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Obesity and Insulin Resistance-Related Changes in the Expression of Lipogenic and Lipolytic Genes in Morbidly Obese Subjects

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Abstract

Background

The storage capacity of adipose tissue may be an important factor linking obesity, insulin resistance (IR), and associated morbidities. The aim of this study was to analyze the expression of lipogenic and lipolytic genes in adipose tissue and the influence of IR.

Methods

We studied the mRNA expression of peroxisome proliferator-activated receptor-γ (PPARγ) and lipogenic and lipolytic enzymes in the visceral (VAT) and subcutaneous adipose tissue (SAT) from 23 morbidly obese patients (MO; 13 with low IR and ten with high IR) and from 15 healthy, lean controls.

Results

In the VAT and SAT from the MO, we found an increased expression of PPARγ (p = 0.001 and p = 0.022, respectively), acyl-coenzyme A (CoA)/cholesterol acyltransferase (p < 0.001 and p < 0.001), aquaporin 7 (p < 0.001 and p = 0.003), and adipose triglyceride lipase (p < 0.001 and p < 0.001) and a reduced expression of acetyl-coenzyme A carboxylase (p = 0.004 and p < 0.001), independently of the state of IR. The expression of phosphoenolpyruvate carboxykinase and acyl-CoA synthetase, however, was significantly lower in the MO with high IR (p < 0.05). Glycerol kinase (p = 0.010), hormone-sensitive lipase (p < 0.001), and perilipin (p = 0.006) were only significantly increased in VAT. Acyl-CoA synthetase (p = 0.012) and fatty acid binding protein-4 (p = 0.003) were only significantly decreased in SAT. The expression of the genes studied was only greater in the SAT than the VAT in the controls.

Conclusion

Our results show an upregulation of genes facilitating triglyceride/fatty acid cycling and a reduction in the genes involved in de novo synthesis of fatty acids in morbid obesity. The expression of some of the genes studied seems to be related with the state of IR. VAT and SAT differ metabolically and also between controls and MO.

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Acknowledgments

We thank Ian Johnstone for help with the English language version of the text. We thank Juan Alcaide for the technical assistance. This work was supported in part by grants from the Instituto de Salud Carlos III (CP04/00133, CP04/0039, PS09/01060, PS09/00997), Programa Juan de la Cierva (JCI-2009-04086), and Servicio Andaluz de Salud (PI 0255/2007 and 0438/2006). CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN) and CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) are ISCIII projects.

Conflict of interest disclosure

None of the authors has anything to disclose.

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Authors and Affiliations

  1. CIBER Fisiopatología Obesidad y Nutrición (CIBEROBN), Hospital Clínico Virgen de la Victoria, Malaga, Spain

    F. J. Tinahones, M. Macias-Gonzalez & E. García-Fuentes

  2. Servicio de Endocrinología y Nutrición, Hospital Clínico Virgen de la Victoria, Malaga, Spain

    F. J. Tinahones & J. M. García-Almeida

  3. CIBERDEM, Hospital Universitari de Tarragona Joan XXIII. IISPV, Universitat Rovira i Virgili, Tarragona, Spain

    L. Garrido-Sanchez, M. Miranda, V. Ceperuelo & J. Vendrell

  4. Fundación IMABIS, Malaga, Spain

    M. Macias-Gonzalez & E. García-Fuentes

  5. Servicio de Cirugía General, Hospital Clínico Virgen de la Victoria, Malaga, Spain

    E. Gluckmann & J. Rivas-Marin

  6. Unidad de Investigación, Edificio de Docencia e Investigación, Hospital Universitari de Tarragona Joan XXIII, C/ Dr. Mallafrè Guasch, 4, 43007, Tarragona, Spain

    L. Garrido-Sanchez

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  1. F. J. Tinahones
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  2. L. Garrido-Sanchez
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  3. M. Miranda
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  4. J. M. García-Almeida
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  5. M. Macias-Gonzalez
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  6. V. Ceperuelo
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  7. E. Gluckmann
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  9. J. Vendrell
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  10. E. García-Fuentes
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Corresponding author

Correspondence to L. Garrido-Sanchez.

Additional information

García-Fuentes E and Garrido-Sanchez L contributed equally to this work.

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Tinahones, F.J., Garrido-Sanchez, L., Miranda, M. et al. Obesity and Insulin Resistance-Related Changes in the Expression of Lipogenic and Lipolytic Genes in Morbidly Obese Subjects. OBES SURG 20, 1559–1567 (2010). https://doi.org/10.1007/s11695-010-0194-z

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