Molecular perspectives in differentiated thyroid cancer

Area of Science:

• Molecular genetics
• Cancer research
• Genomics

Background:

• Thyroid cancer understanding has advanced due to high-throughput sequencing.
• Classical molecular abnormalities involve MAPK and PI3K pathways in follicular-derived thyroid tumorigenesis.
• Recent discoveries include new somatic driver gene mutations and prognostic mutations.

Purpose of the Study:

• To review recent advances in molecular genetics of thyroid cancer.
• To highlight new molecular abnormalities discovered.
• To explore new perspectives for diagnosis, prognosis, and targeted therapy.

Main Methods:

• High-throughput sequencing technologies (Next-Generation Sequencing).
• Identification of somatic driver gene point mutations (e.g., RASAL1).
• Analysis of mutations with prognostic value (e.g., TERT promoter mutations).
• Detection of chromosomal rearrangements (e.g., ALK).
• Assessment of gene and microRNA expression deregulation.

Main Results:

• Discovery of new somatic driver gene point mutations like RASAL1 in follicular cancer.
• Identification of prognostic mutations such as TERT promoter mutations.
• Characterization of chromosomal rearrangements, including ALK, linked to ionizing radiation.
• Observation of gene and microRNA expression deregulation forming molecular signatures.

Conclusions:

• Molecular genetics progress offers new diagnostic tools for thyroid nodules.
• Refined prognosis is achievable through molecular profiling.
• New targeted therapy strategies for radioiodine-refractory thyroid cancers are emerging.