Search results for "pathology [Brain Neoplasms]"
showing 10 items of 1714 documents
Selective targeting of avidin/mannose 6-phosphate receptor chimeras to early or late endosomes
2000
Summary In this study we have used the Semliki forest virus expression system to transiently express chimeric proteins that contain transmembrane and cytoplasmic domains of the cation-independent mannose 6-phosphate receptor (CI-MPR) fused to chicken avidin. Immunofluorescence and electron microscopy studies showed that the chimeric protein with the entire cytoplasmic domain of CI-MPR was transported to late endosomes, where it accumulated. We made use of the biotin-binding capacity of lumenal avidin, and found that, in agreement with this distribution, the chimeric protein could be labelled with biotinylated HRP endocytosed for a long, but not a brief, period of time. However, truncation o…
Vulpin et ivraies, détecter vite les résistances à certains herbicides blé
2009
Herbicides inhibiting acetolactate-synthase (ALS) are currently of major importance for grass weed control in wheat in France. Rapid resistance diagnosis can help upholding their efficacy. Most cases of resistance to ALS-inhibiting herbicides are due to mutations in the gene encoding ALS. DNA-based assays were developed to detect any ALS mutation endowing resistance in black-grass (Alopecurus myosuroides) and ryegrasses (Lolium spp.). These tests enable resistance diagnosis from leaf fragments, even dried, within 48 hours. They were used to analyse black-grasses and ryegrasses sampled in fields where ALS inhibitor application failures were reported. The tests detected high frequencies of AL…
STR analysis of artificially degraded DNA--results of a collaborative European exercise.
2003
Degradation of human DNA extracted from forensic stains is, in most cases, the result of a natural process due to the exposure of the stain samples to the environment. Experiences with degraded DNA from casework samples show that every sample may exhibit different properties in this respect, and that it is difficult to systematically assess the performance of routinely used typing systems for the analysis of degraded DNA samples. Using a batch of artificially degraded DNA with an average fragment size of approx. 200 bp a collaborative exercise was carried out among 38 forensic laboratories from 17 European countries. The results were assessed according to correct allele detection, peak heig…
Analysis of microbiota in stable patients with chronic obstructive pulmonary disease
2014
To identify the bacterial diversity (microbiota) in expectorated sputum, a pyrosequencing method that investigates complex microbial communities of expectorated sputum was done in 19 stable chronic obstructive pulmonary disease patients (mean (SD) FEV1: 47 (18%) of predicted value). Using conventional culture, 3 phyla and 20 bacterial genera were identified, whereas the pyrosequencing approach detected 9 phyla and 43 genera (p < 0.001). In sputum the prevalent genera with pyrosequencing approach were Streptococcus, Actinomyces, Neisseria, Haemophilus, Rothia, Fusobacterium, Gemella, Granulicatella, Porphyromonas, Prevotella and Veillonella. Enterobacteriaceae, detected frequently in convent…
PCR testing for Treponema pallidum in paraffin-embedded skin biopsy specimens: test design and impact on the diagnosis of syphilis
2007
Background: Syphilis, a chronic infection caused by Treponema pallidum (T. pallidum), is a disease which is increasing in incidence, and thus more and more becoming a differential diagnosis in routine pathology. Aim: Since histological changes are not specific, we sought to develop a polymerase chain reaction (PCR)-based molecular assay for the detection of T. pallidum in formalin-fixed, paraffin-embedded tissues, and evaluate its diagnostic power, especially in comparison with other ancillary methods, i.e. immunohistochemistry and Dieterle staining. Methods: 36 skin biopsies with the clinical and /or serological diagnosis of syphilis were evaluated by morphology, immunohistochemistry and s…
A brief history of the formation of DNA databases in forensic science within Europe.
2001
The introduction of DNA analysis to forensic science brought with it a number of choices for analysis, not all of which were compatible. As laboratories throughout Europe were eager to use the new technology different systems became routine in different laboratories and consequently, there was no basis for the exchange of results. A period of co-operation then started in which a nucleus of forensic scientists agreed on an uniform system. This collaboration spread to incorporate most of the established forensic science laboratories in Europe and continued through two major changes in the technology. At each step agreement was reached on which systems to use. From the beginning it was realise…
MCMI-III Profiles of Convicted Contact Sexual Offenders: A Cluster Analysis
2019
As suggested by previous research, the study of personality traits among sexual offenders could be an important consideration in the understanding of sexual offending. This study aims to explore the possibility of classifying sexual offenders according to their personality profiles. Based on the MCMI-III scores of 97 convicted contact sexual offenders, a cluster hierarchical analysis was performed. Next, the groups were characterized according to their sociodemographic and criminological variables and significant differences between them were sought. The two clusters found did not show different MCMI-III prototypical personality profiles, and both groups only varied in the degree of general…
Predisposición genética en el consumo de alcohol: el caso de la Alcohol Deshidrogenasa 1C
2007
Introduccion: El consumo de alcohol se presenta frecuentemente asociado a determinados delitos, siendo en unas ocasiones atenuante o eximente, y en otras una infraccion penal per se. Se han identificado numerosos factores geneticos y ambientales que predisponen al consumo de alcohol. Nuestro objetivo ha sido estudiar la prevalencia del polimorfismo Ile349Val en la alcohol deshidrogenasa 1C que da lugar a la isoforma gamma 2 (metabolizador lento), y estudiar su asociacion con el consumo de alcohol asi como reflexionar sobre la dimension de la implicacion de estas variantes geneticas en la Medicina Legal. Material y Metodos: Se ha genotipado el polimorfismo Ile 349Val en 869 individuos proced…
The fine structure of denervated and reinnervated muscle spindles: morphometric study of intrafusal muscle fibers.
1979
The fine structure of normal, denervated, and reinnervated muscle spindles in lower lumbrical muscles of rats was studied morphometrically at time intervals ranging from 3-14 months. In control spindles, the mean transverse area of mitochondria was estimated to be more than twice as large in nuclear chain than in typical nuclear bag fibers. Following denervation, there was a severe decrease of the mean number and transverse area of mitochondria, and a moderate, but statistically significant decrease of the mean transverse area of intrafusal muscle fibers (IMFs) despite an increase of the number of IMFs. At 12-14 months of reinnervation, changes of the transverse areas of IMFs were statistic…
DNA-fragmentation and expression of apoptosis-related proteins in experimentally denervated and reinnervated rat facial muscle
1997
Muscle fibres may undergo apoptotic cell death in several neuromuscular disorders such as denervated muscle fibres in spinal muscular atrophies. We investigated DNA-fragmentation (in situ by the TUNEL-method) and expression of apoptosis-associated proteins in experimentally denervated and reinnervated rat facial muscle up to 24 weeks after surgery to evaluate the rate and time lapse of apoptotic muscle fibre loss. While denervated muscle displayed constantly high rates of DNA-fragmentation, denervated and immediately reinnervated muscle showed a distinct decrease of primarily elevated DNA-cleavage, finally resembling rates of normal controls. Denervated muscle fibres revealed strong immunor…