37 research outputs found
Feiten en trends inzake aard en omvang van criminaliteit in het bedrijfsleven
The Trade and Industry Crime Monitor aims to provide insight into the occurrence of crime against businesses in the Netherlands and precautions taken by these businesses in order to fight crime. The research for this project was conducted in five sectors of industry - Construction industry - Retail industry and car repair - Catering - Transport, Storage and Communication - Financial organisations and business services. Index Management summarySchetsen van een betrouwbare en nauwkeurig beeld van de aard en omvang van de criminaliteit tegen bedrijven, de preventieve maatregelen die zij nemen tegen criminaliteit, de ondervonden schade, het meldingsgedrag en de ontwikkelingen daarin door de jaren heen. Als aparte bijlage: Handboek Monitor Criminaliteit Bedrijfsleven 2004 waarin alle voor dit onderzoek uitgevoerde werkzaamheden worden samengevat en de daarbij gemaakte keuzes worden onderbouwd
Alzheimer's Disease Amyloid-β Links Lens and Brain Pathology in Down Syndrome
Down syndrome (DS, trisomy 21) is the most common chromosomal disorder and the leading genetic cause of intellectual disability in humans. In DS, triplication of chromosome 21 invariably includes the APP gene (21q21) encoding the Alzheimer's disease (AD) amyloid precursor protein (APP). Triplication of the APP gene accelerates APP expression leading to cerebral accumulation of APP-derived amyloid-β peptides (Aβ), early-onset AD neuropathology, and age-dependent cognitive sequelae. The DS phenotype complex also includes distinctive early-onset cerulean cataracts of unknown etiology. Previously, we reported increased Aβ accumulation, co-localizing amyloid pathology, and disease-linked supranuclear cataracts in the ocular lenses of subjects with AD. Here, we investigate the hypothesis that related AD-linked Aβ pathology underlies the distinctive lens phenotype associated with DS. Ophthalmological examinations of DS subjects were correlated with phenotypic, histochemical, and biochemical analyses of lenses obtained from DS, AD, and normal control subjects. Evaluation of DS lenses revealed a characteristic pattern of supranuclear opacification accompanied by accelerated supranuclear Aβ accumulation, co-localizing amyloid pathology, and fiber cell cytoplasmic Aβ aggregates (∼5 to 50 nm) identical to the lens pathology identified in AD. Peptide sequencing, immunoblot analysis, and ELISA confirmed the identity and increased accumulation of Aβ in DS lenses. Incubation of synthetic Aβ with human lens protein promoted protein aggregation, amyloid formation, and light scattering that recapitulated the molecular pathology and clinical features observed in DS lenses. These results establish the genetic etiology of the distinctive lens phenotype in DS and identify the molecular origin and pathogenic mechanism by which lens pathology is expressed in this common chromosomal disorder. Moreover, these findings confirm increased Aβ accumulation as a key pathogenic determinant linking lens and brain pathology in both DS and AD
Concurrence of Danish Dementia and Cataract: Insights from the Interactions of Dementia Associated Peptides with Eye Lens α-Crystallin
Familial Danish Dementia (FDD) is an autosomal disease, which is distinguished by gradual loss of vision, deafness, progressive ataxia and dementia. Cataract is the first manifestation of the disease. In this article, we demonstrate a specific correlation between the poisoning of the chaperone activity of the rat eye lens α-crystallins, loss of lens transparency in organ culture by the pathogenic form of the Danish dementia peptide, i.e. the reduced Danish dementia peptide (redADan peptide), by a combination of ex vivo, in vitro, biophysical and biochemical techniques. The interaction of redADan peptide and lens crystallins are very specific when compared with another chaperone, HSP-70, underscoring the specificity of the pathogenic form of Danish dementia peptide, redADan, for the early onset of cataract in this disease
Saliva levels of Abeta1-42 as potential biomarker of Alzheimer's disease: a pilot study
<p>Abstract</p> <p>Background</p> <p>Simple, non-invasive tests for early detection of degenerative dementia by use of biomarkers are urgently required. However, up to the present, no validated extracerebral diagnostic markers for the early diagnosis of Alzheimer disease (AD) are available. The clinical diagnosis of probable AD is made with around 90% accuracy using modern clinical, neuropsychological and imaging methods. A biochemical marker that would support the clinical diagnosis and distinguish AD from other causes of dementia would therefore be of great value as a screening test. A total of 126 samples were obtained from subjects with AD, and age-sex-matched controls. Additionally, 51 Parkinson's disease (PD) patients were used as an example of another neurodegenerative disorder. We analyzed saliva and plasma levels of β amyloid (Aβ) using a highly sensitive ELISA kit.