Effect of Erabu Sea Snake (Laticauda semifasciata) Lipids on the Swimming Endurance of Aged Mice

Shirai, Nobuyuki; Higuchi, Tomoyuki; Suzuki, Haruo; Shimizu, Eiji

doi:10.3177/jnsv.53.476

Cited by 7 publications

(6 citation statements)

References 38 publications

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“…Dietary safflower oil did not significantly affect body or adipose tissue weight, suggesting that the improved endurance was a primary effect of diet and not a secondary effect of buoyancy differences because of body fat. Furthermore, fish oil and lard diets negatively affect endurance of aged mice, as observed in our previous study [2]. …”

Section: Discussionmentioning

confidence: 72%

“…Individual mice were identified by ear punches. At baseline, the mice had similar body weights and swimming time to exhaustion, as measured by the forced swimming system described in our previous studies [1,2,3,22,23]. The mice were then fed the experimental diets for 12 weeks, and the swimming times were reassessed using the same system.…”

Section: Methodsmentioning

confidence: 99%

“…Increasing evidence suggests that different types of dietary lipids (such as safflower oil, sea-snake oil, conjugated linoleic acid, and medium-chain triglycerides) have varying effects on endurance [1,2,3,4,5,6]. Our previous studies [1,2,3] indicated that n–3 polyunsaturated fatty acids (PUFAs) do not actively improve endurance in mice. This finding has been supported by human studies in which supplementation with n–3 PUFA-rich fish oil failed to increase performance in endurance athletes [7] and well-trained soccer players [8].…”

Section: Introductionmentioning

confidence: 99%

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Relationship between the Effect of Dietary Fat on Swimming Endurance and Energy Metabolism in Aged Mice

Shirai¹,

Suzuki²

2011

Ann Nutr Metab

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Aim: The aim of this study was to investigate the effect of different dietary fats on alterations in endurance, energy metabolism, and plasma levels of interleukin-6 (IL-6) and minerals in mice. Method: Male mice (aged 58 weeks) were fed diets containing 6% safflower oil, fish oil, or lard for 12 weeks. Swimming time to exhaustion, energy metabolism, and plasma IL-6 levels were subsequently determined. Results: Mice fed safflower oil exhibited a marked increase in swimming time compared to the baseline level. Mice fed lard exhibited a significant decrease in swimming time, while mice on a fish oil diet exhibited a small decrease in swimming time. The final swimming time of mice fed safflower oil was significantly longer than that of animals fed lard. This improvement in endurance with dietary safflower oil was accompanied by decreased accumulation of lactate and less glycogen depletion during swimming. In the safflower oil group, muscle carnitine palmitoyltransferase activity increased significantly after swimming, while the plasma non-esterified fatty acid concentration decreased significantly. A trend to increased plasma IL-6 levels was observed in sedentary animals on a safflower oil diet compared to those on a lard diet. Conclusions: These results suggest that dietary safflower oil improves the swimming endurance of aged mice to a greater extent than lard, and that this effect appears to involve glycogen sparing through increased fatty acid utilization.

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Section: Discussionmentioning

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relationship between the Effect of Dietary Fat on Swimming Endurance and Energy Metabolism in Aged Mice

Shirai¹,

Suzuki²

2011

Ann Nutr Metab

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“…By way of comparison, glucose was also set at the same dose. At the end of 16 weeks of feeding, the mice fed lard, fish oil and sea snake lipid diets were injected intraperitoneally with physiological saline (PSI) at a dose of 1 mL/100 g body weight, and the swimming times of mice attached with 1% loads corresponding to their body weights, were determined at 30 min after injection in a forced swimming system which has been described in our previous studies (Zhang et al, 2007a(Zhang et al, , b, 2009a. Briefly, the swimming times to exhaustion of mice with 1% loads attached to their tails were determined in an acrylic plastic tank (26 × 22 × 29 cm) filled with water to a depth of 25 cm at a temperature of 23℃.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dietary Lipid Type on the Enhancement of Swimming Endurance of Mice by L-Lactic Acid

