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Sattler L, Kan A, Hing W, Vertullo C. The addition of structured lifestyle modifications to a traditional exercise program for the management of patients with knee osteoarthritis: A systematic review and meta-analysis of randomised trials. Musculoskelet Sci Pract 2023; 68:102858. [PMID: 37793243 DOI: 10.1016/j.msksp.2023.102858] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/02/2023] [Accepted: 09/12/2023] [Indexed: 10/06/2023]
Abstract
BACKGROUND Guidelines recommend exercise for the management of knee osteoarthritis (OA), however, recently it has been suggested that including additional lifestyle modifications with a traditional exercise program may elicit greater benefits than exercise alone. OBJECTIVES To investigate the influence of the addition of lifestyle modifications to a traditional exercise program, with respect to functional outcomes and quality of life among individuals with knee OA. DESIGN Systematic review and meta-analysis. METHODS Four databases were searched to identify randomised controlled trials comparing an exercise program, which included the addition of lifestyle modifications, to an exercise program alone in individuals with knee OA. Methodological quality of included studies was assessed via the PEDro scale. Results synthesis through meta-analysis using a random effects model was conducted to determine the pooled effect on eligible outcomes and a GRADE approach was utilised to rate the certainty of evidence. RESULTS Meta-analysis of seven studies showed the inclusion of lifestyle modifications to an exercise program can further decrease pain intensity (SMD -0.68 [95% CI -1.26 to -0.10]), improve joint stiffness (MD -0.69 [95% CI -1.21, -0.17]) and increase physical function (MD -1.26 s ([95% CI -1.34, -1.17]) at six-months. Individual results showed improvements in quality of life with the addition of lifestyle modifications, however, this was not demonstrated through meta-analysis. CONCLUSION This systematic review supports the inclusion of additional lifestyle modifications to a traditional exercise program, for pain intensity, joint stiffness and physical function for individuals with knee OA. TRIAL REGISTRATION PROSPERO registration number: CRD42021279594.
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Affiliation(s)
- Larissa Sattler
- Institution: Bond University, Bond Institute of Health and Sport, 2 Promethean Way, Robina, QLD, 4226, Australia.
| | - Adrian Kan
- Institution: Bond University, Bond Institute of Health and Sport, 2 Promethean Way, Robina, QLD, 4226, Australia.
| | - Wayne Hing
- Institution: Bond University, Bond Institute of Health and Sport, 2 Promethean Way, Robina, QLD, 4226, Australia.
| | - Christopher Vertullo
- Institution: Knee Research Australia, 8-10 Carrara Street, Benowa, QLD, 4217, Australia.
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Sattler L, Kisaloff L, Cragnolini T, Peters R, Hing W. A comparison of functional outcomes following inpatient versus outpatient hip or knee arthroplasty. J Orthop Surg Res 2022; 17:372. [PMID: 35918770 PMCID: PMC9344712 DOI: 10.1186/s13018-022-03270-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/27/2022] [Indexed: 12/03/2022] Open
Abstract
Background The length of hospital stay after lower limb arthroplasty has rapidly decreased in the last decade, largely in part due to the rise of improved perioperative protocols, but also as a response to the increased economic demand associated with the rapid growth in hip and knee arthroplasty procedures. In line with this, the development of a new pathway after lower limb arthroplasty that allows for the surgery to be performed in an outpatient setting and permits for same-day discharge after the procedure is increasingly being offered. Although costs and complications between the inpatient and outpatient models have been compared, there appears to be little known about the effects on a patient’s physical function after undergoing hip or knee outpatient arthroplasty. Therefore, this systematic review aims to explore the available evidence for the effect on functional outcomes following inpatient versus outpatient hip or knee arthroplasty. Methods This systematic review adhered to the PRISMA guidelines and was prospectively registered (https://osf.io/8bfae/). An electronic search of three online databases (PubMed, CINAHL and EMBASE) was conducted to identify eligible studies. All studies investigating inpatient and outpatient comparator groups, for a population of patients undergoing hip or knee arthroplasty, that assessed one or more functional outcomes, were included. A methodological quality appraisal was undertaken for the final studies contained in this review. A narrative synthesis of results is described along with quantitative outcomes presented in tables and figures. Results A total of seven studies containing 1,876 participants were included in this review. Four studies assessed a THA population, two assessed TKA and one assessed both. Functional outcomes varied, with 20 different functional outcomes utilised, of which 18 were patient-reported tools. Results of functional outcomes offered mixed support for both inpatient and outpatient pathways. Conclusions The results of this review suggest that outpatient or inpatient pathway selection for hip or knee arthroplasty should not be based on the superiority of functional outcomes alone. However, given there is growing evidence in support of an outpatient pathway in select patients with respect to cost savings and without any increase in complications, it could be proposed that an equivalency of post-operative function between the two settings makes same-day discharge favourable. Publicly registered with Open Science Framework (https://osf.io/8bfae/). Supplementary Information The online version contains supplementary material available at 10.1186/s13018-022-03270-7.
