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United States Department of Agriculture

Agricultural Research Service

Research Project: DEVELOPMENT OF GENOMIC TOOLS TO STUDY RUMINANT RESISTANCE TO GASTROINTESTINAL NEMATODES

Location: Animal Genomics and Improvement Laboratory

Title: Comparative analyses of transcriptomic profiles of the bovine small intestine in response to both a primary infection and a drug-attenuated reinfection

Authors
item LI, ROBERT
item LI, CONGJUN
item Gasbarre, Louis -

Submitted to: NIH Gene Expression Omnibus (GEO) Database
Publication Type: Other
Publication Acceptance Date: June 9, 2012
Publication Date: June 15, 2012
Citation: Li, R.W., Li, C., Gasbarre, L.C. 2012. Comparative analyses of transcriptomic profiles of the bovine small intestine in response to both a primary infection and a drug-attenuated reinfection . NIH Gene Expression Omnibus (GEO) Database. GSE24402.

Technical Abstract: Cooperia oncophora is an economically important gastrointestinal nematode in ruminants. Acquired resistance to Cooperia oncophora infection in cattle develops rapidly as a result of prior infections. Naïve cattle, when given a primary infection of high-dose infective L3 larvae, develop a strong immunity to subsequent reinfection. Compared to primary infection, reinfection resulted in a marked reduction in worm establishment. In order to understand molecular mechanisms underlying the development of acquired resistance, we characterized the transcriptomic responses of the bovine small intestine to a primary infection and reinfection. A total of 23 pathways were significantly impacted during infection. The vitamin D receptor activation was strongly induced only during reinfection, suggesting that this pathway may play an important role in the development of acquired resistance via its potential roles in immune regulation and intestinal mucosal integrity maintenance. The expression of inducible nitric oxide synthase (NOS2) was strongly induced during reinfection but not during primary infection. As a result, several canonical pathways associated with NOS2 were impacted. The genes involved in eicosanoid synthesis, including prostaglandin synthase 2 (PTGS2 or COX2), remained largely unchanged during infection. The rapid development of acquired resistance may help explain the lack of relative pathogenicity by Cooperia oncophora infection in cattle. Our findings facilitate the understanding of molecular mechanisms underlying the development of acquired resistance, which could have an important implication in vaccine design.

Last Modified: 7/25/2014
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