Have a question about one of our products? Check out our technical library for recently asked questions from other scientists around the world.
Technical Library
Recent Entries in Technical Library
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Should I warm the trypsin prior to use?
We recommend to use the trypsin as well as the other detach solutions at room temperature to avoid overtrypsinization and irreversible cellular damage.
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Can I use my own culture medium or other commercially available media for culturing PromoCell Normal Human Cells?
Our Normal Human Cells have been cultured and tested in our growth media and have adapted to these conditions. Using other media may yield unsatisfactory results due to suboptimal supplies of nutrients and growth factors. PromoCell can only guarantee good cell growth (as stated in the Certificate of Analysis), when the cells are grown in the recommended media.
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Does the differentiation capacity of Human Mesenchymal Stem Cells change over time? When should I best induce differentiation?
We have tested the differentiation capacity of our hMSC into adipocytes, chondrocytes and osteoblasts over time and still see good differentiation rates after 10 population doublings, i.e., at passage 5. However, the differentiation potential declines with ongoing population doublings. To obtain optimal differentiation rates, experiments should be performed as early in culture as possible.
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How many cells do the cell pellets contain?
PromoCell cell pellets are made from > 1 million cells and are dissolved in 200 µl RNAlater.
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What are the characteristic markers of HDLEC (C-12216, C-12217) and HDBEC (C-12211, C-12225)?
- HDLEC and HDBEC both express the typical endothelial cell marker CD31 (= PECAM-1).
- HDLEC cultures are additionally tested positive for podoplanin, a transmembrane glycoprotein involved in lymphatic vessel formation, whereas HDBECs are podoplanin-negative.
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How often should I change the growth medium when culturing PromoCell Normal Human Cells?
Generally, the medium should be changed every 2-3 days.
Please note: Following thawing, the first medium change should be performed after 16-24 hours to prevent cell damage due to residual freezing medium.
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What would be the likely impact of using PromoCell Fibroblast Growth Medium (C-23010) instead of DMEM + 10% FCS for the growth of juvenile fibroblasts (C-12300)?
PromoCell Fibroblast Growth Medium is serum-free and therefore not subjected to the lot-to-lot variations observed with DMEM/10% FCS. Our Fibroblast Growth Medium therefore allows for much more standardized cell culture conditions.
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Can PromoCell supply melanocytes from asian donors?
The majority of our skin tissue donors are caucasians. But occasionally we also get skin biopsies from asian and black donors.
Please contact our Technical Customer Support if you need cells from a particular phototype or origin. They will check our inventory and send you a list of available cell lots.Related Links and Documents
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How many bottles of medium will I need to grow 1 vial of HUVEC out to 15 population doublings?
The amount of media needed per vial depends on the growth characteristics of the cells, the size of the TC vessels and the split ratios used, the frequency of media changes, the type of experiments you perform, etc. It is therefore difficult to give definite quantities. As a rough guideline, 1-2 bottles (500 ml each) are needed for 1 vial of HUVEC.
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Which cytokine concentrations does PromoCell recommend for activating M1/M2 macrophages?
You may find all information regarding the activation and the cytokine concentrations in table 1 (page 5) of our Application Note.
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