硬骨鱼类黄色素细胞的研究进展

Research development of xanthophore in Osteichthyes

  • 摘要: 色素细胞是动物体内产生色素的一类特化细胞,其色素颗粒可选择性吸收或反射特定波长的光,产生多种颜色,从而形成动物的体色。色素细胞由胚胎神经嵴细胞分化形成,在动物警戒、求偶、伪装、拟态、隐蔽以及环境适应性等一系列生物学过程中起着关键作用。黄色素细胞的受关注度仅次于黑色素细胞,其合成含有类胡萝卜素和蝶啶成分的红/黄色素小体,可以形成从白色到红色等一系列的颜色,是研究色素细胞互作、色素沉着以及生物进化机制的理想模型。本文综述了鱼类色素细胞的来源和分布、黄色素细胞的发育和分化以及蝶啶色素合成代谢机制三个方面,并提出了现阶段黄色素细胞研究中存在的缺陷,为鱼类体色形成、色素细胞分化及体色性状分子选育提供参考依据。

     

    Abstract: Chromatophores are specialized cells that synthesize pigments in animals. They play an important role not only in coloration, but also have crucial functions in a series of biological processes such as warning, mating, camouflage, mimicry, concealment and environmental adaptation. Compared with amniotes that only depended on melanocytes to produce color pattern, teleost and other ectothermic vertebrates derived more than six types of chromatophores from embryonic neural crest, including melanophores, xanthophores, erythrophores, iridophores, leucophores and cyanophores. During embryonic development, neural crest cells differentiate into the precursors of chromatophores along the dorsal ventral axis and then migrate to specific sites to mature pigment cells, which can selectively absorb or reflect specific wavelength of light to form multiple pigment patterns and colors. So, the number and distribution area of pigment cells, the dispersion and contraction of pigment particles all affect body color formation. Xanthophores are the most concerned chromatophores, second only to melanophores. Xanthophores have red/yellow xanthosomes composed of carotenoids and pteridines, which produces a series of colors from white to red and is an ideal model for pigment cells interaction, pigmentation and animal evolution. Though many mechanisms of xanthophores differentiation and pigmentation are starting to be elucidated, few reports summarize the available progression in xanthophore biology and genetics. Thus, this review introduces the advances in research of origin and distribution of fish chromatophores, the development and differentiation of xanthophores, the regulatory mechanism of pteridine pigments synthesis and the inadequacies in current xanthophores researches. It provide useful information in fish coloration, chromatophores differentiation and molecular breeding of body color phenotype.

     

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