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Liver X Receptor β Related to Tumor Progression and Ribosome Gene Expression in Papillary Thyroid Cancer

 Seonhyang Jeong  ;  In-Kyu Kim  ;  Hyunji Kim  ;  Moon Jung Choi  ;  Jandee Lee  ;  Young Suk Jo 
 Endocrinology and Metabolism (대한내분비학회지), Vol.35(3) : 656-668, 2020-09 
Journal Title
 Endocrinology and Metabolism (대한내분비학회지) 
Issue Date
Liver X receptors ; Metabolism ; Obesity ; Prognosis ; Ribosomes ; Thyroid neoplasms
Background: Intracellular lipid deposition has been reported in thyroid glands in obese animal and human. To understand the regulatory mechanism of lipid metabolism in thyroid cancer, we investigated the expression status of liver X receptor (LXR) and analyzed its clinicopathological characteristics and molecular biological features. Methods: Expression status of LXR and its transcriptional targets in human cancers were analyzed using The Cancer Genome Atlas (TCGA). The gene-sets related to high LXRβ expression was investigated by gene set enrichment analysis (GSEA) using Kyoto Encyclopedia of Genes and Genomes (KEGG) signaling pathways and gene ontology biologic process. Quantitative reverse transcription polymerase chain reaction was performed in thyroid cancer samples using our validation cohort. Results: In contrast to low expression of LXRα, LXRβ was highly expressed in thyroid cancer compared to the other types of human cancers. High LXRβ expression was correlated with the expression of LXRβ transcriptional targets genes, such as apolipoprotein C1 (APOC1), APOC2, apolipoprotein E (APOE), ATP binding cassette subfamily G member 8 (ABCG8), sterol regulatory elementbinding protein 1c (SREBP1c), and SPOT14. Furthermore, High LXRβ expression group indicated poor clinicopathological characteristics and aggressive molecular biological features independently from the drive mutation status. Mechanistically, high LXRβ expression was coordinately related to ribosome-related gene sets. Conclusion: The mechanistic link between LXRβ and ribosomal activity will be addressed to develop new diagnostic and therapeutic targets in thyroid cancers.
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1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Kim, In-Kyu(김인규)
Lee, Jan Dee(이잔디) ORCID logo https://orcid.org/0000-0003-4090-0049
Jo, Young Suk(조영석) ORCID logo https://orcid.org/0000-0001-9926-8389
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