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Sutter C, Fabre M, Massi F, Blouin J, Mouchnino L. When mechanical engineering inspired from physiology improves postural-related somatosensory processes. Sci Rep 2023; 13:19495. [PMID: 37945691 PMCID: PMC10636053 DOI: 10.1038/s41598-023-45381-z] [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] [Received: 01/16/2023] [Accepted: 10/18/2023] [Indexed: 11/12/2023] Open
Abstract
Despite numerous studies uncovering the neural signature of tactile processing, tactile afferent inputs relating to the contact surface has not been studied so far. Foot tactile receptors being the first stimulated by the relative movement of the foot skin and the underneath moving support play an important role in the sensorimotor transformation giving rise to a postural reaction. A biomimetic surface, i.e., complying with the skin dermatoglyphs and tactile receptors characteristics should facilitate the cortical processes. Participants (n = 15) stood either on a biomimetic surface or on two control surfaces, when a sudden acceleration of the supporting surface was triggered (experiment 1). A larger intensity and shorter somatosensory response (i.e., SEP) was evoked by the biomimetic surface motion. This result and the associated decrease of theta activity (5-7 Hz) over the posterior parietal cortex suggest that increasing the amount of sensory input processing could make the balance task less challenging when standing on a biomimetic surface. This key point was confirmed by a second experiment (n = 21) where a cognitive task was added, hence decreasing the attentional resources devoted to the balance motor task. Greater efficiency of the postural reaction was observed while standing on the biomimetic than on the control surfaces.
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Affiliation(s)
- Chloé Sutter
- Laboratoire de Neurosciences Cognitives, FR 3C, Aix-Marseille Université, CNRS, 3 Place Victor Hugo, 13331, Marseille, France.
| | - Marie Fabre
- Laboratoire de Neurosciences Cognitives, FR 3C, Aix-Marseille Université, CNRS, 3 Place Victor Hugo, 13331, Marseille, France
| | - Francesco Massi
- Dipartimento di Ingegneria Meccanica ed Aerospaziale, Università degli Studi di Roma «La Sapienza», Rome, Italy
- Laboratoire de Mécanique des Contacts et des Structures, Institut National des Sciences Appliquées de Lyon (INSA LYON), Lyon, France
| | - Jean Blouin
- Laboratoire de Neurosciences Cognitives, FR 3C, Aix-Marseille Université, CNRS, 3 Place Victor Hugo, 13331, Marseille, France
| | - Laurence Mouchnino
- Laboratoire de Neurosciences Cognitives, FR 3C, Aix-Marseille Université, CNRS, 3 Place Victor Hugo, 13331, Marseille, France.
- Institut Universitaire de France, Paris, France.
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Sutter C, Moinon A, Felicetti L, Massi F, Blouin J, Mouchnino L. Cortical facilitation of tactile afferents during the preparation of a body weight transfer when standing on a biomimetic surface. Front Neurol 2023; 14:1175667. [PMID: 37404946 PMCID: PMC10315651 DOI: 10.3389/fneur.2023.1175667] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/30/2023] [Indexed: 07/06/2023] Open
Abstract
Self-generated movement shapes tactile perception, but few studies have investigated the brain mechanisms involved in the processing of the mechanical signals related to the static and transient skin deformations generated by forces and pressures exerted between the foot skin and the standing surface. We recently found that standing on a biomimetic surface (i.e., inspired by the characteristics of mechanoreceptors and skin dermatoglyphics), that magnified skin-surface interaction, increased the sensory flow to the somatosensory cortex and improved balance control compared to standing on control (e.g., smooth) surfaces. In this study, we tested whether the well-known sensory suppression that occurs during movements is alleviated when the tactile afferent signal becomes relevant with the use of a biomimetic surface. Eyes-closed participants (n = 25) self-stimulated their foot cutaneous receptors by shifting their body weight toward one of their legs while standing on either a biomimetic or a control (smooth) surface. In a control task, similar forces were exerted on the surfaces (i.e., similar skin-surface interaction) by passive translations of the surfaces. Sensory gating was assessed by measuring the amplitude of the somatosensory-evoked potential over the vertex (SEP, recorded by EEG). Significantly larger and shorter SEPs were found when participants stood on the biomimetic surface. This was observed whether the forces exerted on the surface were self-generated or passively generated. Contrary to our prediction, we found that the sensory attenuation related to the self-generated movement did not significantly differ between the biomimetic and control surfaces. However, we observed an increase in gamma activity (30-50 Hz) over centroparietal regions during the preparation phase of the weight shift only when participants stood on the biomimetic surface. This result might suggest that gamma-band oscillations play an important functional role in processing behaviorally relevant stimuli during the early stages of body weight transfer.
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Affiliation(s)
- Chloé Sutter
- Laboratoire de Neurosciences Cognitives, FR 3C, CNRS, Aix Marseille Université, Marseille, France
| | - Alix Moinon
- Laboratoire de Neurosciences Cognitives, FR 3C, CNRS, Aix Marseille Université, Marseille, France
| | - Livia Felicetti
- Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, Rome, Italy
- LAMCOS, INSA Lyon, CNRS, UMR5259, Université Lyon, Villeurbanne, France
| | - Francesco Massi
- Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, Rome, Italy
| | - Jean Blouin
- Laboratoire de Neurosciences Cognitives, FR 3C, CNRS, Aix Marseille Université, Marseille, France
| | - Laurence Mouchnino
- Laboratoire de Neurosciences Cognitives, FR 3C, CNRS, Aix Marseille Université, Marseille, France
- Institut Universitaire de France, Paris, France
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Fabre M, Beullier L, Sutter C, Kebritchi A, Chavet P, Simoneau M, Toupet M, Blouin J, Mouchnino L. Cortical facilitation of somatosensory inputs using gravity-related tactile information in humans with vestibular hypofunction. J Neurophysiol 2023. [PMID: 37314089 DOI: 10.1152/jn.00406.2022] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023] Open
Abstract
A few years after their bilateral vestibular loss, patients usually show a motor repertoire that is almost back to normal. This recovery is thought to involve an up-regulation of the visual and proprioceptive information that compensates for the lack of vestibular information. Here, we investigated whether plantar tactile inputs, which provide body information relative to the ground and to the Earth-vertical, contribute to this compensation. More specifically, we tested the hypothesis that somatosensory cortex response to electric stimulation of the plantar sole in standing adults will be greater in humans (n = 10) with bilateral vestibular hypofunction (VH) than in an age-matched healthy group (n = 10). Showing significantly greater somatosensory evoked potentials (i.e., P1N1) in VH than in controls, the electroencephalographic recordings supported this hypothesis. Furthermore, we found evidence that increasing the differential pressure between both feet, by adding a 1 kg mass at each pendant wrist, enhanced the internal representation of body orientation and motion relative to a gravitational reference frame. The large decrease in alpha power in the right posterior parietal cortex (and not in the left) is in line with this assumption. Finally, behavioral analyses showed that trunk oscillations were smaller than head oscillations in VH and showed a reverse pattern for healthy participants. These findings are consistent with a tactile-based postural control strategy in the absence of vestibular input, and a vestibular-based control strategy in healthy participants where the head serves as a reference for balance control.
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Affiliation(s)
- Marie Fabre
- Aix Marseille Univ. CNRS, Laboratoire de Neurosciences Cognitives, Marseille, France
| | - Laura Beullier
- Aix Marseille Univ. CNRS, Laboratoire de Neurosciences Cognitives, Marseille, France
| | - Chloé Sutter
- Aix Marseille Univ. CNRS, Laboratoire de Neurosciences Cognitives, Marseille, France
| | - Amirreza Kebritchi
- Centre Interdisciplinaire de Recherche en Réadaptation et Intégration Sociale (CIRRIS) du CIUSSS de la Capitale Nationale, Québec, Canada
| | - Pascale Chavet
- Aix Marseille Univ, CNRS, Institut des Sciences du Mouvement, Marseille, France
| | - Martin Simoneau
- Centre Interdisciplinaire de Recherche en Réadaptation et Intégration Sociale (CIRRIS) du CIUSSS de la Capitale Nationale, Québec, Canada
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec, Canada
| | - Michel Toupet
- IRON, Institut de Recherche en Oto-Neurologie, Paris, France
- Centre d'Explorations Fonctionnelles Oto-Neurologiques, Paris, France
| | - Jean Blouin
- Aix Marseille Univ. CNRS, Laboratoire de Neurosciences Cognitives, Marseille, France
| | - Laurence Mouchnino
- Aix Marseille Univ. CNRS, Laboratoire de Neurosciences Cognitives, Marseille, France
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Fabre M, Sainton P, Sutter C, Mouchnino L, Chavet P. Partial Unweighting in Obese Persons Enhances Tactile Transmission From the Periphery to Cortical Areas: Impact on Postural Adjustments. Front Hum Neurosci 2022; 16:782028. [PMID: 35774481 PMCID: PMC9238273 DOI: 10.3389/fnhum.2022.782028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
Tactile plantar information is known to play an important role in balance maintenance and to contribute to the setting of anticipatory postural adjustments (APAs) prior to stepping. Previous studies have suggested that somatosensory processes do not function optimally for obese individuals due to the increased pressure of the plantar sole resulting in balance issues. Here, we investigated whether decreasing the compression of the mechanoreceptors by unweighting the plantar sole would enhance tactile sensory processes leading to an increased stability and an accurate setting of the APAs in obese individuals. More specifically, we tested the hypothesis that the somatosensory cortex response to electric stimulation (SEP) of the plantar sole in standing obese persons will be greater with reduced body weight than with their effective weight. The level of unweighting was calculated for each participant to correspond to a healthy body mass index. We showed an increase SEP amplitude in the unweighted condition compared to the effective body weight for all participants. This increase can be explained by the reduction of weight itself but also by the modified distribution of the pressure exerted onto the foot sole. Indeed, in the unweighted condition, the vertical ground reaction forces are evenly distributed over the surface of the foot. This suggests that decreasing and equalizing the pressure applied on the plantar mechanoreceptors results in an increase in somatosensory transmission and sensory processes for obese persons when unweighted. These sensory processes are crucial prior to step initiation and for setting the anticipatory postural adjustments (i.e., thrust). These cortical changes could have contributed to the observed changes in the spatiotemporal characteristics of the thrust prior to step initiation.
