The combined effects of cholesteryl ester transfer protein (CETP) TaqIB gene polymorphism and canola, sesame and sesame-canola oils consumption on metabolic response in patients with diabetes and healthy people.

Nahid Ramezani-Jolfaie,Alireza Zimorovat,Hassan Mozaffari-Khosravi,Mojgan Amiri,Shiva Aghaei,Ali Moradi,Fatemeh Moghtaderi,Amin Salehi-Abargouei,Ehsan Farashahi Yazd,Seyed Ali Yasini Ardakani,Hamidreza Raeisi-Dehkordi

doi:10.34172/jcvtr.2020.32

Abstract

Introduction: Cholesteryl ester transfer protein (CETP) is a key regulating enzyme in the lipid metabolism pathway, and its gene polymorphism may be a candidate for modulating the metabolic responses to dietary intervention. We thus examined whether the effects of the CETP TaqIB polymorphism on metabolic profiles were modified by dietary plant oils. Methods: This is a retrospective analysis of data collected during a randomized triple-blind cross over trial. A total of 95 patients with type 2 diabetes and 73 non-diabetes individuals completed a 9-weekof the intake of sesame, canola and sesame-canola oils. Blood samples were collected at the beginning and at the end of each intervention period for biochemical analysis. Genotyping was done using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Results: In diabetes patients, B1B1 homozygotes of the CETP TaqIB polymorphism compared with B2 carriers (B1B2 + B2B2) had significantly lower diastolic blood pressure, apoB and apoB: apoA-1,and higher Lp(a) after the intake of sesame-canola oil, as well as lower insulin and HOMA-IR after the intake of sesame oil. There was also a significant effect of genotype on adjusted changes of apoB, apoB: apoA-1, insulin, HOMA-IR and QUICKI. A significant genotype-dietary oils combined effects were observed for diastolic blood pressure, and LDL: HDL, TC: HDL and TG: HDL ratios in diabetes patients. No independent or combined effects of dietary oils and genotypes on outcomes were found in healthy people. Conclusion: There was a modulatory effect of the CETP TaqIB polymorphism on some metabolic traits in response to plant oils in patients with diabetes. Taken together, the intake of sesame-canola and canola oils showed more favorable effects in diabetes patients with B1B1 genotype. Future investigations are needed to confirm these results.

Highlights

Cholesteryl ester transfer protein (CETP) is a key regulating enzyme in the lipid metabolism pathway, and its gene polymorphism may be a candidate for modulating the metabolic responses to dietary intervention
The mean intake of MUFAs and polyunsaturated fatty acids (PUFAs) in diabetes patients and saturated fatty acids (SFAs) in healthy people considerably differ between the intervention periods (Table S2)
In patients with type 2 diabetes, we found generally a significant genotype effect; such that individuals with B1B1 genotype showed a significant decrease in apoB, apoB: apoA-1, insulin, and HOMA-IR and an increase in QUICKI compared with B2B2 homozygotes

Summary

Introduction

Cholesteryl ester transfer protein (CETP) is a key regulating enzyme in the lipid metabolism pathway, and its gene polymorphism may be a candidate for modulating the metabolic responses to dietary intervention. Results: In diabetes patients, B1B1 homozygotes of the CETP TaqIB polymorphism compared with B2 carriers (B1B2 + B2B2) had significantly lower diastolic blood pressure, apoB and apoB: apoA-1, and higher Lp(a) after the intake of sesame-canola oil, as well as lower insulin and HOMA-IR after the intake of sesame oil. Ramezani-Jolfaie et al environmental factors (e.g. dietary intake) that justified different individual responses to dietary interventions in general.[11] Genetic variations including single-nucleotide polymorphisms (SNPs) in the genes that encode proteins involved in lipid and glycemic metabolism, may play a major role in changes in metabolic profile.[12]

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