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排序方式: 共有446条查询结果,搜索用时 375 毫秒
251.
ML Mostacciuolo E Pastorello G Vazza M Miorin C Angelini G Tomelleri G Galluzzi and CP Trevisan 《Clinical genetics》2009,75(6):550-555
Facioscapulohumeral muscular dystrophy (FSHD) is an autosomal dominant disease associated with a partial deletion on chromosome 4q35. Few relevant investigations have been reported on its epidemiology and were essentially based on clinical diagnosis, having been performed before recognition of the molecular mutation. We report an epidemiological survey on FSHD patients, in which the diagnosis was obtained by combined clinical and molecular evaluation. The survey concerned the north-east Italian province of Padova, an area of 871,190 inhabitants (1 January 2004). We identified 40 patients affected by FSHD based on clinical diagnosis. In 33 of them, the EcoRI fragment size in the 4q35 region ranged from 14 to 35 kb. Four other patients belonging to the same family harbored a 38-kb fragment. In these four cases, the relationship between the borderline deletion with the mild FSHD phenotype was corroborated by additional haplotype reconstruction and segregation analysis. Interestingly, the same mild facial-sparing clinical pattern was apparent only in one other patient with an EcoRI fragment of 32 kb, suggesting that this unusual FSHD phenotype may be due to very small 4q35 deletions. On the whole, estimating a prevalence rate of 44 × 10−6 , our survey confirmed FSHD as one of the most frequent neuromuscular disorders in Western populations. 相似文献
252.
Johannes CM Schlachetzki Bernd L Fiebich Elisabeth Haake Antonio CP de Oliveira Eduardo Candelario-Jalil Michael T Heneka Michael Hüll 《Journal of neuroinflammation》2010,7(1):2
Background
Recent studies suggest an important role for neurotransmitters as modulators of inflammation. Neuroinflammatory mediators such as cytokines and molecules of the arachidonic acid pathway are generated and released by microglia. The monoamine norepinephrine reduces the production of cytokines by activated microglia in vitro. However, little is known about the effects of norepinephrine on prostanoid synthesis. In the present study, we investigate the role of norepinephrine on cyclooxygenase- (COX-)2 expression/synthesis and prostaglandin (PG)E2 production in rat primary microglia. 相似文献253.
Breast MR imaging: interpretation model 总被引:21,自引:0,他引:21
Nunes LW; Schnall MD; Orel SG; Hochman MG; Langlotz CP; Reynolds CA; Torosian MH 《Radiology》1997,202(3):833
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A total of 60 children with severe congenital cardiac disease from the Great Ormond Street Hospital for Children and Guy's Hospital children's department were matched for age, gender, social class, and ethnic origin with 60 healthy children from the trauma clinic of the Department of Orthodontics and Paediatric Dentistry at Guy's Dental Hospital, London. The parents' attitude, knowledge, and dental health practices were assessed by questionnaire. The cardiac group had significantly poorer dental health practices than the healthy group. Of the cardiac children 18% had never visited the dentist compared with only 3% for the healthy group. It is difficult to assess the importance of this in terms of a serious health hazard. Current practice of cardiac physicians is to recommend that children with heart disease seek out and attend a dentist, the advice usually being accompanied by the presentation of a 'heart card' detailing antibiotic prophylaxis regimens if extractions are required. The data presented here shows that this strategy has failed. 相似文献
256.
Chomarat P; Sipowicz MA; Diwan BA; Fornwald LW; Awasthi YC; Anver MR; Rice JM; Anderson LM; Wild CP 《Carcinogenesis》1997,18(11):2179-2190
Mice naturally infected by Helicobacter hepaticus develop a chronic active
hepatitis leading to hepatocellular carcinoma. This mouse model of liver
cancer was used to examine the impact of bacterial infection on the hepatic
expression and activity of enzymes involved in carcinogen bioactivation
(phase I enzymes) and detoxification (phase II enzymes). No major
differences in total cytochrome P450 (CYP) content were found between
control and infected mice during the course of the study. The most striking
modulations of individual isoenzymes were the increases in
immunohistochemical staining observed for CYP1A and CYP2A5 in relation to
increasing age and liver lesions. The increase in CYP2A5 in mice aged over
12 months was confirmed by the observed increases in coumarin
7-hydroxylation (CYP2A5 substrate) in vitro and CYP2A5 mRNA levels by
Northern blot analysis. Immunoblotting confirmed the specific induction of
CYP1A2 in infected mice 12 and 18 months of age. Perfusion of liver with
nitroblue tetrazolium, an indicator for superoxide formation, demonstrated
that in livers of infected mice, hepatocytes often co-expressed CYP2A5 and
formazan deposition. Concerning phase II enzymes, an enhancement of
glutathione S-transferase (GST) activities, related to the disease process,
was observed in infected mice. An age- specific increase of GSTpi and A4.4
(early stage of disease) and GST YaYa (>9 months) expression was also
demonstrated by immunohistochemical staining. In contrast, catalase and
glutathione- peroxidase activities, as well as reduced glutathione content
were decreased in the early stages of disease (3-9 months) in infected mice
compared to age-matched control mice. Overall, these results suggest that
alterations in CYP and GST expression may contribute to the aetiology of
tumour incidence due to H. hepaticus infection via production of reactive
oxygen species.
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