Aim: To compare echomorphostructure of atherosclerotic plaques and vascular stenosis degree with structural changes of the brain according to MR image in patients with combined atherosclerotic affection of coronary and carotid arteries in an asymptomatic course of carotid atherosclerosis.
Material And Methods: MR imaging was made in 53 men aged 44 to 78 years with stenosing atherosclerotic affection of the internal carotid arteries. Vascular obstruction reached 30-80%. Neurological examination detected no signs of focal brain lesions. Hypertension, myocardial infarction, permanent atrial fibrillation were diagnosed in 19 (36%), 20 (38%) and 12 (23%) patients, respectively.
Results: Ultrasound investigation has established that carotid arteries contain more frequently spongy and heterogenic plaques than dense and calcinated. MRI registered structural alterations of cerebral tissue of various degree in 96% cases.
Conclusion: Significant correlations were established between ischemic affection of the brain with myocardial infarction, arterial hypertension, cardiac fibrillation, type of atherosclerotic plaque.
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Sci Rep
January 2025
Department of Neurology, Inner Mongolia Autonomous Region People's Hospital, Hohhot, China.
Acute internal carotid artery occlusion (AICAO) can result in malignant cerebral edema and unfavorable patient outcomes. This study evaluated the utility of transcranial Doppler (TCD) in assessing contralateral flow compensation and predicting outcomes in patients with AICAO. We enrolled 51 patients within 6 h of symptom onset and conducted TCD examinations to evaluate collateral circulation.
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January 2025
Department of Life Science, Ewha Womans University, Seoul 03760, Republic of Korea. Electronic address:
Epidithio-diketopiperazine (ETP) compound is the family of natural fungal metabolites that are known to exert diverse biological effects, such as immunosuppression and anti-cancer activity, in higher animals. However, an enzyme-like catalytic activity or function of the ETP derivatives has not been reported. Here, we report the generation of novel thiol peroxidase mimetics that possess peroxide-reducing activity through strategic derivatization of the core ETP ring structure.
View Article and Find Full Text PDFAJNR Am J Neuroradiol
January 2025
Department of Radiology (R.C., R.S., L.S.), University of Cagliari, Cagliari, Italy
Background And Purpose: Changes in perivascular fat density (PFD) and its association with inflammation have been topics of interest in both atherosclerotic and nonatherosclerotic vasculopathies. The objective of this study was to assess the PFD in patients with spontaneous internal carotid artery dissection (SICAD) or carotid atherosclerotic plaque, with and without intraplaque hemorrhage (IPH).
Materials And Methods: A cross-sectional retrospective bicentric analysis of 130 patients (30 with SICAD and 100 with carotid atherosclerotic plaque) who underwent CT angiography was performed.
J Physiol Sci
January 2025
Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-Ku, 116-8551, Tokyo, Japan. Electronic address:
Actin linked regulatory mechanisms are known to contribute contraction/relaxation in smooth muscle. In order to clarify whether modulation of polymerization/depolymerization of actin filaments affects relaxation process, we examined the effects of cytochalasin D on relaxation process by Ca removal after Ca-induced contraction of β-escin skinned (cell membrane permeabilized) taenia cecum and carotid artery preparations from guinea pigs. Cytochalasin D, an inhibitor of actin polymerization, significantly suppressed the force during relaxation both in skinned taenia cecum and carotid artery.
View Article and Find Full Text PDFExp Physiol
January 2025
Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Dallas, Dallas, Texas, USA.
A reduction in cerebral blood flow (CBF) has been observed during spaceflight and bed rest. We aimed to examine the magnitude and regional heterogeneity of the decrease in CBF during bed rest compared to posture changes on Earth. Seventeen participants (age, 29 ± 9 years, 7 females) were studied in the upright and supine posture and over 3 days of bed rest.
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