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• W4214548082 abstract "The apolipoprotein-e4 (APOE4) gene increases risk for developing late-onset Alzheimer's disease (AD) and has been linked to increased microvascular dysfunction, including pericyte degeneration and blood-brain barrier breakdown. Platelet-derived growth factor-BB (PDGF-BB) is a glycoprotein involved in blood-brain barrier and pericyte maintenance. Increased PDGF-BB levels have been reported in white matter in AD brain tissue. However, the association between circulating levels of PDGF-BB and cerebral white matter damage in older adults remains unknown.Participants included community-dwelling older adults (age range 55-90 years, M = 73.1 years; SD =7.5; 61.0% male) from the Alzheimer's Disease Neuroimaging Initiative who underwent venipuncture and blood plasma immunoassay for PDGF-BB, brain MRI scanning with T2-FLAIR for volumetric quantification of white matter hyperintensities (WMH) and APOE4 genotyping (N = 64). Linear regression analyses examined the relationship between plasma PDGF-BB levels and WMH volume, adjusting for age, sex, intracranial volume (ICV) and stratifying by APOE4 status.Greater levels of circulating PDGF-BB were related to greater WMH volume, even after accounting for age, sex, ICV and APOE4 carrier status (p = 0.040). Nineteen (29.2%) were APOE4 carriers. When stratified by APOE4 status, the relationship between PDGF-BB and WMH volume was only significant for APOE4 carriers (p = 0.007), but not non-carriers (p = 0.448), after adjusting for age, sex and ICV.These findings reveal a differential relationship between PDGF-BB and WMH volume for APOE4 carriers versus non-carriers. The APOE4 variant leads to accelerated cerebrovascular injury and cognitive decline. Elevated levels of PDGF-BB in carriers may suggest a role for pericytes and blood-brain barrier dysfunction in white matter damage, vascular cognitive impairment and AD. Additional studies will elucidate the role of PDGF ligands and receptors in these conditions." @default.
• W4214548082 created "2022-03-02" @default.
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• W4214548082 date "2022-01-01" @default.
• W4214548082 modified "2023-10-05" @default.
• W4214548082 title "Platelet-derived growth factor-BB and white matter hyperintensity burden in APOE4 carriers" @default.
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• W4214548082 doi "https://doi.org/10.1016/j.cccb.2022.100131" @default.
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