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J Perinat Med. 2019 Jul 26;47(5):539-546. doi: 10.1515/jpm-2018-0290.

Expression of genes involved in inflammation and growth - does sampling site in human full-term placenta matter?

Author information

1
Department of Obstetrics and Gynecology, School of Medical Sciences, Örebro University, Örebro, Sweden.
2
Department of Pediatrics, School of Medical Sciences, Örebro University, Örebro, Sweden.
3
Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden.
4
Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
5
University Health Care Research Center, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.

Abstract

Objective To investigate the placental gene expression of substances in the inflammatory cascade and growth factors at nine different well-defined sampling sites in full-term placentas from 12 normal weight healthy non-smoking women with an uncomplicated singleton pregnancy. Methods All placentas (six girls and six boys) were delivered vaginally. Quantitative real-time polymerase chain reaction was used to analyze toll receptor-2 and -4, interleukin-6 and -8, tumor necrosis factor-α, leptin, ghrelin, insulin-like growth factor-1 and -2, hepatocyte growth factor, hepatocyte growth factor receptor and insulin receptor (IR). Results The leptin gene and the IR gene showed higher expression in lateral regions near the chorionic plate compared to central regions near the basal plate (P = 0.028 and P = 0.041, respectively). Conclusion Our results suggest that the sampling site may influence the gene expression for leptin and IR in placental tissue obtained from full-term normal pregnancies. We speculate that this may be due to differences in placental structure and perfusion and may be important when future studies are designed.

KEYWORDS:

cytokines; gene expression; growth factors; placenta; sampling

PMID:
30920955
DOI:
10.1515/jpm-2018-0290

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