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Insights on imprinting from beyond mice and men
1Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT, USA. andrew.pask@uconn.edu
Methods in Molecular Biology (Clifton, N.J.)
|August 22, 2012
Summary
Genomic imprinting, an epigenetic silencing of genes based on parent origin, is unique to mammals. Studying its presence across different mammal groups helps explain its evolutionary origins and links to nutrient provisioning.
Area of Science:
- Epigenetics
- Genomics
- Evolutionary Biology
Background:
- Genomic imprinting silences genes based on parental origin.
- This epigenetic phenomenon is found in mammals (eutherians and marsupials) but not monotremes.
- Hypotheses suggest imprinting evolved to regulate nutrient provisioning to the conceptus.
Purpose of the Study:
- To investigate the evolutionary origins of genomic imprinting in mammals.
- To test hypotheses linking imprinting to nutrient provisioning strategies.
- To explore genomic changes associated with imprinting evolution across mammalian lineages.
Main Methods:
- Comparative analysis of genomic imprinting across eutherian, marsupial, and monotreme mammals.
- Examination of reproductive strategies and nutrient provisioning in these groups.
- Genomic sequencing and analysis to identify imprinting patterns and associated changes.
Main Results:
- Genomic imprinting is present in marsupials and eutherians, but absent in monotremes.
- Reproductive strategies and nutrient provisioning vary significantly across the three mammalian lineages.
- The study provides a framework for understanding the evolution of imprinting in relation to these variations.
Conclusions:
- Genomic imprinting's evolution in mammals is likely linked to diverse nutrient provisioning strategies.
- Comparing imprinting across mammalian groups offers insights into its adaptive significance.
- Further research can elucidate the specific genomic mechanisms driving imprinting evolution.
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