Lipid class and fatty acid composition of phospholipids from the gonads of skipjack tuna

Hiratsuka, Seiichi; Kitagawa, Tomoko; Matsue, Yoko; Hashidume, Masayuki

doi:10.1111/j.1444-2906.2004.00885.x

Cited by 27 publications

(23 citation statements)

References 14 publications

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“…Almost all DHA levels in the PL (PE and PC) in the S. australasicus lipids exceeded 20% of TFA, similar to other fish species including tuna species (1,44,45).…”

Section: Resultssupporting

confidence: 72%

“…It is well known that high levels of n-3 PUFA are generally found in the tissue PL of all marine fish species (1,44,45) because polar tissue PL work as cell membrane lipids and are generally rich in n-3 PUFA for membrane fluidity. Almost all DHA levels in the PL (PE and PC) in the S. australasicus lipids exceeded 20% of TFA, similar to other fish species including tuna species (1,44,45).…”

Section: Resultsmentioning

confidence: 99%

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Docosahexaenoic acid levels in the lipids of spotted mackerel Scomber australasicus

Osako

Saito

Hossain

et al. 2006

Lipids

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The lipid and FA compositions of various organs and of the stomach contents of Scomber australasicus were analyzed. DHA was characteristically the major FA of all the major lipid classes of all organs except for liver TAG. The mean DHA contents of the various organs accounted for more than 17% of the total FA (TFA), whereas those in the stomach contents, originating from the prey, fluctuated and were generally low. In particular, the DHA levels in the TAG from all organs of S. australasicus accounted for up to 17% of TFA, even though it is a neutral depot lipid. S. australasicus contained markedly high levels of DHA, even though it is a small-sized Scombridae species, and its high levels of DHA were close to those in large-sized highly migratory tuna species. Furthermore, DHA levels in its muscle TAG were consistently high, compared with those in the visceral TAG, which might be directly influenced by the prey lipids. These phenomena suggest that long-distance migration has a close relationship with high accumulation of DHA in fish tissues, since S. australasicus is reported to migrate in offshore water, similar to highly migratory tuna species. Additionally, the physiological selective accumulation of DHA in the muscle during migration is caused by in vivo metabolism of FA in the vascular system, suggesting that DHA is poorly used as a source of migration energy, though it is provided abundantly through the prey lipids.

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“…Almost all DHA levels in the PL (PE and PC) in the S. australasicus lipids exceeded 20% of TFA, similar to other fish species including tuna species (1,44,45).…”

Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Docosahexaenoic acid levels in the lipids of spotted mackerel Scomber australasicus

Osako

Saito

Hossain

et al. 2006

Lipids

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“…Furthermore, the present study also showed that, independent of dietary DHA supply, DHA in muscle tissues fluctuated during the lifecycle of Arctic charr, which suggests that DHA metabolism in Arctic charr may change with extrinsic factors, such as water temperature (Farkas et al, 1980), as well as intrinsic factors, such as gonadal development (Hiratsuka et al, 2004). This long-term study has thus provided better resolution of DHA retention in tissues over time compared to shorter feeding studies that can miss seasonal…”

Section: Discussionsupporting

confidence: 61%

Docosahexaenoic acid in Arctic charr (Salvelinus alpinus): The importance of dietary supply and physiological response during the entire growth period

