Abstract | PURPOSE: METHODS: This study is the first to examine the role of NF2/ Merlin in sporadic colorectal cancer through LOH analysis at the NF2 locus and mRNA expression analysis via quantitative RT-PCR of total NF2, NF2 isoform I and II. In addition, Merlin protein expression was assessed by immunohistochemistry and Western blotting. RESULTS: NF2 LOH was detected in 20.0 % of heterozygous cases and was found to be more frequent in tumors larger than 5 cm in diameter (p = 0.041) and in tumors with a less differentiated phenotype (p = 0.027). No differences were observed in total NF2 and NF2 isoform I/ isoform II mRNA expression between the tumors and their corresponding normal mucous tissues. NF2 isoform II was the most predominant isoform in all samples analyzed. mRNA expression levels of total NF2 and isoforms I and II were significantly lower in poorly differentiated tumors (p = 0.033, p = 0.036 and p = 0.044, respectively). Weak Merlin immunostaining was more frequent in poorly differentiated tumors (p = 0.034) and tumors classified as Dukes' C (p = 0.023). A distinct pattern of Merin phosphorylation was observed in tumors compared to normal mucous tissues. CONCLUSION:
|
Authors | Tamara Cačev, Gorana Aralica, Božo Lončar, Sanja Kapitanović |
Journal | Cellular oncology (Dordrecht)
(Cell Oncol (Dordr))
Vol. 37
Issue 1
Pg. 69-77
(Feb 2014)
ISSN: 2211-3436 [Electronic] Netherlands |
PMID | 24323642
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Neurofibromin 2
- Protein Isoforms
|
Topics |
- Aged
- Blotting, Western
- Colorectal Neoplasms
(genetics, metabolism, pathology)
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Immunohistochemistry
- Loss of Heterozygosity
- Male
- Neoplasm Staging
- Neurofibromin 2
(genetics, metabolism)
- Phosphorylation
- Protein Isoforms
(genetics, metabolism)
- Reverse Transcriptase Polymerase Chain Reaction
|