A new approach to measuring vitamin D in human adipose tissue using time-of-flight secondary ion mass spectrometry: A pilot study
Journal article, 2014

Circulating concentrations of vitamin D, 25(OH)D, and 1,25(OH)2D are lower in obese than lean individuals, but little is known about the adipose tissue content of these molecules. The aim of this study was to explore the possibility to use time-of-flight secondary ion mass spectrometry (TOF-SIMS) to measure vitamin D and its metabolites in fat tissue in obese and lean subjects. Abdominal subcutaneous adipose tissue (SAT) biopsies were obtained from three lean and three obese women, and paired biopsies SAT and visceral adipose tissue (VAT) were obtained from three obese subjects during gastric bypass surgery. TOF-SIMS was used to measure vitamin D3, 25(OH)D3, and 1,25(OH)2D3 in adipose tissue. We found that vitamin D3, 25(OH)D3, and 1,25(OH)2D3 in adipose tissue can be measured with TOF-SIMS. In adipose tissue, vitamin D3 and its metabolites were located in adipocyte lipid droplets. The content of vitamin D3 (P = 0.006) and 25(OH)D3 (P = 0.018) were lower in SAT in obese compared with lean women. TOF-SIMS has the potential to semi-quantitatively measure vitamin D metabolites in adipose tissue, and offers a possibility to compare vitamin D levels in different depots and groups of individuals. It also gives the opportunity to explore the localization of vitamin D metabolites at a cellular level.

Adipose tissue

TOF-SIMS

Vitamin D

Author

Per Malmberg

Chalmers, Chemical and Biological Engineering, Analytical Chemistry

Therese Karlsson

University of Gothenburg

Henrik Svensson

University of Gothenburg

Malin Lönn

University of Gothenburg

Nils-Gunnar Carlsson

Chalmers, Chemical and Biological Engineering, Life Sciences, Food and Nutrition Science

Ann-Sofie Sandberg

Chalmers, Chemical and Biological Engineering, Life Sciences, Food and Nutrition Science

Eva Jennische

University of Gothenburg

Amra Osmancevic

Sahlgrenska University Hospital

Agneta Holmäng

University of Gothenburg

Journal of Photochemistry and Photobiology B: Biology

1011-1344 (ISSN)

Vol. 138 295-301

Subject Categories

Dermatology and Venereal Diseases

Areas of Advance

Life Science Engineering (2010-2018)

DOI

10.1016/j.jphotobiol.2014.06.008

PubMed

25010290

More information

Latest update

4/17/2018