Search results for "excretion"

Modulation of biotransformation and elimination systems by BM-21, an aqueous ethanolic extract from Thalassia testudinum, and thalassiolin B on human…

2012

Abstract BM-21 is an extract obtained from Thalassia testudinum marine plant with pharmacological properties. The effects of BM-21 and thalassiolin B (TB), its main component, on enzyme and transport proteins involved in drug metabolism and excretion in human cultured hepatocytes were evaluated. Cells were exposed for 48 h to sub-cytotoxic concentrations of BM-21 or TB. Effects on P450 isoforms revealed significant reductions of CYP1A2, 3A4 and 2D6 activities (up to 56%, 66% and 44% inhibition, respectively) after exposition to BM-21, no changes on CYP2A6 and 2C9 activities. TB produced a concentration-dependent reduction of all P450 activities. In addition, a decrease in total UGT and UGT2…

Assessment of Human Exposure to Deoxynivalenol, Ochratoxin A, Zearalenone and Their Metabolites Biomarker in Urine Samples Using LC-ESI-qTOF.

2021

Human are exposed to a wide range of mycotoxins through dietary food intake, including processed food. Even most of the mycotoxin exposure assessment studies are based on analysis of foodstuffs, and evaluation of dietary intake through food consumption patterns and human biomonitoring methods are rising as a reliable alternative to approach the individual exposures, overcoming the limitations of the indirect dietary assessment. In this study, human urine samples were analyzed, seeking the presence of deoxynivalenol (DON), ochratoxin A (OTA), zearalenone (ZEA), and their metabolites. For this purpose, 40 urine samples from female and male adult residents in the city of Valencia (Spain) were …

Real-Time Polymerase Chain Reaction for Detection of Schistosoma DNA in Small-Volume Urine Samples Reflects Focal Distribution of Urogenital Schistos…

2014

Schistosoma haematobium eggs and Schistosoma DNA levels were measured in urine samples from 708 girls recruited from 18 randomly sampled primary schools in South Africa. Microscopic analysis of two 10-mL urine subsamples collected on three consecutive days confirmed high day-to-day variation; 103 (14.5%) girls had positive results at all six examinations, and at least one positive sample was seen in 225 (31.8%) girls. Schistosoma-specific DNA, which was measured in a 200-μL urine subsample by using real-time polymerase chain reaction, was detected in 180 (25.4%) cases, and levels of DNA corresponded significantly with average urine egg excretion. In concordance with microscopic results, pol…

Studies on the kinetics and renal excretion of low and high molecular weight dextrans in preterm babies, newborns and young infants.

1977

Administration of low and high molecular weight dextrans in the initial phase of shock is no longer controversial. The special conditions in newborns, however, have been insufficiently considered in planning therapy. This investigation aimed at determining the biological half-lives of dextran 40 (Rheomacrodex®) and dextran 60 (Macrodex®) in this age group. The half-life of dextran 40 was found to be 60 min and that of dextran 60 3 h. Preterm babies and newborns excrete up to 25% less dextran 40 and 60 in 24 h than infants and adults. Normal adult values for excretion are only reached towards the end of the first year of life.

Der Einflu� einer ven�sen Stauung im Kopfbereich auf die Wasser- und Elektrolytausscheidung von Ratten

1960

1. Salt and water retention can be produced in rats by compression in the neck region or by ligature of the jugular veins.

Der Tag-Nacht-Rhythmus der Diurese, Elektrolytausscheidung und Clearance des echten endogenen Kreatinins bei der Ratte

1956

Elimination kinetics of the novel prodrug cinazepam possessing psychotropic activity in mice.

2011

Abstract The kinetics of excretion of the novel tranquilizer cinazepam (3-hydroxy-7-bromo-5-( ortho -chlorophenyl)-1,2-dihydro-3H-1,4-benzdiazepin-2-one hemisuccinate (I)) in mice after a single administration and different schemes of multiple administration were determined. Mass balance was studied daily in excretions of mice (feces and urine) for 5-10 days. We observed that monoexponen-tial renal excretion of 14 C-cinazepam and its metabolites predominated with all dosage regimens. Cinazepam and its metabolites were almost fully (> 90%) eliminated in urine and feces over the period of study (5-10 days), which means that no significant accumulation of the drug in the body occurred. The kin…

Ausscheidung und Verteilung von Wasser und Mineralien nach oralen Gaben von physiologischer NaCl-L�sung bei der Ratte

1958

Der Einflu� von Oxytocin auf die renale Wasser- und Salzausscheidung der Ratte

1956

Es wird zunaichst uber die Steigerung des Glutaminsaure/Glutamingehaltes einzelner Organe nach Futterung hoher Dosen Glutaminsaure berichtet, weiterhin die Frage zu klaren versucht, ob die nach Futterung hoher Glutaminsauredosen auftretende Bradykardie zentralen Ursprungs ist. Schlieβlich wird a u f die Beeinfluβung des Glutaminsaiurestoffwechsels durch Folsaure eingegangen, d i e als Storung der Acetyleholinbildung gedeutet wird.

Renale Wasser- und Elektrolytausscheidung durstender Ratten innerhalb von 32 Stunden nach einmaliger intraven�ser Gabe von Chlormerodrin oder Mersalyl

1959

At the beginning of a period of hunger and thirst, rats received 3 or 4,5 to 5 mg.Hg/kg. as chlormerodrine or mersalyl. The optimal dose of 3mg Hg/kg.as chlormerodrine or 4,5mg. Hg/kg. as mersalyl was effective for more than 32 hours after a single injection.