Uric acid is a major chemical constituent for the whitish coloration in the medaka leucophores

Author:

Goda Makoto1ORCID,Miyagi Asuka1,Kitamoto Takuya1,Kondo Minako1,Hashimoto Hisashi2ORCID

Affiliation:

1. Preeminent Medical Photonics Education & Research Center Hamamatsu University School of Medicine Hamamatsu Shizuoka Japan

2. Division of Biological Science, Graduate School of Science Nagoya University Nagoya Japan

Abstract

AbstractIn whitish parts of teleost skin, the coloration is attributed to a light scattering phenomenon within light‐reflecting chromatophores, namely leucophores and iridophores, which contain high refractive index materials in their cytoplasmic organelles, leucosomes and light‐reflecting platelets, respectively. Previous chemical examinations revealed that guanine is a major constituent of the materials in the platelets of the iridophores, while, in leucophores, the detailed chemical nature of the materials contained in the leucosomes has not been reported. Here, using liquid chromatography‐tandem mass spectroscopy, we investigated the chemical features of materials eluted from scales, larvae, and single chromatophores of the medaka. Results of the liquid chromatography‐tandem mass spectroscopy suggested that uric acid is a major constituent of the high refractive index materials in medaka leucophores and is a unique marker to investigate the presence of leucophores in the fish. The whitish appearance of the medaka leucophores may be attributed to the light‐scattering phenomenon in leucosomes, which contain highly concentrated uric acid.

Publisher

Wiley

Subject

Dermatology,General Biochemistry, Genetics and Molecular Biology,Oncology

Reference17 articles.

1. Chemical characterization of reflecting platelets in motile iridophores of blue damselfish

2. Cytophysiology of Fish Chromatophores

3. Photo‐electric recording of motile responses of fish leucophores;Fujii R.;Annotationes Zoologicae Japonenses,1979

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