產(chǎn)品概述
人成熟的腦源性神經(jīng)生長因子(BDNF,brain-derivedneurotrophicfactor),是一個分子量為13KD,由119個氨基酸殘基組成的非糖基化多肽。BDNF在氨基酸水平與NGF有52%同源性,在體液中是以非共價連接的同型二聚體。能夠表達BDNF的細胞有成纖維細胞,腦星型膠質(zhì)細胞,神經(jīng)細胞,巨核細胞,血小板和平滑肌細胞。在神經(jīng)系統(tǒng)發(fā)育過程中,BDNF可誘導神經(jīng)細胞的分化,成熟,遷移和觸突的形成。在成體, BDNF最主要的作用之一是神經(jīng)保護作用,可有效防止前腦神經(jīng)細胞遭受化學破壞而有效減少神經(jīng)細胞的死亡。血漿中檢測到BDNF是pg/ml范圍,血清中檢測到BDNF是ng/ml范圍,這種差別源于血小板脫顆粒和凝血時BDNF的釋放。
產(chǎn)品原理
本實驗采用雙抗體夾心ELISA法??谷薆DNF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人BDNF抗體,標本、標準品中的BDNF會與加入于孔中的生物素化的抗人BDNF抗體及包被于酶標板上的單抗結(jié)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(jié)合,游離的成分被洗去。加入顯色底物(顯色劑),若反應孔中有 BDNF,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,BDNF濃度與OD450值之間呈正相關(guān),可通過繪制標準曲線求出標本中BDNF濃度。
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