AI Article Synopsis
- The vasa nervorum is a network of small blood vessels that supplies blood to nerves and ganglia, specifically focusing on autonomic nerves in the rat's major pelvic ganglia (MPG).
- The study aims to characterize the blood vessels around the rat MPG and determine if they are innervated by nitrergic nerves containing neuronal nitric oxide synthase (nNOS).
- Results indicate that while capillaries within the MPG capsule lack smooth muscle, larger blood vessels outside the capsule are innervated by nNOS-positive fibers, suggesting a possible regulatory role of nitric oxide in blood flow to the MPG.
Article Abstract
Introduction: The vasa nervorum comprises a network of small diameter blood vessels that provide blood supply to nerves and ganglia. The cell bodies of autonomic nerves innervating the urogenital organs are housed in the major pelvic ganglia (MPG) in rats. The vasa nervorum of rat MPG have not been characterized previously, and it is not known whether these blood vessels are innervated by neuronal nitric oxide synthase (nNOS) containing nitrergic nerves.
Aim: To characterize the blood vessels in and around the rat MPG and to assess their nitrergic innervation.
Main Outcome Measures: Characterization of small blood vessels in and around the rat MPG and expression of nNOS in nerve fibers around those blood vessels.
Methods: MPG were obtained from healthy Sprague Dawley rats, fixed in paraformaldehyde, frozen and sectioned using a cryostat. The blood vessels and their nitrergic innervation were assessed with immunohistochemistry using antibodies against alpha-smooth muscle actin (smooth muscle marker), CD31 (endothelial marker), collagen IV (basal membrane marker) and nNOS. The immunofluorescence was imaged using a laser scanning confocal microscope.
Results: The neuronal cell bodies were contained within a capsule in the MPG. Blood vessels were observed within the capsule of the MPG as well as outside the capsule. The blood vessels inside the capsule were CD31-positive capillaries with no smooth muscle staining. Outside the capsule capillaries, arterioles and venules were observed. The extra-capsular arterioles and venules, but not the capillaries were innervated by nNOS-positive nerve fibers.
Conclusions: This study, to our knowledge, is the first to demonstrate the blood vessel distribution pattern and their nitrergic innervation in the rat MPG. While similar studies in human pelvic plexus are warranted, these results suggest that the blood flow in the MPG may be regulated by nitrergic nerve fibers and reveal a reciprocal relationship between nerves and blood vessels.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/jsm.12313 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Preliminary characterisation of the spatial immune and vascular environment in triple negative basal breast carcinomas using multiplex fluorescent immunohistochemistry.
PLoS One
January 2025
Department of Pathology, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.
Triple negative breast cancers often contain higher numbers of tumour-infiltrating lymphocytes compared with other breast cancer subtypes, with their number correlating with prolonged survival. Since little is known about tumour-infiltrating lymphocyte trafficking in triple negative breast cancers, we investigated the relationship between tumour-infiltrating lymphocytes and the vascular compartment to better understand the immune tumour microenvironment in this aggressive cancer type. We aimed to identify mechanisms and signaling pathways responsible for immune cell trafficking in triple negative breast cancers, specifically of basal type, that could potentially be manipulated to change such tumours from immune "cold" to "hot" thereby increasing the likelihood of successful immunotherapy in this challenging patient population.
View Article and Find Full Text PDFPerivascular cells function as key mediators of mechanical and structural changes in vascular capillaries.
Sci Adv
January 2025
Knight Cancer Precision Biofabrication Hub, Knight Cancer Institute, OHSU, Portland, OR 97201, USA.
A hallmark of chronic and inflammatory diseases is the formation of a fibrotic and stiff extracellular matrix (ECM), typically associated with abnormal, leaky microvascular capillaries. Mechanisms explaining how the microvasculature responds to ECM alterations remain unknown. Here, we used a microphysiological model of capillaries on a chip mimicking the characteristics of healthy or fibrotic collagen to test the hypothesis that perivascular cells mediate the response of vascular capillaries to mechanical and structural changes in the human ECM.
View Article and Find Full Text PDFEffect of Sertraline and Vortioxetine on Stress-Induced Brain Injury in Rats: Biochemical and Histopathological Evaluations.
Clin Neuropharmacol
January 2025
Medical Biochemistry, Erzincan Binali Yıldırım University Faculty of Medicine, Erzincan, Turkey.
Objectives: Our aim was to evaluate the comparative effects of sertraline and vortioxetine against stress-induced brain injury in rats.
Methods: The rats were assigned to a nonstress group (NSG), stress-treated control (StC), sertraline + stress (SSt), and vortioxetine + stress (VSt) groups. Sertraline and vortioxetine (10 mg/kg) were given orally by gavage to the SSt and VSt groups.
Nighttime systolic blood pressure a major factor of retinal vascular caliber changes in patients with newly diagnosed type 2 diabetes mellitus.
Am J Hypertens
January 2025
3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Greece.
Background: Changes in retinal vessel caliber are crucial for detecting early retinopathy, a significant cause of blindness in individuals with Diabetes Mellitus type 2 (T2DM). This study aims to evaluate the changes in retinal vessel caliber and identify factors associated with these changes in recently diagnosed T2DM patients.
Methods: The study included newly diagnosed T2DM patients (within 6 months of diagnosis) who were free of antidiabetic treatment (except metformin) and matched individuals based on age and blood pressure (BP).
Microsurgical clipping remains a viable option for the treatment of coilable ruptured middle cerebral artery aneurysms in the endovascular era.
Neurosurg Rev
January 2025
Department of Neurosurgery, Korea University Ansan Hospital, Korea University College of Medicine, 123 Jeokgeum-ro, Danwon-gu, 15355, Ansan, Gyeonggi-do, South Korea.
Although many institutions increasingly perform endovascular coiling instead of microsurgical clipping as the primary treatment for ruptured aneurysms, there remains ongoing debate regarding the optimal treatment strategy for ruptured middle cerebral artery (MCA) aneurysms. Therefore, we compared the outcomes of clipping and coiling for treating ruptured MCA aneurysms. A total of 155 ruptured MCA aneurysms that were deemed eligible for both clipping and coiling were retrospectively reviewed.
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!