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MRI characteristics and oncological follow-up of patients with ISUP grade group 4 or 5 prostate cancer. Abdom Radiol (NY) 2024; 49:192-201. [PMID: 37906272 PMCID: PMC10789849 DOI: 10.1007/s00261-023-04073-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 09/20/2023] [Accepted: 09/25/2023] [Indexed: 11/02/2023]
Abstract
OBJECTIVES To analyze multiparametric MRI (mpMRI) characteristics of patients with International Society of Urological Pathology (ISUP) grade group (GG) 4 or 5 prostate cancer (PC) and to correlate MRI parameters with the occurrence of biochemical recurrence (BCR) after radical prostatectomy (RPE). METHODS In this single-center cohort study consecutive patients with mpMRI and ISUP GG 4 or 5 PC were retrospectively analyzed. Clinical, MR-guided biopsy, and diagnostic mpMRI parameter were assessed. A subcohort of patients with RPE and follow-up was analyzed separately. A univariate and multivariate analyses were performed to determine parameters that are associated to patients with BCR after RPE. RESULTS 145 patients (mean age 70y, median PSA 10.9 ng/ml) were analyzed. 99% had a PI-RADS classification of 4 or 5, 48% revealed MRI T3 stage, and median diameter of the MRI index lesion (IL) was 15 mm. IL showed a median ADC value of 668 ×10-6 mm2/s and exhibited contrast enhancement in 94% of the cases. For patients with follow-up after RPE (n = 82; mean follow-up time 68 ± 27 m), MRI parameters were significantly different for contact length of the IL to the pseudocapsule (LCC), MRI T3 stage, and IL localization (p < 0.05). Higher PSAD and MRI T3 stage were independent parameters for the risk of BCR when incorporating clinical, biopsy, and MRI parameters. CONCLUSION ISUP GG 4 or 5 PC has distinctive characteristics on mpMRI and were detected on MRI in all cases. In addition, higher PSAD and MRI T3 stage were significant predictors for BCR after RPE.
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Unique [ 18F]FDG PET imaging pattern of drug-induced acute generalized exanthematous pustulosis within the SCAR-spectrum. Eur J Nucl Med Mol Imaging 2023; 50:1532-1533. [PMID: 36484789 PMCID: PMC10027823 DOI: 10.1007/s00259-022-06060-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/24/2022] [Indexed: 12/13/2022]
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Vergleich der diagnostischen Leistung des 18F-FDG PET/MRT, des MRT und der konventionellen Bildgebung beim N- und M-Staging des neu diagnostizierten Mammakarzinoms. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Auswirkungen einer Anti-TNF-Therapie auf die osteoblastische Aktivität bei ankylosierender Spondylitis – Eine prospektive Analyse von PET/MRT-Untersuchungen der Iliosakralgelenke und der Wirbelsäule. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Vergleich von 18F-FDG PET- und DWI-Datensätzen zur Beurteilung des Therapieansprechens von Lymphomen unter Chemotherapie. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Klinische Entscheidungshilfe für das axilläre Lymphknoten-Staging bei neu diagnostizierten Brustkrebspatientinnen auf der Grundlage von 18F-FDG PET/MRI und maschinellem Lernen. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Comparison of 3 T mpMRI and pelvic CT examinations for detection of lymph node metastases in patients with prostate cancer. Eur J Radiol 2022; 147:110110. [DOI: 10.1016/j.ejrad.2021.110110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/19/2021] [Accepted: 12/12/2021] [Indexed: 01/21/2023]
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Whole-Body Integrated [ 68Ga]PSMA-11-PET/MR Imaging in Patients with Recurrent Prostate Cancer: Comparison with Whole-Body PET/CT as the Standard of Reference. Mol Imaging Biol 2021; 22:788-796. [PMID: 31482413 DOI: 10.1007/s11307-019-01424-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE The aim of this study was to evaluate the detection rate of [68Ga]prostate-specific membrane antigen ([68Ga]PSMA-11) positron emission tomography (PET)/magnetic resonance imaging (MRI) and to compare it with [68Ga]PSMA-11 PET/X-ray computed tomography (CT) in patients with recurrent prostate cancer (PC) after radical prostatectomy. PROCEDURES A total of 93 patients with biochemically recurrent prostate cancer underwent [68Ga]PSMA-11 PET/CT and subsequently a whole-body integrated PET/MRI examination. Board certified nuclear medicine physicians and radiologists evaluated PET/CT and PET/MRI datasets regarding identification of tumor lesions ((i) lymph nodes, (ii) bone lesions, (iii) local recurrence, and (iv) parenchymal lesions) based on maximum [68Ga]PSMA-11 uptake as well as morphological changes. Quality of PET images for both PET/CT and PET/MRI were rated using a 5-point scoring system by evaluating lesion homogeneity, contrast, contour, and delineation. Wilcoxon signed-rank tests were used to determine statistical differences. RESULTS PC relapse was detected in 62/93 patients. PET/MRI detected 148 out of 150 lesions described in PET/CT. In addition, PET/MRI detected 11 lesions not detected in PET/CT (5 lymph nodes, 6 local recurrences). The exact McNemar statistical test (one-sided) showed significant difference between PET/CT and PET/MRI for diagnosis of local recurrence (p value = 0.031). Diagnostic confidence for (iii) was higher in PET/MRI compared with PET/CT (PET/CT = 1.1; PET/MRI = 4.9). Diagnostic confidence for (i) (PET/CT = 4.9; PET/MRI = 4.6), (ii) (PET/CT = 4.9; PET/MRI = 4.6), and (iv) (PET/CT = 4.6; PET/MRI = 4.8) was equivalent between PET/MRI and PET/CT. CONCLUSIONS Integrated [68Ga]PSMA-11 PET/MRI provides a similarly high diagnostic performance for localization of recurrent PC as PET/CT. For the detection of local recurrences [68Ga]PSMA-11 PET/MRI is superior compared with [68Ga]PSMA-11 PET/CT.