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Affiliation(s)
- Marie Fabre
- Aix-Marseille Université, CNRS, Laboratoire de Neurosciences Cognitives, FR 3C, Marseille, France
| | - Patrick Sainton
- Aix-Marseille Université, CNRS, Institut des Sciences du Mouvement, Marseille, France
| | - Chloé Sutter
- Aix-Marseille Université, CNRS, Laboratoire de Neurosciences Cognitives, FR 3C, Marseille, France
| | - Laurence Mouchnino
- Aix-Marseille Université, CNRS, Laboratoire de Neurosciences Cognitives, FR 3C, Marseille, France
- Institut Universitaire de France, Paris, France
| | - Pascale Chavet
- Aix-Marseille Université, CNRS, Institut des Sciences du Mouvement, Marseille, France
- *Correspondence: Pascale Chavet
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Rempel E, Kluck K, Beck S, Ourailidis I, Kazdal D, Neumann O, Volckmar AL, Kirchner M, Goldschmid H, Pfarr N, Weichert W, Hübschmann D, Fröhling S, Sutter C, Schaaf CP, Schirmacher P, Endris V, Stenzinger A, Budczies J. Pan-cancer analysis of genomic scar patterns caused by homologous repair deficiency (HRD). NPJ Precis Oncol 2022; 6:36. [PMID: 35681079 PMCID: PMC9184602 DOI: 10.1038/s41698-022-00276-6] [Citation(s) in RCA: 17] [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: 07/01/2021] [Accepted: 04/15/2022] [Indexed: 12/12/2022] Open
Abstract
Homologous repair deficiency (HRD) is present in many cancer types at variable prevalence and can indicate response to platinum-based chemotherapy and PARP inhibition. We developed a tumor classification system based on the loss of function of genes in the homologous recombination repair (HRR) pathway. To this end, somatic and germline alterations in BRCA1/2 and 140 other HRR genes were included and assessed for the impact on gene function. Additionally, information on the allelic hit type and on BRCA1 promoter hypermethylation was included. The HRDsum score including LOH, LST, and TAI was calculated for 8847 tumors of the TCGA cohort starting from genotyping data and for the subcohort of ovarian cancer also starting from WES data. Pan-cancer, deleterious BRCA1/2 alterations were detected in 4% of the tumors, while 18% of the tumors were HRD-positive (HRDsum ≥ 42). Across 33 cancer types, both BRCA1/2 alterations and HRD-positivity were most prevalent in ovarian cancer (20% and 69%). Pan-cancer, tumors with biallelic deleterious alterations in BRCA1/2 were separated strongly from tumors without relevant alterations (AUC = 0.89), while separation for tumors with monoallelic deleterious BRCA1/2 alterations was weak (AUC = 0.53). Tumors with biallelic deleterious alterations in other HHR genes were separated moderately from tumors without relevant alterations (AUC = 0.63), while separation for tumors with such monoallelic alterations was weaker (AUC = 0.57). In ovarian cancer, HRDsum scores calculated from WES data correlated strongly with HRDsum scores calculated from genotyping data (R = 0.87) and were slightly (4%) higher. We comprehensively analyzed HRD scores and their association with mutations in HRR genes in common cancer types. Our study identifies important parameters influencing HRD measurement and argues for an integration of HRDsum score with specific mutational profiles.
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Affiliation(s)
- E Rempel
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - K Kluck
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - S Beck
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany.,Center for Personalized Medicine (ZPM) Heidelberg, 69120, Heidelberg, Germany
| | - I Ourailidis
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - D Kazdal
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany.,German Center for Lung Research (DZL), Heidelberg site, 69120, Heidelberg, Germany
| | - O Neumann
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - A L Volckmar
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - M Kirchner
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - H Goldschmid
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - N Pfarr
- Institute of Pathology, TUM School of Medicine, Technical University of Munich, 81675, Munich, Germany
| | - W Weichert
- Institute of Pathology, TUM School of Medicine, Technical University of Munich, 81675, Munich, Germany.,German Cancer Consortium (DKTK), 69120, Heidelberg, Germany
| | - D Hübschmann
- German Cancer Consortium (DKTK), 69120, Heidelberg, Germany.,Division of Translational Medical Oncology, NCT Heidelberg and DKFZ, 69120, Heidelberg, Germany.,NCT Molecular Diagnostics Program, NCT Heidelberg and DKFZ, 69120, Heidelberg, Germany
| | - S Fröhling
- Center for Personalized Medicine (ZPM) Heidelberg, 69120, Heidelberg, Germany.,German Cancer Consortium (DKTK), 69120, Heidelberg, Germany.,Division of Translational Medical Oncology, NCT Heidelberg and DKFZ, 69120, Heidelberg, Germany.,NCT Molecular Diagnostics Program, NCT Heidelberg and DKFZ, 69120, Heidelberg, Germany
| | - C Sutter
- Institute of Human Genetics, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - C P Schaaf
- Center for Personalized Medicine (ZPM) Heidelberg, 69120, Heidelberg, Germany.,Institute of Human Genetics, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - P Schirmacher
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany.,German Cancer Consortium (DKTK), 69120, Heidelberg, Germany
| | - V Endris
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - A Stenzinger
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany. .,Center for Personalized Medicine (ZPM) Heidelberg, 69120, Heidelberg, Germany. .,German Center for Lung Research (DZL), Heidelberg site, 69120, Heidelberg, Germany. .,German Cancer Consortium (DKTK), 69120, Heidelberg, Germany.
| | - J Budczies
- Institute of Pathology, Heidelberg University Hospital, 69120, Heidelberg, Germany. .,Center for Personalized Medicine (ZPM) Heidelberg, 69120, Heidelberg, Germany. .,German Center for Lung Research (DZL), Heidelberg site, 69120, Heidelberg, Germany. .,German Cancer Consortium (DKTK), 69120, Heidelberg, Germany.
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Uberoi A, Bartow-McKenney C, Zheng Q, Flowers L, Campbell A, Knight S, Chan N, Wei M, Lovins V, Bugayev J, Horwinski J, Bradley C, Meyer J, Crumrine D, Sutter C, Elias P, Mauldin E, Sutter T, Grice E. 190 Commensal microbiota regulates skin barrier function and repair via signaling through the aryl hydrocarbon receptor. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.211] [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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Hashmi A, Al-Natour M, Azar N, Sutter C, Davidson J, Tavri S. Abstract No. 589 Assessing the role of interventional radiology during the initial phase of COVID-19: a large health system experience. J Vasc Interv Radiol 2021. [PMCID: PMC8079606 DOI: 10.1016/j.jvir.2021.03.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Walker L, Azeze S, Alencherry E, Jones R, Kardan A, Al-Natour M, Sutter C, McLoney E, Tavri S. Abstract No. 558 Quantitative comparison of liver tumor perfusion of Yttrium 90 (Y-90) using balloon occlusion versus end-hole microcatheter. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.619] [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: 11/28/2022] Open
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Rahnemai-Azar A, Enzerra M, Smith Z, Glessing B, Ammori J, Sutter C, Tavri S. Abstract No. 386 Evaluation and management of arterial pseudoaneurysms in the setting of pancreatitis. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.447] [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: 11/28/2022] Open
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Sutter C, Olesen K, Bhuju J, Guo Z, Sutter T. 290 Glycolytic control of keratinocyte differentiation. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.366] [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: 11/27/2022]
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Rippinger N, Haun MW, Fischer C, Rhiem K, Hübbel A, Grill S, Kiechle M, Cremer FW, Kast K, Nguyen HP, Ditsch N, Kratz P, Pfister S, Pajtler KW, Speiser D, Seitz S, Glimm H, Maatouk I, Hahne A, Sutter C, Schmutzler RK, Dikow N, Sohn C, Schott S. Prophylactic surgery among germline TP53 mutation carriers in Germany – a multicentric observational study. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671357] [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] Open
Affiliation(s)
- N Rippinger
- University Hospital Heidelberg, Department of Gynaecology and Obstetrics, Heidelberg, Deutschland
| | - MW Haun
- University Hospital Heidelberg, Department of General Internal Medicine and Psychosomatics, Heidelberg, Deutschland
| | - C Fischer
- University Hospital Heidelberg, Institute of Human Genetics, Heidelberg, Deutschland
| | - K Rhiem
- University Hospital of Cologne, Department of Gynaecology and Obstetrics, Cologne, Deutschland
| | - A Hübbel
- University Hospital of Cologne, Department of Gynaecology and Obstetrics, Cologne, Deutschland
| | - S Grill
- Klinikum rechts der Isar; Technical University of Munich, Department of Gynaecology and Centre for Hereditary Breast and Ovarian Cancer, Munich, Deutschland
| | - M Kiechle
- Klinikum rechts der Isar; Technical University of Munich, Department of Gynaecology and Centre for Hereditary Breast and Ovarian Cancer, Munich, Deutschland
| | - FW Cremer
- SYNLAB Centre for Human Genetics, Mannheim, Deutschland
| | - K Kast
- Medical Faculty and University Hospital Carl Gustav Carus, Technical University Dresden, Department of Gynaecology and Obstetrics, Dresden, Deutschland
- National Center for Tumor Diseases, Partner Site Dresden, Dresden, Deutschland
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Dresden, Deutschland
| | - HP Nguyen
- University Hospital of Tuebingen, Institute of Medical Genetics and Applied Genomics, Tuebingen, Deutschland
- University of Bochum, Department of Human Genetics, Bochum, Deutschland
| | - N Ditsch
- Ludwig-Maximilians University, University Hospital of Munich, Department of Gynaecology and Obstetrics, Munich, Deutschland
