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Peters J, Timme-Bronsert S, Voll RE, Finzel S. [Salivary gland ultrasound or biopsy? : Comparison of methods based on case examples]. Z Rheumatol 2023; 82:654-665. [PMID: 37782326 PMCID: PMC10570188 DOI: 10.1007/s00393-023-01416-4] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2023] [Indexed: 10/03/2023]
Abstract
BACKGROUND Ultrasound examination of the salivary glands (SG) is a quick and noninvasive method to detect and semiquantitatively estimate typical changes in the large SG in Sjögren's syndrome (SS). The differential diagnosis of SS is difficult because several diseases and adverse effects of treatment have a similar clinical picture as SS with sicca syndrome and can even induce alterations in the SG (mimic diseases). Hence, for a long time an SG biopsy was regarded as the diagnostic procedure of choice, especially in SS‑A negative patients, whereas the significance of SD sonography is still controversially discussed. OBJECTIVE Comparison of typical and atypical changes for SS in the salivary glands in ultrasound and associated histological sections. MATERIAL AND METHODS This article describes six patient cases with antibody positive or negative SS with and without typical SS ultrasound patterns, SS-associated lymphoma, sarcoidosis and IgG4-associated disease. The findings of the sonographic examination of the parotid glands and the associated histology of the SD are explained and put into context. RESULTS The SSA antibody positive patients with SS show a typical sonographic pattern with hypoechoic foci, especially if the disease has been present for a long time. This pattern can help support the diagnosis of SS. The ultrasound patterns of the mimic diseases sometimes differ significantly from the typical patterns of pSS. The histological examination of the SG helps to corroborate the diagnosis but low histological focus scores, in particular, require a critical synopsis of the clinical, serological and imaging findings. CONCLUSION Both salivary gland ultrasound and the histological examination of SG biopsies are justified in the diagnostics and differential diagnosis of SS and sicca syndrome.
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Affiliation(s)
- J Peters
- Institut für Klinische Pathologie, Universitätsklinikum Freiburg und Medizinische Fakultät, Universität Freiburg, Hugstetter Str. 55, 79106, Freiburg, Deutschland
| | - S Timme-Bronsert
- Institut für Klinische Pathologie, Universitätsklinikum Freiburg und Medizinische Fakultät, Universität Freiburg, Hugstetter Str. 55, 79106, Freiburg, Deutschland
| | - R E Voll
- Klinik für Rheumatologie und Klinische Immunologie, Universitätsklinikum Freiburg und Medizinische Fakultät, Freiburg, Deutschland
| | - S Finzel
- Klinik für Rheumatologie und Klinische Immunologie, Universitätsklinikum Freiburg und Medizinische Fakultät, Freiburg, Deutschland.
- Klinik für Rheumatologie und klinische Immunologie, Universitätsklinikum Freiburg, Hugstetter Str. 55, 79106, Freiburg, Deutschland.
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Pizzuti A, Gulban O, Huber L, Peters J, Goebel R. FV 6 Neural correlates of human motion perception at mesoscale: An fMRI study at 7 Tesla. Clin Neurophysiol 2023. [DOI: 10.1016/j.clinph.2023.02.007] [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: 03/08/2023]
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Mulholland C, Soliman C, Furrer MA, Sathianathen N, Corcoran NM, Schramm B, Mertens E, Peters J, Costello A, Lawrentschuk N, Dundee P, Thomas B. Same day discharge for robot-assisted radical prostatectomy: a prospective cohort study documenting an Australian approach. ANZ J Surg 2023; 93:669-674. [PMID: 36637213 DOI: 10.1111/ans.18198] [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: 03/16/2022] [Revised: 11/28/2022] [Accepted: 11/29/2022] [Indexed: 01/14/2023]
Abstract
BACKGROUND The introduction of robotic surgical systems has significantly impacted urological surgery, arguably more so than other surgical disciplines. The focus of our study was length of hospital stay - patients have traditionally been discharged day 1 post-robot-assisted radical prostatectomy (RARP), however, during the ongoing COVID-19 pandemic and consequential resource limitations, our centre has facilitated a cohort of same-day discharges with initial success. METHODS We conducted a prospective tertiary single-centre cohort study of a series of all patients (n = 28) - undergoing RARP between January and April 2021. All patients were considered for a day zero discharge pathway which consisted of strict inclusion criteria. At follow-up, each patient's perspective on their experience was assessed using a validated post-operative satisfaction questionnaire. Data were reviewed retrospectively for all those undergoing RARP over the study period, with day zero patients compared to overnight patients. RESULTS Overall, 28 patients 20 (71%) fulfilled the objective criteria for day zero discharge. Eleven patients (55%) agreed pre-operatively to day zero discharge and all were successfully discharged on the same day as their procedure. There was no statistically significant difference in age, BMI, ASA, Charlson score or disease volume. All patients indicated a high level of satisfaction with their procedure. Median time from completion of surgery to discharge was 426 min (7.1 h) in the day zero discharge cohort. CONCLUSION Day zero discharge for RARP appears to deliver high satisfaction, oncological and safety outcomes. Therefore, our study demonstrates early success with unsupported same-day discharge in carefully selected and pre-counselled patients.
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Affiliation(s)
- Clancy Mulholland
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Christopher Soliman
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Marc A Furrer
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Urology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of Surgery, Royal Melbourne Hospital, University of Melbourne, The Australian Medical Robotics Academy, Melbourne, Victoria, Australia
| | | | - Niall M Corcoran
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Surgery, University of Melbourne, Parkville, Victoria, Australia
| | - Belinda Schramm
- Department of Anaesthesia, Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Evie Mertens
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Justin Peters
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Surgery, Royal Melbourne Hospital, University of Melbourne, The Australian Medical Robotics Academy, Melbourne, Victoria, Australia
- Department of Surgery, University of Melbourne, Parkville, Victoria, Australia
| | - Anthony Costello
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Surgery, Royal Melbourne Hospital, University of Melbourne, The Australian Medical Robotics Academy, Melbourne, Victoria, Australia
- Department of Surgery, University of Melbourne, Parkville, Victoria, Australia
| | - Nathan Lawrentschuk
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Surgery, University of Melbourne, Parkville, Victoria, Australia
| | - Philip Dundee
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Surgery, Royal Melbourne Hospital, University of Melbourne, The Australian Medical Robotics Academy, Melbourne, Victoria, Australia
- Department of Surgery, University of Melbourne, Parkville, Victoria, Australia
| | - Benjamin Thomas
- Department of Urology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Surgery, Royal Melbourne Hospital, University of Melbourne, The Australian Medical Robotics Academy, Melbourne, Victoria, Australia
- Department of Surgery, University of Melbourne, Parkville, Victoria, Australia
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Besse B, Awad M, Forde P, Thomas M, Goss G, Aronson B, Hobson R, Dean E, Peters J, Iyer S, Conway J, Barrett J, Cosaert J, Dressman M, Barry S, Heymach J. OA15.05 HUDSON: An Open-Label, Multi-Drug, Biomarker-Directed Phase 2 Study in NSCLC Patients Who Progressed on Anti-PD-(L)1 Therapy. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.074] [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: 11/30/2022]
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Dundee P, Furrer MA, Corcoran NM, Peters J, Pan H, Ballok Z, Ryan A, Guerrieri M, Costello AJ. Defining Prostatic Vascular Pedicle Recurrence and the Anatomy of Local Recurrence of Prostate Cancer on Prostate-specific Membrane Antigen Positron Emission Tomography/Computed Tomography. EUR UROL SUPPL 2022; 41:116-122. [PMID: 35813255 PMCID: PMC9257633 DOI: 10.1016/j.euros.2022.05.011] [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] [Accepted: 05/19/2022] [Indexed: 11/30/2022] Open
Abstract
Background The term local recurrence in prostate cancer is considered to mean persistent local disease in the prostatic bed, most commonly at the site of the vesicourethral anastomosis (VUA). Since the introduction of prostate-specific membrane antigen (PSMA) positron emission tomography/computed tomography (PET/CT) and magnetic resonance imaging for assessment of early biochemical recurrence (BCR), we have found histologically confirmed prostate cancer in the prostatic vascular pedicle (PVP). If a significant proportion of local recurrences are distant to the VUA, it may be possible to alter adjuvant and salvage radiation fields in order to reduce the potential morbidity of radiation in selected patients. Objective To describe PVP local recurrence and to map the anatomic pattern of prostate bed recurrence on PSMA PET/CT. Design, setting, and participants This was a retrospective multicentre study of 185 patients imaged with PSMA PET/CT following radical prostatectomy (RP) between January 2016 and November 2018. All patient data and clinical outcomes were prospectively collected. Recurrences were documented according to anatomic location. For patients presenting with local recurrence, the precise location of the recurrence within the prostate bed was documented. Intervention PSMA PET/CT for BCR following RP. Results and limitations A total of 43 local recurrences in 41/185 patients (22%) were identified. Tumour recurrence at the PVP was found in 26 (63%), VUA in 15 (37%), and within a retained seminal vesicle and along the anterior rectal wall in the region of the neurovascular bundle in one (2.4%) each. Histological and surgical evidence of PVP recurrence was acquired in two patients. The study is limited by its retrospective nature with inherent selection bias. This is an observational study reporting on the anatomy of local recurrence and does not include follow-up for patient outcomes. Conclusions Our study showed that prostate cancer can recur in the PVP and is distant to the VUA more commonly than previously thought. This may have implications for RP technique and for the treatment of selected patients in the local recurrence setting. Patient summary We investigated more precise identification of the location of tumour recurrence after removal of the prostate for prostate cancer. We describe a new definition of local recurrence in an area called the prostatic vascular pedicle. This new concept may alter the treatment recommended for recurrent disease.
