Influence of Different Dietary Fats on the Incorporation of Exogenous Fatty Acids into Rat Adipose Glycerides

Lhuillery, Claude; Mebarki, Slimane; Lecourtier, Marie-José; Demarne, Y.

doi:10.1093/jn/118.12.1447

Cited by 22 publications

(16 citation statements)

References 36 publications

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“…In contrast, longer FA were incorporated more efficiently than 10:0 and 12:0 in the rat [44]. According to Lin et al [46], MUFA and PUFA accumulated more efficiently than SFA in the rabbit and the data from the wild raccoon dog support these findings.…”

Section: Selective Incorporation Of Fa Into the Sc Adipose Tissuementioning

confidence: 84%

“…The steps of FA accumulation have been previously investigated in laboratory animals and humans [36,[41][42][43][44][45][46][47][48] but rarely in seasonal mammals. In the captive alpine marmot (Marmota marmota) the FA composition of the sc and gonadal WAT did not change in spite of hibernation and the subsequent refeeding period with fat accumulation [49].…”

Section: Selective Incorporation Of Fa Into the Sc Adipose Tissuementioning

confidence: 99%

“…It is known that while FA deposition depends on the composition of dietary FA, selectivity will influence the eventual profile of deposited FA in WAT [43,44,[46][47][48]. Moreover, the in vivo accumulation of particular n-3 PUFA is inversely related to their in vitro mobilization in the rat [36].…”

Section: Selective Incorporation Of Fa Into the Sc Adipose Tissuementioning

confidence: 99%

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Selective Seasonal Fatty Acid Accumulation and Mobilization in the Wild Raccoon Dog (Nyctereutes procyonoides)

Mustonen

Asikainen

Aho

et al. 2007

Lipids

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Previous studies on laboratory rodents, rabbits and humans have demonstrated that fatty acid (FA) mobilization from white adipose tissue (WAT) is selective and its efficiency is related to FA structure. Selective FA mobilization was also documented in a carnivore, the farmed raccoon dog (Nyctereutes procyonoides), fasted for 8 weeks. The present study explored whether similar selectivity of FA mobilization was manifested in wild mammals experiencing seasonal food scarcity and abundance. Fractional mobilization from and incorporation into WAT of a wide spectrum of FA were studied by gas-liquid chromatography from the subcutaneous WAT of free-ranging raccoon dogs with the same individuals sampled in consecutive seasons. The wintertime FA mobilization was selective and mostly confirmed the patterns of FA release in captivity. Mobilization correlated inversely with the FA chain length but increased with unsaturation and when the first double bond was located closer to the methyl end. 18-20 C n-3 polyunsaturated FA (PUFA) and 14-17 C monounsaturated FA (MUFA) were preferentially mobilized while 19-24 C saturated FA and MUFA were preserved during wintering. The summertime FA incorporation correlated inversely with the chain length and increased with unsaturation and in MUFA and PUFA with double bonds closer to the methyl end. The principles of selective FA mobilization were valid in wild mammals. FA incorporation was also selective and reversed the wintertime losses of the preferably mobilized FA.

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Section: Selective Incorporation Of Fa Into the Sc Adipose Tissuementioning

confidence: 84%

Section: Selective Incorporation Of Fa Into the Sc Adipose Tissuementioning

confidence: 99%

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Selective Seasonal Fatty Acid Accumulation and Mobilization in the Wild Raccoon Dog (Nyctereutes procyonoides)

Mustonen

Asikainen

Aho

et al. 2007

Lipids

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“…Marine ecosystems contain a diverse array of FAs (Ackman 1980), which are consumed and deposited in a predator's adipose tissues with little or no modification (Ackman & Eaton 1966, Cook 1991 or in a predictable way (Lhuillery et al 1988, Summers et al 2000, Cooper 2004. Predator FA profiles are also influenced by the biosynthesis of certain FAs and the reduced deposition of others.…”

Section: Introductionmentioning

confidence: 99%

Blubber fatty acid profiles reveal regional, seasonal, age-class and sex differences in the diet of young Steller sea lions in Alaska

Beck¹,

Rea²,

Iverson³

et al. 2007

Mar. Ecol. Prog. Ser.

