Microarray Analysis of Papillary Thyroid Cancers in Korean.
10.3904/kjim.2010.25.4.399
- Author:
Hyun Sook KIM
1
;
Do Hyung KIM
;
Ji Yeon KIM
;
Nam Ho JEOUNG
;
In Kyu LEE
;
Jin Gu BONG
;
Eui Dal JUNG
Author Information
1. Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea. jed15@cu.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
BRAF mutation;
Oligonucleotide array sequence analysis;
FOXA2 protein, human;
Thyroid cancer
- MeSH:
Adult;
Aged;
Carcinoma, Papillary/*genetics;
Female;
*Gene Expression Profiling;
Hepatocyte Nuclear Factor 3-beta/analysis/genetics;
Humans;
Immunohistochemistry;
Kallikreins/analysis/genetics;
Korea;
Male;
Middle Aged;
*Mutation;
Oligonucleotide Array Sequence Analysis/*methods;
Polymerase Chain Reaction;
Proto-Oncogene Proteins B-raf/*genetics;
Thyroid Neoplasms/*genetics;
Vesicular Transport Proteins/analysis/genetics
- From:The Korean Journal of Internal Medicine
2010;25(4):399-407
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND/AIMS: Papillary thyroid cancer (PTC) is the most common malignancy of the thyroid gland. It involves several molecular mechanisms. The BRAF V600E mutation has been identified as the most common genetic abnormality in PTC. Moreover, it is known to be more prevalent in Korean PTC patients than in patients from other countries. We investigated distinct genetic profiles in Korean PTC through cDNA microarray analysis. METHODS: Transcriptional profiles of five PTC samples and five paired normal thyroid tissue samples were generated using cDNA microarrays. The tumors were genotyped for BRAF mutations. The results of the cDNA microarray gene expression analysis were confirmed by real-time PCR and immunohistochemistry analysis of 35 PTC patients. RESULTS: Four of the five patients whose PTC tissues were subjected to microarray analysis were found to carry the BRAF V600E mutation. Microarrays analysis of the five PTC tissue samples showed the expression of 96 genes to be increased and that of 16 genes decreased. Real-time reverse transcription-polymerase chain reaction (RT-PCR) confirmed increased expression of SLC34A2, TM7SF4, COMP, KLK7, and KCNJ2 and decreased expression of FOXA2, SLC4A4, LYVE-1, and TFCP2L1 in PTC compared with normal tissue. Of these genes, TFCP2L1, LYVE-1, and KLK7 were previously unidentified in PTC microarray analysis. Notably, Foxa2 activity in PTC was reduced, as shown by its cytoplasmic localization, in immunohistochemical analyses. CONCLUSIONS: These findings demonstrate both similarities and differences between our results and previous reports. In Korean cases of PTC, Foxa2 activity was reduced with its cytoplasmic accumulation. Further studies are needed to confirm the relationship between FOXA2 and BRAF mutations in Korean cases of PTC.
