26/11/2021 19:16

NOTICIAS CIENCIAS FISIOLÓGICAS

RSS American Journal Of Physiology
RSS Journal of Physiology
RSS Frontiers in Physiology
  • A Spatial Model of Hepatic Calcium Signaling and Glucose Metabolism Under Autonomic Control Reveals Functional Consequences of Varying Liver Innervation Patterns Across Species
    Rapid breakdown of hepatic glycogen stores into glucose plays an important role during intense physical exercise to maintain systemic euglycemia. Hepatic glycogenolysis is governed by several different liver-intrinsic and systemic factors such as hepatic zonation, circulating catecholamines, hepatocellular calcium signaling, hepatic neuroanatomy, and the central nervous system (CNS). Of the factors regulating hepatic glycogenolysis, the […]
  • Excessive Accumulation of Intracellular Ca2+ After Acute Exercise Potentiated Impairment of T-cell Function
    Ca2+ is an important intracellular second messenger known to regulate several cellular functions. This research aimed to investigate the mechanisms of exercise-induced immunosuppression by measuring intracellular calcium levels, Ca2+-regulating gene expression, and agonist-evoked proliferation of murine splenic T lymphocytes. Mice were randomly assigned to the control, sedentary group (C), and three experimental groups, which performed […]
  • Cancer—A Major Cardiac Comorbidity With Implications on Cardiovascular Metabolism
    Cardiovascular diseases have multifactorial causes. Classical cardiovascular risk factors, such as arterial hypertension, smoking, hyperlipidemia, and diabetes associate with the development of vascular stenoses and coronary heart disease. Further comorbidities and its impact on cardiovascular metabolism have gotten more attention recently. Thus, also cancer biology may affect the heart, apart from cardiotoxic side effects of […]
  • Aging Affects KV7 Channels and Perivascular Adipose Tissue-Mediated Vascular Tone
    Aging is an independent risk factor for hypertension, cardiovascular morbidity, and mortality. However, detailed mechanisms linking aging to cardiovascular disease are unclear. We studied the aging effects on the role of perivascular adipose tissue and downstream vasoconstriction targets, voltage-dependent KV7 channels, and their pharmacological modulators (flupirtine, retigabine, QO58, and QO58-lysine) in a murine model. We […]
  • A Reappraisal of Ventilatory Thresholds in Wheelchair Athletes With a Spinal Cord Injury: Do They Really Exist?
    The ventilatory threshold (VT) separates low- from moderate-intensity exercise, the respiratory compensation point (RCP) moderate- from high-intensity exercise. Both concepts assume breakpoints in respiratory data. However, the objective determination of the VT and RCP using breakpoint models during upper-body modality exercise in wheelchair athletes with spinal cord injury (SCI) has received little attention. Therefore, the […]
  • Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events
    Advances in tag technology now make it possible to monitor the behavior of small groups of individual fish as bioindicators of population wellbeing in commercial aquaculture settings. For example, tags may detect unusual patterns in fish heart rate, which could serve as an early indicator of whether fish health or welfare is becoming compromised. Here, […]
  • Airway Epithelial Innate Immunity
    Besides providing an essential protective barrier, airway epithelial cells directly sense pathogens and respond defensively. This is a frontline component of the innate immune system with specificity for different pathogen classes. It occurs in the context of numerous interactions with leukocytes, but here we focus on intrinsic epithelial mechanisms. Type 1 immune responses are directed […]
  • From Fast Oscillations to Circadian Rhythms: Coupling at Multiscale Frequency Bands in the Rodent Subcortical Visual System
    The subcortical visual system (SVS) is a unique collection of brain structures localised in the thalamus, hypothalamus and midbrain. The SVS receives ambient light inputs from retinal ganglion cells and integrates this signal with internal homeostatic demands to influence physiology. During this processing, a multitude of oscillatory frequency bands coalesces, with some originating from the […]
  • Response of Bone Metabolism Markers to Ice Swimming in Regular Practitioners
    Objective: Both exercise and cold exposure cause physiological stress and they often occur in combination. However, the effects of exercise during severe cold on variation in bone metabolism in humans have remained elusive. The aim of this study was to investigate the variations in circulating bone metabolism markers after ice swimming (IS).Methods: Eighty-seven women and […]
  • Effect of Wearing Surgical Face Masks During Exercise: Does Intensity Matter?
