Technical library - RESOURCES

The qualitative and quantitative composition of the supplements can be found on our website and in the data sheets of the specialized media. When there is no such information specified, the composition of the supplements is confidential.

If antibiotics are deemed necessary the recommended final concentrations are: 100 U/ml penicillin + 100 µg/ml streptomycin or 50 µg/ml gentamicin + 50 ng/ml amphotericin B

Please note: Addition of antibiotics can reduce the growth rate of the cells.

PromoCell provides two types of Renal Epithelial Cells: Human Renal Epithelial Cells (HREpC) and Human Renal Cortical Epithelial Cells (HRCEpC). HREpC are isolated from the adult kidney and stain positive for cytokeratin. They comprise a heterogeneous population of renal epithelial cells. HRCEpC are isolated from the cortex of the kidney and comprise cells from proximal and distal tubuli. They also stain positive for cytokeratin.

Our kidney cells are characterized by their epithelial cell morphology and by cytokeratin expression using a pan-cytokeratin antibody.

Our HREpC (C-12665) comprise a heterogeneous mixture of renal epithelial cells isolated from cortex and medulla. The HRCEpC (C-12660) are derived from renal cortex only.

For the M2 Macrophage Generation Medium, it is extremely important that the shelf life of 2 weeks (after addition of the cytokines) is not exceeded; the yield will quickly decrease thereafter. It is best to use the M2 medium as fresh as possible to avoid discrepancies between M1 and M2 yield.

Most of our subcutaneous preadipocyte lots achieve > 80-90% differentiation when differentiation is induced at P2 (directly after thawing). We generally recommend using cells for differentiation tests that haven't undergone more than 4-5 doublings (a maximum of 1 passage after thawing), as the differentiation ratio will decline with the age of the cells.

Spinning the cells for 15 min at 350 x g has been proven and tested by PromoCell Research & Development. The QC department uses these settings during testing. Any lower centrifugation value (g-force and/or time) will lead to significant cell loss by means of non-sedimented, but intact, macrophages.

The cells sink down to the bottom of the culture vessel but don't really attach. They retain a roundish morphology and can be rinsed off with culture medium easily.

PromoCell Blood and Blood Progenitor Cells are cryopreserved directly after isolation (= P0). They haven't been in culture before freezing.

For the expansion of hematopoietic progenitors (CD133+ cells, CD34+ cells), PromoCell has developed Hematopoietic Progenitor Cell Expansion Medium XF (C-28021), a serum-free and xeno-free formulation. The medium must be supplemented with either Cytokine Mix E (C-39890) or with the user's own mixture of cytokines.

Cytokine Mix E is a ready-to-use mix containing recombinant human TPO, SCF, flt3-ligand, and IL-3. The strong expansion of the progenitor cells in Expansion Medium XF + Cytokine Mix E persists for at least two weeks.

All Adult Human Blood and Stem cells are analysed by flow cytometry to express defined markers. MSCs are additionally tested for their capacity to differentiate into the osteogenic, chondrogenic and adipogenic lineages. For more details, please see Certificate of Analysis of the respective cell type ("Phenotypic characterization").