Impact of microbial cultures on conjugated linoleic acid in dairy products—a review

Sieber, R.; Collomb, M.; Aeschlimann, A.; Jelen, P.; Eyer, H.

doi:10.1016/s0958-6946(03)00151-1

Cited by 171 publications

(157 citation statements)

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“…The formation of CLA isomers and their precursors in the ruminal fluids can be explained by the conversion of dietary PUFA through group A ruminal bacteria (Bauman et al, 2003;Sieber et al, 2004;Buccioni et al, 2012). As the first step, cis,trans and/or trans,cis conjugated FA derived from αLNA, LA or γ-linolenic acid (c6c9c12C18:3; γLNA) were formed due to the activity of an isomerase (linoleate isomerase; EC 5.2.1.5) from anaerobic bacterium Butyrivibrio fibrisolvens.…”

Section: Discussionmentioning

confidence: 99%

“…Low-fibre diets stimulated the activity of other ruminal bacteria, such as Megasphaera (n.) elsdenii strains YJ-4 and T81, which are able to produce significant amounts of t10c12CLA, but not of some other strains (e.g. strains B159, AW106, and JL1) (Kim et al, 2002, Sieber et al, 2004Buccioni et al, 2012). The results summarized in Table 5 indicated that Se IV and Se VI added to the fluid with LO impact the capacities of the cis-12,trans-11 and cis-9,trans-10 isomerases, which isomerize the cis-12 and cis-9 bonds into the trans-11 and trans-10 bonds, respectively The lower concentration of Se IV and particularly Se VI in the fluids with LO usually increased the level of t10c12CLA compared with the control fluid and the fluids with LO and the higher concentration of Se IV or Se VI .…”

Section: Discussionmentioning

confidence: 99%

“…LPUFAn-3, abundantly present in fish oils, may provide a natural protection against biohydrogenation by the ruminal microorganisms (Burns et al, 2003;Chow et al, 2004;Wąsowska et al, 2006a;Buccioni et al, 2012). Recent studies revealed that selenate (Se VI ) or selenite (Se IV ) changed the contents of the FA, especially the CLA isomers and other conjugated FA, in the ovine ruminal fluid (Sieber et al, 2004;Wąsowska et al, 2006b;Czauderna et al, 2010Czauderna et al, , 2012a, the liver, muscles, internal organs and adipose tissues of animals (Czauderna et al, 2004a(Czauderna et al, , b, 2007Korniluk et al, 2006;Niedźwiedzka et al, 2008;Krajewska et al, 2012). Analysis of the selenium (Se) concentration of the microorganisms revealed that the ruminal microbial Se abundance was enriched relative to the level of Se in the diets.…”

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confidence: 99%

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Selenite and selenate affect the fatty acid profile in in vitro incubated ovine ruminal fluid containing linseed oil

Czauderna¹,

Kowalczyk²,

Marounek³

2013

CZECH J ANIM SCI

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ABSTRACT:The influence of selenite (Se IV ) or selenate (Se VI ) added to ovine ruminal fluid containing linseed oil (LO) on the profile of fatty acids (FA), particularly conjugated linoleic acid (CLA) isomers, was investigated. The ruminal fluid was incubated in vitro at 39°C under CO 2 either alone (the control fluid) or with LO (3.3 mg/ml) or with a combination of LO with either a low (0.167 μg/ml) or high (1.67 μg/ml) level of Se as Se IV or Se VI . LO added to ruminal fluids also provides an extra source of energy. The tubes with the examined fluids were removed after 0, 6, 12, 18, or 24 h of in vitro incubation and then analyzed to determine the FA levels. The lower and higher concentration of Se IV in the fluids with the LO revealed negligible effect on the concentration of the sum of the CLA isomers (∑CLA) in the fluid compared with the fluid with LO alone. The addition of a higher amount of Se IV to the fluid containing LO usually decreased the concentration of ∑CLA compared with the fluid containing the lower concentration of Se IV and LO. The concentration of c9t11c15C18:3 (cLNA) in the fluids with LO, irrespective of the presence of extra Se, increased throughout the incubations, although the addition of Se IV or Se VI to the fluids containing LO numerically reduced the increase of the concentration of cLNA compared with the fluid with LO alone. The concentration sum of the C18:1 isomers (ΣC18:1) in the control fluid numerically decreased throughout the incubations, while LO added to the fluid increased the concentration of ΣC18:1 throughout the incubations. LO added to the fluid, irrespective of the presence of Se IV or Se VI , significantly increased the concentration of ΣC18:1 compared with the control fluid and the fluids with Se IV or Se VI . The concentrations of C16:0 and C18:0 in the control fluid and the fluids containing Se IV or Se VI numerically increased throughout the incubations and were usually lower than in the fluids containing LO without or with Se IV or Se VI . The concentration of C18:3n-3 decreased throughout the incubation of the fluids containing LO, irrespective of the presence of Se IV or Se VI . LO added to the fluids, irrespective of the presence of Se IV or Se VI , increased the concentration of C18:2n-6 compared with the control fluid and the fluids with Se IV or Se VI . The higher concentration of Se IV or Se VI in the fluid with LO most efficiently increased the concentration of c5c8c11c14c17C20:5 compared with the control fluid or the fluids containing LO, irrespective of the presence of the lower concentration of Se IV or Se VI . LO added to the fluid, irrespective of the presence of Se IV or Se VI , increased the concentration of polyunsaturated FA compared with the control fluid or the fluids containing Se IV or Se VI .

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Selenite and selenate affect the fatty acid profile in in vitro incubated ovine ruminal fluid containing linseed oil

Czauderna¹,

Kowalczyk²,

Marounek³

2013

CZECH J ANIM SCI

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“…Trans-10, cis-12 CLA is only biosynthesized in the rumen by some bacteria. 13) Therefore, these bacterial populations may affect the ratio of cis-9, trans-11 CLA to trans-10, cis-12 CLA in ruminants. Changes in the bacterial population in the rumen are often caused by a decreased pH value, as indicated by increased propionate production.…”

Section: Discussionmentioning

confidence: 99%

“…CLA has numerous beneficial physiological effects, including anti-cancer, [1][2][3] anti-diabetes, 4) enhancing the immune response, 5) reducing atherosclerasis, [6][7][8] and reducing fat mass. [9][10][11][12][13] Recent studies have shown cis-9, trans-11 CLA and trans-10, cis-12 CLA to be the main biologically active isomers, but they produce different physiological effects. 14) Cis-9, trans-11 CLA is an anticancer isomer, 15) and trans-10, cis-12 CLA is an antilipogenesis isomer.…”

mentioning

confidence: 99%

Production of Lean Beef Containing a High Content oftrans-10,cis-12Conjugated Linoleic Acid by Feeding a High-Temperature-Micro-Time-Treated Diet with Extruded Soybean

Lee

Lee³

et al. 2006

Bioscience, Biotechnology, and Biochemistry

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Functional Meat Products

Arihara

Ohata

2010

Handbook of Meat Processing

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Impact of microbial cultures on conjugated linoleic acid in dairy products—a review

Cited by 171 publications

References 101 publications

Selenite and selenate affect the fatty acid profile in in vitro incubated ovine ruminal fluid containing linseed oil

Selenite and selenate affect the fatty acid profile in in vitro incubated ovine ruminal fluid containing linseed oil

Production of Lean Beef Containing a High Content oftrans-10,cis-12Conjugated Linoleic Acid by Feeding a High-Temperature-Micro-Time-Treated Diet with Extruded Soybean

Functional Meat Products

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