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Journal of Endotoxin Research
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Signaling pathways involved in lipopolysaccharide stimulation of prostaglandin production by rat hypothalamic astroglial cells

Giuseppa Pistritto

Institute of Pharmacology, Catholic University Medical School, Rome, Italy

Giovanni Ciabattoni

Institute of Pharmacology, Catholic University Medical School, Rome, Italy

Cesare Mancuso

Institute of Pharmacology, Catholic University Medical School, Rome, Italy

Giuseppe Tringali

Institute of Pharmacology, Catholic University Medical School, Rome, Italy

Paolo Preziosi

Institute of Pharmacology, Catholic University Medical School, Rome, Italy

Pierluigi Navarra

Institute of Pharmacology, Catholic University Medical School, Rome, Italy, pnavarra{at}rm.unicatt.it

The aim of this study was to investigate the mechanisms through which bacterial lipopolysaccharide (LPS) stimulates prostaglandin (PG) production in rat hypothalamic astroglial cells in vitro. The latter were treated with LPS alone or LPS plus antagonists of the interleukin-1 (IL-1) and nitric oxide (NO) pathways, and the subsequent changes in cyclooxygenase (COX) activity were monitored by measuring a COX end-product, prostaglandin E2 (PGE2), released into the incubation medium. LPS produced a concentration-dependent increase in PGE2 release from astroglia after 24 h incubation; experiments with selective antagonists showed that the increase in PGE 2 release induced by LPS may be, at least in part, mediated by IL-1 and NO.

Journal of Endotoxin Research, Vol. 6, No. 4, 307-311 (2000)
DOI: 10.1177/09680519000060040601
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