Cited by 29Lipid metabolism and biosynthesisAdipose Tissue and MetabolismPeroxisome Proliferator-Activated Receptors

Biosynthetic regulation of monobutyrin, an adipocyte-secreted lipid with angiogenic activity

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Wilkison, W.O., Choy, L., Spiegelman, B.M.·1991·Journal of Biological Chemistry

Abstract

1-Butyrylglycerol (monobutyrin) is a novel angiogenic compound that is synthesized and secreted during the differentiation of 3T3-F442A preadipocytes into adipocytes. To study the regulation of monobutyrin biosynthesis we have developed an assay utilizing the lgycerol kinase enzyme from Cellulomonas to quantitate the levels of this compound in cell-conditioned medium. Analysis of several cultured cell types, including tumor cell lines, indicated that monobutyrin production is detectable only from adipocytes, reaching a steady-state concentration of approximately 1.0 microM in conditioned medium. Monobutyrin synthesis was demonstrated in vitro using [14C]butyryl-CoA with total homogenate or particulate fractions from adipocytes. Similar fractions from non-adipocyte cell lines failed to synthesize monobutyrin. This biosynthetic activity was shown to be distinct by substrate competition studies from the microsomal sn-glycerol-3-phosphate acyltransferase, whose activity is known to increase during adipocyte differentiation. The production of monobutyrin was hormonally regulated, as the addition of epinephrine to adipocytes caused a 10-fold increase in the amount of monobutyrin secreted. These results indicate that monobutyrin synthesis is adipocyte specific, occurs through an apparently novel particulate enzyme system, and is regulated in a hormone-dependent manner. The implications of these results for adipose physiology and angiogenesis are discussed.

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Crossref · 10.1016/s0021-9258(18)55385-0

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Authors
Wilkison, W. O., Choy, L., & Spiegelman, B. M.
Affiliations
Dana-Farber Cancer Institute (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1991-09
Volume
266
Issue
25
Pages
16886-16891
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1585894269
Cited by
29
References
38
Citations by year
2024: 3 · 2022: 1 · 2017: 2 · 2016: 1 · 2014: 1 · 2012: 2
FWCI
0.67
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk042420-09, 5f32dk008277-03)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK08277, DK42420)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
adipogenesis, angiogenesis, glycerol kinase, Cellulomonas, sn-glycerol-3-phosphate acyltransferase, adipose tissue physiology, 3T3-F442A preadipocytes
MeSH terms
Adipose Tissue, Alprostadil, Animals, Cell Differentiation, Cell Line, Epinephrine, Glycerides, Glycerol Kinase, Kinetics, Organ Specificity, Phosphorylation, Angiogenesis Inducing Agents, Mice

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