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Affiliation(s)
- Larissa Sattler
- Bond Institute of Health and Sport, Bond University, 2 Promethean Way, Robina, QLD, 4226, Australia.
| | - Luke Kisaloff
- Bond Institute of Health and Sport, Bond University, 2 Promethean Way, Robina, QLD, 4226, Australia
| | - Taiyler Cragnolini
- Bond Institute of Health and Sport, Bond University, 2 Promethean Way, Robina, QLD, 4226, Australia
| | - Radd Peters
- Bond Institute of Health and Sport, Bond University, 2 Promethean Way, Robina, QLD, 4226, Australia
| | - Wayne Hing
- Bond Institute of Health and Sport, Bond University, 2 Promethean Way, Robina, QLD, 4226, Australia
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Matsushita K, Marchandot B, Hess S, Kibler M, Sato C, Heger J, Truong D, Trimaille A, Sattler L, Grunebaum L, Reydel Dedieu A, Jesel L, Ohlmann P, Morel O. Primary hemostatic disorders drive early and late major bleedings of patients with atrial fibrillation after transcatheter aortic valve replacement. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2021.09.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Trimaille A, Marchandot B, Oulehri W, Carmona A, Vollmer O, Poindron V, Matsushita K, Sattler L, Grunebaum L, Korganow A, Schini-Kerth V, Morel O. Transient endothelial injury and release of lupus anticoagulant in COVID-19. Archives of Cardiovascular Diseases Supplements 2022. [PMCID: PMC8710966 DOI: 10.1016/j.acvdsp.2021.10.002] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Introduction Purpose Methods Results Conclusions
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Trimaille A, Matsushita K, Marchandot B, Carmona A, Hess S, Kibler M, Heger J, Reydel A, Sattler L, Grunebaum L, Jesel L, Ohlmann P, Morel O. Baseline mean platelet volume is a strong predictor of major and life-threatening bleedings after transcatheter aortic valve replacement. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2021.09.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Matsushita K, Marchandot B, Hess S, Kibler M, Sato C, Heger J, Truong DP, Trimaille A, Sattler L, Grunebaum L, Reydel A, Jesel L, Ohlmann P, Morel O. Primary hemostatic disorders drive early and late major bleedings of patients with atrial fibrillation after transcatheter aortic valve replacement. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1631] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Patients with atrial fibrillation (AF) are likely to have multiple co-morbidities and receive anticoagulants after TAVR, which lead to a poor prognosis including bleeding events. Closure time adenosine diphosphate (CT-ADP) is a primary hemostasis point-of-care test used as a surrogate marker of high molecular weight (HMW) multimers defect of Von Willebrand factor (VWF). Our prior studies suggest that prolongation of CT-ADP (>180 seconds) after TAVR is a major determinant of early and late major/life-threatening bleeding complications (MLBCs).
