Significance of Coprophagy for the Fatty Acid Profile in Body Tissues of Rabbits Fed Different Diets

Leiber, Florian; Meier, Janina S.; Burger, B.; Wettstein, H.-R.; Kreuzer, Michael; Hatt, Jean‐Michel; Clauß, Marcus

doi:10.1007/s11745-008-3210-5

Cited by 51 publications

(52 citation statements)

References 46 publications

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“…As described for other FAs such as c9,t11-CLA, this FA could be formed by intestinal bacteria and then absorbed by rabbits through cecotrophy (Gó mez-Conde et al, 2006; Leiber et al, 2008).…”

Section: Resultsmentioning

confidence: 91%

“…The content of the different CLA isomers in rabbit tissues could not only be attributed to a direct incorporation from diet since c9,t11-CLA can be synthesized from t11-18:1 by D9-desaturase in tissues (Lo Fiego et al, 2005;Palmquist et al, 2005;Corino et al, 2007). CLA can also be formed by bacterial fermentation in the large intestine, and as they are poorly absorbed there, they are excreted in the feces (Leiber et al, 2008), and through cecotrophy, CLA and other FA metabolites could reach the tissues (Lo Fiego et al, 2005;Gó mez-Conde et al, 2006;Leiber et al, 2008). Although the effect of coprophagy is marginal on the rabbit tissue FA composition, it is not negligible for the content of some FA as CLA (Leiber et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…CLA can also be formed by bacterial fermentation in the large intestine, and as they are poorly absorbed there, they are excreted in the feces (Leiber et al, 2008), and through cecotrophy, CLA and other FA metabolites could reach the tissues (Lo Fiego et al, 2005;Gó mez-Conde et al, 2006;Leiber et al, 2008). Although the effect of coprophagy is marginal on the rabbit tissue FA composition, it is not negligible for the content of some FA as CLA (Leiber et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

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Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Tres

Bou

Codony

et al. 2010

Animal

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The effects of the addition of heated oils to feeds (3%, w/w) and the dietary supplementation with a-tocopheryl acetate (TA; 100 mg/kg) and Zn (200 mg/kg) on rabbit tissue fatty acid (FA) composition and on the Zn, Cu, Fe and Se content in meat were assessed. Heating unrefined sunflower oil (SO) at 558C for 245 h increased its content in primary oxidation products and reduced its a-tocopherol content. However, this did not significantly affect tissue FA composition. Heating SO at 1408C for 31 h increased its content in secondary oxidation products and in some FA isomers as c9,t11-CLA and di-trans CLA. This led to increases in di-trans CLA in liver and in t9,c12-18:2 in meat. The c9,t11-CLA was the most incorporated CLA isomer in tissues. The dietary supplementation with a-TA did not affect the FA composition of plasma, liver or meat. The cooking of vacuum-packed rabbit meat at 788C for 5 min reduced significantly but slightly its polyunsaturated FA content. The dietary supplementation with Zn did not modify the content of Zn, Fe or Se in meat, but it reduced its Cu content. On the other hand, it increased the content of some FAs in meat when SO heated at 1408C for 31 h was added to feeds.Keywords: heated oils, fatty acid composition, plasma, liver, meat Implications An animal's diet has an influence on the composition of its tissues, which can be used to improve the nutritional value of meat, for instance modifying its fatty acid (FA) composition or increasing its mineral content. Unsaturated fat products used in feeds are prone to oxidation that can occur both during their production process and their storage, leading to a high content of oxidation compounds and altering their FA profile. This might affect the tissue composition, and thus the meat nutritional value. We studied the influence of the addition of oxidized oils and minerals to rabbit feeds on the FA composition of its plasma, liver and meat and on its meat element content. IntroductionFatty acid (FA) composition of animal tissues can be modified by the type and amount of dietary fat (Wood and Enser, 1997). Dietary recommendations for humans suggest reducing the intake of not only fat and cholesterol but also saturated FAs (SFA) and trans FA, and increasing the intake of polyunsaturated FAs (PUFAs), mainly those from the n-3 series (Food and Nutrition Board, 2005). Therefore, in order to obtain more healthy meat, several unsaturated fat sources have been incorporated to feeds to nutritionally improve meat FA composition (Wood and Enser, 1997).However, unsaturated fat sources are prone to oxidation that can occur both at low and high temperatures. At low temperatures, for instance during storage of unsaturated fats at ambient temperature, lipid hydroperoxides (LHPs) increase until they reach a plateau, and then decompose into secondary oxidation compounds. At high temperatures, decomposition of LHP is faster and isomerization of FA is also favored, leading to the appearance of both geometric and positional FA isomers, as several trans FA and conjugate...

