What could be the reason for a lower yield when using M2 Macrophage Generation Medium compared to M1 Macrophage Generation Medium when starting from the same monocytes?
A common reason for a lower cell yield with M2 Macrophage Generation Medium compared to M1 Macrophage Generation Medium is that the shelf life of the M2 medium has been exceeded after cytokine supplementation.
For M2 Macrophage Generation Medium, it is critical that the supplemented medium is used within 2 weeks after addition of the cytokines. Beyond this time frame, the activity of the cytokines decreases, which can rapidly lead to a reduced differentiation efficiency and lower macrophage yield.
To ensure comparable results between M1 and M2 macrophage cultures, it is therefore strongly recommended to use the M2 medium as fresh as possible.
For M2 Macrophage Generation Medium, it is critical that the supplemented medium is used within 2 weeks after addition of the cytokines. Beyond this time frame, the activity of the cytokines decreases, which can rapidly lead to a reduced differentiation efficiency and lower macrophage yield.
To ensure comparable results between M1 and M2 macrophage cultures, it is therefore strongly recommended to use the M2 medium as fresh as possible.
