Hi there, I have never before stored the tissue for any length of time before isolation of leukocytes - what were you hoping to use them for?
Here is a good protocol that we use in the lab routinely for isolating mucosal myeloid cells for flow cytometry analysis and it also works nicely for T cells and B cells - you don't need to do any enrichment after isolation.
Here is an additional protocol you may find of interest that describes fractionation of immune cells (focused on mononuclear phagocytes) from different layers of the intestine. I have experienced much better yields of lamina propria cells after switching to this protocol.
Hannah Wessel and Grant Steven Jones, I am hoping to use them only for metabolite analysis, should I be following the same protocol or are there any other less tedious protocols?