8 mg/mL G-418 sulphate (Gibco, Auckland, New Zealand). Surviving Sotrastaurin cost cells were assessed with Trypan blue staining. Bone marrow donor mice were pretreated with 150 mg/kg 5-fluorouracil i.p. (Sigma-Aldrich). After 6 days, the bone marrow was flushed out from femur and tibias. Erythrocytes were removed and the bone marrow cells were incubated in transplant media (RPMI 10% FCS with recombinant murine IL-3 (6 ng/mL, Becton Dickinson AG, Allschwil, Switzerland), recombinant
murine SCF (10 ng/mL, Biocoba AG, Reinach, Switzerland), and recombinant human IL-6 (10 ng/mL, Becton Dickinson AG)) for 24 h. 4×106 bone marrow cells were transfected twice on two consecutive days with the respective retroviral particles with polybrene (6.7 μg/mL) and 0.01 M HEPES through spin infection (90 min/1250 g/30°C). In total, 1×105 transduced bone marrow cells were injected i.v. into previously irradiated (4.5 or 6.5 Gy) syngeneic recipient PF-02341066 in vitro mice. CML mice were treated i.p. on day 0 and day 2, and from then on weekly with 100 μg αCD8 monoclonal antibody (YTS 169.4). The treatment depletes CD8+ T cells to below the detection limit of flow cytometry analysis (data not shown). αLy-6G-PE, αCD8-APC, αCD4-biotin, αB220-biotin, αI-Ab-MHC class II-biotin,
αCD45.1-PE, -APC, αIL-7Rα-APC and streptavidin-APC were purchased from eBioscience (San Diego, CA, USA). αCD8-PE and -APC-Cy7, αPD-1-PE-Cy7, αCD45.1-PerCP-Cy5.5 and αCD44-APC-Cy7 were purchased from BioLegend (San Diego, CA, USA). αIL-7-biotin was purchased from Abcam (Cambridge, MA, USA). αCD8-PerCP-Cy5.5, αCD4-PerCP-Cy5.5, αVα2-biotin and -PE were purchased from BD Pharmingen (San Diego, CA, USA). αIL-15Rα-biotin was obtained from R&D Systems (Oxon, UK). MHC class I (H-2Db) tetramer-PE complexed with gp33 was purchased from Beckman Coulter (Immunomics,
Marseille, France) and used according to the manufacturer’s protocol. Relative fluorescence intensities were measured on a BD™ LSRII flow cytometer (BD Biosciences, San Jose, CA, USA) and analyzed using FlowJo™ software (Tree Star, Ashland, OR, USA). MHC class I (H-2Db) dextramer-PE complexed with gp33 was purchased from Immudex (Copenhagen, Denmark). Single-cell suspensions of pooled spleens and lymph nodes were prepared and stained with Dextramer-gp33-PE according Immune system to the manufacturer’s protocol, followed by washing and incubation with αPE-microbeads (Miltenyi Biotec, Bergisch Gladbach, Germany). Enrichment was performed using MACS LS columns (Miltenyi Biotec) and cells were stained with αCD8-APC. Samples were measured and analyzed as described in “Antibodies and flow cytometry”. Single-cell suspensions of spleens were prepared and cells were incubated in RPMI 10% FCS in the presence or absence of 5 μg/mL brefeldin A (Sigma-Aldrich). After 5 h, granulocytes were stained with αLy-6G-PE and samples were fixed in 4% paraformaldehyde.