Purpose
To evaluate the impact of post-procedural CT-ADP >180sec on bleeding events in AF patients.
Methods
We included 878 patients from our prospective TAVR registry between 2010 and 2019. Bleeding complications were assessed according to the VARC-2 (Valve Academic Research Consortium-2) criteria. Major adverse cardiac and cerebrovascular events (MACCE) was defined as a composite of all-cause death, myocardial infarction, stroke, and heart failure hospitalization within 1-year after TAVR. Ongoing primary haemostasis disorder was defined by post-procedure CT-ADP >180sec. Primary endpoint was the occurrence of MLBCs during the first year and the second endpoint was 1-year MACCE.
Results
Patients with AF had a higher incidence of all-cause mortality (15% vs. 8%, p=0.002), MACCE (29% vs. 20%, p=0.002), and MLBCs (20% vs. 12%, p=0.001) within 1-year compared to non-AF patients. When the cohort was split into 4 subgroups according to AF and CT-ADP >180sec, patients with AF and CT-ADP >180sec had the highest risk of MLBCs (log-rank test; p<0.001) (Figure). Multivariate Cox regression analysis confirmed that the patients with AF and CT-ADP >180sec had 4.6-fold higher risk of MLBCs within 1 year compared to non-AF patients with CT-ADP ≤180sec (hazard ratio: 4.60; 95% confidence interval: 2.18 - 9.68; p<0.001).
Conclusion
Among TAVR patients, AF with post-procedural CT-ADP >180 sec was identified as a strong independent predictor of MLBCs at 1-year follow-up. Our study suggest that persistent primary haemostasis disorders contribute to a higher risk of bleeding events particularly in AF patients and may be considered for a tailored and risk-adjusted antithrombotic therapy after TAVR.
Funding Acknowledgement
Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): Dr Matsushita received a grant from Edwards Lifesciences.
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Affiliation(s)
- K Matsushita
- University Hospital of Strasbourg, Strasbourg, France
| | - B Marchandot
- University Hospital of Strasbourg, Strasbourg, France
| | - S Hess
- University Hospital of Strasbourg, Strasbourg, France
| | - M Kibler
- University Hospital of Strasbourg, Strasbourg, France
| | - C Sato
- University Hospital of Strasbourg, Strasbourg, France
| | - J Heger
- University Hospital of Strasbourg, Strasbourg, France
| | - D P Truong
- University Hospital of Strasbourg, Strasbourg, France
| | - A Trimaille
- University Hospital of Strasbourg, Strasbourg, France
| | - L Sattler
- University Hospital of Strasbourg, Strasbourg, France
| | - L Grunebaum
- University Hospital of Strasbourg, Strasbourg, France
| | - A Reydel
- University Hospital of Strasbourg, Strasbourg, France
| | - L Jesel
- University Hospital of Strasbourg, Strasbourg, France
| | - P Ohlmann
- University Hospital of Strasbourg, Strasbourg, France
| | - O Morel
- University Hospital of Strasbourg, Strasbourg, France
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Trimaille A, Curtiaud A, Marchandot B, Matsushita K, Sato C, Leonard-Lorant I, Sattler L, Grunebaum L, Ohana M, Von Hunolstein J, Andres E, Goichot B, Danion F, Kaeuffer C, Poindron V, Ohlmann P, Jesel L, Morel O. Venous thromboembolism in non-critically ill patients with COVID-19 infection. Archives of Cardiovascular Diseases Supplements 2021. [PMCID: PMC7803092 DOI: 10.1016/j.acvdsp.2020.10.138] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Background Systemic coagulation activation and thrombotic complications are frequent among critically ill patients with COVID-19. Limited data are available in non-intensive care unit (ICU) patients. Purpose To determine the incidence, risk factors and prognosis of venous thromboembolism (VTE) in non-ICU COVID-19 patients. Methods We studied consecutive COVID-19 patients admitted to general ward at Strasbourg Hospital, France (25.02.2020–19.04.2020). The primary outcome was any VTE complication. The secondary outcome was the composite of death or transfer to ICU. Results Among the 289 patients included (62.2 ± 17.0 years, 59.2% male), VTE occurred in 49 (17.0%). Padua prediction score for VTE was similar between VTE and non-VTE patients. VTE imaging tests were