β-Cell Dysfunction and Altered Thyroid Hormone Dynamics in Post-COVID Metabolic Disturbances: An Immunometabolic...

Area of Science:

• Endocrinology
• Metabolic Syndrome
• Immunometabolism

Background:

• SARS-CoV-2 infection is linked to metabolic and endocrine changes, impacting pancreatic beta-cells and thyroid regulation.
• The interplay between thyroid function and beta-cell compensation post-COVID-19 requires further investigation.

Purpose of the Study:

• To investigate the relationship between thyroid function and pancreatic beta-cell compensatory capacity in individuals with active COVID-19, post-COVID metabolic disturbances, and a metabolic syndrome control group.

Main Methods:

• Cross-sectional study comparing beta-cell compensation (HOMA-B/HOMA-IR) and thyroid parameters across three groups.
• Thyroid status assessed via clinical classification and biochemical criteria.
• Spearman correlation analyzed associations between thyroid hormones and beta-cell function.

Main Results:

• Beta-cell compensation was lowest in active COVID-19, intermediate in post-COVID patients, and highest in the metabolic syndrome group.
• Reduced FT3 and FT3/FT4 ratio during active infection correlated positively with beta-cell compensation in the post-COVID group.
• Apparent thyroid dysfunction in post-COVID patients was mainly due to pre-existing conditions or non-thyroidal illness, not intrinsic thyroid pathology.

Conclusions:

• Post-COVID metabolic disturbances involve impaired beta-cell compensation and altered peripheral thyroid hormone dynamics.
• The observed thyroid alterations are primarily attributed to confounding factors rather than direct thyroid pathology.
• Findings support a post-COVID immunometabolic phenotype involving pancreatic and thyroid mechanisms.