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Concordance of in vivo microdialysis and in vitro techniques in the studies of adipose tissue metabolism

International Journal of Obesity volume 24, pages 1426–1432 (2000)Cite this article

Abstract

BACKGROUND: Adipose tissue metabolism can be investigated directly in vivo by microdialysis and indirectly in vitro using isolated adipocytes. The in vitro studies are relatively easy to make and they give information about specific tissue metabolism. The in vivo studies, on the other hand, are supposed to give relevant data about tissue physiology interacting with other metabolic systems at the body level.

OBJECTIVE: To investigate the concordance between the results on responsiveness to stimulation of lipolysis from in vivo microdialysis and in vitro isolated adipocytes.

SUBJECTS: Altogether 22 massively obese otherwise healthy subjects (seven men and 15 women, age 41 (26–55) y, BMI 51.5 (37.5–73.9) kg/m2, mean (range)) going through the gastric banding operation participated in the study.

METHODS: The microdialysis study was done after an overnight fast at rest. Lipolysis was stimulated with isoprenaline that was perfused into the subcutaneous abdominal adipose tissue. Local blood flow was estimated by ethanol dilution method. Adipose tissue biopsy for the in vitro study was taken from subcutaneous abdominal region during the operation. Lipolysis in freshly isolated adipocytes was stimulated with different concentrations of adrenaline or isoprenaline.

RESULTS: Significant positive correlations were observed between the values of relative stimulation of lipolysis in isolated adipocytes and in the microdialysis study. These correlations improved after correcting for cell size or fat mass.

CONCLUSION: The microdialysis study in vivo and lipolysis assay with isolated adipocytes in vitro provide concordant and complementary information of adipose tissue metabolism in the same individual.

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Acknowledgements

This work was supported by the grants from Academy of Finland, Research Council for Health, Jenny and Antti Wihuri Foundation, Finland, Finnish Cultural Foundation of Northern Savo, Hoffman La Roche Ltd, Basel, Switzerland and the EVO fund by Kuopio University Hospital.

The authors express special thanks to Professor Peter Arner M.D., Karolinska Institute, Stockholm, Sweden, for his valuable comments on the manuscript. The authors also thank Ms Teija Inkinen, Ms Erja Kinnunen, Mrs Kaija Kettunen, Ms Irja Lyytikäinen, Mrs Eeva Hakulinen and Mrs Sirkku Malila for skillful technical assistance and the nursing staff of the Operational Unit 1 and Surgical Ward 2205 of Kuopio University Hospital.

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Authors and Affiliations

  1. Department of Clinical Nutrition, University of Kuopio and Kuopio University Hospital, Kuopio, Finland

    M Kolehmainen, V Tuononen & MIJ Uusitupa

  2. Institute of Biomedicine, University of Helsinki, Helsinki, Finland

    JJ Ohisalo & JM Kaartinen

  3. Department of Surgery, Kuopio University Hospital, Kuopio, Finland

    M Pääkkönen, E Poikolainen & E Alhava

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  1. M Kolehmainen
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  2. JJ Ohisalo
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Correspondence to M Kolehmainen.

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Kolehmainen, M., Ohisalo, J., Kaartinen, J. et al. Concordance of in vivo microdialysis and in vitro techniques in the studies of adipose tissue metabolism. Int J Obes 24, 1426–1432 (2000). https://doi.org/10.1038/sj.ijo.0801438

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