Related Experiment Videos
Thyroid functions in patients with various chronic liver diseases.
T Shimada1, K Higashi, T Umeda
1Third Department of Internal Medicine, Kumamoto University School of Medicine, Japan.
Endocrinologia Japonica
|June 1, 1988
Summary
Thyroid function is altered in chronic liver disease due to decreased thyroxine and increased thyroxine-binding globulin, proportional to liver damage. Peripheral conversion of thyroxine to triiodothyronine is also impaired, correlating with hepatic dysfunction.
Area of Science:
- Endocrinology
- Hepatology
- Internal Medicine
Background:
- Thyroid dysfunction is common in patients with chronic liver diseases.
- Understanding these alterations is crucial for patient management and treatment strategies.
Purpose of the Study:
- To investigate the changes in thyroid hormone levels and related parameters in patients with chronic liver diseases.
- To correlate these thyroid function alterations with the severity of liver cell damage and hepatic dysfunction.
Main Methods:
- Radioimmunoassays were used to measure serum concentrations of total and free thyroxine (T4, FT4), total and free triiodothyronine (T3, FT3), reverse T3 (rT3), thyrotropin (TSH), and thyroxine-binding globulin (TBG).
- T3 uptake (T3U) was also measured.
- Study included patients with chronic hepatitis (CH), liver cirrhosis (LC), hepatocellular carcinoma (HCC), and healthy controls.
Main Results:
- Serum T4 and T3 levels were altered in CH, LC, and HCC patients, with significant decreases in T4 in LC and T3 in HCC.
- Serum TBG was elevated and T3U decreased in patients with chronic liver diseases, correlating with liver function tests.
- Free T4 and T3 levels, adjusted for TBG, were decreased, indicating impaired peripheral conversion of T4 to T3, particularly in LC and HCC.
Conclusions:
- Thyroid function in chronic liver disease is characterized by decreased serum thyroxine, elevated serum TBG proportional to liver damage, and impaired peripheral T4 to T3 conversion proportional to hepatic dysfunction.
- TSH levels did not differ significantly between patient groups and controls.
- These findings highlight the complex interplay between liver disease and thyroid hormone metabolism.