Intrauterine growth restriction causes abnormal embryonic dentate gyrus neurogenesis in mouse offspring that leads to adult learning and memory deficits

Ashley S. Brown, Matthew Wieben, Shelby Murdock, Jill Chang, Maria L.V. Dizon, Mark St Pierre, Raul Chavez-Valdez, Richard I. Dorsky, Camille M. Fung

Research output: Contribution to journalArticlepeer-review

Abstract

Human infants who suffer from intrauterine growth restriction (IUGR), which is a failure to attain their genetically predetermined weight, are at increased risk for postnatal learning and memory deficits. Hippocampal dentate gyrus (DG) granule neurons play an important role in memory formation; however, it is unknown whether IUGR affects embryonic DG neurogenesis, which could provide a potential mechanism underlying abnormal postnatal learning and memory function. Using a mouse model of the most common cause of IUGR, induced by hypertensive disease of pregnancy, we first assessed adult learning and memory function. We quantified the percentages of embryonic hippocampal DG neural stem cells (NSCs) and progenitor cells and developing glutamatergic granule neurons, as well as hippocampal volumes and neuron cell count and morphology 18 and 40 d after delivery. We characterized the differential embryonic hippocampal transcriptomic pathways between appropriately grown and IUGR mouse offspring. We found that IUGR offspring of both sexes had short-term adult learning and memory deficits. Prenatally, we found that IUGR caused accelerated embryonic DG neurogenesis and Sox2+ neural stem cell depletion. IUGR mice were marked by decreased hippocampal volumes and decreased doublecortin+ neuronal progenitors with increased mean dendritic lengths at postnatal day 18. Consistent with its known molecular role in embryonic DG neurogenesis, we also found evidence for decreased Wnt pathway activity during IUGR. In conclusion, we have discovered that postnatal memory deficits are associated with accelerated NSC differentiation and maturation into glutamatergic granule neurons following IUGR, a phenotype that could be explained by decreased embryonic Wnt signaling.

Original languageEnglish (US)
Article numberENEURO.0062-21.2021
JournaleNeuro
Volume8
Issue number5
DOIs
StatePublished - Sep 1 2021

Keywords

  • Embryonic dentate gyrus neurogenesis
  • Fetal growth restriction
  • Hypertensive disease of pregnancy
  • Intrauterine growth restriction
  • Learning and memory
  • Neural stem cell

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint

Dive into the research topics of 'Intrauterine growth restriction causes abnormal embryonic dentate gyrus neurogenesis in mouse offspring that leads to adult learning and memory deficits'. Together they form a unique fingerprint.

Cite this