Ioannis Politis

Summary

Affiliation: Agricultural University of Athens
Country: Greece

Publications

  1. doi request reprint Reevaluation of vitamin E supplementation of dairy cows: bioavailability, animal health and milk quality
    I Politis
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 11855 Athens, Greece
    Animal 6:1427-34. 2012
  2. ncbi request reprint Soya protein hydrolysates modify the expression of various pro-inflammatory genes induced by fatty acids in ovine phagocytes
    Ioannis Politis
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos, Athens, Greece
    Br J Nutr 108:1246-55. 2012
  3. doi request reprint Short communication: Oxidative status and incidence of mastitis relative to blood α-tocopherol concentrations in the postpartum period in dairy cows
    I Politis
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 11855 Athens, Greece
    J Dairy Sci 95:7331-5. 2012
  4. ncbi request reprint Effects of dietary conjugated linoleic acid isomers on several functional properties of macrophages and heterophils in laying hens
    I Politis
    Department of Animal Science, Agricultural University of Athens, 11855 Athens, Greece
    Br Poult Sci 44:203-10. 2003
  5. ncbi request reprint The effect of various vitamin E derivatives on the urokinase-plasminogen activator system of ovine macrophages and neutrophils
    I Politis
    Department of Animal Science, Agricultural University of Athens, Athens 118 55, Greece
    Br J Nutr 89:259-65. 2003
  6. ncbi request reprint Effect of vitamin E supplementation on neutrophil function, milk composition and plasmin activity in dairy cows in a commercial herd
    Ioannis Politis
    Department of Animal Production, Agricultural University of Athens, Athens 11855, Greece
    J Dairy Res 71:273-8. 2004
  7. ncbi request reprint Use of Trichosporon mycotoxinivorans to suppress the effects of ochratoxicosis on the immune system of broiler chicks
    I Politis
    Department of Animal Science, Agricultural University of Athens, Athens, Greece
    Br Poult Sci 46:58-65. 2005
  8. doi request reprint Acute mastitis induces upregulation of expression of plasminogen activator-related genes by blood monocytes and neutrophils in dairy ewes
    Georgios Theodorou
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos St, 11855 Athens, Greece
    Vet Immunol Immunopathol 138:124-8. 2010
  9. ncbi request reprint Expression of urokinase plasminogen activator receptor in resting and activated bovine neutrophils
    Ioannis Politis
    Department of Animal Production, Agricultural University of Athens, Greece
    J Dairy Res 69:195-204. 2002
  10. doi request reprint The ovine plasminogen activator inhibitors type 1 and type 2 cDNAs: molecular cloning, characterization and expression in various tissues
    Giorgos Theodorou
    Department of Animal Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
    Gene 454:20-30. 2010

