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result(s) for
"Martin, Claes"
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Servant and authoritarian leadership, and leaders’ third-party conflict behavior in convents
by
Aaldering, Hillie
,
Euwema, Martin Claes
,
Obi, Innocentina-Marie
in
Authoritarianism
,
Behavior
,
Behavior problems
2021
Purpose
The present study investigates the relationship between servant and authoritarian leadership, and leaders’ third-party conflict behaviors in followers’ conflicts, thereby contributing to integrating knowledge on leadership styles and leaders’ third-party conflict behaviors. This study aims to investigate leadership and conflict management in a context hardly studied: local religious communities or convents within a female religious organization.
Design/methodology/approach
The authors collected quantitative survey data from 453 religious sisters, measuring their perception of leaders’ behaviors. These religious sisters live in local religious communities within a Catholic Women Religious Institute based in Nigeria (West Africa) and in other countries across the globe.
Findings
Results show that servant leadership relates positively to leaders’ third-party problem-solving behavior and negatively to leaders’ avoiding and forcing. Moreover, authoritarian leadership relates positively to leaders’ third-party avoiding and forcing behaviors.
Originality/value
This study expands theory development and practices on leadership and leaders’ third-party conflict behaviors. The authors associate servant and authoritarian leadership with leaders’ third-party conflict behaviors: avoiding, forcing and problem-solving, in followers’ conflicts. The authors offer practical recommendations for religious leaders on servant leadership and leaders’ third-party conflict behaviors.
Journal Article
RebiQoL: A randomized trial of telemedicine patient support program for health-related quality of life and adherence in people with MS treated with Rebif
by
Haghighi, Sara
,
Jansson, Lillemor
,
Fredrikson, Sten
in
Activities of daily living
,
Adolescent
,
Adult
2019
RebiQoL was a phase IV multicenter randomized study to assess the impact of a telemedicine patient support program (MSP) on health-related quality of life (HRQoL) in patients with relapsing-remitting MS (RRMS) being administered with Rebif with the RebiSmart device. The primary endpoint was to assess the impact of MSP compared to patients only receiving technical support for RebiSmart on HRQoL at 12 months, using the psychological part of Multiple Sclerosis Impact Scale (MSIS-29), in patients administered with Rebif. A total of 97 patients diagnosed with RRMS were screened for participation in the study of which 3 patients did not fulfill the eligibility criteria and 1 patient withdrew consent. Of the 93 randomized patients, 46 were randomized to MSP and 47 to Technical support only. The demographic characteristics of the patients were well-balanced in the two arms. There were no statistical differences (linear mixed model) in any of the primary (difference of 0.48, 95% CI: -8.30-9.25, p = 0.91) or secondary outcomes (p>0.05). Although the study was slightly underpowered, there was a trend towards better adherence in the MSP group (OR 3.5, 95% CI 0.85-14.40, p = 0.08) although not statistically significant. No unexpected adverse events occurred. This study did not show a statistically significant effect of the particular form of teleintervention used in this study on HRQoL as compared to pure technical support, for MS patients already receiving Rebif with the RebiSmart device. Trial Registration: ClinicalTrials.gov: NCT01791244.
Journal Article
Effect of natalizumab on disease progression in secondary progressive multiple sclerosis (ASCEND): a phase 3, randomised, double-blind, placebo-controlled trial with an open-label extension
2018
Although several disease-modifying treatments are available for relapsing multiple sclerosis, treatment effects have been more modest in progressive multiple sclerosis and have been observed particularly in actively relapsing subgroups or those with lesion activity on imaging. We sought to assess whether natalizumab slows disease progression in secondary progressive multiple sclerosis, independent of relapses.
ASCEND was a phase 3, randomised, double-blind, placebo-controlled trial (part 1) with an optional 2 year open-label extension (part 2). Enrolled patients aged 18–58 years were natalizumab-naive and had secondary progressive multiple sclerosis for 2 years or more, disability progression unrelated to relapses in the previous year, and Expanded Disability Status Scale (EDSS) scores of 3·0–6·5. In part 1, patients from 163 sites in 17 countries were randomly assigned (1:1) to receive 300 mg intravenous natalizumab or placebo every 4 weeks for 2 years. Patients were stratified by site and by EDSS score (3·0–5·5 vs 6·0–6·5). Patients completing part 1 could enrol in part 2, in which all patients received natalizumab every 4 weeks until the end of the study. Throughout both parts, patients and staff were masked to the treatment received in part 1. The primary outcome in part 1 was the proportion of patients with sustained disability progression, assessed by one or more of three measures: the EDSS, Timed 25-Foot Walk (T25FW), and 9-Hole Peg Test (9HPT). The primary outcome in part 2 was the incidence of adverse events and serious adverse events. Efficacy and safety analyses were done in the intention-to-treat population. This trial is registered with ClinicalTrials.gov, number NCT01416181.
