細(xì)胞描述
The cells constitutively express the lacZ reporter gene product, E. coli derived beta-gal, as revealed or tissue sections by histochemical stain, and single tumor cells can be identified. Lymphocytes and other responding cells can be identified by double labeling with antibodies on the same slide. The contrast between stained cells and background facilitates image analysis. The beta-gal expression is very stable, but cells may need to be re-cloned after months of growth in culture.
細(xì)胞傳代步驟
如果細(xì)胞密度達(dá)80%-90%,即可進(jìn)行傳代培養(yǎng)。1. 棄去培養(yǎng)上清,用不含鈣、鎂離子的PBS潤(rùn)洗細(xì)胞1-2次。2. 加2ml消化液(0.25%Trypsin-0.53mM EDTA)于培養(yǎng)瓶中,置于37℃培養(yǎng)箱中消化1-2分鐘,然后在顯微鏡下觀察細(xì)胞消化情況,若細(xì)胞大部分變圓并脫落,迅速拿回操作臺(tái),輕敲幾下培養(yǎng)瓶后加少量培養(yǎng)基終止消化。3. 按6-8ml/瓶補(bǔ)加培養(yǎng)基,輕輕打勻后吸出,在1000RPM條件下離心4分鐘,棄去上清液,補(bǔ)加1-2mL培養(yǎng)液后吹勻。4. 將細(xì)胞懸液按1:2到1:5的比例分到新的含8ml培養(yǎng)基的新皿中或者瓶中