Collaborators

Detail Information

Publications23

  1. doi request reprint Reevaluation of vitamin E supplementation of dairy cows: bioavailability, animal health and milk quality
    I Politis
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 11855 Athens, Greece
    Animal 6:1427-34. 2012
    ..Conditional or opposite effects have not been repeated and require further research before changing recommendations for vitamin E supplementation...
  2. ncbi request reprint Soya protein hydrolysates modify the expression of various pro-inflammatory genes induced by fatty acids in ovine phagocytes
    Ioannis Politis
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos, Athens, Greece
    Br J Nutr 108:1246-55. 2012
    ..Soya protein peptides inhibit all changes in gene expression induced by fatty acids in ovine phagocytes in vitro. This constitutes a novel mechanism of action...
  3. doi request reprint Short communication: Oxidative status and incidence of mastitis relative to blood α-tocopherol concentrations in the postpartum period in dairy cows
    I Politis
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 11855 Athens, Greece
    J Dairy Sci 95:7331-5. 2012
    ..However, reduction in the incidence of mastitis is not mediated through a reduction in the levels of various biomarkers of oxidative stress...
  4. ncbi request reprint Effects of dietary conjugated linoleic acid isomers on several functional properties of macrophages and heterophils in laying hens
    I Politis
    Department of Animal Science, Agricultural University of Athens, 11855 Athens, Greece
    Br Poult Sci 44:203-10. 2003
    ....
  5. ncbi request reprint The effect of various vitamin E derivatives on the urokinase-plasminogen activator system of ovine macrophages and neutrophils
    I Politis
    Department of Animal Science, Agricultural University of Athens, Athens 118 55, Greece
    Br J Nutr 89:259-65. 2003
    ..Thus, PK C modulates the effect of alpha-TS on the u-PA system of ovine macrophages and neutrophils...
  6. ncbi request reprint Effect of vitamin E supplementation on neutrophil function, milk composition and plasmin activity in dairy cows in a commercial herd
    Ioannis Politis
    Department of Animal Production, Agricultural University of Athens, Athens 11855, Greece
    J Dairy Res 71:273-8. 2004
    ..In conclusion, vitamin E supplementation had positive effects on the function of bovine neutrophils and milk quality in a commercial dairy herd...
  7. ncbi request reprint Use of Trichosporon mycotoxinivorans to suppress the effects of ochratoxicosis on the immune system of broiler chicks
    I Politis
    Department of Animal Science, Agricultural University of Athens, Athens, Greece
    Br Poult Sci 46:58-65. 2005
    ..There was a delay of 30d before the immunosuppressive effect became apparent. The dietary inclusion of TRM completely blocked the detrimental effects of OTA on several immune properties in broilers...
  8. doi request reprint Acute mastitis induces upregulation of expression of plasminogen activator-related genes by blood monocytes and neutrophils in dairy ewes
    Georgios Theodorou
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos St, 11855 Athens, Greece
    Vet Immunol Immunopathol 138:124-8. 2010
    ....
  9. ncbi request reprint Expression of urokinase plasminogen activator receptor in resting and activated bovine neutrophils
    Ioannis Politis
    Department of Animal Production, Agricultural University of Athens, Greece
    J Dairy Res 69:195-204. 2002
    ..Thus, PKC plays a role in the modulation of u-PA and u-PAR by PMA in bovine neutrophils...
  10. doi request reprint The ovine plasminogen activator inhibitors type 1 and type 2 cDNAs: molecular cloning, characterization and expression in various tissues
    Giorgos Theodorou
    Department of Animal Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
    Gene 454:20-30. 2010
    ....
  11. ncbi request reprint Short communication: study of immune parameters in three Greek dairy sheep breeds during the periparturient period
    G Theodorou
    Department of Animal Science, Agricultural University of Athens, 11855 Athens, Greece
    J Dairy Sci 90:5567-71. 2007
    ..Thus, mild immunosuppression during the periparturient period was observed in the 2 breeds with the highest milk production...
  12. doi request reprint Effect of growth factors and lactogenic hormones on expression of plasminogen activator-related genes and cell proliferation in a bovine mammary epithelial cell line
    Georgios Theodorou
    Department of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece
    J Dairy Res 78:365-72. 2011
    ..Thus, dexamethasone acting synergistically with prolactin or insulin inhibits the activation of the plasmin-plasminogen system but this inhibition is not correlated with any changes in cell proliferation...