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PSMA PET/CT vs. CT alone in newly diagnosed biochemical recurrence of prostate cancer after radical prostatectomy: Comparison of detection rates and therapeutic implications. Eur J Radiol 2021; 136:109556. [PMID: 33485127 DOI: 10.1016/j.ejrad.2021.109556] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/10/2021] [Accepted: 01/15/2021] [Indexed: 10/22/2022]
Abstract
OBJECTIVES To compare prostate specific membrane antigen (PSMA) Positron Emission Tomography/Computed Tomography (PET/CT) and computed tomography (CT) alone for the detection of biochemical recurrence of prostate cancer (PCa) and effect on treatment. METHODS This retrospective study included 59 patients with recently recorded biochemical recurrence of PCa (mean PSA 1.96 ± 1.64 ng/mL) after radical prostatectomy. Patients received PET/CT with either 68Ga-PSMA-11 (n = 36) or 18F-PSMA-1007 (n = 23). PET/CT and CT images were evaluated separately in regard to PCa lesion count, type, and localisation by two physicians. Histopathology, follow-up imaging and PSA levels after salvage irradiation served as reference standard. A McNemar test was used to compare detection rates. Changes in therapeutic approaches based on staging differences between CT alone and PET/CT were assessed in a virtual multidisciplinary tumour board. RESULTS There were 142 lesions in 50 of 59 patients. PSMA PET/CT detected 141 lesions (99.3 %) in 50 patients (84.7 %), while CT detected 72 lesions (50.7 %) in 29 patients (49.2 %). A significantly higher detection rate of PSMA PET/CT was observed on a lesion-based analysis (p < 0.0001) and on a patient based analysis (p < 0.0001). Herein, both 68Ga- and 18F-PSMA PET/CT performed significantly better than CT alone (p < 0.0001, respectively). In 9 patients (15.3 %) no relapse was detectable by either modality. All lesions detected by CT were also detected by PSMA PET/CT. In 38 patients PSMA PET/CT detected more lesions than CT alone, altering the treatment approach in 22 of these patients. CONCLUSION PSMA PET/CT is superior to CT alone in detecting biochemical recurrence in PCa patients after radical prostatectomy and offered additional therapeutic options in a substantial number of patients.
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SAT0365 EFFECTS OF ANTI-TNF-THERAPY ON OSTEOBLASTIC ACTIVITY IN ANKYLOSING SPONDYLITIS – RESULTS FROM A PROSPECTIVE STUDY USING PET-MRI OF SIJ AND SPINE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:The clinical efficacy of tumor necrosis factor inhibitors (TNFi) in patients with axial spondyloarthritis (axSpA) is well established but its effect on new bone formation is still unclear (1). Positron emission tomography (PET) using bone-seeking18F-Fluoride [18F]F in combination with magnetic resonance imaging ([18F]F /MRI) has been shown to depict not only bone marrow edema (BME) but also shows the quantity of tracer uptake in the late phase of perfusion suggestive of remodeling and osteoblastic activity, not only in radiographic axSpA (r-axSpA) (2).Objectives:Assess the effect of TNFi on bone remodeling processes in the axial skeleton of r-axSpA patients using [18F]F/MRI prior (baseline, BL) and 4 months after (follow-up, FU) treatment.Methods:Patients (11 male, 5 female, mean age 38.6±12.0 years) with clinically active r-axSpA (BASDAI>4, failure of NSAIDs, no previous biologics) prospectively underwent 3-Tesla and [18F]F PET/MRI (40 minutes after injection of a mean activity of 157 MBq [18F]F). Images of the SIJ (n=16 patients) and the whole spine (n=10 patients) were performed at BL and FU. Three readers (1 for [18F]F/MRI and 2 for conventional MRI) evaluated all images independently and blinded to timepoint allocation. Only lesions on which all readers agreed on were used for further analyses. Inflammation (bone marrow edema, BME), structural lesions (fat deposition (FD), sclerosis, erosions and ankylosis) and focal [18F]F uptake were recorded on the level of SIJ (SIJ-Q) and vertebral quadrants (V-Q), with each SIJ or vertebral body consisting of 4 VQs (superior and inferior sacral and iliac for the SIJ, and superior and inferior, anterior and posterior for the vertebral bodies).Results:A total of 128 SIJ-Q and 920 VQs were analyzed at both BL and FU. In the SIJs, 75 (58.6%), 120 (93.8%), 69 (53.9%), 99 (77.3%) and 16 (12.5%) SIJ-Q showed BME, FD, sclerosis, erosions and ankylosis, while 111 (86.7%) SIJ-Q showed focal [18F]F-uptake at BL. Association with increased [18F]F-uptake was found most frequently in SIJ-Q with BME (70/75 SIJ-Q, 93.3%), sclerosis (65/69 SIJ-Q, 94.2%) and FD (105/120 SIJ-Q, 87.5%). At FU, 37 SIJ-Q still showed BME (improvement by 50.7%), while almost no changes were observed in chronic lesions. In comparison, improvement of focal [18F]F-uptake was found in all lesion combinations, with improvement of focal [18F]F-lesions associated with BME by 62.9%, with sclerosis by 33.8% and with FD by 22.9% of SIJ-Q.In the spine, only 41 (4.5%), 61 (6.6%), 14 (1.5%) V-Q showed BME, FD and sclerosis, respectively, while 