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Endothelin-1 Antisense Oligonucleotide Suppresses the Proliferation of Glomerular Mesangial Cells Stimulated with Angiotensin-Ⅱ

內皮素-1反譯寡核苷酸抑制第二型血管收縮素所誘發之腎絲球間質細胞增生

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摘要


反譯寡核苷酸(以下簡稱AON)最近被報告可能做為臨床治療用途。我們曾報告第二型血管收縮素(以下簡稱Ang-Ⅱ),會刺激另一個更強的細胞激素,內皮素-1(以下簡稱ET-1)之產生,因此本研究之目的即探討ET-1 AON對Ang-Ⅱ所誘發之腎絲球間質細胞增生之影響。ET-1係以放射免疫分析法測定。研究結果(1)Ang-Ⅱ可誘發腎絲球問質細胞產製較多量ET-1(2)ET-1 AON可抑制腎絲球間質細胞ET-1之產量,而ET-1 sense及scramble寡核苷酸則沒有類似作用(3)Ang-Ⅱ可刺激腎絲球間質細胞增加thymidine攝取量,此增加可受ET-1 AON部分抑制,但ET-1 sense及scramble寡核苷酸則沒有類似作用。本研究結果顯示ET-1 AON可明顯抑制腎絲球間質細胞之ET-1產量及Ang-Ⅱ所誘發之細胞增生。

並列摘要


Antisense oligonucleotide (AON) has been applied to modern molecular pharmacology. We have previously demonstrated that angiotensin-Ⅱ (Ang-Ⅱ) is an active stimulator of endothelin-1 (ET-1) production in glomerular mesangial cells. This study was designed to investigate the specific effect of ET-1 AON on inducing proliferation of cultured rat mesangial cells stimulated with Ang-Ⅱ. ET-1 was measured by radioimmunoassays. The results were: (1) Ang-II enhanced ET-1 production of mesangial cells; (2) ET-1 production of mesangial cells was significantly suppressed by ET-1 AON, and this production was not affected by either ET-1 sense or scramble oligonucleotide in different concentrations; (3) Ang-Ⅱ increased [3H]-thymidine uptake of mesangial cells, which was suppressed to 25% by ET-1 AON but not by ET-1 sense or scramble oligonucleotide. Our results indicate that ET-1 AON effectively suppresses the ET-1 production and the Ang-II-stimulated proliferation of mesangial cells, and therefore may offer treatment for proliferative glomerulonephritis.

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