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- aggregation classification "A1".
- aggregation creator B38770.
- aggregation creator person.
- aggregation creator person.
- aggregation creator person.
- aggregation date "2001".
- aggregation format "application/pdf".
- aggregation hasFormat 145772.bibtex.
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- aggregation isPartOf urn:issn:0928-4249.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Medicine and Health Sciences".
- aggregation title "Apoptosis and necrosis of blood and milk polymorphonuclear leukocytes in early and midlactating healthy cows.".
- aggregation abstract "Increased milk somatic cell counts (SCC) are used as an indicator for bovine mastitis. During mastitis, polymorphonuclear leukocytes (PMN) become the predominant cell type. Shortly after parturition, the severity of mastitis is increased and several PMN functions are downregulated. Apoptotic and necrotic processes of PMN could influence SCC and PMN functions. In this study, the percentages of apoptotic and necrotic PMN in blood and milk from early and midlactating healthy cows were compared. Apoptosis and necrosis of PMN were quantified using a dual-color flow cytometric procedure with fluorescein labeled annexin-V (green) and propidium iodide (red). Using this technique three different subpopulations of bovine PMN could be detected: apoptotic cells (high intensive green fluorescence), necrotic cells (high intensive green and high intensive red fluorescence) and viable cells (low intensive green and low intensive red fluorescence). Following a 4 h incubation of blood from both groups of cows at 37 degreesC to induce apoptosis, the mean percentage of apoptotic blood PMN was significantly higher (P<0.01) in early lactating cows (15.1%, n=9) compared with midlactating cows (5.3%, n=10). The mean percentage of necrotic PMN remained lower than 5% in all cows. In contrast to blood, no significant difference was found between the percentage of apoptotic PMN in milk from early (41.2%, n=7) and midlactating cows (34.0%, n=8). The percentage of necrotic PMN in milk from early lactating cows (25.9%, n=7) was significantly higher than that in midlactating cows (14.2%, n=8) (P<0.05). Higher percentages of apoptotic as well as necrotic PMN were consistently found in milk compared to blood in all cows. From these results, it can be concluded that spontaneously induced apoptosis was higher in blood PMN from early lactating cows than in blood PMN from midlactating cows. The higher percentage of necrotic milk PMN in early lactating cows than in midlactating cows could be explained by the induction of secondary necrosis.".
- aggregation authorList BK98241.
- aggregation endPage "622".
- aggregation issue "6".
- aggregation startPage "617".
- aggregation volume "32".
- aggregation aggregates 985383.
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