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Mesenchymal Stem Cells (MSC), also termed Mesenchymal Stromal Cells, are multipotent cells that can differentiate into a variety of cell types and have the capacity for self renewal. MSC have been shown to differentiate in vitro or in vivo into adipocytes, chondrocytes, osteoblasts, myocytes, neurons, hepatocytes, and pancreatic islet cells. Optimized PromoCell media are available to support both the growth of MSC and their differentiation into several different lineages. Recent experiments suggest that differentiation capabilities into diverse cell types vary between MSC of different origin.
PromoCell hMSC are harvested from normal human adipose tissue, bone marrow, and umbilical cord matrix (Wharton’s jelly) of individual donors.
The cells are tested for their ability to differentiate in vitro into adipocytes, chondrocytes, and osteoblasts. Our hMSC show a verified marker expression profile that complies with ISCT* recommendations, providing well characterized cells.
*ISCT (International Society for Cellular Therapy) Cytotherapy (2006) Vol. 8, No. 4, 315-317
NEW: Our hMSC are now also available from HLA-typed donors.
Available formats:
- Cryopreserved: Cryogenic vial containing 500.000 viable cells.
- Proliferating: >500.000 viable cells shipped in growth medium (T75 flask).
- Cell pellet: 1 million cells dissolved in 200µl RNAlater© for subsequent RNA, DNA or protein analysis. Cell pellets cannot be revived.
| Recommended plating density | 4,000 cells per cm2 |
|---|---|
| Tested Markers | Differentiation capacity to adipogenic, osteogenic and chondrognic cells tested, CD105 positive, CD73 positive, CD90 positive, CD45 negative, CD34 negative, CD14 negative, CD19 negative, HLA-DR negative |














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其检测原理为:在正常的活细胞中,磷脂酰丝氨酸(phosphotidylserine,PS)位于细胞膜的内侧,但在早期凋亡的细胞中,PS 从细胞膜的内侧翻转到细胞膜的表面,暴露在细胞外环境中。Annexin-Ⅴ(膜联蛋白-V)是一种分子量为35-36KD的Ca2+ 依赖性磷脂结合蛋白,能与PS高亲和力结合。可通过细胞外侧暴露的磷脂酰丝氨酸与凋亡早期细胞的胞膜结合。
操作步骤:
1.从室温平衡20min后的铝箔袋中取出所需板条,剩余板条用自封袋密封放回4℃。
2.设置标准品孔和样本孔,标准品孔各加不同浓度的标准品50μL;
3.样本孔中加入待测样本50μL;空白孔不加。
4.除空白孔外,标准品孔和样本孔中每孔加入辣根过氧化物酶(HRP)标记的检测抗体100μL,用封板膜封住反应孔,37℃水浴锅或恒温箱温育60min。
5.弃去液体,吸水纸上拍干,每孔加满洗涤液(350μL),静置1min,甩去洗涤液,吸水纸上拍干,如此重复洗板5次(也可用洗板机洗板)。
6.每孔加入底物A、B各50μL,37℃避光孵育15min。
7.每孔加入终止液50μL,15min内,在450nm波长处测定各孔的OD值。
按照药品管理的用于血源筛查的体外诊断试剂和采用放射性核素标记的体外诊断试剂,不属于本办法管理范围。
第十七条 根据产品风险程度由低到高,体外诊断试剂分为第一类、第二类、第三类产品。
(一)第一类产品
1.微生物培养基(不用于微生物鉴别和药敏试验);
2.样本处理用产品,如溶血剂、稀释液、染色液等。
(二)第二类产品
除已明确为第一类、第三类的产品,其他为第二类产品,主要包括:
1.用于蛋白质检测的试剂;
2.用于糖类检测的试剂;
3.用于激素检测的试剂;
4.用于酶类检测的试剂;
5.用于酯类检测的试剂;
6.用于维生素检测的试剂;
7.用于无机离子检测的试剂;
8.用于药物及药物代谢物检测的试剂;
9.用于自身抗体检测的试剂;
10.用于微生物鉴别或者药敏试验的试剂;
11.用于其他生理、生化或者免疫功能指标检测的试剂。
(三)第三类产品
1.与致病性病原体抗原、抗体以及核酸等检测相关的试剂;
2.与血型、组织配型相关的试剂;
3.与人类基因检测相关的试剂;
4.与遗传性疾病相关的试剂;
5.与麻醉药品、精神药品、医疗用毒性药品检测相关的试剂;
6.与治疗药物作用靶点检测相关的试剂;
7.与肿瘤标志物检测相关的试剂;
8.与变态反应(过敏原)相关的试剂。
我使用的是北京北方生物技术研究所提供的KIT.盒子里面有睾酮标准品,兔抗睾酮抗体,带碘标记的睾酮,和驴抗兔免疫分离剂。实验过后我查了一下生物化学书,发现睾酮这种激素的化学本质非蛋白质,而是缁醇。这样问题就出来了:据我所知,产生免疫反应的是蛋白质,然而性类固醇激素的化学本质是缁醇。请问各位,缁醇也能产生免疫反应吗?
现在跑tricine-sds-page电泳老是跑不好,
我刚做了bradford定量,
觉得差异与空菌对照还是挺明显的,
但是这个方法只能初略的估计,
还是不能精确定量,
做HPLC我现在还没有条件,
所以我想能不能用BCA或者lowry法先进行定量啊?
这种方法如果做出来结果的话,
能不能发个sci之类的文章啊?
希望高手们指点一下!
谢谢了
取名尿素。尿素含氮46%,是固体氮肥中含氮量最高的。尿素在酸、碱、酶作用下(酸、碱需加热)能水解生成氨和二氧化碳。希望我能帮助你解疑释惑。