77 V-Q (8.4%) showed focal [18F]F-uptake. An association to increased [18F]F-uptake was found most frequently with sclerosis (7/14 V-Q, 50%) and FD (25/61 V-Q, 41%). At FU, 12 V-Q still showed BME (improvement by 70.7%), while, similar to SIJ, almost no changes were observed in the chronic lesions. The largest improvement was found in focal [18F]F-lesions associated with BME 81.8% and with FD by 22.9% of V-Q.Conclusion:In this first prospective study on whole spine and SIJ [18F]F/MRI in patients with r-axSpA, a significant decrease of osteoblastic activity was observed over 4 months of continuous anti-TNF treatment. The effect of treatment was observed not only at sites with inflammatory lesions (BME) but also at sites with pre-existing chronic structural lesions, while some osteoblastic activity remained visible at 4 months. These data support a short-term effect of anti-TNF treatment on osteoblastic activity, while the long-term effects need to be further studied.References:[1]Van der Heijde D et al, Ann Rheum Dis 2017[2]Buchbender C et al, J Rheumatol 2015This work was supported by an unrestricted Grant by MSD GmbH, GermanyDisclosure of Interests:Xenofon Baraliakos Grant/research support from: Grant/research support from: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Consultant of: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Speakers bureau: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Styliani Tsiami: None declared, Christoph Rischpler: None declared, Nils-Martin Bruckmann: None declared, Wolfgang Fendler: None declared, Julian Kirchner: None declared, Ken Hermann: None declared, Lino Sawicki: None declared, Juergen Braun Grant/research support from: Abbvie (Abbott), Amgen, BMS, Boehringer, Celgene, Celltrion, Centocor, Chugai, Eli Lilly and Company, Medac, MSD (Schering Plough), Mundipharma, Novartis, Pfizer (Wyeth), Roche, Sanofi- Aventis, and UCB Pharma, Consultant of: Abbvie (Abbott), Amgen, BMS, Boehringer, Celgene, Celltrion, Centocor, Chugai, EBEWE Pharma, Eli Lilly and Company, Medac, MSD (Schering-Plough), Mundipharma, Novartis, Pfizer (Wyeth), Roche, Sanofi-Aventis, and UCB Pharma, Speakers bureau: Abbvie (Abbott), Amgen, BMS, Boehringer, Celgene, Celltrion, Centocor, Chugai, EBEWE Pharma, Eli Lilly and Company, Medac, MSD (Schering-Plough), Mundipharma, Novartis, Pfizer (Wyeth), Roche, Sanofi-Aventis, and UCB Pharma
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A Multi-Center Study of BAL CXCR3 Chemokines during Allograft Injury after Lung Transplantation. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Agreement between Fried Frailty Phenotype and Cumulative Deficits Frailty Indices: A Prospective Multi-Center Study. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Improvements in Health-Related Quality of Life with Lung Transplantation: A Prospective Multicenter Cohort Study. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Acute Rejection (AR) and Lymphocytic Bronchiolitis (LB) in a Multicenter Lung Transplant Cohort. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Langzeitverlaufs- und Therapiekontrolle eines hepatisch metastasierenden Azinuszellkarzinoms des Pankreas mittels FDG-PET. Nuklearmedizin 2018. [PMID: 9728347 DOI: 10.1055/s-0038-1632330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ZusammenfassungEine 33jährige Patientin fiel klinisch erstmals aufgrund krampfartiger rechtsseitiger Oberbauchschmerzen auf. Sonographisch fanden sich mehrere Leberherde mit ungleichmäßigem Echomuster, die computer- tomographisch und szintigraphisch übereinstimmend als fokal noduläre Hyperplasie (FNH) interpretiert wurden. Ein in der Folge zu beobachtender starker Lipaseanstieg wurde unter der Verdachtsdiagnose einer akuten Pankreatitis konservativ behandelt, worauf eine kurzfristige Senkung der Serumlipase zu beobachten war. Wenige Monate später kam es erneut zu einer massiven abdominellen Schmerzsymptomatik zusammen mit einer meßbaren Zunahme des Bauchumfangs und palpablen Knoten in der Leber. Sowohl die Leberfunktionsszintigraphie als auch die statische Leberszintigraphie zeigten eine deutlich reduzierte Perfusion, Funktion und RES-Aktivität im Bereich der Raumforderungen. Eine anschließend durchgeführte Positronen-Emissions-Tomographie (PET) mit F-18-Fluorodeoxyglukose (FDG) wies einen erheblich gesteigerten Glukosemetabolismus der intrahepatischen Raumforderungen nach. Die Histologie mehrerer Biopsien ergab eine hepatische Metastasierung eines Azinuszellkarzinoms des Pankreas. Unter einer daraufhin eingeleiteten systemischen und regionalen Chemotherapie konnte zunächst eine deutliche Remission erreicht werden, die sich auch durch eine Kon- troll-FDG-PET sehr gut objektivieren ließ. Im weiteren Verlauf kam es dann allerdings wieder zu einer deutlichen Tumorprogression, die in einer nachfolgenden PET sowohl als Größenzunahme der Raumforderungen als auch durch einen zunehmenden Glukosemetabolismus semiquantitativ erfaßbar war. Die Patientin verstarb im Leberausfallkoma 15 Monate nach histologischer Stellung der Diagnose.
