[Effects of hydrogen peroxide on intracellular free Ca2+ content in rat liver oval cells].
Zhongguo Yi Xue Ke Xue Yuan Xue Bao
; 24(3): 281-4, 2002 Jun.
Article
em Zh
| MEDLINE
| ID: mdl-12905635
ABSTRACT
OBJECTIVE:
To study the effects and mechanism of hydrogen peroxide (H2O2) of low concentration on dynamic changes of intracellular free calcium contents ([Ca2+]i) in cultural rat liver oval cells (WB-F344 cells).METHODS:
Using Fluo-3/Am as fluorescent indicator of [Ca2+]i and it was measured by laser scanning confocal microscope system.RESULTS:
The results showed that (1) A rapid transient spiking of [Ca2+]i occurred after the stimulation of H2O2 of low concentration (800 nmol/L). (2) The [Ca2+]i increase was abolished by pretreated with catalase (CAT) or by incubated in D-Hank's solution containing EGTA, the chelate of extracellular Ca2+. (3) The [Ca2+]i increase was not inhibited by pretreated nifedipine, Ca2+ channel blocker, but was abolished by pretreated with anthracere-9-cardoxylic acid (A9C), the Cl-channel blocker and which also blocked calcium activated non-selective cation channel (CAN).CONCLUSIONS:
These results suggest that the increase of [Ca2+]i induced by H2O2 of low concentration may be due to the influx of extracellular Ca2+ through CAN.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cálcio
/
Hepatócitos
/
Peróxido de Hidrogênio
Limite:
Animals
Idioma:
Zh
Revista:
Zhongguo Yi Xue Ke Xue Yuan Xue Bao
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
China