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Increased dihydroceramide/ceramide ratio mediated by defective expression of degs1 impairs adipocyte differentiation and function

Barbarroja, Nuria (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom; Instituto Maimónides de Investigación Biomédica de Córdoba, Reina Sofia University Hospital, Córdoba, Spain
Rodriguez-Cuenca, Sergio (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom
Nygren, Heli (författare)
VTT Technical Research Centre of Finland, Espoo, Finland
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Camargo, Antonio (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom; Lipids and Atherosclerosis Research Unit, Instituto Maimónides de Investigación Biomédica de Córdoba, Reina Sofia University Hospital, Córdoba, Spain
Pirraco, Ana (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom; Department of Biochemistry (U38-FCT), Faculty of Medicine, University of Porto, Porto, Portugal
Relat, Joana (författare)
Departament de Bioquímica i Biologia Molecular, Universitat de Barcelona, Barcelona, Spain
Cuadrado, Irene (författare)
Departamento de Farmacología, Universidad Complutense de Madrid, Madrid, Spain
Pellegrinelli, Vanessa (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom
Medina-Gomez, Gema (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom
Lopez-Pedrera, Chary (författare)
Instituto Maimónides de Investigación Biomédica de Córdoba, Reina Sofia University Hospital, Córdoba, Spain
Tinahones, Francisco J. (författare)
CIBER in Physiopathology of Obesity and Nutrition (CB06/03), Instituto de Salud Carlos III, Madrid, Spain; Instituto de Investigación Biomédica de Málaga, Hospital Virgen de la Victoria, Malaga, Spain
Symons, J. David (författare)
College of Health, University of Utah, Salt Lake City UT, United States; Division of Endocrinology, Metabolism, and Diabetes, University of Utah, Salt Lake City UT, United States
Summers, Scott A. (författare)
Program in Cardiovascular and Metabolic Disorders, Duke-National University, Singapore Graduate Medical School, Singapore, Singapore
Oresic, Matej, 1967- (författare)
Örebro universitet,Institutionen för medicinska vetenskaper,VTT Technical Research Centre of Finland, Espoo, Finland; Steno Diabetes Center, Gentofte, Denmark
Vidal-Puig, Antonio (författare)
Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom; Wellcome Trust Sanger Institute, Hinxton, United Kingdom
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 (creator_code:org_t)
2015
2015
Engelska.
Ingår i: Diabetes. - 0012-1797 .- 1939-327X. ; 64:4, s. 1180-1192
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Adipose tissue dysfunction is an important determinant of obesity-associated, lipid-induced metabolic complications. Ceramides are well-known mediators of lipid-induced insulin resistance in peripheral organs such as muscle. DEGS1 is the desaturase catalyzing the last step in the main ceramide biosynthetic pathway. Functional suppression of DEGS1 activity results in substantial changes in ceramide species likely to affect fundamental biological functions such as oxidative stress, cell survival, and proliferation. Here, we show that degs1 expression is specifically decreased in the adipose tissue of obese patients and murine models of genetic and nutritional obesity. Moreover, loss-of-function experiments using pharmacological or genetic ablation of DEGS1 in preadipocytes prevented adipogenesis and decreased lipid accumulation. This was associated with elevated oxidative stress, cellular death, and blockage of the cell cycle. These effects were coupled with increased dihydroceramide content. Finally, we validated in vivo that pharmacological inhibition of DEGS1 impairs adipocyte differentiation. These data identify DEGS1 as a new potential target to restore adipose tissue function and prevent obesity-associated metabolic disturbances.

Ämnesord

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper (hsv//swe)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Basic Medicine (hsv//eng)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine (hsv//eng)

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