Anti-Interleukin-8 monoclonal antibody, clone NAPII [FITC]

Introduction: In mink, as many as 65% of embryos die during gestation. The causes and the mechanisms of embryonic mortality remain unclear. The purpose of our study was to examine global gene expression changes during embryo invasion in mink, and thereby to identify potential signaling pathways involved in implantation failure and early pregnancy loss. Methods: Illumina's next-generation sequencing technology (RNA-Seq) was used to analyze the differentially expressed genes (DEGs) in implantation (IMs) and inter-implantation sites (inter-IMs) of uterine tissue. Results: We identified a total of 606 DEGs, including 420 up- and 186 down-regulated genes in IMs compared to inter-IMs. Gene annotation analysis indicated multiple biological pathways to be significantly enriched for DEGs, including immune response, ECM complex, cytokine activity, chemokine activity and protein binding. The KEGG pathway including cytokine-cytokine receptor interaction, Jak-STAT, TNF and the chemokine signaling pathway were the most enriched. A gene network was constructed, and hub nodes such as CSF3, ICAM1, FOS, IL1B, IL8, CD14 and MYC were found through network analysis. Discussion: This report provides a valuable resource for understanding the mechanisms of embryo implantation in mink.

C-X-C motif chemokine ligand 8 (CXCL8) gene, a crucial cytokine with roles in the immune system, functions in the inflammatory response by promoting the activation and migration of neutrophils. Previous studies have reported that the CXCL8 gene resides within the quantitative trait locus (QTL). In this report, the porcine CXCL8 gene was selected to investigate its effect on serum immune traits. CXCL8 mRNA expression was also detected by quantitative real-time polymerase chain reaction (PCR). A SNP (NC_010450.4:g.69934997T > C, rs81218904) of the CXCL8 gene was identified by direct nucleotide sequencing and the SNP was genotyped by MALDI-TOF MS in the three pig populations, which consisted of 300 piglets distributed in three pig breeds, Landrace (68 piglets), Large White (158 piglets) and Songliao Black (74 piglets). An in-depth analysis indicated that there was a significant correlation between the SNP and the serum CXCL8 level (20 days) (14 days after vaccination) (p < .05). Our results suggest that the CXCL8 gene may be served as a genetic marker with effects on serum CXCL8 level in the pig disease resistance breeding.