Nutr Res Pract.  2013 Oct;7(5):352-358. 10.4162/nrp.2013.7.5.352.

Impact of Korean pine nut oil on weight gain and immune responses in high-fat diet-induced obese mice

Affiliations
  • 1Department of Food and Nutrition, College of Human Ecology, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea. snhan@snu.ac.kr
  • 2Research Institute of Human Ecology, Seoul National University, Seoul 151-742, Korea.

Abstract

Korean pine nut oil (PNO) has been reported to have favorable effects on lipid metabolism and appetite control. We investigated whether PNO consumption could influence weight gain, and whether the PNO-induced effect would result in an improvement of immune function in high-fat diet (HFD)-induced obese mice. C57BL/6 mice were fed control diets with 10% energy fat from either PNO or soybean oil (SBO), or HFDs with 45% energy fat from 10% PNO or SBO and 35% lard, 20% PNO or SBO and 25% lard, or 30% PNO or SBO and 15% lard for 12 weeks. The proliferative responses of splenocytes upon stimulation with concanavalin A (Con A) or lipopolysaccharide (LPS), Con A-stimulated production of interleukin (IL)-2 and interferon (IFN)-gamma, and LPS-stimulated production of IL-6, IL-1beta, and prostaglandin E2 (PGE2) by splenocytes were determined. Consumption of HFDs containing PNO resulted in significantly less weight gain (17% less, P < 0.001), and lower weight gain was mainly due to less white adipose tissue (18% less, P = 0.001). The reduction in weight gain did not result in the overall enhancement in splenocyte proliferation. Overall, PNO consumption resulted in a higher production of IL-1beta (P = 0.04). Replacement of SBO with PNO had no effect on the production of IL-2, IFN-gamma, IL-6, or PGE2 in mice fed with either the control diets or HFDs. In conclusion, consumption of PNO reduced weight gain in mice fed with HFD, but this effect did not result in the overall improvement in immune responses.

Keyword

Pine nut oil; obesity; high-fat diet; immune response; inflammatory cytokine

MeSH Terms

Adipose Tissue, White
Animals
Appetite
Concanavalin A
Diet
Diet, High-Fat
Dietary Fats
Dinoprostone
Interferons
Interleukin-2
Interleukin-6
Interleukins
Lipid Metabolism
Mice
Mice, Obese
Nuts
Obesity
Soybean Oil
Weight Gain
Concanavalin A
Dietary Fats
Dinoprostone
Interferons
Interleukin-2
Interleukin-6
Interleukins
Soybean Oil

Figure

  • Fig. 1 Serum leptin levels of mice fed with control diets or HFDs containing PNO or SBO (SC, n = 10; PC, n = 11; S10, n = 11; P10, n = 11; S20, n = 11; P20, n = 10; S30, n = 12; P30, n = 12). Values are presented as the mean ± SE. A two-way ANOVA was used to determine the effects of fat amount and type, followed by an LSD post-hoc test. Labeled means without a common letter represent significant differences (P < 0.05). Serum leptin levels were determined by ELISA.


Cited by  1 articles

Korean pine nut oil replacement decreases intestinal lipid uptake while improves hepatic lipid metabolism in mice
Shuang Zhu, Soyoung Park, Yeseo Lim, Sunhye Shin, Sung Nim Han
Nutr Res Pract. 2016;10(5):477-486.    doi: 10.4162/nrp.2016.10.5.477.


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