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Affiliation(s)
- Philip Dundee
- Department of Urology, The University of Melbourne, Royal Melbourne Hospital, Grattan Street Parkville, Australia 3052
- The Australian Medical Robotics Academy, North Melbourne, Australia
- Australian Prostate Cancer Centre, North Melbourne, Australia
- Epworth Healthcare, Melbourne, Australia
- Corresponding author. Department of Urology, Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia. Tel. +61 3 9342 7294.
| | - Marc A. Furrer
- Department of Urology, The University of Melbourne, Royal Melbourne Hospital, Grattan Street Parkville, Australia 3052
- The Australian Medical Robotics Academy, North Melbourne, Australia
- Epworth Healthcare, Melbourne, Australia
- Department of Urology, University Hospital of Bern, University of Bern, Bern, Switzerland
| | - Niall M. Corcoran
- Department of Urology, The University of Melbourne, Royal Melbourne Hospital, Grattan Street Parkville, Australia 3052
- Australian Prostate Cancer Centre, North Melbourne, Australia
| | - Justin Peters
- Department of Urology, The University of Melbourne, Royal Melbourne Hospital, Grattan Street Parkville, Australia 3052
- The Australian Medical Robotics Academy, North Melbourne, Australia
- Australian Prostate Cancer Centre, North Melbourne, Australia
- Epworth Healthcare, Melbourne, Australia
| | - Henry Pan
- Department of Urology, University Hospital of Bern, University of Bern, Bern, Switzerland
| | | | - Andrew Ryan
- Healthcare Imaging Services, Melbourne, Australia
| | | | - Anthony J. Costello
- Department of Urology, The University of Melbourne, Royal Melbourne Hospital, Grattan Street Parkville, Australia 3052
- The Australian Medical Robotics Academy, North Melbourne, Australia
- Australian Prostate Cancer Centre, North Melbourne, Australia
- Epworth Healthcare, Melbourne, Australia
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Hoi A, Toor S, Monk J, Chang J, Koelmeyer R, Papadaki A, Peters J, Vincent F, Ooi J, Morand EF. POS0774 ANTI-Sm AUTOANTIBODIES IDENTIFY A PHENOTYPE OF SEVERE SLE WITH AN ASSOCIATED SERUM BIOMARKER PROFILE. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundAntibodies to Smith (Sm) have been described as one of the most specific autoantibodies for systemic lupus erythematosus (SLE). Other than its association with lupus nephritis, there is, however, limited understanding of its clinical significance1,2.ObjectivesTo describe clinical associations and serum protein profiles of anti-Sm positivity in SLE.MethodsPatients fulfilling SLE classification criteria who were followed longitudinally in a prospective multicentre cohort were studied according to their baseline anti-Sm antibody status. Comparison between Sm+ and Sm- patients was made using descriptive statistics. Clinical associations of Sm positivity with patient disease characteristics were studied using logistic regression. In a subset, 211 serum analytes were measured using Quantibody, Luminex and ELISA assays. Associations between serum proteins and Sm positivity were studied using Least Absolute Shrinkage and Selection Operator (LASSO) penalised regression, adjusting for demographics (age, sex, ethnicity) and medication useResults383 patients were studied with median (IQR) follow-up of 4.9 (2,9) years; 65 (17%) had positive anti-Sm antibodies. Sm+ patients were significantly more likely to be of non-European ancestry (OR 2.73, 95% CI 1.55-4.82, p<0.001), and to be positive for anti-dsDNA antibodies (OR 2.8, 95% CI 2.3-3.4, p<0.001), anti-RNP antibodies (OR 15.7, 95% CI 13.9-17.8, p<0.001), direct anti-globulin test (OR 2.36, 95% CI 2.07-2.7, p<0.001) and hypocomplementemia (OR 7.73, 95% CI 5.1-11.7, p<0.001). Sm+ patients were significantly more likely to have active disease during the observation period in a range of organ domains, including mucocutaneous, renal, vasculitis and fever.More Sm+ patients had episodes of High Disease Activity Status (HDAS, SLEDAI-2K ≧10)3 (OR 3.07, 95% CI 1.70-5.54, p<0.001) and persistent active disease (time-adjusted mean SLEDAI-2K > 4) (OR 3.23. 95% CI 1.84-5.70, p<0.001). Conversely, fewer Sm+ patients attained LLDAS for ≥50% observed time (19.7% vs 41.8%, p=0.002). Sm+ patients were more likely to be treated with glucocorticoids, immunosuppressants, and rituximab. There was no significant difference in damage accrual between Sm + and Sm - patients.In serum protein analysis (n=197, 29 Sm+), LASSO modelling retained 3 proteins associated with Sm+ status, CXCL13, IL1RL1 and FLT1, along with Asian ethnicity and age. In analysis including pairwise interaction between predictors, 28 Sm+ associated proteins were identified, including CCL4, VCAM1, IL1RL1, Fcg R IIB/C, TDGF1, CEACAM1, TIMP1, BMP5, GDF15, and TNFRSF17.ConclusionAnti-Sm autoantibodies, present in 17% of SLE patients, were strongly associated with classical disease manifestations, more severe disease activity, and a specific serological and proteomic profile. These findings suggest anti-Sm+ SLE as a specific disease subset.References[1]Barada, FA., B.S. Andrews, J.S. Davis, R.P. Taylor, Antibodies to Sm in patients with systemic lupus erythematosus. Correlation of Sm antibody titers with disease activity and other laboratory parameters. Arthritis Rheum, 1981. 24:1236-1244[2]Arroyo-Avilla, M, Y. Santiago-Casas, G.McGwin, R.S. Cantor, M. Petri, R. Ramsey-Goldman, J.D. Reveille, R.P.Kimberly, G.S. Alarcon, L.M.Vila, E.E. Brown. Clinical Associations of anti-Smith antibodies in PROFILE: a multi-ethnic lupus cohort. 2015. 34:1217-1223[3]Koelmeyer, R., H.T. Nim, M. Nikpour, Y.B. Sun, A. Kao, O. Guenther, E. Morand, and A. Hoi, High disease activity status suggests more severe disease and damage accrual in systemic lupus erythematosus. Lupus Sci Med, 2020. 7(1).AcknowledgementsI would like to acknowledge participants and clinicians involved with the Australian Lupus Registry & BiobankDisclosure of InterestsNone declared
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Nuehring C, Peters J. Identification and Stratification of Cultured Microorganisms from Wind Cave. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.0r236] [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]
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Kaivers J, Peters J, Rautenberg C, Schroeder T, Kobbe G, Hildebrandt B, Haas R, Germing U, Bennett JM. The WHO 2016 diagnostic criteria for Acute Myeloid leukemia with myelodysplasia related changes (AML-MRC) produce a very heterogeneous entity: A retrospective analysis of the FAB subtype RAEB-T. Leuk Res 2021; 112:106757. [PMID: 34864369 DOI: 10.1016/j.leukres.2021.106757] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 10/19/2022]
Abstract
We studied 79 patients with AML-MRC or RAEB-T, who were later reclassified according to the WHO classification. Marrow slides were examined cytomorphologically with regard to dysplasia. Patients were followed up until March 2020. Thirty-one patients underwent allogeneic stem cell transplantation (median survival (ms) 16 months), 14 were treated with induction chemotherapy (ms 8.4 months), 18 received hypomethylating agents (ms 9.2 months), 16 received low dose chemotherapy or best supportive care (ms 2.4 months). Only 30.4 % fulfilled the morphologic WHO criteria. 46.8 % were classified as AML-MRC by an antecedent MDS, 54.4 % of the pts were classified by MDS-related chromosomal abnormalities. 5 % did not fulfill any of the criteria and were entered based on 20-29 % medullary blasts. There was no difference in ms between pts presenting with > 50 % dysplasia as compared to pts with dysplasia between 10 % and 50 % (ms 9.1 vs 9.9 months, p = n.s.) or for pts with antecedent MDS (ms 9.1 vs 8.9 months, p = n.s.). Myelodysplasia-related cytogenetic abnormalities were associated with a worse outcome (ms 8.1 vs 13.5 months, p = 0.026). AML-MRC in its current definition is a heterogenous entity. Dysplasia of ≥ 50 % in ≥ two lineages is not helpful for diagnostics and prognostication and therefore should be deleted in future classifications. We recommend utilizing the WHO guidelines for defining dysplasia (10 % or greater in ≥ 1 of the three myeloid cell lines) assisting in establishing the diagnosis of MDS.
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Affiliation(s)
- J Kaivers
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany.
| | - J Peters
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany
| | - C Rautenberg
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany; Department of Hematology and Stem Cell Transplantation, University Hospital Essen, Medical Faculty, University Duisburg-Essen, Essen, Germany
| | - T Schroeder
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany; Department of Hematology and Stem Cell Transplantation, University Hospital Essen, Medical Faculty, University Duisburg-Essen, Essen, Germany
| | - G Kobbe
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany
| | - B Hildebrandt
- Institute of Human Genetics, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany
| | - R Haas
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany
| | - U Germing
- Department of Hematology, Oncology and Clinical Immunology, Medical Faculty, University of Duesseldorf, Duesseldorf, Germany
| | - J M Bennett
- Department of Pathology, Hematopathology Unit and James P Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, USA
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Liveringhouse C, Robinson T, Garcia G, Peters J, Kim S, Latifi K. Dosimetric Comparison of Volumetric Modulated Arc Therapy with Tomotherapy Based Total Body Irradiation for Patients Undergoing Conditioning Prior to Hematopoietic Stem Cell Transplantation for Acute Lymphocytic Leukemia. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wolanin J, Michel L, Tabacchioni D, Zanotti JM, Peters J, Imaz I, Coasne B, Plazanet M, Picard C. Heterogeneous Microscopic Dynamics of Intruded Water in a Superhydrophobic Nanoconfinement: Neutron Scattering and Molecular Modeling. J Phys Chem B 2021; 125:10392-10399. [PMID: 34492185 DOI: 10.1021/acs.jpcb.1c06791] [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: 11/28/2022]
Abstract
With their strong confining porosity and versatile surface chemistry, zeolitic imidazolate frameworks-including the prototypical ZIF-8-display exceptional properties for various applications. In particular, the forced intrusion of water at high pressure (∼25 MPa) into ZIF-8 nanopores is of interest for energy storage. Such a system reveals also ideal to study experimentally water dynamics and thermodynamics in an ultrahydrophobic confinement. Here, we report on neutron scattering experiments to probe the molecular dynamics of water within ZIF-8 nanopores under high pressure up to 38 MPa. In addition to an overall confinement-induced slowing down, we provide evidence for strong dynamical heterogeneities with different underlying molecular dynamics. Using complementary molecular simulations, these heterogeneities are found to correspond to different microscopic mechanisms inherent to vicinal molecules located in strongly adsorbing sites (ligands) and other molecules nanoconfined in the cavity center. These findings unveil a complex microscopic dynamics, which results from the combination of surface residence times and exchanges between the cavity surface and center.