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11C-MET PET/MRI for detection of recurrent glioma. Eur J Nucl Med Mol Imaging 2017; 45:593-601. [PMID: 29282517 DOI: 10.1007/s00259-017-3916-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 12/11/2017] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Radiological assessment of brain tumors is widely based on the Radiology Assessment of Neuro-Oncology (RANO) criteria that consider non-specific T1 and T2 weighted images. Limitation of the RANO criteria is that they do not include metabolic imaging techniques that have been reported to be helpful to differentiate treatment related changes from true tumor progression. In the current study, we assessed if the combined use of MRI and PET with hybrid 11C-MET PET/MRI can improve diagnostic accuracy and diagnostic confidence of the readers to differentiate treatment related changes from true progression in recurrent glioma. METHODS Fifty consecutive patients with histopathologically proven glioma were prospectively enrolled for a hybrid 11C-MET PET/MRI to differentiate recurrent glioma from treatment induced changes. Sole MRI data were analyzed based on RANO. Sole PET data and in a third evaluation hybrid 11C-MET-PET/MRI data were assessed for metabolic respectively metabolic and morphologic glioma recurrence. Diagnostic performance and diagnostic confidence of the reader were calculated for the different modalities, and the McNemar test and Mann-Whitney U Test were applied for statistical analysis. RESULTS Hybrid 11C-MET PET/MRI was successfully performed in all 50 patients. Glioma recurrence was diagnosed in 35 of the 50 patients (70%). Sensitivity and specificity were calculated for MRI (86.11% and 71.43%), for 11C-MET PET (96.77% and 73.68%), and for hybrid 11C-MET-PET/MRI (97.14% and 93.33%). For diagnostic accuracy hybrid 11C-MET-PET/MRI (96%) showed significantly higher values than MRI alone (82%), whereas no significant difference was found for 11C-MET PET (88%). Furthermore, by rating on a five-point Likert scale significantly higher scores were found for diagnostic confidence when comparing 11C-MET PET/MRI (4.26 ± 0,777) to either PET alone (3.44 ± 0.705) or MRI alone (3.56 ± 0.733). CONCLUSION This feasibility study showed that hybrid PET/MRI might strengthen RANO classification by adding metabolic information to conventional MRI information. Future studies should evaluate the clinical utility of the combined use of 11C-MET PET/MRI in larger patient cohorts.
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Nutzen von Kontrastmittelgabe und DWI in der 18F-FDG PET/MRT für die Bestimmung des Tumorstadiums bei Lymphom-Patienten. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Evaluation praktischer Hindernisse in der Beurteilung der 68Ga-PSMA PET/CT bei 55 Patienten: Physiologische Tracerverteilung und inzidenteller Uptake. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ultra-Fast 18F-FDG PET/MRT im Vergleich zu 18F-FDG PET/CT und CT beim Ganzkörper-Staging von Frauen mit Rezidiv eines Beckentumors. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Vergleich der diagnostischen Genauigkeit der integrierten 18F-FDG PET/MRT im Vergleich zur MRT zur Detektion lokaler Rezidive bei Weichteilsarkomen. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Pilotevaluation einer 2-phasigen 18F-Fluoride PET/MRT der Sakroiliakalgelenke bei Patienten mit M. Bechterew. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ganzkörper-Staging von Patienten mit Brustkrebsrezidiven: Vergleich der 18F-FDG PET/MRT mit der 18F-FDG PET/CT, MRT und CT. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Vergleich der simultanen 18F-FDG PET/MRT und der 18F-FDG PET/CT bezüglich der Detektierbarkeit und Charakterisierung intrapulmonaler Rundherde bei 121 onkologischen Patienten. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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3-Component synthesis of α-substituted sulfonamides via Brønsted acid-catalyzed C(sp3)–H bond functionalization of 2-alkylazaarenes. Org Biomol Chem 2016; 14:5525-8. [DOI: 10.1039/c6ob00108d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Brønsted acid-catalyzed addition of 2-alkylazaarenes to in situ generated N-sulfonylimines through selective C(sp3)–H bond functionalization has been developed.
