TY - JOUR
T1 - The "atheroprotective" mediators apolipoproteinA-I and Foxp3 are over-abundant in unstable carotid plaques
AU - Patel, S.
AU - Chung, S. H.
AU - White, G.
AU - Bao, S.
AU - Celermajer, D. S.
PY - 2010/11/19
Y1 - 2010/11/19
N2 - Objective: Inflammation is important in plaque vulnerability but the role of atheroprotective mediators in unstable plaques is not defined. The apolipoproteinA-I (apoA-I) component of HDL, and CD4+/CD25+ regulatory T cells (with their major transcription factor, Foxp3), have been implicated in the suppression of vascular inflammation. Our aim was to characterise the presence of these novel "protective" markers (apoA-I and Foxp3) in carotid plaques from symptomatic and asymptomatic subjects. Methods and results: Plaques from 57 patients (25 symptomatic, 32 asymptomatic) were stained immunohistochemically for macrophages (CD68), T cells (CD3), monocyte chemotactic protein-1 (MCP-1), matrix metalloproteinase-2 (MMP-2), myeloperoxidase (MPO), apoA-I and Foxp3. Twelve randomly selected plaques (6 asymptomatic, 6 symptomatic) were immunostained for interleukin-10 (IL-10) and interleukin-17 (IL-17). Staining was quantified using Image-Pro Plus software. Significantly greater areas of positive immunostaining for CD68, CD3, MCP-1, MMP-2, IL-17 and MPO were found in plaques from symptomatic patients compared with asymptomatic patients (p < 0.05 for all). Furthermore, significantly greater areas of positive immunostaining for apoA-I, Foxp3 and IL-10 were found in symptomatic versus asymptomatic plaques (p < 0.05 for all). The presence of apoA-I was correlated significantly and co-localised with CD3, CD68, MCP-1, MMP-2 and MPO immunostaining (R = 0.70, 0.63, 0.52, 0.55 and 0.79, respectively; p < 0.01 for all). Foxp3 immunostaining also correlated significantly with CD3 (R = 0.42), CD68 (R = 0.47), MCP-1 (R = 0.55) and MMP-2 (R = 0.44) immunostaining (p < 0.05 for all). Conclusions: ApoA-I and Foxp3 are over-abundant in plaques from symptomatic subjects and co-localise with key inflammatory mediators. These data suggest ineffective/insufficient protection against atherosclerosis-mediated inflammation by these " atheroprotective" moieties. Crown
AB - Objective: Inflammation is important in plaque vulnerability but the role of atheroprotective mediators in unstable plaques is not defined. The apolipoproteinA-I (apoA-I) component of HDL, and CD4+/CD25+ regulatory T cells (with their major transcription factor, Foxp3), have been implicated in the suppression of vascular inflammation. Our aim was to characterise the presence of these novel "protective" markers (apoA-I and Foxp3) in carotid plaques from symptomatic and asymptomatic subjects. Methods and results: Plaques from 57 patients (25 symptomatic, 32 asymptomatic) were stained immunohistochemically for macrophages (CD68), T cells (CD3), monocyte chemotactic protein-1 (MCP-1), matrix metalloproteinase-2 (MMP-2), myeloperoxidase (MPO), apoA-I and Foxp3. Twelve randomly selected plaques (6 asymptomatic, 6 symptomatic) were immunostained for interleukin-10 (IL-10) and interleukin-17 (IL-17). Staining was quantified using Image-Pro Plus software. Significantly greater areas of positive immunostaining for CD68, CD3, MCP-1, MMP-2, IL-17 and MPO were found in plaques from symptomatic patients compared with asymptomatic patients (p < 0.05 for all). Furthermore, significantly greater areas of positive immunostaining for apoA-I, Foxp3 and IL-10 were found in symptomatic versus asymptomatic plaques (p < 0.05 for all). The presence of apoA-I was correlated significantly and co-localised with CD3, CD68, MCP-1, MMP-2 and MPO immunostaining (R = 0.70, 0.63, 0.52, 0.55 and 0.79, respectively; p < 0.01 for all). Foxp3 immunostaining also correlated significantly with CD3 (R = 0.42), CD68 (R = 0.47), MCP-1 (R = 0.55) and MMP-2 (R = 0.44) immunostaining (p < 0.05 for all). Conclusions: ApoA-I and Foxp3 are over-abundant in plaques from symptomatic subjects and co-localise with key inflammatory mediators. These data suggest ineffective/insufficient protection against atherosclerosis-mediated inflammation by these " atheroprotective" moieties. Crown
KW - ApolipoproteinA-I
KW - Atherosclerosis
KW - Foxp3
KW - Inflammation
KW - T cells
UR - http://www.scopus.com/inward/record.url?scp=78650025765&partnerID=8YFLogxK
U2 - 10.1016/j.ijcard.2009.05.024
DO - 10.1016/j.ijcard.2009.05.024
M3 - Article
C2 - 19481824
AN - SCOPUS:78650025765
VL - 145
SP - 183
EP - 187
JO - International Journal of Cardiology
JF - International Journal of Cardiology
SN - 0167-5273
IS - 2
ER -