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Affiliation(s)
- J Wolanin
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - L Michel
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - D Tabacchioni
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - J M Zanotti
- Laboratoire Léon Brillouin, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - J Peters
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France.,Institut Laue Langevin, 38042 Grenoble, France
| | - I Imaz
- Catalan Insitute of Nanoscience and Nanotechnology, 08193 Barcelona, Spain
| | - B Coasne
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - M Plazanet
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - C Picard
- Univ. Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
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Zaccaria J, Lent D, Peters J. Einseitige Mikrophthalmie bei einem 4 Monate alten Säugling. Monatsschr Kinderheilkd 2021. [DOI: 10.1007/s00112-020-01101-9] [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]
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Mangiola S, McCoy P, Modrak M, Souza-Fonseca-Guimaraes F, Blashki D, Stuchbery R, Keam SP, Kerger M, Chow K, Nasa C, Le Page M, Lister N, Monard S, Peters J, Dundee P, Williams SG, Costello AJ, Neeson PJ, Pal B, Huntington ND, Corcoran NM, Papenfuss AT, Hovens CM. Transcriptome sequencing and multi-plex imaging of prostate cancer microenvironment reveals a dominant role for monocytic cells in progression. BMC Cancer 2021; 21:846. [PMID: 34294073 PMCID: PMC8296706 DOI: 10.1186/s12885-021-08529-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 06/23/2021] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Prostate cancer is caused by genomic aberrations in normal epithelial cells, however clinical translation of findings from analyses of cancer cells alone has been very limited. A deeper understanding of the tumour microenvironment is needed to identify the key drivers of disease progression and reveal novel therapeutic opportunities. RESULTS In this study, the experimental enrichment of selected cell-types, the development of a Bayesian inference model for continuous differential transcript abundance, and multiplex immunohistochemistry permitted us to define the transcriptional landscape of the prostate cancer microenvironment along the disease progression axis. An important role of monocytes and macrophages in prostate cancer progression and disease recurrence was uncovered, supported by both transcriptional landscape findings and by differential tissue composition analyses. These findings were corroborated and validated by spatial analyses at the single-cell level using multiplex immunohistochemistry. CONCLUSIONS This study advances our knowledge concerning the role of monocyte-derived recruitment in primary prostate cancer, and supports their key role in disease progression, patient survival and prostate microenvironment immune modulation.
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Affiliation(s)
- Stefano Mangiola
- Bioinformatics Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia
| | - Patrick McCoy
- Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Martin Modrak
- Institute of Microbiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Fernando Souza-Fonseca-Guimaraes
- University of Queensland Diamantina Institute, Translational Research Institute, University of Queensland, Brisbane, QLD, Australia
| | - Daniel Blashki
- The Peter Doherty Institute for Infection and Immunity, Parkville, Victoria, Australia
| | - Ryan Stuchbery
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Simon P Keam
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
- Peter MacCallum Cancer Centre, Melbourne, VIC, 3000, Australia
| | - Michael Kerger
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Ken Chow
- Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Chayanica Nasa
- Flow Cytometry Facility, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Melanie Le Page
- Flow Cytometry Facility, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Natalie Lister
- Cancer Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - Simon Monard
- Flow Cytometry Facility, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Justin Peters
- Epworth Center of Cancer Research, Clayton, Victoria, Australia
| | - Phil Dundee
- Epworth Center of Cancer Research, Clayton, Victoria, Australia
| | - Scott G Williams
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
- Peter MacCallum Cancer Centre, Melbourne, VIC, 3000, Australia
| | - Anthony J Costello
- Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Paul J Neeson
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
- Peter MacCallum Cancer Centre, Melbourne, VIC, 3000, Australia
| | - Bhupinder Pal
- The Olivia Newton-John Cancer Research Institute, Heidelberg, Melbourne, Australia
| | - Nicholas D Huntington
- Cancer Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - Niall M Corcoran
- Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
- Department of Urology, Frankston Hospital, Frankston, Victoria, Australia
| | - Anthony T Papenfuss
- Bioinformatics Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
- Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia.
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia.
- Peter MacCallum Cancer Centre, Melbourne, VIC, 3000, Australia.
- School of Mathematics and Statistics, University of Melbourne, Melbourne, VIC, 3010, Australia.
| | - Christopher M Hovens
- Department of Surgery, The University of Melbourne, Parkville, Victoria, Australia
- Department of Urology, Royal Melbourne Hospital, Parkville, Victoria, Australia
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Tay JYI, Chow K, Gavin DJ, Mertens E, Howard N, Thomas B, Dundee P, Peters J, Simkin P, Kranz S, Finlay M, Heinze S, Kelly B, Costello A, Corcoran N. The utility of magnetic resonance imaging in prostate cancer diagnosis in the Australian setting. BJUI Compass 2021; 2:377-384. [PMID: 35474704 PMCID: PMC8988779 DOI: 10.1002/bco2.99] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 11/23/2022] Open
Abstract
Objectives To investigate the utility of Magnetic Resonance Imaging (MRI) for prostate cancer diagnosis in the Australian setting. Patients and methods All consecutive men who underwent a prostate biopsy (transperineal or transrectal) at Royal Melbourne Hospital between July 2017 to June 2019 were included, totalling 332 patients. Data were retrospectively collected from patient records. For each individual patient, the risk of prostate cancer diagnosis at biopsy based on clinical findings was determined using the European Randomized study of Screening for Prostate Cancer (ERSPC) risk calculator, with and without incorporation of MRI findings. Results MRI has good diagnostic accuracy for clinically significant prostate cancer. A PI‐RADS 2 or lower finding has a negative predictive value of 96% for clinically significant cancer, and a PI‐RADS 3, 4 or 5 MRI scan has a sensitivity of 93%. However, MRI has a false negative rate of 6.5% overall for clinically significant prostate cancers. Pre‐ biopsy MRI may reduce the number of unnecessary biopsies, as up to 50.0% of negative or ISUP1 biopsies have MRI PI‐RADS 2 or lower. Incorporation of MRI findings into the ERSPC calculator improved predictive performance for all prostate cancer diagnoses (AUC 0.77 vs 0.71, P = .04), but not for clinically significant cancer (AUC 0.89 vs 0.87, P = .37). Conclusion MRI has good sensitivity and negative predictive value for clinically significant prostate cancers. It is useful as a pre‐biopsy tool and can be used to significantly reduce the number of unnecessary prostate biopsies. However, MRI does not significantly improve risk predictions for clinically significant cancers when incorporated into the ERSPC risk calculator.
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Affiliation(s)
- Jia Ying Isaac Tay
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Ken Chow
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Dominic J. Gavin
- Department of Surgery The Royal Melbourne Hospital Melbourne VIC Australia
| | - Evie Mertens
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Nicholas Howard
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Benjamin Thomas
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Philip Dundee
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Justin Peters
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Paul Simkin
- Department of Radiology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Sevastjan Kranz
- Department of Pathology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Moira Finlay
- Department of Pathology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Stefan Heinze
- Department of Radiology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Brian Kelly
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Anthony Costello
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
| | - Niall Corcoran
- Department of Urology The Royal Melbourne Hospital Melbourne VIC Australia
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14
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Warming A, Peters J. Optimizing DNA Extraction from Cave Microorganisms. FASEB J 2021. [DOI: 10.1096/fasebj.2021.35.s1.02063] [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)
| | - Justin Peters
- Department of Chemistry and BiochemistryUniversity of Northern IowaCedar FallsIA
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Wiehler A, Chakroun K, Peters J. Attenuated Directed Exploration during Reinforcement Learning in Gambling Disorder. J Neurosci 2021; 41:2512-2522. [PMID: 33531415 PMCID: PMC7984586 DOI: 10.1523/jneurosci.1607-20.2021] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 06/26/2020] [Revised: 01/18/2021] [Accepted: 01/22/2021] [Indexed: 12/30/2022] Open
Abstract
Gambling disorder (GD) is a behavioral addiction associated with impairments in value-based decision-making and behavioral flexibility and might be linked to changes in the dopamine system. Maximizing long-term rewards requires a flexible trade-off between the exploitation of known options and the exploration of novel options for information gain. This exploration-exploitation trade-off is thought to depend on dopamine neurotransmission. We hypothesized that human gamblers would show a reduction in directed (uncertainty-based) exploration, accompanied by changes in brain activity in a fronto-parietal exploration-related network. Twenty-three frequent, non-treatment seeking gamblers and twenty-three healthy matched controls (all male) performed a four-armed bandit task during functional magnetic resonance imaging (fMRI). Computational modeling using hierarchical Bayesian parameter estimation revealed signatures of directed exploration, random exploration, and perseveration in both groups. Gamblers showed a reduction in directed exploration, whereas random exploration and perseveration were similar between groups. Neuroimaging revealed no evidence for group differences in neural representations of basic task variables (expected value, prediction errors). Our hypothesis of reduced frontal pole (FP) recruitment in gamblers was not supported. Exploratory analyses showed that during directed exploration, gamblers showed reduced parietal cortex and substantia-nigra/ventral-tegmental-area activity. Cross-validated classification analyses revealed that connectivity in an exploration-related network was predictive of group status, suggesting that connectivity patterns might be more predictive of problem gambling than univariate effects. Findings reveal specific reductions of strategic exploration in gamblers that might be linked to altered processing in a fronto-parietal network and/or changes in dopamine neurotransmission implicated in GD.SIGNIFICANCE STATEMENT Wiehler et al. (2021) report that gamblers rely less on the strategic exploration of unknown, but potentially better rewards during reward learning. This is reflected in a related network of brain activity. Parameters of this network can be used to predict the presence of problem gambling behavior in participants.
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Affiliation(s)
- A Wiehler
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
- Université de Paris, Paris F-75006, France
- Department of Psychiatry, Service Hospitalo-Universitaire, Groupe Hospitalier Universitaire Paris Psychiatrie & Neurosciences, Paris F-75014, France
| | - K Chakroun
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - J Peters
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
- Department of Psychology, Biological Psychology, University of Cologne, Cologne 50923, Germany
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Chow* K, Ryan A, Agarwal D, Bolton D, Chan Y, Dundee P, Frydenberg M, Furrer M, Goad J, Gyomber D, Hanegbi U, Harewood L, King D, Lawrentschuk N, Lamb A, Liodakis P, Moon D, Murphy D, Peters J, Ruljancich P, Verrill C, Webb D, Wong LM, Zargar H, Costello A, Hovens C, Corcoran N. MP64-09 DUCTAL ADENOCARCINOMA OF THE PROSTATE IS ASSOCIATED WITH SHORTER METASTASIS-FREE SURVIVAL. J Urol 2020. [DOI: 10.1097/ju.0000000000000939.09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Stein A, Peers E, Hattersley J, Harris K, Feehally J, Walls J, Brown C, Nichols N, Mistry C, Ashman R, Raftery M, Peters J, Gokal R. Clinical Experience with Icodextrin in Continuous Ambulatory Peritoneal Dialysis Patients. Perit Dial Int 2020. [DOI: 10.1177/089686089401402s08] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objectives To review the clinical experience in the United Kingdom with icodextrin (Ic). Design A retrospective multicenter study. Patients (1) the MICAS 1 patients who received Ic and elected to continue using it (called MICAS 2 patients), and (2) patients started on Ic on a named-patient basis (called compassionate use patients). Nearly all this latter group had ultrafiltration (UF) failure and were approaching hemodialysis (HC). Interventions The institution of one Ic bag, as the overnight exchange, usually in addition to three glucose bags. Results (1) MICAS 2: Of the 67 patients who received Ic and completed MICAS 1, 48 (72%) patients from eight units in the United Kingdom wished to continue Ic. Forty two percent of MICAS 2 patients were well on Ic after approximately 30 months of study (including the 6 months on MICAS 1). The main reasons for withdrawal were transplantation (21 %), death (17%), or transfer to HC for reasons other than UF failure (10%). There were no significant changes in laboratory data, including hematology, simple biochemistry, bone biochemistry, liver function tests, serum osmolality, and maltose levels. The adverse events reported were incidental to Ic. (2) Compassionate use: 30/63 (48%) patients remain well on Ic after 10 months of study. Eight patients (12%) went on to experience UF failure (again) after 13 months on Ic, requiring transfer to HC. The other main outcomes were death (11 %), transplantation (11 %), or transfer to HC for reasons unrelated to Ic (16%), usually intractable peritonitis. The serum sodium concentration decreased from 136.6±3.8 to 134.4±4.2 mmol/L (p < 0.05). There were no other significant changes in hematology or biochemistry measurements. Conclusion In MICAS 2 Ic probably maintained its effects, since there were no withdrawals due to UF failure. The compassionate use program has shown that a single Ic exchange is useful in UF failure, being able to prevent or delay transfer to hemodialysis. In both studies the safety and efficacy of Ic has been demonstrated in a large group of patients. A total of 192 patient-years of experience (including MICAS 1) has been accumulated to date. Properly controlled studies are needed to determine whether Ic, in its present form, should remain a “special needs” product (for UF failure) or whether it could replace glucose as the treatment of choice for CAPC patients.
