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Author: Matthias W Riepe (50)


Mar
2018

Generally we tend to think that memory in daily living is complete and accurate in healthy persons. However, current memory research has revealed inconspicuous memory faults. Rarely omissions and distortions of memory are researched with tasks resembling everyday life.

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Dec
1969

Errors of omission are an established hallmark of memory impairment in Alzheimer's disease (AD). Much less is known about other memory errors in AD such as false memories.
We investigated false memories in healthy elderly controls (HC; n = 23) and patients with AD (n = 20) using real-life tasks of watching news and commercials.

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Mar
2017

Mood regulation is said to be age-specific. Negative self-statements (NST) are used to induce negative mood. However, little is known about NST in older persons and geriatric patients with major depressive disorder.

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Mar
2017

According to ICD-10 and DSM-V, symptoms of depressive disorder are considered to be equally important for severity judgment. It was the goal to investigate the weight of selected symptom complexes for severity judgment. In workaday life severity judgment results from an overall impression rather than from calculating severity in different symptom complexes, separately.

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Jul
2015

With aging of society the absolute number and the proportion of patients with cognitive deficits increase. Multiple disorders and diseases can foster cognitive impairment, e.g.

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Dec
1969

Clinical preference for factors in treatment of geriatric depression.

Neuropsychiatr Dis Treat 2015 22;11:25-31. Epub 2014 Dec 22.
Matthias W Riepe
Little is known about symptom preferences of clinical psychiatrists in the treatment of geriatric depression and preferences for avoiding adverse drug effects. Participants (board-certified psychiatrists) were recruited prior to a lecture on geriatric depression during a continuing education program. An analytic hierarchy process was performed and participants were asked for pairwise comparison of criteria guiding them in appraising therapeutic efficacy, and in avoiding toxicity and adverse events.

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Dec
1969

It was investigated whether alterations of the pupil's light reflex might reflect Alzheimer's disease (AD) pathology. Changes in the pupil's system might be expected due to AD pathology present in the oculomotor system of the Edinger-Westphal nucleus, and a cholinergic deficit caused by degeneration of the nucleus basalis Meynert. A rather new method of repetitive light stimulation was applied assessing variations in pupil size, latency, and amplitude over time.

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Dec
1969

Spatial orientation declines early in patients with Alzheimer's disease (AD) and is a major cause for institutionalization of patients.
Use of either an aerial map or an assistive device to get from start to goal zone, both located on the campus of the hospital (distance between start and goal zone 300 m to 500 m). Use of the assistive device was trained for 15 minutes prior to the task.

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Dec
2013

In the aging population of Germany the consequences of Dementia for the society and the health care sector are complex and solutions require a multidisciplinary approach. The aim of the two-day interdisciplinary expert conference was to consider dementia from different perspectives, to identify dementia-related problems and to discuss integrative solutions under consideration of complementary therapies. In different working groups the experts developed solutions and recommendations with regards to political need, health care and future research priorities.

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Dec
1969

The efficacy of nonpharmacological and multicomponent treatments in patients with dementia is under discussion, as is the ongoing debate which endpoints best measure efficacy.
194 dyads of dementia patients and their proxies interested in a combined short-term inpatient rehabilitative treatment were assessed in the patients' homes.
Analysis showed that cognition in male patients (cognitive part of the Alzheimer's Disease Assessment Scale: p = 0.

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Mar
2013

Increasing incidences of dementia necessitate the improvement of supportive measures for patients suffering from this disease and their proxies. Clinicians without psychiatric backgrounds and others involved in appraising the supportive needs of dementia patients, such as those who allocate nursing insurance, base their appraisals on the ability of patients to perform basic and instrumental activities of daily living (B-ADL, iADL). Our aim was to investigate whether a reduced ability of the patient to perform ADL is sufficient to adequately assess the supportive needs of family caregivers.

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Dec
1969

Background. Incipient Alzheimer's disease is often disguised as depressive disorder. Over the course of AD, depressive symptoms are even more frequent.

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Dec
1969

Current treatment of Alzheimer's disease rests on cholinergic and anti-glutamatergic substances. It has been suggested that acetylcholine is required for memory acquisition but is less important for memory retrieval. It was our goal to investigate the effects of treatment with donepezil, memantine, and a combination thereof on spatial memory.

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Dec
2011

The therapeutic efficacy of an intervention is often assessed in clinical trials by scales measuring multiple diverse activities that are added to produce a cumulative global score. Medical communities and health care systems subsequently use these data to calculate pooled effect sizes to compare treatments. This is done because major doubt has been cast over the clinical relevance of statistically significant findings relying on p values with the potential to report chance findings.