| | - P Kratz
- Hannover Medical School, Paediatric Haematology and Oncology, Hannover, Deutschland
| | - S Pfister
- Hopp Children's Cancer Centre at the NCT Heidelberg (KiTZ), Heidelberg, Deutschland
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Division of Paediatric Neurooncology, Heidelberg, Deutschland
- University Hospital Heidelberg, Department of Paediatric Oncology, Hematology and Immunology, Heidelberg, Deutschland
| | - KW Pajtler
- Hopp Children's Cancer Centre at the NCT Heidelberg (KiTZ), Heidelberg, Deutschland
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Division of Paediatric Neurooncology, Heidelberg, Deutschland
- University Hospital Heidelberg, Department of Paediatric Oncology, Hematology and Immunology, Heidelberg, Deutschland
| | - D Speiser
- University Hospital Charité Berlin, Department of Gynaecology and Obstetrics, Berlin, Deutschland
| | - S Seitz
- University Medical Centre Regensburg, Department of Gynaecology and Obstetrics, Regensburg, Deutschland
| | - H Glimm
- National Center for Tumor Diseases (NCT), Heidelberg, Deutschland
| | - I Maatouk
- University Hospital Heidelberg, Department of General Internal Medicine and Psychosomatics, Heidelberg, Deutschland
| | - A Hahne
- BRCA Network, Hannover, Deutschland
| | - C Sutter
- University Hospital Heidelberg, Department of Human Genetics, Heidelberg, Deutschland
| | - RK Schmutzler
- University Hospital of Cologne, Department of Gynaecology and Obstetrics, Cologne, Deutschland
| | - N Dikow
- University Hospital Heidelberg, Department of Human Genetics, Heidelberg, Deutschland
| | - C Sohn
- University Hospital Heidelberg, Department of Gynaecology and Obstetrics, Heidelberg, Deutschland
| | - S Schott
- University Hospital Heidelberg, Department of Gynaecology and Obstetrics, Heidelberg, Deutschland
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Hoeffe J, Doyon Trottier E, Bailey B, Shellshear D, Lagacé M, Sutter C, Grimard G, Cook R, Babl FE. Intranasal fentanyl and inhaled nitrous oxide for fracture reduction: The FAN observational study. Am J Emerg Med 2017; 35:710-715. [PMID: 28190665 DOI: 10.1016/j.ajem.2017.01.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 01/03/2017] [Accepted: 01/03/2017] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION Procedural sedation and analgesia (PSA) are frequently used for fracture reduction in pediatric emergency departments (ED). Combining intranasal (IN) fentanyl with inhalation of nitrous oxide (N2O) allow for short recovery time and obviates painful and time-consuming IV access insertions. METHODS We performed a bicentric, prospective, observational cohort study. Patients aged 4-18years were included if they received combined PSA with IN fentanyl and N2O for the reduction of mildly/moderately displaced fracture or of dislocation. Facial Pain Scale Revised (FPS-R) and Face, Leg, Activity, Cry, Consolability (FLACC) scores were used to evaluate pain and anxiety before, during and after procedure. University of Michigan Sedation Score (UMSS), adverse events, detailed side effects and satisfaction of patients, parents and medical staff were recorded at discharge. A follow up telephone call was made after 24-72h. RESULTS 90 patients were included. There was no difference in FPS-R during the procedure (median score 2 versus 2), but the FLACC score was significantly higher as compared to before (median score 4 versus 0, Δ 2, 95% CI 0, 2). Median UMSS was 1 (95% CI 1, 2). We recorded no serious adverse events. Rate of vomiting was 12% (11/84). Satisfaction was high among participants responding to this question 85/88 (97%) of parents, 74/83 (89%) of patients and 82/85 (96%) of physicians would want the same sedation again. CONCLUSION PSA with IN fentanyl and N2O is effective and safe for the reduction of mildly/moderately displaced fracture or dislocation, and has a high satisfaction rate.
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Affiliation(s)
- J Hoeffe
- Division of Emergency Medicine, Department of Pediatrics, CHU Sainte-Justine, Université de Montréal, Montréal, Canada.
| | - E Doyon Trottier
- Division of Emergency Medicine, Department of Pediatrics, CHU Sainte-Justine, Université de Montréal, Montréal, Canada
| | - B Bailey
- Division of Emergency Medicine, Department of Pediatrics, CHU Sainte-Justine, Université de Montréal, Montréal, Canada
| | - D Shellshear
- Emergency Department, Royal Children's Hospital, University of Melbourne, Australia
| | - M Lagacé
- Division of Emergency Medicine, Department of Pediatrics, CHU Sainte-Justine, Université de Montréal, Montréal, Canada
| | - C Sutter
- Emergency Department, Royal Children's Hospital, University of Melbourne, Australia
| | - G Grimard
- Division of Orthopedics, Department of Surgery, CHU Sainte-Justine, Université de Montréal, Montréal, Canada
| | - R Cook
- Division of Emergency Medicine, Department of Pediatrics, CHU Sainte-Justine, Université de Montréal, Montréal, Canada
| | - F E Babl
- Emergency Department, Royal Children's Hospital, University of Melbourne, Australia; Murdoch Children's Research Institute, Australia; University of Melbourne, Australia
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Rhiem K, Engel C, Hahnen E, Engel J, Niederacher D, Sutter C, Varon-Mateeva R, Steinemann D, Arnold N, Dworniczak B, Wang-Gohrke S, Gehrig A, Meindl A, Schmutzler R. BRCA1/2-Mutationsprävalenz bei Patientinnen mit Triple-negativem Mammakarzinom und ohne familiäre Belastung für Brust- und Eierstockkrebs. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593270] [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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Hoeffe J, Trottier ED, Bailey B, Shellshear D, Lagacé M, Sutter C, Grimard G, Cook R, Babl FE. The Fan Study: Intranasal Fentanyl and Inhaled Nitrous Oxide for Fracture Reduction. Paediatr Child Health 2016. [DOI: 10.1093/pch/21.supp5.e69e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
BACKGROUND: Recently, intranasal (IN) fentanyl and inhaled nitrous oxide/oxygen (N2O) mixture have been increasingly used for procedural sedation and analgesia (PSA) alone or in combination. There is a lack of data on the efficacy of these combined agents.
OBJECTIVES: To evaluate the efficacy of IN fentanyl and N2O as PSA for the reduction of mildly-to-moderately displaced fractures and dislocations.
DESIGN/METHODS: We performed a prospective, observational cohort study between September 2014 and October 2015. Patients were recruited at CHU Sainte Justine (Montréal, Canada) and Royal Children Hospital (Melbourne, Australia). Patients between the age of 4 and 18 years were eligible if PSA consisted of IN fentanyl and N2O for the reduction of mildly-to-moderately displaced fractures or dislocations. Patients received at least IN fentanyl 1.5 mcg/kg (100 mcg max) and at least a 50/50% mixture of N2O with oxygen. Primary outcome was the efficacy of PSA measured by the patient assigned Facial Pain Scale-Revised (FPS-R). The Face, Legs, Activity, Cry, Consolability (FLACC) scale was also recorded. Depth of sedation was evalu-ated using the University of Michigan Sedation Scale (UMSS). Adverse events were recorded following the criteria of the Consensus Panel on Sedation Research of PERC/PECARN. Additional data concerning satisfaction or discomfort were evaluated via questionnaires, and follow-up telephone calls were made to elicit information on adverse events after discharge.
RESULTS: A total of 91 patients aged 9.7±3.0 years were enrolled. There was no difference between the median FPS-R score during the procedure compared to before: Median 2 and 2 (median difference 0 [95% CI 0, 0]), respectively. The FLACC score was higher during the procedure than before: Median 4 and 0 (median difference 2 [95% CI 1, 3]). UMSS was 1 (95% CI 1, 2) during the procedure. 42 (46%) patients had adverse events, all mild: vertigo (20%), nausea (16%)]or vomiting (12%). A total of 85/88 (97%) parents and 82/85 (96%) ED physicians would want the same sedation in another procedure.
CONCLUSION: PSA with IN fentanyl and N2O seems effective in our cohort study, as evaluated by patient assigned FPS-R. Patients were minimally sedated. Adverse events were frequent but mild. Overall, parents and medical staff would want the same agents used in another procedure. Thus, PSA with IN fentanyl and N2O appears to be an attractive option for reduction of mildly displaced fractures or dislocations.
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Oehl M, Sutter C. Age-related differences in processing visual device and task characteristics when using technical devices. Appl Ergon 2015; 48:214-223. [PMID: 25683548 DOI: 10.1016/j.apergo.2014.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 02/11/2014] [Revised: 12/01/2014] [Accepted: 12/06/2014] [Indexed: 06/04/2023]
Abstract
With aging visual feedback becomes increasingly relevant in action control. Consequently, visual device and task characteristics should more and more affect tool use. Focussing on late working age, the present study aims to investigate age-related differences in processing task irrelevant (display size) and task relevant visual information (task difficulty). Young and middle-aged participants (20-35 and 36-64 years of age, respectively) sat in front of a touch screen with differently sized active touch areas (4″ to 12″) and performed pointing tasks with differing task difficulties (1.8-5 bits). Both display size and age affected pointing performance, but the two variables did not interact and aiming duration moderated both effects. Furthermore, task difficulty affected the pointing durations of middle-aged adults moreso than those of young adults. Again, aiming duration accounted for the variance in the data. The onset of an age-related decline in aiming duration can be clearly located in middle adulthood. Thus, the fine psychomotor ability "aiming" is a moderator and predictor for age-related differences in pointing tasks. The results support a user-specific design for small technical devices with touch interfaces.
