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Expression of PAX8 Target Genes in Papillary Thyroid Carcinoma

Author

Listed:
  • Francesca Rosignolo
  • Marialuisa Sponziello
  • Cosimo Durante
  • Cinzia Puppin
  • Catia Mio
  • Federica Baldan
  • Carla Di Loreto
  • Diego Russo
  • Sebastiano Filetti
  • Giuseppe Damante

Abstract

PAX8 is a thyroid-specific transcription factor whose expression is dysregulated in thyroid cancer. A recent study using a conditional knock-out mouse model identified 58 putative PAX8 target genes. In the present study, we evaluated the expression of 11 of these genes in normal and tumoral thyroid tissues from patients with papillary thyroid cancer (PTC). ATP1B1, GPC3, KCNIP3, and PRLR transcript levels in tumor tissues were significantly lower in PTCs than in NT, whereas LCN2, LGALS1 and SCD1 expression was upregulated in PTC compared with NT. Principal component analysis of the expression of the most markedly dysregulated PAX8 target genes was able to discriminate between PTC and NT. Immunohistochemistry was used to assess levels of proteins encoded by the two most dyregulated PAX8 target genes, LCN2 and GPC3. Interestingly, GPC3 was detectable in all of the NT samples but none of the PTC samples. Collectively, these findings point to significant PTC-associated dysregulation of several PAX8 target genes, supporting the notion that PAX8-regulated molecular cascades play important roles during thyroid tumorigenesis.

Suggested Citation

  • Francesca Rosignolo & Marialuisa Sponziello & Cosimo Durante & Cinzia Puppin & Catia Mio & Federica Baldan & Carla Di Loreto & Diego Russo & Sebastiano Filetti & Giuseppe Damante, 2016. "Expression of PAX8 Target Genes in Papillary Thyroid Carcinoma," PLOS ONE, Public Library of Science, vol. 11(6), pages 1-15, June.
    • Handle: RePEc:plo:pone00:0156658
    DOI: 10.1371/journal.pone.0156658
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