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Blubber fatty acid (FA) profiles of young Steller sea lions Eumetopias jubatus (< 24 mo old; n = 477) were investigated to determine whether regional, seasonal, age-class and sex differences occur in the diets of these demographic groups. Blubber FA profiles of spring (March to May) pups differed significantly by region, probably reflecting regional differences in the diet of adult females, who provide their pups with milk. While there were statistically significant seasonal and age-class differences in both Prince William Sound (PWS) and SE Alaska (SEA), differences in FA profiles between sexes were only evident in the blubber of yearlings from PWS. Within SEA, blubber FA profiles of summer pups differed significantly from all other seasonal/age-class groups in that region. This is consistent with movements of female-pup pairs from rookeries to haul-outs and hence differences in female foraging. In SEA, seasonal differences in blubber FA composition were evident and similar between yearlings and pups. In contrast, there was a gradual change in the FA profile of pup blubber from summer to spring in PWS, which did not follow the same seasonal pattern of yearling profiles. These differences in FA profiles suggest either differences in the timing of weaning between the 2 areas or shifts in the diets of lactating females, or both. KEY WORDS: Fatty acids · Dietary intake · Eumetopias jubatus · Independent foragingResale or republication not permitted without written consent of the publisher

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“…The essential PUFAs, linoleic acid (18:2 n-6) and α-linolenic acid (18:3 n-3), can only be obtained through the diet, thus the presence of these lipids in WAT is essentially a reflection of the dietary lipid composition (Lhuillery et al 1988;Becker 1989). Black-tailed prairie dogs might be unable to obtain sufficient amounts of n-6 PUFAs in their diet, a factor that could prevent this species from engaging in the prolonged and continuous torpor characteristic of hibernation.…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in lipids, diet, and body composition of free-ranging black-tailed prairie dogs (<i>Cynomys ludovicianus</i>)

Lehmer¹,

Horne²

2001

Can. J. Zool.

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Black-tailed prairie dogs (Cynomys ludovicianus) enter torpor intermittently during winter in the field but do not hibernate continuously from fall to spring. Previous studies have established that hibernators rely primarily on stored lipids during winter and that the storage of n-6 PUFAs in white adipose tissue (WAT) is required to maintain low body temperatures during this continuous torpor. Adult (>1 year) black-tailed prairie dogs were livetrapped in the fall, winter, spring, and summer (n = 10-12). To determine whether free-ranging black-tailed prairie dogs rely heavily on stored proteins during winter, we investigated seasonal changes in body composition of the prairie dogs with dualenergy X-ray absorptiometry scans. We also examined seasonal changes in lipid composition of the WAT and diet using gas-liquid chromatography to determine whether black-tailed prairie dogs lack the lipids necessary for hibernation. Seasonal changes in fat, lean, and total body mass indicate that black-tailed prairie dogs relied heavily on stored lipids during the winter and appeared to rely on proteins primarily during periods that coincided with reproductive activity. Seasonal changes in dietary and WAT lipids indicate that WAT n-6 PUFAs are used during winter and stored during summer, while WAT n-3 PUFAs are stored during winter and used during summer. These patterns of lipid use are different than those reported in free-ranging hibernators and may explain why black-tailed prairie dogs experience shallow and infrequent torpor bouts.Résumé : Les Chiens-de-prairie à queue noire (Cynomys ludovicianus) entrent en torpeur par intermittence durant l'hiver en nature, mais ils n'hibernent pas de façon continue de l'automne au printemps. Des études antérieures ont démontré que l'hibernation dépend surtout des réserves de lipides durant l'hiver et que le stockage d'acides gras polyinsaturés n-6 (n-6 PUFAs) dans le tissu adipeux blanc (WAT) est nécessaire au maintien de températures basses durant cette période continue de torpeur. Des Chiens-de-prairie à queue noire adultes (>1 an) ont été piégés vivants à l'automne, en hiver, au printemps et en été (n = 10-12). Pour déterminer si les Chiens-de-prairie à queue noire libres en nature dépendent fortement de leurs réserves de protéines en hiver, nous avons suivi les changements saisonniers de leur composition corporelle au moyen d'images obtenues par absorptiométrie biphotonique à rayons X. Nous avons également suivi les changements saisonniers du contenu lipidique des tissus WAT et du régime alimentaire par chromatographie gaz-liquide dans le but de déterminer si les Chiens-de-prairie à queue noire ont suffisamment de lipides pour assurer leur hibernation. Les changements saisonniers de la masse des graisses, de la masse totale sans les graisses et de la masse totale indiquent que les Chiens-de-prairie à queue noire dépendent fortement de leurs réserves lipidiques durant l'hiver et semblent utiliser leurs protéines surtout au cours des périodes qui coïncident avec l'activité reproductrice....

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Influence of Different Dietary Fats on the Incorporation of Exogenous Fatty Acids into Rat Adipose Glycerides

Cited by 22 publications

References 36 publications

Selective Seasonal Fatty Acid Accumulation and Mobilization in the Wild Raccoon Dog (Nyctereutes procyonoides)

Selective Seasonal Fatty Acid Accumulation and Mobilization in the Wild Raccoon Dog (Nyctereutes procyonoides)

Blubber fatty acid profiles reveal regional, seasonal, age-class and sex differences in the diet of young Steller sea lions in Alaska

Seasonal changes in lipids, diet, and body composition of free-ranging black-tailed prairie dogs (<i>Cynomys ludovicianus</i>)

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