Examination of the effects of piriprost (U-60,257B) on alkaline phosphatase activity of rat endometrial stromal cells

Sonny Cejic, T. G. Kennedy
In: Prostaglandins · 1991 · vol. 42(2) , pp. 179–189 · doi:10.1016/0090-6980(91)90076-r · PMID:1775638 · W2019052459
article OA: closed CC0 ⤵ 1 in-corpus citation
View on OpenAlex View on PubMed View at publisher
⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-06-13 ⓘ

Piriprost, a prostaglandin E2 analogue, was tested for its effects on alkaline phosphatase activity in rat endometrial stromal cells.

One-sentence paraphrase of the abstract; not a substitute for reading it. No clinical advice. How this works

Abstract

Previously, piriprost (U-60,257B; an inhibitor of leukotriene (LT) synthesis) was shown to increase alkaline phosphatase (ALP) activity in cultured endometrial stromal cells (1). The present study investigated the mechanism of action of piriprost in this system. Sensitized rat endometrial stromal cells were isolated and cultured for up to 72 hr with various treatments. Piriprost (100 microM) was found to decrease 5-hydroxyeicosatetraenoic acid (a 5-lipoxygenase product) by 53% after 72 hr which provided evidence that 5-lipoxygenase was being inhibited by piriprost. Lactate dehydrogenase (LDH) activity confirmed that piriprost was not toxic to the cells. The possibility of piriprost acting in an analogous manner with that of PGs was examined. Three microM PGE2 or 20 microM carba-prostacyclin (CP), an analogue of PGI2, maximally increased (p less than 0.01) ALP activity at 72 hr and the further addition of 100 microM piriprost to PGE2 or CP caused an additional, additive increase in ALP activity. This indicated that the mechanism of action of piriprost was probably different from that of PGE2 or PGI2. The possibility that piriprost was shunting arachidonic acid into PG production was examined. Ten microM indomethacin (an inhibitor of PG synthesis) caused a decrease (p less than 0.01) in ALP activity and a 99% reduction in PGE2 at 72 hr. The effects of the combination of 100 microM piriprost and 10 microM IM were statistically additive, suggesting that the effects of piriprost were not due to an increase in PG production. These studies suggest that the effects piriprost on possible in vitro decidualization may be due to inhibition of 5-lipoxygenase.

My notes (saved in your browser only)

Citation neighborhood (sparse)

Too few in-corpus citations on either side for a chart; here are the lists.

Cites (3)

Cited by (1)

References (25)

Cited by (1)

Source provenance

openalex
last seen: 2026-06-10T17:14:06.276822+00:00
unpaywall
last seen: 2026-08-20T06:30:07.000247+00:00
License: CC0 · commercial use OK