Journal: Journal for Immunotherapy of Cancer
Article Title: Anticancer effects of ikarugamycin and astemizole identified in a screen for stimulators of cellular immune responses
doi: 10.1136/jitc-2023-006785
Figure Lengend Snippet: Validation of ikarugamycin as a dendritic cell (DC) stimulator. (A) Bone marrow-derived dendritic cells (BMDCs) were treated with ikarugamycin (IKA; 1 µM) or astemizole (AST; 1 µM) for 16 hours then DC activation and maturation was analyzed by flow cytometry, 1 µg/mL of lipopolysaccharide (LPS) was used as positive control. (B, C) BMDCs were treated with IKA (0.2, 0.5, 1, 2 µM) for 16 hours, then cells were harvested, and proteins were detected by western blot. (D–E) Representative western blot images (D) and quantification (E) of control (Ctr) or hexokinase 2 (Hk2) knockdown BMDC cells. (F) Ctr or Hk2 knockdown BMDCs were pulsed with 500 µg/mL ovalbumin (OVA) protein for 4 hours, washed twice, and then co-cultured with B3Z hybridoma cells for 16 hours. Interleukin 2 (IL2) secretion was measured by ELISA as an indicator for antigen cross-presentation capacity. (G) Control (Ctr) or Hk2 knockdown BMDCs were collected for cytofluorometric detection of DC activation and maturation markers. (H) Schematic overview of the treatment of murine MCA205 fibrosarcoma with IKA (0.2 mg/kg) and oxaliplatin (OXA; 10 mg/kg), alone or in combination. (I, J) The tumor growth curves (I, mean±SEM) and Kaplan-Meier overall survival (J) of murine fibrosarcoma MCA205 cells in C57BL/6 mice (n=8–10 mice /group). (K) Schematic overview of the treatment of murine MCA205 fibrosarcoma with IKA plus OXA (Comb) and neutralizing antibodies to CD4 and CD8 (αCD4/CD8), alone or in combination. (L, M) The tumor growth curves (L, mean±SEM) and Kaplan-Meier overall survival (M) of murine fibrosarcoma MCA205 cells in immunocompetent and antibody-neutralized C57BL/6 mice (n=8–10 mice/group). Data are reported as the mean±SD of three replicates, and statistical analyses were performed with two-tailed unpaired Student’s t test (A, C, E, F, G), and two-way analysis of variance followed by the Holm-Šídák post hoc test (I, L). Log-rank test was used for survival comparison.
Article Snippet: Antibodies for western blot: αHexokinase II (Cat# 2867) αPhospho-Zap-70 (Tyr319)/Syk (Tyr352) (Cat# 2701), αZap-70 (Cat# 2705), αPhospho-LAT (Tyr220) (Cat# 3584), and αLAT (Cat#45533) were purchased from Cell Signaling Technology (Danvers, Massachusetts, USA). αPhospho-LCK (Tyr394) (Cat#933102), αLCK (Cat# 601002) were from BioLegend (San Diego, California, USA).
Techniques: Biomarker Discovery, Derivative Assay, Activation Assay, Flow Cytometry, Positive Control, Western Blot, Control, Knockdown, Cell Culture, Enzyme-linked Immunosorbent Assay, Two Tailed Test, Comparison