Five sections from each brain (400um apart), were rehydrated in distilled water and stained using immunohistochemistry as previously described [20 (
link)]. Briefly, the sections were incubated overnight with
rat anti-CD11b αM integrin subunit (1:5000, Serotec, UK) or rabbit polyclonal
anti-GFAP (1:6000, DAKO, UK) primary antibodies, for 1h with biotinylated goat anti-rabbit or -rat (1:100, Vector, UK) secondary antibody, followed by incubation with
Avidin-Biotinylated horseradish peroxidase Complex (Vector, UK) and visualisation with diaminobenzidine/H
2O
2 (Fisher Scientific, UK).
Five further sections from each brain with the same spacing were stained using Terminal transferase mediated d-UTP nick end labelling (TUNEL) (Roche, UK). The staining procedure followed the manufacturer protocol with Co/Ni enhancement.
Five more sections per brain with the same spacing were stained with cresyl violet (Nissl).
All sections belonging to the same hypothermia setting were stained simultaneously to avoid differences in intensity.
Rocha-Ferreira E., Vincent A., Bright S., Peebles D.M, & Hristova M. (2018). The duration of hypothermia affects short-term neuroprotection in a mouse model of neonatal hypoxic ischaemic injury. PLoS ONE, 13(7), e0199890.