Mapping Imprinted Genes in Human Placentas Using Triploidies
Author Information
Author(s): Yuen Ryan KC, Jiang Ruby, Peñaherrera Maria S, McFadden Deborah E, Robinson Wendy P
Primary Institution: University of British Columbia
Hypothesis
Can the comparison of diandric and digynic triploid placentas help identify and characterize imprinted differentially methylated regions (DMRs) in humans?
Conclusion
The study successfully identified novel imprinted genes and DMRs in human placentas through DNA methylation profiling of triploidies.
Supporting Evidence
- 62 genes with apparently imprinted DMRs were identified with a false discovery rate of less than 0.1%.
- 11 of the identified genes have been previously reported as imprinted.
- DNA methylation patterns were consistent with known imprinted genes.
Takeaway
Scientists looked at special types of placentas to find out which genes are turned on or off based on which parent they come from.
Methodology
DNA methylation profiling was performed using the Infinium HumanMethylation27 BeadChip array on placental samples from diandric and digynic triploidies.
Potential Biases
Potential biases may arise from differences in cell composition and the presence of multiple regulatory regions.
Limitations
The study is limited by the low coverage of CpG sites in the array, which may reduce the power to identify imprinted DMRs.
Participant Demographics
The study included placental samples from ten diandric triploids, ten digynic triploids, six complete hydatidiform moles, and ten normal controls.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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