02780naa a2200313 a 450000100080000000500110000800800410001910000170006024500870007726000090016452019020017365000250207565000150210065000090211565000090212465000100213365000110214365300240215465300240217865300280220265300250223070000230225570000210227870000200229970000170231970000170233670000240235377300890237720396472016-03-04       2015    bl uuuu     u00u1 u    #d1 aLEMOS, V. F.  aEffects of intramammary infection on whey proteinograms os sheep during lactation.  c2015  aThe study aimed to identify potential biomarkers of mammary gland infection in Santa Inês sheep. Commercial flocks of sheep provided the same hygiene, sanitary, and nutritional management under semi-intensive production systems were monitored during the lactation stage-and assessed 15, 30, 60, and 90 days after delivery (through the end of lactation and weaning). The California Mastitis Test (CMT) was performed on the mammary glands. Milk was collected for bacterial examination and protein analysis. Bacterial culture and biochemical characterization of the samples were performed. Forty-two milk samples from healthy glands (negative CMT and bacterial testing) and 43 milk samples from infected glands (positive CMT and bacterial testing) taken at the predefined time points were assessed. A rennin solution was used to obtain the whey. The proteins analysis was performed using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), which allowed for the quantification of nine whey proteins produced in healthy glands: serum albumin, lactoferrin, IgA, IgG heavy-chain (IgG HC), IgG light-chain (IgG LC), total IgG (IgG HC + IgG LC), ?-lactalbumin, ?-lactoglobulin, protein with MW 15.000 Da, protein with MW 29.000 Da and eleven whey proteins secreted by infected glands, including haptoglobin and ?-1-acid glycoprotein. A comparison of whey proteins between healthy and infected glands showed increases (P&lt0.05) in the secreted and total contents of all proteins, except for IgG LC and ?-lactoalbumin. The most significant changes were observed in ?-1- acid glycoprotein, lactoferrin and haptoglobin, which showed three-, five-, and seven-fold increases in secretion, respectively. This study showed that haptoglobin, ?-1-acid glycoprotein, lactoferrin, albumin, and the IgA and IgG immunoglobulins may serve as potential biomarkers for mammary gland infection in sheep.  aAcute phase proteins  aBiomarkers  aEwes  aMilk  aLeite  aOvelha  aMarcador biológico  aMastite subclínica  aProteína de fase aguda  aSubclinical mastitis1 aGUARANÁ, E. L. S.1 aAFONSO, J. A. B.1 aFAGLIARI, J. J.1 aSILVA, P. C.1 aSOARES P. C.1 aMENDONÇA, C. L. de  tPesquisa Veterinária Brasileira, Brasília, DFgv. 35, n. 3, p. 230-236, mar. 2015.