1c left panel). antigens. and as explained elsewhere.25,26 The 129/Sv MCA sarcoma cells with varying levels of H60a expression have been described previously4 and the C57BL/6 MCA sarcoma cell lines were generated in wild-type and immune-deficient mice (T. O’Sullivan, R. Saddawi-Konefka, W. Vermi, R. Uppaluri, C. D. Arthur, J. M. White, M. J. Smyth, R. D. Schreiber and J. D. Bui, manuscript in preparation) in a manner similar to the 129/Sv MCA sarcoma cells.26 Highly immunogenic tumour cell lines are derived from tumours that developed in immune-deficient mice, whereas poorly immunogenic cell lines are derived from wild-type mice.26 Cell lines were managed in RPMI-1640 supplemented with 10% fetal bovine serum, l-glutamine, non-essential amino acids, sodium pyruvate, sodium bicarbonate, penicillin/streptomycin and -mercaptoethanol. H60a-specific T-cell clones Estetrol were managed as explained previously.27 These T-cell clones displayed specificity for the H60a-derived peptide LYL8 complexed with Kb. The C57BL/6 MCA sarcoma cell collection 9609 was transduced with a retrovirus-expressing green fluorescent protein (GFP) and H60a.4 This construct has GFP under the control of an internal ribosomal entry site downstream of H60a. This allows for the use of GFP as a suitable reporter for H60a. T-cell cytokine production assay H60a-specific T-cell lines (kindly provided by Derry Roopenian) were cultured with tumour cells at a 1 : 1 ratio overnight in the presence of brefeldin A. The next day, T cells were harvested and Estetrol stained for the expression of interferon- (IFN-). In some experiments, tumour cells were pulsed with LYL8 peptide for 30 min at 37 before co-culture with T cells. The phorbol ester PMA and ionomycin (Sigma, St. Louis, MO) were used at 10 g/ml and 1 m, respectively. Mice 129/SvEv mice (H-2b haplotype) were purchased from Taconic Farms (Germantown, NY) and C57BL/6 Estetrol mice (H-2b haplotype) were purchased from Charles Rivers (Wilmington, MA). These mice were interbred to generate F1 (C57BL/6 129) mice. All animal procedures were approved by the University or college of California, San Diego Institutional Animal Care and Use Committee (UCSD IACUC) under protocol #”type”:”entrez-protein”,”attrs”:”text”:”S06201″,”term_id”:”79178″,”term_text”:”pirS06201. Tumour transplantation and processing Tumour cell lines were transplanted into recipient naive mice as explained previously.25 The mice were monitored for tumour growth and on various days post-transplant, tumour was excised from mice, minced and treated with 1 mg/ml type Ia collagenase (Sigma) in complete RPMI-1640 medium for 30 min at 37. The ipsilateral inguinal (tumour-draining) or contralateral (non-draining) lymph nodes were also harvested, and single-cell suspensions were made by crushing the lymph nodes between two glass slides. All cell suspensions were vigorously resuspended, washed in FACS staining buffer (PBS + 1% fetal bovine serum + 01% sodium azide), and Estetrol filtered before staining. For cell lines generated from tumours (Fig. 5), the cell suspension was cultured in total RPMI-1640 medium for 3C5 days before analysis by circulation cytometry. All cell lines Mouse monoclonal to KSHV ORF45 were split at least once during this period. Open in a separate window Physique 5 H60a is usually edited to a greater extent in C57BL/6 versus F1 (C57BL/6 129) mice. H60a was transduced into a C57BL/6 sarcoma cell collection and transplanted into C57BL/6 or F1 (C57BL/6 129) mice. Cell lines were generated from your tumour mass, and H60a expression was measured around the cell lines. (a) A representative histogram of H60a (solid) or IgG2a (dashed) staining of the cell lines and the parental cell collection cultured is shown. Results Acknowledgement of H60a-expressing tumour cell lines by H60p-specific T cells Tumours possess qualities that may prevent.