Curraleiro Pé Duro cattle breed (Bos taurus) differ in phagocytic Neutrophil function related to crossbreed cattle (Bos taurus X Bos indicus).

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Author(s): JULIANO, R. S.; FIORAVANTI, M. C. S.; SILVA, A. R. B.; SOUZA, S. N.; OLIVEIRA, H. F.; COUTO, S. C. P.; MUN IZ JUNQUEIRA, M. I.

Summary: This work aimed to evaluate hematological parameters and phagocytic neutrophil functions of naturally selected Curraleiro Pé Duro cattle breed (Bos taurus) and crossbreed cattle (Bos taurus X Bos indicus). Two groups of adult cows: Natural= Curraleiro Pé Duro cattle breed (n=10) and Selected = ¾ Nelore X Simental crossbreed animals (n=10) were evaluated. Blood was sampled to make hemogram, in vitro evaluation of neutrophil phagocytosis and basal Nitroblue Tetrazolium - NBT reduction (without any stimulus). The results showed no difference in hematological parameters between these groups. Natural group had greater phagocytic index of neutrophils through pathogen-associated molecular patterns receptors (PAMPs) while in Selected group this same index was greater using opsonin receptors. The reduction of NBT was lower for Natural group than Selected group. In conclusion, we suggest that both animal groups showed differences in neutrophil phagocytic functions in relation to pathway activation and Curraleiro Pé Duro cattle breed produced more oxygen radicals (superoxide, O2-) than the other tested group.

Publication year: 2016

Types of publication: Journal article

Unit: Embrapa Pantanal

Keywords: Blood composition, Fagocitose, Hematologia, Hematologic tests, Imunidade inata, Local cattle breed, Metabolismo oxidative, Oxidative metabolism, Produção animal, Raça bovina local, innate immunity, phagocytosis

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