Activities of indigenous proteolytic enzymes in caprine milk of different somatic cell counts

Journal of Dairy Science
Marzia AlbenzioAgostino Sevi

Abstract

Individual caprine milk with different somatic cell counts (SCC) were studied with the aim of investigating the percentage distribution of leukocyte cell types and the activities of indigenous proteolytic enzymes; proteolysis of casein was also studied in relation to cell type following recovery from milk. The experiment was conducted on 5 intensively managed dairy flocks of Garganica goats; on the basis of SCC, the experimental groups were denoted low (L-SCC; <700,000 cells/mL), medium (M-SCC; from 701,000 to 1,500,000 cells/mL), and high (H-SCC; >1,501,000 cells/mL) SCC. Leukocyte distribution differed between groups; polymorphonuclear neutrophilic leukocytes were higher in M-SCC and H-SCC milk samples, the percentage macrophages was the highest in H-SCC, and levels of nonviable cells significantly decreased with increasing SCC. Activities of all the main proteolytic enzymes were affected by SCC; plasmin activity was the highest in H-SCC milk and the lowest in L-SCC, and elastase and cathepsin D activities were the highest in M-SCC. Somatic cell count influenced casein hydrolysis patterns, with less intact α- and β-casein in H-SCC milk. Higher levels of low electrophoretic mobility peptides were detected in sodium caseinate i...Continue Reading

References

Feb 1, 1988·Journal of Dairy Science·A I SaemanD M Barbano
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Dec 26, 2008·Journal of Dairy Science·M AlbenzioA Sevi
Dec 8, 2010·The Journal of Dairy Research·Marzia Albenzio, Mariangela Caroprese

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Citations

Mar 8, 2016·Journal of Dairy Science·M AlbenzioA Sevi
Nov 21, 2017·Journal of Dairy Science·Stephanie Clark, María Bárbara Mora García
Jun 3, 2021·Foods·Klára PodhoreckáOndřej Elich

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