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Relationship between fluid intake, hydration status and cortisol dynamics in healthy, young adult males.
Compr Psychoneuroendocrinol
February 2025
Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, Mailing address: P.O. Box 26170 Greensboro, NC, 27402-6170, USA.
Background: Previous studies have identified links between fluid intake, hydration related hormones and cortisol measured at one timepoint but have not considered how hydration may influence cortisol dynamics throughout the day. This study assessed associations between hydration status (copeptin, urinary osmolality, urine volume) and habitual fluid intake with cortisol dynamics.
Methods: The day before (DB) a 6-h laboratory visit, 29 male participants (age, 23±4y; BMI, 25.
Diurnal and daily fluctuations in levels of the urinary oxidative stress marker 8-hydroxyguanosine in spot urine samples.
Genes Environ
January 2025
Department of Environmental Oncology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan.
Background: Urinary 8-hydroxyguanosine (8-OHGuo) levels serve as a biomarker for oxidative stress and hydroxyl radical-induced RNA damage. Evaluating the diurnal and daily fluctuations in urinary 8-OHGuo excretion levels is essential for understanding its implications. However, research in this area remains limited.
View Article and Find Full Text PDFCognition in patients with mild autonomous cortisol secretion at baseline and post-adrenalectomy.
Eur J Endocrinol
November 2024
Division of Endocrinology, Metabolism, and Nutrition, Mayo Clinic, Rochester, MN 55905, United States.
Objectives: The impact of mild autonomous cortisol secretion (MACS) on cognition is incompletely characterized. We aimed to assess cognition in patients with MACS, identify factors associated with lower cognition, and determine the impact of adrenalectomy on cognition.
Methods: We conducted a cross-sectional study (4/2019 to 10/2022) and a longitudinal cohort study (10/2021 to 9/2023) of adults with MACS and referent subjects.
Murine vaginal secretory responses to a male volatile chemical messenger.
Sci Rep
November 2024
Gill Institute for Neuroscience, Department of Psychological and Brain Sciences, Indiana University, Bloomington, 1101 E 10th St, IN 47405, USA.
Many species use chemical messengers to communicate a remarkable range of information. Mice appear to make particular use of chemical messengers, including effects on estrous cycling and initiation, pregnancy, aggression, stress and of course attraction. Behavioral studies have helped identify several candidate messengers, or pheromones, that mediate attraction in mice.
View Article and Find Full Text PDFSex differences in the adrenal circadian clock: a role for BMAL1 in the regulation of urinary aldosterone excretion and renal electrolyte balance in mice.
Am J Physiol Renal Physiol
January 2025
Department of Physiology and Aging, University of Florida, Gainesville, Florida, United States.
Brain and muscle ARNT-Like 1 (BMAL1) is a circadian clock transcription factor that regulates physiological functions. Male adrenal-specific () KO mice displayed blunted serum corticosterone rhythms, altered blood pressure rhythm, and altered timing of eating, but there is a lack of knowledge in females. This study investigates the role of adrenal BMAL1 in renal electrolyte handling and urinary aldosterone levels in response to low salt in male and female mice.
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