Challenges and novel approaches for investigating molecular mediation.

Abstract:

:Understanding mediation is useful for identifying intermediates lying between an exposure and an outcome which, when intervened upon, will block (some or all of) the causal pathway between the exposure and outcome. Mediation approaches used in conventional epidemiology have been adapted to understanding the role of molecular intermediates in situations of high-dimensional omics data with varying degrees of success. In particular, the limitations of observational epidemiological study including confounding, reverse causation and measurement error can afflict conventional mediation approaches and may lead to incorrect conclusions regarding causal effects. Solutions to analysing mediation which overcome these problems include the use of instrumental variable methods such as Mendelian randomization, which may be applied to evaluate causality in increasingly complex networks of omics data.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Richmond RC,Hemani G,Tilling K,Davey Smith G,Relton CL

doi

10.1093/hmg/ddw197

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

R149-R156

issue

R2

eissn

0964-6906

issn

1460-2083

pii

ddw197

journal_volume

25

pub_type

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