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50 result(s) for "Seifert, Christian L."
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Fatal Encephalitic Borna Disease Virus 1 in Solid-Organ Transplant Recipients
Evidence of Borna disease virus 1 infection in humans is limited; in this report, donor-derived Borna virus encephalitis is shown to occur in three solid-organ transplant recipients.
Depressive Symptoms and the Risk of Ischemic Stroke in the Elderly—Influence of Age and Sex
Although a relationship between depression and cardiovascular events has been suggested, past study results regarding the risk of stroke in relation to depression by subgroups are ambiguous. The aim of this study was to investigate the influence of depressive symptoms on risk of incident ischemic stroke in elderly according to age and sex. This prospective cohort study followed up 3852 subjects older than 55 years. Baseline depressive symptoms were defined by a score ≥ 5 on the Geriatric Depression Scale or antidepressant intake. The outcome measure was incident ischemic stroke within 6 years of follow-up. Multivariate Cox-proportional hazard models as well as cumulative survival analyses were computed. A total of 156 ischemic strokes occurred during the study period (24 strokes in the age-group<65 years and 132 strokes in the age-group ≥ 65 years). The distribution of strokes in sex-subgroups was 4.5% in men and 3.7% in women. The multivariate analysis showed an elevated stroke risk (Hazard Ratio (HR): 2.84, 95% CI 1.11-7.29, p = 0.030) in subjects from 55 to 64 years with depressive symptoms at baseline but not in subjects older than 65 years. In the multivariate analysis according to sex the risk was increased in women (HR: 1.62, 95% CI 1.02-2.57, P = 0.043) but not in men. The Cox-regression model for interaction showed a significant interaction between age and sex (HR: 3.24, 95% CI 1.21-8.69, P = 0.020). This study corroborates that depressive symptoms pose an important risk for ischemic stroke, which is particularly remarkable in women and patients younger than 65 years.
Mobilization of CD133+ Progenitor Cells in Patients with Acute Cerebral Infarction
Progenitor cells (PCs) contribute to the endogenous repair mechanism after ischemic events. Interleukin-8 (IL-8) as part of the acute inflammatory reaction may enhance PC mobilization. Also, statins are supposed to alter number and function of circulating PCs. We aimed to investigate PC mobilization after acute ischemic stroke as well as its association with inflammatory markers and statin therapy. Sixty-five patients with ischemic stroke were enrolled in the study. The number of CD133+ PCs was analyzed by flow cytometry. Blood samples were drawn within 24 hours after symptom onset and after 5 days. The number of CD133+ PCs increased significantly within 5 days (p<0.001). We found no correlation between CD133+ PCs and the serum levels of IL-8, IL-6, or C-reactive protein (CRP). Multivariate analysis revealed that preexisting statin therapy correlated independently with the increase of CD133+ PCs (p=0.001). This study showed a mobilization of CD133+ PCs in patients with acute cerebral infarction within 5 days after symptom onset. The early systemic inflammatory response did not seem to be a decisive factor in the mobilization of PCs. Preexisting statin therapy was associated with the increase in CD133+ PCs, suggesting a potentially beneficial effect of statin therapy in patients with stroke.
A support programme for secondary prevention in patients with transient ischaemic attack and minor stroke (INSPiRE-TMS): an open-label, randomised controlled trial
Patients with recent stroke or transient ischaemic attack are at high risk for a further vascular event, possibly leading to permanent disability or death. Although evidence-based treatments for secondary prevention are available, many patients do not achieve recommended behavioural modifications and pharmaceutical prevention targets in the long-term. We aimed to investigate whether a support programme for enhanced secondary prevention can reduce the frequency of recurrent vascular events. INSPiRE-TMS was an open-label, multicentre, international randomised controlled trial done at seven German hospitals with acute stroke units and a Danish stroke centre. Patients with non-disabling stroke or transient ischaemic attack within 2 weeks from study enrolment and at least one modifiable risk factor (ie, arterial hypertension, diabetes, atrial fibrillation, or smoking) were included. Computerised randomisation was used to allocate patients (1:1) either to the support programme in addition to conventional care or to conventional care alone. The support programme used feedback and motivational interviewing strategies with eight outpatient visits over 2 years aiming to improve adherence to secondary prevention targets. The primary outcome was the composite of major vascular events consisting of stroke, acute coronary syndrome, and vascular death, assessed in the intention-to-treat population (all patients who underwent randomisation, did not withdraw study participation, and had at least one follow-up). Outcomes were assessed at annual follow-ups using time-to-first-event analysis. All-cause death was monitored as a safety outcome. This trial is registered with ClinicalTrials.gov, NCT01586702. From Aug 22, 2011, to Oct 30, 2017, we enrolled 2098 patients. Of those, 1048 (50·0%) were randomly assigned to the support programme group and 1050 (50·0%) patients were assigned to the conventional care group. 