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Expression profiles of interferon‐stimulated gene 15 and prostaglandin synthases in the ovine lymph nodes during early pregnancy

Ling Yang,Qingkai Wang,Yong Liu,Leying Zhang,Wan Lv,Baolian Liu

Published 2018 in Molecular Reproduction and Development

ABSTRACT

Lymph nodes are distributed all over the body and are part of the lymphatic system. The interferon‐stimulated gene 15 kDa protein (ISG15) and prostaglandins (PGs) are involved in the establishment of pregnancy and are expressed in the uterus during early pregnancy in sheep. In this study, the ovine lymph nodes were obtained on Day 16 of the estrous cycle, and Days 13, 16, and 25 of pregnancy, and the expression of ISG15 and PG synthases, including cyclooxygenase 1 (COX‐1), COX‐2, prostaglandin E (PGE) synthase (PTGES), and a PGF synthase (aldo‐keto reductase family 1, member B1, AKR1B1) were detected by quantitative real‐time polymerase chain reaction, western blot analysis, and immunohistochemistry analysis. Our results showed that there were peaks in the expression of mRNAs and the proteins of ISG15, COX‐1, COX‐2, PTGES, and AKR1B1 in the lymph nodes during early pregnancy and that the COX‐2 and AKR1B1 proteins were limited to the subcapsular sinus and lymph sinuses. In conclusion, the ISG15, COX‐1, COX‐2, PTGES, and AKR1B1 were upregulated in the maternal lymph nodes, which may be beneficial for the development of conceptus, maternal systemic immunoregulation, and anti‐luteolysis during early pregnancy in sheep.

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