Genetic and environmental origins of hypospadias

TY - JOUR

T1 - Genetic and environmental origins of hypospadias

AU - Thorup, Jørgen Mogens

AU - Nordenskjöld, Agneta

AU - Hutson, John M

PY - 2014/6

Y1 - 2014/6

N2 - PURPOSE OF REVIEW: The purpose of this study was to review and comment on recent original presentations dealing with genetic and environmental factors in the cause of hypospadias.RECENT FINDINGS: The heritability is definitely high and having an affected family member is the highest identified risk factor so far. Many candidate genes and polymorphisms have been suggested for hypospadias. Some associations with hypospadias were found, and many of these were replicated inconsistently as would be expected in a complex disorder affected by both genes and environment. The consistent association of hypospadias with low birth weight, maternal hypertension, and preeclampsia suggests that placental insufficiency is a major risk factor. Maternal exposure to chemical pollutants or endocrine disruptors in high concentrations related to selected occupations or geographic areas may be additional risk factors for hypospadias, especially in genetically predisposed individuals. So far, however, no environmental chemical pollutants or endocrine disruptor with a general common impact on the risk for hypospadias in most societies has been demonstrated.SUMMARY: A major point that should be considered regarding the action of environmental toxicants in inducing hypospadias is the cumulative effects of multiple low-dose exposures. Furthermore, interactions between genetic and environmental factors may help to explain nonreplication in genetic studies of hypospadias.

AB - PURPOSE OF REVIEW: The purpose of this study was to review and comment on recent original presentations dealing with genetic and environmental factors in the cause of hypospadias.RECENT FINDINGS: The heritability is definitely high and having an affected family member is the highest identified risk factor so far. Many candidate genes and polymorphisms have been suggested for hypospadias. Some associations with hypospadias were found, and many of these were replicated inconsistently as would be expected in a complex disorder affected by both genes and environment. The consistent association of hypospadias with low birth weight, maternal hypertension, and preeclampsia suggests that placental insufficiency is a major risk factor. Maternal exposure to chemical pollutants or endocrine disruptors in high concentrations related to selected occupations or geographic areas may be additional risk factors for hypospadias, especially in genetically predisposed individuals. So far, however, no environmental chemical pollutants or endocrine disruptor with a general common impact on the risk for hypospadias in most societies has been demonstrated.SUMMARY: A major point that should be considered regarding the action of environmental toxicants in inducing hypospadias is the cumulative effects of multiple low-dose exposures. Furthermore, interactions between genetic and environmental factors may help to explain nonreplication in genetic studies of hypospadias.

U2 - 10.1097/med.0000000000000063

DO - 10.1097/med.0000000000000063

M3 - Journal article

C2 - 24722170

SN - 1752-296X

VL - 21

SP - 227

EP - 232

JO - Current Opinion in Endocrinology, Diabetes and Obesity

JF - Current Opinion in Endocrinology, Diabetes and Obesity

IS - 3

ER -