Journal: Science Advances
Article Title: H 2 S-Prdx4 axis mitigates Golgi stress to bolster tumor-reactive T cell immunotherapeutic response
doi: 10.1126/sciadv.adp1152
Figure Lengend Snippet: ( A ) Splenocytes from Pmel mice were stained with CTV dye and stimulated with gp100 antigen (1 μg/ml) + IL-2 (100 IU/ml) followed by staining with WSP-1 dye to quantify H 2 S production using FACS ( n = 4 independent samples). ( B ) RT-PCR analysis performed on Pmel CD8 + T cells at various time points following activation to quantify mRNA levels of CBS ( n = 4). ( C and D ) Pmel T cells treated with 0.5 mM GYY4137 for 3 days. (C) FACS analysis for expression of CD62L and CD44 ( n = 4). (D) FACS analysis for expression of Tcf1/7 and Sca-1 ( n = 4). ( E and F ) WT and Cbs-KO splenocytes activated with anti-CD3 and anti-CD28 and expanded with addition of H 2 S to the Cbs-KO cells. (E) Analysis of intracellular H 2 S by FACS using WSP-1 dye and (F) FACS analysis of relative percentage of CM to EM cells ( n = 3). ( G and H ) Activated Pmel T cells transduced with lentiviral vector to overexpress CBS enzyme (Cbs td ) and on day 7 analyzed for (G) intracellular H 2 S production using WSP-1 dye and (H) frequency of CM (CD62L + CD44 + ) and Sca-1 expression ( n = 4). ( I to L ) B16-F10 tumors implanted in C57BL/6 mice and resected on day 14 to culture in vitro. Supernatant from the cultured tumor cells was extracted and transferred to cultures containing Pmel T cells and gp100 antigen with or without 0.5 mM GYY4137. T cells cultured under the conditions of the exhaustion assay were analyzed for expression of (J) CBS by FACS and (K) intracellular H 2 S using WSP-1 dye and quantified by FACS ( n = 4). (L) T cells from tumor supernatant exhaustion assay were also analyzed for the expression of CD62L and CD44 via FACS ( n = 4). All data shown represent the mean ± SEM and were analyzed by two-sided Student’s t test or one-way analysis of variance (ANOVA). ns, P > 0.05; * P ≤ 0.05; ** P ≤ 0.01; *** P ≤ 0.001; ****P ≤ 0.0001.
Article Snippet: In addition, MitoTracker Red (Cell Signaling Technology no. 9082), LIVE/DEAD Fixable Yellow Dead Cell Stain Kit (Invitrogen no. L34959), DCFDA dye (Abcam no. ab113851), and WSP-1 dye (MCE no. HY-124409) were used to evaluate mitochondrial mass, cell viability, cellular ROS, and H 2 S production, respectively, following the manufacturer’s protocol.
Techniques: Staining, Reverse Transcription Polymerase Chain Reaction, Activation Assay, Expressing, Transduction, Plasmid Preparation, In Vitro, Cell Culture