1. Establishment of a quantitative in vivo method for estimating adipose tissue volumes and the effects of dietary soy sauce oil on adipogenesis in medaka, Oryzias latipes
- Author
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Shozo Sugiura, Yoshiko Shimizu, Syota Aota, Hiroyuki Kawachi, Gouhei Oka, Matoki Sanada, Yoshimasa Imai, Yasuhiro Tonoyama, Nobuyoshi Shimizu, Nobuaki Hori, and Masaki Tsukada
- Subjects
0301 basic medicine ,Life Cycles ,Physiology ,Oryzias ,Peptide Hormones ,Adipose tissue ,lcsh:Medicine ,Aquaculture ,Biochemistry ,Animals, Genetically Modified ,Larvae ,Genes, Reporter ,Animal Cells ,Immune Physiology ,Japanese rice fish ,Medicine and Health Sciences ,Adipocytes ,Receptor ,lcsh:Science ,Connective Tissue Cells ,Innate Immune System ,Multidisciplinary ,Adipogenesis ,biology ,Chemistry ,Luciferase Assay ,Soy Foods ,Peroxisome ,Lipids ,Cell biology ,Enzymes ,Bioassays and Physiological Analysis ,Adipose Tissue ,Connective Tissue ,Larva ,Cytokines ,Adiponectin ,Anatomy ,Cellular Types ,Oxidoreductases ,Luciferase ,Research Article ,Fish Proteins ,Green Fluorescent Proteins ,Immunology ,Fatty Acid-Binding Proteins ,Research and Analysis Methods ,03 medical and health sciences ,Dietary Fats, Unsaturated ,Adipokines ,In vivo ,Oxazines ,Animals ,Fluorescent Dyes ,Nutrition ,Enzyme Assays ,lcsh:R ,Biology and Life Sciences ,Proteins ,Cell Biology ,Molecular Development ,biology.organism_classification ,Lipid Metabolism ,Animal Feed ,Hormones ,Diet ,PPAR gamma ,030104 developmental biology ,Biological Tissue ,Gene Expression Regulation ,Immune System ,Enzymology ,lcsh:Q ,Energy Metabolism ,Biochemical Analysis ,Activin Receptors, Type I ,Oils ,Developmental Biology - Abstract
Adipose tissue, which is conserved in higher eukaryotes, plays central roles in controlling the body’s energy balance, including excess energy storage and energy expenditure during starvation. In adipogenesis, intranuclear receptor, peroxisome proliferator–activated receptor gamma (PPARγ) is a key molecule, and PPARγ agonists can promote adipogenesis. Many studies on the in vitro screening of PPARγ agonists with compounds derived from various materials have been reported; however, in vivo assays for quick examination of these feeding effects have not been established. In this study, we developed a technique using a lipophilic fluorescent reagent, Nile red to quantitatively estimate the adipose tissue volumes by using Japanese rice fish, medaka (Oryzias latipes) and studied effects of dietary soy sauce oil (SSO), which is a discarded by-product from Japanese traditional food and is known to have PPARγ-agonistic activity, on adipogenesis. We found that SSO feeding increased the adipose tissue volumes, and the expression levels of adipogenesis-related genes increased in these medaka larvae. These results suggest that SSO feeding increases the adipose tissue volumes through adipogenesis promotion by PPARγ-agonistic activity in medaka, and medaka is a powerful model for studying adipogenesis. Furthermore, our study also demonstrates the availability of SSO as a dietary additive for farmed fish.
- Published
- 2018