Thyroid stimulating hormone assay as the first line biochemical parameter to determine thyroid gland abnormalities

Area of Science:

• Endocrinology
• Metabolic Disorders
• Thyroid Function

Background:

• Hyperthyroidism is characterized by increased cellular catabolic activities due to excessive thyroid hormone secretion.
• Thyroid hormones, thyroxine (T4) and triiodothyronine (T3), regulate metabolism.
• Thyroid-stimulating hormone (TSH) plays a crucial role in regulating thyroid hormone production.

Purpose of the Study:

• To investigate plasma levels of T4, T3, and TSH in individuals with hyperthyroidism.
• To compare hormonal profiles between hyperthyroid subjects and a control group.
• To examine the relationship between thyroid hormones and TSH in primary hyperthyroidism.

Main Methods:

• Recruitment of 60 hyperthyroid subjects (45 females, 15 males) and 60 controls (45 females, 15 males).
• Measurement of plasma T4, T3, and TSH levels in both groups.
• Statistical analysis to compare hormonal levels and identify relationships.

Main Results:

• Significantly elevated plasma T4 and T3 levels were observed in the hyperthyroid group compared to controls (p < 0.05).
• Significantly decreased plasma TSH levels were found in the hyperthyroid group compared to controls (p < 0.05).
• An inverse relationship between plasma T4/T3 and TSH was identified in primary hyperthyroidism.

Conclusions:

• Hyperthyroidism is associated with elevated circulating levels of T4 and T3.
• Reduced TSH levels are characteristic of the hyperthyroid state, reflecting negative feedback on the pituitary gland.
• The findings confirm the hormonal dysregulation in hyperthyroidism and the inverse correlation between thyroid hormones and TSH.