Format

Send to:

Choose Destination
See comment in PubMed Commons below
Inflammation. 2013 Apr;36(2):449-56. doi: 10.1007/s10753-012-9565-z.

Mast cells in human stenotic aortic valves are associated with the severity of stenosis.

Author information

  • 1John Paul II Hospital, Krakow, Poland. ewa.wypasek@uj.edu.pl

Abstract

Aortic valve stenosis (AS) is characterized by extensive calcification of the aortic valve leaflets and infiltration of inflammatory cells. Activated mast cells (MCs) may participate in the induction of fibrosis and calcification with ensuing valve stiffening. We sought to investigate whether the number of MCs within stenotic aortic valves is associated with the severity of AS. We studied 43 patients (19 men, 24 women) with dominant AS (age, 64.2 ± 5.9 years; mean transvalvular pressure gradient, 62.11 ± 24.47 mmHg) without atherosclerotic vascular disease, undergoing elective aortic valve replacement. MCs were detected in the excised valves by immunostaining. Aortic valves from five healthy subjects obtained on autopsy served as negative controls. The number of tryptase- and chymase-positive MCs was increased in AS valves compared with the control valves (6.9 [2.3-18.9]/mm(2) vs. 0.7 [0-2.2]/mm(2), P = 0.0001 and 3.2 [2.1-9.4]/mm(2) vs. 0.3 [0-1.9]/mm(2), P = 0.002, respectively). MCs that colocalized with macrophages and neovessels were detected mainly in the calcified regions of the leaflets. The number of MCs positively correlated with maximal (r = 0.73, P < 0.0001) and mean (r = 0.78, P < 0.0001) gradients and maximal aortic jet velocity (r = 0.68, P = 0.0005). An inverse correlation with aortic valve area (r = -0.71, P = 0.0001) was also observed. Multivariate regression analysis revealed that MC number and valve thickness were significantly associated with mean transvalvular gradient (R (2) = 0.74, P < 0.000001) in AS patients. Increased MC number within human stenotic aortic valves is associated with the severity of AS.

PMID:
23108956
[PubMed - indexed for MEDLINE]
PMCID:
PMC3591532
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Springer Icon for PubMed Central
    Loading ...
    Write to the Help Desk