1030 (98·3%) patients in the support group and 1042 (99·2%) patients in the conventional care group were included in the intention-to-treat analysis. The mean age of analysed participants was 67·4 years and 700 (34%) were women. After a mean follow-up of 3·6 years, the primary outcome of major vascular events had occurred in 163 (15·8%) of 1030 patients of the support programme group and in 175 (16·8%) of 1042 patients of the conventional care group (hazard ratio [HR] 0·92, 95% CI 0·75–1·14). Total major vascular event numbers were 209 for the support programme group and 225 for the conventional care group (incidence rate ratio 0·93, 95% CI 0·77–1·12; p=0·46) and all-cause death occurred in 73 (7·1%) patients in the support programme group and 85 (8·2%) patients in the conventional care group (HR 0·85, 0·62–1·17). More patients in the support programme group achieved secondary prevention targets (eg, in 1-year-follow-up 52% vs 42% [p<0·0001] for blood pressure, 62% vs 54% [p=0·0010] for LDL, 33% vs 19% [p<0·0001] for physical activity, and 51% vs 34% [p=0·0010] for smoking cessation). Provision of an intensified secondary prevention programme in patients with non-disabling stroke or transient ischaemic attack was associated with improved achievement of secondary prevention targets but did not lead to a significantly lower rate of major vascular events. Further research is needed to investigate the effects of support programmes in selected patients who do not achieve secondary prevention targets soon after discharge. German Federal Ministry of Education and Research, Pfizer, and German Stroke Foundation.
Influence of the initial level of consciousness on early, goal-directed mobilization: a post hoc analysis
Purpose Early mobilization within 72 h of intensive care unit (ICU) admission improves functional status at hospital discharge. We aimed to assess the effectiveness of early, goal-directed mobilization in critically ill patients across a broad spectrum of initial consciousness levels. Methods Post hoc analysis of the international, randomized, controlled, outcome-assessor blinded SOMS trial conducted 2011–2015. Randomization was stratified according to the immediate post-injury Glasgow Coma Scale (GCS) (≤ 8 or > 8). Patients received either SOMS-guided mobility treatment with a facilitator or standard care. We used general linear models to test the hypothesis that immediate post-randomization GCS modulates the intervention effects on functional independence at hospital discharge. Results Two hundred patients were included in the intention-to-treat analysis. The significant effect of early, goal-directed mobilization was consistent across levels of GCS without evidence of effect modification, for the primary outcome functional independence at hospital discharge ( p  = 0.53 for interaction), as well as average achieved mobility level during ICU stay (mean achieved SOMS level) and functional status at hospital discharge measured with the functional independence measure. In patients with low GCS, delay to first mobilization therapy was longer (0.7 ± 0.2 days vs. 0.2 ± 0.1 days, p  = 0.008), but early, goal-directed mobilization compared with standard care significantly increased functional independence at hospital discharge in this subgroup of patients with immediate post-randomization GCS ≤ 8 (OR 3.67; 95% CI 1.02–13.14; p  = 0.046). Conclusion This post hoc analysis of a randomized controlled trial suggests that early, goal-directed mobilization in patients with an impaired initial conscious state (GCS ≤ 8) is not harmful but effective.
Reduced volume of the nucleus accumbens in heroin addiction
The neural mechanisms of heroin addiction are still incompletely understood, even though modern neuroimaging techniques offer insights into disease-related changes in vivo. While changes on cortical structure have been reported in heroin addiction, evidence from subcortical areas remains underrepresented. Functional imaging studies revealed that the brain reward system and particularly the nucleus accumbens (NAcc) play a pivotal role in the pathophysiology of drug addiction. The aim of this study was to investigate whether there was a volume difference of the NAcc in heroin addiction in comparison to healthy controls. A further aim was to correlate subcortical volumes with clinical measurements on negative affects in addiction. Thirty heroin-dependent patients under maintenance treatment with diacetylmorphine and twenty healthy controls underwent structural MRI scanning at 3T. Subcortical segmentation analysis was performed using FMRIB’s Integrated Registration and Segmentation Tool function of FSL. The State–Trait Anxiety Inventory and the Beck Depression Inventory were used to assess trait anxiety and depressive symptoms, respectively. A decreased volume of the left NAcc was observed in heroin-dependent patients compared to healthy controls. Depression score was negatively correlated with left NAcc volume in patients, whereas a positive correlation was found between the daily opioid dose and the volume of the right amygdala. This study indicates that there might be structural differences of the NAcc in heroin-dependent patients in comparison with healthy controls. Furthermore, correlations of subcortical structures with negative emotions and opioid doses might be of future relevance for the investigation of heroin addiction.