Murray

Hager

Tocher

et al. 2015

Comparative Biochemistry and Physiology Part B: Biochemistry an

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The aim of this 14-month feeding study was to investigate the effects of dietary docosahexaenoic acid (DHA) on tissue fatty acid composition, DHA retention and DHA content per biomass accrual in muscle tissues of Arctic charr (Salvelinus alpinus). A control feed, formulated with a relatively high DHA inclusion level (F1), was compared with feeds containing gradually reduced amounts of DHA (Feeds F2, F3, and F4). Arctic charr were randomly distributed among 12 tanks and fed one of the feeds in triplicate. The DHA content within muscle tissues of fish fed diets F1 and F2 was generally higher compared to fish fed diets F3 and F4. However, there was an interaction between dietary DHA treatment and season, which resulted in fish muscle tissues having similar DHA contents irrespective of dietary supply during specific sampling periods. Although diets F3and F4 contained ~4-fold less DHA compared to diets F1 and F2, retention of DHA in dorsal and ventral muscle tissue was up to 5-fold higher relative to the diet content in fish fed diets F3 and F4. However, the difference among treatments was dependent on the month sampled. In addition, younger fish retained DHA more efficiently compared to older fish. DHA (µg DHA/g/day) accrual in muscle tissue was independent of somatic growth, and there was no difference among treatments. The results suggested that dietary DHA may be essential throughout the lifecycle of Arctic charr and that the DHA content of muscle tissues was influenced by diet and metabolic/physiological factors, such as specific DHA retention during the entire growth cycle . Finally, this long-term feeding study in Arctic charr indicated a non-linear function in DHA retention in dorsal and ventral muscle tissues throughout the lifecycle, which varied in its relationship to dietary DHA.

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“…Each band was detected under saturated iodine gas, and scraped off from the PE and PC band on the plate. The separated PE and PC were converted to fatty acid methyl ester (FAME, from diacyl type) and dimethylacetal (DMA, from plasmalogen type) by direct transesterification with methanol containing 1% concentrated hydrochloric acid for 2.5 h at 85˚C as previously described ( 18 ). The FAME and DMA were separated by gas chromatography using a flame ionization detector (GC-14A; Shimadzu Corporation, Kyoto, Japan).…”

Section: Methodsmentioning

confidence: 99%

Effects of Dietary Docosahexaenoic Acid Connecting Phospholipids on the Learning Ability and Fatty Acid Composition of the Brain

Hiratsuka

Koizumi

Ooba³

et al. 2009

J Nutr Sci Vitaminol

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SummaryThe effects of dietary docosahexaenoic acid (DHA, C22:6 n -3) connecting phospholipids on the learning ability and fatty acid composition of the brain were investigated in hypercholesterolemic mice. ICR mice were subjected to a very low level of n -3 fatty acids through two generations. At 4 wk of age, the F 1 generation, n -3 fatty acid deficient male mice were provided with an experimental diet containing four kinds of lipids (safflower oil: Saf, DHA connecting triacylglycerols: DHA-TG, DHA connecting phospholipids: DHA-PL, soybean phospholipids: Soy-PL) for 5 wk. Another group of ICR mice were obtained and fed a commercial diet (CE-2, CLEA Japan, Inc.) as a control. The learning and memory abilities of the mice were evaluated by the modified avoidance procedure. The learning and memory ability level was significantly higher in mice fed the DHA-PL diet than in those fed the Saf and Soy-PL diets, and was the same level as the control. The DHA levels of phosphatidylethanolamine in the brain were significantly higher in the mice fed the two types of DHA-containing diets than in those fed the Saf and Soy-PL diets and was not significantly different between DHA-TG and DHA-PL. The dimethylacetal levels in the brain were significantly higher in the mice fed the DHA-PL diet than in those fed the Saf and DHA-TG diets. These results suggest that the dietary DHA connecting phospholipids have the effect of improving memory learning, and may be related to the both the DHA and plasmalogen levels in the brain.

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Lipid class and fatty acid composition of phospholipids from the gonads of skipjack tuna

Cited by 27 publications

References 14 publications

Docosahexaenoic acid levels in the lipids of spotted mackerel Scomber australasicus

Docosahexaenoic acid levels in the lipids of spotted mackerel Scomber australasicus

Docosahexaenoic acid in Arctic charr (Salvelinus alpinus): The importance of dietary supply and physiological response during the entire growth period

Effects of Dietary Docosahexaenoic Acid Connecting Phospholipids on the Learning Ability and Fatty Acid Composition of the Brain

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