Thyroid Hormone, Cancer, and Apoptosis.

Area of Science:

• Endocrinology
• Oncology
• Molecular Biology

Background:

• Thyroid hormones are crucial for normal metabolism, development, and growth.
• Thyroid hormones can also stimulate cancer cell proliferation through nuclear and cell surface receptors.
• Dysregulation of thyroid hormone levels (hypo- or hyperthyroidism) is linked to cancer risk and progression.

Purpose of the Study:

• To review the effects of thyroid hormone on signaling pathways in various cancers.
• To discuss the roles of nuclear thyroid hormone receptors and integrin αvβ3 in cancer.
• To explore therapeutic strategies involving thyroid hormone analogs like tetrac.

Main Methods:

• Literature review of studies on thyroid hormone action in cancer.
• Analysis of signaling pathways activated by thyroid hormones in cancer cells.
• Discussion of potential therapeutic targets and strategies.

Main Results:

• Thyroid hormones impact signaling pathways in breast, brain, liver, thyroid, and colon cancers.
• Both nuclear thyroid hormone receptor isoforms and the integrin αvβ3 receptor are implicated in cancer progression.
• Thyroid hormone deiodinase activity influences cancer development and progression.

Conclusions:

• Thyroid hormone receptors, including integrin αvβ3, are potential targets for cancer therapy.
• Understanding thyroid hormone signaling is key to developing strategies to prevent cancer recurrence.
• The deaminated analog tetrac and its derivatives show promise in reducing cancer progression and enhancing treatment outcomes.