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Affiliation(s)
- M Oehl
- Leuphana University of Lüneburg, Institute of Experimental Industrial Psychology, Wilschenbrucher Weg 84a, 21335 Lüneburg, Germany.
| | - C Sutter
- RWTH Aachen University, Department of Psychology, Jägerstraße 17-19, 52056 Aachen, Germany.
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Scherr RE, Linnell J, Smith M, Nicholson Y, Spezzano T, Bergman J, Brian K, Briggs M, Feenstra G, Hillhouse C, Keen CL, Nguyen L, Ontai L, Schaefer S, Steinberg F, Sutter C, Wright J, Young H, Zidenberg‐Cherr S. The Shaping Healthy Choices Program: A Multi‐Component, School‐Based Approach to Improve Children's Nutrition and Health Behaviors While Supporting Regional Agriculture. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.623.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rachel E Scherr
- NutritionUniversity of CaliforniaDavisCA
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
| | - J Linnell
- NutritionUniversity of CaliforniaDavisCA
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
| | - M Smith
- Center for Nutrition in SchoolsUniversity of CaliforniaDavisCA
- Population Health and ReproductionUniversity of CaliforniaDavisCA
| | | | | | - J Bergman
- NutritionUniversity of CaliforniaDavisCA
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
| | - K Brian
- UCCE Sacramento CountyUC ANRSacramentoCA
| | - M Briggs
- NutritionUniversity of CaliforniaDavisCA
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
| | - G Feenstra
- Agricultural Sustainability InstituteUniversity of CaliforniaDavisCA
| | - C Hillhouse
- Agricultural Sustainability InstituteUniversity of CaliforniaDavisCA
| | - C L Keen
- NutritionUniversity of CaliforniaDavisCA
| | - L Nguyen
- NutritionUniversity of CaliforniaDavisCA
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
| | - L Ontai
- Human EcologyUniversity of CaliforniaDavisCA
| | - S Schaefer
- Foods For Health InstituteUniversity of CaliforniaDavisCA
| | | | - C Sutter
- Human EcologyUniversity of CaliforniaDavisCA
| | - J Wright
- Plant SciencesUniversity of CaliforniaDavisCA
| | - H Young
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
| | - S Zidenberg‐Cherr
- NutritionUniversity of CaliforniaDavisCA
- Betty Irene Moore School of NursingUniversity of California DavisSacramentoCA
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Scherr RE, Linnell J, Nicholson Y, Spezzano T, Bergman J, Brian K, Briggs M, Cherr SE, Ermakov I, Feenstra G, Gellermann W, Hillhouse C, Nguyen L, Ontai L, Schaefer S, Smith M, Sutter C, Wright J, Zidenberg‐Cherr S. Assessment of Nutrition and Physical Activity in Children Participating in the Shaping Healthy Choices Program. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.624.3] [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: 11/11/2022]
Affiliation(s)
| | | | | | | | | | - K Brian
- UCCE Sacramento CountyUC ANRSacCA
| | | | | | | | | | | | | | | | - L Ontai
- Human EcologyUC DavisDavisCA
| | | | - M Smith
- Human EcologyUC DavisDavisCA
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Jakubowska A, Rozkrut D, Antoniou A, Hamann U, Scott RJ, McGuffog L, Healy S, Sinilnikova OM, Rennert G, Lejbkowicz F, Flugelman A, Andrulis IL, Glendon G, Ozcelik H, Thomassen M, Paligo M, Aretini P, Kantala J, Aroer B, von Wachenfeldt A, Liljegren A, Loman N, Herbst K, Kristoffersson U, Rosenquist R, Karlsson P, Stenmark-Askmalm M, Melin B, Nathanson KL, Domchek SM, Byrski T, Huzarski T, Gronwald J, Menkiszak J, Cybulski C, Serrano P, Osorio A, Cajal TR, Tsitlaidou M, Benítez J, Gilbert M, Rookus M, Aalfs CM, Kluijt I, Boessenkool-Pape JL, Meijers-Heijboer HEJ, Oosterwijk JC, van Asperen CJ, Blok MJ, Nelen MR, van den Ouweland AMW, Seynaeve C, van der Luijt RB, Devilee P, Easton DF, Peock S, Frost D, Platte R, Ellis SD, Fineberg E, Evans DG, Lalloo F, Eeles R, Jacobs C, Adlard J, Davidson R, Eccles D, Cole T, Cook J, Godwin A, Bove B, Stoppa-Lyonnet D, Caux-Moncoutier V, Belotti M, Tirapo C, Mazoyer S, Barjhoux L, Boutry-Kryza N, Pujol P, Coupier I, Peyrat JP, Vennin P, Muller D, Fricker JP, Venat-Bouvet L, Johannsson OT, Isaacs C, Schmutzler R, Wappenschmidt B, Meindl A, Arnold N, Varon-Mateeva R, Niederacher D, Sutter C, Deissler H, Preisler-Adams S, Simard J, Soucy P, Durocher F, Chenevix-Trench G, Beesley J, Chen X, Rebbeck T, Couch F, Wang X, Lindor N, Fredericksen Z, Pankratz VS, Peterlongo P, Bonanni B, Fortuzzi S, Peissel B, Szabo C, Mai PL, Loud JT, Lubinski J. Association of PHB 1630 C>T and MTHFR 677 C>T polymorphisms with breast and ovarian cancer risk in BRCA1/2 mutation carriers: results from a multicenter study. Br J Cancer 2012; 106:2016-24. [PMID: 22669161 PMCID: PMC3388557 DOI: 10.1038/bjc.2012.160] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 03/18/2012] [Accepted: 03/25/2012] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The variable penetrance of breast cancer in BRCA1/2 mutation carriers suggests that other genetic or environmental factors modify breast cancer risk. Two genes of special interest are prohibitin (PHB) and methylene-tetrahydrofolate reductase (MTHFR), both of which are important either directly or indirectly in maintaining genomic integrity. METHODS To evaluate the potential role of genetic variants within PHB and MTHFR in breast and ovarian cancer risk, 4102 BRCA1 and 2093 BRCA2 mutation carriers, and 6211 BRCA1 and 2902 BRCA2 carriers from the Consortium of Investigators of Modifiers of BRCA1 and BRCA2 (CIMBA) were genotyped for the PHB 1630 C>T (rs6917) polymorphism and the MTHFR 677 C>T (rs1801133) polymorphism, respectively. RESULTS There was no evidence of association between the PHB 1630 C>T and MTHFR 677 C>T polymorphisms with either disease for BRCA1 or BRCA2 mutation carriers when breast and ovarian cancer associations were evaluated separately. Analysis that evaluated associations for breast and ovarian cancer simultaneously showed some evidence that BRCA1 mutation carriers who had the rare homozygote genotype (TT) of the PHB 1630 C>T polymorphism were at increased risk of both breast and ovarian cancer (HR 1.50, 95%CI 1.10-2.04 and HR 2.16, 95%CI 1.24-3.76, respectively). However, there was no evidence of association under a multiplicative model for the effect of each minor allele. CONCLUSION The PHB 1630TT genotype may modify breast and ovarian cancer risks in BRCA1 mutation carriers. This association need to be evaluated in larger series of BRCA1 mutation carriers.
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Affiliation(s)
- A Jakubowska
- Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland.
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Fischer C, Engel C, Sutter C, Zachariae S, Schmutzler R, Meindl A, Heidemann S, Grimm T, Goecke TO, Debatin I, Horn D, Wieacker P, Gadzicki D, Becker K, Schäfer D, Stock F, Voigtländer T. BRCA1/2testing: uptake, phenocopies, and strategies to improve detection rates in initially negative families. Clin Genet 2011; 82:478-83. [DOI: 10.1111/j.1399-0004.2011.01788.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sutter C, Jean-Charles A, Merle H. [Clinical and paraclinical course of melanocytoma of the optic disk. Contribution of spectral- and time-domain OCT in the study of 10 patients]. J Fr Ophtalmol 2011; 34:615-23. [PMID: 21663999 DOI: 10.1016/j.jfo.2011.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Accepted: 02/01/2011] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Melanocytoma of the optic disk is a rare, benign, slow-growing tumor. We analyzed the clinical and paraclinical features of melanocytomas followed at the Fort-de-France University Hospital to expose and compare characteristics from new clinical imaging. PATIENTS AND METHOD This was a prospective study of 10 patients with a melanocytoma of the optic disk. The principal features studied were the ophthalmoscopic findings, the visual field defects, fluorescein angiography features, and the comparison between standard time-domain optical coherence tomography (OCT) characteristics and the latest spectral-domain OCT findings. RESULTS The mean age of the patients at diagnosis was 49.2 years. All the patients were from the French West Indies. The lesion was discovered incidentally in 90% of the cases. Visual acuity was normal in 70% of the cases. Visual field defects were present at the first visit in 80% of the cases. Tumor growth was monitored in 50% of the cases during a mean follow up of 4.8 years. The in-depth extension into chorioretina and laterally into the retina were better visualized in spectral-domain OCT than in time-domain OCT as hyperreflective granular dots. CONCLUSION Optic disk melanocytoma appears to be a singular benign tumor that is seen more frequently in dark-skinned patients. Most melanocytomas do not cause significant visual impairment but can show substantial growth in size for many years of follow-up. A malignant transformation is always to fear in case of atypical development. Spectral domain OCT seems to be an important tool in the assessment of extension and follow-up.
