Plasma-Based Proteomics Profiling of Patients with Hyperthyroidism after Antithyroid Treatment

Area of Science:

• Biochemistry
• Proteomics
• Endocrinology

Background:

• Thyroid hormones regulate essential physiological processes, including metabolism and hemostasis.
• Previous research has focused on individual molecular pathways affected by thyroid hormones, lacking a comprehensive plasma proteomic profile of hyperthyroidism.

Purpose of the Study:

• To identify the plasma proteomic signature associated with hyperthyroidism.
• To investigate the alterations in circulating proteins and associated biochemical pathways in hyperthyroid versus euthyroid states.

Main Methods:

• Utilized an integrated untargeted proteomic approach combining difference gel electrophoresis (DIGE) and MALDI TOF mass spectrometry (MS).
• Analyzed plasma samples from hyperthyroid and euthyroid individuals, followed by network analysis using Ingenuity Pathway Analysis (IPA).

Main Results:

• Identified 20 proteins with significant abundance differences between hyperthyroid and euthyroid states (12 increased, 8 decreased).
• Key proteins with increased abundance include haptoglobin (HP) and fibrinogen gamma chain (FGG); decreased proteins include apolipoprotein A1 (APOA1) and plasminogen (PLG).
• Network analysis highlighted pathways related to infectious and inflammatory diseases, centered around NF-κB and p38 MAPK signaling, indicating acute phase response and hypercoagulability.

Conclusions:

• Hyperthyroidism is associated with a distinct plasma proteomic signature characterized by altered acute phase response signaling.
• The study suggests a shift towards a hypercoagulable and hypofibrinolytic state in hyperthyroidism.
• These findings expand the understanding of molecular alterations and biochemical pathways involved in hyperthyroidism.