Newly developed primary culture of rat visceral adipocytes and their in vitro characteristics

Authors

  • Kyoko Shimizu,

    1. Center for Advanced Science and Technology 306, Primary Cell Co. Ltd., Hokkaido University, Kita-21 Nishi-11, Sapporo, Hokkaido 001-0021, Japan
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  • Masato Sakai,

    1. Center for Advanced Science and Technology 306, Primary Cell Co. Ltd., Hokkaido University, Kita-21 Nishi-11, Sapporo, Hokkaido 001-0021, Japan
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  • Mamiko Ando,

    1. Faculty of Human Life Science, Fuji Women's University, Hokkaido 061-0067, Japan
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  • Hideyuki Chiji,

    1. Faculty of Human Life Science, Fuji Women's University, Hokkaido 061-0067, Japan
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  • Teruo Kawada,

    1. Division of Food Science and Biochemistry, Graduate School of Agriculture, Kyoto University, Kyoto 105-0001, Japan
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  • Hitoshi Mineo,

    Corresponding author
    1. Center for Advanced Science and Technology 306, Primary Cell Co. Ltd., Hokkaido University, Kita-21 Nishi-11, Sapporo, Hokkaido 001-0021, Japan
      Corresponding author. Tel./fax: +81 11 706 7325. mineo@primarycell.com
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  • Toshio Taira

    1. Center for Advanced Science and Technology 306, Primary Cell Co. Ltd., Hokkaido University, Kita-21 Nishi-11, Sapporo, Hokkaido 001-0021, Japan
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Corresponding author. Tel./fax: +81 11 706 7325. mineo@primarycell.com

Abstract

We have recently developed a primary culture system for visceral adipocytes (VAs) using stomal-vascular cells (SVCs) isolated from the mesenteric fat tissue of male Sprague—Dawley rats of 3–5 weeks of age. Modified Dulbecco's modified Eagle medium (DMEM)/F12 containing 17 μM pantothenic acid, 33 μM biotin, 100 μM ascorbic acid, 1 μM octanoic acid, 50 nM triiodothyronine, 10 μg/ml insulin, 10% newborn calf serum (NCS), 100 units/ml penicillin and 100 μg/ml streptomycin was used as a basal culture medium, which did not contain any synthetic compounds usually used to promote adipogenesis, such as indomethacin, dexamethasone, or peroxisome proliferator-activated receptor (PPAR)-γ agonists. The SVCs differentiated and proliferated efficiently, and formed a confluent monolayer in 3 days. The VAs accumulated lipids droplets in their cytoplasm at ∼7 days. The differentiation rate from applied SVCs to mature adipocytes was >80% per culture. Adiponectin concentration in the medium increased from Day 5 to Day 7. Application of lipid emulsion stimulated maturation of the SVCs into VAs, as well as subsequent lipid accumulation. Norepinephrine (2 × 10−5 mM) reduced the size of lipid particles and decreased triglyceride (TG) content in the matured adipocytes at 30 min. These results indicate that the new culture system is sufficient to maintain the physiological activity of visceral adipose tissue similar to that in vivo, making it an appropriate and useful tool for basic and applied research on obesity.

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