Cited by 22Adipose Tissue and MetabolismGenetic Associations and EpidemiologyAdipokines, Inflammation, and Metabolic Diseases

The Impact of Early Human Migration on Brown Adipose Tissue Evolution and Its Relevance to the Modern Obesity Pandemic

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Sellayah, Dyan·2019·Journal of the Endocrine Society

Abstract

Genetic factors are believed to be primarily responsible for obesity; however, an understanding of how genes for obesity have become so prevalent in modern society has proved elusive. Several theories have attempted to explain the genetic basis for obesity, but none of these appear to factor in the interethnic variation in obesity. Emerging evidence is increasingly pointing to a link between reduced basal metabolism and ineffective brown adipose tissue (BAT) thermogenesis. In fact, BAT presence and function are strongly correlated with metabolic rates and directly influence obesity susceptibility. My colleagues and I recently theorized that ancestral exposure to cold necessitated the evolution of enhanced BAT thermogenesis, which, with today's hypercaloric and sedentary lifestyle, becomes advantageous, because thermogenesis is energetically wasteful, raising basal metabolism and burning excess calories. The opposite may be true for the descendants of heat-adapted populations. This review further reconciles global evolutionary climatic exposures with obesity demographics to understand the genetic basis for the obesity pandemic, and new insights from the most recent studies are provided, including those assessing archaic human admixture. Key genetic variants influencing BAT thermogenesis are outlined that have also been linked with climatic exposure to cold and appear to support the theory that evolutionary factors relevant to climate may have shaped the modern obesity pandemic.

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  • Multiple lines of evidence from evolutionary history, genetic and twin studies support a genetic basis for obesity and differences in obese and lean phenotypes in women with PCOS.

    “Multiple lines of evidence from evolutionary history, genetic and twin studies, support a genetic basis for obesity and differences in obese and lean phenotypes in women with PCOS [183,184,185,186].”

    From Polycystic Ovary Syndrome: An Evolutionary Adaptation to Lifestyle and the Environment (2022) · cites this paper as [183]

    The Abstract reports twin-study evidence for heritable susceptibility to obesity, and “Toward a Unifying Theory” discusses genetic and evolutionary explanations for differences in obesity susceptibility. These passages concern obesity generally; they do not establish a genetic basis for the difference between obese and lean phenotypes in women with PCOS. (LLM, conf=0.88)

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Authors
Sellayah, D.
Affiliations
University of Reading (GB)
Corresponding author
Sellayah, Dyan
Venue
Journal of the Endocrine Society
Published
2018-12-18
Volume
3
Issue
2
Pages
372-386
ISSN
2472-1972 (ISSN-L)
OpenAlex
W2914276376
Cited by
21
References
104
Citations by year
2025: 8 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 4 · 2020: 1 · 2019: 1
FWCI
0.20
Type
journal article
Language
en
Open access
Locations
  • Journal of the Endocrine Society (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • CentAUR (University of Reading) (submittedVersion)
Funders
Medical Research Foundation (MR/P011683/1)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
brown adipose tissue, thermogenesis, obesity, human migration, cold adaptation, heat adaptation, climate exposure, basal metabolic rate, obesity genetics, archaic human admixture, genetic variants

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