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Does the fetal genotype affect maternal physiology during pregnancy?
Clive J Petry1, Ken K Ong, David B Dunger
1Department of Paediatrics, University of Cambridge, Cambridge, CB2 0QQ, UK. cjp1002@cam.ac.uk
Trends in Molecular Medicine
|September 29, 2007
Summary
Fetal genes can influence maternal physiology, impacting pregnancy conditions like pregnancy-induced hypertension and gestational diabetes. This challenges traditional views, suggesting fetal genetic factors play a direct role in maternal health during pregnancy.
Area of Science:
- Reproductive biology
- Developmental genetics
- Maternal-fetal medicine
Background:
- Traditionally, maternal factors (genotype, environment) are believed to influence fetal growth and pregnancy diseases like pregnancy-induced hypertension (PIH) and gestational diabetes (GDM).
- This perspective overlooks potential fetal influences on maternal physiology.
- Recent findings suggest a bidirectional communication pathway.
Purpose of the Study:
- To investigate the hypothesis that fetal genetic variations can directly modify maternal physiology.
- To explore the role of this fetal-to-maternal signaling in the etiology of PIH and GDM.
- To challenge conventional understanding of pregnancy disease development.
Main Methods:
- Analysis of human cases: mothers with macrosomic offspring and Beckwith Wiedemann syndrome.
- Experimental studies in pregnant mice with p57(kip2)-null offspring.
- Observational and comparative analyses of maternal and fetal physiological parameters.
Main Results:
- Evidence from human and mouse models indicates fetal genetic variations can alter maternal physiology.
- These alterations appear to optimize nutrient delivery to the fetus, promoting fetal growth.
- This represents a novel mechanism of inter-individual physiological influence within the same species.
Conclusions:
- Fetal genome variation can directly impact maternal physiology, a phenomenon previously undocumented.
- This fetal-driven mechanism may contribute significantly to the development of pregnancy complications such as PIH and GDM.
- The findings necessitate a re-evaluation of the etiological factors in pregnancy-related diseases.
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