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Affiliation(s)
- C Sutter
- Service d'ophtalmologie, hôpital Pierre-Zobda-Quitman, CHU de Fort-de-France, BP 632, 97261 Fort-de-France cedex, Martinique, France
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Sutter C, Oehl M, Armbrüster C. Practice and carryover effects when using small interaction devices. Appl Ergon 2011; 42:437-444. [PMID: 20934683 DOI: 10.1016/j.apergo.2010.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 08/02/2010] [Accepted: 09/02/2010] [Indexed: 05/30/2023]
Abstract
The use of interaction devices in modern work often challenges the human motor system, especially when these devices introduce unfamiliar transformations to the user. In this paper we evaluated expert performance and skill differences between experts and novices when using small motion- and force-controlled interaction devices (touchpad and mini-joystick) in an applied text-editing task. Firstly, experts performed better with their familiar input device than with an unfamiliar one. Particularly touchpad experts operating the unfamiliar mini-joystick showed highly asymmetric carryover costs. Results showed that the efficient performance of experts depended on domain-specific skills, which were not transferable. Secondly, with considerable practice (more than observed for simple and short tasks) novices were brought up to higher levels of performance. The motion-transformation between hand and cursor action was easier in understanding and application than the force-transformation. Thus, the touchpad was used more efficiently than the mini-joystick. In conclusion, practice effects found so far are considerably underestimated when it comes to an applied task. The results give reason to develop and implement skill-sensitive training procedures, since the acquisition of domain-specific skills is critical for expert performance. As a consequence, training procedures might be essential for complex applications and/or unfamiliar device transformations.
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Affiliation(s)
- C Sutter
- RWTH Aachen University, Department of Psychology, Jägerstraße 17-19, Aachen, Germany.
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Dick MG, Versmold B, Engel C, Sutter C, Schmutzler RK. Association of death receptor 4 variant (Glu228Ala) with ovarian cancer risk in BRCA1-mutation carriers. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.1537] [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: 11/20/2022] Open
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Sutter R, Shakhova O, Bhagat H, Behesti H, Sutter C, Penkar S, Santuccione A, Bernays R, Heppner FL, Schüller U, Grotzer M, Moch H, Schraml P, Marino S. Cerebellar stem cells act as medulloblastoma-initiating cells in a mouse model and a neural stem cell signature characterizes a subset of human medulloblastomas. Oncogene 2010; 29:1845-56. [PMID: 20062081 DOI: 10.1038/onc.2009.472] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [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
Cells with stem cell properties have been isolated from various areas of the postnatal mammalian brain, most recently from the postnatal mouse cerebellum. We show here that inactivation of the tumor suppressor genes Rb and p53 in these endogenous neural stem cells induced deregulated proliferation and resistance to apoptosis in vitro. Moreover, injection of these cells into mice formed medulloblastomas. Medulloblastomas are the most common malignant brain tumors of childhood, and despite recent advances in treatment they are associated with high morbidity and mortality. They are highly heterogeneous tumors characterized by a diverse genetic make-up and expression profile as well as variable prognosis. Here, we describe a novel ontogenetic pathway of medulloblastoma that significantly contributes to understanding their heterogeneity. Experimental medulloblastomas originating from neural stem cells preferentially expressed stem cell markers Nestin, Sox2 and Sox9, which were not expressed in medulloblastomas originating from granule-cell-restricted progenitors. Furthermore, the expression of these markers identified a subset of human medulloblastomas associated with a poorer clinical outcome.
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Affiliation(s)
- R Sutter
- Neuroscience Centre, Blizard Institute of Cell and Molecular Science, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
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Sinilnikova OM, Antoniou AC, Simard J, Healey S, Léoné M, Sinnett D, Spurdle AB, Beesley J, Chen X, Greene MH, Loud JT, Lejbkowicz F, Rennert G, Dishon S, Andrulis IL, Domchek SM, Nathanson KL, Manoukian S, Radice P, Konstantopoulou I, Blanco I, Laborde AL, Durán M, Osorio A, Benitez J, Hamann U, Hogervorst FBL, van Os TAM, Gille HJP, Peock S, Cook M, Luccarini C, Evans DG, Lalloo F, Eeles R, Pichert G, Davidson R, Cole T, Cook J, Paterson J, Brewer C, Hughes DJ, Coupier I, Giraud S, Coulet F, Colas C, Soubrier F, Rouleau E, Bièche I, Lidereau R, Demange L, Nogues C, Lynch HT, Schmutzler RK, Versmold B, Engel C, Meindl A, Arnold N, Sutter C, Deissler H, Schaefer D, Froster UG, Aittomäki K, Nevanlinna H, McGuffog L, Easton DF, Chenevix-Trench G, Stoppa-Lyonnet D. The TP53 Arg72Pro and MDM2 309G>T polymorphisms are not associated with breast cancer risk in BRCA1 and BRCA2 mutation carriers. Br J Cancer 2009; 101:1456-60. [PMID: 19707196 PMCID: PMC2768437 DOI: 10.1038/sj.bjc.6605279] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: The TP53 pathway, in which TP53 and its negative regulator MDM2 are the central elements, has an important role in carcinogenesis, particularly in BRCA1- and BRCA2-mediated carcinogenesis. A single nucleotide polymorphism (SNP) in the promoter region of MDM2 (309T>G, rs2279744) and a coding SNP of TP53 (Arg72Pro, rs1042522) have been shown to be of functional significance. Methods: To investigate whether these SNPs modify breast cancer risk for BRCA1 and BRCA2 mutation carriers, we pooled genotype data on the TP53 Arg72Pro SNP in 7011 mutation carriers and on the MDM2 309T>G SNP in 2222 mutation carriers from the Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA). Data were analysed using a Cox proportional hazards model within a retrospective likelihood framework. Results: No association was found between these SNPs and breast cancer risk for BRCA1 (TP53: per-allele hazard ratio (HR)=1.01, 95% confidence interval (CI): 0.93–1.10, Ptrend=0.77; MDM2: HR=0.96, 95%CI: 0.84–1.09, Ptrend=0.54) or for BRCA2 mutation carriers (TP53: HR=0.99, 95%CI: 0.87–1.12, Ptrend=0.83; MDM2: HR=0.98, 95%CI: 0.80–1.21, Ptrend=0.88). We also evaluated the potential combined effects of both SNPs on breast cancer risk, however, none of their combined genotypes showed any evidence of association. Conclusion: There was no evidence that TP53 Arg72Pro or MDM2 309T>G, either singly or in combination, influence breast cancer risk in BRCA1 or BRCA2 mutation carriers.
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Affiliation(s)
- O M Sinilnikova
- Unité Mixte de Génétique Constitutionnelle des Cancers Fréquents, Hospices Civils de Lyon, Centre Léon Bérard, Lyon 69373, France.
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Sutter C, Kerautret J, Colin J. 582 Utilisation de la colle biologique à base de fibrine dans la prise en charge chirurgicale du ptérygion. J Fr Ophtalmol 2009. [DOI: 10.1016/s0181-5512(09)73706-4] [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: 11/29/2022]
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Sutter C, Lemaire C, David T. 634 Tuberculose disséminée et granulome choroïdien. J Fr Ophtalmol 2008. [DOI: 10.1016/s0181-5512(08)71233-6] [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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Abstract
In the present study, the usability of two laptop input devices, touchpad and trackpoint, is evaluated. The focus is set on the impact of sensumotor transformation of input devices on practice and task difficulty. Thirty novices and 14 experts operated either touchpad or trackpoint over a period of 1600 trials of a point-click task. As hypothesized, novices and experts operated the touchpad by 15% faster compared to the trackpoint. For novices, performance rose distinctly and levelled off after 960 trials. This consolidation occurred earlier than reported in literature (1400-1600 trials) and, contrary to the assumption, learning was similar for touchpad and trackpoint. The impact of task difficulty dropped remarkably by practice, which points at a more general than specific task learning. In conclusion, ergonomic guidelines can be derived for the user-specific optimization of the usage of touchpad and trackpoint. Actual and potential applications of this research include the user-specific optimization of laptop input devices. Within the theoretical framework of psychomotor models, a profound knowledge of user behaviour in human-computer interaction is provided. Ergonomic guidelines can be derived for the efficient usage of laptop input devices and an optimized hardware and software design.
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Affiliation(s)
- C Sutter
- RWTH Aachen University, Department of Psychology, Jägerstrasse 17-19, 52056 Aachen, Germany.
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Armbrüster C, Sutter C, Ziefle M. Notebook input devices put to the age test: the usability of trackpoint and touchpad for middle-aged adults. Ergonomics 2007; 50:426-45. [PMID: 17536778 DOI: 10.1080/00140130601127885] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In two experiments, the usability of input devices integrated into computer notebooks was under study. The most common input devices, touchpad (experiment 1) and trackpoint (experiment 2) were examined. So far, the evaluation of mobile input devices has been restricted to younger users. However, due to ongoing demographic change, the main target group of mobile devices will be older users. Therefore, the present study focused on ageing effects. A total of 14 middle-aged (40-65 years) and 20 younger (20-32 years) users were compared regarding speed and accuracy of cursor control in a point-click and a point-drag-drop task. Moreover, the effects of training were addressed by examining the performance increase over time. In total, 640 trials per task and input device were executed. The results show that ageing is a central factor to be considered in input device design. Middle-aged users were significantly slower than younger users when executing the different tasks. Over time, a significant training effect was observed for both devices and both age groups, although the benefit of training was greater for the middle-aged group. Generally, the touchpad performance was higher than the trackpoint performance in both age groups, but the age-related performance decrements were less distinct when using the touchpad.
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Affiliation(s)
- C Armbrüster
- RWTH Aachen University, Jägerstrasse 17-19, 52056 Aachen, Germany.
