TAILIEUCHUNG - Expression and function of calcium-activated potassium channels following in-stent restenosis in a porcine coronary artery model

In-stent restenosis (ISR) occurs due to proliferation and migration of smooth muscle cells from media to intima resulting in re-narrowing of the vessel lumen. This study aims to investigate changes in the three main KCa channels in response to stent implantation in porcine coronary arteries as their expression and function in ISR is yet to be defined. Twenty-eight days after stent implantation, immunofluorescent labelling with anti-desmin and anti-vWF confirm the presence of both endothelial and smooth muscle cells within the neointimal layer. Using real-time PCR, significant increase in the SK3 and IKCa and BKCa channel mRNA was observed within this layer alone. Western blot analysis confirms the expression of KCa channels in neointima. Although expression of BKCa was increased in the neointima in comparison with medial region of the artery, microelectrode recordings showed that the function of this channel was unchanged. However, the presence of functional BKCa in both medial and intimal cells suggests that smooth muscle cells migration may contribute to neointimal hyperplasia. | Expression and function of calcium-activated potassium channels following in-stent restenosis in a porcine coronary artery model

• Sinh học
• In stent restenosis
• Calcium activated potassium channels
• Porcine coronary artery model
• Calcium activated potassium channels
• In stent restenosis