p53 mutations in pancreatic carcinoma and evidence of common involvement of homocopolymer tracts in DNA microdeletions.
Publication/Presentation Date
6-1-1994
Abstract
Pancreatic adenocarcinoma is a major cause of cancer death, and yet little is known about its molecular pathogenesis. We identified p53 mutations in 19 (70%) of 27 primary pancreatic adenocarcinomas. Most were missense point mutations, and the mutations were distributed primarily within the evolutionarily conserved domains. Transitions predominated over transversions, and many of the transitions were at CpG dinucleotides. Intragenic deletions accounted for 32% of mutations and were associated with decreased survival (P = 0.0016). A review of 1937 published p53 mutations revealed that the occurrence of small (1-2 base pairs) microdeletions varied among different types of human neoplasms and that pancreatic adenocarcinoma had one of the highest frequencies (13% of 47 mutations, P = 0.0036). Many small deletions occurred in iterations of single bases, but this did not fully account for their pattern of distribution, and there was evidence for the involvement of homocopolymer (polypurine:polypyrimidine) tracts. This may represent a more widespread phenomenon, because microdeletions occur in similar sequence patterns in reports of somatic and germ line mutations among genes other than p53.
Volume
54
Issue
11
First Page
3025
Last Page
3033
ISSN
0008-5472
Published In/Presented At
Redston, M. S., Caldas, C., Seymour, A. B., Hruban, R. H., da Costa, L., Yeo, C. J., & Kern, S. E. (1994). p53 mutations in pancreatic carcinoma and evidence of common involvement of homocopolymer tracts in DNA microdeletions. Cancer research, 54(11), 3025–3033.
Disciplines
Business Administration, Management, and Operations | Health and Medical Administration | Management Sciences and Quantitative Methods
PubMedID
8187092
Department(s)
Administration and Leadership
Document Type
Article