Identification and genetic mapping of bovine chemokine genes expressed in epithelial cells

Identification and genetic mapping of bovine chemokine genes expressed in epithelial cells RNA fingerprinting by arbitrarily primed (RAP)-PCR was used to identify two bovine genes that were differentially expressed in epithelial cells during an inflammatory response. RNA fingerprints revealed two differentially amplified transcripts when monolayers of Madin-Darby bovine kidney (MDBK) cells were stimulated with Escherichia coli O157:H7 lipopolysaccharide (LPS) in combination with cycloheximide (CX). Sequence analysis showed that both transcripts encoded members of the alpha C-X-C chemokine family; one was interleukin 8 (IL-8), and the other was a protein closely related to bovine growth-regulated protein (GRO)-γ (89% identical). The latter putative epithelial cell inflammatory protein was designated ECIP-1. IL-8 and ECIP-1 genes were placed on the cattle genetic map with single-nucleotide polymorphism (SNP) markers amplified from genomic DNA. Multi-point linkage analysis indicated that the gene locations were indistinguishable from those of serum albumin (ALB) and vitamin D-binding protein (GC) on bovine Chromosome (BTA) 6. In humans, ALB and GC are located near IL-8, GRO-γ, and seven other alpha chemokines on Chr 4 (HSA 4q11-4q13), suggesting that this gene cluster has been conserved on BTA6. These results provide a starting point for characterizing allelic variation in chemokine genes and their role in the pathogenesis of bacterial infections in cattle. Mammalian Genome Springer Journals

Identification and genetic mapping of bovine chemokine genes expressed in epithelial cells

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Copyright © 1999 by Springer-Verlag New York Inc.
Life Sciences; Cell Biology; Animal Genetics and Genomics; Human Genetics
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