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Cited by 270

The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.

Liporegulation in Diet-induced Obesity

Open access
Lee, Young, Wang, May-Yun, Kakuma, Tetsuya, Wang, Zhuo-Wei, Babcock, Evelyn, McCorkle, Kay, Higa, Moritake, Zhou, Yan-Ting, Unger, Roger H.·2001·Journal of Biological Chemistry

Abstract

To test the hypothesis that the physiologic liporegulatory role of hyperleptinemia is to prevent steatosis during caloric excess, we induced obesity by feeding normal Harlan Sprague-Dawley rats a 60% fat diet. Hyperleptinemia began within 24 h and increased progressively to 26 ng/ml after 10 weeks, correlating with an approximately 150-fold increase in body fat (r = 0.91, p < 0.0001). During this time, the triacylglycerol (TG) content of nonadipose tissues rose only 1-2.7-fold implying antisteatotic activity. In rodents without leptin action (fa/fa rats and ob/ob and db/db mice) receiving a 6% fat diet, nonadipose tissue TG was 4-100 times normal. In normal rats on a 60% fat diet, peroxisome proliferator-activated receptor alpha protein and liver-carnitine palmitoyltransferase-1 (l-CPT-1) mRNA increased in liver. In their pancreatic islets, fatty-acid oxidation increased 30% without detectable increase in the expression of peroxisome proliferator-activated receptor-alpha or oxidative enzymes, whereas lipogenesis from [14C]glucose was slightly below that of the 4% fat-fed rats (p < 0.05). Tissue-specific overexpression of wild-type leptin receptors in the livers of fa/fa rats, in which marked steatosis is uniformly present, reduced TG accumulation in liver but nowhere else. We conclude that a physiologic role of the hyperleptinemia of caloric excess is to protect nonadipocytes from steatosis and lipotoxicity by preventing the up-regulation of lipogenesis and increasing fatty-acid oxidation.

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Metadata

Authors
Lee, Y., Wang, M.-Y., Kakuma, T., Wang, Z.-W., Babcock, E., McCorkle, K., Higa, M., Zhou, Y.-T., & Unger, R. H.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2001-02
Volume
276
Issue
8
Pages
5629-5635
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2079139791
Cited by
270
References
5
FWCI
7.14
Type
journal article
Language
en
Open access
hybrid

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