Abstract
This study was to determine the effect of a seaweed Ascophyllum nodosum extract (SE) containing 220 mg g−1 phlorotannins on differentiation and fatty acid accumulation in differentiating 3T3-L1 adipocytes. 3T3-L1 cells (2 × 104 mL−1) were seeded to 24-well plates and proliferated to reach confluence and then were treated with media containing 0, 12.5, 25, 50, 75 and 100 μg mL−1 SE for 8 days. Dexamethasone, methyl-isobutylxanthine and insulin (DMI) were added to the media in the first 2 days to induce cell differentiation. On day 8 the adipocytes were harvested for measuring cellular fatty acid concentration and the activity of glycerol-3-phosphate dehydrogenase (GPDH). It was found that treatment with SE increased (P < 0.01, n = 6) cellular myristoleic acid (C14:1), palmitoleic acid (C16:1) and oleic acid (C18:1) and total monounsaturated fatty acids (MUFA) without significantly affecting the cell number and saturated fatty acid (SFA). Ratios of MUFA/SFA, C14:1/C14:0, C16:1/C16:0 and C18:1/C18:0 in cellular lipids increased (P < 0.05, n = 6) with the SE treatment in a dose dependent manner (P < 0.001). Treatment with 75 μg mL−1 SE depressed (P < 0.05) cellular GPDH activity. The results indicate that the biological factors in the SE may be involved in differentiation and MUFA accumulation in adipocytes.
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Abbreviations
- DHAP:
-
Dihydroxyacetone phosphate
- DMEM:
-
Dulbecco’s modified Eagle’s medium
- DMI:
-
Dexamethasone, methyl-isobutylxanthine and insulin
- FA:
-
Fatty acids
- FBS:
-
Fetal bovine serum
- GPDH:
-
Glycerol-3-phosphate dehydrogenase
- MUFA:
-
Monounsaturated fatty acids
- NADH:
-
β-Nicotinamide adenine dinucleotide, reduced form
- PBS:
-
Phosphate buffered saline
- SFA:
-
Saturated fatty acids
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Acknowledgments
M.L.H. thanks B. Pink and K. Jakober for their help in checking and revising the manuscript. The manuscript is Lethbridge Research Centre contribution #387-08046.
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He, M.L., Wang, Y., You, J.S. et al. Effect of a Seaweed Extract on Fatty Acid Accumulation and Glycerol-3-Phosphate Dehydrogenase Activity in 3T3-L1 Adipocytes. Lipids 44, 125–132 (2009). https://doi.org/10.1007/s11745-008-3256-4
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DOI: https://doi.org/10.1007/s11745-008-3256-4