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Biomarkers.
Alzheimers Dement
December 2024
German Center for Neurodegenerative Diseases (DZNE), Dresden, Germany.
Background: Increased stress, a proposed risk factor for Alzheimer's disease (AD), is associated with increased brain and cognitive vulnerabilities in older populations, which may be different in women and men.
Objective: To examine cross-sectional associations between circulating stress hormones (epinephrine, norepinephrine, cortisol, dehydroepiandrosterone sulfate (DHEAS), and DHEAS/cortisol ratio) and multimodal measures of brain health and cognition sensitive to AD.
Method: 132 cognitively unimpaired older participants without clinical depression (age = 74.
Biomarkers.
Alzheimers Dement
December 2024
Alzheimer's disease and other cognitive disorders unit, Hospital Clínic, IDIBAPS, Barcelona, Spain.
Background: Sleep-wake alterations are common symptoms in Alzheimer's Disease (AD) associated with faster cognitive decline. Noradrenaline dysfunction and neuroinflammation have been proposed as potential driving mechanisms. The ADIS project aims to study the relationship between sleep-wake patterns, immune signatures (peripheral blood cytotoxic lymphocytes), and noradrenergic markers across the AD spectrum.
View Article and Find Full Text PDFBackground: Alzheimer's disease (AD) is a neurodegenerative disorder without a cure. Targeting this multifactorial disease by repurposing FDA approved drugs serves as a faster mode of treatment due to its pre-established human safety. We tested terazosin (TZ), an a-1 adrenergic receptor (AR) antagonist and phosphoglycerate kinase-1 (PGK1) activator as having potential to treat AD.
View Article and Find Full Text PDF[Cardiac β-adrenergic receptor regulation of mitochondrial function in heart failure].
Sheng Li Xue Bao
December 2024
Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Institute of Advanced Clinical Medicine, Peking University; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
Heart failure is characterized by abnormal β-adrenergic receptor (β-AR) activation and mitochondrial dysfunction. In heart failure, overactivation of β-AR mediates key pathological processes in cardiomyocytes, including oxidative stress, calcium overload and metabolic abnormalities, which subsequently lead to inflammation, myocardial apoptosis and necrosis. Mitochondria are the core organelles for energy metabolism, and also play a vital role in calcium homeostasis, redox balance and signaling transduction.
View Article and Find Full Text PDFEffect of phenylephrine infusion on postpartum blood loss after cesarean delivery: A Placebo-controlled, randomized clinical trial.
Am J Obstet Gynecol MFM
January 2025
Department of Anaesthesiology and Critical Care, Jawaharlal Institute of Post Graduate Medical Education and Research, Puducherry, India. Electronic address:
Background: Preclinical studies have documented the role of alpha-adrenergic agonists in myometrial contraction. Phenylephrine is frequently used to prevent and treat post-spinal hypotension during cesarean delivery. We hypothesized phenylephrine would reduce postpartum blood loss due to alpha-1 receptor-mediated uterine and vascular smooth muscle contraction.
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