and immunohistochemistry (group C). The data were blindly evaluated, i.e. without knowing the site of the primary. Gene expression analysis correctly revealed the primary in the ileum in 94 % of the cases of group A and in 58 % of group B. A pancreatic primary was predicted in 83 % (group A) and 20 % (group B), respectively. The combined sensitivity of group A and B was 75 % for ileal NETs and 38 % for pancreatic NETs. Immunohistochemical analysis of group C revealed an overall sensitivity of 80 %. Gene and protein expression analysis of CD302 and PPWD1 in NET metastases correctly identifies the primary in the pancreas or the ileum in 80 % of the cases, provided that the tissue is well preserved. Immunohistochemical profiling revealed CD302 as the best marker for ileal and PPWD1 for pancreatic detection.
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Affiliation(s)
- D Kaemmerer
- Department of General and Visceral Surgery, Zentralklinik Bad Berka, Robert-Koch-Allee 9, 99437, Bad Berka, Germany,
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36
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Toronyi E, Langer R, Deák Á, Hartmann E, Piros L, Homann M, Máthé Z, Szabó J, Chmel R, Doros A. Complications of Ureteric Anastomosis After Kidney Transplantation. Transplantation 2014. [DOI: 10.1097/00007890-201407151-02173] [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: 11/25/2022]
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37
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Godlewski M, Goldys EM, Philips MR, Bergman JP, Monemar B, Langer R, Barski A. Morphology and optical properties of cubic phase GaN epilayers grown on (001) Si. ACTA ACUST UNITED AC 2014. [DOI: 10.1557/s109257830000123x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Optical properties of GaN epilayers of a cubic phase are studied. We show a strong influence of the sample morphology on intensity of the edge emission. Whereas edge luminescence is reduced at the grain boundaries, red emission is spatially homogeneous.
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Langer R, Simon J, Konovalov O, Pelekanos N, Barski A, Leszczy˜ski M. X-ray reciprocal lattice mapping and photoluminescence of GaN/GaAlN Multiple Quantum Wells; strain induced phenomena. ACTA ACUST UNITED AC 2014. [DOI: 10.1557/s1092578300001186] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Structural properties of GaN/GaAlN multiple quantum wells (MQW) grown by nitrogen plasma assisted MBE on MOCVD-grown GaN/sapphire (GaN pseudosubstrates) have been characterised by X-ray reciprocal lattice mapping to determine the strain and composition of ternary alloys. The results clearly demonstrate that the barriers of GaAlN with up to 17% of aluminium content grown by plasma assisted MBE on GaN are fully strained. Optical properties have been characterised by low temperature photoluminescence. Photoluminescence emission peaks corresponding to the GaN/GaAlN MQW structures revealed strong red-shift with respect to the GaN energy gap. This can be explained by a strong internal electric field present in the QW's which is attributed to a transfer of piezoelectric field due to Fermi-level alignment.
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Holzscheiter M, Layland LE, Loffredo-Verde E, Mair K, Vogelmann R, Langer R, Wagner H, Prazeres da Costa C. Lack of host gut microbiota alters immune responses and intestinal granuloma formation during schistosomiasis. Clin Exp Immunol 2014; 175:246-57. [PMID: 24168057 DOI: 10.1111/cei.12230] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2013] [Indexed: 11/28/2022] Open
Abstract
Fatalities from schistosome infections arise due to granulomatous, immune-mediated responses to eggs that become trapped in host tissues. Schistosome-specific immune responses are characterized by initial T helper type 1 (Th1) responses and our previous studies demonstrated that myeloid differentiation primary response gene 88 (Myd88)-deficient mice failed to initiate such responses in vivo. Paradoxically, schistosomal antigens fail to stimulate innate cells to release proinflammatory cytokines in vitro. Since Schistosoma mansoni infection is an intestinal disease, we hypothesized that commensal bacteria could act as bystander activators of the intestinal innate immune system to instigate Th1 responses. Using a broad spectrum of orally administered antibiotics and anti-mycotics we analysed schistosome-infected mice that were simultaneously depleted of gut bacteria. After depletion there was significantly less inflammation in the intestine, which was accompanied by decreased intestinal granuloma development. In contrast, liver pathology remained unaltered. In addition, schistosome-specific immune responses were skewed and faecal egg excretion was diminished. This study demonstrates that host microbiota can act as a third partner in instigating helminth-specific immune responses.
