Journal: EMBO Molecular Medicine
Article Title: Low immunogenicity of malaria pre‐erythrocytic stages can be overcome by vaccination
doi: 10.15252/emmm.202013390
Figure Lengend Snippet: A Schematic overview of experimental design. C57BL/6 mice received 2 × 10 6 OT‐I cells alone or were additionally immunised with 10,000 γ‐radiation attenuated parasites intravenously. B Flow cytometry plots show the gating strategy for identifying K b ‐SIINFEKL + CD11a hi CD8 + T cells. C Temporal analysis of antigen‐specific CD8 + T‐cell responses. Peripheral blood was obtained on days 4, 7, 14, 21, 42 and 88 post‐immunisation with WT (triangles; n = 3–9), CSP SIINFEKL (orange squares; n = 4–8) or UIS4 SIINFEKL (blue circles; n = 4–10) sporozoites, or no parasites (diamonds; n = 2–5) and stained for K b ‐SIINFEKL + CD11a hi CD8 + T cells. Line graph shows mean values (± SEM) from representative experiments. (* P < 0.05; ** P < 0.01; *** P < 0.001; Welch’s t ‐test comparing CSP SIINFEKL and UIS4 SIINFEKL ). See Appendix Table for the number of mice used per timepoint and per group. See Appendix Table for exact P ‐values. D–H C57BL/6 mice ( n = 4 per group), which received 2 × 10 6 CFSE‐labelled OT‐I splenocytes, were immunised with 10,000 γ‐radiation attenuated WT, CSP SIINFEKL or UIS4 SIINFEKL sporozoites intravenously. 5 days later, mice were sacrificed, spleens harvested and splenocytes assessed for (D) CFSE dilution of CD8 + T cells, (E) CFSE dilution of antigen‐experienced K b ‐SIINFEKL + CD11a hi CD8 + T cells and stained ex vivo (F‐H) for effector CD8 + T‐cell surface markers. Shown are flow cytometry plots of K b ‐SIINFEKL co‐staining with markers of effector phenotypes: (F) CD11a hi , (G) CD62L lo and (H) CD49d hi .
Article Snippet: Anti‐mouse CD62L‐PE‐Cy7 (MEL‐14) , Thermo Fisher Scientific , Cat# 25‐0621‐82, RRID: AB_469633.
Techniques: Flow Cytometry, Staining, Ex Vivo