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Dec
2011

Alzheimer's disease (AD) is a fast growing world-wide epidemic. AD is a genetically complex, slowly progressive, and irreversible neurodegenerative disease of the brain. During decades of asymptomatic progression multiple interactive systems, pathways and molecular mechanisms (e.

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Sep
2011

Substituted judgment asks the proxy to decide what the patient would have decided, had he or she been competent. It is unclear whether substituted judgment of the patient's quality of life can serve as a surrogate measure in patients with dementia.
212 patients with dementia and their proxies were interviewed in their homes.

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Dec
1969

It has been questioned whether cognitive and behavioral scales sufficiently address the impact of dementia on the everyday life of patients. Therefore, other instruments are used, such as scales of activities of daily living (ADL). Our goal was to analyze variables influencing the appraisal of ADL.

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Nov
2011

Cerebrospinal fluid (CSF) total tau-protein (t-tau) and amyloid-beta 1-42 (Abeta(1-42)) have been increasingly included in the diagnostic process of Alzheimer's disease (AD). We aimed to analyze whether these CSF biomarkers correlate with cognitive plasticity as measured by a dynamic recognition test strategy. We assessed 29 elderly individuals (15 with incipient and 14 without AD) from an outpatient memory clinic at a university hospital by a Testing-the-Limits (TtL) based recognition paradigm consisting of a pre-test (baseline) and two post-test conditions with an interposed encoding instruction.

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Dec
1969

Global cognitive scales and meta-analyses thereof are used to appraise therapeutic efficacy over a broad range of disease severity. Clinically, however, different aspects of cognition change in different stages of disease.
Calculation of effect sizes for single cognitive functions on treatment as assessed by the Alzheimer's Disease Assessment Scale (ADAS-cog), the Mini-Mental-Status Examination (MMSE), and the Severe Impairment Battery (SIB).

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Jan
2012

Beta-amyloid 42 (Aβ42) concentrations in cerebrospinal fluid (CSF) are significantly decreased in Alzheimer's disease (AD). The aim of this study was to correlate genetic variability in presenilin 2 (PSEN2) in relation to Aβ42 concentrations and to confirm association of apolipoprotein E (APOE) alleles E4/E4 genotype with lower CSF Aβ42. Haplotype analysis of PSEN2 and APOE genotyping were performed in 175 Alzheimer's disease patients, as defined by clinical diagnosis and Aβ42 levels.

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Dec
1969

Our purpose was to assess whether cerebrospinal fluid (CSF) markers of Alzheimer's disease (AD) reflect trait or state of disease in patients with AD and amnestic mild cognitive impairment (aMCI).
Analysis of CSF levels of A-β-(1, 42), total tau and phospho-tau-181 (t-tau and p-tau-181), cognitive scaling with the cognitive part of the Alzheimer's Disease Assessment Scale and detailed neuropsychological testing including the California Verbal Learning Test (CVLT) and the Visual Reproduction Test from the Wechsler Memory Scale (WMS).
We assessed healthy elderly controls, patients with aMCI (Petersen criteria; n = 62; age 67.

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Feb
2011

In most European countries the ethnic minority migrant populations are currently reaching an age where dementia becomes an increasingly important issue. There is no European consensus on good clinical practice with these patient groups, who often have special needs and expectations with regard to dementia services.
A survey was conducted in clinical dementia centers in 15 European countries.

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Jun
2010

Quality of life (QoL) is increasingly used to characterize the impact of disease and the efficacy of interventions.
Prospective cohort study in patients' and proxies' homes with 137 patients with dementia (age 52 to 88; Mini-Mental Status Examination (MMSE) 3 to 28) and their proxies (age 43 to 90). MMSE, Behave-AD, Geriatric Depression Scale (GDS), and Bayer-ADL scale (B-ADL), and the Euroqol (EQ-5D; patient self-rating, proxy self-rating, and proxy-rating of patient).

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Oct
2010

Discriminating incipient Alzheimer's disease (AD) from major depression (MD) and age related memory decline is a challenge in clinical practice. Since AD is characterized by an early loss of neuronal and functional plasticity, a dynamic test strategy, such as the testing-the-limits (TtL) approach, that measures learning capacity can be a helpful diagnostic tool. To evaluate this, a short recognition paradigm consisting of a pre-test (baseline) and two post-test conditions with an interposed encoding instruction was developed and administered to individuals with incipient AD (n = 19; Mini Mental Status Examination (MMSE) 26.

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Feb
2012

Memory complaints of patients sometimes are not verified via standard cognitive testing. Acquisition of information in everyday life requires memorization in complex three-dimensional environments. The authors mimicked this with a photorealistic virtual environment (VE).

