Cited by 53Adipose Tissue and MetabolismMitochondrial Function and PathologyDiabetes, Cardiovascular Risks, and Lipoproteins

Could mitochondrial efficiency explain the susceptibility to adiposity, metabolic syndrome, diabetes and cardiovascular diseases in South Asian populations?

Bhopal, R. S, Rafnsson, S. B·2009·International Journal of Epidemiology

Abstract

BACKGROUND: South Asians are susceptible to cardiovascular disease (CVD), especially after migration to affluent countries. Contributing factors include high prevalence of diabetes, and possibly insulin resistance. Excess adiposity centrally may underlie such metabolic disturbances. The thrifty genotype, thrifty phenotype, adipose tissue compartment and variable disease selection hypotheses are among the explanations posed. METHODS: Data from individual studies and review articles known to the authors were examined. A Medline bibliographic database search was also performed. Reference lists were reviewed to identify additional relevant data sources. Key references were examined by both authors. RESULTS: We propose, and evaluate, the evidence for a 'mitochondrial efficiency hypothesis' i.e. that ancestral changes in mitochondrial coupling efficiency enhanced the successful adaptation of South Asians to environmental stressors by maximizing the conversion of energy to adenosine triphosphate (ATP) rather than heat. This adaptation may be disadvantageous when South Asians are physically inactive and consume high-caloric diets. There is evidence that common mitochondrial mutations vary geographically. Mutations, including those affecting the function of mitochondrial uncoupling proteins (UCPs), may influence the balance of energy and heat production. These may influence basal metabolic rate (BMR), energy efficiency, the tendency to gain weight and hence metabolic disease. UCP gene polymorphisms are related to differences in BMR between African-Americans and Europeans. Similar data for South Asians are lacking but the few studies comparing BMR indicate that South Asians have a lower BMR, which is explained by a lower lean body mass, and higher fat mass. Once adjusted for body composition, BMR is similar. A high fat mass, per se, is a strategy for reducing energy use while conserving body size. Indians in the USA had higher oxidative phosphorylation capacity than Northern European Americans. CONCLUSION: The evidence justifies full exploration of this mitochondrial efficiency hypothesis in South Asians, which may also be relevant to other warm-climate adapted populations.

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Crossref · 10.1093/ije/dyp202

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  • mtDNA mutations are associated with atherosclerosis, hypertension, type 2 diabetes, cardiovascular disease, and obesity.

    “Moreover, mtDNA mutations have been associated with the development of chronic human diseases, such as atherosclerosis, hypertension, T2DM, cardiovascular disease and obesity175–178.”

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Authors
Bhopal, R. S., & Rafnsson, S. B.
Affiliations
University of Edinburgh (GB)
Corresponding author
Rafnsson, S. B
Venue
International Journal of Epidemiology
Published
2009-05-07
Volume
38
Issue
4
Pages
1072-1081
ISSN
  • 0300-5771 (ISSN-L)
  • 1464-3685
OpenAlex
W2162961735
Cited by
53
References
78
Citations by year
2025: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2020: 4 · 2018: 3 · 2017: 2 · 2016: 6 · 2015: 4 · 2014: 4 · 2013: 6 · 2012: 7
FWCI
0.66
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Epidemiology (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • ERA (submittedVersion)
Funders
University of Edinburgh
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
South Asians, adiposity, metabolic syndrome, diabetes mellitus, cardiovascular disease, mitochondrial uncoupling proteins, basal metabolic rate, energy conservation, thrifty phenotype, mitochondrial mutations, oxidative phosphorylation, fat mass, insulin resistance
MeSH terms
Uncoupling Protein 1, Asia, Cardiovascular Diseases, Disease Susceptibility, DNA, Mitochondrial, Energy Metabolism, Humans, Ion Channels, Mitochondria, Mutation, Obesity, Thermogenesis, Mitochondrial Proteins, Metabolic Syndrome, Adiposity

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