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Loss of Brain-Derived Estrogen Is Associated With Sex- and Age-Dependent Alterations in Memory, Affective Behavior, and Hippocampal Extracellular Matrix Gene Expression.

Overview

Authors: Natalie C. Piehl1, Ariel W. Halle1, Guadalupe Rodriguez2, Andrea Locci2, Stacy Kujawa1, Caroline Haywood1, John Coon V1, Ross P. McNally1, Zaina A. Karim1, Tianming You1, Hongxin Dong2, Serdar E. Bulun1, Hong Zhao1
ORCID iDs: Zaina A. Karim
  1. Division of Reproductive Science in Medicine, Department of Obstetrics and Gynecology, Feinberg School of Medicine Northwestern University Chicago Illinois USA
  2. Department of Psychiatry & Behavioral Sciences, Feinberg School of Medicine Northwestern University Chicago Illinois USA
Institutions: Northwestern University (United States)
Journal: Aging cell, volume 25, issue 6, article e70551
Dates: received 15 October 2025; accepted 12 May 2026; published online 26 May 2026; in print June 2026
Type: Research article · Language: English
License: CC BY
Identifiers: DOI 10.1111/acel.70551 · PMID 42186917 · PMCID PMC13239850 · OpenAlex W7162462604
Open access: gold, a free copy (OpenAlex)
Status: data only
Categories: mouse (organism), Alzheimer's / dementia (population), cellular / molecular (subfield)
Methods: Statistics, Smoothing, state filtering, decompositions
Keywords: aging, Alzheimer's disease, aromatase, estrogen, extracellular matrix, memory
MeSH: Brain*, Estrogens*, Extracellular Matrix*, Hippocampus*, Memory*, Aging, Animals, Aromatase, Female, Male, Mice, Mice, Knockout, Sex Characteristics (* major topic)
Topic: Menopause: Health Impacts and Treatments (Endocrinology, Diabetes and Metabolism, Medicine), according to OpenAlex
Funding: NIH (RF1‐AG079419)
Citations: cited by 3 papers (Europe PMC); 122 references in the paper
Research resources: RRID:SCR_020996

Abstract

Nearly two‐thirds of Americans with Alzheimer's disease (AD) are women. Prior research suggested that women with AD have lower brain estrogen levels than those without AD. However, how estrogen deficiency modulates this sex‐based difference in AD vulnerability is not well understood. Aromatase, the key enzyme for estrogen biosynthesis, is expressed in both neurons and astrocytes of the brain, including the hippocampus. This study aims to assess the mechanistic link between brain‐selective aromatase deficiency and sex‐specific AD vulnerability. To achieve this goal, we used brain‐specific aromatase knockout (bArKO) and whole‐body total aromatase knockout (tArKO) mice of both sexes at young (6‐ to 8‐month‐old) and old (> 19‐month‐old) ages. We found that aromatase deletion decreased brain estrogen levels in bArKO mice and circulating and brain estrogen levels in tArKO mice. Impairment in spatial working memory and social interaction behavior was observed only in old female bArKO and tArKO mice. Both young and old female, but not male, tArKO mice displayed depression‐like behavior. Bulk RNA‐seq analysis of hippocampal tissues from young and old bArKO mice of both sexes revealed enrichment of extracellular matrix‐related pathways and upregulated mRNA and/or protein expression of extracellular matrix‐associated genes (e.g., Col1a1, Ccn2, Dcn, and Ogn) in old female bArKO mice compared to littermate control mice. These findings point to a novel link between local brain estrogen deficiency and sex‐ and age‐specific extracellular matrix changes in the hippocampus of old bArKO female mice accompanied by AD‐related memory and behavioral impairments.

Reproduced under the paper's license (CC BY), from the paper cited above.

Code

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Data

Data links

Data Availability Statement

The bulk RNA‐seq data from this study have been deposited in the NCBI Gene Expression Omnibus (GEO) database under the accession number GSE285197 (https://www.ncbi.nlm.nih.gov/geo).

Reproduced under the paper's license (CC BY), from the paper cited above.

Versions

The history of this record: each version stored by the harvester or made by a correction of its authors or of the maintainers of its code, and what changed in its facts. The texts of the paper (its abstract, its availability statements) are not part of it; versions that changed only those are not listed.

Version 1, 27 September 2026: the first record

Recorded: type, language, journal, volume, issue, pages, dates, 13 authors, 6 keywords, 13 MeSH terms, 1 funder, 122 references, 1 RRID.

Cite

This paper

Piehl, N. C., Halle, A. W., Rodriguez, G., Locci, A., Kujawa, S., Haywood, C., Coon, J., McNally, R. P., Karim, Z. A., You, T., Dong, H., Bulun, S. E., & Zhao, H. (2026). Loss of Brain-Derived Estrogen Is Associated With Sex- and Age-Dependent Alterations in Memory, Affective Behavior, and Hippocampal Extracellular Matrix Gene Expression. Aging cell, 25(6), e70551. https://doi.org/10.1111/acel.70551

BibTeX

@article{piehl2026loss,
author = {Piehl, Natalie C. and Halle, Ariel W. and Rodriguez, Guadalupe and Locci, Andrea and Kujawa, Stacy and Haywood, Caroline and Coon, John and McNally, Ross P. and Karim, Zaina A. and You, Tianming and Dong, Hongxin and Bulun, Serdar E. and Zhao, Hong},
title = {{Loss of Brain-Derived Estrogen Is Associated With Sex- and Age-Dependent Alterations in Memory, Affective Behavior, and Hippocampal Extracellular Matrix Gene Expression}},
journal = {Aging cell},
year = {2026},
month = jun,
volume = {25},
number = {6},
pages = {e70551},
publisher = {Wiley},
issn = {1474-9718},
doi = {10.1111/acel.70551},
url = {https://doi.org/10.1111/acel.70551},
pmid = {42186917},
pmcid = {PMC13239850}
}

RIS

TY - JOUR
AU - Piehl, Natalie C.
AU - Halle, Ariel W.
AU - Rodriguez, Guadalupe
AU - Locci, Andrea
AU - Kujawa, Stacy
AU - Haywood, Caroline
AU - Coon, John
AU - McNally, Ross P.
AU - Karim, Zaina A.
AU - You, Tianming
AU - Dong, Hongxin
AU - Bulun, Serdar E.
AU - Zhao, Hong
TI - Loss of Brain-Derived Estrogen Is Associated With Sex- and Age-Dependent Alterations in Memory, Affective Behavior, and Hippocampal Extracellular Matrix Gene Expression
T2 - Aging cell
J2 - Aging Cell
PY - 2026
DA - 2026/06/01
VL - 25
IS - 6
SP - e70551
SN - 1474-9718
PB - Wiley
DO - 10.1111/acel.70551
UR - https://doi.org/10.1111/acel.70551
LA - en
ER -

CSL-JSON

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