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Affiliation(s)
- M Holzscheiter
- Institut für Medizinische Mikrobiologie, Immunologie und Hygiene (MIH), Technische Universität München, München, Germany
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Geppert CI, Rümmele P, Sarbia M, Langer R, Feith M, Morrison L, Pestova E, Schneider-Stock R, Hartmann A, Rau TT. Multi-colour FISH in oesophageal adenocarcinoma-predictors of prognosis independent of stage and grade. Br J Cancer 2014; 110:2985-95. [PMID: 24853183 PMCID: PMC4056055 DOI: 10.1038/bjc.2014.238] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 02/04/2014] [Revised: 04/08/2014] [Accepted: 04/10/2014] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Oesophageal adenocarcinoma or Barrett's adenocarcinoma (EAC) is increasing in incidence and stratification of prognosis might improve disease management. Multi-colour fluorescence in situ hybridisation (FISH) investigating ERBB2, MYC, CDKN2A and ZNF217 has recently shown promising results for the diagnosis of dysplasia and cancer using cytological samples. METHODS To identify markers of prognosis we targeted four selected gene loci using multi-colour FISH applied to a tissue microarray containing 130 EAC samples. Prognostic predictors (P1, P2, P3) based on genomic copy numbers of the four loci were statistically assessed to stratify patients according to overall survival in combination with clinical data. RESULTS The best stratification into favourable and unfavourable prognoses was shown by P1, percentage of cells with less than two ZNF217 signals; P2, percentage of cells with fewer ERBB2- than ZNF217 signals; and P3, overall ratio of ERBB2-/ZNF217 signals. Median survival times for P1 were 32 vs 73 months, 28 vs 73 months for P2; and 27 vs 65 months for P3. Regarding each tumour grade P2 subdivided patients into distinct prognostic groups independently within each grade, with different median survival times of at least 35 months. CONCLUSIONS Cell signal number of the ERBB2 and ZNF217 loci showed independence from tumour stage and differentiation grade. The prognostic value of multi-colour FISH-assays is applicable to EAC and is superior to single markers.
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Affiliation(s)
- C-I Geppert
- 1] Department of Pathology, Friedrich-Alexander Universität Erlangen-Nürnberg, Krankenhausstrasse 8/10, 91054 Erlangen, Germany [2] Comprehensive Cancer Center Erlangen-European Metropolitan Region Nuremberg 91054 Erlangen, Germany
| | - P Rümmele
- Department of Pathology, University Hospital Regensburg, 93053 Regensburg, Germany
| | - M Sarbia
- Department of Pathology and Cytology, 80992 Munich, Germany
| | - R Langer
- Department of Pathology, University Bern, CH 3010 Bern, Switzerland
| | - M Feith
- Department of Surgery, Klinikum Rechts der Isar, Technical University Munich, 81675 Munich, Germany
| | - L Morrison
- Ventana Medical Systems, Inc., Oro Valley, AZ 85755, USA
| | - E Pestova
- Abbott Molecular, Des Plaines, IL 60018, USA
| | - R Schneider-Stock
- 1] Department of Pathology, Friedrich-Alexander Universität Erlangen-Nürnberg, Krankenhausstrasse 8/10, 91054 Erlangen, Germany [2] Comprehensive Cancer Center Erlangen-European Metropolitan Region Nuremberg 91054 Erlangen, Germany
| | - A Hartmann
- 1] Department of Pathology, Friedrich-Alexander Universität Erlangen-Nürnberg, Krankenhausstrasse 8/10, 91054 Erlangen, Germany [2] Comprehensive Cancer Center Erlangen-European Metropolitan Region Nuremberg 91054 Erlangen, Germany
| | - T T Rau
- 1] Department of Pathology, Friedrich-Alexander Universität Erlangen-Nürnberg, Krankenhausstrasse 8/10, 91054 Erlangen, Germany [2] Comprehensive Cancer Center Erlangen-European Metropolitan Region Nuremberg 91054 Erlangen, Germany
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Celiz AD, Smith JGW, Patel AK, Langer R, Anderson DG, Barrett DA, Young LE, Davies MC, Denning C, Alexander MR. Chemically diverse polymer microarrays and high throughput surface characterisation: a method for discovery of materials for stem cell culture†Electronic supplementary information (ESI) available. See DOI: 10.1039/c4bm00054dClick here for additional data file. Biomater Sci 2014; 2:1604-1611. [PMID: 25328672 PMCID: PMC4183437 DOI: 10.1039/c4bm00054d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/22/2014] [Indexed: 01/03/2023]
Abstract
Chemically diverse polymer microarrays as a powerful screening tool for the discovery of new materials for a variety of applications.
