ArticleAnnals of translational medicine2020
Effects of estrogen deprivation on memory and expression of related proteins in ovariectomized mice.
Article in Annals of translational medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 24 citations in OpenAlex.
- Article
- The link between sarcopenic obesity and Alzheimer's disease: a brain-derived neurotrophic factor point of view.The Journal of physiology · 2026Review
- Modulation of Cognitive Function by TRPM3 Channels in the Dentate Gyrus of a Menopausal Rat Model: Effects of Naringenin Treatment and Ciliary Neurotrophic Factor.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2026Article
- Activity-dependent neuroprotective protein (ADNP) derived peptide NAP prevents musculoskeletal abnormalities in ovariectomized mice.Frontiers in neuroscience · 2026Article
- Gut dysbiosis impacts estrogen levels in APP/PS1 transgenic female mice.Gut microbes · 2025Article
- Ovariectomy attenuates phenotypes related to Alzheimer's disease in a preclinical mouse model and in C57BL/6 J mice.Scientific reports · 2025Article
- Metabolomic profiles of ovariectomized mice and their associations with body composition and frailty-related parameters in postmenopausal women.Journal of endocrinological investigation · 2024Article
- Antidepressant Effect of Enzymatic Porcine Placenta Hydrolysate in Repeated Immobilization Stress-Induced Ovariectomized Female Mice.Current issues in molecular biology · 2024Article
- Sericin Improves Memory Impairment Via Activation of the PKA-CREB-BDNF Signaling Pathway and Suppression of Oxidative Stress in Ovariectomized Mice.Neurochemical research · 2024Article
- Iron dyshomeostasis and time-course changes in iron-uptake systems and ferritin level in relation to pro-inflammatory microglia polarization in sepsis-induced encephalopathy.Frontiers in physiology · 2022Article
- Emodin Promotes Autophagy and Prevents Apoptosis in Sepsis-Associated Encephalopathy through Activating BDNF/TrkB Signaling.Pathobiology : journal of immunopathology, molecular and cellular biology · 2022Article
- Treadmill Exercise Reverses the Change of Dendritic Morphology and Activates BNDF-mTOR Signaling Pathway in the Hippocampus and Cerebral Cortex of Ovariectomized Mice.Journal of molecular neuroscience : MN · 2021Article
- Osthole Ameliorates Estrogen Deficiency-Induced Cognitive Impairment in Female Mice.Frontiers in pharmacology · 2021Article
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9 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe ovariectomized (OVX) rodent model is most widely used for studying the influence of estrogen deprivation on memory. However, the results of these studies are inconsistent, in that the memory of OVX rodents shows either impairment or no change. These inconsistent outcomes increase the difficulty of researching neurochemical mechanisms and evaluating drug efficacy. One possible explanation for these discrepancies might be that the time point for memory examination after OVX varies considerably among studies. The aim of our study was to investigate the effects of estrogen deprivation on memory and the expression of memory-related proteins at different times after OVX.
methodsNovel object recognition (NOR), step-through passive avoidance (STPA) and the Morris water maze (MWM) were performed to evaluate the memory performance of mice at different times after OVX. The expressions of BDNF, TrkB, ULK1 and LC3II/LC3I in the hippocampus were also assessed to explore the relevant mechanisms.
resultsAfter OVX, a significant memory impairment was found in the STPA test at 4 weeks. In the NOR and MWM tests, however, memory deficits were not observed until 8 weeks post-OVX. Interestingly, at 8 weeks, a memory rebound was found in the STPA test. In the hippocampus, the levels of BDNF and TrkB in OVX mice were markedly decreased at 4 and 8 weeks. Subsequently, a significant decrease in the ULK1 and LC3II/LC3I level in OVX mice was observed at 8 weeks.
conclusionsMemory impairment in mice was observed as early as 4 weeks after OVX, although there was a possibility of memory rebound with the prolongation of estrogen deprivation. Eight weeks of estrogen deprivation would be more likely to induce hippocampus-dependent memory impairment. This progressive impairment of memory might be due to the downregulation of the BDNF/TrkB signaling pathway at the early post-OVX stage, while the decrease of autophagy level in the later stage might also contribute to these progressive alterations. The underlying relationship between the BDNF/TrkB signaling pathway and autophagy in this progressive impairment of memory requires further study.
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