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Specialty: Physiology
Condition: Pain
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Total 20 results found since Jan 2013.
Effects of Neurotrophic Factors in Glial Cells in the Central Nervous System: Expression and Properties in Neurodegeneration and Injury
Conclusion and Future Aspects
This review summarizes available NTF expression data, compiles existing evidence on the effects of glial NTF signaling in healthy conditions and in disease models (Figure 1), and highlights the importance of this topic for future studies. The relationship between NTFs and glia is crucial for both the developing and adult brain. While some of these factors, such as NT-3 and CNTF, have highly potent effects on gliogenesis, others like BDNF and GDNF, are important for glia-mediated synapse formation.
Neurotrophic factors play significant roles during neurodegenerative disorders. In many cases, ...
Source: Frontiers in Physiology - April 25, 2019 Category: Physiology Source Type: research
Sickle Cell Disease Subjects Have a Distinct Abnormal Autonomic Phenotype Characterized by Peripheral Vasoconstriction With Blunted Cardiac Response to Head-Up Tilt
Conclusion
We have shown that SCD subjects are much more likely than non-SCD subjects to have impaired cardiac, but intact peripheral responses to orthostatic stress induced by HUT. These abnormal responses are associated with low baseline cardiac parasympathetic activity, independent of hemoglobin level. The classification of autonomic phenotypes based on HUT response may have potential use for predicting disease severity, guiding and targeting treatments/interventions to alleviate the risk of adverse outcomes in SCD.
Ethics Statement
All experiments were conducted at Children’s Hospital Los Angeles (CHLA). The ...
Source: Frontiers in Physiology - April 10, 2019 Category: Physiology Source Type: research
Glutamate Transport and Preterm Brain Injury
Silvia Pregnolato1*, Elavazhagan Chakkarapani1, Anthony R. Isles2 and Karen Luyt1
1Department of Neonatal Neurology, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
2Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, School of Medicine, Cardiff University, Cardiff, United Kingdom
Preterm birth complications are the leading cause of child death worldwide and a top global health priority. Among the survivors, the risk of life-long disabilities is high, including cerebral palsy and impairment of movement, cognition, and beh...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research
Microglial Activation Modulated by P2X4R in Ischemia and Repercussions in Alzheimer ’s Disease
There are over 80 million people currently living who have had a stroke. The ischemic injury in the brain starts a cascade of events that lead to neuronal death, inducing neurodegeneration which could lead to Alzheimer’s disease (AD). Cerebrovascular diseases have been suggested to contribute to AD neuropathological changes, including brain atrophy and accumulation of abnormal proteins such as amyloid beta (Aβ). In patients older than 60 years, the incidence of dementia a year after stroke was significantly increased. Nevertheless, the molecular links between stroke and dementia are not clearly understood but could be r...
Source: Frontiers in Physiology - February 23, 2022 Category: Physiology Source Type: research
Human Physiology in an Aquatic Environment.
Authors: Pendergast DR, Moon RE, Krasney JJ, Held HE, Zamparo P
Abstract
Water covers over 70% of the earth, has varying depths and temperatures and contains much of the earth's resources. Head-out water immersion (HOWI) or submersion at various depths (diving) in water of thermoneutral (TN) temperature elicits profound cardiorespiratory, endocrine, and renal responses. The translocation of blood into the thorax and elevation of plasma volume by autotransfusion of fluid from cells to the vascular compartment lead to increased cardiac stroke volume and output and there is a hyperperfusion of some tissues. Pulmonary ...
Source: Comprehensive Physiology - October 3, 2015 Category: Physiology Tags: Compr Physiol Source Type: research
Physiology in Medicine: Peripheral arterial disease
Peripheral arterial disease (PAD) is an atherosclerotic condition that can provoke symptoms of leg pain ("intermittent claudication") during exercise. Because PAD is often observed with comorbid conditions such hypertension, dyslipidemia, diabetes, cigarette smoking, and/or physical inactivity, the pathophysiology of PAD is certainly complex and involves multiple organ systems. Patients with PAD are at high risk for myocardial infarction, stroke, and all-cause mortality. For this reason, a better physiological understanding of the pathogenesis and treatment options for PAD patients is necessary and forms the basis of this ...
Source: Journal of Applied Physiology - November 1, 2013 Category: Physiology Authors: Muller, M. D., Reed, A. B., Leuenberger, U. A., Sinoway, L. I. Tags: PHYSIOLOGY IN MEDICINE Source Type: research
Targeting Aldehyde Dehydrogenase 2: New Therapeutic Opportunities
A family of detoxifying enzymes called aldehyde dehydrogenases (ALDHs) has been a subject of recent interest, as its role in detoxifying aldehydes that accumulate through metabolism and to which we are exposed from the environment has been elucidated. Although the human genome has 19 ALDH genes, one ALDH emerges as a particularly important enzyme in a variety of human pathologies. This ALDH, ALDH2, is located in the mitochondrial matrix with much known about its role in ethanol metabolism. Less known is a new body of research to be discussed in this review, suggesting that ALDH2 dysfunction may contribute to a variety of h...