Between Sept 13, 2011, and July 16, 2015, 889 patients were randomly assigned (n=440 to the natalizumab group, n=449 to the placebo group). In part 1, 195 (44%) of 439 natalizumab-treated patients and 214 (48%) of 448 placebo-treated patients had confirmed disability progression (odds ratio [OR] 0·86; 95% CI 0·66–1·13; p=0·287). No treatment effect was observed on the EDSS (OR 1·06, 95% CI 0·74–1·53; nominal p=0·753) or the T25FW (0·98, 0·74–1·30; nominal p=0·914) components of the primary outcome. However, natalizumab treatment reduced 9HPT progression (OR 0·56, 95% CI 0·40–0·80; nominal p=0·001). In part 1, 100 (22%) placebo-treated and 90 (20%) natalizumab-treated patients had serious adverse events. In part 2, 291 natalizumab-continuing patients and 274 natalizumab-naive patients received natalizumab (median follow-up 160 weeks [range 108–221]). Serious adverse events occurred in 39 (13%) patients continuing natalizumab and in 24 (9%) patients initiating natalizumab. Two deaths occurred in part 1, neither of which was considered related to study treatment. No progressive multifocal leukoencephalopathy occurred.
Natalizumab treatment for secondary progressive multiple sclerosis did not reduce progression on the primary multicomponent disability endpoint in part 1, but it did reduce progression on its upper-limb component. Longer-term trials are needed to assess whether treatment of secondary progressive multiple sclerosis might produce benefits on additional disability components.
Biogen.
Journal Article
Analysis of immune-related loci identifies 48 new susceptibility variants for multiple sclerosis
by
Buck, Dorothea
,
Cusi, Daniele
,
Gourraud, Pierre-Antoine
in
631/208/205/2138
,
631/250/248
,
692/699/249/1313/1666
2013
The International Multiple Sclerosis Genetics Consortium reports the discovery of 48 new susceptibility variants for multiple sclerosis through targeted follow-up of immune-related loci. They also report fine mapping of association signals at established susceptibility loci and provide insights into the immune system processes underlying this disease.
Using the ImmunoChip custom genotyping array, we analyzed 14,498 subjects with multiple sclerosis and 24,091 healthy controls for 161,311 autosomal variants and identified 135 potentially associated regions (
P
< 1.0 × 10
−4
). In a replication phase, we combined these data with previous genome-wide association study (GWAS) data from an independent 14,802 subjects with multiple sclerosis and 26,703 healthy controls. In these 80,094 individuals of European ancestry, we identified 48 new susceptibility variants (
P
< 5.0 × 10
−8
), 3 of which we found after conditioning on previously identified variants. Thus, there are now 110 established multiple sclerosis risk variants at 103 discrete loci outside of the major histocompatibility complex. With high-resolution Bayesian fine mapping, we identified five regions where one variant accounted for more than 50% of the posterior probability of association. This study enhances the catalog of multiple sclerosis risk variants and illustrates the value of fine mapping in the resolution of GWAS signals.
Journal Article
Genetic mapping across autoimmune diseases reveals shared associations and mechanisms
by
Wijmenga, Cisca
,
Gasperi, Christiane
,
Withoff, Sebo
in
631/208/205/2138
,
631/250/249/1313
,
Agriculture
2024
Autoimmune and inflammatory diseases are polygenic disorders of the immune system. Many genomic loci harbor risk alleles for several diseases, but the limited resolution of genetic mapping prevents determining whether the same allele is responsible, indicating a shared underlying mechanism. Here, using a collection of 129,058 cases and controls across 6 diseases, we show that ~40% of overlapping associations are due to the same allele. We improve fine-mapping resolution for shared alleles twofold by combining cases and controls across diseases, allowing us to identify more expression quantitative trait loci driven by the shared alleles. The patterns indicate widespread sharing of pathogenic mechanisms but not a single global autoimmune mechanism. Our approach can be applied to any set of traits and is particularly valuable as sample collections become depleted.
Joint likelihood mapping across six autoimmune diseases identifies shared and distinct association signals and improves fine-mapping resolution at loci with shared effects, yielding insights into the underlying biological mechanisms.
