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2015 ; 16
(5
): 11196-212
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gab.com Text
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Immunohistochemical analysis of the natural killer cell cytotoxicity pathway in
human abdominal aortic aneurysms
#MMPMID25993291
Hinterseher I
; Schworer CM
; Lillvis JH
; Stahl E
; Erdman R
; Gatalica Z
; Tromp G
; Kuivaniemi H
Int J Mol Sci
2015[May]; 16
(5
): 11196-212
PMID25993291
show ga
Our previous analysis using genome-wide microarray expression data revealed
extreme overrepresentation of immune related genes belonging the Natural Killer
(NK) Cell Mediated Cytotoxicity pathway (hsa04650) in human abdominal aortic
aneurysm (AAA). We followed up the microarray studies by immunohistochemical
analyses using antibodies against nine members of the NK pathway (VAV1, VAV3,
PLCG1, PLCG2, HCST, TYROBP, PTK2B, TNFA, and GZMB) and aortic tissue samples from
AAA repair operations (n = 6) and control aortae (n = 8) from age-, sex- and
ethnicity-matched donors from autopsies. The results confirmed the microarray
results. Two different members of the NK pathway, HCST and GRZB, which act at
different steps in the NK-pathway, were actively transcribed and translated into
proteins in the same cells in the AAA tissue demonstrated by double staining.
Furthermore, double staining with antibodies against CD68 or CD8 together with
HCST, TYROBP, PTK2B or PLCG2 revealed that CD68 and CD8 positive cells expressed
proteins of the NK-pathway but were not the only inflammatory cells involved in
the NK-pathway in the AAA tissue. The results provide strong evidence that the NK
Cell Mediated Cytotoxicity Pathway is activated in human AAA and valuable insight
for future studies to dissect the pathogenesis of human AAA.
|Adaptor Proteins, Signal Transducing/genetics/metabolism
[MESH]