Stimulation of calcium uptake and cyclic GMP synthesis in rat basophilic leukemia cells by Escherichia coli heat-stable enterotoxin

Floyd C. Knoop, D. D. Thomas

Research output: Contribution to journalArticle

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Abstract

The effect of Escherichia coli heat-stable (ST) enterotoxin on calcium and cyclic nucleotide metabolism in rat basophilic leukemia cell cultures was investigated. Addition of ST enterotoxin to rat basophilic leukemia cell cultures resulted in dose- and time-dependent stimulation of calcium uptake and elevation of the intracellular cyclic GMP (cGMP) concentration. The effect of ST enterotoxin on calcium uptake (P < 0.02) and cGMP synthesis (P < 0.02) was demonstrated after 5 and 30 min of incubation at 37°C, respectively. In further studies ST enterotoxin did not enhance calcium release or the intracellular concentraton of cyclic AMP. The stimulation of calcium uptake and cGMP synthesis by ST enterotoxin was inhibited by pharmacological and chemical agents which block cellular calcium entry and prostaglandin synthesis. These results demonstrate that ST enterotoxin induces calcium uptake and cGMP synthesis in rat basophilic leukemia cell cultures.

Original languageEnglish (US)
Pages (from-to)971-977
Number of pages7
JournalInfection and Immunity
Volume41
Issue number3
StatePublished - Jan 1 1983

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Enterotoxins
Cyclic GMP
Leukemia
Hot Temperature
Escherichia coli
Calcium
Cell Culture Techniques
Cyclic Nucleotides
Cyclic AMP
Prostaglandins
Pharmacology

All Science Journal Classification (ASJC) codes

  • Immunology

Cite this

Stimulation of calcium uptake and cyclic GMP synthesis in rat basophilic leukemia cells by Escherichia coli heat-stable enterotoxin. / Knoop, Floyd C.; Thomas, D. D.

In: Infection and Immunity, Vol. 41, No. 3, 01.01.1983, p. 971-977.

Research output: Contribution to journalArticle

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