英文名稱:IGFBP-3 ELISA
【預(yù)期用途】
本產(chǎn)品僅供科研使用。本試劑盒采用雙位點(diǎn)酶聯(lián)免疫吸附分析法(ELISA)定量測(cè)定人類血清中的類胰島素生長(zhǎng)因子結(jié)合蛋白3(IGFBP-3)。IGFBP-3檢測(cè)可作為評(píng)估生長(zhǎng)紊亂的輔助手段。
【概述】
類胰島素生長(zhǎng)因子(IGF-I,IGF-II)是一類參與細(xì)胞生長(zhǎng)代謝調(diào)節(jié)的多肽。在循環(huán)系統(tǒng)中,超過(guò)95%的IGF-I和IGF-II結(jié)合到6種特異性的IGF結(jié)合蛋白(IGFBP-1到6)。IGFBP不僅通過(guò)阻止IGF結(jié)合到細(xì)胞表面的受體以調(diào)節(jié)IGF的活性,而且某些IGFBP擁有不依賴于IGF的獨(dú)立作用。IGFBP中含量最豐富的是IGFBP-3,正常血清中有超過(guò)75%的IGF與IGFBP-3結(jié)合。IGFBP-3是一種含有264個(gè)氨基酸的糖蛋白(去糖基后分子量為 29kDA) ,在循環(huán)系統(tǒng)中主要以高分子量的三聚體(包含IGF和酸敏感亞單位)形式存在。IGFBP-3的循環(huán)濃度取決于生長(zhǎng)激素(GH)的充足程度,隨年齡、青春期和性別而變化,并受蛋白酶活性調(diào)節(jié)。孕期婦女的血清中,蛋白水解活性顯示出較高水平。GH不足時(shí)IGFBP-3水平較低,反之則升高。血清IGFBP-3檢測(cè)在GH相關(guān)疾病的臨床評(píng)估及治療監(jiān)測(cè)中具有公認(rèn)意義。
【樣本要求】
使用血清樣本。采集血樣后應(yīng)盡快分離,-20°C下可長(zhǎng)期儲(chǔ)存,避免樣本反復(fù)凍融。
【參考文獻(xiàn)】
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