Background: We previously showed that priming of the polymorphonuclear leukocyte (PMNL), inflammation and oxidative stress antecede the development of hypertension in the Sabra rat model of hypertension. The actual role of PMNLs and PMNL-mediated oxidative stress and inflammation in the development of hypertension in this model has remained, however, unresolved.
Objective: The aim of our study was to test the hypothesis that PMNLs and that the PMNL-associated NADPH oxidase contribute to the development of hypertension in the Sabra rat model.
Methods: To determine the contribution of the PMNL to the development of hypertension, we depleted Sabra hypertension-prone (SBH/y) animals from PMNLs with an anti-PMNL antibody, salt-loaded them and monitored their blood pressure over a period of 30 days. To determine the contribution of the NADPH oxidase on the development of hypertension, we inhibited the activity of this enzyme with phenylarsine oxide or apocynin in SBH/y rats while salt-loading the animals and followed the course of their blood pressure over 60 days.
Results: PMNL depletion attenuated significantly the development of hypertension in SBH/y rats. Inhibition of NADPH oxidase with phenylarsine oxide and apocynin markedly inhibited the development of hypertension in SBH/y rats, as well as decreased the rate of superoxide release, the level of PMNL CD11b and the PMNL count.
Conclusion: These data are consistent with a significant contribution of PMNLs to the development of hypertension, and suggest that the mechanism may be related, at least in part, to PMNL-mediated oxidative stress and inflammation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1097/HJH.0b013e3282dd79b6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Endogenous sex hormone levels are associated with the revised Framingham Stroke Risk Profile in postmenopausal women: a longitudinal study in a Swedish cohort.
BMC Endocr Disord
January 2025
Family medicine, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Box 454, Göteborg, 40530, Sweden.
Background: Endogenous sex hormones in postmenopausal women have been associated with risk of cardiovascular diseases. The aim of this study was to determine the association between endogenous sex hormones and the revised Framingham Stroke Risk Profile (rFSRP) in postmenopausal women.
Methods: This is an observational cross-sectional study on the Vara-Skövde cohort, a Swedish population-based study for longitudinal surveillance of the development and progress of type 2 diabetes and hypertension.
[Development and validation of a risk prediction model for early postoperative high intraocular pressure after implantation of posterior chamber intraocular lens].
Zhonghua Yi Xue Za Zhi
January 2025
Ophthalmology Center, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou310009, China.
To develop and validate a predictive model for assessing the risk of early postoperative high intraocular pressure (HIOP) following posterior chamber intraocular lens implantation. The clinical data of patients who underwent posterior chamber intraocular lens implantation at the Second Affiliated Hospital of Zhejiang University School of Medicine between May 2023 and April 2024 were retrospectively reviewed. Patients were divided into a modeling group and a validation group with a 7∶3 ratio using computerized random allocation.
View Article and Find Full Text PDFGiant, unruptured, partially thrombosed right MCA aneurysm treated with 2 bypasses and excision.
World Neurosurg
January 2025
Department of Neurological Surgery, University of Louisville, Louisville, KY, USA. Electronic address:
Aneurysms of the middle cerebral artery (MCA) account for up to 40% of all unruptured intracranial aneurysms [1-3] and 14% to 20% of ruptured ones. [4-5] Giant MCA aneurysms are rare, representing 10% of cases [6], but carry an aggressive natural history, with the UCAS Japan study reporting an annual rupture rate of ∼ 17%. [7].
View Article and Find Full Text PDFAnastomotic Leak after Esophagectomy - Analysis of the STS General Thoracic Surgery Database.
Ann Thorac Surg
January 2025
Division of Cardiothoracic Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI.
Background: Anastomotic leak after esophagectomy is a major cause of morbidity and mortality. We sought to identify the prevalence of anastomotic leak, stratified by operative approach and disease etiology, as well as risk factors for leak.
Methods: A retrospective cohort analysis using the STS General Thoracic Surgery Database was conducted on patients who underwent esophagectomy with gastric reconstruction between 2009-2021.
Maresin-1 promotes neuroprotection and modulates metabolic and inflammatory responses in disease-associated cell types in preclinical models of Multiple Sclerosis.
J Biol Chem
January 2025
Department of Neurology, Henry Ford Health, Detroit, MI 48202, USA. Electronic address:
Multiple sclerosis (MS) is a prevalent inflammatory neurodegenerative disease in young people, causing neurological abnormalities and impairment. To investigate a novel therapeutic agent for MS, we observed the impact of maresin 1 (MaR1) on disease progression in a well-known, relapsing-remitting experimental autoimmune encephalomyelitis (RR-EAE) mouse model. Treatment with MaR1 accelerated inflammation resolution, reduced neurological impairment, and delayed disease development by reducing immune cell infiltration (CD4+IL-17+ and CD4+IFNγ+) into the central nervous system (CNS).
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!