Abstract: Introduction: Although there is a documented social gradient for osteoporosis, the underlying mechanism(s) for
that gradient remain unknown.We propose a conceptual model based upon the allostatic load theory, to suggest
howDNA methylation (DNAm) might underpin the social gradient in osteoporosis and fracture. Wehypothesise
that social disadvantage is associated with priming of inflammatory pathways mediated by epigenetic modification
that leads to an enhanced state of inflammatory reactivity and oxidative stress, and thus places socially
disadvantaged individuals at greater risk of osteoporotic fracture.
Methods/Results: Based on a review of the literature, we present a conceptual model inwhich social disadvantage
increases stress throughout the lifespan, and engenders a proinflammatory epigenetic signature, leading to a
heightened inflammatory state that increases risk for osteoporotic fracture in disadvantaged groups that are
chronically stressed.
Conclusions: Our model proposes that, in addition to the direct biological effects exerted on bone by factors such
as physical activity and nutrition, the recognised socially patterned risk factors for osteoporosis also act via
epigenetic-mediated dysregulation of inflammation. DNAmis a dynamicmodulator of gene expression with considerable
relevance to the field of osteoporosis. Elucidating the extent to which this epigenetic mechanismtransduces
the psycho-social environment to increase the risk of osteoporotic fracture may yield novel entry points for
intervention that can be used to reduce individual and population-wide risks for osteoporotic fracture. Specifically,
an epigenetic evidence-base may strengthen the importance of lifestylemodification and stress reduction programs,
and help to reduce health inequities across social groups.
Mini abstract: Our conceptual model proposes how DNA methylation might underpin the social gradient in osteoporotic
fracture. We suggest that social disadvantage is associated with priming of inflammatory signalling
pathways, which is mediated by epigenetic modifications, leading to a chronically heightened inflammatory
state that places disadvantaged individuals at greater risk of osteoporosis.
Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria
Fuente: Bone, 2016, 84, 204-212
Editorial: Elsevier
Año de publicación: 2016
Nº de páginas: 9
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.bone.2015.12.015
ISSN: 8756-3282,1873-2763