I'm looking to monitor immune cell activation (neutrophils, monocytes, T/B/NK-cells) using multicolour flow cytometry and was wondering if anyone can recommend already established panels?
not sure if this covers your request. I would recommend the following open source paper for reading
Standardization of whole blood immune phenotype monitoring for clinical trials: panels and methods from the ONE study.
Streitz M, Miloud T, Kapinsky M, Reed MR, Magari R, Geissler EK, Hutchinson JA, Vogt K, Schlickeiser S, Kverneland AH, Meisel C, Volk HD, Sawitzki B.
Transplant Res. 2013 Oct 25;2(1):17. doi: 10.1186/2047-1440-2-17.
The panels presented therein assess a rather broad view of an individual's immune system, not focussed on activation. However, the approach is possibly the most standardized immune monitoring flow assay and may contain elements or marker combinations that may be of interest for you.