Background: The endothelial glycocalyx (EG) is the carbohydrate-rich luminal lining of endothelial cells that mediates permeability and blood cell-vessel wall interactions. To establish an atheroprotective role of the EG, adequate imaging and quantification of its properties in intact, viable, atherogenesis-prone arteries is needed.
Methods: Carotid arteries of C57Bl6/J mice (n=22) were isolated including the bifurcation, mounted in a perfusion chamber, and perfused with fluorescent lectin wheat germ agglutinin-fluorescein isothiocyanate. The EG was visualized through the vessel wall using two-photon laser scanning microscopy. An image quantification protocol was developed to assess EG thickness, which was sensitive to hyaluronidase-induced changes.
Results: In the lesion-protected common carotid artery, EG thickness was found to be 2.3 ± 0.1 μm (mean ± SEM), while the surface area devoid of (wheat germ agglutinin-sensitive) EG was 8.9 ± 4.2%. Data from the external carotid artery were similar (2.5 ± 0.1 μm; 9.1 ± 5.0%). In the atherogenesis-prone internal carotid artery the EG-devoid surface area was significantly higher (27.4 ± 5.5%, p<0.05); thickness at the remaining areas was 2.5 ± 0.1 μm.
Conclusion: The EG can be adequately imaged and quantified using two-photon laser scanning microscopy in intact, viable mounted carotid arteries. Spatial EG differences could underlie atherogenesis.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1159/000322176 | DOI Listing |
World Neurosurg
December 2024
Department of Neurology, Nanjing Pukou People's Hospital, No. 166 Shanghe Street, Jiangpu Subdistrict, Pukou District, Nanjing, 210000, China. Electronic address:
Objective: Early identification of risk factors associated with early neurological deterioration (END) in patients with acute minor stroke and large vessel occlusion (LVO) receiving intravenous thrombolysis (IVT) could assist in formulating treatment decisions.
Methods: Consecutive patients with acute minor stroke and LVO were extracted from a single-center prospective database spanning January 2020 to December 2023. END was defined as an increase of ≥ 4 points in the National Institutes of Health Stroke Scale (NIHSS) score from baseline, or ≥ 2 points in any single NIHSS item, within 24 hours of the IVT.
Intensive Care Med Exp
December 2024
Faculty of Nursing and Health Sciences, Nord University, Bodø, Norway.
Background: Identifying spontaneous circulation during cardiopulmonary resuscitation (CPR) is challenging. Current methods, which involve intermittent and time-consuming pulse checks, necessitate pauses in chest compressions. This issue is problematic in both in-hospital cardiac arrest and out-of-hospital cardiac arrest situations, where resources for identifying circulation during CPR may be limited.
View Article and Find Full Text PDFEBioMedicine
December 2024
Physics for Medicine Paris, INSERM U1273, ESPCI Paris, CNRS UMR 8063, PSL Research University, Paris, France.
Background: Neovascularisation of carotid plaques contributes to their vulnerability. Current imaging methods such as contrast-enhanced ultrasound (CEUS) usually lack the required spatial resolution and quantification capability for precise neovessels identification. We aimed at quantifying plaque vascularisation with ultrasound localization microscopy (ULM) and compared the results to histological analysis.
View Article and Find Full Text PDFNeurosurg Rev
December 2024
Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, US.
Objective: In recent years, the application of robotic assistance in diagnostic and therapeutic endovascular neurointerventional procedures has gained notable attention. In this systematic review and meta-analysis, we aim to evaluate the feasibility, safety, and current indications of robotic-assisted neurointerventions and to assess the degree of robotic assistance and reasons for unplanned manual conversion from robotic assistance.
Methods: We searched Medline, Scopus, Web of Science, and Cochrane Library databases following PRISMA guidelines and included studies with ≥ 4 patients reporting on robotic-assisted neurointerventions.
Surg Radiol Anat
December 2024
Department of Neurosurgery, Saitama Sekishinkai Hospital, 2-37-20 Irumagawa, Sayama, Saitama, 350-1305, Japan.
Purpose: To describe a case in which a right replaced posterior cerebral artery (PCA) was associated with an ipsilateral superior cerebellar artery (SCA) type persistent trigeminal artery (PTA) variant.
Methods: A 53-year-old man who had been diagnosed with chronic dissection of the left vertebral artery (VA) 4 months previously underwent follow-up magnetic resonance (MR) angiography using a 3-Tesla scanner.
Results: MR angiography showed a slightly dilated left VA at the terminal segment without interval change.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!