    Face masks are widely recommended as means of controlling the coronavirus disease outbreak. This study aimed to examine the physiological and perceptual responses of wearing surgical face masks while exercising at different intensities. Thirteen healthy young adults (mean age, 21.9 ± 1.4 years) conducted randomized crossover trials with or without a surgical face mask. In […]
RSS FISIOLOGÍA MÉDICA
  • Enzyme-instructed self-assembly enabled fluorescence light-up for alkaline phosphatase detection 26/11/2021
    Alkaline phosphatase (ALP) exists in both normal and pathological tissues. Spatiotemporal variations in ALP levels can reveal its potential physiological functions and changes that occur during pathological conditions. However, it is still challenging to exploit fluorescent probes that can measure ALP activity under good spatial and temporal resolutions. Herein, enzyme-instructed self-assembly (EISA) was used to […]
    Yiming Zhang
  • A supportive physiologic environment for the extreme premature infant: Improving life outside the womb 26/11/2021
    Extreme prematurity remains an unsolved problem and is the leading cause of pediatric mortality and morbidity in developed countries. The extreme premature infant is physiologically a fetus, and current supportive measures in our NICUs are for the most part non-physiologic. In order to improve morbidity and mortality in this population, we have developed the Extra-uterine […]
    Alan W Flake
  • Brain-derived estrogen and neural function 26/11/2021
    Although classically known as an endocrine signal produced by the ovary, 17β-estradiol (E(2)) is also a neurosteroid produced in neurons and astrocytes in the brain of many different species. In this review, we provide a comprehensive overview of the localization, regulation, sex differences, and physiological/pathological roles of brain-derived E(2) (BDE(2)). Much of what we know […]
    Darrell W Brann
  • Plasma homoarginine concentrations in ewe's pregnancy and association with the number of fetuses 26/11/2021
    A striking increase in homoarginine concentrations, about more than 100-fold that observed in humans, was recently reported during pregnancy in a nutritionally induced model of intra-uterine growth restriction in ewes. To determine whether this phenomenon is at least partially related to the nutritional regimen, estrus synchronization, or analytical method, thirty-four one-year-old primiparous, non-synchronized, and well-fed […]
    Salvatore Sotgia
  • Diagnosis and management of premature ovarian insufficiency 26/11/2021
    Premature ovarian insufficiency (POI) is a complex clinical syndrome with life-changing physiological and psychological consequence in young women of reproductive age. However, the understanding of the etiology, diagnosis and optimal intervention strategies for this condition remains poorly understood. In recent years advances in epidemiologic and genetic research has improved our knowledge and awareness of POI. […]
    Rumana Rahman
  • Decreased plasma ghrelin in male ALS patients is associated with poor prognosis 26/11/2021
    Physiological changes including altered nutritional status influence disease progression and survival in patients with amyotrophic lateral sclerosis (ALS). Ghrelin affects the nutritional status by regulating appetite and energy expenditure, and also has neuroprotective effects. To investigate the association between ghrelin and ALS prognosis, we analyzed plasma acylated-ghrelin levels in 33 patients with ALS. Compared among […]
    Utako Nagaoka
  • Novel avenues to approach non-CPAP therapy and implement comprehensive OSA care 26/11/2021
    Recent advances in obstructive sleep apnoea (OSA) pathophysiology and translational research have opened new lines of investigation for OSA treatment and management. Key goals of such investigations are to provide efficacious, alternative treatment and management pathways that are better tailored to individual risk profiles to move beyond the traditional, continuous positive airway pressure (CPAP)-focused, "one […]
    Jean-Louis Pépin
  • Anatomical and physiological considerations in scleral lens wear: Intraocular pressure 26/11/2021
    Intraocular pressure (IOP) is maintained through complex and interrelated systems which control aqueous production and drainage, and it has been suggested that scleral lens (SL) wear may disrupt these vital homeostatic processes. This review provides an overview of anatomical and physiological processes that control IOP, identifies potential effects of SLs on these regulatory mechanisms, and […]
    Muriel M Schornack
  • Hypovascular Cellular Tumor in Primary Central Nervous System Lymphoma is Associated with Treatment Resistance: Tumor Habitat Analysis Using Physiologic MRI 26/11/2021
    CONCLUSIONS: A hypovascular cellular tumor habitat is associated with treatment resistance in primary central nervous system lymphoma, and its assessment may refine prechemotherapy imaging-based response prediction for patients with primary central nervous system lymphoma.
    S Y Jeong
  • Urinary metabotype of severe asthma evidences decreased carnitine metabolism independent of oral corticosteroid treatment in the U-BIOPRED study 26/11/2021
    CONCLUSIONS: This is the first large-scale study to delineate disease- and OCS-associated metabolic differences in asthma. The widespread associations with different therapies upon the observed metabotypes demonstrate the necessity to evaluate potential modulating effects on a treatment- and metabolite-specific basis. Altered carnitine metabolism is a potentially actionable therapeutic target that is independent of OCS treatment, […]
    Stacey N Reinke