Linked Life Data

9661918

Source:http://linkedlifedata.com/resource/pubmed/id/9661918

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1998-7-22
pubmed:abstractText
Loss of p53 and p21WAF1 expression have previously been reported in pancreatic adenocarcinoma. Despite these findings in several reports of oncogene and tumor suppressor gene alterations in pancreatic cancer, the clinical significance of these changes is still poorly understood. In an attempt to detect molecular prognostic markers for pancreatic carcinoma, we studied the immunohistochemical expression of p53, p21WAF1, and TGF-beta1 proteins in 42 pancreatic adenocarcinomas of the ductal type. The results were correlated with clinicopathologic findings to identify the markers with prognostic significance. p53 nuclear immunoreactivity was seen in 20 (48%) of the cases, and it was strong to moderate in 14 (33%) of them. p21WAF1 cytoplasmic positivity was found in 16 (38%) of the tumors, with 72% staining strong to moderate. TGF-beta1 stained the cytoplasm of the tumor cells in 13 (31%). Of the p53-negative cases, 12 (54%) exhibited p21WAF1 expression. In 3 (30%) of cases, TGF-beta1 reactivity was seen in the absence of p53 and p21WAF1 p53 positivity identified tumors of higher grade, but did not correlate with stage or survival. TGF-beta1 expression, however, identified low-grade tumors and patients with longer survival. No correlation was found between the expression of any of these molecular markers and smoking history. We report a significant correlation between TGF-beta1 reactivity and low-grade tumors and between TGF-beta1 and better survival. This is a novel finding pointing to TGF-beta1 as a possible new stage-independent predictor of tumor survival in pancreatic ductal adenocarcinoma. In agreement with others, we also found p53 mutation in 20 (48%) of the tumors.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0002-9173
pubmed:author
pubmed:issnType
Print
pubmed:volume
110
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
16-23
pubmed:dateRevised
2005-11-17
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Analysis of p53, p21WAF1, and TGF-beta1 in human ductal adenocarcinoma of the pancreas: TGF-beta1 protein expression predicts longer survival.
pubmed:affiliation
Department of Pathology, H. Lee Moffitt Cancer Center, University of South Florida College of Medicine, Tampa 33612-9497, USA.
pubmed:publicationType
Journal Article