Cited by 415Liver Disease Diagnosis and TreatmentFatty Acid Research and HealthPeroxisome Proliferator-Activated Receptors

Polyunsaturated fatty acids ameliorate hepatic steatosis in obese mice by SREBP-1 suppression

Sekiya, Motohiro, Yahagi, Naoya, Matsuzaka, Takashi, Najima, Yuho, Nakakuki, Masanori, Nagai, Ryozo, Ishibashi, Shun, Osuga, Jun-ichi +2 more·2003·Hepatology

Abstract

Leptin-deficient ob/ob mice show many characteristics of obesity, including excess peripheral adiposity as well as severe hepatic steatosis, at least in part, due to increased hepatic lipogenesis. Polyunsaturated fatty acids (PUFAs) are not only ligands for peroxisome proliferator-activated receptor (PPAR) alpha but are also negative regulators of hepatic lipogenesis, which is thought to be mediated by the repression of sterol regulatory element-binding protein (SREBP)-1. We have previously shown that the disruption of SREBP-1 in ob/ob mice decreased their liver triglyceride storage. To examine whether PUFAs could reduce hepatic triglyceride deposition, we challenged ob/ob mice with dietary PUFA. It is demonstrated that PUFA markedly decreased the mature form of SREBP-1 protein and thereby reduced the expression of lipogenic genes such as fatty acid synthase (FAS) and stearoyl-CoA desaturase 1 (SCD1) in the livers of ob/ob mice. Consequently, the liver triglyceride content and plasma alanine aminotransferase (ALT) levels were decreased. Furthermore, both hyperglycemia and hyperinsulinemia in ob/ob mice were improved by PUFA administration, similar to the effect of PPARalpha activators. In conclusion, PUFAs ameliorate obesity-associated symptoms, such as hepatic steatosis and insulin resistance, presumably through both down-regulation of SREBP-1 and activation of PPARalpha.

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Crossref · 10.1016/j.hep.2003.09.028

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Authors
Sekiya, M., Yahagi, N., Matsuzaka, T., Najima, Y., Nakakuki, M., Nagai, R., Ishibashi, S., Osuga, J.-I., Yamada, N., & Shimano, H.
Affiliations
  • The University of Tokyo (JP)
  • University of Tsukuba (JP)
Corresponding author
Shimano, Hitoshi
Venue
Hepatology
Published
2003-12
Volume
38
Issue
6
Pages
1529-1539
ISSN
0270-9139 (ISSN-L)
OpenAlex
W2079378050
Cited by
415
References
39
Citations by year
2026: 2 · 2025: 4 · 2024: 12 · 2023: 21 · 2022: 12 · 2021: 17 · 2020: 24 · 2019: 12 · 2018: 16 · 2017: 21 · 2016: 23 · 2015: 25 · 2014: 19 · 2013: 34 · 2012: 17
FWCI
9.29
Type
journal article
Language
en
Open access
closed
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
polyunsaturated fatty acids, hepatic steatosis, SREBP1, PPARα, leptin-deficient ob/ob mice, hepatic lipogenesis, fatty acid synthase, stearoyl-CoA desaturase 1, insulin resistance, hyperinsulinemia, hyperglycemia, obesity
MeSH terms
Alanine Transaminase, Animals, Cholesterol, DNA-Binding Proteins, Fatty Acids, Unsaturated, Fatty Liver, Gene Expression Regulation, Insulin Resistance, Liver, Mice, Inbred C57BL, Mice, Obese, Transcription Factors, Triglycerides, Receptors, Cytoplasmic and Nuclear, CCAAT-Enhancer-Binding Proteins, Mice, Sterol Regulatory Element Binding Protein 1

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