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Journal article

FNIP1 variants associated with favorable metabolism in 1 million humans

Abstract:
Altered energy metabolism is a shared driver of cardiometabolic disease, the leading cause of death globally. Energy metabolism varies between individuals and is partly heritable. To investigate its genetic basis, here we perform exome-sequencing in 1,032,116 people from America, Europe and Asia and estimate associations of rare protein-coding variants with the triglyceride-to-high-density-lipoprotein cholesterol (TG-HDL) ratio – an energy state biomarker that we associate with diverse cardiometabolic risk factors and diseases. We identify 59 independent genes (P<1.04×10⁻⁷), enriched for liver- and adipose-expressed master regulators of energy balance, storage and metabolism, with 23 (39%) encoding approved or clinical-stage drug targets. Ultra-rare protein-truncating variants in FNIP1 (allele frequency, 0.01%), encoding a suppressor of energy expenditure and mitochondrial metabolism, associate with lower TG-HDL ratio, lower liver fat, lower glycemia, favorable fat distribution and ~60% lower odds of cardiometabolic disease. FNIP1 knockdown in primary human hepatocytes induces lipid breakdown and lysosomal gene expression, while combined hepatic knockdown of Fnip1 with its paralog Fnip2 or knockdown of its interactor Flcn protect from weight gain, reduce liver fat and enhance insulin sensitivity in high-fatdiet mice. Our study implicates the FNIP1 pathway in human energy metabolism and highlights its inhibition as a potential therapeutic strategy in cardiometabolic disease.
Publication status:
Accepted
Peer review status:
Peer reviewed

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More from this funder
Funder identifier:
https://ror.org/02wdwnk04
Grant:
CH/12/2/29428
RG/18/13/33946
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Funder identifier:
https://ror.org/03x94j517
Grant:
MC_UU_00017/2
MR/Z504543/1
MR/P02811X/1
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Funder identifier:
https://ror.org/05m8dr349
Grant:
BRC-121520014
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Funder identifier:
https://ror.org/01cwqze88
Grant:
UL1TR001878
More from this funder
Funder identifier:
https://ror.org/0187kwz08
Grant:
NIHR203312


Publisher:
Springer Nature
Journal:
Nature More from this journal
Acceptance date:
2026-06-30
EISSN:
1476-4687
ISSN:
0028-0836


Language:
English
Pubs id:
2439932
Local pid:
pubs:2439932
Deposit date:
2026-06-30
ARK identifier:


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