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Thyroglobulin Proteolysis (Tg Proteolysis)
- Target
- Tg Proteolysis
- Molecular classification
- Enzymatic Process, Proteolysis
01
Overview
Thyroglobulin proteolysis refers to the enzymatic breakdown of thyroglobulin (Tg) within thyroid follicular cells. This process is essential for the synthesis and release of thyroid hormones thyroxine (T4) and triiodothyronine (T3). It involves the action of lysosomal cathepsins (B, D, L, and K) that cleave Tg at specific sites, liberating T3 and T4 into circulation. Dysregulation can lead to various thyroid disorders, including hypothyroidism, goiter, and autoimmune thyroid diseases.
- Other names
- Thyroglobulin DegradationThyroid Hormone ReleaseTg Processing
02
Mechanism of action
N/A - This is a process, not a target for direct drug intervention.
03
Biological functions
Thyroid Hormone SynthesisThyroid Hormone ReleaseRegulation of Thyroid FunctionLysosomal Degradation
04
Disease associations
HypothyroidismGoiterAutoimmune Thyroid Disease (e.g., Hashimoto's Thyroiditis)Thyroid Cancer
05
Safety considerations
Dysregulation can lead to hypothyroidism or hyperthyroidismIncomplete proteolysis may release immunogenic Tg fragments, triggering autoimmunityAbnormal accumulation of Tg can lead to goiter
06
Biomarkers
Serum Thyroglobulin (Tg)Serum Free T4Serum Free T3TSH LevelsAnti-Thyroglobulin Antibodies (TgAb)
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