ISTA13-catecholamine toxicity and metabolism in the ciliated protozoan, Tetrahymena pyriformis.

Abstract:

:A high throughput culture methodology of unicellular eukaryote Tetrahymena pyriformis, strain GL were used for the determination of catecholamines toxicity and their metabolism. Catecholamines exhibited acute toxicity to Tetrahymena cells where dopamine and L-DOPA showed higher toxic potential of EC(10) (0.39 and 0.63 mg/L, respectively) and EC(20) (1.1 and 1.0 mg/L, respectively). All the testing catecholamines were highly degradable in the PPY-medium due to the oxidizing environment during incubation. They were also naturally synthesized and released by Tetrahymena cells into the culture medium and increasingly accumulated with time where as noradrenalin demonstrated significant results. Cells were exposed with physiological concentration (0.12 mg/L) and one higher concentration (8.0 mg/L) of catecholamines, resulting noradrenalin depletion and in vivo generation of a metabolite in response to dopamine with higher concentration treatment. This dopamine metabolite was relatively nonpolar compared with the catecholamines and was eluted later from the reverse phase C-18 column.

journal_name

Environ Toxicol

journal_title

Environmental toxicology

authors

Ud-Daula A,Pfister G,Schramm KW

doi

10.1002/tox.20457

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

549-54

issue

6

eissn

1520-4081

issn

1522-7278

journal_volume

24

pub_type

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