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Association of Medial Temporal Lobe Cerebrovascular Reactivity and Memory Function in Older Adults With and Without Cognitive Impairment.
Neurology
January 2025
Leonard Davis School of Gerontology, University of Southern California, Los Angeles.
Background And Objectives: Cerebrovascular reactivity (CVR) represents the ability of cerebral blood vessels to regulate blood flow in response to vasoactive stimuli and is related to cognition in cerebrovascular and neurodegenerative conditions. However, few studies have examined CVR in the medial temporal lobe, known to be affected early in Alzheimer disease and to influence memory function. We aimed to examine whether medial temporal CVR is associated with memory function in older adults with and without mild cognitive impairment (MCI).
View Article and Find Full Text PDFEndovascular laser fenestration of a frozen elephant trunk stent graft for treatment of chronic cerebral malperfusion.
Vascular
January 2025
Division of Vascular Surgery, Medical University of South Carolina, Charleston, SC, USA.
Objectives: Mal-deployment of the thoracic endovascular aortic repair (TEVAR) stent graft during a frozen elephant trunk (FET) procedure for an acute type A aortic dissection (ATAAD) leads to devastating complications. We report a hemiarch replacement with TEVAR stent graft covering the aortic arch vessels salvaged through an endovascular approach.
Methods: A 69-year-old man with ATAAD in 2018, status post-hemiarch repair with TEVAR, presented in 2023 with progressive dizziness/syncope and lower extremity hypertension with inability to tolerate anti-hypertensives.
Exploring The Formation And Permeability Of Plasmodesmata In The Liverwort, Marchantia polymorpha.
Plant Cell Physiol
December 2024
Graduate Institute of Biotechnology, National Chung Hsing University. 145 Xingda Rd., South Dist., Taichung City 40227, R.O.C, Taiwan.
Plasmodesmata are cell-wall-embedded channels that evolved in the common ancestor of land plants to increase cell-to-cell communication. Whether all the fundamental properties of plasmodesmata emerged and were inherited in all land plants at the same time is unknown. Here we show that the bryophyte Marchantia polymorpha (a non-vascular plant) forms mostly simple plasmodesmata in early-developing gemmae.
View Article and Find Full Text PDFBiomarkers.
Alzheimers Dement
December 2024
Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.
Background: Olfactory deficits are predictive of cognitive decline and dementia. Previous studies have linked brain magnetic resonance imaging markers of neurodegeneration to olfactory deficits in aging; however, these studies analyzed cross-sectional data for markers, olfaction, or both. Furthermore, potential cerebrovascular contributions to understanding why olfactory deficits predict dementia remain unexplored.
View Article and Find Full Text PDFBiomarkers.
Alzheimers Dement
December 2024
Washington University in St. Louis, School of Medicine, St. Louis, MO, USA.
Background: Autosomal dominant Alzheimer disease (ADAD) is characterized by genetic mutations affecting the beta-amyloid (Aβ) pathway. However, vascular and immune factors play important roles which are not completely understood. Understanding the function of the neurovascular unit (NVU) comprised of neurons, glial cells, and vasculature, at different disease stages appears ideal to developing and evaluating therapeutics.
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