performed in 100 (34.6%) patients and VTE diagnosed in median 7 (3–11) days after admission. On-admission, time from symptom onset to admission (OR 1.07, CI 95% [1.00–1.16], P = 0.045), Improve score (OR 1.37, [1.02–1.83], P = 0.032), leukocyte count (OR 1.16, [1.06–1.27], P = 0.001) and lack of thromboprophylaxis (OR 27.85, CI 95% [9.35–82.95], P < 0.001) were independent predictors of VTE. The incidence of the composite of death or ICU transfer was 31.0% and more frequent among patients with VTE (47.9% vs. 27.9%, P = 0.01). Fever (OR 5.37, CI 95% [1.44–19.97], P = 0.012), VTE (OR 3.44, CI 95% [1.63–7.25], P = 0.001), lymphopenia (OR 0.32, 95% CI [0.15–0.71]; P = 0.005) and extent of COVID-19 evaluated by chest CT severity (OR 1.56, 95% CI [1.12–2.16]; P = 0.007) were independently associated with in-hospital death or transfer to ICU (Table 1, Fig. 1). Conclusions The 17.0% incidence of VTE in non-ICU patients with COVID-19 was associated with worse outcomes. Given the high incidence of VTE in ward patients, there is an urgent need to investigate the optimal anticoagulation regimen.
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Abstract
BACKGROUND General practitioners play a vital and increasing part in the perioperative care of patients undergoing total knee replacement (TKR). Rising obesity rates, sports-related injuries and an ageing population are likely to result in a sharp increase in TKR procedures within the next decade, combined with higher cost concerns. Rehabilitation practices that show economic efficiency and produce superior patient outcomes are a major focus of current research. OBJECTIVE The aim of this article is to provide an evidence-based summary of current rapid recovery protocols following TKR surgery. DISCUSSION Rapid recovery protocols have been shown to be effective at reducing length of stay, postoperative pain and complications without compromising patient safety. These rapid recovery protocols include same-day mobilisation; blood preservation protocols; self-directed pedalling-based rehabilitation; and individualised targeted discharge to self-directed, outpatient therapist-directed or inpatient therapist-directed rehabilitation. Low-cost self-directed rehabilitation should be considered usual care, with inpatient rehabilitation reserved for the minority of at-risk patients.
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Affiliation(s)
- Larissa Sattler
- MPhtySt, Assistant Professor, Physiotherapy, Faculty of Health Sciences @ Medicine, Bond University, Qld
| | - Wayne Hing
- PhD, Head of Physiotherapy, Faculty of Health Sciences and Medicine, Bond University, Qld
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Sattler L, Hing W, Rathbone E, Vertullo C. Intrinsic patient factors predictive of inpatient rehabilitation facility discharge following primary total knee arthroplasty: a systematic review and meta-analysis. BMC Musculoskelet Disord 2020; 21:481. [PMID: 32698823 PMCID: PMC7376636 DOI: 10.1186/s12891-020-03499-5] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 07/13/2020] [Indexed: 01/16/2023] Open
Abstract
Background Total Knee Arthroplasty (TKA) reduces pain and improves function in those suffering from severe osteoarthritis. A significant cost of TKA is post-acute care, however, current evidence suggests that discharge to an Inpatient Rehabilitation Facility (IRF) has inferior outcomes to home discharge, with no greater benefit in physical function. Only individual studies have investigated TKA patient characteristics predictive of discharge destination, therefore, the aim is to systematically review the literature and meta-analyse intrinsic patient factors predictive of IRF discharge. If predictive factors are known, then early discharge planning and intervention strategies could be implemented. Methods Databases PubMed, CINAHL, Embase, Cochrane, and Pedro were searched up to October 2019 for all studies investigating pre-operative intrinsic patient factors predictive of IRF discharge. For assessing the methodological quality of included studies, the Quality In Prognosis Studies (QUIPS) tool was used. Statistical analysis and graphical reporting were