Adipose TriGlyceride Lipase (ATGL) and Hormone-Sensitive Lipase (HSL) protein expression is decreased in the obese insulin resistant state
| Autor: | Carine Valle, Egbert F. Smit, Ellen E. Blaak, Peter Arner, Wim H. M. Saris, Johan W. E. Jocken, Dominique Langin, Cecilia Holm, Gabby B. Hul |
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| Přispěvatelé: | Humane Biologie, RS: NUTRIM School of Nutrition and Translational Research in Metabolism, RS: NUTRIM - R1 - Metabolic Syndrome, Department of Human Biology, Nutrition and Toxicology, Maastricht University [Maastricht]-Research Institute Maastricht, Unité de recherche sur les obésités, IFR 31 Louis Bugnard (IFR 31), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Biochimie [CHU Toulouse], Institut Fédératif de Biologie (IFB), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Pôle Biologie [CHU Toulouse], Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Division of Diabetes, Metabolism, and Endocrinology, Lund University [Lund], Department of medicine [Stockholm], Karolinska Institutet [Stockholm]-Karolinska University Hospital [Stockholm], This study has received support from NUGENOB (Nutrient-Gene Interaction in Human Obesity, Implications for Dietary Guidelines) supported by the European Commission (Contract QLK1-CT-2000-00618), HEPADIP (Hepatic and Adipose Tissue and Functions in the Metabolic Syndrome) supported by the European Commission as an integrated project under the 6th Framework Programme (Contract LSHM-CT-2005- 018734), and Swedish Research Council Project 112 84., European Project: 32591,HEPADIP, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Toulouse [Toulouse]-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Toulouse [Toulouse]-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Biochimie [Purpan], Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut Fédératif de Biologie (IFB) - Hôpital Purpan, Hôpital Purpan [Toulouse], CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse]-Hôpital Purpan [Toulouse], CHU Toulouse [Toulouse], University of Lund, Simon, Marie Francoise, Hepatic and adipose tissue and functions in the metabolic syndrome - HEPADIP - 32591 - OLD, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM) |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Male
Biopsy Endocrinology Diabetes and Metabolism medicine.medical_treatment Clinical Biochemistry Adipose tissue Hormone-sensitive lipase MESH: Regression Analysis Biochemistry MESH: Lipase MESH: Biopsy 0302 clinical medicine Endocrinology Hyperinsulinemia MESH: Obesity MESH: Diet Reducing 2. Zero hunger 0303 health sciences MESH: Middle Aged MESH: Sterol Esterase MESH: Gene Expression Regulation Enzymologic Leptin food and beverages Middle Aged MESH: Insulin Resistance Adipose Tissue MESH: Hyperinsulinism Regression Analysis Female MESH: Adipose Tissue Adult medicine.medical_specialty Diet Reducing 030209 endocrinology & metabolism Biology Gene Expression Regulation Enzymologic MESH: Weight Loss 03 medical and health sciences Insulin resistance Hyperinsulinism Internal medicine Weight Loss [SDV.BBM] Life Sciences [q-bio]/Biochemistry Molecular Biology medicine Humans [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology Obesity RNA Messenger MESH: RNA Messenger 030304 developmental biology MESH: Humans Insulin Biochemistry (medical) MESH: Adult Lipase Sterol Esterase medicine.disease MESH: Male Adipose triglyceride lipase Insulin Resistance MESH: Female |
| Zdroj: | Journal of Clinical Endocrinology & Metabolism, 29(6), 2292-2299. Oxford University Press Journal of Clinical Endocrinology and Metabolism Journal of Clinical Endocrinology and Metabolism, 2007, 92 (6), pp.2292-9. ⟨10.1210/jc.2006-1318⟩ Journal of Clinical Endocrinology and Metabolism, Endocrine Society, 2007, 92 (6), pp.2292-9. ⟨10.1210/jc.2006-1318⟩ |
| ISSN: | 0021-972X 1945-7197 |
| DOI: | 10.1210/jc.2006-1318 |
| Popis: | International audience; AIM/HYPOTHESIS: Obesity is associated with increased triacylglycerol (TAG) storage in adipose tissue and insulin resistance. The mobilization of stored TAG is mediated by hormone-sensitive lipase (HSL) and the recently discovered adipose triglyceride lipase (ATGL). The aim of the present study was to examine whether ATGL and HSL mRNA and protein expression are altered in insulin-resistant conditions. In addition, we investigated whether a possible impaired expression could be reversed by a period of weight reduction. METHODS: Adipose tissue biopsies were taken from obese subjects (n = 44) with a wide range of insulin resistance, before and just after a 10-wk hypocaloric diet. ATGL and HSL protein and mRNA expression was determined by Western blot and quantitative RT-PCR, respectively. RESULTS: Fasting insulin levels and the degree of insulin resistance (using the homeostasis model assessment index for insulin resistance) were negatively correlated with ATGL and HSL protein expression, independent of age, gender, fat cell size, and body composition. Both mRNA and protein levels of ATGL and HSL were reduced in insulin-resistant compared with insulin-sensitive subjects (P < 0.05). Weight reduction significantly decreased ATGL and HSL mRNA and protein expression. A positive correlation between the decrease in leptin and the decrease in ATGL protein level after weight reduction was observed. Finally, ATGL and HSL mRNA and protein levels seem to be highly correlated, indicating a tight coregulation and transcriptional control. CONCLUSIONS: In obese subjects, insulin resistance and hyperinsulinemia are strongly associated with ATGL and HSL mRNA and protein expression, independent of fat mass. Data on weight reduction indicated that also other factors (e.g. leptin) relate to ATGL and HSL protein expression. |
| Databáze: | OpenAIRE |
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