Clinical associations of T2-weighted lesion load and lesion location in small vessel disease: Insights from a large prospective cohort study
Subcortical T2-weighted (T2w) lesions are very common in older adults and have been associated with dementia. However, little is known about the strategic lesion distribution and how lesion patterns relate to vascular risk factors and cognitive impairment. The aim of this study was to analyze the association between T2w lesion load and location, vascular risk factors, and cognitive impairment in a large cohort of older adults. 1017 patients participating in a large prospective cohort study (INtervention project on cerebroVAscular disease and Dementia in the district of Ebersberg, INVADE II) were analyzed. Cerebral T2w white matter and deep grey matter lesions, the so-called white matter hyperintensities (WMHs), were outlined semi-automatically on fluid attenuated inversion recovery images and normalized to standard stereotaxic space (MNI152) by non-linear registration. Patients were assigned to either a low-risk or a high-risk group. The risk assessment considered ankle brachial index, intima media thickness, carotid artery stenosis, atrial fibrillation, previous cerebro-/cardiovascular events and peripheral artery disease as well as a score based on cholesterol levels, blood pressure and smoking. Separate lesion distributions were obtained for the two risk groups and compared using voxel-based lesion-symptom mapping. Moreover, we assessed the relation between lesion location and cognitive impairment (demographically adjusted z-scores of the Consortium to Establish a Registry for Alzheimer's Disease Neuropsychological Assessment Battery Plus, CERAD-NAB Plus) using voxel-based statistics (α = 0.05). A total of 878 out of 1017 subjects (86%) had evaluable MRI data and were included in the analyses (mean age: 68.2 ± 7.6 years, female: 515). Patients in the high-risk group were characterized by a significantly higher age, a higher proportion of men, a higher lesion load (p < 0.001), and a worse performance in some of the cognitive subdomain scores (p < 0.05). Voxels with significant associations to the subjects' cerebrovascular risk profiles were mainly found at locations of the corpus callosum, superior corona radiata, superior longitudinal fasciculus, internal and external capsule, and putamen. While several cognitive domains have shown significant associations with the participants’ total lesion burden (p < 0.05), no focal WMH locations were found to be associated with cognitive impairment. Age, gender, several cognitive scores, and WMH lesion load were shown to be significantly associated with vascular risk factors in a population of older, but cognitively preserved adults. Vascular risk factors seem to promote lesion formation most severely at well-defined locations. While lesion load showed weak associations to some cognitive scores, no focal locations causing specific cognitive disturbances were identified in this large cohort of older adults. •Study of association between T2w lesion load and location, vascular risk factors, cognition.•Increased vascular risk reflected in higher age, proportion of men, lesion load, cognitive disturbances.•Periventricular lesions significantly associated with vascular risk factors.•Total lesion burden but not focal locations partially explain cognitive disturbances.
Systemic thrombolysis in anterior spinal artery syndrome: what has to be considered?
Anterior spinal artery syndrome (ASAS) often leads to complete motor paralysis with poor clinical outcome. There is a lack of controlled clinical trials on acute treatment strategies in ASAS. However, systemic thrombolysis with recombinant tissue-plasminogen activator (rt-PA) might be a useful therapeutic option in ASAS. We report the management of a patient with ASAS below thoracic level 10, who was treated with intravenous thrombolysis. An 81 year old patient presented with flaccid paraplegia. After exclusion of aortal dissection, spinal tumour or haemorrhage, the patient was treated with intravenous rt-PA 3 h 40 min after symptom onset. The follow up magnetic resonance imaging (MRI) showed spinal infarction below thoracic segment 10. In the clinical course, the patient partially recovered lower limb muscle strength and was able to walk with assistance. To the best of our knowledge, this is the first case in the literature of ASAS with MRI-proven spinal ischemia and the application of rt-PA. Systemic thrombolysis seems to be justifiable in patients with ASAS after the rule-out of aortal dissection and spinal bleeding.
Favourable response to plasma exchange in tumefactive CNS demyelination with delayed B-cell response
We report a case of multiple sclerosis-associated fulminant tumefactive demyelinating lesion (TDL) with the special feature of delayed humoral immune response. Plasma exchange (PE) yielded significant benefit in two consecutive steroid-unresponsive relapses, while signs of an intrathecal B-cell response were only present 2 years later at the second relapse. Remission was achieved and sustained thereafter with natalizumab. Our case indicates that PE might be a therapeutic option even when the B-cell response is not fully developed. This delay in the development of a humoral immune response may reflect the step-wise B-cell colonization of the CNS and represent an attractive therapeutic window of opportunity.