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Geheimrat Prof. Dr. med. Paul Krause (1871–1934) – Pionier der Röntgendiagnostik und frühes Opfer des nationalsozialistischen Regimes. ROFO-FORTSCHR RONTG 2015; 187:817-20. [DOI: 10.1055/s-0035-1553436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Thoracic impedance (TI) denotes the electrical resistance that is measured between the right ventricular lead and the can of an implantable cardioverter-defibrillator. It is used in medical diagnostics for fluid load monitoring in heart failure patients. We analysed TI for diurnal and weekly components that go along with the recurrent patterns of daily life.TI was measured in 53 patients over 280 d each with a resolution of 1 h. Information about the patients' professional occupation and typical sleeping rhythm was sought. Periodic signal components were identified in the amplitude spectrum, and their main characteristics were derived by cosinor analysis. The typical daily and weekly pattern were reconstructed by Fourier filtering.The Fourier spectrum indicates a strong circadian and a weaker circaseptan component in TI. The latter is significantly elevated in patients who regularly go to work, on error level [Formula: see text]. Cosinor analysis states a significant circadian rhythm in all patients ([Formula: see text]), with MESOR 61.8 [Formula: see text], amplitude 1.9 [Formula: see text], and acrophase 17.5 h. A significant weekly rhythm is found in 25 patients ([Formula: see text]), with amplitude 0.31 [Formula: see text] and acrophase typically on Wednesday. Both rhythms typically obtain their maximum during the 'active' phase of the period in daily life, i.e. in the afternoon and on working days, respectively, while the minimum is reached in the 'recreative' phase.Circadian and circaseptan variation are hence prevalent components of TI, which can induce impedance changes of several Ohms and thus be an error source for daily TI measurements.
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Lung Infarction Following Pulmonary Embolism: A Comparative Study on Clinical Conditions and CT Findings to Identify Predisposing Factors. ROFO-FORTSCHR RONTG 2015; 187:440-4. [PMID: 25750111 DOI: 10.1055/s-0034-1399006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE The aim of this study was to identify factors predisposing to lung infarction in patients with pulmonary embolism (PE). MATERIALS AND METHODS We performed a retrospective analysis on 154 patients with the final diagnosis of PE being examined between January 2009 and December 2012 by means of a Toshiba Aquilion 64 CT scanner. The severity of clinical symptoms was defined by means of a clinical index with 4 classes. The pulmonary clot load was quantified using a modified severity index of PE as proposed by Miller. We correlated several potential predictors of pulmonary infarction such as demographic data, pulmonary clot burden, distance of total vascular obstruction and pleura, the presence of cardiac congestion, signs of chronic bronchitis or emphysema with the occurrence of pulmonary infarction. RESULTS Computed tomography revealed 78 areas of pulmonary infarction in 45/154 (29.2 %) patients. The presence of infarction was significantly higher in the right lung than in the left lung (p < 0.001). We found no correlation between pulmonary infarction and the presence of accompanying malignant diseases (r = -0.069), signs of chronic bronchitis (r = -0.109), cardiac congestion (r = -0.076), the quantified clot burden score (r = 0.176), and the severity of symptoms (r = -0.024). Only a very weak negative correlation between the presence of infarction and age (r = -0.199) was seen. However, we could demonstrate a moderate negative correlation between the distance of total vascular occlusion and the occurrence of infarction (r = -0.504). CONCLUSION Neither cardiac congestion nor the degree of pulmonary vascular obstruction are main factors predisposing to pulmonary infarction in patients with PE. It seems that a peripheral total vascular obstruction more often results in infarction than even massive central clot burden.
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Endobronchial Ultrasound-guided Transbronchial Needle Aspiration in Anthracosis of Mediastinal Lymph Nodes: Correlation with Computed Tomography Findings. HONG KONG JOURNAL OF RADIOLOGY 2014. [DOI: 10.12809/hkjr1413225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Chest CT findings in EBUS-TBNA-proven anthracosis in enlarged mediastinal lymph nodes. ROFO-FORTSCHR RONTG 2014; 186:1122-6. [PMID: 24955645 DOI: 10.1055/s-0034-1366595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE We demonstrate the multislice computed tomography (MSCT) findings of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA)-proven hilar and mediastinal lymph node enlargement with signs of anthracosis. MATERIALS AND METHODS 53 enlarged lymph nodes in 39 patients (28 male, 11 female) with EBUS-TBNA-confirmed anthracosis were analyzed retrospectively. RESULTS The mean short axis diameter of the enlarged lymph nodes with signs of anthracosis was 13.7 mm. Lymph nodes most often showed an oval shape (84 %) and were well defined in 66 % of cases. Lymph node confluence was observed in 32 % of cases. Calcifications were documented in 24.5 % of cases. Contrast enhancement and fatty involution were seen seldom (3.8 %). Lymph node necrosis was not seen. CONCLUSION Lymph node anthracosis may be found most often in enlarged, well defined lymph nodes with an oval shape, frequently associated with confluence and calcifications.
