Journal: Nature Communications
Article Title: The CD153 vaccine is a senotherapeutic option for preventing the accumulation of senescent T cells in mice
doi: 10.1038/s41467-020-16347-w
Figure Lengend Snippet: a The proportions of senescent T cells induced by HFD loading in the VAT of mice immunized with the Alum-conjugated vaccine or the CpG-conjugated vaccine. Senescent T cells were defined as PD-1 + CD153 + cells in CD4 + , CD44 hi , CD62L lo cells. Alum-conjugated vaccine group, n = 3 in each group; CpG-conjugated vaccine group, n = 6 in each group; ND control group, n = 5; HFD control group, n = 6. b The CDC activity of the CD153 vaccine-induced antibody was assessed ( n = 3 each sample) using 2 × 10 4 LPS-stimulated RAW 264.7 cells. The vaccine-induced IgG antibodies used were purified from the sera of HFD-loaded mice at the age of 22–25 weeks immunized with the CD153-Alum vaccine, CD153-CpG vaccine, KLH-Alum vaccine or KLH-CpG vaccine. N, no stimulation with antibody; P, 100 µg/ml anti-mouse MHC class I antibody (H-2Kd/H-2Dd); closed right triangle, the concentrations of purified IgG antibodies; opened right triangle, the concentrations of anti-mouse CD153 antibody (10, 30, 100 µg/ml, respectively). c , d VAT were collected from the four groups of mice (ND control group, HFD control group, KLH-CpG vaccine group, and CD153-CpG vaccine group; n = 3 in each group) according to the time course of HFD loading and injection of vaccines. c Quantification of macrophages in the crown-like structures among the four groups. HFD vs. KLH-CpG, p = 0.11; HFD vs. CD153-CpG, p = 0.0041; KLH-CpG vs. CD153-CpG, p = 0.15. 40–50 fields per sample, F4/80 (brown); scale bars: 100 µm. d Quantification of CD153-positive cells in the crown-like structures among the four groups. HFD vs. KLH-CpG, p = 0.024; HFD vs. CD153-CpG, p = 0.0015; KLH-CpG vs. CD153-CpG, p = 0.20. 40–50 fields per sample, CD153 (brown); scale bars: 100 µm. All the data are expressed as the mean ± SEM. Statistical evaluation was performed by two-sided; unpaired two-tailed t-test, KLH-Alum vs. CD153-Alum ( a ); Bonferroni correction, ND vs. HFD ( a ), HFD vs. KLH-CpG vs. CD153-CpG ( a , c , d ); * p < 0.05; ** p < 0.01; n.s. not significant.
Article Snippet: For the CDC assay, 2 × 10 4 LPS-stimulated RAW 264.7 cells suspended in DMEM supplemented with 1% FBS were mixed with purified IgG antibodies at various concentrations (30, 100, 300 μg/ml) or positive control antibodies and incubated at 4 °C for 1 h. The positive control antibodies included an anti-mouse CD153 antibody (functional grade, RM153; eBioscience) and an anti-mouse major histocompatibility complex (MHC) class I antibody (H-2Kd/H-2Dd, functional grade, 34-1-2S; eBioscience).
Techniques: Control, Activity Assay, Purification, Injection, Vaccines, Two Tailed Test