Journal Article
Progressive Multifocal Leukoencephalopathy after Natalizumab Monotherapy
by
von Heijne, Anders
,
Berg, Johan
,
Major, Eugene O
in
Adult
,
Antibodies, Monoclonal - adverse effects
,
Antibodies, Monoclonal - therapeutic use
2009
This report describes progressive multifocal leukoencephalopathy in a patient who was receiving natalizumab therapy for multiple sclerosis. Plasma exchange was used to accelerate the clearance of natalizumab. Three weeks after plasma exchange, the patient's condition worsened neurologically because of the development of an immune-reconstitution inflammatory syndrome, but his condition improved after several weeks.
This report describes PML in a patient who was receiving natalizumab therapy for multiple sclerosis. Three weeks after treatment with plasma exchange, the patient's condition worsened neurologically because of the development of an immune-reconstitution inflammatory syndrome.
PML is a rare, opportunistic, demyelinating viral infection of the central nervous system caused by JC virus, a human polyomavirus. It usually occurs in patients with profound immunosuppression.
1
Natalizumab, a monoclonal antibody against α
4
integrins, reduces the extravasation of T lymphocytes, B lymphocytes, and plasma cells into the central nervous system.
2
The drug effectively decreases the number of multiple sclerosis lesions on MRI and the number of clinical relapses.
3
,
4
The use of antibodies against α
4
integrins also impairs inflammatory responses in other tissues, such as pancreatic islets and gut.
5
,
6
PML has been described in patients with . . .
Journal Article
Autologous haematopoietic stem cell transplantation for aggressive multiple sclerosis: the Swedish experience
by
Johansson, Jan-Erik
,
Isaksson, Cecilia
,
Nilsson, Petra
in
Adolescent
,
Adult
,
Brain - pathology
2014
Autologous haematopoietic stem cell transplantation (HSCT) is a viable option for treatment of aggressive multiple sclerosis (MS). No randomised controlled trial has been performed, and thus, experiences from systematic and sustained follow-up of treated patients constitute important information about safety and efficacy. In this observational study, we describe the characteristics and outcome of the Swedish patients treated with HSCT for MS.
Neurologists from the major hospitals in Sweden filled out a follow-up form with prospectively collected data. Fifty-two patients were identified in total; 48 were included in the study and evaluated for safety and side effects; 41 patients had at least 1 year of follow-up and were further analysed for clinical and radiological outcome. In this cohort, 34 patients (83%) had relapsing-remitting MS, and mean follow-up time was 47 months.
At 5 years, relapse-free survival was 87%; MRI event-free survival 85%; expanded disability status scale (EDSS) score progression-free survival 77%; and disease-free survival (no relapses, no new MRI lesions and no EDSS progression) 68%. Presence of gadolinium-enhancing lesions prior to HSCT was associated with a favourable outcome (disease-free survival 79% vs 46%, p=0.028). There was no mortality. The most common long-term side effects were herpes zoster reactivation (15%) and thyroid disease (8.4%).
HSCT is a very effective treatment of inflammatory active MS and can be performed with a high degree of safety at experienced centres.
Journal Article
Progressive Multifocal Leukoencephalopathy after Natalizumab MonotherapyBrief Report
2009
We describe progressive multifocal leukoencephalopathy (PML) caused by infection with human polyomavirus JC virus in a patient with multiple sclerosis who was treated with natalizumab. The first PML symptoms appeared after 14 monthly infusions of the drug. Magnetic resonance imaging (MRI) showed a presumed multiple sclerosis lesion, and JC virus DNA was not detected on polymerase-chain-reaction (PCR) assay of cerebrospinal fluid. The patient's symptoms worsened, and the diagnosis of PML was established with a more sensitive quantitative PCR assay after 16 infusions of natalizumab. Plasma exchange was used to accelerate clearance of natalizumab. Approximately 3 weeks after plasma exchange, an immune-reconstitution inflammatory syndrome appeared. JC virus DNA was no longer detectable on quantitative PCR assay, and the patient's symptoms improved.
Journal Article
Indinavir in cerebrospinal fluid of HIV-1-infected patients
by
Svensson, Jan-Olof
,
Sönnerborg, Anders
,
Martin, Claes
in
Antibiotics. Antiinfectious agents. Antiparasitic agents
,
Antiviral agents
,
Biological and medical sciences
1997
Stahle et al's results show that indinavir reaches the central nervous system in concentrations similar to trough plasma values.
Journal Article