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Individual calling to the feeding station can reduce agonistic interactions and lesions in group housed sows1. J Anim Sci 2012; 90:5013-20. [DOI: 10.2527/jas.2011-4478] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Totally implantable venous power ports of the forearm and the chest: initial clinical experience with port devices approved for high-pressure injections. Br J Radiol 2012; 85:e966-72. [PMID: 22674705 DOI: 10.1259/bjr/33224341] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVES To evaluate the technical success, clinical outcome and safety of percutaneously placed totally implantable venous power ports (TIVPPs) approved for high-pressure injections, and to analyse their value for arterial phase CT scans. METHODS Retrospectively, we identified 204 patients who underwent TIVPP implantation in the forearm (n=152) or chest (n=52) between November 2009 and May 2011. Implantation via an upper arm (forearm port, FP) or subclavian vein (chest port, CP) was performed under sonographic and fluoroscopic guidance. Complications were evaluated following the standards of the Society of Interventional Radiology. Power injections via TIVPPs were analysed, focusing on adequate functioning and catheter's tip location after injection. Feasibility of automatic bolus triggering, peak injection pressure and arterial phase aortic enhancement were evaluated and compared with 50 patients who had had power injections via classic peripheral cannulas. RESULTS Technical success was 100%. Procedure-related complications were not observed. Catheter-related thrombosis was diagnosed in 15 of 152 FPs (9.9%, 0.02/100 catheter days) and in 1 of 52 CPs (1.9%, 0.002/100 catheter days) (p<0.05). Infectious complications were diagnosed in 9 of 152 FPs (5.9%, 0.014/100 catheter days) and in 2 of 52 CPs (3.8%, 0.003/100 catheter days) (p>0.05). Arterial bolus triggering succeeded in all attempts; the mean injection pressure was 213.8 psi. Aortic enhancement did not significantly differ between injections via cannulas and TIVPPs (p>0.05). CONCLUSIONS TIVPPs can be implanted with high technical success rates, and are associated with low rates of complications if implanted with sonographic and fluoroscopic guidance. Power injections via TIVPPs are safe and result in satisfying arterial contrast. Conventional ports should be replaced by TIVPPs.
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Abstract
Bedding influences various parameters in the housing of laboratory mice, such as health, physiology and behaviour (often considered as being integral parts of welfare). Notwithstanding existent studies about bedding preferences of individually tested mice, data about group-housed mice are still lacking. The aim of this study was to find out the structure preference for softwood bedding of group-housed mice. One hundred and eight 8-week-old female mice (C57BL6/JOlaHsd and BALB/cOlaHsd) were housed in groups of three and were given one-week free access to two different bedding structures at a time. In three test combinations, softwood shaving bedding was tested versus softwood chip bedding products of three different particle sizes (fine/medium/coarse-grained). The preference test was performed in a DoubleCage system composed of two Makrolon type IIL cages, connected by a perspex tunnel. This validated system was able to detect the crossings of each individual animal with correct crossing time and direction. On the basis of these data, dwelling times on the particular bedding structures were statistically analysed as a parameter for bedding preferences. In all three test combinations, a highly significant shaving preference was detected. On average, mice spent 70% of their dwelling time on the shavings. This preference was more explicit during the light period and in C57BL/6J mice. The relative ranking of the bedding structures was: shavings≫coarse-grained chips>medium chips = fine chips. By means of these results, a shaving structure as bedding can be recommended for laboratory mice, whereas fine chip structures should be avoided.
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Reply to the letter to the Editor by Laney et al: The association between tobacco burden and “dirty chest” is unlikely to follow a linear dose-response pattern. Br J Radiol 2012. [DOI: 10.1259/bjr/70035763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Direct evidence that GM-CSF inhalation improves lung clearance in pulmonary alveolar proteinosis. Respir Med 2012; 106:284-93. [DOI: 10.1016/j.rmed.2011.10.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 10/30/2011] [Accepted: 10/31/2011] [Indexed: 11/25/2022]
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Heart failure monitoring with implantable defibrillators. ACTA ACUST UNITED AC 2012; 57 Suppl 1:/j/bmte.2012.57.issue-s1-N/bmt-2012-4256/bmt-2012-4256.xml. [DOI: 10.1515/bmt-2012-4256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hemodynamic Monitoring with an Implantable Pressure Monitor is Improved by Additional Detection of Heart Sounds. BIOMED ENG-BIOMED TE 2012. [DOI: 10.1515/bmt-2012-4358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Validation of an automatic system (DoubleCage) for detecting the location of animals during preference tests. Lab Anim 2012; 46:81-4. [DOI: 10.1258/la.2011.011072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Preference tests have often been performed for collecting information about animals' acceptance of environmental refinement objects. In numerous published studies animals were individually tested during preference experiments, as it is difficult to observe group-housed animals with an automatic system. Thus, videotaping is still the most favoured method for observing preferences of socially-housed animals. To reduce the observation workload and to be able to carry out preference testing of socially-housed animals, an automatic recording system (DoubleCage) was developed for determining the location of group-housed animals in a preference test set-up. This system is able to distinguish the transition of individual animals between two cages and to record up to 16 animals at the same time (four animals per cage). The present study evaluated the reliability of the DoubleCage system. The data recorded by the DoubleCage program and the data obtained by human observation were compared. The measurements of the DoubleCage system and manual observation of the videotapes are comparable and significantly correlated ( P < 0.0001) with good agreement. Using the DoubleCage system enables precise and reliable recording of the preferences of group-housed animals and a considerable reduction of animal observation time.
