Characterization of Fc gamma receptor IIb expression within abdominal aortic aneurysm.

Abstract:

OBJECTIVE:To evaluate protein profiles and Fc gamma receptor IIb (FCGRIIB) expression in abdominal aortic aneurysm (AAA) compared to the expression in normal aortas. METHODS:We performed a protein array to study the protein expression profiles within AAA and normal aortic tissues. FCGRIIB was found to be significantly elevated in AAA samples. Quantitative PCR and Western blot analyses were performed to study the expression of FCGRIIB in AAA compared to that in normal aortic tissue. Immunohistochemistry was used to locate FCGRIIB and the B cell marker CD19 in AAA and normal aortas specimens. RESULTS:FCGRIIB was significantly elevated in AAA tissues in both mRNA (AAA vs. normal control: about 5.8 folds, p < 0.001) and protein levels (AAA vs. normal control: about 6.3 folds, p < 0.001). In AAA specimens, immunohistochemistry revealed that FCGRIIB localized to the area of inflammatory infiltrates, which consisted of CD 19+ B cells and other inflammatory cells. FCGRIIB and CD19 were undetectable in normal aortas. CONCLUSIONS:FCGRIIB was significantly elevated in AAA tissues compared to normal aortas. FCGRIIB may be involved in the pathogenesis of AAA by regulation of inflammatory reactions.

authors

Shi Y,Yang CQ,Wang SW,Li W,Li J,Wang SM

doi

10.1016/j.bbrc.2017.02.088

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

295-300

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(17)30379-0

journal_volume

485

pub_type

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