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Baehring J, Sutter C, Kadmon M, Doeberitz MVK, Gebert J. A ‘Nonsense’ Mutation Leads to Aberrant Splicing of hMLH1 in a German Hereditary Non-polyposis Colorectal Cancer Family. Fam Cancer 2006; 5:195-9. [PMID: 16736291 DOI: 10.1007/s10689-006-6988-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 04/07/2005] [Accepted: 01/26/2006] [Indexed: 10/24/2022]
Abstract
Hereditary Non-polyposis Colorectal Cancer (HNPCC) is an autosomal dominant cancer predisposition syndrome caused by germline mutations in at least four genes encoding integral components of the cellular DNA mismatch repair (MMR) system. The spectrum of genetic alterations encompasses missense- and nonsense mutations, intronic mutations affecting splice donor or acceptor sites as well as small-scale deletions and insertions. We have identified a 'nonsense' mutation that activates a cryptic splice site generating an in frame deletion of the last 17 codons of exon1 of the hMLH1 gene causing HNPCC in a German family. We present a comprehensive genetic analysis of this family that demonstrates important aspects of HNPCC pathogenesis.
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Affiliation(s)
- J Baehring
- Department of General Surgery, University of Heidelberg, INF 110, Heidelberg, Germany
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30
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Buzello M, Findeisen P, Merx S, Sutter C, Wörner S, Gebert J, Knebel Doeberitz MV. Identification of a new monomorphic mononucleotide microsatellite marker and potential use for molecular characterisation in colorectal tumors. Pathol Res Pract 2004. [DOI: 10.1016/s0344-0338(04)80647-2] [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: 10/26/2022]
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31
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Müller W, Burgart LJ, Krause-Paulus R, Thibodeau SN, Almeida M, Edmonston TB, Boland CR, Sutter C, Jass JR, Lindblom A, Lubinski J, MacDermot K, Sanders DS, Morreau H, Müller A, Oliani C, Orntoft T, Ponz De Leon M, Rosty C, Rodriguez-Bigas M, Rüschoff J, Ruszkiewicz A, Sabourin J, Salovaara R, Möslein G. The reliability of immunohistochemistry as a prescreening method for the diagnosis of hereditary nonpolyposis colorectal cancer (HNPCC)--results of an international collaborative study. Fam Cancer 2003; 1:87-92. [PMID: 14574003 DOI: 10.1023/a:1013840907881] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.7] [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: 01/20/2023]
Abstract
Hereditary nonpolyposis colorectal cancer syndrome (HNPCC) is an autosomal dominant condition accounting for 2-5% of all colorectal carcinomas as well as a small subset of endometrial, upper urinary tract and other gastrointestinal cancers. An assay to detect the underlying defect in HNPCC, inactivation of a DNA mismatch repair enzyme, would be useful in identifying HNPCC probands. Monoclonal antibodies against hMLH1 and hMSH2, two DNA mismatch repair proteins which account for most HNPCC cancers, are commercially available. This study sought to investigate the potential utility of these antibodies in determining the expression status of these proteins in paraffin-embedded formalin-fixed tissue and to identify key technical protocol components associated with successful staining. A set of 20 colorectal carcinoma cases of known hMLH1 and hMSH2 mutation and expression status underwent immunoperoxidase staining at multiple institutions, each of which used their own technical protocol. Staining for hMSH2 was successful in most laboratories while staining for hMLH1 proved problematic in multiple labs. However, a significant minority of laboratories demonstrated excellent results including high discriminatory power with both monoclonal antibodies. These laboratories appropriately identified hMLH1 or hMSH2 inactivation with high sensitivity and specificity. The key protocol point associated with successful staining was an antigen retrieval step involving heat treatment and either EDTA or citrate buffer. This study demonstrates the potential utility of immunohistochemistry in detecting HNPCC probands and identifies key technical components for successful staining.
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Affiliation(s)
- W Müller
- Institute of Pathology, Heinrich Heine University, Düsseldorf, Germany
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32
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Keller M, Jost R, Haunstetter CM, Kienle P, Knaebel HP, Gebert J, Sutter C, Knebel-Doeberitz MV, Cremer F, Mazitschek U. Comprehensive genetic counseling for families at risk for HNPCC: impact on distress and perceptions. Genet Test 2003; 6:291-302. [PMID: 12537653 DOI: 10.1089/10906570260471822] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The aim of the study was to explore distress and health beliefs before and after comprehensive interdisciplinary counseling in families at risk for hereditary non-polyposis colorectal cancer (HNPCC). Results reported here were derived from a consecutive sample of 65 counselees [31 patients with colorectal cancer (CRC) and 34 unaffected at-risk persons] who participated in interdisciplinary counseling provided by human geneticists, surgeons, and psycho-oncologists before genetic testing. Data were collected from self-administered questionnaires before, as well as 4-6 weeks after, counseling. Distress and perceptions specific to HNPCC were assessed at both timepoints using standardized as well as author-derived instruments. Distress declined after counseling, as did worries related to HNPCC. An increase was found in personal belief in control of cancer risk, for instance, in the perceived efficacy of early detection of CRC. We also observed a trend toward greater anticipated ability to cope with a positive gene test after counseling. Changes after counseling were generally more pronounced for persons at risk, as compared to patients with cancer. The decrease in distress was partly attributable to an increase in personal self-confidence. One-third of the sample reported enhanced communication specific to hereditary disease within the family after counseling. A substantial minority, however, said they experienced increased worry and physical symptoms after counseling. Overall, counselees demonstrated less stress and perceived cancer threat as well as enhanced beliefs regarding personal control over cancer, suggesting an overall beneficial impact of comprehensive counseling. Further research is needed to identify those individuals most at risk for increased fear and worry related to HNPCC so that they may be most appropriately counseled.
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Affiliation(s)
- M Keller
- Psychosocial Care Unit, University Hospital Heidelberg, D-69120 Heidelberg, Germany.
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33
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Grips E, Wentzensen N, Sutter C, Sedlaczek O, Gebert J, Weigel R, Schwartz A, von Knebel-Doeberitz M, Hennerici M. [Glioblastoma multiforme as a manifestation of Turcot syndrome]. Nervenarzt 2002; 73:177-82. [PMID: 11975096 DOI: 10.1007/s00115-001-1233-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Turcot's syndrome, clinically characterized by the coincident occurrence of primary tumors of the colon and the central nervous system, can genetically be divided into two syndromes: familial adenomatous polyposis (FAP) and hereditary nonpolyposis colon carcinoma (HNPCC). In the present case, a 60-year-old patient with glioblastoma multiforme and a history of hereditary malignomas is described as an example of a HNPCC-associated Turcot's syndrome. New molecular biological methods and results give deeper insight into clinical syndromes, and the better understanding improves diagnostics, therapy, and outcome estimations, even in rare diseases. In the present case, a new germinal mutation could be identified.
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Affiliation(s)
- E Grips
- Neurologische Universitätsklinik Mannheim, Ruprecht-Karls-Universität Heidelberg, Theodor-Kutzer-Ufer 1-3, 68135 Mannheim
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34
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Sutter C, Hollister LR. Facilitating authenticity. Healthc Exec 2001; 16:50-1. [PMID: 11702425] [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] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- C Sutter
- Perrone-Ambrose Associates, Inc., 2 N. Riverside Plaza, Ste. 1433, Chicago, IL 60606, USA
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35
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Wüllenweber HP, Sutter C, Autschbach F, Willeke F, Kienle P, Benner A, Bähring J, Kadmon M, Herfarth C, von Knebel Doeberitz M, Gebert J. Evaluation of Bethesda guidelines in relation to microsatellite instability. Dis Colon Rectum 2001; 44:1281-9. [PMID: 11584201 DOI: 10.1007/bf02234785] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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] [Indexed: 01/02/2023]
Abstract
PURPOSE The Bethesda guidelines were developed for selection of patients whose tumors should be tested for high microsatellite instability. This study examined the validity of the different Bethesda criteria in relation to microsatellite instability status to simplify their use in clinical practice. METHODS A total of 164 patients with colorectal or hereditary nonpolyposis colorectal cancer-associated cancers were registered on the basis of the Amsterdam criteria without age limitations (11 cases), multiple tumors (2 cases), the accumulation of colorectal cancer in the family (no first-degree relatives affected or the index patient's age up to 50 years; 45 cases), an early age at onset up to 50 years (13 cases), morphologic and histopathologic manifestations (right-sided colorectal cancer, mucinous undifferentiated histology; 1 case), and the Bethesda criteria (92 cases). The microsatellite instability status of tumors was determined using the International Collaborative Group on Hereditary Non-Polyposis Colorectal Cancer marker reference panel. RESULTS When applying all Bethesda criteria, high microsatellite instability tumors were identified in our hereditary nonpolyposis colorectal cancer registry with a sensitivity of 87 percent. Twenty-nine percent (27/92) of the Bethesda-positive patients displayed high microsatellite instability compared with 6 percent of patients (4/72) not meeting these criteria (P < 0.001). Only Bethesda Criteria 1, 3, and 4 showed a significantly different distribution of the microsatellite instability status when compared with those of the remaining patients registered (P < or = 0.001). These three criteria detected high microsatellite instability tumors in 48 percent (10/21), 50 percent (18/36), and 31 percent (21/67) of patients, respectively. When applying these criteria only, a cumulative detection rate of 77 percent of all (24/31) high microsatellite instability cases was found, thereby identifying 89 percent of high microsatellite instability tumors among the Bethesda-positive patients. Patients matching Criteria 1, 3, and 4 frequently showed hMSH2 or hMLH1 germline mutations and tumor-specific loss of protein expression. CONCLUSION In our hereditary nonpolyposis colorectal cancer registry the complete Bethesda criteria showed the highest sensitivity to identify patients with high microsatellite instability tumors. However, for general medical practice outside academic centers, three criteria are reasonably accurate for adequate high microsatellite instability tumor selection.