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Affiliation(s)
- Andrew Stein
- Department of Nephrology, Leicester General Hospital, Leicester,. ML Laboratories, U. K
| | - Elizabeth Peers
- Department of Nephrology, Leicester General Hospital, Leicester,. ML Laboratories, U. K
| | - Jane Hattersley
- Department of Nephrology, Leicester General Hospital, Leicester,. ML Laboratories, U. K
| | - Kevin Harris
- Department of Nephrology, Leicester General Hospital, Leicester,. ML Laboratories, U. K
| | - John Feehally
- Department of Nephrology, Leicester General Hospital, Leicester,. ML Laboratories, U. K
| | - John Walls
- Department of Nephrology, Leicester General Hospital, Leicester,. ML Laboratories, U. K
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Gokal R, Mistry CD, Peers E, Brown C, Smith S, Edwards D, Junor B, Gordon A, McMillan M, Robertson M, Michael J, McKain J, Raftery M, Peters J, Clutterbuck E, Clemenger M, Walls J, Orton C, Goodship T, Grieves J, Dharmasena D, Hourhane G, Howarth D, Boyes R, Clisby L, Beran Y. A United Kingdom Multicenter Study of Icodextrin in Continuous Ambulatory Peritoneal Dialysis. Perit Dial Int 2020. [DOI: 10.1177/089686089401402s03] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
While glucose remains the only osmotic agent used universally for peritoneal dialysis, its various shortcomings for the long dwell equilibration continuous ambulatory peritoneal dialysis (CAPD) has led to a search for alternative agents. The large molecular weight group has been of interest, because these agents theoretically would lead to greater ultrafiltration and a better metabolic profile. Mostsubstances (dextrans, charged macromolecules) have been found unsuitable for reasons of insolubility, allergenicity, and peritoneal toxicity. Short-chain polypeptides have been studied in humans, but the experience is limited, and there is the potential for allergenicity with long-term use. The only large molecular weight agent that has been studied in some detail but hitherto in one center only and in a limited number of patients is glucose polymer (generic name, icodextrin). Because of the promise shown by these initial studies, a randomized controlled multicenter investigation of icodextrin in CAPD (MIDAS Study Group) was undertaken to evaluate the long-term safety and efficacy by comparing daily overnight (8 12 hours) use of a slightly hypo-osmolar solution (282 mOsm/ kg) with 1.36% (346 mOsm/kg) and 3.86% (484 mOsm/kg) glucose exchanges. Over a 6-month period 209 patients from 11 centers in the United Kingdom were randomized, with 106 allocated to receive icodextrin (study group) and 103 to remain on glucose (control group). One hundred and thirty-eight patients completed the 6-month study (71 control, 67 study). The mean net ultrafiltration overnight with icodextrin was 3.5 times greater than 1.36% at 8 hours and 5.5 times greater at 12 hours (p<0.0001), but no different from that of 3.86% glucose at 8 and 12 hours (although for the latter dwell the net mean ultrafiltration volume was greater by about 140 mL). Biochemical profiles were no different except for a small fall in serum sodium and chloride in the icodextrin group. The mean serum maltose rose to a steady-state level of 1.2 g/L within 2 weeks and remained stable. The mean carbohydrate absorbed for icodextrin (29±5 g) was lower than with 3.86% glucose (62±5 g). The use of icodextrin did not increase the incidence of peritonitis, nor did it alter its outcome, affect uptake of icodextrin from the peritoneum, alter serum osmolality or sodium levels. There were no adverse effects associated with the use of icodextrin, and the overall CAPD-related symptom score was significantly better for icodextrin than control subjects. This study and subsequent extensive use and clinical experience has demonstrated that the daily use of an iso-osmolar icodextrin solution is generally well tolerated, effective, and could replace the overnight use of hyperosmotic glucose solution. Its use was of equal efficacy in peritonitis and in diabetic patients. The elevated levels of maltose did not appear to have any clinical side effects.
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Affiliation(s)
- Ram Gokal
- Manchester RoyalInfirmary, Manchester
| | | | | | | | - S. Smith
- (Northern General Hospital, Sheffield)
| | | | | | | | | | | | | | - J. McKain
- (Queen Elizabeth Hospital, Birmingham)
| | | | | | | | | | - J. Walls
- (Leicester General Hospital, Leicester)
| | - C. Orton
- (Leicester General Hospital, Leicester)
| | | | - J. Grieves
- (Royal Victoria Hospital, NewcastleUpon-Tyne)
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Gokal R, Mistry CD, Peers EM, Brown C, Smith S, Edwards D, Junor B, Gordon A, McMillan M, Robertson M, Michael J, McKain J, Raftery M, Peters J, Clutterbuck E, Clemenger M, Walls J, Orton C, Goodship T, Grieves J, Olubodun J, Jackson F, Dharmasena D, Hourahane G, Howarth D, Boyes R, Clisby L, Beran Y. Peritonitis Occurrence in a Multicenter Study of Icodextrin and Glucose in Capd. Perit Dial Int 2020. [DOI: 10.1177/089686089501506s07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objective To compare peritonitis occurrence and outcome in a large U.K. study Multicentre Investigation of Icodextrin in Ambulatory Dialysis (MIDAS). Design Prospective, randomized, controlled 6-month comparison of icodextrin with glucose for the long dwell in continuous ambulatory peritoneal dialysis (CAPD) patients. Setting Eleven CAPD units in U.K. teaching hospitals. Patients A total of 209 patients established on CAPD for at least 3 months (103 control, 106 icodextrin). Twentythree control (C) and 22 icodextrin (I) patients experienced peritonitis during the study. Intervention Patients who had peritonitis remained on treatment (unless CAPD was withdrawn, temporarily or permanently). Main Outcome Measures The main outcome measures were the rate of peritonitis and duration of CAPD treatment prestudy; the rate of peritonitis episodes and their outcome during study; the effect of peritonitis on laboratory variables, serum icodextrin metabolites, and ultrafiltration efficacy. Results Prestudy: Nine (39%) of C but 14 (64%) of I patients had suffered previous peritonitis episode(s), with overall rates of 0.58 and 0.78 episodes per patientyear, respectively. During study There were 31 C episodes and 35 I episodes, with overall rates of 0.76 and 0.93 per patientyear, respectively. The increase in the C and I groups was 31% and 19%, respectively. Serum osmolality and sodium levels were unaffected by peritonitis, and there was no increase in serum icodextrin metabolites during peritonitis. Overnight ultrafiltration volume during peritonitis (mean±SD) declined slightly from 218±354 mL to 185±299 mL (NS) in the control group, but increased in the icodextrin group from 570±146 mL to 723±218 mL (p < 0.01). Conclusions Using icodextrin for the long dwell in CAPD does not increase the rate of peritonitis, nor does it alter the outcome of peritonitis. Peritonitis does not affect uptake of icodextrin from the peritoneum.
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Affiliation(s)
| | - Ram Gokal
- Manchester Royal Infirmary, Cardiff Royal Infirmaryl and ML Laboratories2 plc, St. Albans, U.K
| | - Chandra D. Mistry
- Manchester Royal Infirmary, Cardiff Royal Infirmaryl and ML Laboratories2 plc, St. Albans, U.K
| | - Elizabeth M. Peers
- Manchester Royal Infirmary, Cardiff Royal Infirmaryl and ML Laboratories2 plc, St. Albans, U.K
| | | | - S. Smith
- Northern General Hospital, Sheffield
| | | | | | | | | | | | | | - J. McKain
- Queen Elizabeth Hospital, Birmingham
| | | | | | | | | | - J. Walls
- Leicester General Hospital, Leicester
| | - C. Orton
- Leicester General Hospital, Leicester
| | | | - J. Grieves
- Royal Victoria Hospital, Newcastle-upon Tyne
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Thielmann M, Vaghiri S, Dirkmann D, Neuhäuser M, Peters J, Heusch G, Jakob H, Ruhparwar A, Kamler M, Kleinbongard P. Remote Ischemic Preconditioning in Elective Cardiac Surgery: Long-Term Overall Survival Benefit in a Single-Center Randomized Double-Blinded Controlled Trial. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705456] [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: 10/24/2022]
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21
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Gruber S, Vorhauer N, Schulz M, Hilmer M, Peters J, Tsotsas E, Foerst P. Estimation of the local sublimation front velocities from neutron radiography and tomography of particulate matter. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2019.115268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Yang J, Duursma RA, De Kauwe MG, Kumarathunge D, Jiang M, Mahmud K, Gimeno TE, Crous KY, Ellsworth DS, Peters J, Choat B, Eamus D, Medlyn BE. Incorporating non-stomatal limitation improves the performance of leaf and canopy models at high vapour pressure deficit. Tree Physiol 2019; 39:1961-1974. [PMID: 31631220 DOI: 10.1093/treephys/tpz103] [Citation(s) in RCA: 1] [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: 05/08/2019] [Revised: 08/02/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
Vapour pressure deficit (D) is projected to increase in the future as temperature rises. In response to increased D, stomatal conductance (gs) and photosynthesis (A) are reduced, which may result in significant reductions in terrestrial carbon, water and energy fluxes. It is thus important for gas exchange models to capture the observed responses of gs and A with increasing D. We tested a series of coupled A-gs models against leaf gas exchange measurements from the Cumberland Plain Woodland (Australia), where D regularly exceeds 2 kPa and can reach 8 kPa in summer. Two commonly used A-gs models were not able to capture the observed decrease in A and gs with increasing D at the leaf scale. To explain this decrease in A and gs, two alternative hypotheses were tested: hydraulic limitation (i.e., plants reduce gs and/or A due to insufficient water supply) and non-stomatal limitation (i.e., downregulation of photosynthetic capacity). We found that the model that incorporated a non-stomatal limitation captured the observations with high fidelity and required the fewest number of parameters. Whilst the model incorporating hydraulic limitation captured the observed A and gs, it did so via a physical mechanism that is incorrect. We then incorporated a non-stomatal limitation into the stand model, MAESPA, to examine its impact on canopy transpiration and gross primary production. Accounting for a non-stomatal limitation reduced the predicted transpiration by ~19%, improving the correspondence with sap flow measurements, and gross primary production by ~14%. Given the projected global increases in D associated with future warming, these findings suggest that models may need to incorporate non-stomatal limitation to accurately simulate A and gs in the future with high D. Further data on non-stomatal limitation at high D should be a priority, in order to determine the generality of our results and develop a widely applicable model.