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Tres

Bou

Codony

et al. 2010

Animal

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“…This effect was also significant in liver and plasma, because odd-chain and branched-chain FAs were also higher in rabbit (Tables 5 and 6). Rabbit's dietary habits include coprophagy (Leiber et al, 2008). Rabbits produce a particular kind of soft faeces, the caecotrophs.…”

Section: Resultsmentioning

confidence: 99%

“…The FA profile of the caecotrophs is rich in saturated FA (SFA) and odd-chain and branched-chain FAs because of the microbial fermentation that takes place in the caecum. Thus, by ingestion of the caecotrophs, these FAs might be reabsorbed and reach tissues, although the overall impact of coprophagy on the general tissue FA composition is not substantial (Leiber et al, 2008;Tres et al, 2008). Multifactor ANOVA (n 5 48, chicken 1 rabbit) was conducted to study whether the factor 'level of oxidation of oil added to feeds' led to different effects between animal species.…”

Section: Resultsmentioning

confidence: 99%

Use of recovered frying oils in chicken and rabbit feeds: effect on the fatty acid and tocol composition and on the oxidation levels of meat, liver and plasma

Tres

Bou

Guardiola

et al. 2013

Animal

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The addition of some fat co-and by-products to feeds is usual nowadays; however, the regulations of their use are not always clear and vary between countries. For instance, the use of recycled cooking oils is not allowed in the European Union, but they are used in other countries. However, oils recovered from industrial frying processes could show satisfactory quality for this purpose. Here we studied the effects of including oils recovered from the frying industry in rabbit and chicken feeds (at 30 and 60 g/kg, respectively) on the fatty acid (FA) and tocol (tocopherol 1 tocotrienol) compositon of meat, liver and plasma, and on their oxidative stability. Three dietary treatments (replicated eight times) were compared: fresh non-used oil (LOX); oil discarded from the frying industry, having a high content of secondary oxidation compounds (HOX); and an intermediate level (MOX) obtained by mixing 50 : 50 of LOX and HOX. The FA composition of oil diets and tissues was assessed by GC, their tocol content by HPLC, the thiobarbituric acid value was used to assess tissue oxidation status, and the ferrous oxidation-xylenol orange method was used to assess the susceptibility of tissues to oxidation. Our results indicate that FA composition of rabbit and chicken meat, liver and plasma was scarcely altered by the addition of recovered frying oils to feed. Differences were encountered in the FA composition between species, which might be attributed mainly to differences in the FA digestion, absorption and metabolism between species, and to some physiological dietary factors (i.e. coprophagy in rabbits that involves fermentation with FA structure modification). The a-tocopherol (aT) content of tissues was reduced in response to the lower aT content in the recovered frying oil. Differences in the content of other tocols were encountered between chickens and rabbits, which might be attributable to the different tocol composition of their feeds, as well as to species differences in the digestion and metabolism of tocols. Tissue oxidation and susceptibility to oxidation were in general low and were not greatly affected by the degree of oxidation of the oil added to the feeds. The relative content of polyunsaturated fatty acids/aT in these types of samples would explain the differences observed between species in the susceptibility of each tissue to oxidation. According to our results, oils recovered from the frying industry could be useful for feed uses.Keywords: vegetable frying oils, tissue lipid composition, feed ingredients, oxidability, vitamin E ImplicationsVarious fat by-products of the food chain are included in feeds. Recycled cooking oils are not intended for feed uses in the European Union, although they might be used in other countries. However, oils recovered from industrial frying processes could show satisfactory quality for this purpose. Thus, here we studied how the addition of frying oils to feeds affects the lipid composition and the stability of meat and other animal tissues. Our results reveal an acceptable ...

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Effect of dietary organic selenium on fatty acid composition in nutria (Myocastor coypus Mol.) livers

Głogowski

Czauderna

Rozbicka-Wieczorek

et al. 2013

Euro J Lipid Sci & Tech

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Young, female nutrias (n ¼ 13) were fed a diet supplemented with 0.36 mg/kg selenium in seleniumenriched yeast (SeY; Sel-Plex; Alltech, Inc., Nicholasville, KY) for 60 days (total Se concentration in the basal diet was $0.1 mg/kg). Concentrations of fatty acids (FA) in the liver were compared to those of nutrias on a control diet (n ¼ 11). Animals were sacrificed at 8 months of age and liver samples (approximately 30 g) were collected. The gas-chromatographic analysis of tissue samples from the experimental group revealed a significant decrease in saturated fatty acids ( p < 0.001), monounsaturated fatty acid ( p ¼ 0.006), and polyunsaturated fatty acid (PUFA) ( p ¼ 0.02) compared to controls. The linoleic and linolenic acids, which are precursors of n-6 and n-3 PUFA, respectively, were significantly lower ( p ¼ 0.01 and p < 0.001, respectively) in the supplemented group. The n-6 to n-3 PUFA ratio was significantly affected ( p ¼ 0.001) by the SeY dietary supplement (13.17 vs. 8.93, respectively).

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Significance of Coprophagy for the Fatty Acid Profile in Body Tissues of Rabbits Fed Different Diets

Cited by 51 publications

References 46 publications

Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Use of recovered frying oils in chicken and rabbit feeds: effect on the fatty acid and tocol composition and on the oxidation levels of meat, liver and plasma

Effect of dietary organic selenium on fatty acid composition in nutria (Myocastor coypus Mol.) livers

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