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當(dāng)前位置:首頁 > 技術(shù)文章 > 一文了解無外泌體血清

一文了解無外泌體血清

2025-09-01 瀏覽次數(shù):149

一、外泌體介紹








外泌體(Exosomes)是直徑30-150納米的細(xì)胞外囊泡,由幾乎所有細(xì)胞類型分泌并攜帶蛋白質(zhì)、RNA、DNA、脂質(zhì)等生物活性分子,在細(xì)胞間通訊中發(fā)揮關(guān)鍵作用。近年來,外泌體研究已成為生物醫(yī)學(xué)領(lǐng)域的前沿?zé)狳c(diǎn),在疾病診斷、治療和再生醫(yī)學(xué)等方面展現(xiàn)出巨大潛力。









二、外泌體的核心功能







【細(xì)胞間通訊

通過傳遞生物活性物質(zhì)調(diào)控受體細(xì)胞功能,如促進(jìn)皮膚修復(fù)、調(diào)節(jié)免疫反應(yīng)。

組織修復(fù)與再生?

1.干細(xì)胞外泌體可促進(jìn)膠原蛋白合成,改善皮膚彈性,用于抗衰和創(chuàng)傷修復(fù)。

2.在心肌、骨關(guān)節(jié)等組織中刺激再生。

疾病信號傳遞?

腫瘤細(xì)胞通過外泌體傳遞促轉(zhuǎn)移因子,影響微環(huán)境。









三、無外泌體血清簡介






對于大多數(shù)細(xì)胞來說,體外培養(yǎng)時所用的標(biāo)準(zhǔn)培養(yǎng)基都必須在基礎(chǔ)培養(yǎng)基的基礎(chǔ)上外加FBS作為生長添加物。常用的FBS通常來自牛血清,其中含有大量的牛外泌體。這些外泌體含牛的相關(guān)蛋白質(zhì)或miRNA等分子,當(dāng)你想要研究相關(guān)細(xì)胞自身分泌外泌體時,牛血清中的外泌體可能會造成嚴(yán)重的背景問題,從而影響或干擾結(jié)果的判斷。所以進(jìn)行研究
上?;鄯f生物科技有限公司推出的無外泌體特級胎牛血清(H-EXO-50),通過取外泌體試劑盒和超速離心相結(jié)合技術(shù),粒徑檢測結(jié)果顯示,30-100nm左右的外泌體也基本檢測不到,而且無支原體污染。Exo-free FBS支持大多數(shù)細(xì)胞的正常生長,與正常FBS相比,沒有顯著差異。

圖片

ExoPerfectTM Exo-free FBS(Cat NO:H-EXO-50)


圖片

Normal FBS









四、無外泌體血清的制備方法有哪幾種








市場上常見的無外泌體血清的制備方法:





1. 超速離心法

?原理?:利用不同密度的物質(zhì)在高速離心力下的沉降速度不同,使外泌體與血清中的其他成分分離。外泌體的密度一般在1.13-1.19g/mL之間,通過選擇合適的離心速度和時間,可以將外泌體沉淀下來。

2. 超濾法

?原理?:基于外泌體的大小,使用具有特定孔徑的超濾膜,讓血清中的小分子物質(zhì)和水分通過膜孔,而外泌體等較大的顆粒被截留。

3. 試劑盒法

?原理?:利用試劑盒中的特異性試劑與外泌體結(jié)合或通過特定的分離介質(zhì),將外泌體從血清中分離出來。

4. 密度梯度離心

?原理?:在離心管中制備連續(xù)或不連續(xù)的密度梯度介質(zhì),如蔗糖、碘克沙醇等。血清中的外泌體和其他成分會根據(jù)各自的密度在密度梯度介質(zhì)中形成不同的條帶。

5. 過濾離心組合法

?原理?:結(jié)合離心和過濾兩種技術(shù),先通過離心去除大部分外泌體,再通過過濾去除殘留的小顆粒。









五、HAKATA無外泌體血清的優(yōu)勢










★ ?高剔除率?;

通過特殊工藝去除外泌體,剔除率高達(dá)99%,顯著減少外泌體對實(shí)驗(yàn)的干擾,適用于外泌體、細(xì)胞外囊泡及miRNA等精準(zhǔn)研究?。

 ?保留細(xì)胞培養(yǎng)功能?;

在去除外泌體的同時,保留了血清原有的細(xì)胞生長和維持功能,支持腫瘤細(xì)胞、原代細(xì)胞、免疫細(xì)胞及多種干細(xì)胞(如胚胎干細(xì)胞、間充質(zhì)干細(xì)胞)的培養(yǎng)需求?

 ?低雜質(zhì)含量?;

血紅蛋白和內(nèi)毒素水平極低,尤其適合對環(huán)境敏感的高要求細(xì)胞培養(yǎng),降低實(shí)驗(yàn)背景噪音?

★ ?嚴(yán)格質(zhì)量控制?;

采用多重過濾工藝(如3次0.1μm過濾)和40余項(xiàng)檢測,確保批次穩(wěn)定性,并提供可溯源的檢驗(yàn)檢疫報告?。

?靈活應(yīng)用場景?;

廣泛應(yīng)用于細(xì)胞間通信、疾病標(biāo)志物研究及藥物載體開發(fā)等領(lǐng)域,為科研提供高特異性實(shí)驗(yàn)條件?。


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