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Affiliation(s)
- J Yang
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - R A Duursma
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - M G De Kauwe
- ARC Centre of Excellence for Climate Extremes, Sydney, NSW 2052, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - D Kumarathunge
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - M Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - K Mahmud
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - T E Gimeno
- Basque Centre for Climate Change, Scientific Campus of the University of the Basque Country, Leioa 4894, Spain
- IKERBASQUE, Basque Foundation for Science, 48008 Bilbao, Spain
| | - K Y Crous
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - D S Ellsworth
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - J Peters
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - B Choat
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
| | - D Eamus
- School of Life Sciences, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - B E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2750, Australia
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Natali F, Dolce C, Peters J, Stelletta C, Demé B, Ollivier J, Leduc G, Cupane A, Barbier EL. Brain lateralization probed by water diffusion at the atomic to micrometric scale. Sci Rep 2019; 9:14694. [PMID: 31604980 PMCID: PMC6789030 DOI: 10.1038/s41598-019-51022-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 09/23/2019] [Indexed: 01/27/2023] Open
Abstract
Combined neutron scattering and diffusion nuclear magnetic resonance experiments have been used to reveal significant interregional asymmetries (lateralization) in bovine brain hemispheres in terms of myelin arrangement and water dynamics at micron to atomic scales. Thicker myelin sheaths were found in the left hemisphere using neutron diffraction. 4.7 T dMRI and quasi-elastic neutron experiments highlighted significant differences in the properties of water dynamics in the two hemispheres. The results were interpreted in terms of hemisphere-dependent cellular composition (number of neurons, cell distribution, etc.) as well as specificity of neurological functions (such as preferential networking).
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Affiliation(s)
- F Natali
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France.
- CNR-IOM, OGG, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France.
| | - C Dolce
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France
- University Grenoble Alpes, LiPhy, 140 rue de la physique, 38402, Saint Martin d'Hères, France
- Department of Physics and Chemistry, University of Palermo, via Archirafi 36, 90123, Palermo, Italy
| | - J Peters
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France
- University Grenoble Alpes, LiPhy, 140 rue de la physique, 38402, Saint Martin d'Hères, France
| | - C Stelletta
- Department of Animal Med., Production and Health, University of Padova, Viale dell'Università 16, 35020, Agripolis, Legnaro, Italy
| | - B Demé
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France
| | - J Ollivier
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France
| | - G Leduc
- Biomedical Facility, ESRF, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France
| | - A Cupane
- Department of Physics and Chemistry, University of Palermo, via Archirafi 36, 90123, Palermo, Italy
| | - E L Barbier
- University Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000, Grenoble, France
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Ahn M, Cantarini M, Frewer P, Hawkins G, Peters J, Howarth P, Ahmed G, Sahota T, Hartmaier R, Li-Sucholeiki X, Oxnard G. P1.01-134 SAVANNAH: Phase II Trial of Osimertinib + Savolitinib in EGFR-Mutant, MET-Driven Advanced NSCLC, Following Prior Osimertinib. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Malewicz NM, Walstein K, Heine T, Engler A, Bick A, Cox L, Dötsch A, Westendorf AM, Horn PA, Lindemann M, Peters J, Schäfer ST. Early suppression of peripheral mononuclear blood cells in sepsis in response to stimulation with cytomegalovirus, OKT3, and pokeweed mitogen. J Appl Physiol (1985) 2019; 127:1539-1547. [PMID: 31545153 DOI: 10.1152/japplphysiol.00438.2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Critically ill patients are at risk for sepsis, and immunosuppressive mechanisms may prevail. Whether functional tests are helpful to detect immune alterations is largely unknown. Therefore, we tested the hypotheses that reactivity of peripheral blood mononuclear cells (PBMCs) to secrete interferon-γ (IFNγ) following stimulation in vitro is decreased in patients with early sepsis compared with postoperative patients. IFNγ secretion [enzyme-linked immunospot (ELISpot)] in response to stimulation with cytomegalovirus (CMV), pokeweed mitogen (PWM), muromonab-anti-CD3 (OKT3), and human leukocyte antigen (HLA)-DRA-mRNA expression and serum cytokine concentrations were repeatedly [days 1, 3, 5, and 7 after intensive care unit (ICU) admission] determined in patients with sepsis (n = 7) and patients undergoing major abdominal surgery (radical prostatectomy, cystectomy, n = 10). In a second cohort, HLA-DRA expression was assessed in 80 patients with sepsis, 30 postoperative patients, and 44 healthy volunteers (German clinical trials database no. 00007694). In patients with sepsis, IFNγ secretion (ELISpot) was decreased compared with controls after stimulation with CMV (P = 0.01), OKT3 (P = 0.02), and PWM (P = 0.02 on day 5), whereas unstimulated IFNγ secretion did not differ. HLA-DRA expression was also significantly decreased in patients with sepsis at all time points (P = 0.004) compared with postoperative surgical patients, a finding confirmed in the larger cohort. Reactivity of PBMCs to stimulation with CMV, PWM, and OKT3 as well as HLA-DRA expression was already decreased upon ICU admission in patients with sepsis when compared with postoperative controls, suggesting early depression of acquired immunity. ELISpot assays may help to clinically characterize the time course of immunocompetence in patients with sepsis.NEW & NOTEWORTHY We observed suppression of reactivity to stimulation with cytomegalovirus, muromonab-anti-CD3, and pokeweed mitogen in mononuclear blood cells of patients with early sepsis when compared with postoperative controls. Thus, there is early depression of acquired immunity in sepsis. Enzyme-linked immunospot assays may help to characterize immunocompetence in patients with sepsis.
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Affiliation(s)
- N M Malewicz
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - K Walstein
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - T Heine
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - A Engler
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - A Bick
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - L Cox
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - A Dötsch
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - A M Westendorf
- Institute for Medical Microbiology, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - P A Horn
- Institute for Transfusion Medicine, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - M Lindemann
- Institute for Transfusion Medicine, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - J Peters
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany
| | - S T Schäfer
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen & Universitätsklinikum, Essen, Germany.,Department of Anaesthesiology, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany
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26
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Natali F, Dolce C, Peters J, Stelletta C, Demé B, Ollivier J, Boehm M, Leduc G, Piazza I, Cupane A, Barbier EL. Anomalous water dynamics in brain: a combined diffusion magnetic resonance imaging and neutron scattering investigation. J R Soc Interface 2019; 16:20190186. [PMID: 31409238 DOI: 10.1098/rsif.2019.0186] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Water diffusion is an optimal tool for investigating the architecture of brain tissue on which modern medical diagnostic imaging techniques rely. However, intrinsic tissue heterogeneity causes systematic deviations from pure free-water diffusion behaviour. To date, numerous theoretical and empirical approaches have been proposed to explain the non-Gaussian profile of this process. The aim of this work is to shed light on the physics piloting water diffusion in brain tissue at the micrometre-to-atomic scale. Combined diffusion magnetic resonance imaging and first pioneering neutron scattering experiments on bovine brain tissue have been performed in order to probe diffusion distances up to macromolecular separation. The coexistence of free-like and confined water populations in brain tissue extracted from a bovine right hemisphere has been revealed at the micrometre and atomic scale. The results are relevant for improving the modelling of the physics driving intra- and extracellular water diffusion in brain, with evident benefit for the diffusion magnetic resonance imaging technique, nowadays widely used to diagnose, at the micrometre scale, brain diseases such as ischemia and tumours.
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Affiliation(s)
- F Natali
- Institut Laue-Langevin, Grenoble Cedex 9, France.,CNR-IOM, OGG, Grenoble Cedex 9, France
| | - C Dolce
- Institut Laue-Langevin, Grenoble Cedex 9, France.,CNRS, Univ. Grenoble Alpes, LIPhy, 38000 Grenoble, France.,Department of Physics and Chemistry, University of Palermo, Palermo, Italy
| | - J Peters
- Institut Laue-Langevin, Grenoble Cedex 9, France.,CNRS, Univ. Grenoble Alpes, LIPhy, 38000 Grenoble, France
| | - C Stelletta
- Department of Animal Medicine, Production and Health, University of Padova, Padova, Italy
| | - B Demé
- Institut Laue-Langevin, Grenoble Cedex 9, France
| | - J Ollivier
- Institut Laue-Langevin, Grenoble Cedex 9, France
| | - M Boehm
- Institut Laue-Langevin, Grenoble Cedex 9, France
| | - G Leduc
- Biomedical Facility, ESRF, Grenoble, France
| | - I Piazza
- Institut Laue-Langevin, Grenoble Cedex 9, France.,Department of Physics and Chemistry, University of Palermo, Palermo, Italy
| | - A Cupane
- Department of Physics and Chemistry, University of Palermo, Palermo, Italy
| | - E L Barbier
- Grenoble Institut Neurosciences, University of Grenoble Alpes, Inserm, U1216, 38000 Grenoble, France
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Abstract
The last century has seen a large development in diffraction techniques. The time-of-flight neutron diffraction method is now so advanced that it provides high precision results for position and thermal parameters, which are complementary to other diffraction results from X-ray sources. Here we review the history of neutron sources, the difficulties encountered with the time-of-flight technique and an outlook for applications. In this context, we will show the limitations of existing neutron sources and the expected advantages of new spallation neutron sources. An overview of all corrections to be taken into account with the wavelength-sorting technique will be presented as well as actual results, how to overcome such problems, and the special difficulty of integration of three-dimensional Bragg peaks.