Shirai

Suzuki

Shimizu

2010

FSTR

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Mice fed either a diet containing 6% lard, fish oil or Erabu sea snake lipids for 16 weeks were intraperitoneally injected L-lactic acid or glucose (25 mg/kg) following injection of physiological saline and subjected to swimming tests at 30 min after each injection. The swimming time ratio of lactic acid to saline injections was greater in mice fed sea snake lipids than those fed lard (p < 0.01) or fish oil (p < 0.05), and significantly greater than that of glucose to saline injections only in mice fed sea snake lipids (p < 0.01) but not those fed lard or fish oil. Increased endurance by injected glucose was not observed in mice fed any of the diets. These results indicate that dietary lipid type affects the endurance of mice injected with L-lactic acid, and Erabu sea snake lipids may contain factors that regulate lactic acid metabolism effectively.

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“…Erabu sea snake lipid intake was found to promote the decrease in levels of plasma and hepatic lipids and plasma glucose, the improvement of learning ability and the enhancement of swimming endurance of mice (Shirai et al. 2002b, 2004, 2006; Zhang et al. 2007).…”

Section: Introductionmentioning

confidence: 99%

CHANGES IN LEVELS OF PLASMA TOTAL CHOLESTEROL, TRIACYLGLYCEROL AND PHOSPHOLIPID IN MICE FED ERABU SEA SNAKE (LATICAUDA SEMIFASCIATA) LIPIDS DIET

Higuchi

Shirai

Suzuki

et al. 2008

Journal of Food Lipids

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The effects of dietary Erabu sea snake lipids on changes in plasma total cholesterol, triacylglycerol, and phospholipid levels of male Crlj : CD‐1 (ICR) mice was evaluated. Mice were fed three different experimental diets containing 6% lard, 6% Erabu sea snake lipid and 6% fish oil, respectively. Total cholesterol, triacylglycerol and phospholipid levels in plasma collected at weeks 0, 4, 8, 12 and 16 were measured. Levels of plasma total cholesterol and phospholipids in the sea snake dietary group were significantly reduced at weeks 8‐16 from the start of the trial, and plasma triacylglycerol was significantly reduced at week 16, while those in the lard dietary group remained unchanged and/or increased during the period of feeding trial. Plasma total cholesterol and triacylglycerol levels were significantly lower in sea snake lipids as well as fish oil dietary groups than in the lard dietary group at weeks 4–16. The results suggest that Erabu sea snake lipids rapidly induce reduction of plasma lipid levels at week 4 and reduction of plasma lipids and glucose in mice fed the sea snake lipids diet was influenced by the presence of n‐3 polyunsaturated fatty acids in the feed. PRACTICAL APPLICATIONS Erabu sea snake lipids have large amounts of n‐3 polyunsaturated fatty acids, and a lowering‐effect on levels of plasma and hepatic total cholesterol, triacylglycerol, phospholipid and plasma glucose in mice similar to fish oil. The sea snake lipids may serve as a beneficial food with regard to lipid and glucose metabolism.

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Effect of Erabu Sea Snake (Laticauda semifasciata) Lipids on the Swimming Endurance of Aged Mice

Cited by 7 publications

References 38 publications

Relationship between the Effect of Dietary Fat on Swimming Endurance and Energy Metabolism in Aged Mice

Relationship between the Effect of Dietary Fat on Swimming Endurance and Energy Metabolism in Aged Mice

Effect of Dietary Lipid Type on the Enhancement of Swimming Endurance of Mice by L-Lactic Acid

CHANGES IN LEVELS OF PLASMA TOTAL CHOLESTEROL, TRIACYLGLYCEROL AND PHOSPHOLIPID IN MICE FED ERABU SEA SNAKE (LATICAUDA SEMIFASCIATA) LIPIDS DIET

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