Estrogens, hormone therapy, and hippocampal volume in postmenopausal women

Alexis Wnuk, Donna L. Korol, Kirk I. Erickson

Research output: Contribution to journalReview article

26 Scopus citations

Abstract

The brain atrophies in late life. However, there are many factors that either magnify or mitigate the rate of atrophy. Loss of estrogens during menopause and administration of hormone therapy have both been hypothesized as sources of individual variation in the prevalence of cortical and subcortical atrophy and loss of cognitive function in late adulthood. In this review we critically summarize and assess the extant rodent and human neuroimaging studies that examine the link between estrogens and hippocampal morphology and function and focus predominantly on human studies of the hippocampus in postmenopausal women. Several cross-sectional studies report that the size of the hippocampus is larger in women receiving hormone therapy while several other cross-sectional studies report either negligible effects or smaller volumes in women receiving hormone therapy. We suggest that these differences might be caused by the variation between studies in the age of the samples studied, the duration of therapy, and the age at which hormone therapy is initiated. Unfortunately, all of the human studies reviewed here are cross-sectional in nature. With the lack of well-controlled randomized trials with neuroimaging measures on postmenopausal women both before and after some exposure interval, the effect of hormone therapy on hippocampal atrophy will remain equivocal and poorly understood.

Original languageEnglish (US)
Pages (from-to)186-190
Number of pages5
JournalMaturitas
Volume73
Issue number3
DOIs
StatePublished - Nov 2012

Keywords

  • Brain
  • Estrogen
  • Hippocampus
  • Hormone therapy
  • Volume

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Obstetrics and Gynecology

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