title: A sentinel function for teat tissues in dairy cows: dominant innate immune response elements define early response to E. coli mastitis.
abstract: Escherichia coli intramammary infection elicits localized and systemic responses, some of which have been characterized in mammary secretory tissue. Our objective was to characterize gene expression patterns that become activated in different regions of the mammary gland during the acute phase of experimentally induced E. coli mastitis. Tissues evaluated were from Fürstenburg's rosette, teat cistern (TC), gland cistern (GC), and lobulo-alveolar (LA) regions of control and infected mammary glands, 12 and 24 h after bacterial (or control) infusions. The main networks activated by E. coli infection pertained to immune and inflammatory response, with marked induction of genes encoding proteins that function in chemotaxis and leukocyte activation and signaling. Genomic response at 12 h post-infection was greatest in tissues of the TC and GC. Only at 24 h post-infection did tissue from the LA region respond, at which time the response was the greatest of all regions. Similar genetic networks were impacted in all regions during early phases of intramammary infection, although regional differences throughout the gland were noted. Data support an important sentinel function for the teat, as these tissues responded rapidly and intensely, with production of cytokines and antimicrobial peptides.
authors.affiliation: USDA-ARS, Beltsville, MD 20705, USA.
authors.forename: Manuela
authors.initials: M
authors.lastname: Rinaldi
authors.forename: Robert W
authors.initials: RW
authors.lastname: Li
authors.forename: Douglas D
authors.initials: DD
authors.lastname: Bannerman
authors.forename: Kristy M
authors.initials: KM
authors.lastname: Daniels
authors.forename: Christina
authors.initials: C
authors.lastname: Evock-Clover
authors.forename: Marcos V B
authors.initials: MV
authors.lastname: Silva
authors.forename: Max J
authors.initials: MJ
authors.lastname: Paape
authors.forename: Bernadette
authors.initials: B
authors.lastname: Van Ryssen
authors.forename: Christian
authors.initials: C
authors.lastname: Burvenich
authors.forename: Anthony V
authors.initials: AV
authors.lastname: Capuco
mesh_terms: D000209:Acute-Phase Proteins / Q000235:genetics / Q000378:metabolism; D000818:Animals; D023181:Antimicrobial Cationic Peptides / Q000235:genetics / Q000378:metabolism; D001798:Blood Proteins / Q000235:genetics / Q000378:metabolism; D002199:Capillary Permeability / Q000235:genetics; D002417:Cattle / Q000276:immunology*; D002452:Cell Count; D016207:Cytokines / Q000235:genetics / Q000378:metabolism; D003612:Dairying; D015536:Down-Regulation / Q000235:genetics; D004926:Escherichia coli / Q000254:growth & development / Q000276:immunology*; D005260:Female; D020869:Gene Expression Profiling; D053263:Gene Regulatory Networks / Q000235:genetics; D007113:Immunity, Innate / Q000235:genetics / Q000276:immunology*; D008321:Mammary Glands, Animal / Q000276:immunology / Q000382:microbiology / Q000473:pathology* / Q000503:physiopathology; D008414:Mastitis, Bovine / Q000276:immunology* / Q000382:microbiology* / Q000473:pathology / Q000503:physiopathology; D008892:Milk / Q000166:cytology; D020411:Oligonucleotide Array Sequence Analysis; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013997:Time Factors; D051193:Toll-Like Receptors / Q000235:genetics / Q000378:metabolism; D015854:Up-Regulation / Q000235:genetics
chemical_list: D000209:Acute-Phase Proteins; D023181:Antimicrobial Cationic Peptides; D001798:Blood Proteins; D016207:Cytokines; D012333:RNA, Messenger; D051193:Toll-Like Receptors; C021623:bactericidal permeability increasing protein