Quantitative measurement of telomerase reverse transcriptase, thyroglobulin and thyroid transcription factor 1 mRNAs in anaplastic thyroid carcinoma tissues and cell lines

  • Authors:
    • Toru Takano
    • Yasuhiro Ito
    • Fumio Matsuzuka
    • Akihiro Miya
    • Kaoru Kobayashi
    • Hiroshi Yoshida
    • Akira Miyauchi
  • Corresponding author:
  • View Affiliations

  • Published online on: Saturday, September 1, 2007
  • Pages: 715-720
  • DOI: 10.3892/or.18.3.715

Abstract

Anaplastic thyroid carcinomas (ATC) are undifferentiated tumors that show rapid progression and dissemination. The recent increase in knowledge about cancer stem cells has attracted marked interest in ATC, since these lesions are suggested to be closely related to thyroid stem cells (TSCs). Due to the rarity of ATCs, however, the gene expression patterns that characterize these lesions have not been fully clarified. Using real-time quantitative reverse transcription-polymerase chain reaction, we measured the mRNA expression levels of three representative genes, telomerase reverse transcriptase (hTERT), thyroglobulin and thyroid transcription factor 1 (TTF-1) in twelve frozen tissue samples of ATC and six cell lines derived from ATCs. All twelve ATC specimens and six ATC cell lines showed an increased expression of hTERT mRNA but the expression levels of hTERT mRNA did not show a clear difference between ATCs and other thyroid tumors. The mean expression level of thyroglobulin mRNA in the ATCs and ATC cell lines was <102 times higher than that in the differentiated thyroid carcinomas. All twelve ATCs showed a loss of TTF-1 mRNA expression, but two cell lines, TCO-1 and 8505C, expressed TTF-1 mRNA. In conclusion, ATC tissues and cell lines were characterized by the expression of hTERT and a loss of thyroglobulin expression, concordant with the general recognition. However, the loss of TTF-1 expression can not characterize ATC cells, as some ATC cell lines expressed TTF-1 mRNA abundantly. This information could contribute to clarifying the nature of ATCs and could be useful in detecting TSCs, which have not yet been identified.
Journal Cover

September 2007
Volume 18 Issue 3

Print ISSN: 1021-335X
Online ISSN:1791-2431

2013 Impact Factor: 2.191
Ranked #33/202 Oncology
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APA
Takano, T., Ito, Y., Matsuzuka, F., Miya, A., Kobayashi, K., Yoshida, H., & Miyauchi, A. (2007). Quantitative measurement of telomerase reverse transcriptase, thyroglobulin and thyroid transcription factor 1 mRNAs in anaplastic thyroid carcinoma tissues and cell lines. Oncology Reports, 18, 715-720. http://dx.doi.org/10.3892/or.18.3.715
MLA
Takano, T., Ito, Y., Matsuzuka, F., Miya, A., Kobayashi, K., Yoshida, H., Miyauchi, A."Quantitative measurement of telomerase reverse transcriptase, thyroglobulin and thyroid transcription factor 1 mRNAs in anaplastic thyroid carcinoma tissues and cell lines". Oncology Reports 18.3 (2007): 715-720.
Chicago
Takano, T., Ito, Y., Matsuzuka, F., Miya, A., Kobayashi, K., Yoshida, H., Miyauchi, A."Quantitative measurement of telomerase reverse transcriptase, thyroglobulin and thyroid transcription factor 1 mRNAs in anaplastic thyroid carcinoma tissues and cell lines". Oncology Reports 18, no. 3 (2007): 715-720. http://dx.doi.org/10.3892/or.18.3.715