Materials discovery provides the opportunity to identify novel materials that are tailored to complex biological environments by using combinatorial mixing of monomers to form large libraries of polymers as micro arrays. The materials discovery approach is predicated on the use of the largest chemical diversity possible, yet previous studies into human pluripotent stem cell (hPSC) response to polymer microarrays have been limited to 20 or so different monomer identities in each study. Here we show that it is possible to print and assess cell adhesion of 141 different monomers in a microarray format. This provides access to the largest chemical space to date, allowing us to meet the regenerative medicine challenge to provide scalable synthetic culture ware. This study identifies new materials suitable for hPSC expansion that could not have been predicted from previous knowledge of cell-material interactions.
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Affiliation(s)
- A D Celiz
- Laboratory of Biophysics and Surface Analysis , School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK .
| | - J G W Smith
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - A K Patel
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - R Langer
- Department of Chemical Engineering , Harvard-MIT Division of Health Sciences and Technology , David H. Koch Institute for Integrative Cancer Research , Massachusetts Institute of Technology , 500 Main Street , Cambridge , MA 02139 , USA
| | - D G Anderson
- Department of Chemical Engineering , Harvard-MIT Division of Health Sciences and Technology , David H. Koch Institute for Integrative Cancer Research , Massachusetts Institute of Technology , 500 Main Street , Cambridge , MA 02139 , USA
| | - D A Barrett
- School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK
| | - L E Young
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - M C Davies
- Laboratory of Biophysics and Surface Analysis , School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK .
| | - C Denning
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - M R Alexander
- Laboratory of Biophysics and Surface Analysis , School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK .
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Schmidt T, Sicic L, Blank S, Becker K, Weichert W, Bruckner T, Parakonthun T, Langer R, Büchler MW, Siewert JR, Lordick F, Ott K. Prognostic value of histopathological regression in 850 neoadjuvantly treated oesophagogastric adenocarcinomas. Br J Cancer 2014; 110:1712-20. [PMID: 24569472 PMCID: PMC3974097 DOI: 10.1038/bjc.2014.94] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [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: 10/13/2013] [Revised: 01/21/2014] [Accepted: 01/27/2014] [Indexed: 01/16/2023] Open
Abstract
Background: Recently, histopathological tumour regression, prevalence of signet ring cells, and localisation were reported as prognostic factors in neoadjuvantly treated oesophagogastric (junctional and gastric) cancer. This exploratory retrospective study analyses independent prognostic factors within a large patient cohort after preoperative chemotherapy including clinical and histopathological factors. Methods: In all, 850 patients presenting with oesophagogastric cancer staged cT3/4 Nany cM0/x were treated with neoadjuvant chemotherapy followed by resection in two academic centres. Patient data were documented in a prospective database and retrospectively analysed. Results: Of all factors prognostic on univariate analysis, only clinical response, complications, ypTNM stage, and R category were independently prognostic (P<0.01) on multivariate analysis. Tumour localisation and signet ring cells were independently prognostic only when investigator-dependent clinical response evaluation was excluded from the multivariate model. Histopathological tumour regression correlates with tumour grading, Laurén classification, clinical response, ypT, ypN, and R categories but was not identified as an independent prognostic factor. Within R0-resected patients only surgical complications and ypTNM stage were independent prognostic factors. Conclusions: Only established prognostic factors like ypTNM stage, R category, and complications were identified as independent prognostic factors in resected patients after neoadjuvant chemotherapy. In contrast, histopathological tumour regression was not found as an independent prognostic marker.
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Affiliation(s)
- T Schmidt
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - L Sicic
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - S Blank
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - K Becker
- Department of Pathology, Technische Universitaet Muenchen, 81675 Munich, Germany
| | - W Weichert
- Department of Pathology, University of Heidelberg, 69120 Heidelberg, Germany
| | - T Bruckner
- Institute of Medical Biometry and Informatics (IMBI), University of Heidelberg, 69120 Heidelberg, Germany
| | - T Parakonthun
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - R Langer
- Department of Pathology, University of Bern, 3010 Bern, Switzerland
| | - M W Büchler
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - J-R Siewert
- Directorate, University of Freiburg, 79095 Freiburg, Germany
| | - F Lordick
- University Cancer Center Leipzig (UCCL), University of Leipzig, 04103 Leipzig, Germany
| | - K Ott
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
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de Villiers TJ, Pines A, Panay N, Gambacciani M, Archer DF, Baber RJ, Davis SR, Gompel AA, Henderson VW, Langer R, Lobo RA, Plu-Bureau G, Sturdee DW. Updated 2013 International Menopause Society recommendations on menopausal hormone therapy and preventive strategies for midlife health. Climacteric 2014; 16:316-37. [PMID: 23672656 DOI: 10.3109/13697137.2013.795683] [Citation(s) in RCA: 216] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- T J de Villiers
- MediClinic Panorama and Department of Obstetrics and Gynecology, Stellenbosch University, Cape Town, South Africa
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Abstract
The use of polymeric matrices for the controlled release of polypeptides and other macromolecular drugs is reviewed. Three principal mechanisms of release include diffusion of the polypeptide through the polymer, erosion of the polymer matrix, and the application of magnetic fields to force more drug out of the matrix. The diffusion controlled systems generally utilize ethylene-vinyl acetate copolymer. The advantage of these systems is facile manipulation of the pore structure to obtain desired release kinetics. Release of many different polypeptides from these systems for periods of months has been demonstrated. Bioerosion provides the advantage that the polymer system does not need to be retrieved. Magnetism provides a mechanism whereby desired increases and decreases in polypeptide release rates can be achieved on demand.