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Affiliation(s)
- H P Wüllenweber
- Department of General Surgery, University of Heidelberg, Germany
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36
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Woerner SM, Gebert J, Yuan YP, Sutter C, Ridder R, Bork P, von Knebel Doeberitz M. Systematic identification of genes with coding microsatellites mutated in DNA mismatch repair-deficient cancer cells. Int J Cancer 2001; 93:12-9. [PMID: 11391615 DOI: 10.1002/ijc.1299] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Microsatellite instability (MSI) caused by deficient DNA mismatch-repair functions is a hallmark of cancers associated with the hereditary nonpolyposis colorectal cancer (HNPCC) syndrome but is also found in about 15% of all sporadic tumors. Most affected microsatellites reside in untranslated intergenic or intronic sequences. However, recently few genes with coding microsatellites were also shown to be mutational targets in MSI-positive cancers and might represent important mutation targets in their pathogenesis. The systematic identification of such genes and the analysis of their mutation frequency in MSI-positive cancers might thus reveal major clues to their functional role in MSI-associated carcinogenesis. We therefore initiated a systematic database search in 33,595 distinctly annotated human genes and identified 17,654 potentially coding mononucleotide repeats (cMNRs) and 2,028 coding dinucleotide repeats (cDNRs), which consist of n > or = 6 and n > or = 4 repeat units, respectively. Expression pattern and mutation frequency of 19 of these genes with the longest repeats were compared between DNA mismatch repair-deficient (MSI(+)) and proficient (MSS) cancer cells. Instability frequencies in these coding microsatellite genes ranged from 10% to 100% in MSI-H tumor cells, whereas MSS cancer cells did not show mutations. RT-PCR analysis further showed that most of the affected genes (10/15) were highly expressed in tumor cells. The approach outlined here identified a new set of genes frequently affected by mutations in MSI-positive tumor cells. It will lead to novel and highly specific diagnostic and therapeutic targets for microsatellite unstable cancers.
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Affiliation(s)
- S M Woerner
- Division of Molecular Diagnostics and Therapy, Department of Surgery, University of Heidelberg, Heidelberg, Germany
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37
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Schussler-Langeheine C, Weschke E, Mazumdar C, Meier R, Grigoriev AY, Kaindl G, Sutter C, Abernathy D, Grubel G, Richter M. Magnetic splitting of valence states in ferromagnetic and antiferromagnetic lanthanide metals. Phys Rev Lett 2000; 84:5624-5627. [PMID: 10991010 DOI: 10.1103/physrevlett.84.5624] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/1999] [Indexed: 05/23/2023]
Abstract
The magnetic splitting of Delta(2) valence states in the heavy lanthanide metals Gd, Tb, Dy, and Ho was studied in epitaxial films by angle-resolved photoemission, revealing an essentially Stoner-like temperature dependence in all cases. It scales linearly with the 4f spin moment, even in the case of the helical antiferromagnet Ho. Such a behavior can be explained by a substantial localization of the corresponding wave function in the c direction. The helical magnetic structure was confirmed for the thin Ho films by in situ resonant magnetic x-ray diffraction.
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Affiliation(s)
- C Schussler-Langeheine
- Institut fur Experimentalphysik, Freie Universitat Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany
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38
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Schimanski CC, Sutter C, Linnemann U, Berger MR. Sampling technique influences the detection of K-ras mutations in normal appearing mucosa of colorectal cancer patients. Int J Oncol 1999; 15:391-8. [PMID: 10402253 DOI: 10.3892/ijo.15.2.391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/06/2022] Open
Abstract
Based on three colorectal cancer cell lines with specified K-ras status, a sensitive PCR-RFLP assay was established detecting one K-ras mutant among 106 wild-type cells. Using this assay for tissues of 124 colorectal cancer patients, 59 tumor (46%) and 11 mucosa samples (9%) were found to harbor a K-ras mutation. When using the same scalpel for collecting tumor and mucosa tissues (group A), 18% of the patients had a matching K-ras mutation in both tissues, but this coincidence was seen in 3% of patients only, when separate scalpels were used (group B). Thus we conclude that the sampling technique used for collecting specimens is a major contributor to the detection of K-ras mutations in normal appearing mucosa when a highly sensitive detection technique is used.
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Affiliation(s)
- C C Schimanski
- Unit of Toxicology and Chemotherapy, German Cancer Research Centre, 69120 Heidelberg, Germany
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39
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Sutter C, Gebert J, Bischoff P, Herfarth C, von Knebel Doeberitz M. Molecular screening of potential HNPCC patients using a multiplex microsatellite PCR system. Mol Cell Probes 1999; 13:157-65. [PMID: 10208807 DOI: 10.1006/mcpr.1999.0231] [Citation(s) in RCA: 28] [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: 11/22/2022]
Abstract
Microsatellite instability (MSI) is a molecular hallmark of the H ereditary N on- P olyposis C olorectal C ancer (HNPCC) syndrome occurring in about 80-90% of the tumours and also in sporadic tumours of different organs, albeit at lower frequency. Highly unstable colorectal tumours (MSI-H) have different histopathological features and tend to have a better prognosis compared to neoplasms without (MSS) or with low levels of microsatellite instability (MSI-L). Since MSI classification allows the identification of potential HNPCC patients and might represent a valuable diagnostic parameter an increasing demand for high-throughput microsatellite analysis will arise. Therefore, we have adapted five diagnostic microsatellites, m(odified) ACTC, mBAT26, mD5S107, mD5S406 and mD13S153, to allow coamplification. Using this multiplex polymerase chain reaction (PCR) system 29 colorectal tumour tissues with known MSI status could be unambiguously identified as MSI-H (13 cases) or MSI-L/MSS (16 cases). Highly unstable colorectal tumour detection frequency of individual markers reached 77% (mD5S406), 85% (mACTC), 85% (mD5S107), 92% (D13S153) and 100% (mBAT26) showing similar sensitivity but improved specificity as compared with a microsatellite reference panel. In a prospective analysis of 31 colorectal tumours, the multiplex PCR system identified five MSI-H cases. Multiplex MSI PCR is a time saving and cost-effective method not restricted to specific technical equipment and applicable to a variety of microsatellite-based genotyping approaches.
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Affiliation(s)
- C Sutter
- Division of Molecular Diagnostics and Therapy, University Hospital, Im Neuenheimer Feld 116, Heidelberg, D-69120, Germany
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Wüllenweber HP, Sutter C, Kadmon M, Gebert J, von Knebel-Doeberitz M, Herfarth C. [Modification of surgical strategy in HNPCC by molecular and clinical aspects]. Langenbecks Arch Chir Suppl Kongressbd 1998; 115:1408-10. [PMID: 9931896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
Because of the positive correlation between Amsterdam criteria and positive MSI analysis, a subtotal colectomy with ileorectal anastomosis seems to be indicated in patients with positive Amsterdam criteria to eliminate the high risk of metachronous colon cancer. In patients with an identified mutation in one of the known mismatch repair genes, a subtotal colectomy is indicated as well. In patients with positive Bethesda criteria, apart from the Amsterdam criteria, a subtotal colectomy seems only to be indicated if a positive MSI analysis is available.
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Sutter C, Gebert J, Bischoff P, Kube D, Herfarth C, Knebel Doebentz M. DNA mismatch repair deficient tumors exhibit length variability of repetitive DNA sequences in diverse promoter regions. Eur J Cancer 1997. [DOI: 10.1016/s0959-8049(97)84419-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: 11/26/2022]
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Zinkin MP, McMorrow DF, Hill JP, Cowley RA, Lussier J, Gibaud A, Grübel G, Sutter C. Synchrotron x-ray-scattering study of the normal-incommensurate phase transition in Rb2ZnCl4. Phys Rev B Condens Matter 1996; 54:3115-3124. [PMID: 9986210 DOI: 10.1103/physrevb.54.3115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Friemann J, Varnai M, Sutter C, Hohr B, Behrens A, Althoff GH, Schilpkoter HW. Differential diagnosis of malignant tumours in the abdominal cavity of rats after intraperitoneal injection of crocidolite or benzo[a]pyrene. Exp Toxicol Pathol 1996; 48:13-7. [PMID: 8919266 DOI: 10.1016/s0940-2993(96)80085-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In our investigation (i.p. test), crocidolite and benzo[a]pyrene, both caused a progression from initially reactive, then autonomously transformed proliferation of myofibroblasts and undifferentiated mesenchymal cells to malignant, multidirectionally differentiated (desmin and ED-1 positive) fibro-histiocytic tumours. Immunohistochemically these tumours showed no morphological characteristics (for example co-expression of vimentin and keratin in spindle-shaped tumour cells) of human asbestos-associated malignant mesotheliomas. On the other hand many tumour cells induced by crocidolite and benzo[a]pyrene had an ultrastructural appearance resembling fibroblasts and myofibroblasts. These have been demonstrated in only a few desmoplastic and sarcomatous mesotheliomas in human beings. None of the tumours revealed the typical ultrastructural features of epitheloid or transitional mesotheliomas. Apparently, both carcinogenic substances induce the transformation of undifferentiated pluripotent mesenchymal cells in rat peritoneum, regardless of their localization in the submesothelial compartment or perivascular connective tissue (preferentially after crocidolite application) or in the connective tissue pseudocapsule of major benzo[a]pyrene containing beeswax/tricaprylin depots in the mesometrium and mesenterial fatty tissue. In this way asbestos fibres in this animal experiment do not seem to induce an arrest in differentiation of intermediate or immature mesothelial cells as supposed formerly, but rather affect undifferentiated mesenchyme cells and myofibroblasts. This is an explanation for the immunohistochemical expression of markers of muscular differentiation in these tumour cells, which is known to occur in human malignant fibro-histiocytic tumours. If supplementary immunohistochemical investigations with different keratin antibodies also fail to confirm the mesothelial differentiation of the tumours induced in our i.p. test, the decision to call them "mesotheliomas" should be reconsidered. Further immuno-transmission-electron microscopical investigations with intermediate filament or macrophage antibodies are needed to clarify whether the term malignant "fibrohistiocytic sarcoma", "mesenchymoma" or "mesothelioblastoma" would be more correct from the morphological point of view.
