目的:研究Ca2+离子对非CaBPs蛋白类过敏原二级结构和抗原活性的影响。方法:以重组榛子主要过敏原Cor h 1为研究对象,用圆二色谱(CD)研究了系列浓度的Ca2+和EDTA各自存在情况下,不同蛋白浓度溶液中rCor h 1二级结构的变化及规律,并以榛...目的:研究Ca2+离子对非CaBPs蛋白类过敏原二级结构和抗原活性的影响。方法:以重组榛子主要过敏原Cor h 1为研究对象,用圆二色谱(CD)研究了系列浓度的Ca2+和EDTA各自存在情况下,不同蛋白浓度溶液中rCor h 1二级结构的变化及规律,并以榛子过敏患者血清为一抗,用ELISA实验分析了Ca2+和EDTA对rCor h 1抗原活性的影响。结果:在高浓度rCor h 1溶液中Ca2+的加入可以引起椭圆率的增加,而在低浓度的rCor h 1溶液中则引起椭圆率的降低;EDTA在高浓度和低浓度的rCor h 1溶液中均能引起rCor h 1二级结构相对含量的降低;椭圆率增加(或降低)的幅度与Ca2+、EDTA终浓度成正比。ELISA实验表明Ca2+和EDTA都能显著降低rCor h 1的抗原活性。结论:Ca2+离子可以显著影响rCor h 1的二级结构,降低其抗原活性,为非CaBPs蛋白类低致敏原的研究奠定了较好的前期研究基础。展开更多
Effects of procainamide (PA) on human platelet aggregation and the cytosolic free-Ca2+ concentration ([Ca2+]) were investigated in vitro. PA at doses of 8.5 , 34 and 136 μmol·L-1 could inhibit the human platelet...Effects of procainamide (PA) on human platelet aggregation and the cytosolic free-Ca2+ concentration ([Ca2+]) were investigated in vitro. PA at doses of 8.5 , 34 and 136 μmol·L-1 could inhibit the human platelet aggregation induced by 0. 5 μmol · L-1 A23187 with a good concentration -effect relationship. One min and maximal aggregation rates were also inhibited ( P<0. 01 ,vs control). The [Ca2+], was decreased in the presence of PA ,and the changes of [Ca2+], showed a significant linear correlation with 1 min or maximal aggregation rate (P<0.05). These results suggest that the mechanisms of PA inhibiting platelet aggregation relate to the decrease of [Ca2+].展开更多
文摘目的:研究Ca2+离子对非CaBPs蛋白类过敏原二级结构和抗原活性的影响。方法:以重组榛子主要过敏原Cor h 1为研究对象,用圆二色谱(CD)研究了系列浓度的Ca2+和EDTA各自存在情况下,不同蛋白浓度溶液中rCor h 1二级结构的变化及规律,并以榛子过敏患者血清为一抗,用ELISA实验分析了Ca2+和EDTA对rCor h 1抗原活性的影响。结果:在高浓度rCor h 1溶液中Ca2+的加入可以引起椭圆率的增加,而在低浓度的rCor h 1溶液中则引起椭圆率的降低;EDTA在高浓度和低浓度的rCor h 1溶液中均能引起rCor h 1二级结构相对含量的降低;椭圆率增加(或降低)的幅度与Ca2+、EDTA终浓度成正比。ELISA实验表明Ca2+和EDTA都能显著降低rCor h 1的抗原活性。结论:Ca2+离子可以显著影响rCor h 1的二级结构,降低其抗原活性,为非CaBPs蛋白类低致敏原的研究奠定了较好的前期研究基础。
文摘Effects of procainamide (PA) on human platelet aggregation and the cytosolic free-Ca2+ concentration ([Ca2+]) were investigated in vitro. PA at doses of 8.5 , 34 and 136 μmol·L-1 could inhibit the human platelet aggregation induced by 0. 5 μmol · L-1 A23187 with a good concentration -effect relationship. One min and maximal aggregation rates were also inhibited ( P<0. 01 ,vs control). The [Ca2+], was decreased in the presence of PA ,and the changes of [Ca2+], showed a significant linear correlation with 1 min or maximal aggregation rate (P<0.05). These results suggest that the mechanisms of PA inhibiting platelet aggregation relate to the decrease of [Ca2+].
