Correlation between Gli1 expression and clinicopathological significance in human pancreatic cancer / 中华外科杂志
Chinese Journal of Surgery
;
(12): 916-921, 2013.
Article
in Chinese
| WPRIM
| ID: wpr-301188
ABSTRACT
<p><b>OBJECTIVE</b>To study the clinicopathological significance and relationship of Gli1, MDM2 and p53 expression in human pancreatic cancer.</p><p><b>METHODS</b>The expression of Gli1, MDM2 and p53 proteins in 57 paired paraffin embedded pancreatic ductal adenocarcinoma (PDAC) specimens and adjacent non-cancerous pancreatic tissues was detected by immunohistochemistry. The relationship between their expression and clinicopathological characters was analyzed. Quantitative real-time PCR (qRT-PCR) was used to examine the expression of Gli1 mRNA level in 14 paired fresh PDAC specimens and adjacent non-cancerous pancreatic tissues. siRNA interference were used to further detect the close relationship among them.</p><p><b>RESULTS</b>IHC showed the expression of Gli1 (50.9%), MDM2 (57.9%) and p53 (56.1%) was increased in 57 cases of pancreatic cancer compared to that in paired normal pancreatic tissues (33.3%, 26.3% and 17.5% respectively, t = 2.413, 2.848 and 2.960, all P < 0.05). Gli1 expression was positively associated with tumor TNM stage (χ(2) = 8.211, P = 0.004), invasion depth (χ(2) = 4.247, P = 0.039) and MDM2 expression (r = 0.299, χ(2) = 5.105, P = 0.024), while expression of MDM2 and p53 was associated with tumor invasion depth (χ(2) = 5.182, P = 0.023) and TNM stage (χ(2) = 5.696, P = 0.017), respectively. Univariate and multivariate analysis revealed that Gli1 was an independent adverse prognostic indicator for patients with PDAC (RR = 2.290, 95%CI 1.051-4.992, P = 0.037), and patients with Gli1 and MDM2 co-expression had a significantly poorer overall survival than patients with their negative expression (P = 0.034). Gli1 mRNA expression was much higher in 14 cases of PDAC than that in adjacent normal pancreatic tissues (t = 2.926, P = 0.012). In p53 mutant AsPC-1 cells, Gli1 knockdown down regulated MDM2, but had no effect on p53 expression, whereas Gli1 knockdown down regulated MDM2 and up regulated p53 protein levels in p53 wild-type Capan-2 cells.</p><p><b>CONCLUSIONS</b>Gli1, MDM2 and p53 are overexpressed in PDAC, and are benefit for predicting patients' prognosis. Gli1can regulate MDM2 and wild-type p53 expression. Their co-expression might coordinately contribute to the development and progression of PDAC.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pancreatic Neoplasms
/
Prognosis
/
RNA, Messenger
/
Gene Expression Regulation, Neoplastic
/
Trans-Activators
/
Tumor Suppressor Protein p53
/
Oncogene Proteins
/
Carcinoma, Pancreatic Ductal
/
Proto-Oncogene Proteins c-mdm2
/
Zinc Finger Protein GLI1
Type of study:
Prognostic study
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
Chinese
Journal:
Chinese Journal of Surgery
Year:
2013
Type:
Article
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