Background And Objectives: Ureteral motility is essential for elimination of intraluminal stones, and it may be adversely affected by cardiovascular drugs that a patient is taking chronically. The aim of our study was to test whether ACE inhibitors and an angiotensin receptor blocker may influence spontaneous contractions of isolated human ureter.
Methods: Both phasic and tonic contractions of the isolated ureteral segments taken from 10 patients were measured as changes of the longitudinal tension or pressure recordings. Captopril, enalapril and losartan were separately added to the organ baths cumulatively.
Results: While enalapril (2.7 × 10-3.9 × 10 M) and captopril (6.1 × 10-2.7 × 10 M) did not affect either spontaneous activity or tone of isolated ureteral segments, losartan (2.9 × 10-4.2 × 10 M) caused concentration-dependent inhibition of spontaneous contractions of the segments (50 % effective concentration (EC) = 13.46 ± 1.80 × 10 M; F = 10.72, r = 0.79, p < 0.001).
Conclusions: Due to differences in molecular mechanism of action, angiotensin receptor blocker losartan does and ACE inhibitors captopril and enalapril do not inhibit spontaneous contractions of isolated human ureter.
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http://dx.doi.org/10.1007/s13318-015-0298-x | DOI Listing |
J Biomol Struct Dyn
January 2025
University of Health Sciences, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam.
The COVID-19 pandemic posed a threat to global society. Delta and Omicron are concerning variants due to the risk of increasing human-to-human transmissibility and immune evasion. This study aims to evaluate the binding ability of these variants toward the angiotensin-converting enzyme 2 receptor and antibodies using a computational approach.
View Article and Find Full Text PDFNeuropsychopharmacol Rep
March 2025
Molecular Psychoneuroimmunology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan.
COVID-19 exhibits not only respiratory symptoms but also neurological/psychiatric symptoms rarely including delirium/psychosis. Pathological studies on COVID-19 provide evidence that the cytokine storm, in particular (epidermal growth factor) EGF receptor (EGFR, ErbB1, Her1) activation, plays a central role in the progression of viral replication and lung fibrosis. Of note, SARS-CoV-2 virus (specifically, S1 spike domain) mimics EGF and directly transactivates EGFR, preceding the inflammatory process.
View Article and Find Full Text PDFDis Mon
January 2025
Division of Nephrology, Texas A&M University College of Medicine in Dallas, Dallas, TX 75246, USA.
Diabetic kidney disease is a leading cause of kidney failure worldwide and is easily detectable with screening examination. Diabetes causes hyperfiltration and activation of the renin-angiotensin aldosterone system by hemodynamic changes within the nephron, which perpetuates damaging physiology. Diagnosis is often clinical after detection of heavy proteinuria in a patient with diabetes,but can be confirmed by observation of histologic stages on kidney biopsy.
View Article and Find Full Text PDFPLoS One
January 2025
Immunology and Immunotherapy Division, Center of Molecular Immunology (CIM), Havana, Cuba.
SARS-CoV-2 has continued spreading around the world in recent years since the initial outbreak in 2019, frequently developing into new variants with greater human infectious capacity. SARS-CoV-2 and its mutants use the angiotensin-converting enzyme 2 (ACE2) as a cellular entry receptor, which has triggered several therapeutic strategies against COVID-19 relying on the use of ACE2 recombinant proteins as decoy receptors. In this work, we propose an ACE2 silent Fc fusion protein (ACE2-hFcLALA) as a candidate therapy against COVID-19.
View Article and Find Full Text PDFBMC Pregnancy Childbirth
January 2025
Collection Biologique de L'Hôpital de La Mère Et de L'Enfant CB-HME (Mother and Child Biobank), University Hospital Center, 8 Avenue Dominique Larrey, Limoges, France.
Background: Maternal agonistic autoantibodies against the angiotensin II type 1 receptor (AT1-AAs) have been implicated in the pathophysiology of preeclampsia, but their presence in their offsprings and their possible neonatal effects have not been specifically explored. This prospective study aimed to evaluate the presence of AT1-AAs and their potential clinical effects in neonates of AT1-AAs positive mothers.
Methods: Women with preeclampsia and their neonates were included.
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