Probiotic in lamb rennet paste enhances rennet lipolytic activity, and conjugated linoleic acid and linoleic acid content in Pecorino cheese

Santillo, A.; Albenzio, M.; Quinto, M.; Caroprese, M.; Marino, R.; Sevi, A.

doi:10.3168/jds.2008-1598

« Previous Next »Journal of Dairy Science
Volume 92, Issue 4 , Pages 1330-1337, April 2009

Probiotic in lamb rennet paste enhances rennet lipolytic activity, and conjugated linoleic acid and linoleic acid content in Pecorino cheese

A. Santillo
- Department of Production and Innovation in Mediterranean Agriculture and Food Systems (PrIME),University of Foggia, 71100 Foggia, Italy
M. Albenzio
- Department of Production and Innovation in Mediterranean Agriculture and Food Systems (PrIME),University of Foggia, 71100 Foggia, Italy
- Corresponding author.
M. Quinto
- Department of Agro-Environmental Science, Chemistry and Plant Protection (Di.S.A.C.D.), University of Foggia, 71100 Foggia, Italy
M. Caroprese
- Department of Production and Innovation in Mediterranean Agriculture and Food Systems (PrIME),University of Foggia, 71100 Foggia, Italy
R. Marino
- Department of Production and Innovation in Mediterranean Agriculture and Food Systems (PrIME),University of Foggia, 71100 Foggia, Italy
A. Sevi
- Department of Production and Innovation in Mediterranean Agriculture and Food Systems (PrIME),University of Foggia, 71100 Foggia, Italy

Received 31 July 2008; accepted 19 November 2008.

Abstract

Cheeses manufactured using traditional lamb rennet paste, lamb rennet paste containing Lactobacillus acidophilus, and lamb rennet paste containing a mix of Bifidobacterium lactis and Bifidobacterium longum were characterized for the lipolytic pattern during ripening. Lipase activity of lamb rennet paste, lamb rennet containing Lb. acidophilus, and lamb rennet containing a mix of bifidobacteria was measured in sheep milk cream substrate. Rennet paste containing probiotics showed a lipase activity 2-fold greater than that displayed by traditional rennet. Total free fatty acid (FFA) in sheep milk cream was lower in lamb rennet paste (981μg/g of milk cream) than in lamb rennet containing Lb. acidophilus (1,382.4μg/g of milk cream) and in lamb rennet containing a mix of bifidobacteria (1,227.5μg/g of milk cream) according to lipase activity of lamb rennet paste. The major increase of FFA in all cheeses occurred during the first 30 d of ripening with the greatest values being observed for C16:0, C18:0 C18:1. At 60 d of ripening all cheeses showed a reduction in the amount of free fatty acids; in particular, total free fatty acids underwent a decrease of more than 30% from 30 to 60 d in cheeses manufactured using traditional lamb rennet paste, whereas the same parameter decreased 10% in cheeses manufactured using lamb rennet paste containing Lb. acidophilus and cheeses manufactured using lamb rennet paste containing a mix of B. lactis and B. longum. Cheese containing Lb. acidophilus was characterized by the greatest levels of total conjugated linoleic acids (CLA) 9-cis, 11-trans CLA and 9-trans, 11-trans CLA, whereas cheese containing bifidobacteria displayed the greatest levels of free linoleic acid. Rennet pastes containing viable cells of Lb. acidophilus and a mix of B. lactis and B. longum were able to influence the amount of FFA and CLA in Pecorino cheese during ripening.