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Mar
2010

In everyday life, we often estimate rather than know. It was the goal of this study to assess the effect of depressed mood on cognitive estimation in old age. Cognitive estimation was performed in 44 subjects with major depressive disorder (MDD; DSM-IV) and 48 age-matched healthy subjects (HS).

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Aug
2009

The number of individuals at risk for dementia will probably increase in ageing societies as will the array of preventive and therapeutic options, both however within limited economic resources. For economic and medical purposes valid instruments are required to assess disease processes and the efficacy of therapeutic interventions for different forms and stages of illness. In principal, the impact of illness and success of an intervention can be assessed with biomedical variables, e.

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Jun
2009

Lithium, a first-line drug for the treatment of bipolar depression, has recently been shown to regulate glycogen synthase kinase-3 (GSK-3), a kinase that is involved in the phosphorylation of the tau protein. Since hyperphosphorylation of tau is a core pathological feature in Alzheimer's disease, lithium-induced inhibition of GSK-3 activity may have therapeutic effects in Alzheimer's disease. In the current study, we tested the effect of short-term lithium treatment in patients with Alzheimer's disease.

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Dec
1969

Cerebral ischaemic stroke is frequently a relapsing, if not chronic, disease. Its incidence is age-dependent, and with the ageing of society the need for effective therapies increases. This review considers current and alternative hypotheses underlying secondary prevention of stroke.

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Dec
2007

Little is known about whether events in youth impact performance in old age. We examined spatial navigation in young (4.5 months) and middle-aged (9 months) CD-1 mice in a complex maze after treatment with 3-nitropropionate (3-np; 20 mg/kg body weight; 9 injections intraperitoneally [i.

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Jun
2008

Hypoxia is one of the major common components of vascular risk factors for pathogenesis of Alzheimer's disease. This study investigated the possible relationship between hypoxia and alternative splicing of the excitatory amino acid transporter 2 (EAAT2) in a transgenic model for Alzheimer's disease. We used an APP23 mouse model prior to amyloid deposition and subjected it to chemical hypoxia treatment as induced by 3-nitropropionic acid.

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Aug
2007

A post-marketing surveillance study evaluating the sensitivity of the Individual Symptom Score (IndiSS) in assessing the treatment benefits of donepezil in patients with Alzheimer's disease (AD) under everyday conditions.
For each patient, up to three 'especially relevant' individual symptoms were defined and evaluated during donepezil treatment. Changes were scored on a five-point Likert-type scale, ranging from 'markedly improved' (+2) to 'markedly worsened' (-2).

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Dec
1969

Cholinergic therapy is used in mild-to-moderate Alzheimer's disease (AD) and antiglutamatergic therapy in moderate-to-severe AD. Global scales, as commonly used in clinical trials, blur specifics of disease progression and drug effects. The objective was to assess combination therapy of rivastigmine plus memantine by specific neuropsychological tests in patients with mild-to-moderate AD.

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Apr
2007

Information processing at central nervous system synapses is shaped by long-lasting modifications, such as long-term potentiation and short-lived and putatively synapse-specific modifications by various forms of short-term plasticity, such as facilitation, potentiation, and depression. Using an extracellular paired-pulse facilitation (PPF) protocol at the Schaffer collateral-CA1 (SC) connection in acute hippocampal slices in mice, we extend previous reports of optimal signal gain at intermediate interpulse intervals obtained at single SC synapses to the network level. Moreover, maximum signal gain changed when the input intensity was altered.

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Dec
1969

At present, inhibition of cholines-terase is the treatment of choice for subjects with mild-to-moderate Alzheimer's disease (AD). Memantine, a noncompetitive antagonist at N-methyl-d-aspartate receptors, is currently used to treat subjects with moderate-to-severe AD. The goal of this multicenter, open-label pilot study was to investigate whether combination therapy with memantine added to rivastigmine is safe and beneficial in subjects with mild-to-moderate AD.

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Feb
2007

Activity-dependent alteration in synaptic efficacy is referred to as synaptic plasticity and is the believed hallmark of any learning process. Here we employed a recently validated complex maze for spatial training and investigated the impact of repeated and extensive training on basal synaptic transmission of the hippocampal Schaffer collateral-CA1 synaptic connection in vitro. In the present experiments, male CD-1 mice were trained in a complex maze for eight consecutive days five times a day.

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Jul
2006

Exposure of pregnant animals to noxious conditions affects neuronal function in the offspring. However, exposure or treatment of the maternal animal during pregnancy affects both ancestor and offspring. In the present study, female CD-1 mice were repetitively treated with 3-nitropropionate (3-np), a selective inhibitor of succinic dehydrogenase, exclusively prior to mating.

