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Syncopal reactions in blood donors: Pathophysiology, clinical course, and features.
Asian J Transfus Sci
September 2022
Department of Physiology, Mahatma Gandhi Medical College, Sri Balaji Vidyapeeth (Deemed to be University), Puducherry, India.
Vasovagal syncope (VVS) in donors is a transient loss of consciousness due to short-term global cerebral hypoperfusion, which has a rapid onset and has complete spontaneous recovery. VVS may be triggered by pain, fear, anxiety, or emotional upset and loss of blood perse. It is an exaggeration of an adaptive response meant to assist in reducing the amount of bleeding/loss of blood.
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Clin Psychopharmacol Neurosci
February 2025
Department of Pharmacology, Amity Institute of Pharmacy, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India.
Objective: Cerebral ischemia is a medical condition that occurs due to poor supply of blood in the brain. Reperfusion being savage further exaggerates the tissue injury causing cerebral ischemia/reperfusion injury (CI/R). CI/R is marked by an impairment in release of neurotransmitter, excitotoxicity, oxidative stress, inflammation, and neuronal apoptosis.
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Hypertens Res
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Department of Internal Medicine, FUJITSU Clinic, Kawasaki, Japan.
Pathophysiology and Management Strategies for Post-Stroke Spasticity: An Update Review.
Int J Mol Sci
January 2025
School of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China.
Post-stroke spasticity (PSS), characterized by a velocity-dependent increase in muscle tone and exaggerated reflexes, affects a significant portion of stroke patients and presents a substantial obstacle to post-stroke rehabilitation. Effective management and treatment for PSS remains a significant clinical challenge in the interdisciplinary aspect depending on the understanding of its etiologies and pathophysiology. We systematically review the relevant literature and provide the main pathogenic hypotheses: alterations in the balance of excitatory and inhibitory inputs to the descending pathway or the spinal circuit, which are secondary to cortical and subcortical ischemic or hemorrhagic injury, lead to disinhibition of the stretch reflex and increased muscle tone.
View Article and Find Full Text PDFCXCL12 ameliorates neutrophilia and disease severity in SARS-CoV-2 infection.
J Clin Invest
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Department of Microbiology and Immunology, University of Iowa, Iowa City, United States of America.
Neutrophils, particularly low-density neutrophils (LDNs), are believed to contribute to acute COVID-19 severity. Here, we showed that neutrophilia can be detected acutely and even months after SARS-CoV-2 infection in patients and mice, while neutrophil depletion reduced disease severity in mice. A key factor in neutrophilia and severe disease in infected mice was traced to the chemokine CXCL12 secreted by bone marrow cells and unexpectedly, endothelial cells.
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