Seleno-Cystine Affects the Fatty Acid Profile in In Vitro Incubated Ovine Ruminal Fluid Containing α-Linolenic Acid

Marian Czauderna, Rozbicka Wieczorek A.j and Więsyk E

Animal Review, 2014, vol. 1, issue 3, 45-56

Abstract: The influence of seleno-cystine (CySe2) added to ovine ruminal fluids containing -linolenic acid ( LNA) on the profile of fatty acids (FA) was investigated. Fluids were incubated in vitro at 39°C under CO2 either alone (RF) or with LNA (1.67 mg/ml) or with a combination of LNA with either a low (1.34 μg/ml) or high (3.33 μg/ml) level of Se as CySe2. Fluids were removed after 0, 6, 12, 18, 24 hrs of incubation and then analyzed to determine FA levels. LNA added to the fluids without/with CySe2 decreased the C18 0 concentration for incubation at all times from 6 hrs compared with the RF or the fluid containing CySe2. LNA added to the fluids without/with CySe2 decreased the biohydrogenation yield to C18:0. CySe2 added to the fluids decreased the C18:0 concentration and the index of the biohydrogenation to C18:0 compared with the RF. The higher concentration of CySe2 in the fluids with LNA reduced the accumulation of trans11C18:1 for incubation at all times from 18 hrs compared with the fluids with LNA, irrespective of the presence of the lower concentration of CySe2. The lowest concentration of trans11C18:1 in the fluids with LNA and the higher concentration of CySe2 correlated with the lowest yield of the isomerization of LNA into cis9trans11cis15C18:3 and the lowest yield of the initial biohydrogenation of cis9trans11cis15C18:3 to trans11cis15C18:2 in the fluids containing LNA and the higher concentration of CySe2. CySe2 added to the fluids with LNA decreased the ratio of polyunsaturated FA to saturated FA for incubation at all times from 12 hrs compared with the fluids containing LNA. CySe2 in the fluids without/with LNA reduced the FA sum in the fluids.

Keywords: Selenium; -Linolenic acid; Ovine ruminal fluids; Fatty acids; Biohydrogenation; Isomerization. (search for similar items in EconPapers)
Date: 2014
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