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Affiliation(s)
- J. Peters
- Hahn-Meitner-Institut Berlin, Glienicker Str. 100, D – 14109 Berlin, Germany
| | - W. Jauch
- Hahn-Meitner-Institut Berlin, Glienicker Str. 100, D – 14109 Berlin, Germany
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28
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Zeller D, Telling MTF, Zamponi M, García Sakai V, Peters J. Analysis of elastic incoherent neutron scattering data beyond the Gaussian approximation. J Chem Phys 2018; 149:234908. [PMID: 30579322 DOI: 10.1063/1.5049938] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
This work addresses the use of the Gaussian approximation as a common tool to extract atomic motions in proteins from elastic incoherent neutron scattering and whether improvements in data analysis and additional information can be obtained when going beyond that. We measured alpha-lactalbumin with different levels of hydration on three neutron backscattering spectrometers, to be able to resolve a wide temporal and spatial range for dynamics. We demonstrate that the Gaussian approximation gives qualitatively similar results to models that include heterogeneity, if one respects a certain procedure to treat the intercept of the elastic intensities with the momentum transfer axis. However, the inclusion of motional heterogeneity provides better fits to the data. Our analysis suggests an approach of limited heterogeneity, where including only two kinds of motions appears sufficient to obtain more quantitative results for the mean square displacement. Finally, we note that traditional backscattering spectrometers pose a limit on the lowest accessible momentum transfer. We therefore suggest that complementary information about the spatial evolution of the elastic intensity close to zero momentum transfer can be obtained using other neutron methods, in particular, neutron spin-echo together with polarization analysis.
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Affiliation(s)
- D Zeller
- Université Grenoble Alpes, CNRS, LiPhy, 140 av. de la Physique, 38000 Grenoble, France
| | - M T F Telling
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom
| | - M Zamponi
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstr. 1, 85748 Garching, Germany
| | - V García Sakai
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom
| | - J Peters
- Université Grenoble Alpes, CNRS, LiPhy, 140 av. de la Physique, 38000 Grenoble, France
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Anton A, Ballok Z, Bowden P, Costello T, Harewood L, Corcoran N, Dundee P, Peters J, Lawrentschuk N, Troy A, Webb D, Chan Y, See A, Siva S, Murphy D, Hofman M, Tran B. Using PSMA PET/CT to assess response in metastatic prostate cancer (mPC) patients (pts) receiving upfront chemohormonal therapy. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy434.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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30
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Dundee P, Gross T, Moran D, Ryan A, Ballok Z, Peters J, Costello AJ. Ga-labeled Prostate-specific Membrane Antigen Ligand-positron-emission Tomography: Still Just the Tip of the Iceberg. Urology 2018; 120:187-191. [DOI: 10.1016/j.urology.2018.06.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 06/03/2018] [Accepted: 06/17/2018] [Indexed: 11/15/2022]
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31
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Mueller JL, Lam CT, Dahl D, Asiedu MN, Krieger MS, Bellido-Fuentes Y, Kellish M, Peters J, Erkanli A, Ortiz EJ, Muasher LC, Taylor PT, Schmitt JW, Venegas G, Ramanujam N. Portable Pocket colposcopy performs comparably to standard-of-care clinical colposcopy using acetic acid and Lugol's iodine as contrast mediators: an investigational study in Peru. BJOG 2018; 125:1321-1329. [PMID: 29893472 DOI: 10.1111/1471-0528.15326] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/01/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Our goal was to develop a tele-colposcopy platform for primary-care clinics to improve screening sensitivity and access. Specifically, we developed a low-cost, portable Pocket colposcope and evaluated its performance in a tertiary healthcare centre in Peru. DESIGN AND SETTING Images of the cervix were captured with a standard-of-care and Pocket colposcope at la Liga Contra el Cáncer in Lima, Peru. POPULATION Two hundred Peruvian women with abnormal cytology and/or human papillomavirus positivity were enrolled. METHODS Images were collected using acetic acid and Lugol's iodine as contrast agents. Biopsies were taken as per standard-of-care procedures. MAIN OUTCOME MEASURES After passing quality review, images from 129 women were sent to four physicians who provided a diagnosis for each image. RESULTS Physician interpretation of images from the two colposcopes agreed 83.1% of the time. The average sensitivity and specificity of physician interpretation compared with pathology was similar for the Pocket (sensitivity = 71.2%, specificity = 57.5%) and standard-of-care (sensitivity = 79.8%, specificity = 56.6%) colposcopes. When compared with a previous study where only acetic acid was applied to the cervix, results indicated that adding Lugol's iodine as a secondary contrast agent improved the percent agreement between colposcopes for all pathological categories by up to 8.9% and the sensitivity and specificity of physician interpretation compared with pathology by over 6.0 and 9.0%, respectively. CONCLUSIONS The Pocket colposcope performance was similar to that of a standard-of-care colposcope when used to identify precancerous and cancerous lesions using acetic acid and Lugol's iodine during colposcopy examinations in Peru. TWEETABLE ABSTRACT The Pocket colposcope performance was similar to that of a standard-of-care colposcope when identifying cervical lesions.
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Affiliation(s)
- J L Mueller
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - C T Lam
- Department of Biomedical Engineering, Duke University, Durham, NC, USA.,Duke Global Health Institute, Duke University, Durham, NC, USA
| | - D Dahl
- Duke Global Health Institute, Duke University, Durham, NC, USA
| | - M N Asiedu
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - M S Krieger
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | | | - M Kellish
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - J Peters
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - A Erkanli
- Department of Biostatistics and Bioinformatics, Duke University Medical School, Durham, NC, USA
| | - E J Ortiz
- Duke Global Health Institute, Duke University, Durham, NC, USA
| | - L C Muasher
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC, USA
| | - P T Taylor
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC, USA.,Kilimanjaro Christian Medical Centre, Moshi, Tanzania
| | - J W Schmitt
- Duke Global Health Institute, Duke University, Durham, NC, USA.,Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC, USA
| | - G Venegas
- Liga Contra el Cáncer, Pueblo Libre, Lima, Peru
| | - N Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC, USA.,Duke Global Health Institute, Duke University, Durham, NC, USA
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Warner R, Bastianpillai C, Allchorne P, Chowdhury S, Graham S, Li CY, Pal P, Peters J, Hines J, Green J. 10,000 urology emergencies: A single centre series – The changing shape of acute urology. Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.634] [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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Klenke S, de Vries G, Schiefer L, Seyffert N, Bachmann H, Peters J, Frey U. CHRM3 rs2165870 polymorphism is independently associated with postoperative nausea and vomiting, but combined prophylaxis is effective. Br J Anaesth 2018; 121:58-65. [DOI: 10.1016/j.bja.2018.02.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 02/17/2018] [Accepted: 02/21/2018] [Indexed: 01/31/2023] Open
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Costello D, Cathcart P, Parkin C, Frydenberg M, Moon D, Peters J, El Hage O, Challacombe B, Costello A. MP40-18 TITLE: PIRADS 3 RADIOLOGIC “GREY ZONE” - WHAT PROPORTION OF MEN WHO HAVE PIRADS 3 LESIONS REPORTED ON MP-MRI HAVE PROSTATE CANCER? J Urol 2018. [DOI: 10.1016/j.juro.2018.02.1285] [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: 10/17/2022]
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35
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Guiral M, Neitzel C, Salvador Castell M, Martinez N, Giudici-Orticoni MT, Peters J. The effect of pH on the dynamics of natural membranes. Eur Phys J E Soft Matter 2018; 41:22. [PMID: 29464436 DOI: 10.1140/epje/i2018-11630-y] [Citation(s) in RCA: 1] [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: 11/30/2017] [Accepted: 01/25/2018] [Indexed: 06/08/2023]
Abstract
Pure phospholipids and membrane fragments from bacterial cells living under various conditions were studied against the influence of the surrounding acidity on the internal dynamics. For that we compared mean square displacements extracted from elastic incoherent neutron scattering data, measured both at low and at neutral pH, of the phospholipids 1,2-dimyristoyl-sn-glycero-3-phosphocholine and of samples from neutralophilic and acidophilic micro-organisms (some being hyperthermophilic and others mesophilic). The lipids showed a slight shift in the phase transition temperature of about 4 degrees under pH variation and became slightly more mobile at lower pH. The membrane fragments not used to extreme acidic conditions were significantly more sensitive to variations in the pH values, whereas the acidophilic and -tolerant samples were much less influenced by this parameter. They presented the higher softness at low pH, which was closer to their native condition. Such findings might be a hint for adaptation mechanisms to different acidity conditions.
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Affiliation(s)
- M Guiral
- Aix Marseille Univ, CNRS, BIP, Marseille, France
| | - C Neitzel
- Univ. Grenoble Alpes, CNRS, LiPhy, F-38000, Grenoble, France
- Institut Laue Langevin, Cedex 9, F-38042, Grenoble, France
| | - M Salvador Castell
- Univ. Grenoble Alpes, CNRS, LiPhy, F-38000, Grenoble, France
- Institut Laue Langevin, Cedex 9, F-38042, Grenoble, France
| | - N Martinez
- Univ. Grenoble Alpes, CNRS, LiPhy, F-38000, Grenoble, France
- Institut Laue Langevin, Cedex 9, F-38042, Grenoble, France
| | | | - J Peters
- Univ. Grenoble Alpes, CNRS, LiPhy, F-38000, Grenoble, France.
- Institut Laue Langevin, Cedex 9, F-38042, Grenoble, France.
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36
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Al-Ayoubi SR, Schummel PH, Golub M, Peters J, Winter R. Influence of cosolvents, self-crowding, temperature and pressure on the sub-nanosecond dynamics and folding stability of lysozyme. Phys Chem Chem Phys 2018; 19:14230-14237. [PMID: 28447688 DOI: 10.1039/c7cp00705a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We studied the effects of temperature and hydrostatic pressure on the dynamical properties and folding stability of highly concentrated lysozyme solutions in the absence and presence of the osmolytes trimethylamine-N-oxide (TMAO) and urea. Elastic incoherent neutron scattering (EINS) was applied to determine the mean-squared displacement (MSD) of the protein's hydrogen atoms to yield insights into the effects of these cosolvents on the averaged sub-nanosecond dynamics in the pressure range from ambient up to 4000 bar. To evaluate the additional effect of self-crowding, two protein concentrations (80 and 160 mg mL-1) were used. We observed a distinct effect of TMAO on the internal hydrogen dynamics, namely a reduced mobility. Urea, on the other hand, revealed no marked effect and consequently, no counteracting effect in an urea-TMAO mixture was observed. Different from the less concentrated protein solution, no significant effect of pressure on the MSD was observed for 160 mg mL-1 lysozyme. The EINS experiments were complemented by Fourier-transform infrared (FTIR) spectroscopy measurements, which led to additional insights into the folding stability of lysozyme under the various environmental conditions. We observed a stabilization of the protein in the presence of the compatible osmolyte TMAO and a destabilization in the presence of urea against temperature and pressure for both protein concentrations. Additionally, we noticed a slight destabilizing effect upon self-crowding at very high protein concentration (160 mg mL-1), which is attributable to transient destabilizing intermolecular interactions. Furthermore, a pressure-temperature diagram could be obtained for lysozyme at these high protein concentrations that mimics densely packed intracellular conditions.
