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Attainment of brown...
Attainment of brown adipocyte features in white adipocytes of hormone-sensitive lipase null mice.
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- Ström, Kristoffer (author)
- Lund University,Lunds universitet,Molekylär endokrinologi,Forskargrupper vid Lunds universitet,Genomik, diabetes och endokrinologi,Molecular Endocrinology,Lund University Research Groups,Genomics, Diabetes and Endocrinology
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- Hansson, Ola (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
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- Lucas, Stephanie (author)
- Lund University,Lunds universitet,Molekylär endokrinologi,Forskargrupper vid Lunds universitet,Molecular Endocrinology,Lund University Research Groups
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- Nevsten, Pernilla (author)
- Lund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- Fernandez, Celine (author)
- Lund University,Lunds universitet,Molekylär endokrinologi,Forskargrupper vid Lunds universitet,Molecular Endocrinology,Lund University Research Groups
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- Klint, Cecilia (author)
- Lund University,Lunds universitet,Molekylär endokrinologi,Forskargrupper vid Lunds universitet,Molecular Endocrinology,Lund University Research Groups
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- Movérare-Skrtic, Sofia (author)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin,Institute of Medicine, Department of Internal Medicine
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- Sundler, Frank (author)
- Lund University,Lunds universitet,Institutionen för experimentell medicinsk vetenskap,Medicinska fakulteten,Department of Experimental Medical Science,Faculty of Medicine
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- Ohlsson, Claes, 1965 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin,Institute of Medicine, Department of Internal Medicine
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- Holm, Cecilia (author)
- Lund University,Lunds universitet,Molekylär endokrinologi,Forskargrupper vid Lunds universitet,Molecular Endocrinology,Lund University Research Groups
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(creator_code:org_t)
- 2008-03-12
- 2008
- English.
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In: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 3:3
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Abstract
Subject headings
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- BACKGROUND: Hormone-sensitive lipase (HSL) is expressed predominantly in adipose tissue, where it plays an important role in catecholamine-stimulated hydrolysis of stored tri- and diglycerides, thus mobilizing fatty acids. HSL exhibits broad substrate specificity and besides acylglycerides it hydrolyzes cholesteryl esters, retinyl esters and lipoidal esters. Despite its role in fatty acid mobilization, HSL null mice have been shown to be resistant to diet-induced obesity. METHODOLOGY/PRINCIPAL FINDINGS: Following a high-fat diet (HFD) regimen, energy expenditure, measured using indirect calorimetry, was increased in HSL null mice. White adipose tissue of HSL null mice was characterized by reduced mass and reduced protein expression of PPARgamma, a key transcription factor in adipogenesis, and stearoyl-CoA desaturase 1, the expression of which is known to be positively correlated to the differentiation state of the adipocyte. The protein expression of uncoupling protein-1 (UCP-1), the highly specific marker of brown adipocytes, was increased 7-fold in white adipose tissue of HSL null mice compared to wildtype littermates. Transmission electron microscopy revealed an increase in the size of mitochondria of white adipocytes of HSL null mice. The mRNA expression of pRb and RIP140 was decreased in isolated white adipocytes, while the expression of UCP-1 and CPT1 was increased in HSL null mice compared to wildtype littermates. Basal oxygen consumption was increased almost 3-fold in white adipose tissue of HSL null mice and was accompanied by increased uncoupling activity. CONCLUSIONS: These data suggest that HSL is involved in the determination of white versus brown adipocytes during adipocyte differentiation The exact mechanism(s) underlying this novel role of HSL remains to be elucidated, but it seems clear that HSL is required to sustain normal expression levels of pRb and RIP140, which both promote differentiation into the white, rather than the brown, adipocyte lineage.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
Keyword
- Adipocytes
- cytology
- Adipose Tissue
- Brown
- cytology
- Animals
- Cell Differentiation
- Diet
- Female
- Male
- Mice
- Mice
- Inbred C57BL
- Mice
- Knockout
- Microscopy
- Electron
- Transmission
- Obesity
- genetics
- Sterol Esterase
- genetics
- physiology
Publication and Content Type
- ref (subject category)
- art (subject category)
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Ström, Kristoffe ...
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Hansson, Ola
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Lucas, Stephanie
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Nevsten, Pernill ...
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Fernandez, Celin ...
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Klint, Cecilia
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Movérare-Skrtic, ...
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Sundler, Frank
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Ohlsson, Claes, ...
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Holm, Cecilia
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Endocrinology an ...
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PLoS ONE
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University of Gothenburg
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Lund University