</p> <p>Results</p> <p>We found a small but statistically significant increase in saliva Aβ<sub>42 </sub>levels in mild AD patients. In addition, there were not differences in saliva concentration of Aβ<sub>42 </sub>between patients with PD and healthy controls. Saliva Aβ<sub>40 </sub>expression was unchanged within all the studied sample. The association between saliva Aβ<sub>42 </sub>levels and AD was independent of established risk factors, including age or Apo E, but was dependent on sex and functional capacity.</p> <p>Conclusions</p> <p>We suggest that saliva Aβ<sub>42 </sub>levels could be considered a potential peripheral marker of AD and help discrimination from other types of neurodegenerative disorders. We propose a new and promising biomarker for early AD.</p
Pattern electroretinogram (PERG) and pattern visual evoked potential (PVEP) in the early stages of Alzheimer’s disease
Alzheimer’s disease (AD) is one of the most common causes of dementia in the world. Patients with AD frequently complain of vision disturbances that do not manifest as changes in routine ophthalmological examination findings. The main causes of these disturbances are neuropathological changes in the visual cortex, although abnormalities in the retina and optic nerve cannot be excluded. Pattern electroretinogram (PERG) and pattern visual evoked potential (PVEP) tests are commonly used in ophthalmology to estimate bioelectrical function of the retina and optic nerve. The aim of this study was to determine whether retinal and optic nerve function, measured by PERG and PVEP tests, is changed in individuals in the early stages of AD with normal routine ophthalmological examination results. Standard PERG and PVEP tests were performed in 30 eyes of 30 patients with the early stages of AD. The results were compared to 30 eyes of 30 normal healthy controls. PERG and PVEP tests were recorded in accordance with the International Society for Clinical Electrophysiology of Vision (ISCEV) standards. Additionally, neural conduction was measured using retinocortical time (RCT)—the difference between P100-wave latency in PVEP and P50-wave implicit time in PERG. In PERG test, PVEP test, and RCT, statistically significant changes were detected. In PERG examination, increased implicit time of P50-wave (P < 0.03) and amplitudes reductions in P50- and N95-waves (P < 0.0001) were observed. In PVEP examination, increased latency of P100-wave (P < 0.0001) was found. A significant increase in RCT (P < 0.0001) was observed. The most prevalent features were amplitude reduction in N95-wave and increased latency of P100-wave which were seen in 56.7% (17/30) of the AD eyes. In patients with the early stages of AD and normal routine ophthalmological examination results, dysfunction of the retinal ganglion cells as well as of the optic nerve is present, as detected by PERG and PVEP tests. These dysfunctions, at least partially, explain the cause of visual disturbances observed in patients with the early stages of AD
Specific language impairment in children with velocardiofacial syndrome:Four case studies
Specific language impairment in children with velocardiofacial syndrome: Four case studies
Objective: To describe specific language impairment in four children with velocardiofacial syndrome (VCFS). Design: A descriptive, retrospective study of four cases. Setting: University Hospital Groningen, tertiary clinical care. Patients: Of 350 patients with cleft plate, 18 children were diagnosed with VCFS. Four children are described. Interventions: In all children, cardiac and plastic surgery was carried out in the first year of life. Afterward, interventions consisted of hearing improvement, pharyngoplasty, and speech therapy. Main Outcome: Inadequate and uncharacteristic development of articulation and expressive language in four children with VCFS were observed. They differed from the majority in two ways: their nonverbal 10 was in the normal range, and their language skills were below expectations for their IQ. Results: Four of 18 patients with VCFS (22%) showed poor response to therapy and did not develop language in accordance with their normal learning abilities (nonverbal learning capacities and language comprehension). Persistent hypernasal resonance and severe articulation problems remained in all four children. In two children the expressive language profile was also not in agreement with the nonverbal profile: they produced only two- and three-word utterances at the age of 6.0 and 5.3 years. The other two children at the age of 6.8 and 6.4 years produced very long sentences, but they were unintelligible. Conclusions: The speech and language impairment of the four children may be characterized as a phonological or verbal programming deficit syndrome and as such can be described as a specific language impairment in conjunction with VCFS
