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• W4306670654 abstract "Abstract Background Genetic variation at the MTIF3 (Mitochondrial Translational Initiation Factor 3) locus has been robustly associated with obesity in humans, but the functional basis behind this association is not known. Methods Here, we applied luciferase reporter assay to map potential functional variants in the haplotype block tagged by rs1885988 and used CRISPR-Cas9 to edit the potential functional variants to confirm the regulatory effects on MTIF3 expression. We further conducted functional studies on MTIF3-deficient differentiated human white adipocyte cell line (hWAs-iCas9), generated through inducible expression of CRISPR-Cas9 combined with delivery of synthetic MTIF3 -targeting guide RNA. Results We demonstrate that rs67785913-centered DNA fragment (in LD with rs1885988, r 2 >0.8) enhances transcription in a luciferase reporter assay, and CRISPR/Cas9 edited rs67785913 CTCT cells show significantly higher MTIF3 expression than rs67785913 CT cells. Perturbed MTIF3 expression changed the expression of mitochondrial DNA-encoded genes, and reduced mitochondrial respiration, as well as altered endogenous fatty acid oxidation. Furthermore, after glucose restriction, the MTIF3 knockout cells retained more triglycerides than control cells. Conclusions This study demonstrates an adipocyte function-specific role of MTIF3 , which originates in the maintenance of mitochondrial function, providing potential explanations for why MTIF3 genetic variation at rs67785913 is associated with body corpulence and response to weight loss interventions." @default.
• W4306670654 created "2022-10-19" @default.
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• W4306670654 date "2022-10-17" @default.
• W4306670654 modified "2023-09-27" @default.
• W4306670654 title "Identification of a weight loss-associated causal eQTL in<i>MTIF3</i>and the effects of<i>MTIF3</i>deficiency on human adipocyte function" @default.
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• W4306670654 doi "https://doi.org/10.1101/2022.10.16.512435" @default.
• W4306670654 hasPublicationYear "2022" @default.
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