The ultrastructural features of the area postrema (AP) were investigated in the suckling lamb, weaned lamb and adult sheep. No morphological differences were observed between lambs and sheep. Unciliated ependymal cells, linked by zonulae adherentes-type junctions and gap junctions, cover the AP ventricular surface. Clusters of pyriform neurons, glial cells, and axons are present in the parenchyma. The blood vessels are surrounded by wide perivascular spaces, which present an inner and outer basal lamina. The capillaries are of the fenestrated type. Perivascular glial cells rest on the outer basal lamina of the perivascular space and form a continuous ensheathment with their cell bodies or with flattened interdigitating processes. Along adjacent perivascular glial processes gap junctions are present. From our ultrastructural observations it appears that the overall cellular morphology of AP of the sheep does not differ substantially from that of monogastric mammals.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Neural pathways of nausea and roles in energy balance.
Curr Opin Neurobiol
January 2025
Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, CA, USA. Electronic address:
Our internal sensory systems encode various gut-related sensations, such as hunger, feelings of fullness, and nausea. These internal feelings influence our eating behaviors and play a vital role in regulating energy balance. Among them, the neurological basis for nausea has been the least well characterized, which has hindered comprehension of the connection between these sensations.
View Article and Find Full Text PDFCapillary connections between sensory circumventricular organs and adjacent parenchyma enable local volume transmission.
J Neuroendocrinol
January 2025
Department of Psychology, Columbia University, New York, New York, USA.
Among contributors to diffusible signaling are portal systems which join two capillary beds through connecting veins. Portal systems allow diffusible signals to be transported in high concentrations directly from one capillary bed to the other without dilution in the systemic circulation. Two portal systems have been identified in the brain.
View Article and Find Full Text PDFA case of neuromyelitis optica spectrum disorder complicated with aquaporin-4-antibody-associated organizing pneumonia.
Mult Scler
January 2025
Department of Neurology, National Hospital Organization, Fukuoka Higashi Medical Center, Koga, Japan.
An 80-year-old man with aquaporin-4-antibody-positive neuromyelitis optica spectrum disorder presented with a 2-week history of cough and hiccups, followed by progressive bilateral lower limb weakness, a bandlike burning sensation in the upper body, and urinary retention. Magnetic resonance imaging showed area postrema and thoracic central medullary lesions. Thorax computed tomography showed bilateral upper lung lobe consolidations.
View Article and Find Full Text PDFMOGAD and NMOSD: insights on patients' radiological and laboratory findings from a single UAE center.
Front Neurol
December 2024
Department of Neurology and Neurosurgery, Mcgill University, Montreal, QC, Canada.
Introduction: Although neuromyelitis optica spectrum disorders (NMOSD) and myelin oligodendrocyte glycoprotein antibody disease (MOGAD) are rare diseases, they pose a significant burden on both society and the healthcare system. This study aims to discuss the demographics and patient characteristics of these diseases in a single center in the United Arab Emirates (UAE).
Methods: This is a retrospective, descriptive study that included patients with either NMOSD or MOGAD treated at Rashid Hospital, UAE during the period between January 2019 and January 2024.
Simultaneous treatment with palm-LEAP2(1-14) and feeding high-fat diet attenuates liver lipid metabolism but not obesity: Sign of selective resistance to palm-LEAP2(1-14).
Mol Cell Endocrinol
December 2024
Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic. Electronic address:
Liver-enriched antimicrobial peptide 2 (LEAP2) is a natural antagonist/inverse agonist of ghrelin receptor GHSR. Its truncated palmitoylated analog palm-LEAP2(1-14) promised anti-obesity properties because it exhibited favourable stability and an acute anorexigenic effect in our previous studies. Here we demonstrate desirable palm-LEAP2(1-14) pharmacokinetics, with significant levels of the peptide persisting in mouse blood 3 h after its subcutaneous administration.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!