conducted in R statistical software. To assess the effect of predictors of discharge destination, odds ratios with the corresponding 95%CI were extracted from the results of univariate and multivariable analyses. Results A total of 9 articles published between 2011 to 2018 with 218,151 TKA patients were included. Of the 13 intrinsic patient factors reported, 6 met the criteria for synthesised review: age, obesity, comorbidity, gender, SF-12/VR-12 survey, and smoking. Due to the heterogeneity of statistical analysis and reporting 2 variables could undergo meta-analysis, gender and smoking. Female gender increased the likelihood of IRF discharge by 78% (OR = 1.78; 95%CI = 1.43–2.20; I2 = 33.3%), however, the relationship between smoking status and discharge destination was less certain (OR = 0.80; 95%CI = 0.42–1.50; I2 = 68.5%). Conclusion In this systematic literature review and meta-analysis female gender was shown to be predictive of IRF discharge after total knee arthroplasty. There was also a trend for those of older age and increased comorbidity, as measured by the Charlson Comorbidity Index, or the severely obese to have an increased likelihood of IRF discharge. The marked heterogeneity of statistical methods and reporting in existing literature made pooled analysis challenging for intrinsic patient factors predictive of IRF discharge after TKA. Further, high quality studies of prospective design on predictive factors are warranted, to enable early discharge planning and optimise resource allocation on post-acute care following TKA. Trial registration This review was registered with PROSPERO (CRD42019134422).
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Affiliation(s)
- Larissa Sattler
- Bond University, Bond Institute of Health and Sport, Promethean Way, Robina, QLD, 4226, Australia.
| | - Wayne Hing
- Bond University, Bond Institute of Health and Sport, Promethean Way, Robina, QLD, 4226, Australia
| | - Evelyne Rathbone
- Bond University, Bond Institute of Health and Sport, Promethean Way, Robina, QLD, 4226, Australia
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Delhorme JB, Sattler L, Severac F, Triki E, Gross I, Romain B, Rohr S, Grunebaum L, Brigand C. Prognostic factors of hemorrhagic complications after oxaliplatin-based hyperthermic intraperitoneal chemotherapy: Toward routine preoperative dosage of Von Willebrand factor? Eur J Surg Oncol 2017; 43:1095-1101. [PMID: 28209329 DOI: 10.1016/j.ejso.2017.01.015] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/30/2016] [Accepted: 01/24/2017] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Oxaliplatin-based hyperthermic intraperitoneal chemotherapy (HIPEC-ox) induces specific morbidity with hemorrhagic complications (HC). The aim of this study was to identify preoperative, intraoperative and postoperative HC predictive factors after HIPEC-ox. METHODS A prospective single center study that included all consecutive patients treated with curative-intent HIPEC-ox, whatever the origin of peritoneal disease, was conducted. All patients underwent systematic blood tests exploring primary hemostasis and endothelial activation before surgical incision (D0) and on postoperative days 2 (POD2) and 5 (POD5). RESULTS Between May 2012 and August 2015, 47 patients were enrolled in the study. The overall HC rate was 38%. Major morbidity was significantly higher in patients with HC. Patients presenting HC were significantly more often affected with pseudomyxoma peritonei and had less preoperative chemotherapy. Multivariate analysis showed that a higher plasmatic level of Von Willebrand factor antigen at D0 (D0 VWF:Ag) was a protective predictive factor for HC (p = 0.049, HR: 0.97 CI 95% [0.94-1.00]). A D0 VWF:Ag level below 138% had a sensitivity of 87.5%, a specificity of 67% and an area under the curve of 80.3% (CI 95% [66.5-94], p < 0.01) for predicting HC. CONCLUSIONS Through the identification of prognostic factors, this study highlighted a subgroup of patients with low risk of HC after HIPEC-ox. Based on these results, we propose a routine preoperative dosage of VWF that would help the surgeon to select the most suitable patients for HIPEC-ox.
