Increasing animal evidence support an important facilitatory interaction between angiotensin II and norepinephrine within the kidney. This angiotensin II/norepinephrine interaction was investigated in man by examining the effect of enalapril pretreatment (5 mg for 5 days) on the renal response to a low non-pressor dose of intravenous tyramine 4 micrograms/kg/min for 120 min in 8 healthy subjects undergoing water diuresis. Tyramine is an indirect sympathomimetic agent which causes neuronal release of norepinephrine. Enalapril and tyramine, alone and in combination, had no effect on glomerular filtration, effective renal plasma flow or sodium excretion. Tyramine caused a significant increase in urinary flow rate (p < 0.05) but this was not influenced by enalapril pretreatment. The lack of effect of enalapril on the renal response to tyramine contrasts with a previous study which examined the effect of enalapril on the renal response to circulating norepinephrine. This may suggest that enalapril affect renal function only when there is renal vasoconstriction (as with norepinephrine) and not when renal blood flow is unchanged (as with tyramine).
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Fluid overload trajectories and mortality in hemodialysis patients.
J Intern Med
December 2024
Fresenius Medical Care, Global Medical Office, Bad Homburg, Germany.
Background: Fluid overload remains critical in managing patients with end-stage kidney disease. However, there is limited empirical understanding of fluid overload's impact on mortality. This study analyzes fluid overload trajectories and their association with mortality in hemodialysis patients.
View Article and Find Full Text PDFRole of Renal Replacement Therapy in Managing Toluene-Induced Acidosis.
Am J Case Rep
December 2024
Division of Emergency Medicine, Toho University Sakura Medical Center, Sakura, Chiba, Japan.
BACKGROUND Toluene poisoning can occur as a result of occupational exposure in industries such as painting, as well as through misuse, leading to complications such as neurological symptoms due to the accumulation of the metabolic byproduct of hippuric acid and metabolic acidosis. However, the exact mechanisms remain unclear. Hippuric acid is not removed by dialysis, so urinary excretion plays a central role.
View Article and Find Full Text PDFRisk factors of systemic inflammatory response syndrome after minimally invasive percutaneous nephrolithotomy with a controlled irrigation pressure.
BMC Urol
December 2024
Department of Urology, Dongguan Tungwah Hospital, Dongguan, Guang dong, 523110, China.
Objective: This study aims to identify the risk factors for systemic inflammatory response syndrome (SIRS) after minimally invasive percutaneous nephrolithotomy (PCNL) with a controlled irrigation pressure and to find which patients undergoing PCNL are likely to develop SIRS under the pressure-controlled condition.
Methods: A total of 303 consecutive patients who underwent first-stage PCNL in our institute between July 2016 and June 2018 were retrospectively reviewed. All the procedures were performed with an 18 F tract using an irrigation pump setting the irrigation fluid pressure at 110 mmHg and the flow rate of irrigation at 0.
Outcomes in patients with thrombotic microangiopathy associated with a trigger following plasma exchange: A systematic literature review.
Transfus Apher Sci
December 2024
Alexion, AstraZeneca Rare Disease, 121 Seaport Blvd, Boston, MA 02210, USA. Electronic address:
Plasma exchange (PE) outcomes in patients with trigger-associated thrombotic microangiopathy (TMA) have not been comprehensively reviewed. Embase and MEDLINE® were searched on 03/14/2022 for English language articles published after 2007, alongside a congress materials search (2019-2022; PROSPERO: CRD42022325170). Studies with patients with trigger-associated TMA (excluding thrombotic thrombocytopenic purpura, 'typical' hemolytic uremic syndrome caused by Shiga toxin-producing Escherichia coli, post-partum TMA, and TMAs with known genetic cause) who received PE or plasma infusion (PI) and reported treatment response (including measures), safety, patient-/caregiver-reported outcomes, or economic burden data were examined.
View Article and Find Full Text PDFReduction in Renal Heme Oxygenase-1 Is Associated with an Aggravation of Kidney Injury in Shiga Toxin-Induced Murine Hemolytic-Uremic Syndrome.
Toxins (Basel)
December 2024
Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany.
Hemolytic-uremic syndrome (HUS) is a systemic complication of an infection with Shiga toxin (Stx)-producing enterohemorrhagic , primarily leading to acute kidney injury (AKI) and microangiopathic hemolytic anemia. Although free heme has been found to aggravate renal damage in hemolytic diseases, the relevance of the heme-degrading enzyme heme oxygenase-1 (HO-1, encoded by ) in HUS has not yet been investigated. We hypothesized that HO-1 also important in acute phase responses in damage and inflammation, contributes to renal pathogenesis in HUS.
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!