7WD10人APP基因转染CHO细胞株（附STR鉴定报告）、

产品名称：7WD10人APP基因转染CHO细胞株、7WD10人APP基因转染CHO细胞株、7WD10人APP基因转染CHO细胞株、7WD10人APP基因转染CHO细胞株细胞介绍 采用脂质体转染的方法，稳定转染CHO细胞野生型AβPPTS1 基因，所得细胞表达野生型AβPPTS1蛋白 细胞特性 1） 来源：脂质体转染CHO细胞 2） 形态：梭形 3） 含量：>1x106 个/mL 4） 污染：支原体、细菌、酵母和真菌检测为阴性 5） 规格：T75瓶或者1mL冻存管包装 运输和保存 使用含有优质胎牛血清的2ml冻存管发送存活细胞。收到细胞后，可在1000RPM，常温条件下，离心5min后，于洁净操作台弃去上清，加入推荐使用的培养基后转移至250px培养皿或者T75培养瓶中培养，传代达到细胞生长状态良好时，再进行冻存。具体操作见细胞培养步骤。 细胞用途 ：仅供科研使用。                     细胞培养步骤 一．培养基及培养冻存条件准备： 1） 准备DMEM-H培养基(DMEM-H:GIBCO,货号12800017, 添加NaHCO3 1.5g/L)，90%；优质胎牛血清，10%，添加250ug/ml G418。 2） 培养条件： 气相：空气，95%；二氧化碳，5%。 温度：37摄氏度，培养箱湿度为70%-80%。 3） 冻存液：90%完全培养基，10%DMSO，现用现配。液氮储存。 二． 细胞处理： 1） 复苏细胞：将含有1mL细胞悬液的冻存管在37℃水浴中迅速摇晃解冻，加入4mL培养基混合均匀。在1000RPM条件下离心4分钟，弃去上清液，补加1-2mL培养基后吹匀。然后将所有细胞悬液加入培养瓶中培养过夜（或将细胞悬液加入250px皿中，加入约8ml培养基，培养过夜）。第二天换液并检查细胞密度。 2） 细胞传代：如果细胞密度达80%-90%，即可进行传代培养。 对于贴壁细胞，传代可参考以下方法： 1. 弃去培养上清，用不含钙、镁离子的PBS润洗细胞1-2次。 2. 加2ml消化液（0.25%Trypsin-0.53mM EDTA）于培养瓶中，置于37℃培养箱中消化1-2分钟，然后在显微镜下观察细胞消化情况，若细胞大部分变圆并脱落，迅速拿回操作台，轻敲几下培养瓶后加少量培养基终止消化。 3. 按6-8ml/瓶补加培养基，轻轻打匀后吸出，在1000RPM条件下离心4分钟，弃去上清液，补加1-2mL培养液后吹匀。 4. 将细胞悬液按1：2到1：5的比例分到新的含8ml培养基的新皿中或者瓶中。 3）细胞冻存：待细胞生长状态良好时，可进行细胞冻存。贴壁细胞冻存时，弃去培养基后加入少量胰酶，细胞变圆脱落后，加入约1ml含血清的培养基后加入冻存管中，再添加10%DMSO后进行冻存。

An innovative magnetic immunoassay was developed for the voltammetric detection of carbohydrate antigen-125 (CA-125) on a home-made microfluidic device including a multisyringe pump, selection valve and magneto-controlled detection cell. Two kinds of biofunctionalized nanostructures including anti-CA-125 capture antibody-conjugated magnetic beads and anti-CA-125 detection antibody-labeled silver-polypyrrole (Ag-PPy) nanohybrids were utilized for a sandwiched immunoreaction in the presence of CA-125. With the help of an external magnet, the formed magnetic immunocomplexes were attached to the sensing interface to activate the electrical contact between Ag-PPy nanohybrids and the base electrode, thus resulting in the switching on of the sensor circuit for the generation of voltammetric signals thanks to electroactive Ag-PPy nanohybrids. Compared to silver nanoparticles (AgNPs) alone, improved analytical properties were acquired with Ag-PPy nanohybrids. Under the optimal conditions, the currents depended on the concentrations of target CA-125, and exhibited a linear relationship within the ranges of 0.001-300 U mL-1 at a detection limit of 7.6 mU mL-1. For the determination of CA-125, the magnetic immunoassay had acceptable reproducibility, high specificity against other biomarkers and long-term storage stability. Moreover, good accuracy was obtained for the CA-125 detection in human serum samples with the developed voltammetric immunoassay relative to commercial enzyme-linked immunosorbent assay (ELISA). Importantly, the magneto-controlled immunosensing interface could be repeatedly used via detaching/attaching the external magnet.