Anahita Ebrahimpour1, Mostafa Vaghari-Tabari2, Durdi Qujeq3, Soheila Moein4, Zoleikha Moazezi5. 1. Student Research Committee, Babol University of Medical Sciences, Babol, Iran; Department of Clinical Biochemistry, Babol University of Medical Sciences, Babol, Iran. 2. Department of Biochemistry, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran. Electronic address: mostafavaghari@yahoo.com. 3. Department of Clinical Biochemistry, Babol University of Medical Sciences, Babol, Iran; Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran; Cancer Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran. 4. Department of Biochemistry, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran; Medicinal Plants Processing Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. 5. Department of Endocrinology, Internal Medicine, Ayatollah Rouhani Hospital, Babol University of Medical Sciences, Babol, Iran.
Abstract
BACKGROUND: Subclinical hypothyroidism known as mild thyroid disorder without significant sign and symptoms. The correlation between subclinical hypothyroidism and some of cardiovascular disease risk factors such as serum lipids, homocysteine levels and also insulin resistance index is not well established and the current study was conducted to clarify this issue. METHODS AND MATERIALS: Seventy four patients with mild elevation in levels of thyroid stimulating hormone (TSH) along with normal levels of T3 and T4 were selected as patients group and 74 age and sex matched individuals were selected as healthy control group. Serum insulin, triglyceride, glucose, total cholesterol, LDL-cholesterol, HDL-cholesterol and homocysteine levels were measured. Obtained data compared between groups with independent sample t-test. For evaluation of the correlation between mentioned parameters Pearson correlation coefficient method was used. RESULTS: Serum levels of LDL-C and total cholesterol significantly increased in SCH group compared to healthy control group. Homeostatic Model Assessment of Insulin Resistance (HOM-IR) and serum homocysteine level significantly elevated in patients with SCH compared to control group. There was a significant direct correlation between HOM-IR and serum homocysteine levels in SCH patients. CONCLUSION: Subclinical hypothyroidism likely have significant effect on insulin resistance as major diabetes risk factors and also cardiovascular disease risk factors such as homocysteine. The direct correlation between HOM-IR with serum homocysteine level indicate the possible role of insulin resistance in elevation of serum homocysteine in SCH patient group.
BACKGROUND: Subclinical hypothyroidism known as mild thyroid disorder without significant sign and symptoms. The correlation between subclinical hypothyroidism and some of cardiovascular disease risk factors such as serum lipids, homocysteine levels and also insulin resistance index is not well established and the current study was conducted to clarify this issue. METHODS AND MATERIALS: Seventy four patients with mild elevation in levels of thyroid stimulating hormone (TSH) along with normal levels of T3 and T4 were selected as patients group and 74 age and sex matched individuals were selected as healthy control group. Serum insulin, triglyceride, glucose, total cholesterol, LDL-cholesterol, HDL-cholesterol and homocysteine levels were measured. Obtained data compared between groups with independent sample t-test. For evaluation of the correlation between mentioned parameters Pearson correlation coefficient method was used. RESULTS: Serum levels of LDL-C and total cholesterol significantly increased in SCH group compared to healthy control group. Homeostatic Model Assessment of Insulin Resistance (HOM-IR) and serum homocysteine level significantly elevated in patients with SCH compared to control group. There was a significant direct correlation between HOM-IR and serum homocysteine levels in SCH patients. CONCLUSION: Subclinical hypothyroidism likely have significant effect on insulin resistance as major diabetes risk factors and also cardiovascular disease risk factors such as homocysteine. The direct correlation between HOM-IR with serum homocysteine level indicate the possible role of insulin resistance in elevation of serum homocysteine in SCH patient group.