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Affiliation(s)
- J-B Delhorme
- Department of General and Digestive Surgery, Hautepierre Hospital, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France; INSERM UMR_S1113, Université de Strasbourg, FMTS, 3 avenue Molière, 67200, Strasbourg, France.
| | - L Sattler
- Biological Hematology Laboratory, Hemostasis Unit, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France
| | - F Severac
- Department of Public Health, Strasbourg University Hospital, 1 place de l'hôpital BP426, 67091, Strasbourg, France
| | - E Triki
- Department of General and Digestive Surgery, Hautepierre Hospital, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France
| | - I Gross
- INSERM UMR_S1113, Université de Strasbourg, FMTS, 3 avenue Molière, 67200, Strasbourg, France
| | - B Romain
- Department of General and Digestive Surgery, Hautepierre Hospital, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France
| | - S Rohr
- Department of General and Digestive Surgery, Hautepierre Hospital, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France
| | - L Grunebaum
- Biological Hematology Laboratory, Hemostasis Unit, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France
| | - C Brigand
- Department of General and Digestive Surgery, Hautepierre Hospital, Strasbourg University Hospital, 2 avenue Molière, 67200, Strasbourg, France
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Sattler L, Sabou M, Waller J, Candolfi E, Candolfi E. À propos d’un cas de sinusite maxillaire à Scopulariopsis brevicaulis chez une patiente immunocompétente. J Mycol Med 2013. [DOI: 10.1016/j.mycmed.2013.07.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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O'Carroll D, Scherthan H, Peters AH, Opravil S, Haynes AR, Laible G, Rea S, Schmid M, Lebersorger A, Jerratsch M, Sattler L, Mattei MG, Denny P, Brown SD, Schweizer D, Jenuwein T. Isolation and characterization of Suv39h2, a second histone H3 methyltransferase gene that displays testis-specific expression. Mol Cell Biol 2000; 20:9423-33. [PMID: 11094092 PMCID: PMC102198 DOI: 10.1128/mcb.20.24.9423-9433.2000] [Citation(s) in RCA: 222] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Higher-order chromatin has been implicated in epigenetic gene control and in the functional organization of chromosomes. We have recently discovered mouse (Suv39h1) and human (SUV39H1) histone H3 lysine 9-selective methyltransferases (Suv39h HMTases) and shown that they modulate chromatin dynamics in somatic cells. We describe here the isolation, chromosomal assignment, and characterization of a second murine gene, Suv39h2. Like Suv39h1, Suv39h2 encodes an H3 HMTase that shares 59% identity with Suv39h1 but which differs by the presence of a highly basic N terminus. Using fluorescent in situ hybridization and haplotype analysis, the Suv39h2 locus was mapped to the subcentromeric region of mouse chromosome 2, whereas the Suv39h1 locus resides at the tip of the mouse X chromosome. Notably, although both Suv39h loci display overlapping expression profiles during mouse embryogenesis, Suv39h2 transcripts remain specifically expressed in adult testes. Immunolocalization of Suv39h2 protein during spermatogenesis indicates enriched distribution at the heterochromatin from the leptotene to the round spermatid stage. Moreover, Suv39h2 specifically accumulates with chromatin of the sex chromosomes (XY body) which undergo transcriptional silencing during the first meiotic prophase. These data are consistent with redundant enzymatic roles for Suv39h1 and Suv39h2 during mouse development and suggest an additional function of the Suv39h2 HMTase in organizing meiotic heterochromatin that may even impart an epigenetic imprint to the male germ line.
