Abstract
Context:
LPIN1 is the phosphatidic acid phosphatase that produces 1,2-diacylglycerol, and thus it is related to the synthesis of triglycerides in the adipocyte. LPIN1 has a role in lipid synthesis and nuclear receptor coactivation, both of which may be involved in lipid homeostasis and metabolism. Among others, hypoxia and endoplasmic reticulum (ER) stress are being shown to be related to the adipose dysfunction found in human obesity.
Objective:
The aim of this study was to analyze LPIN1 gene expression in human adipose tissue in parallel with several hypoxia, angiogenic, ER stress and peroxisome proliferator-activated receptor (PPAR)-related genes in human obesity.
Design and Patients:
Gene expression was quantified in abdominal (subcutaneous and visceral) adipose tissue from 62 subjects.
Results:
We have shown a marked association between LPIN1 and PPARα gene expression both in subcutaneous and visceral adipose tissues. Similarly, a strong interdependence with vascular endothelial growth factor (VEGF) gene expression was also described; in fact, LPIN1 and VEGF expression levels were significantly decreased with obesity to a similar extent.
Conclusion:
These associations might suggest a possible role of LPIN1 in stress conditions that occur in chronic obesity and underlie insulin resistance.
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Abbreviations
- ACTB:
-
β-actin
- BMI:
-
body mass index
- CHOP10:
-
C/EBP-homologous protein 10
- CRP:
-
C reactive protein
- DBP:
-
diastolic blood pressure
- ER:
-
endoplasmic reticulum
- GLUT1:
-
glucose transporter 1
- HIF-1α:
-
hypoxia-inducible factor 1α
- HSP90:
-
heat shock protein HSP 90-alpha
- LPIN1 :
-
lipin 1 gene
- PGC-1α:
-
PPARγ coactivator 1α
- PPAR:
-
peroxisome proliferator-activated receptor
- PPIA:
-
cyclophilin 1A
- SAT:
-
subcutaneous adipose tissue
- sIL-6:
-
soluble interleukin 6
- VAT:
-
visceral adipose tissue
- VEGF:
-
vascular endothelial growth factor
- XBP1:
-
X-box binding protein-1
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Acknowledgements
This work was supported by FIS 07/1024 and FIS 08/1195 from the Spanish Instituto de Salud Carlos III, Ministerio de Sanidad y Consumo with the participation of the European Regional Development Fund (ERDF). XE is supported by a fellowship from the JdlC programme and Grant JDCI20071020. We gratefully acknowledge the invaluable collaboration of Symeon Siniossoglou (Cambridge Institute for Medical Research (CIMR), Cambridge, UK), the Servei de Recursos Científics i Tècnics of Universitat Rovira i Virgili, the statistical assistance of Pilar Hernández from the IISPV, and the technical assistance of Verònica Alba from the URV. CIBER de Diabetes y Enfermedades Metabólicas Asociadas is an ISCIII project. This work was supported by FIS 07/1024 and FIS 08/1195 from the Spanish Instituto de Salud Carlos III, Ministerio de Sanidad y Consumo.
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Miranda, M., Escoté, X., Ceperuelo-Mallafré, V. et al. Relation between human LPIN1, hypoxia and endoplasmic reticulum stress genes in subcutaneous and visceral adipose tissue. Int J Obes 34, 679–686 (2010). https://doi.org/10.1038/ijo.2009.290
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DOI: https://doi.org/10.1038/ijo.2009.290
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