  13. ncbi request reprint The effect of two bovine beta-casein peptides on various functional properties of porcine macrophages and neutrophils: differential roles of protein kinase A and exchange protein directly activated by cyclic AMP-1
    R Chronopoulou
    Department of Animal Science, Agricultural University of Athens, Athens 11855, Greece
    Br J Nutr 96:553-61. 2006
    ....
  14. ncbi request reprint Effect of vitamin E supplementation on various functional properties of macrophages and neutrophils obtained from weaned piglets
    S Fragou
    Department of Animal Production, Agricultural University of Athens, 11855 Athens, Greece
    J Vet Med A Physiol Pathol Clin Med 51:178-83. 2004
    ..In conclusion, the low level of vitamin E supplementation is recommended for piglets for the first 2 weeks after weaning...
  15. ncbi request reprint In vitro evaluation of iron solubility and dialyzability of various iron fortificants and of iron-fortified milk products targeted for infants and toddlers
    Maria Kapsokefalou
    Department of Food Science and Technology, Agricultural University of Athens, Iera Odos, Athens, Greece
    Int J Food Sci Nutr 56:293-302. 2005
    ..In conclusion, the type of iron source, milk processing and the overall product composition affect formation of ferrous dialyzable iron and may determine the success and effectiveness of iron fortification of milk...
  16. doi request reprint Milk peptides and immune response in the neonate
    Ioannis Politis
    Department of Animal Science, Agricultural University of Athens, Athens 11855, Greece
    Adv Exp Med Biol 606:253-69. 2008
    ..2005). This chapter focuses on the effects of milk peptides on immune function and attempts to provide an overview of the knowledge available in this field...
  17. doi request reprint Effect of high-pressure treatment at various temperatures on indigenous proteolytic enzymes and whey protein denaturation in bovine milk
    Golfo Moatsou
    Department of Food Science and Technology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
    J Dairy Res 75:262-9. 2008
    ....
  18. doi request reprint The ovine urokinase plasminogen activator and its receptor cDNAs: molecular cloning, characterization and expression in various tissues
    Giorgos Theodorou
    Department of Animal Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
    Gene 443:158-69. 2009
    ..These data are consistent with the notion that upregulation of u-PA and u-PAR expression may play a key role in the process of involution of the mammary gland...
  19. doi request reprint Leucocyte expression of genes implicated in the plasminogen activation cascade is modulated by yoghurt peptides
    Georgios Theodorou
    Department of Animal Science and Aquaculture, Agricultural University of Athens, Athens, Greece
    J Dairy Res 83:360-5. 2016
    ..In conclusion, peptides present in WSE modulated the expression of u-PA related genes but the effect was much more prominent in monocytes than in neutrophils. ..
  20. ncbi request reprint Effects of vitamin E on urokinase-plasminogen activator receptor expression by bovine neutrophils
    I Politis
    Department of Animal Production, Agricultural University of Athens, Greece
    Am J Vet Res 62:1934-8. 2001
    ..Rapid recruitment of neutrophils is critical for proper defense of the gland...
  21. ncbi request reprint Effect of vitamin E supplementation on lymphocyte distribution in gut-associated lymphoid tissues obtained from weaned piglets
    S Fragou
    Department of Animal Production, Agricultural University of Athens, 11855 Athens, Greece
    J Vet Med A Physiol Pathol Clin Med 53:327-33. 2006
    ..The numbers of CD4+ and CD8+ T-lymphocytes as well as IgA+ B-lymphocytes per follicle were higher by 26-77% (P < 0.05) in the mesenteric lymph nodes than the corresponding values in the Peyer's patch...
  22. ncbi request reprint Factors affecting the plasmin-plasminogen system in milk obtained from three Greek dairy sheep breeds with major differences in milk production capacity
    G Theodorou
    Department of Animal Science, Agricultural University of Athens, 11855 Athens, Greece
    J Dairy Sci 90:3263-9. 2007
    ..No relationship was found between PL activity and daily milk yield in the 3 Greek dairy sheep breeds. Plasmin is not a marker for gradual involution in the Greek sheep breeds studied...
  23. ncbi request reprint Effects of retinoids on proliferation and plasminogen activator expression in a bovine mammary epithelial cell line
    Federica Cheli
    Department of Veterinary Science and Technology for Food Safety, University of Milan, Milan, Italy 20134
    J Dairy Res 70:367-72. 2003
    ..05) on u-PA mRNA levels. Thus, retinoids are effective inhibitors of bovine mammary epithelial cell proliferation and this growth inhibition does not seem to correlate with any changes in u-PA mRNA or u-PA activity...