Background:Thyroid hormone play an important role in basal lipid metabolism.It is well known that alteration in thyroid function can result in changes in the composition and in the transport of lipoprotein.This study aimed to study the effects of thyroid hormone on serum lipids and evaluted the correlation between thyroid hormone with Body Mass Index(BMI) and lipid profile of healthy people.
Methods:Total of 56 healthy people(28 male:28 female) ,aged 30-60 years included in this study.About 5ml of fasting blood (8-12 h.) was collected from each individual.To determine serum Thyroid stimulating hormone (TSH), Triiodothyronine (T3) and Thyroxine (T4) and the quantitative sandwich enzyme immunoassay technique were used.Lipid profile were measured by an enzymatic colorimetric(GPO-POD) method.
Results:The result of the present study showed that the levels of triglyceride was significantly higher (p< 0.05) in males than females ,while the levels of triiodothyronine was significantly higher(p< 0.05) in females than males of healthy people.Correlation analysis in healthy males showed positive correlation among BMI with lipid profile,while an inverse correlation between TSH and T4,also an inverse correlation between T3 and HDL .In healthy females there was positive correlation among T3 with BMI and WC,also between T4 and LDL ,while an inverse correlation between TSH and VLDL.
Conclusions:Thyroid metabolic hormone especially T3 regulate the resting metabolic rate and the mild thyroid dysfunction was linked to significantly changes in body weight ,lipid profile and likely represents risk factor for healthy and obesity.
Keywords: BMI, Healthy people, Lipid profile, Thyroid metabolic hormone