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Affiliation(s)
- S R Al-Ayoubi
- Physical Chemistry I - Biophysical Chemistry, Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany.
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Bronzwaer MES, Koens L, Bemelman WA, Dekker E, Fockens P, Tuynman J, de Bruin G, Van Geloven A, Bruins Slot W, van der Hulst R, Vuylsteke R, Cahen D, Baan A, Dekkers P, den Boer F, Depla A, Bruin S, Jansen J, Gerhards M, Stokkers P, van Tets W, Mundt M, van de Ven A, Peters J, Cense H, van der Spek B, Dunker M, van Leerdam M, Aalbers A, Vlug M, Sonneveld D. Volume of surgery for benign colorectal polyps in the last 11 years. Gastrointest Endosc 2018; 87:552-561.e1. [PMID: 29108978 DOI: 10.1016/j.gie.2017.10.032] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 10/14/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIMS Traditionally large, complex colorectal polyps were managed by surgical resection (SR), and in recent years endoscopic resection (ER) has progressed significantly. However, to what extent ER has replaced SR remains largely unknown. We performed a multicenter retrospective cohort study to assess the volume and volume changes of SR for benign colorectal polyps over the past decade. METHODS Patients who underwent SR for a benign colorectal polyp in the Netherlands between 2005 and 2015 were selected from the prospective nationwide Dutch Pathology Registry (PALGA database). Clinical characteristics were obtained from the charts of patients who underwent SR in the province of Noord-Holland. RESULTS A total of 5937 patients were treated with SR for a colorectal polyp and the absolute (454-739 per year) and relative volumes (0.20%-0.37% per colonoscopy per year) of SR remained stable. In the province of Noord-Holland, 928 patients (15.6%) underwent SR. In these patients, submucosal lifting and ER were attempted in 19.9% (n = 175) and 15.0% (n = 134). After 2010, patients were more likely to undergo lifting (27.7% vs 11.4%, P < .001) and ER attempts (18.8% vs 10.9%, P = .001) before definitive SR. Twenty-two patients (2.4%) had been referred to another endoscopy clinic. CONCLUSIONS SR for large, complex colorectal polyps is still frequently performed and has remained stable. A small percentage of patients underwent ER attempts before SR, and referral for an additional ER attempt only occurred in a minority of cases. To increase ER attempts, implementation of a regional multidisciplinary referral network should be considered.
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Affiliation(s)
- Maxime E S Bronzwaer
- Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Lianne Koens
- Department of Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Willem A Bemelman
- Department of Pathology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Evelien Dekker
- Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Paul Fockens
- Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
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38
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Affiliation(s)
- J S Kalsi
- Institute of Urology and Nephrology, 48 Riding House Street, London W1P 7NN, UK.
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39
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Lelièvre-Berna E, Demé B, Gonthier J, Gonzales JP, Maurice J, Memphis Y, Payre C, Oger P, Peters J, Vial S. 700 MPa sample stick for studying liquid samples or solid-gas reactions down to 1.8 K and up to 550 K. JNR 2017. [DOI: 10.3233/jnr-170044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - B. Demé
- Institut Laue Langevin, Grenoble, France
| | | | | | - J. Maurice
- Institut Laue Langevin, Grenoble, France
| | - Y. Memphis
- Institut Laue Langevin, Grenoble, France
| | - C. Payre
- Institut Laue Langevin, Grenoble, France
| | - P. Oger
- Laboratoire de Microbiologie, Adaptation et Pathogénie, INSA, Lyon, France
| | - J. Peters
- Institut Laue Langevin, Grenoble, France
- PhITEM Department, University Grenoble Alpes, Grenoble, France
- Laboratoire Interdisciplinaire de Physique (LiPhy), Grenoble, France
| | - S. Vial
- Institut Laue Langevin, Grenoble, France
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40
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Peters J, Marion J, Becher FJ, Trapp M, Gutberlet T, Bicout DJ, Heimburg T. Thermodynamics of lipid multi-lamellar vesicles in presence of sterols at high hydrostatic pressure. Sci Rep 2017; 7:15339. [PMID: 29127413 PMCID: PMC5681575 DOI: 10.1038/s41598-017-15582-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 05/24/2017] [Accepted: 10/30/2017] [Indexed: 01/28/2023] Open
Abstract
We compared the effect of cholesterol at different concentration on the phase behaviour of DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine) multilamellar vesicles. We used pressure perturbation differential scanning calorimetry (PPC) that studies a system on the whole by giving access to relevant thermodynamic quantities, and elastic incoherent neutron scattering (EINS) that probes local motions of a system at the atomic level by allowing extraction of dynamical parameters. PPC revealed that the volume expansion coefficient of DMPC and DMPC/Cholesterol samples with 13 and 25 mol% cholesterol is a linear function of the heat capacity measured by differential scanning calorimetry. Neutron backscattering spectroscopy showed that the mean square displacements of H atoms do exhibit an increase with temperature and a decrease under increasing pressure. Cholesterol added at concentrations of 25 and 50 mol% led to suppression of the main phase transition. Taking advantage of these results, the present study aims (i) to show that calorimetry and EINS using the Bicout and Zaccai model equally permit to get access to thermodynamic quantities characterizing pure DMPC and DMPC/cholesterol mixtures, thus directly confirming the theoretical method, and (ii) to validate our approach as function of temperature and of pressure, as both are equally important and complementary thermodynamic variables.
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Affiliation(s)
- J Peters
- Univ. Grenoble Alpes, LiPhy, 140 Rue de la Physique, 38402, Saint-Martin-d'Hères, France. .,Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France.
| | - J Marion
- Univ. Grenoble Alpes, LiPhy, 140 Rue de la Physique, 38402, Saint-Martin-d'Hères, France.,Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France
| | - F J Becher
- Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100, Copenhagen, Denmark.,Department of Chemistry, University of Cambridge, Lensfield Rd, Cambridge, CB2 1EW, UK
| | - M Trapp
- Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - T Gutberlet
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85748, Garching, Germany
| | - D J Bicout
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble cedex 9, France.,Biomathématiques et épidémiologie, EPSP - TIMC-IMAG, UMR CNRS 5525, Université Grenoble Alpes, VetAgro Sup Lyon, 69280, Marcy l'Etoile, France
| | - T Heimburg
- Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100, Copenhagen, Denmark
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Engler H, Brendt P, Wischermann J, Wegner A, Röhling R, Schoemberg T, Meyer U, Gold R, Peters J, Benson S, Schedlowski M. Selective increase of cerebrospinal fluid IL-6 during experimental systemic inflammation in humans: association with depressive symptoms. Mol Psychiatry 2017; 22:1448-1454. [PMID: 28138158 DOI: 10.1038/mp.2016.264] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 11/03/2016] [Accepted: 12/14/2016] [Indexed: 12/31/2022]
Abstract
Systemic inflammation is accompanied by profound behavioral and mood changes that resemble symptoms of depression. Findings in animals suggest that pro-inflammatory cytokines released by activated immune cells in the periphery evoke these behavioral symptoms by driving inflammatory changes in the brain. However, experimental data in humans are lacking. Here we demonstrate in healthy male volunteers (10 endotoxin treated, 8 placebo treated) that intravenous administration of low-dose endotoxin (0.8 ng/kg body weight), a prototypical pathogen-associated molecular pattern that activates the innate immune system, not only induces a significant increase in peripheral blood cytokine concentrations (that is, tumor necrosis factor-α, interleukin (IL)-6, IL-10) but also results, with some latency, in a robust and selective increase of IL-6 in the cerebrospinal fluid (CSF). Moreover, we found a strong association between the endotoxin-induced increase of IL-6 in the CSF and the severity of mood impairment, with larger increases in CSF IL-6 concentration followed by a greater deterioration in mood. Taken together, these findings suggest that the appearance of depressive symptoms in inflammatory conditions might be primarily linked to an increase in central IL-6 concentration, identifying IL-6 as a potential therapeutic target in mood disorders.
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Affiliation(s)
- H Engler
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - P Brendt
- Clinic for Anesthesiology and Intensive Care Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - J Wischermann
- Clinic for Anesthesiology and Intensive Care Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - A Wegner
- Department of Orthopedic and Trauma Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - R Röhling
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - T Schoemberg
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - U Meyer
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
| | - R Gold
- Department of Neurology, St Josef-Hospital, Ruhr University, Bochum, Germany
| | - J Peters
- Clinic for Anesthesiology and Intensive Care Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - S Benson
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - M Schedlowski
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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Sathianathen NJ, Lamb AD, Lawrentschuk NL, Goad JR, Peters J, Costello AJ, Murphy DG, Moon DA. Changing face of robot-assisted radical prostatectomy in Melbourne over 12 years. ANZ J Surg 2017; 88:E200-E203. [DOI: 10.1111/ans.14169] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/21/2017] [Accepted: 07/04/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Niranjan J. Sathianathen
- Division of Cancer Surgery, Department of Genitourinary Oncology; Peter MacCallum Cancer Centre; Melbourne Victoria Australia
| | - Alastair D. Lamb
- Division of Cancer Surgery, Department of Genitourinary Oncology; Peter MacCallum Cancer Centre; Melbourne Victoria Australia
- Department of Urology; Royal Melbourne Hospital; Melbourne Victoria Australia
| | - Nathan L. Lawrentschuk
- Division of Cancer Surgery, Department of Genitourinary Oncology; Peter MacCallum Cancer Centre; Melbourne Victoria Australia
- Department of Surgery, Austin Hospital; The University of Melbourne; Melbourne Victoria Australia
| | - Jeremy R. Goad
- Division of Cancer Surgery, Department of Genitourinary Oncology; Peter MacCallum Cancer Centre; Melbourne Victoria Australia
| | - Justin Peters
- Department of Urology; Royal Melbourne Hospital; Melbourne Victoria Australia
- Australian Prostate Cancer Research Centre; Epworth Healthcare; Melbourne Victoria Australia
| | - Anthony J. Costello
- Department of Urology; Royal Melbourne Hospital; Melbourne Victoria Australia
- Australian Prostate Cancer Research Centre; Epworth Healthcare; Melbourne Victoria Australia
| | - Declan G. Murphy
- Division of Cancer Surgery, Department of Genitourinary Oncology; Peter MacCallum Cancer Centre; Melbourne Victoria Australia
- Australian Prostate Cancer Research Centre; Epworth Healthcare; Melbourne Victoria Australia
| | - Daniel A. Moon
- Division of Cancer Surgery, Department of Genitourinary Oncology; Peter MacCallum Cancer Centre; Melbourne Victoria Australia
- Australian Prostate Cancer Research Centre; Epworth Healthcare; Melbourne Victoria Australia
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Peters J, Martinez N, Lehofer B, Prassl R. Low-density lipoproteins investigated under high hydrostatic pressure by elastic incoherent neutron scattering. Eur Phys J E Soft Matter 2017; 40:68. [PMID: 28733727 PMCID: PMC5589066 DOI: 10.1140/epje/i2017-11558-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 07/11/2017] [Indexed: 05/14/2023]
Abstract
Human low-density lipoprotein (LDL) is a highly complex nano-particle built up of various lipid classes and a single large protein moiety (apoB-100) owning essential physiological functions in the human body. Besides its vital role as a supplier of cholesterol and fat for peripheral tissues and cells, it is also a known key player in the formation of atherosclerosis. Due to these important roles in physiology and pathology the elucidation of structural and dynamical details is of great interest. In the current study we drew a broader picture of LDL dynamics using elastic incoherent neutron scattering (EINS) as a function of specified temperature and pressure points. We not only investigated a normolipidemic LDL sample, but also a triglyceride-rich and an oxidized one to mimic pathologic conditions as found under hyperlipidemic conditions or in atherosclerotic plaques, respectively. We could show that pressure has a significant effect on atomic motions in modified forms of LDL, whereas the normolipidemic sample seems to cope much better with high-pressure conditions irrespective of temperature. These findings might be explained by the altered lipid composition, which is either caused through elevated triglyceride content or modifications through lipid peroxidation.
