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.: Home > Animal Science Papers and Reports > 2012 > Volume 30 Number 4 > Artur Jóźwik 1 , Józef Krzyżewski 1 *, Nina Strzałkowska 1 , Ewa Poławska 1 , Emilia Bagnicka 1 , Agnieszka Wierzbicka 2 , Krzysztof Niemczuk 3 , Paulina Lipińska 1 , Jarosław O. Horbańczuk

Relations between the oxidative status, mastitis , milk quality and disorders of reproductive functions in dairy cows - a review

Artur Jóźwik 1 , Józef Krzyżewski 1 *, Nina Strzałkowska 1 , Ewa Poławska 1 , Emilia Bagnicka 1 , Agnieszka Wierzbicka 2 , Krzysztof Niemczuk 3 , Paulina Lipińska 1 , Jarosław O. Horbańczuk
Polish Academy of Sciences Institute of Genetics and Animal Breeding, Jastrzębiec, Postępu 1, 05-552 Magdalenka, Poland
Abstract :
Free radicals are natural final products of the intensive metabolism in cells located in organism
high-yielding dairy cows. When the disturbing of homeostasis occurs, oxidative processes lead
to oxidative stress which in high-yielding dairy cows cause inflammation of the mammary gland
(
mastitis
).
The inflammation can cause the reduction of milk yield and unfavourable changes in the
milk composition, e.g. reduction in fat, casein proteins and calcium content with a simultaneous
increase in the concentration of whey proteins, sodium and chlorine. Moreover, the activity of
enzymes such a lipases, proteases, peroxides and the plasminogen in milk increases, negatively
affecting its technological properties. In dairy cows the oxidative stress is associated with retaining
placenta after calving and disrupting the activity of the
corpus luteum
, what affect the reproductive
functions. The active immune response to inflammation leads to an increase in the secretion of other

molecules having an adverse effect on embryo survival

Keywords :
cell /cow /mammary gland /mastitis /milk production /oxidative stress / reactive oxygen species

Date Deposited : 01 Apr 2015 15:53

Last Modified : 01 Apr 2015 15:53

Official URL: http://www.ighz.edu.pl/?p0=5&p1=34&o=7497

Volume 30, Number 4, - 2012

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