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Analyses stratified by maternal age and recombination further characterize genes associated with maternal nondisjunction of chromosome 21
Author(s) -
Chernus Jonathan M.,
Sherman Stephanie L.,
Feingold Eleanor
Publication year - 2021
Publication title -
prenatal diagnosis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.956
H-Index - 97
eISSN - 1097-0223
pISSN - 0197-3851
DOI - 10.1002/pd.5919
Subject(s) - nondisjunction , genetics , biology , meiosis , genome wide association study , chromosome , gene , genetic association , chromosome 21 , human genetics , aneuploidy , genotype , single nucleotide polymorphism
Objective In our previous work, we performed the first genome‐wide association study to find genetic risk factors for maternal nondisjunction of chromosome 21. The objective of the current work was to perform stratified analyses of the same dataset to further elucidate potential mechanisms of genetic risk factors. Methods We focused on loci that were statistically significantly associated with maternal nondisjunction based on this same dataset in our previous study and performed stratified association analyses in seven subgroups defined by age and meiotic recombination profile. In each analysis, we contrasted a different subgroup of mothers with the same set of fathers, the mothers serving as cases (phenotype: meiotic nondisjunction of chromosome 21) and the fathers as controls. Results Our stratified analyses identified several genes whose patterns of association are consistent with generalized effects across groups, as well as other genes that are consistent with specific effects in certain groups. Conclusions While our results are epidemiological in nature and cannot conclusively prove mechanisms, we identified a number of patterns that are consistent with specific mechanisms. In many cases those mechanisms are strongly supported by available literature on the associated genes.