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Affiliation(s)
- D O'Carroll
- Research Institute of Molecular Pathology at The Vienna Biocenter, University of Vienna, A-1030 Vienna, Austria
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Voncken JW, Schweizer D, Aagaard L, Sattler L, Jantsch MF, van Lohuizen M. Chromatin-association of the Polycomb group protein BMI1 is cell cycle-regulated and correlates with its phosphorylation status. J Cell Sci 1999; 112 ( Pt 24):4627-39. [PMID: 10574711 DOI: 10.1242/jcs.112.24.4627] [Citation(s) in RCA: 119] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The human proto-oncogene Bmi1 is a member of the mammalian Polycomb Group (Pc-G) genes. The subnuclear distribution of the BMI1 protein was studied in several primary human and tumor-derived cell lines using immunohistochemical and biochemical methods. In primary and tumor cells, nuclear BMI1 shows a fine-grain distribution over chromatin, usually dense in interphase nuclei and significantly weaker along mitotic chromosomes. In addition, BMI1 preferentially associates with several distinct heterochromatic domains in tumor cell lines. In both primary and tumor cell lines a marked cell cycle-regulation of Pc-G-chromatin interaction is observed: nuclear BMI1-staining dissipates in late S phase and is re-established early in G(1)-phase. Chromatin-association of BMI1 inversely correlates with its phosphorylation status in a cell cycle-dependent fashion: at G(1)/S, hypophosphorylated BMI1 is specifically retained in the chromatin-associated nuclear protein fraction, whereas during G(2)/M, phosphorylated BMI1 is not chromatin-bound. Our findings indicate a strict cell cycle-controlled regulation of Pc-G complex-chromatin association and provide molecular tools for improving our understanding of Pc-G complex regulation and function in mammalian cells.
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Affiliation(s)
- J W Voncken
- The Netherlands Cancer Institute, Division of Molecular Carcinogenesis, NL-1066 CX Amsterdam, The Netherlands
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Abstract
Physicians and staff in the endoscopy unit are seeing an increasing number of patients who are human immunodeficiency virus positive or who have acquired immunodeficiency syndrome. Despite the practice of universal precautions, exposure can occur very easily. It happened to me. This article describes some of the details of my experience in the hope that it will increase awareness and promote the use of better precautions in all hospital settings.
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Abstract
The history and current status of home total parenteral nutrition are reviewed. Patients without a functional intestinal tract are able to lead a relatively normal life, infusing their essential nutrients through a Silastic central venous catheter while they sleep at night. The average catheter life is nine months. Suspected sepsis and obstruction of the catheter were the leading causes for catheter removal.
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Sattler L. Confabulation in Korsakoff's psychosis. Comment on the report by Keller and Efron. J Stud Alcohol 1976; 37:1010-3. [PMID: 972536 DOI: 10.15288/jsa.1976.37.1010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Zerban FW, Sattler L. Unfermentable Reducing Substances in Molasses. Science 1942; 95:647-8. [PMID: 17819583 DOI: 10.1126/science.95.2478.647] [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: 11/02/2022]
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21
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Zerban FW, Sattler L, Lorge J, Saywell LG, Phillips EP, Waentig P, Auerbach F, Bodl�nder E, Browne CA, Balch RT, Saillard E, Marshall CR, Norman AG, Voorst FT, Voogt WJ, Davis WA, Z�ch C, Stieglitz CRV, Home LC, Tryller H, Hamous J, Kudelja NN, Mussolin K. Zucker. Anal Bioanal Chem 1940. [DOI: 10.1007/bf01548734] [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: 10/25/2022]
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22
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Sattler L, Zerban FW. TYNDALL BEAM INTENSITY OF TURBID COLORED SOLUTIONS. Science 1931; 73:641. [PMID: 17814361 DOI: 10.1126/science.73.1902.641] [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: 11/02/2022]
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