Abstract:
:Expressive loss of the tumor suppressor deleted in colon cancer (DCC) may be superior to lymph node status in predicting patient survival for intermediate stage colon cancer. A polymerase chain reaction (PCR)-based method for detecting DCC would be ideal as a prognostic indicator. DCC is an alternatively spliced molecule; thus, reliability of a PCR test for DCC will depend on amplifying only those regions of the molecule that are lost in the progression of colon cancer. For this reason, we studied a colon cancer cell line model at different stages of tumor progression to determine the alternative splice pattern for DCC. A commercially available colon cancer cell line system at different stages of tumor progression was used to identify which DCC exons are lost by western blot analysis, PCR, and RT-PCR techniques. Colon cancers express abnormal DCC transcripts. The proximal and distal exons are present (exons 2 and 28-29). Exons located in the center of the molecule are absent (6-7 and 18-23). This correlated to DCC protein loss in the cell lines. For clinical utility as a disease marker, exons in the middle portion of the DCC molecule that are spliced out should be utilized. Amplification of the proximal and distal regions will result in falsely concluding that DCC is present when its protein product is not expressed.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Huerta S,Srivatsan ES,Venkatasan N,Livingston EHdoi
10.1023/a:1010626929411subject
Has Abstractpub_date
2001-09-01 00:00:00pages
1884-91issue
9eissn
0163-2116issn
1573-2568journal_volume
46pub_type
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journal_title:Digestive diseases and sciences
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journal_title:Digestive diseases and sciences
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journal_title:Digestive diseases and sciences
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Digestive diseases and sciences
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journal_title:Digestive diseases and sciences
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更新日期:2001-12-01 00:00:00