Gray matter volume in women with the BRCA mutation with and without ovarian removal: evidence for increased risk of late-life Alzheimer's disease or dementia
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View abstract on PubMed
Summary
This summary is machine-generated.Early ovarian removal in BRCA mutation carriers may increase dementia risk. Post-surgery estradiol therapy appears to mitigate gray matter loss, suggesting potential neuroprotection.
Area Of Science
- Neuroscience
- Oncology
- Endocrinology
Background
- Ovarian removal before natural menopause is linked to higher dementia risk, possibly due to lost estradiol.
- Women with BRCA mutations undergo oophorectomy to reduce cancer risk, but neurological effects are understudied.
- Previous studies suggest cortical thinning and cognitive changes after oophorectomy.
Purpose Of The Study
- To investigate whole-brain gray matter volume differences in women with BRCA mutations before and after oophorectomy.
- To compare neurological effects of oophorectomy with and without estradiol hormone therapy.
- To assess the impact of BRCA mutations and early oophorectomy on brain structure.
Main Methods
- Cross-sectional study using high-resolution quantitative MRI.
- Compared gray matter volume in four groups: BRCA-positive pre-oophorectomy, post-oophorectomy without hormone therapy, post-oophorectomy with hormone therapy, and age-matched controls.
- Analyzed whole-brain gray matter differences.
Main Results
- Women with BRCA mutations (pre- and post-oophorectomy) showed significantly lower gray matter volume in medial temporal and frontal lobes.
- Post-oophorectomy estradiol therapy group had fewer gray matter volume reductions compared to controls.
- All BRCA mutation groups exhibited higher gray matter volume than controls, indicating plasticity.
Conclusions
- BRCA mutations and early oophorectomy may contribute to increased late-life dementia risk.
- Post-surgical estradiol therapy may help reduce gray matter loss in BRCA carriers who undergo oophorectomy.
- Findings support the role of estradiol in maintaining brain structure and potentially mitigating dementia risk.
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