Cited by 175Fatty Acid Research and HealthAdipose Tissue and MetabolismLipid metabolism and biosynthesis

Dietary n-3 fatty acids affect mRNA level of brown adipose tissue uncoupling protein 1, and white adipose tissue leptin and glucose transporter 4 in the rat

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Takahashi, Yoko, Ide, Takashi·2000·British Journal of Nutrition

Abstract

We examined the effect of dietary fats rich inn-3 polyunsaturated fatty acids (PUFA) on mRNA levels in white and brown adipose tissues in rats. Four groups of rats were fed on a low-fat diet (20 g safflower oil/kg) or a high-fat diet (200 g/kg) containing safflower oil, which is rich inn-6 PUFA (linoleic acid), or perilla (α-linolenic acid) or fish oil (eicosapentaenoic and docosahexaenoic acids), both of which are rich inn-3 PUFA, for 21 d. Energy intake was higher in rats fed on a high-safflower-oil diet than in those fed on low-fat or high-fish-oil diet, but no other significant differences were detected among the groups. Perirenal white adipose tissue weight was higher and epididymal white adipose tissue weight tended to be higher in rats fed on a high-safflower-oil diet than in those fed on a low-fat diet. However, high-fat diets rich inn-3 PUFA, compared to a low-fat diet, did not increase the white adipose tissue mass. High-fat diets relative to a low-fat diet increased brown adipose tissue uncoupling protein 1 mRNA level. The increases were greater with fats rich inn-3 PUFA than withn-6 PUFA. A high-safflower-oil diet, compared to a low-fat diet, doubled the leptin mRNA level in white adipose tissue. However, high-fat diets rich inn-3 PUFA failed to increase it. Compared to a low-fat diet, high-fat diets down-regulated the glucose transporter 4 mRNA level in white adipose tissue. However, the decreases were attenuated with high-fat diets rich inn-3 PUFA. It is suggested that the alterations in gene expression in adipose tissue contribute to the physiological activities ofn-3 PUFA in preventing body fat accumulation and in regulating glucose metabolism in rats.

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  • PUFAs such as EPA and DHA stimulate UCP1 expression and adaptive non-shivering or diet-induced thermogenesis in brown adipocytes, as well as browning of WAT in C57BL/6 mice, Sprague-Dawley rats, and overweight humans.

    “PUFAs such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) also stimulate UCP1 expression and thus adaptive non-shivering or diet-induced thermogenesis in brown adipocytes, as well as the browning of the white adipose tissue (WAT) in C57BL/6 mice [67,68], Sprague-Dawley rats [69,70], and overweight humans [71].”

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  1. Snedecor GW & Cochran WG (1989) Statistical Methods, 8th ed. Ames, IA: Iowa State University Press.

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Authors
Takahashi, Y., & Ide, T.
Affiliations
Ministry of Agriculture, Forestry and Fisheries (JP)
Corresponding author
Ide, Takashi
Venue
British Journal of Nutrition
Published
2000-08
Volume
84
Issue
2
Pages
175-184
ISSN
  • 0007-1145 (ISSN-L)
  • 1475-2662
OpenAlex
W2166122956
Cited by
175
References
50
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 4 · 2022: 6 · 2021: 6 · 2020: 9 · 2019: 11 · 2018: 8 · 2017: 9 · 2016: 7 · 2015: 6 · 2014: 6 · 2013: 10 · 2012: 7
FWCI
7.99
Type
journal article
Language
en
Open access
Locations
British Journal Of Nutrition (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
omega-3 fatty acids, brown adipose tissue, white adipose tissue, UCP1, leptin, glucose transporter 4, perilla oil, fish oil, safflower oil, dietary fat, adipose tissue gene expression, body fat accumulation, glucose metabolism, energy intake

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