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Jul
2006

Impairment of hippocampal function precedes frontal and parietal cortex impairment in human Alzheimer's disease (AD). Neurotrophins are critical for behavioral performance and neuronal survival in AD. We used complex and radial mazes to assess spatial orientation and learning in wild-type and B6-Tg(ThylAPP)23Sdz (APP23) animals, a transgenic mouse model of AD.

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Dec
1969

The current increase in aged individuals in number and proportion of the general population warrants dependable strategies to improve early detection of cognitive impairment. It was the goal of the present study to develop a triage for bedside testing and outpatient services. In a prospective clinical cohort study at the outpatient Memory Clinic, University of Ulm, Germany, 232 subjects were diagnosed with Alzheimer's disease [AD; NINCDS-ADRDA criteria; n = 66; age 65.

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Oct
2005

Acetylcholine esterase (AchE) inhibitors are known to remediate symptoms of Alzheimer's disease. However, only few systematic data exist on the effects of cholinergic treatment on cognitive functions in normal subjects.
This study evaluated the effects of donepezil, an inhibitor of AchE, on cognitive performance in young and healthy subjects.

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Mar
2005

Besides aspirin several new drugs for inhibition of platelet aggregation and 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibition are used in secondary stroke prevention. Pharmacology and clinical effects, however, are not fully explained by current understanding of underlying mechanisms. Population spike amplitude (PSAP), an established marker of slice integrity, was measured during hypoxia and recovery thereof in hippocampal slices from control CD1 mice (25-35 g) and animals pretreated in vivo with a single i.

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Mar
2005

The authors hypothesize that, behaviorally, episodic memory in health and disease reflects a continuum.
Subjects (N=12) with very mild Alzheimer disease (AD) and normal subjects (N=24) were investigated with functional magnetic resonance imaging (fMRI) during an episodic memory task.
Recruitment of a posterior medio-temporal network was correlated with memory performance across the spectrum from high- and low-performing normal subjects to patients with early AD.

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Feb
2004

Rapid and complete tissue reoxygenation is a prime goal of present stroke therapy. However, reoxygenation may trigger detrimental cascades that partially antagonize beneficial effects. It was our goal to investigate selective grading of reoxygenation with targeting of single mitochondrial complexes in murine hippocampal slices.

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Dec
2003

Performance on neuropsychological testing permits inferences to be made regarding neural networks required to solve the task. In healthy young human subjects it is common sense that differential performance in cognitive tasks results from recruitment of different neural networks and that alike performance results from recruitment of alike neural networks. It was the goal of the present study to investigate whether these assumptions are also valid in cross-cultural studies.

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Dec
1969

Formal assessment of cognitive impairment is rare in acute stroke, yet. It was the goal to utilize easy-to-apply established screening tests to assess cognitive impairment from any cause in patients with acute ischemic stroke.
209 consecutive patients (69.

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Mar
2003

Defective glutamate uptake has been implicated as a pathogenic event of neuronal damage related to cerebral ischemia and hypoxia. In several models of ischemia-hypoxia, a reduced immunoreactivity and altered RNA expression of excitatory amino acid transporter 2 (EAAT2), the major excitatory amino acid transporter, have been reported. However, the gene regulation of EAAT2 under these conditions is incompletely understood.

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Mar
2003

Episodic memory performance varies in older subjects but underlying biological correlates remain as yet ambiguous. We investigated episodic memory in healthy older individuals (n=24; mean age: 64.4+/-6.

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Dec
1969

Neuronal hypoxic tolerance is modulated by preceding challenges. We investigated hypoxic tolerance in CA1 pyramidal cells of murine hippocampal slices upon preceding physical challenge with two-photon illumination in close spatial proximity to the recorded area, at distant presynaptic neurons, or preceding chemical treatment with acetylsalicylic acid while zinc fluorescence was assessed with fluorescence measurement upon staining with N-(6-methoxy-8-quinolyl)-para-toluenesulfonamide (TSQ). Posthypoxic recovery (15 min hypoxia, 45 min recovery) of CA1 population spike amplitude (PSAP) upon stimulation of Schaffer collaterals in hippocampal region CA3 was 20 +/- 38% (mean +/- SD; n = 15) in control slices.

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Apr
2002

Patients with probable Alzheimer's disease and depressive patients frequently present with subjective memory complaints. Objective distinction of underlying neuronal substrate malfunction and early cross-sectional differential diagnosis have been elusive thus far. We used repetitive learning and free recall of abstract geometric patterns during functional magnetic resonance imaging to assess episodic memory in older subjects (ages 56-64 years) who sought first-time medical attention with subjective memory complaints and were diagnosed with probable Alzheimer's disease (NINCDS-ADRDA criteria; ages 51-67 years) or major depressive disorder (DSM-IV; ages 50-65 years).

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