Acrylonitrile depletes glutathione without changing calcium sequestration in hepatic microsomes and mitochondria

Toxicology ◽  
1988 ◽  
Vol 48 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Cedrik Haškovec ◽  
Ivan Gut ◽  
Dana Volkmerová ◽  
Karel Sigler
Keyword(s):  
Calcium Sequestration ◽  
Hepatic Microsomes

In vivo enrichment of hepatic microsomes with isotopic iron

1974 ◽  
Vol 60 (2) ◽  
pp. 462-468 ◽  
Author(s):  
Mark R. Montgomery ◽  
Richard R. Erickson ◽  
Jordan L. Holtzman
Keyword(s):  
Hepatic Microsomes

scholarly journals Effects of Benzo[a]pyrene, Cortisol, and 17ß-Estradiol on Liver Microsomal EROD Activity of Anguilla anguilla: An In Vitro Approach

2021 ◽  
Vol 11 (6) ◽  
pp. 2533
Author(s):  
C.S.S. Ferreira ◽  
Miguel Oliveira ◽  
Maria Ana Santos ◽  
Mário Pacheco
Keyword(s):  
Steroid Hormones ◽  
Scientific Information ◽  
Endocrine System ◽  
Anguilla Anguilla ◽  
Erod Activity ◽  
Biotransformation Process ◽  
Hepatic Microsomes ◽  
Polycyclic Aromatic ◽  
In Vitro Effects

Fish liver ethoxyresorufin-O-deethylase (EROD) activity is widely used as biomarker of exposure to chemicals such as polycyclic aromatic hydrocarbons (PAHs). It is known that endocrine system plays a major role in fish stress mechanism. Despite the considerable scientific information about steroid hormone’s response, namely cortisol and 17ß-estradiol (E2), to stress situations, little is known about the influence of these hormones on enzymes involved on the biotransformation process. Thus, this study aimed to assess the in vitro effects of environmentally relevant concentrations of benzo[a]pyrene (B[a]P) (0.1, 0.3, 0.9, and 2.7 µM) and of two steroid hormones (cortisol and 17ß-estradiol) in a physiologically relevant concentration (5.997 ng/mL), alone or in combination, on Anguilla anguilla liver microsomal EROD activity, previously induced by 4 mg/kg β-naphthoflavone intraperitoneal injection. Hepatic microsomes in vitro exposure to the tested B[a]P concentrations induced a dose response inhibition of EROD activity, whereas exposure to cortisol significantly induced the activity of this enzyme. The steroid hormones were able to decrease the inhibitory effects of B[a]P on microsomal EROD activity, thus revealing a protective effect of these hormones over enzyme activity inhibited by contaminants.

Characterization of Diuron N-Demethylation by Mammalian Hepatic Microsomes and cDNA-Expressed Human Cytochrome P450 Enzymes

2007 ◽  
Vol 35 (9) ◽  
pp. 1634-1641 ◽  
Author(s):  
Khaled Abass ◽  
Petri Reponen ◽  
Miia Turpeinen ◽  
Jorma Jalonen ◽  
Olavi Pelkonen
Keyword(s):  
Cytochrome P450 ◽  
Cytochrome P450 Enzymes ◽  
Hepatic Microsomes ◽  
Human Cytochrome
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