Anna Viitasalo1, Aino-Maija Eloranta1, Mustafa Atalay1, Stefano Romeo2,3,4, Jussi Pihlajamäki5,6, Timo A Lakka1,7,8. 1. Institute of Biomedicine, Physiology, University of Eastern Finland, Kuopio, Finland. 2. Department of Molecular and Clinical Medicine, University of Gothenburg, Gothenburg, Sweden. 3. Department of Medical and Surgical Sciences, Clinical Nutrition Unit, University Magna Graecia of Catanzaro, Catanzaro, Italy. 4. Cardiology Department, Sahlgrenska University Hospital, Gothenburg, Sweden. 5. Clinical Nutrition, Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland. 6. Clinical Nutrition and Obesity Center, Kuopio University Hospital, Kuopio, Finland. 7. Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland. 8. Kuopio Research Institute of Exercise Medicine, Kuopio, Finland.
Abstract
BACKGROUND: We studied for the first time among children differences in plasma alanine aminotransferase (ALT) among genotypes of the rs641738 polymorphism in the MBOAT7 gene that has been associated with increased risk of nonalcoholic fatty liver disease among adults. We also investigated the associations of a genetic risk score combining information from the MBOAT7, PNPLA3, and TM6SF2 polymorphisms with plasma ALT. METHODS: We performed a 2-y follow-up study in 467 Caucasian children aged 6-9 y, genotyped the MBOAT7, PNPLA3, and TM6SF2 polymorphisms, calculated a genetic risk score from these polymorphisms (scored 0-3) and assessed plasma ALT. RESULTS: Children carrying the T allele of the MBOAT7 polymorphism had 7% higher plasma ALT at baseline (17.8 vs. 19.1 U/l, P = 0.022) and 10% higher plasma ALT at 2-y follow-up (18.0 vs. 19.7 U/l, P = 0.022) than the noncarriers. A higher genetic risk score was associated with higher plasma ALT at baseline (17.5, 18.5, 19.2, and 22.8 U/l, P = 0.008 for linear trend) and 2-y follow-up (18.2, 18.9, 18.9, and 32.8 U/l, P = 0.017 for linear trend). CONCLUSION: Children carrying the T allele of the MBOAT7 polymorphism had higher plasma ALT than the noncarriers. Children with the MBOAT7, PNPLA3, and TM6SF2 variants had the highest plasma ALT.
BACKGROUND: We studied for the first time among children differences in plasma alanine aminotransferase (ALT) among genotypes of the rs641738 polymorphism in the MBOAT7 gene that has been associated with increased risk of nonalcoholic fatty liver disease among adults. We also investigated the associations of a genetic risk score combining information from the MBOAT7, PNPLA3, and TM6SF2 polymorphisms with plasma ALT. METHODS: We performed a 2-y follow-up study in 467 Caucasian children aged 6-9 y, genotyped the MBOAT7, PNPLA3, and TM6SF2 polymorphisms, calculated a genetic risk score from these polymorphisms (scored 0-3) and assessed plasma ALT. RESULTS:Children carrying the T allele of the MBOAT7 polymorphism had 7% higher plasma ALT at baseline (17.8 vs. 19.1 U/l, P = 0.022) and 10% higher plasma ALT at 2-y follow-up (18.0 vs. 19.7 U/l, P = 0.022) than the noncarriers. A higher genetic risk score was associated with higher plasma ALT at baseline (17.5, 18.5, 19.2, and 22.8 U/l, P = 0.008 for linear trend) and 2-y follow-up (18.2, 18.9, 18.9, and 32.8 U/l, P = 0.017 for linear trend). CONCLUSION:Children carrying the T allele of the MBOAT7 polymorphism had higher plasma ALT than the noncarriers. Children with the MBOAT7, PNPLA3, and TM6SF2 variants had the highest plasma ALT.
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