The effect of nicotine on the production of soluble fms-like tyrosine kinase-1 and soluble endoglin in human umbilical vein endothelial cells and trophoblasts.

Ja Young Kwon, Sang Wook Bai, Young Guen Kwon, Se Hoon Kim, Chul Hoon Kim, Moung Hwa Kang, John A. Linton, Yong Won Park

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Abstract

OBJECTIVES: To evaluate the effect of nicotine on the production of soluble fms-like tyrosine kinase-1 (sFlt-1) and soluble endoglin (sEng) in human umbilical vein endothelial cells (HUVECs) and trophoblast cells, and to assess the involvement of alpha 7 nicotinic acetylcholine receptor (alpha7 nAChR) in this process. METHODS: Commercially available full-term placental trophoblasts and HUVECs derived from the umbilical cord of a normal pregnancy were used. The expression of alpha7 nAChR was assessed by immunostaining, RT-PCR, and western blotting. The expression of sFlt-1 and sEng protein in the cell media after 6 and 24 hours of treatment with nicotine was evaluated using a commercially available ELISA. To determine the involvement of alpha7 nAChR in the nicotinic effect, cells were treated with the alpha7 nAChR antagonist alpha-bungarotoxin (alpha-BGT) prior to the nicotine exposure. Levels of significance were determined using the Student's t-test and one-way ANOVA, and a p-value < 0.05 was considered significant. MAIN OUTCOME MEASURES: The levels of sFlt-1 and sEng protein were evaluated before and after the nicotine treatment with or without alpha-BGT pre-treatment. RESULTS: In trophoblast cells, a significant reduction of sFlt-1 and sEng protein was observed after 24 hours of nicotine treatment as compared to the untreated group (p = 0.002, 0.000). In HUVECs, nicotine only had a suppressive effect on the expression of sEng at 6 hours (p = 0.03); there was no effect on sFlt-1 expression. However, pre-treatment with alpha-BGT did not reverse the nicotine-induced suppressive effect on the expression of sFlt-1 and sEng in trophoblasts and HUVECs. CONCLUSIONS: Nicotine reduced the production of sFlt-1 and sEng in trophoblasts and sEng in HUVECs. This effect was not mediated by alpha7 nAChR.

Original languageEnglish
Pages (from-to)565-571
Number of pages7
JournalActa obstetricia et gynecologica Scandinavica
Volume89
Issue number4
DOIs
Publication statusPublished - 2010

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All Science Journal Classification (ASJC) codes

  • Obstetrics and Gynaecology

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