@article{e53b56c68bac41f4a2a45b0a16d041ce,
title = "SMIM1 absence is associated with reduced energy expenditure and excess weight",
abstract = "BACKGROUND: Obesity rates have nearly tripled in the past 50 years, and by 2030 more than 1 billion individuals worldwide are projected to be obese. This creates a significant economic strain due to the associated non-communicable diseases. The root cause is an energy expenditure imbalance, owing to an interplay of lifestyle, environmental, and genetic factors. Obesity has a polygenic genetic architecture; however, single genetic variants with large effect size are etiological in a minority of cases. These variants allowed the discovery of novel genes and biology relevant to weight regulation and ultimately led to the development of novel specific treatments.METHODS: We used a case-control approach to determine metabolic differences between individuals homozygous for a loss-of-function genetic variant in the small integral membrane protein 1 (SMIM1) and the general population, leveraging data from five cohorts. Metabolic characterization of SMIM1-/- individuals was performed using plasma biochemistry, calorimetric chamber, and DXA scan.FINDINGS: We found that individuals homozygous for a loss-of-function genetic variant in SMIM1 gene, underlying the blood group Vel, display excess body weight, dyslipidemia, altered leptin to adiponectin ratio, increased liver enzymes, and lower thyroid hormone levels. This was accompanied by a reduction in resting energy expenditure.CONCLUSION: This research identified a novel genetic predisposition to being overweight or obese. It highlights the need to investigate the genetic causes of obesity to select the most appropriate treatment given the large cost disparity between them.FUNDING: This work was funded by the National Institute of Health Research, British Heart Foundation, and NHS Blood and Transplant.",
keywords = "blood groups, BMI, dyslipidemia, metabolism, obesity, population genetics, SMIM1, Translation to patients, Vel, weight, Leptin/blood, Loss of Function Mutation, Adiponectin/genetics, Humans, Middle Aged, Energy Metabolism/genetics, Membrane Proteins/genetics, Male, Case-Control Studies, Thyroid Hormones/blood, Obesity/genetics, Overweight/genetics, Adult, Female",
author = "Luca Stefanucci and Camous Moslemi and Tom{\'e}, {Ana R} and Samuel Virtue and Guillaume Bidault and Gleadall, {Nicholas S} and Watson, {Laura P E} and Kwa, {Jing E} and Frances Burden and Samantha Farrow and Ji Chen and Urmo V{\~o}sa and Keith Burling and Lindsay Walker and John Ord and Peter Barker and James Warner and Amy Frary and Karola Renhstrom and Ashford, {Sofie E} and Jo Piper and Gail Biggs and Erber, {Wendy N} and Hoffman, {Gary J} and Nadia Schoenmakers and Christian Erikstrup and Klaus Rieneck and Dziegiel, {Morten H} and Henrik Ullum and Vian Azzu and Michele Vacca and Aparicio, {Hugo Javier} and Qin Hui and Kelly Cho and Sun, {Yan V} and Wilson, {Peter W} and Bayraktar, {Omer A} and Antonio Vidal-Puig and Ostrowski, {Sisse R} and Astle, {William J} and Olsson, {Martin L} and Storry, {Jill R} and Pedersen, {Ole B} and Ouwehand, {Willem H} and Krishna Chatterjee and Dragana Vuckovic and Mattia Frontini and Allan Linneberg and Lisette Kogelman and Hansen, {Thomas Folkmann} and Erik S{\o}rensen and Ostrowski, {Sisse Rye} and Maria Didriksen and Dinh, {Khoa Manh} and Joseph Dowsett and Ioanna Nissen and Bjarke Feenstra and Ioanna Nissen and Th{\o}rner, {Lise Wegner} and Michael Schwinn and {DBDS Genetic Consortium}",
note = "Copyright {\textcopyright} 2024 The Author(s). Published by Elsevier Inc. All rights reserved.",
year = "2024",
month = sep,
day = "13",
doi = "10.1016/j.medj.2024.05.015",
language = "English",
volume = "5",
pages = "1083--1095.e6",
journal = "Med (New York, N.Y.)",
issn = "2666-6340",
publisher = "Cell Press",
number = "9",
}