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2017 ; 14
(1
): 687-694
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Identification of differentially expressed inflammatory factors in Wilms tumors
and their association with patient outcomes
#MMPMID28693222
Guo F
; Zhang J
; Wang L
; Zhao W
; Yu J
; Zheng S
; Wang J
Oncol Lett
2017[Jul]; 14
(1
): 687-694
PMID28693222
show ga
The present study aimed to identify differentially expressed inflammatory factors
observed in Wilms tumors (WT), and to investigate the association of these
factors with clinical stage, pathological type, lymph node metastasis and
vascular involvement of WT. Surface-enhanced laser desorption/ionization-time of
flight mass spectrometry was performed to screen differentially expressed
proteins among WT and normal tissue pairs. Upregulated proteins in WT were
separated and purified by solid phase extraction and Tricine SDS-PAGE,
respectively. Following in-gel digestion, the peptide mixture was subjected to
liquid chromatography mass spectrometry to identify proteins on the basis of
their amino acid sequences. Immunohistochemistry was used to confirm the
expression of differentially expressed inflammatory proteins. Of the proteins
that were upregulated in WT, two proteins with mass/charge (m/z) ratio of 12,138
and 13,462 were identified as macrophage migration inhibitory factor (MIF) and
C-X-C motif ligand 7 (CXCL7) chemokine, respectively. The expression of these two
proteins was increased in WT compared with adjacent normal tissues and normal
renal tissues, and increased with increasing clinical stage. In addition, their
expression was significantly increased in patients with unfavorable pathological
type, lymph node metastasis and vascular involvement compared with the groups
with favorable type, and without lymph node metastasis or vascular involvement
(P<0.05). Increased pro-inflammatory MIF and CXCL7 expression in WT is closely
associated with the clinical stage, pathological type, lymph node metastasis and
vascular involvement, and may represent biomarkers for the clinical diagnosis of
WT.