Journal: Military Medical Research
Article Title: Pericytes protect rats and mice from sepsis-induced injuries by maintaining vascular reactivity and barrier function: implication of miRNAs and microvesicles
doi: 10.1186/s40779-023-00442-2
Figure Lengend Snippet: The transplanted pericytes improve the vascular hyporeactivity and leakage after sepsis. a Effects of transplanting different amount of exogenous pericytes on animal survival ( n = 16 rats). Intravital microscopy ( b , red arrows indicate GFP-PC) and immunofluorescence ( c ) by CLSM were used to monitor the GFP-PC location on mesenteric venules at 24 h after transplantation of exogenous pericytes (10 6 ). Scale bars: 50 μm. d Mesenteric microvascular networks were stained for NG-2, PDGFR-β, and CD31 at 24 h after resuscitation ( n = 8 rats). Scale bars: 100 μm. e Changes in vascular response of mesenteric arterioles to NE and Ach in vivo after sepsis in rats ( n = 8). f Vascular leakage of mesenteric venules measured by the appearance of intravenously injected FITC–BSA and quantitation of FITC–BSA + vessel ( n = 8 rats). Scale bars: 50 μm. g Immunohistochemistry for ZO-1 and VE-cadherin in mesenteric venules. Scale bars: 20 μm. h Representative TEM images of tight junctions in mesenteric venules (green arrows indicate the tight junction, *indicate the erythrocyte diapedesis). Scale bars: 1 μm. NG-2 nerve/glial antigen 2, PDGFR-β platelet-derived growth factor receptor beta, CT conventional treatment, CLSM confocal laser scanning microscopy, PC pericyte, Poly(I:C)PC polyinosine-polycytidylic acid pre-treatment pericyte, NE norepinephrine, Ach acetylcholine, MA mesenteric arteriole, ZO-1 zonula occludens-1, VE-cadherin vascular endothelial cadherin, VEC vascular endothelial cell, RBC red blood cell, TJ tight junction, L lumen, TEM transmission electron microscopy. Data shown as mean ± SD. ** P < 0.01, *** P < 0.001 vs. Sham; ## P < 0.01, ### P < 0.001 vs. Sepsis; && P < 0.01, &&& P < 0.001 vs. Sepsis + CT (one-way ANOVA)
Article Snippet: For flow cytometry, cells were labeled with directly conjugated antibodies, including NG-2-PE, CD146-PE, PDGFR-β-PE, CD31-PE and IgG-PE (all from BD Biosciences, Franklin Lakes, NJ, USA).
Techniques: Intravital Microscopy, Immunofluorescence, Transplantation Assay, Staining, In Vivo, Injection, Quantitation Assay, Immunohistochemistry, Derivative Assay, Confocal Laser Scanning Microscopy, Transmission Assay, Electron Microscopy