Click-iT® EdU kitを用いて 細胞増殖アッセイを行っています。 どのポイントで途中停止をかけられますか? あるいは、全てのステップを連続して行う必要がありますか?
EdU はDNAに化学的に取り込まれています。 そのため、サンプルを固定後、PBSを加えて4℃で一晩保存することが可能です。また、クリック反応により、Alexa Fluor® azide はEdUに共有結合で結合します。 そのため、クリック反応後も、PBS中で 4℃で一晩保存することが可能です。
Click-iT Plus EdU Imaging Kit は、今までの Click-iT EdU Imaging Kit と何が異なるのですか?
Click-iT EdU Imaging Kit では、反応バッファーに含まれていた銅イオンによって、GFPやR-PEが消光するなど、他の検出系との互換性の問題がありました。 Click-iT Plus EdU Imaging Kit では、銅イオンにキレート剤を付加することにより他の物質への影響を減少させました。 それに伴い、今までの Alexa Fluor azide を Alexa Fluor picolyl azide という物質に変更することで、クリック反応そのものの効率が落ちないようにしています。 Click-iT Plus EdU Flow Kit につきましても同様です。
I will be performing a cell proliferation assay using Click-iT EdU kit. At what point can I stop overnight, or do I have to perform all the steps continuously?
One may store the sample after fixation overnight in PBS at 4oC. For longer storage (<1 week) , store in buffer with 1-2% formaldehyde or in formalin to limit microbial growth. If you use sodium azide as a microbial inhibitor, it must be completely removed prior to the Click-iT reaction.
Can I combine Click-iT or Click-iT Plus reactions with phalloidin conjugates used for actin staining?
We do not recommend using phalloidin conjugates for staining actin in combination with traditional Click-iT or Click-iT Plus reactions since phalloidin is extremely sensitive to the presence of copper.
For staining actin in combination with traditional Click-iT or Click-iT Plus reactions, we recommend using anti-α-actin antibodies for staining actin in the cytoskeleton. You can find a list of our actin antibodies here.
Another option would be to use the Click-iT Plus Alexa Fluor Picolyl Azide Toolkit (Cat. Nos. C10641, C10642, C10643). These Click-iT Plus toolkits provide Copper and Copper protectant separately which makes it easier to titrate the copper concentration to obtain optimal labeling with minimal copper-mediated damage. You may need to optimize the click reaction with the lowest possible concentration of copper and then perform the phalloidin staining.
Are the Alexa Fluor azides from Click-iT EdU kits available separately?
Yes, but the standalone products are not shipped at the same amount as provided in the Click-iT EdU kits; the amount of dye-azide provided in the Click-iT kits is proprietary information. See these catalog numbers for the standalone products:
- Cat. No. A10266: Alexa Fluor 488 azide
- Cat. No. A10270: Alexa Fluor 594 azide
- Cat. No. A10277: Alexa Fluor 647 azide
Polybrene inhibits human mesenchymal stem cell proliferation during lentiviral transduction.
Authors:Lin P, Correa D, Lin Y, Caplan AI,
Journal:PLoS One
PubMed ID:21887340
'Human mesenchymal stem cells (hMSCs) can be engineered to express specific genes, either for their use in cell-based therapies or to track them in vivo over long periods of time. To obtain long-term expression of these genes, a lentivirus- or retrovirus-mediated cell transduction is often used. However, given that the ... More