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The "dirty chest"--correlations between chest radiography, multislice CT and tobacco burden. Br J Radiol 2011; 85:339-45. [PMID: 21937617 DOI: 10.1259/bjr/62694750] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Cigarette smoking-induced airway disease commonly results in an overall increase of non-specific lung markings on chest radiography. This has been described as "dirty chest". As the morphological substrate of this condition is similar to the anthracosilicosis of coal workers, we hypothesised that it is possible to quantify the radiological changes using the International Labour Organization (ILO) classification of pneumoconiosis. The aims of this study were to evaluate whether there is a correlation between the extent of cigarette smoking and increased lung markings on chest radiography and to correlate the chest radiographic scores with findings on CT studies. METHODS In a prospective analysis a cohort of 85 smokers was examined. The cigarette consumption was evaluated in pack years (defined as 20 cigarettes per day over 1 year). Film reading was performed by two board-certified radiologists. Chest radiographs were evaluated for the presence of thickening of bronchial walls, the presence of linear or nodular opacities, and emphysema. To correlate the smoking habits with the increase of overall lung markings in chest radiography, the ILO profusion score was converted to numbers ranging from zero to nine. Chest radiographs were rated according to the complete set of standard films of the revised ILO classification. RESULTS 63/85 (74%) of the smokers showed an increase in overall lung markings on chest radiography; 32 (37%) had an ILO profusion score of <1/1, 29 (34%) had an ILO profusion score of <2/2 and 2 (2%) had an ILO score of ≥ 2/2. There was a significant positive linear correlation between the increase of overall lung markings on chest radiography and the cigarette consumption quantified as pack years (r=0.68). The majority of the heavy smokers (>40 pack years) showed emphysema; there was no significant difference between the prevalence of emphysema as diagnosed by CT (62%) or chest radiography (71%) (p<0.05).The most common findings in CT were thickening of bronchial walls (64%) and the presence of emphysema (62%) and of intralobular opacities (61%). Ground-glass opacities were seen in only 7% of our patients. CONCLUSION Bronchial wall thickening and intralobular opacities as seen in CT showed a positive linear correlation with the increase of overall lung markings on chest radiography.
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Enlarged hilar and mediastinal lymph nodes in chronic obstructive pulmonary disease. J Med Imaging Radiat Oncol 2010; 54:333-8. [PMID: 20718913 DOI: 10.1111/j.1754-9485.2010.02179.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
INTRODUCTION To evaluate the frequency of enlarged hilar or mediastinal lymph nodes in patients suffering from chronic obstructive pulmonary disease (COPD). METHODS In a retrospective study, 89 patients with proven COPD were analysed. Exclusion criteria were history of malignant disease or clinical evidence of pneumonia. Prevalence, size, and localisation of enlarged lymph nodes were assessed by multi-slice computed tomography (MSCT) and correlated with the clinical stages following the GOLD classification as well as the MSCT findings of bronchitis and emphysema. RESULTS 44/89 (49%) of our patients showed enlarged lymph nodes. Lymph node enlargement was more often seen in the mediastinum (48%) than the hilar region (20%). The most common localisation of enlarged mediastinal lymph nodes was the regional station 7 following the ATS mapping (infracarinal). Patients with a stage I following the GOLD classification showed enlarged lymph nodes in 49% (18/37), stage II in 46% (12/26), stage III in 58% (7/12) and stage IV in 50% (7/14). These findings did not differ significantly (P > 0.05). Severe airway wall thickening (42/89) was significantly more often associated with an increase of nodal enlargement (64%) (P < 0.05). CONCLUSION The present study demonstrates that enlarged hilar and mediastinal lymph nodes may occur in a rather high percentage of patients suffering from COPD, especially in those with the MSCT finding of severe bronchitis.
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Thrombopoietin expression and effects of eltrombopag in prostate, breast, lung, and ovarian solid tumors. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e21084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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The Role of T Cell Immunity in the Control of HIV Infection. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.1528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Differentiation of Functional Roles for IL-17A, IL-17F, IL-25, IL-17RA, and IL-17RB in Mouse Models of Asthma, EAE, and CIA. Clin Immunol 2010. [DOI: 10.1016/j.clim.2010.03.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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1093 Low or undetectable levels of MPL (thrombopoietin receptor gene) mRNA expression on tumour cell lines and primary tumours compared with EPOR, ERBB2, and IGF1R. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70386-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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An antibody to IP-10 is a potent antagonist of cell migration in vitro and in vivo and does not affect disease in several animal models of inflammation. Autoimmunity 2009; 42:171-82. [PMID: 19301198 DOI: 10.1080/08916930802629547] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
IP-10 secretion is induced by pro-inflammatory cytokines and mediates the migration of CXCR3+ cells. Its elevation in clinical samples has been associated with multiple inflammatory diseases and its antagonism has been reported to be effective in several animal models of inflammatory disease. We generated a mouse anti-mouse IP-10 monoclonal antibody (mAb; Clone 20A9) that specifically bound murine IP-10 with high affinity and inhibited in vitro IP-10 induced BaF3/mCXCR3 cell migration with an IC(50) of approximately 4 nM. The 20A9 mAb was completely absorbed in vivo and had dose proportional pharmacokinetic exposure with a serum half life of 2.4-6 days. The 20A9 mAb inhibited IP-10 mediated T-cell recruitment to the airways, indicating that it is effective in vivo. However, administration of the 20A9 mAb had no significant effect on disease in mouse models of delayed type hypersensitivity, collagen induced arthritis, cardiac allograft transplantation tolerance, EAE or CD4+ CD45RBHi T-cell transfer-induced IBD. These data suggest that the 20A9 mAb can antagonize IP-10 mediated chemotaxis in vitro and in vivo and that this is insufficient to cause a therapeutic benefit in multiple mouse models of inflammatory disease.
