Thyroid Hormone Regulates Spondin 2 to Influence Cell Migration and Invasion
Research published in the journal Endocrine-related Cancer reveals a new mechanism by which thyroid hormone regulates cell migration and invasion. The study shows that thyroid hormone 3,3',5-triiodo-L-thyronine (T(3)) positively regulates spondin 2, a protein involved in cell migration and invasion. The study's findings suggest that spondin 2 plays a significant role in tumor progression and cell migration.
Key Takeaways:
- The study found that thyroid hormone T(3) regulates spondin 2, leading to increased cell migration and invasion in hepatoma cell lines.
- Spondin 2 mRNA and protein levels increased by 3.9 to 5.7-fold after 48 hours of T(3) treatment in the HepG2-TR alpha 1#1 cell line.
- Similar results were observed in thyroidectomized rats, indicating that the regulation of spondin 2 by T(3) is a physiological process.
- Chromatin immunoprecipitation assays localized the T(3) response element on the spondin 2 promoter to the -1104/-1034 or -984/-925 regions.
- Spondin 2 knockdown cell lines exhibited higher migration ability and invasiveness compared to control cells, while overexpression led to lower migration ability and invasiveness.
- This study demonstrated that spondin 2 overexpression in some types of hepatocellular carcinomas is TR dependent.
Statistics:
- Spondin 2 mRNA and protein levels increased by 3.9 to 5.7-fold after 48 hours of T(3) treatment in the HepG2-TR alpha 1#1 cell line.
- Spondin 2 knockdown cell lines exhibited a 30% and 40% increase in migration ability and invasiveness, respectively.
Sources:
- Endocrine-related Cancer, 2010;17(1):99-111
- Cancer Weekly, 2010
- NewsRx.com