Source: Physiological Reviews - January 1, 2014 Category: Physiology Authors: Chen, C.-H., Ferreira, J. C. B., Gross, E. R., Mochly-Rosen, D. Tags: Articles Source Type: research
Targeting aldehyde dehydrogenase 2: new therapeutic opportunities.
Abstract
A family of detoxifying enzymes called aldehyde dehydrogenases (ALDHs) has been a subject of recent interest, as its role in detoxifying aldehydes that accumulate through metabolism and to which we are exposed from the environment has been elucidated. Although the human genome has 19 ALDH genes, one ALDH emerges as a particularly important enzyme in a variety of human pathologies. This ALDH, ALDH2, is located in the mitochondrial matrix with much known about its role in ethanol metabolism. Less known is a new body of research to be discussed in this review, suggesting that ALDH2 dysfunction may contribute...
Source: Physiological Reviews - January 1, 2014 Category: Physiology Authors: Chen CH, Ferreira JC, Gross ER, Mochly-Rosen D Tags: Physiol Rev Source Type: research
The UVB cutaneous inflammatory pain model: a reproducibility study in healthy volunteers.
CONCLUSION: Based on sample size calculations, it is recommended to use the erythema index to assess neurogenic inflammation, and pin-prick stimulation for primary hyperalgesia for both parallel and crossover pharmacological screening studies.
PMID: 24379905 [PubMed]
Source: International Journal of Physiology, Pathophysiology and Pharmacology - November 16, 2014 Category: Physiology Tags: Int J Physiol Pathophysiol Pharmacol Source Type: research
Modulation of acid-sensing ion channels: molecular mechanisms and therapeutic potential.
Authors: Chu XP, Papasian CJ, Wang JQ, Xiong ZG
Abstract
Increases in extracellular proton concentrations, which takes place in physiological conditions such as synaptic signaling and pathological conditions such as tissue inflammation, ischemic stroke, traumatic brain injury, and epileptic seizure, activates a unique family of membrane ion channels; the acid-sensing ion channels (ASICs). All ASICs belong to amiloride-sensitive degenerin/epithelial Na(+) channel superfamily. Four genes encoded at seven sub-units have been identified. ASICs are expressed primarily in neurons and have been shown to play critical role...
Source: International Journal of Physiology, Pathophysiology and Pharmacology - November 16, 2014 Category: Physiology Tags: Int J Physiol Pathophysiol Pharmacol Source Type: research
Barrier function in the peripheral and central nervous system-a review.
Abstract
The peripheral (PNS) and central nervous system (CNS) are delicate structures, highly sensitive to homeostatic changes-and crucial for basic vital functions. Thus, a selection of barriers ensures the protection of the nervous system from noxious blood-borne or surrounding stimuli. In this chapter, anatomy and functioning of the blood-nerve (BNB), the blood-brain (BBB), and the blood-spinal cord barriers (BSCB) are presented and the key tight junction (TJ) proteins described: claudin-1, claudin-3, claudin-5, claudin-11, claudin-12, claudin-19, occludin, Zona occludens-1 (ZO-1), and tricellulin are by now i...
Source: Pflugers Archiv : European Journal of Physiology - December 11, 2016 Category: Physiology Authors: Reinhold AK, Rittner HL Tags: Pflugers Arch Source Type: research
Compensation of Respiratory-Related Postural Perturbation Is Achieved by Maintenance of Head-to-Pelvis Alignment in Healthy Humans
Conclusion
Extreme lung volume variations over vital capacity is associated with changes of thoracic curvature bringing it outside the normal range, which would theoretically compromise verticality. This is however fully compensated by adaptations of the cervical curvature and pelvic tilt to preserve adequate head-to-pelvis verticality and horizontal gaze alignment. Lung volume related postural perturbations increase with age, but age did not affect head-to-pelvis alignment. Future studies are needed to investigate potential postural dysfunction in chronic respiratory diseases that induce changes of lung volume or chest g...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research
Chronic Ablation of TRPV1 Sensitive Skeletal Muscle Afferents Attenuates the Muscle Metaboreflex
Am J Physiol Regul Integr Comp Physiol. 2021 Jul 14. doi: 10.1152/ajpregu.00129.2021. Online ahead of print.ABSTRACTExercise intolerance is a hallmark symptom of cardiovascular disease and likely occurs via enhanced activation of muscle metaboreflex- induced vasoconstriction of the heart and active skeletal muscle which, thereby limits cardiac output and peripheral blood flow. Muscle metaboreflex vasoconstrictor responses occur via activation of metabolite-sensitive afferent fibers located in ischemic active skeletal muscle, some of which express Transient Receptor Potential Vanilloid 1 (TRPV1) cation channels. Local cardi...
Source: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology - July 14, 2021 Category: Physiology Authors: Joseph Mannozzi Mohamed-Hussein Al-Hassan Beruk Lessanework Alberto Alvarez Danielle Senador Donal S O'Leary Source Type: research