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Open AccessArticle

Transcriptomic Analysis of the Porcine Endometrium during Embryo Implantation

Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan 250100, China
Key Laboratory of Disease Control and Animal Breeding of Shandong Province, Jinan 250100, China
Author to whom correspondence should be addressed.
Academic Editor: Montserrat Corominas
Genes 2015, 6(4), 1330-1346;
Received: 6 October 2015 / Revised: 2 December 2015 / Accepted: 4 December 2015 / Published: 21 December 2015
(This article belongs to the Section Population and Evolutionary Genetics and Genomics)
PDF [1502 KB, uploaded 21 December 2015]


In pigs, successful embryo implantation is an important guarantee for producing litter size, and early embryonic loss occurring on day 12–30 of gestation critically affects the potential litter size. The implantation process is regulated by the expression of numerous genes, so comprehensive analysis of the endometrium is necessary. In this study, RNA sequencing (RNA-Seq) technology is used to analyze endometrial tissues during early pregnancy. We investigated the changes of gene expression between three stages (day 12, 18, and 25) by multiple comparisons. There were 1557, 8951, and 2345 differentially expressed genes (DEGs) revealed between the different periods of implantation. We selected several genes for validation by the use of quantitative real-time RT-PCR. Bioinformatic analysis of differentially expressed genes in the endometrium revealed a number of biological processes and pathways potentially involved in embryo implantation in the pig, most noticeably cell proliferation, regulation of immune response, interaction of cytokine-cytokine receptors, and cell adhesion. These results showed that specific gene expression patterns reflect the different functions of the endometrium in three stages (maternal recognition, conceptus attachment, and embryo implantation). This study identified comprehensive transcriptomic profile in the porcine endometrium and thus could be a foundation for targeted studies of genes and pathways potentially involved in abnormal endometrial receptivity and embryo loss in early pregnancy. View Full-Text
Keywords: embryo implantation; endometrium; pigs; pregnancy; sows; transcriptome embryo implantation; endometrium; pigs; pregnancy; sows; transcriptome

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Lin, H.; Wang, H.; Wang, Y.; Liu, C.; Wang, C.; Guo, J. Transcriptomic Analysis of the Porcine Endometrium during Embryo Implantation. Genes 2015, 6, 1330-1346.

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