Exome sequencing identifies variants in FKBP4 that are associated with recurrent fetal loss in humans.

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ID: 59684
2019
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Abstract
Recurrent pregnancy loss (RPL) is defined as two or more consecutive miscarriages and affects an estimated 1.5% of couples trying to conceive. RPL has been attributed to genetic, endocrine, immune and thrombophilic disorders, But many cases remain unexplained. We investigated a Bangladeshi family where the proband experienced 29 consecutive pregnancy losses with no successful pregnancies from three different marriages. Whole exome sequencing identified rare genetic variants in several candidate genes. These were further investigated in Asian and White European RPL cohorts, and in Bangladeshi controls. FKBP4, encoding the immunophilin FK506 binding protein 4, was identified as a plausible candidate, with three further novel variants identified in Asian patients. None were found in European patients or controls. In silico structural studies predicted damaging effects of the variants in the structure-function properties of the FKBP52 protein. These were located domains reported to be involved in Hsp90 binding and peptidyl-prolyl cic-trans isomerase (PPIase) activity. Profound effects on PPIase activity were demonstrated in transiently transfected HEK293 cells comparing wildtype and mutant FKBP4 constructs. Mice lacking Fkbp4 have been previously reported as infertile through implantation failure. This study therefore strongly implicates FKBP4 as associated with fetal losses in humans, particularly in the Asian population.
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demetriou2019exomehuman Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Demetriou, Charalambos;Chanudet, Estelle;, ;Joseph, Agnel;Topf, Maya;Thomas, Anna C;Bitner-Glindzicz, Maria;Regan, Lesley;Stanier, Philip;Moore, Gudrun E;
Journal Human molecular genetics
Year 2019
DOI
ddz203
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Keywords Keywords not found

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