Is recruitment of α7 nicotinic acetylcholine receptor to caveolin-1-enriched lipid rafts required for nicotine-enhanced Escherichia coli K1 entry into brain endothelial cells?
α7 nAChR-mediated signaling through lipid rafts/caveolae is required for nicotine-enhanced E. coli K1 invasion of HBMEC.
Gastrointestinal bleeding in the presence of an 'asymptomatic' abdominal aortic aneurysms should be assumed to be from a primary aortoduodenal fistula unless another source can be identified with certainty without delay.