Genetic selection of embryos that later develop the metabolic syndrome

Medical Hypotheses
M J Edwards

Abstract

THE BARKER HYPOTHESIS: Is an excellent explanation of the process where human and animal foetuses exposed to malnutrition, either by maternal malnutrition or placental insufficiency, are metabolically programmed, with selective stunting of cell differentiation and organ growth. With the postnatal excess of nutrition observed in developed countries, this irreversible programming causes metabolic syndrome, including obesity, type 2 diabetes, and hypertension. Metabolic programming involves epigenetic changes including imprinting which might be transmitted through more than one generation rather than being completely re-set or erased during reproduction. The Barker hypothesis was supported by epidemiological data that recognised no excess fetal or postnatal mortality when pregnant women were starved during the Dutch famine in World War II. This argued against the "thrifty genotype" theory introduced in 1962, which proposed that starvation selected against members of the population with less "thrifty" genes, but the survivors who had "thrifty" genes developed metabolic syndrome if they were subsequently over-nourished. EMBRYONIC/FETAL SELECTION: Embryos or early foetuses could be selected very early in pregnancy on the basis of the...Continue Reading

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Citations

Feb 19, 2014·Current Opinion in Pediatrics·Luca Lambertini
Dec 26, 2012·Proceedings of the National Academy of Sciences of the United States of America·Cheryl S RosenfeldR Michael Roberts
Jun 16, 2019·Archives of Disease in Childhood. Fetal and Neonatal Edition·Wolfgang GöpelEgbert Herting

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