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https://www.readbyqxmd.com/read/10390320/asymptomatic-embolization-predicts-stroke-and-tia-risk-in-patients-with-carotid-artery-stenosis
#1
J Molloy, H S Markus
BACKGROUND AND PURPOSE: Improved methods of identifying patients at high risk of thromboembolism would allow improved targeting of therapy. One such situation is carotid artery stenosis. This is associated with an increased risk of stroke, which can be reduced by carotid endarterectomy. However, the risk-benefit ratio is low in patients with tight asymptomatic stenosis and moderate symptomatic stenosis. Most stroke in patients with carotid stenosis is believed to be embolic. Therefore, the detection of asymptomatic cerebral emboli using Doppler ultrasound may allow identification of a high-risk group...
July 1999: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/9760290/s-nitrosoglutathione-reduces-the-rate-of-embolization-in-humans
#2
J Molloy, J F Martin, P A Baskerville, S C Fraser, H S Markus
BACKGROUND: Antiplatelet agents presently used in the secondary prevention of cardiovascular disease fail to prevent the majority of cases of recurrent stroke and systemic embolization. An evaluation of the efficacy of new agents is hampered by a lack of in vivo models in humans. Asymptomatic cerebral embolic signals (ES) may be detected with the use of transcranial Doppler ultrasonography. These signals are particularly common after carotid endarterectomy, and this provides a situation in which new antiplatelet agents can be evaluated...
October 6, 1998: Circulation
https://www.readbyqxmd.com/read/9626283/temporal-variability-of-asymptomatic-embolization-in-carotid-artery-stenosis-and-optimal-recording-protocols
#3
J Molloy, N Khan, H S Markus
BACKGROUND AND PURPOSE: Although asymptomatic embolization can be detected in patients with carotid artery stenosis, its temporal variability is unclear. An understanding of this is important in designing optimal recording protocols for future prospective studies of the predictive value of embolic signals (ES). We determined the effect of repeating and extending recording times in patients with symptomatic and asymptomatic carotid stenosis. METHODS: In 20 asymptomatic and 20 symptomatic subjects with > 60% carotid stenosis, we used transcranial Doppler ultrasound to record for ES in the ipsilateral middle cerebral artery...
June 1998: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/8784128/multigated-doppler-ultrasound-in-the-detection-of-emboli-in-a-flow-model-and-embolic-signals-in-patients
#4
J Molloy, H S Markus
BACKGROUND AND PURPOSE: The ability to detect asymptomatic circulating cerebral emboli may contribute to the management of patients with stroke, but its clinical usefulness will depend on effective systems for automatically detecting embolic signals (ES) and differentiating them from artifact. A new method involves the use of a multidepth probe that allows recording from both distal and proximal sample volumes along the same vessel. Theoretically, an embolus should appear sequentially, with a time delay, between the two channels, whereas an artifact should appear simultaneously in the two channels...
September 1996: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/8359690/an-engineered-pgk-promoter-and-lac-operator-repressor-system-for-the-regulation-of-gene-expression-in-mammalian-cells
#5
G N Hannan, S A Lehnert, E S MacAvoy, P A Jennings, P L Molloy
Previous reports have demonstrated that the Escherichia coli lac repressor can operate effectively in mammalian cells to repress expression of genes driven by modified viral or metallothionein (MT) promoters. We have developed a more general expression system using the promoter from the PGK1 gene (encoding murine 3-phosphoglycerate kinase) which is widely expressed in almost all cell types, including early embryonic and ES (embryonic stem) cells. Firstly, we engineered the lac repressor to include a nuclear localisation signal and placed it under control of the PGK1 promoter...
August 25, 1993: Gene
https://www.readbyqxmd.com/read/1640448/binding-of-proteins-from-embryonic-and-differentiated-cells-to-a-bidirectional-promoter-contained-within-a-cpg-island
#6
C Tyndall, F Watt, P L Molloy, P C Vincent, M Frommer
We have analysed binding sites of nuclear protein factors to a CpG island (HTF9), which contains the promoter for a pair of overlapping, divergently-transcribed "housekeeping" genes. Using DNaseI protection assays with extracts from a range of differentiated and undifferentiated cell lines, including mouse embryonic stem (ES) and embryonal carcinoma (EC) cells, we located multiple protein binding sites on HTF9. Most of the sites were outside the defined core promoter and could bind to previously identified transcription factors...
July 20, 1992: Journal of Molecular Biology
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