کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2981877 1578644 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increased macrophage infiltration and neovascularization in congenital bicuspid aortic valve stenosis
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
پیش نمایش صفحه اول مقاله
Increased macrophage infiltration and neovascularization in congenital bicuspid aortic valve stenosis
چکیده انگلیسی

ObjectivesPatients with congenital bicuspid aortic valves have aortic valve stenosis at a relatively young age compared with patients with tricuspid aortic valves. We hypothesize that aortic valve stenosis evolves from a more aggressive inflammatory process, with increased macrophage/T-cell and neovessel content in congenital bicuspid aortic valveswhen compared with that seen in tricuspid valves.MethodsFifty-one severely stenotic aortic valves were obtained at the time of aortic valve replacement. A total of 17 bicuspid and 34 tricuspid aortic valves were evaluated. Macrophage/T-cell infiltration (CD68 plus CD3) and neovessel density (CD34) were evaluated with immunohistochemical staining. Leaflet calcification and ossification were also quantified. Real-time polymerase chain reaction was used to assess expression of chondromodulin 1 and vascular endothelial growth factor.ResultsThe density of macrophages/T cells was greater in congenital bicuspid aortic valves than in tricuspid valves (51 ± 31 vs 23 ± 13 cells/mm2, P = .002). Neovascularization was more frequently noted in congenital bicuspid aortic valves when compared with tricuspid valves (31 ± 10 vs 21 ± 9 vessels/mm2, P = .0005), and calcification was more severe (P = .03). Expression of chondromodulin 1 demonstrated a 6-fold downregulation (P = .0003) and expression of vascular endothelial growth factor demonstrated a 2-fold increase (P = .02) in congenital bicuspid aortic valves compared with that seen in tricuspid valves. Multivariable analyses demonstrated significant associations between bicuspid aortic valve anatomy and increased inflammatory cell infiltration (β = 25.8, P = .0007) and neovascularization (β = 9.4, P = .001), despite adjusting for measured covariates.ConclusionsThe pathogenesis of aortic valve stenosis in bicuspid aortic valves is associated with a more aggressive inflammatory process with increased macrophage infiltration and neovascularization when compared with that seen in tricuspid valves.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Thoracic and Cardiovascular Surgery - Volume 142, Issue 4, October 2011, Pages 895–901
نویسندگان
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