• Golnaz Vaseghi, Zahra Malakoutikhah, Zahra Shafiee, Mojgan Gharipour, Laleh Shariati, Ladan Sadeghian, Elham Khosravi, Shaghayegh Haghjooy Javanmard, Ali Pourmoghaddas, Ismail Laher, Sonia Zarfeshani, and Nizal Sarrafzadegan.
• Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.
• J Res Med Sci. 2021 Jan 1; 26: 94.

BackgroundFamilial hypercholesterolemia (FH) leads to elevated low-density lipoprotein cholesterol (LDL-C) levels in plasma. Mutations of its related gene; apolipoprotein B (APOB) is seen in about two percent of the patient with FH. Thyroid disease is usually part of the exclusion criteria for the detection of FH which alters the lipid profile. We evaluated mutations in the APOB gene in patients with high LDL-C levels.Materials And MethodsPatients aged between 2 and 80 years with at least one LDL-C level of more than 190 mg/dl were selected (120 patients) from Isfahan Laboratories. Blood samples were obtained from all patients. Genomic DNA was extracted. Primer sequences were designed by Oligo 7.60 to amplify the desired 844 bp region of exon 26 of the APOB gene containing R3500Q and R3500W variants associated with FH.ResultsOverall, two patients showed a heterozygous form of a common pathogenic variant in exon 26 named c. 10579 C > T (R3500W, cDNA.10707), and one patient was hypothyroidism. We also recognized another nonpathognomonic variant c. 10913G > A (rs1801701, cDNA.11041) in 13 patients, two of them were hypothyroidism.ConclusionThis study for the first time shows the coexistence of APOB mutation in hypothyroidism, which emphasis screening of patients with hypothyroid for FH detection.Copyright: © 2021 Journal of Research in Medical Sciences.

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