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A central nervous system-restricted isoform of the interleukin-1 receptor accessory protein modulates neuronal responses to interleukin-1. Immunity 2009; 30:817-31. [PMID: 19481478 DOI: 10.1016/j.immuni.2009.03.020] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2008] [Revised: 02/06/2009] [Accepted: 03/17/2009] [Indexed: 01/01/2023]
Abstract
Interleukin-1 (IL-1) has multiple functions in both the periphery and the central nervous system (CNS) and is regulated at many levels. We identified an isoform of the IL-1 receptor (IL-1R) accessory protein (termed AcPb) that is expressed exclusively in the CNS. AcPb interacted with IL-1 and the IL-1R but was unable to mediate canonical IL-1 responses. AcPb expression, however, modulated neuronal gene expression in response to IL-1 treatment in vitro. Animals lacking AcPb demonstrated an intact peripheral IL-1 response and developed experimental autoimmune encephalomyelitis (EAE) similarly to wild-type mice. AcPb-deficient mice were instead more vulnerable to local inflammatory challenge in the CNS and suffered enhanced neuronal degeneration as compared to AcP-deficient or wild-type mice. These findings implicate AcPb as an additional component of the highly regulated IL-1 system and suggest that it may play a role in modulating CNS responses to IL-1 and the interplay between inflammation and neuronal survival.
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P067 Eltrombopag does not enhance proliferation of non-megakaryocytic leukemia and lymphoma cell lines. Leuk Res 2009. [DOI: 10.1016/s0145-2126(09)70147-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Prophylactic or therapeutic administration of anti-GM-CSF-M250 inhibits disease in multiple experimental autoimmune models of multiple sclerosis (48.4). THE JOURNAL OF IMMUNOLOGY 2009. [DOI: 10.4049/jimmunol.182.supp.48.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
GM-CSF (granulocyte-macrophage colony stimulating factor) has been implicated in MS by virtue of its elevated expression in resident cells of the target tissue and invading pathogenic T cells, as well as the presence of cell types which require GM-CSF for differentiation and activation. Using a neutralizing antibody to GM-CSF (M250) we evaluated its role in three different EAE models of MS: C57Bl/6/MOG35-55, SJL/PLP139-151 and Adoptive Transfer-EAE (AT-EAE). A single dose of M250 on day of immunization in both the C57Bl/6/ MOG35-55 and SJL/PLP139-151 models prevented disease. Therapeutic administration of a single dose of M250 on day of disease onset reversed disease and reduced relapse in the SJL/PLP139-151 model. In the AT-EAE model, a single dose of M250 on day of cell transfer or disease onset significantly reduced mean clinical score. Histological evaluation of spinal cord tissue in the SJL/PLP139-151 model showed that therapeutic treatment with M250 resulted in a substantial reduction of the inflammatory infiltrate by 24 hours. These data indicate a role for GM-CSF in both the priming and effector phases of EAE, and suggest it may be an important target in MS.
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GPR34 is not required for mast cell degranulation induced by IgE or lysophosphatidyl-L-serine (36.1). THE JOURNAL OF IMMUNOLOGY 2009. [DOI: 10.4049/jimmunol.182.supp.36.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Mast cells play an important role in allergic inflammation. Upon activation by cross-linking of FcεRI, they rapidly release granule-associated chemical mediators and secrete cytokines, fatty acids and lipids which mediate allergic inflammation.
GPR34 is a GPCR expressed on mast cells and has been proposed to be a receptor for lysophosphatidylserine (lysoPS), a phospholipid derivative which can potentiate antigen-induced mast cell degranulation (BBRC 341: 1078, 2006). To determine if GPR34 is involved in mast cell response, we generated GPR34-/- mice and evaluated mast cell function in vitro and in vivo. Bone marrow-derived mast cells from GPR34+/+ and GPR34-/- mice exhibited similar responses, as measured by beta-hexosaminidase release, to IgE cross-linking or lysoPS stimulation. We evaluated the role of GPR34 in vivo using a passive cutaneous anaphylaxis model induced by crosslinking of FcεRI on mast cells. Mast cells in GPR34+/+ and GPR34-/- mice were activated by SC injection of anti-DNP IgE mAb followed by IV administration of DNP-BSA and Evans blue dye 24 hours later. Activation resulted in vascular permeability which was measured as the amount of dye influx. In this model, the mast cell response was unaffected by GPR34 gene deficiency.
Together, our results indicate that GPR34 is not required for the mast cell response to IgE crosslinking in vitro or in vivo and that GPR34 is not a receptor for lysoPS.
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Moving beyond heterogeneity and process complexity: A new vision for watershed hydrology. WATER RESOURCES RESEARCH 2007. [PMID: 0 DOI: 10.1029/2006wr005467] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
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Abstract
Spontaneous renal rupture is a rare but nevertheless life-threatening complication in cases of benign and malignant space-occupying lesions in the kidneys. A precise preoperative differentiation often turns out to be difficult because of the formation of a hematoma. We report on a 50-year-old female patient with a retroperitoneal hematoma due to a spontaneous renal rupture for which an angiomyolipoma could only by diagnosed after the nephrectomy with histological work-up. In search of the cause, sonography, abdominal computed tomography, and digital subtraction angiography were conducted, which could provide findings suggestive of a space-occupying lesion, but because of the distinct hemorrhagic infarction could not determine whether it was benign or malignant. As shown in this case, when the radiological result is ambiguous, renal exposure is indicated from both a diagnostic and therapeutic standpoint.
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