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Affiliation(s)
- J Friemann
- Department of Environmental Pathology, Medical Institute of Environmental Hygiene, Heinrich Heine University, Dusseldorf, Germany
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Abstract
The authors present two cases of clinical brain death that failed to meet the criteria for whole brain death using Tc-99m HMPAO. Conventional anterior cerebral flow studies demonstrated no intracerebral perfusion. Anterior static images also failed to show cerebral activity. However, the lateral images clearly demonstrate cerebellar activity. These cases demonstrate the importance of Tc-99m HMPAO as the agent of choice in evaluating brain death and the necessity of lateral views to meet the criteria for whole brain death. Cerebellar perfusion challenges the present criteria for whole brain death. New criteria must re-evaluate the present technology.
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Affiliation(s)
- M Spieth
- Department of Radiology, University of California, Davis Medical Center, USA
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45
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Ueda M, Kawamura H, Sutter C, Glick A, Yuspa SH, Strickland JE. Analysis of v-Ha-ras and v-fos oncogene transduction into a mouse epidermal cell line with "initiated" phenotype in culture but normal skin phenotype in vivo. Mol Carcinog 1995; 13:96-103. [PMID: 7605585 DOI: 10.1002/mc.2940130206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 01/26/2023]
Abstract
Cell line SCR722 was derived from adult SENCAR mouse epidermal cells initiated in culture by treatment with the carcinogen N-methyl-N'-nitro-N-nitrosoguanidine and selection for foci proliferating in medium with calcium levels that induce terminal differentiation in normal cells. Expansion of one of these foci and two additional cell clonings produced cell line SCR722, which was near-tetraploid and formed normal skin when grafted to athymic nude mouse hosts. However, unlike normal keratinocytes, SCR722 cells fail to suppress papilloma formation when grafted along with papilloma cell line SP-1. For optimum growth in culture, SCR722 cells required fibroblast-conditioned medium and 0.5 mM Ca2+. SCR722 cells had a wild-type c-Ha-ras gene but had lost their requirement for conditioned medium in culture and produced dysplastic papillomas in grafts when transduced with the v-Ha-ras gene. SCR722 cells stably expressing the v-fos gene produced normal epidermis in grafts, but when these cells were transduced with the v-Ha-ras gene, they produced carcinomas. Clones with greater expression of the transfected v-fos gene had a more invasive phenotype in vivo. These results indicate that carcinogen treatment of epithelial cells can result in an altered but nontumorigenic phenotype that may be at risk for becoming a more advanced neoplastic state with additional genetic alterations.
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Affiliation(s)
- M Ueda
- Laboratory of Cellular Carcinogenesis and Tumor Promotion, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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46
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Sutter C, Varnai M, Friemann J. P53 levels are elevated in diverse precancerous epidermal lesions, solid carcinomas, and chronically sun-expeosed epidermis. J Cancer Res Clin Oncol 1995. [DOI: 10.1007/bf02572075] [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: 11/29/2022]
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47
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Sutter C, Behrens A, Varnai M, Friemann J. Investigations of the presence of human papilloma virus (HPV) type 16 DNA in solar keratoses: Another possible cancer risk factor in concert with elevated P53 protein expression? J Cancer Res Clin Oncol 1995. [DOI: 10.1007/bf02572203] [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: 11/29/2022]
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48
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Sutter C, Greenhalgh DA, Ueda M, Abhyankar S, Ngai P, Hennings H, Schweizer J, Yuspa SH, Strickland JE. SENCAR mouse skin tumors produced by promotion alone have A to G mutations in codon 61 of the c-rasHa gene. Carcinogenesis 1994; 15:1975-8. [PMID: 7522983 DOI: 10.1093/carcin/15.9.1975] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
SENCAR mice, developed by selective breeding for high susceptibility to skin carcinogenesis by initiation with 7,12-dimethylbenz[a]anthracene and promotion with 12-O-tetradecanoylphorbol-13-acetate (TPA), form squamous papillomas in approximately 20% of animals treated repeatedly with TPA, without chemical initiation. DNA from eight skin tumors produced by a TPA-only protocol and four cell lines derived from these tumors was amplified by polymerase chain reaction and analyzed by discriminative oligonucleotide hybridization using oligomers specific for various c-rasHa gene codon 61 sequences. Five tumors and three cell lines had CAA (wild-type) to CGA mutations. In addition, one tumor had a CAA to CTA mutation, for a total of six of eight tumors having an activating mutation at this codon. Two tumors and one cell line had no codon 61 mutations detectable by this method. Since tumors derived from promotion-only protocols presumably originated from constitutively initiated cells, we examined tumor-free skins of untreated newborn and eight-month-old retired breeders and of 78-88-week-old SENCAR mice of both sexes, which were treated with TPA for 10 weeks starting at age 16-28 weeks and were untreated thereafter. Only the wild-type c-rasHa gene codon 61 sequence was seen, suggesting that the constitutively initiated cell population, if present, is below the limit of detection by this method.
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Affiliation(s)
- C Sutter
- Research Program II, German Cancer Research Center, Heidelberg
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Schneider BL, Bowden GT, Sutter C, Schweizer J, Han KA, Kulesz-Martin MF. 7,12-Dimethylbenz[a]anthracene-induced mouse keratinocyte malignant transformation independent of Harvey ras activation. J Invest Dermatol 1993; 101:595-9. [PMID: 8409529 DOI: 10.1111/1523-1747.ep12366051] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Independent clones of mouse keratinocytes initiated in vitro gave rise to tumor phenotypes typical of mouse skin multistage carcinogenesis and histologically similar to human tumors of the skin, and head and neck. High-molecular-weight genomic DNAs isolated from two 7,12-dimethylbenz[a]anthracene (DMBA)-initiated murine epithelial carcinoma cell lines and one papilloma cell line were examined for transforming activity by transfection into NIH3T3 cells. DNAs from each of these cell lines resulted in the formation of foci morphologically unlike foci containing an activated c-Ha-ras oncogene. Following polymerase chain reaction amplification of the c-Ha-ras gene, Xba I restriction analysis and oligonucleotide differential hybridization did not detect 61st, 12th, or 13th codon mutations. Southern and Northern analysis confirmed that the normal c-Ha-ras gene was not activated by amplification or overexpression. These results provide evidence that 7,12-dimethylbenz[a]anthracene-induced malignant transformation of murine keratinocytes occurred independent of point mutations associated with c-Ha-ras activation. The absence of an activated c-Ha-ras oncogene in these cell lines distinguishes our model from other mouse models of carcinogenesis and may provide a model for functional genetic changes during initiation and progression of human epithelial cancers.
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Affiliation(s)
- B L Schneider
- Department of Radiation Oncology, University of Arizona Medical School, Tucson 85724
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Sutter C, Strickland PT, Mukhtar H, Agarwal R, Winter H, Schweizer J. ras gene activation and aberrant expression of keratin K13 in ultraviolet B radiation-induced epidermal neoplasias of mouse skin. Mol Carcinog 1993; 8:13-9. [PMID: 7688967 DOI: 10.1002/mc.2940080106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Both papillomas and squamous cell carcinomas (SCC) induced in mouse epidermis by initiation with 7,12-dimethylbenz[a]anthracene (DMBA) and promotion with 12-O-tetradecanoylphorbol-13-acetate (TPA) exhibit aberrant expression of a type I keratin, K13, that is normally characteristic of terminal differentiation of internal stratified epithelia. There is evidence that the aberrant expression of K13 depends on the presence of an activated ras gene in mouse epidermal keratinocytes (Sutter et al., Mol Carcinog 4:467-476, 1991). To assess the general validity of this hypothesis, we investigated both aberrant K13 expression and activation of each of the three members of the ras gene family in epidermal tumors induced in four different mouse strains (SKH-1 hr, SENCAR, BALB/c, and C3H/He) by chronic irradiation with ultraviolet (UV) B. The tumor collection comprised nine papillomas and 30 well or poorly differentiated SCC. Aberrant K13 expression occurred in only five of 39 tumors and was restricted to SCC of both types. This indicates that aberrant K13 expression in UV-induced epidermal tumors was intrinsically different from that in chemically induced tumors. Polymerase chain reaction analysis of the tumors for different point mutations in codons 12, 13, and 61 of the Ha-ras and Ki-ras genes and in codon 61 of the N-ras gene revealed that only one of the well differentiated tumors from a SKH-1 hr mouse exhibited a GGA-->GAA mutation in codon 12 of the Ha-ras gene. Although this tumor was also positive for aberrant K13 expression, such a correlation could not be made for the remaining K13-expressing tumors. This indicates that the activation of one of the members of the ras gene family is not a general prerequisite for the aberrant expression of K13 in mouse epidermal keratinocytes.
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MESH Headings
- Animals
- Base Sequence
- Carcinoma, Squamous Cell/etiology
- Carcinoma, Squamous Cell/genetics
- Gene Expression Regulation, Neoplastic/genetics
- Gene Expression Regulation, Neoplastic/radiation effects
- Genes, ras/genetics
- Genes, ras/radiation effects
- Keratins/genetics
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C3H
- Molecular Sequence Data
- Neoplasms, Radiation-Induced/etiology
- Neoplasms, Radiation-Induced/genetics
- Papilloma/etiology
- Papilloma/genetics
- Point Mutation
- Skin Neoplasms/etiology
- Skin Neoplasms/genetics
- Transcriptional Activation
- Ultraviolet Rays
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Affiliation(s)
- C Sutter
- German Cancer Research Center, Research Program II, Heidelberg
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