Hsd11b2f/f mice were generated on a C57BL6 background (Artemis Pharmaceuticals, Cologne, Germany) by inserting LoxP sites into intron 1 and 5. These mice were bred with transgenic mice expressing Cre recombinase under the control of a rat nestin promoter/enhancer (B6.Cg-Tg(Nes-cre)1Kln/J; Jackson Laboratory, USA), as we described.23 (link) This generated Nestin-Cre.Hsd11b2fl/fl offspring (Hsd11b2 Brain Knock-out; Hsd11b2.BKO) and Hsd11b2fl/fl littermate controls. All experiments were performed blinded to genotype and in accordance with the United Kingdom Home Office Animals (Scientific Procedures) Act, following ethical review by the University.