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Journal of Korean Thyroid Association ; : 39-44, 2012.
Article in Korean | WPRIM | ID: wpr-111465

ABSTRACT

BACKGROUND AND OBJECTIVES: Alpha-lipoic acid (ALA) is a naturally occurring fatty acid with strong antioxidant properties that exerts protective effects against harmful free radical damage. The aim of the present study was to assess the effect of ALA on iodine uptake and expression of sodium iodine symporter (NIS) using FRTL-5 cells. MATERIALS AND METHODS: Cells were treated with ALA for various time and doses, in the presence or absence of thyrotropin (TSH). Cell viability assay, iodine uptake assay and NIS promoter activity assay were performed. RESULTS: ALA increased NIS promoter activity. It showed an additive effect when concomitantly added with TSH. After 48 hours of incubation with ALA in the presence or absence of TSH, there was no difference in iodine uptake according to doses of ALA. After 72 hours of incubation with ALA and TSH, ALA decreased iodine uptake in dose-dependent way. CONCLUSION: ALA induced NIS gene transcription of FRTL-5, but suppressed iodine uptake in the presence of TSH. ALA may suppress iodine uptake through effect for post-translation stage of NIS protein.


Subject(s)
Animals , Rats , Cell Line , Cell Survival , Iodine , Ion Transport , Sodium , Symporters , Thioctic Acid , Thyroid Gland , Thyrotropin
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