產(chǎn)品概述
細胞白介素2(IL-2)是一種主要由有絲分裂中具有抗原活性的T淋巴細胞產(chǎn)生的多效應細胞因子。它在促進抗原特異性T細胞克隆中發(fā)揮著重要的作用。另外,已被證明白細胞介素2(IL-2)可以調解各種類型細胞的多種免疫應答。白細胞介素2(IL-2)刺激胸腺細胞增殖,刺激增殖和分化活化的B細胞,促進生長、分化和滅活單核細胞,誘導細胞因子的生產(chǎn)和增長,誘導普通殺傷細胞增加細胞溶解活動,提高淋巴細胞激活的殺傷(LAK細胞)細胞,誘導增殖和分化少突膠質細胞。大鼠白細胞介素2(IL-2)cDNA為含有155個氨基酸殘基的前體糖蛋白、包含20個氨基酸殘基信號肽,粘合形成成熟蛋白。在氨基酸序列水平,成熟的大鼠白細胞介素2(IL-2)與小鼠白細胞介素2(IL-2)的同源性達80%。
產(chǎn)品原理
本實驗采用雙抗體夾心ELISA法。抗大鼠IL-2單抗包被于酶標板上,同時加入標本、標準品和生物素化的抗大鼠IL-2抗體,標本、標準品中的IL-2會與加入于孔中的生物素化的抗大鼠IL-2抗體及包被于酶標板上的單抗結合,形成免疫復合物,游離的成分被洗去;加入辣根過氧化物酶標記的親合素,親合素與生物素特異性結合,游離的成分被洗去。加入顯色底物(顯色劑),若反應孔中有IL-2,辣根過氧化物酶會使無色的顯色劑變藍,加終止液變黃。在450nm處測OD值,IL-2濃度與OD450值之間呈正相關,可通過繪制標準曲線求出標本中IL-2濃度。
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