Show simple item record

dc.contributor.authorWilkinson, Amy L
dc.contributor.authorMenelaou, Katerina
dc.contributor.authorRakoczy, Joanna
dc.contributor.authorTan, Xiu S
dc.contributor.authorWatson, Erica
dc.date.accessioned2022-01-05T16:34:22Z
dc.date.available2022-01-05T16:34:22Z
dc.date.issued2021
dc.date.submitted2021-06-11
dc.identifier.issn2296-634X
dc.identifier.other723978
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/332097
dc.description.abstractAbnormal uptake or metabolism of folate increases risk of human pregnancy complications, though the mechanism is unclear. Here, we explore how defective folate metabolism influences early development by analysing mice with the hypomorphic Mtrr gt mutation. MTRR is necessary for methyl group utilisation from folate metabolism, and the Mtrr gt allele disrupts this process. We show that the spectrum of phenotypes previously observed in Mtrr gt/gt conceptuses at embryonic day (E) 10.5 is apparent from E8.5 including developmental delay, congenital malformations, and placental phenotypes. Notably, we report misalignment of some Mtrr gt conceptuses within their implantation sites from E6.5. The degree of misorientation occurs across a continuum, with the most severe form visible upon gross dissection. Additionally, some Mtrr gt/gt conceptuses display twinning. Therefore, we implicate folate metabolism in blastocyst orientation and spacing at implantation. Skewed growth likely influences embryo development since developmental delay and heart malformations (but not defects in neural tube closure or trophoblast differentiation) associate with severe misalignment of Mtrr gt/gt conceptuses. Typically, the uterus is thought to guide conceptus orientation. To investigate a uterine effect of the Mtrr gt allele, we manipulate the maternal Mtrr genotype. Misaligned conceptuses were observed in litters of Mtrr +/+ , Mtrr +/gt , and Mtrr gt/gt mothers. While progesterone and/or BMP2 signalling might be disrupted, normal decidual morphology, patterning, and blood perfusion are evident at E6.5 regardless of conceptus orientation. These observations argue against a post-implantation uterine defect as a cause of conceptus misalignment. Since litters of Mtrr +/+ mothers display conceptus misalignment, a grandparental effect is explored. Multigenerational phenotype inheritance is characteristic of the Mtrr gt model, though the mechanism remains unclear. Genetic pedigree analysis reveals that severe conceptus skewing associates with the Mtrr genotype of either maternal grandparent. Moreover, the presence of conceptus skewing after embryo transfer into a control uterus indicates that misalignment is independent of the peri- and/or post-implantation uterus and instead is likely attributed to an embryonic mechanism that is epigenetically inherited. Overall, our data indicates that abnormal folate metabolism influences conceptus orientation over multiple generations with implications for subsequent development. This study casts light on the complex role of folate metabolism during development beyond a direct maternal effect.
dc.description.sponsorshipLister Institute of Preventative Medicine Newton International Fellowship, Royal Society AG Leventis Fund
dc.languageen
dc.publisherFrontiers Media SA
dc.subjectCell and Developmental Biology
dc.subjectMTRR
dc.subjecttrophoblast
dc.subjectdecidua
dc.subjectgrandparental effect
dc.subjecttwinning
dc.subjecttransgenerational epigenetic inheritance
dc.subjectconceptus misalignment
dc.titleDisruption of Folate Metabolism Causes Poor Alignment and Spacing of Mouse Conceptuses for Multiple Generations.
dc.typeArticle
dc.date.updated2022-01-05T16:34:21Z
prism.publicationNameFront Cell Dev Biol
prism.volume9
dc.identifier.doi10.17863/CAM.79544
dcterms.dateAccepted2021-11-16
rioxxterms.versionofrecord10.3389/fcell.2021.723978
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidWatson, Erica [0000-0003-4496-2271]
dc.identifier.eissn2296-634X
pubs.funder-project-idLister Institute of Preventive Medicine
pubs.funder-project-idRoyal Society (NF150004)
cam.issuedOnline2021-12-10


Files in this item

Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record