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Affiliation(s)
- J Peters
- Univ. Grenoble Alpes, LiPhy, F-38044, Grenoble, France
- Institut Laue Langevin, F-38000, Grenoble, France
| | - N Martinez
- Institut Laue Langevin, F-38000, Grenoble, France
- Univ. Grenoble Alpes, IBS, F-38000, Grenoble, France
| | - B Lehofer
- Institute of Biophysics, Medical University of Graz, A-8010, Graz, Austria
| | - R Prassl
- Institute of Biophysics, Medical University of Graz, A-8010, Graz, Austria.
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Golub M, Lehofer B, Martinez N, Ollivier J, Kohlbrecher J, Prassl R, Peters J. High hydrostatic pressure specifically affects molecular dynamics and shape of low-density lipoprotein particles. Sci Rep 2017; 7:46034. [PMID: 28382948 PMCID: PMC5382586 DOI: 10.1038/srep46034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/08/2017] [Indexed: 12/12/2022] Open
Abstract
Lipid composition of human low-density lipoprotein (LDL) and its physicochemical characteristics are relevant for proper functioning of lipid transport in the blood circulation. To explore dynamical and structural features of LDL particles with either a normal or a triglyceride-rich lipid composition we combined coherent and incoherent neutron scattering methods. The investigations were carried out under high hydrostatic pressure (HHP), which is a versatile tool to study the physicochemical behavior of biomolecules in solution at a molecular level. Within both neutron techniques we applied HHP to probe the shape and degree of freedom of the possible motions (within the time windows of 15 and 100 ps) and consequently the flexibility of LDL particles. We found that HHP does not change the types of motion in LDL, but influences the portion of motions participating. Contrary to our assumption that lipoprotein particles, like membranes, are highly sensitive to pressure we determined that LDL copes surprisingly well with high pressure conditions, although the lipid composition, particularly the triglyceride content of the particles, impacts the molecular dynamics and shape arrangement of LDL under pressure.
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Affiliation(s)
- M. Golub
- Univ. Grenoble Alpes, IBS, Grenoble, F-38000, France
- Institut Laue Langevin, Grenoble, F-38000, France
| | - B. Lehofer
- Institute of Biophysics, Medical University of Graz, Graz, A-8010, Austria
| | - N. Martinez
- Univ. Grenoble Alpes, IBS, Grenoble, F-38000, France
- Institut Laue Langevin, Grenoble, F-38000, France
| | - J. Ollivier
- Institut Laue Langevin, Grenoble, F-38000, France
| | | | - R. Prassl
- Institute of Biophysics, Medical University of Graz, Graz, A-8010, Austria
| | - J. Peters
- Institut Laue Langevin, Grenoble, F-38000, France
- Univ. Grenoble Alpes, LiPhy, Grenoble, F-38044, France
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Andersson CD, Martinez N, Zeller D, Rondahl SH, Koza MM, Frick B, Ekström F, Peters J, Linusson A. Changes in dynamics of α-chymotrypsin due to covalent inhibitors investigated by elastic incoherent neutron scattering. Phys Chem Chem Phys 2017; 19:25369-25379. [DOI: 10.1039/c7cp04041e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dynamics of chymotrypsin increases when bound to two different covalent inhibitors. These effects were analyzed by univariate and multivariate methods.
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Affiliation(s)
| | - N. Martinez
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
- Univ. Grenoble Alpes
- IBS and LiPhy
| | - D. Zeller
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
- Univ. Grenoble Alpes
- IBS and LiPhy
| | - S. H. Rondahl
- CBRN Defence and Security
- Swedish Defence Research Agency
- SE-90621 Umeå
- Sweden
| | - M. M. Koza
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
| | - B. Frick
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
| | - F. Ekström
- CBRN Defence and Security
- Swedish Defence Research Agency
- SE-90621 Umeå
- Sweden
| | - J. Peters
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
- Univ. Grenoble Alpes
- IBS and LiPhy
| | - A. Linusson
- Department of Chemistry
- Umeå University
- SE-90187 Umeå
- Sweden
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Singh H, Peters J, Kaur Y, Diaz J. P153 Omalizumab therapy in asthmatics under 12 years of age: a real-life perspective (reality study). Ann Allergy Asthma Immunol 2016. [DOI: 10.1016/j.anai.2016.09.164] [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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Pang CL, Pilkington N, Roobottom C, Hyde C, Peters J. Abstract PR396. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492785.37931.79] [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: 11/05/2022]
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Wong LM, Tang V, Peters J, Costello A, Corcoran N. Feasibility for active surveillance in biopsy Gleason 3 + 4 prostate cancer: an Australian radical prostatectomy cohort. BJU Int 2016; 117 Suppl 4:82-7. [PMID: 27094971 DOI: 10.1111/bju.13460] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To examine the feasibility of active surveillance for low volume Gleason sum (GS) 3 + 4 disease compared to GS 3 + 3 disease. PATIENTS AND METHODS Retrospective review of 929 patients, with biopsy proven GS 3 + 3 and 3 + 4 PCa, undergoing upfront radical prostatectomy (RP) was performed. Suitability for AS was adapted from protocols by Royal Marsden Hospital, University of Toronto, and PRIAS by allowing Gleason 3 + 4 disease. The outcomes assessed were adverse pathology at RP (upgrading ≥GS 4 + 3 and/or upstaging ≥pT3) and biochemical recurrence (BCR) after RP. RESULTS Adverse pathology at RP was compared between GS 3 + 3 vs 3 + 4 groups. When selecting patients using Royal Marsden (n = 714) or University of Toronto (n = 699) protocols, there was statistically significantly more adverse pathology at RP in GS 3 + 4 group (21% vs 31%, P = 0.0028 and 19% vs 33%, P=<0.001 respectively). Using the more stringent PRIAS protocol (n = 198), there was no statistical significant difference in groups. There was no difference in BCR survival between biopsy GS 3 + 3 and 3 + 4 groups, regardless of which AS protocol assessed. Pre-operative PSA and clinical staging were the predictors for BCR. CONCLUSION Presence of Gleason 3 + 4 at biopsy, when compared to 3 + 3, increases the risk of adverse pathology being present at radical prostatectomy for less stringent selection criteria. When considering AS, a stricter protocol such as PRIAS, limiting PSA density and number of positive cores to ≤2, appears to decrease the risk of adverse pathology. No differences in BCR were seen between biopsy 3 + 3 and 3 + 4 disease, regardless of AS selection criteria.
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Affiliation(s)
- Lih-Ming Wong
- The Australian Prostate Cancer Centre at Epworth and Departments of Urology and Surgery, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia.,Department of Urology, St. Vincent's Hospital Melbourne, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia.,Department of Surgery, St. Vincent's Hospital Melbourne, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia
| | - Vincent Tang
- The Australian Prostate Cancer Centre at Epworth and Departments of Urology and Surgery, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia
| | - Justin Peters
- The Australian Prostate Cancer Centre at Epworth and Departments of Urology and Surgery, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia
| | - Anthony Costello
- The Australian Prostate Cancer Centre at Epworth and Departments of Urology and Surgery, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia
| | - Niall Corcoran
- The Australian Prostate Cancer Centre at Epworth and Departments of Urology and Surgery, Royal Melbourne Hospital and University of Melbourne, Parkville, VIC, Australia
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Thompson A, Adamson A, Bahl A, Borwell J, Dodds D, Heath C, Huddart R, Mcmenemin R, Patel P, Peters J, Payne H. Guidelines for the diagnosis, prevention and management of chemical- and radiation-induced cystitis. Journal of Clinical Urology 2016. [DOI: 10.1177/2051415813512647] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective Haemorrhagic cystitis (HC) is a relatively common complication of chemotherapy and radiotherapy to the pelvic area, but can be a challenging condition to treat, particularly since there is currently a lack of UK-led guidelines available on how it should optimally be defined and managed. Materials and methods A comprehensive literature search was undertaken to evaluate the evidence for the diagnosis, prevention and management of cancer treatment-induced HC. Results Recommendations and a proposed management algorithm for the diagnosis, prevention and treatment of HC, as well as the management of intractable haematuria, have been developed based on the expert opinion of the multidisciplinary consensus panel following a comprehensive review of the available clinical data. Conclusion These guidelines are relevant and applicable to current clinical practice and will help clinicians optimally define and manage this potentially serious condition.
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Affiliation(s)
- A Thompson
- Urology Department, Wrightington, Wigan and Leigh NHS Foundation Trust, UK
| | - A Adamson
- Department of Urology, Royal Hampshire County Hospital, UK
| | - A Bahl
- Bristol Oncology and Haematology Centre, UK
| | - J Borwell
- Department of Urology, Frimley Park Hospital, UK
| | - D Dodds
- Beatson West of Scotland Cancer Care, UK
| | - C Heath
- Southampton Oncology Centre, Southampton General Hospital, UK
| | | | | | - P Patel
- Queen Elizabeth Hospital, UK
| | - J Peters
- Whipps Cross Hospital, Barts Health NHS Trust, UK
| | - H Payne
- University College Hospital, UK
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