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Affiliation(s)
- R A Siegel
- Whitaker College of Health Science, Technology, and Management, USA
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Reinhard J, Catania V, Rösler R, Raddatz R, Langer R, Eichbaum MHR, Yuan J, Louwen F. Prospektiv Randomisierte PGE2-Gel-Einleitungsstudie intravaginal (Minprostin (R)) gegen intrazervikal (Prepidil (R)) – Erste Ergebnisse. Z Geburtshilfe Neonatol 2013. [DOI: 10.1055/s-0033-1361419] [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: 10/26/2022]
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46
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Lang N, Pereira MN, Friehs I, Vasilyev NV, Feins EN, Fabozzo A, Lee Y, Langer R, Karp JM, Del Nido PJ. The use of a biocompatible photo-curable adhesive for intra- and extracardiac applications in acquired and congenital heart disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2153] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Blank S, Lordick F, Dobritz M, Grenacher L, Burian M, Langer R, Roth W, Schaible A, Becker K, Bläker H, Sisic L, Stange A, Compani P, Schulze-Bergkamen H, Jäger D, Büchler M, Siewert J, Ott K. A reliable risk score for stage IV esophagogastric cancer. Eur J Surg Oncol 2013; 39:823-30. [DOI: 10.1016/j.ejso.2013.01.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 10/13/2012] [Accepted: 01/09/2013] [Indexed: 12/19/2022] Open
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Breuer CK, Shin'oka T, Tanel RE, Zund G, Mooney DJ, Ma PX, Miura T, Colan S, Langer R, Mayer JE, Vacanti JP. Tissue engineering lamb heart valve leaflets. Biotechnol Bioeng 2012; 50:562-7. [PMID: 18627019 DOI: 10.1002/(sici)1097-0290(19960605)50:5<562::aid-bit11>3.0.co;2-l] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tissue engineered lamb heart valve leaflets (N - 3) were constructed by repeatedly seeding a concentrated suspension of autologous myofibroblasts onto a biodegradable synthetic polymeric scaffold composed of fibers made from polyglycolic acid and polylactic acid. Over a 2-week period the cells attached to the polymer fibers, multiplied, and formed a tissue core in the shape of the matrix. The tissue core was seeded with autologous large-vessel endothelial cells that formed a monolayer which coated the outer surface of the leaflet. The tissue engineered leaflets were surgically implanted in place of the right posterior pulmonary valve leaflet of the donor lamb while on cardiopulmonary bypass. Pulmonary valve function was evaluated by two-dimensional echocardiography with color Doppler which demonstrated valve function without evidence of stenosis and with only trivial regurgitation under normal physiologic conditions. Histologically, the tissue engineered heart valve leaflets resembled native valve leaflet tissue.
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Affiliation(s)
- C K Breuer
- Department of Surgery, Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
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Smith RS, Zhang Z, Bouchard M, Li J, Lapp HS, Brotske GR, Lucchino DL, Weaver D, Roth LA, Coury A, Biggerstaff J, Sukavaneshvar S, Langer R, Loose C. Vascular Catheters with a Nonleaching Poly-Sulfobetaine Surface Modification Reduce Thrombus Formation and Microbial Attachment. Sci Transl Med 2012; 4:153ra132. [DOI: 10.1126/scitranslmed.3004120] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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50
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Bauer L, Langer R, Mandl M, Becker K, Slotta-Huspenina J, Novotny A, Hapfelmeier A, Höfler H, Keller G. 837 Notch Signaling and Chemoresistance in Gastric Cancer. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71470-3] [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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