澳大利亚肺鱼(Neoceratodus forsteri)皮肤的发育和结构与四足动物表皮适应性的关系

IF 1.1 4区 生物学 Q4 ANATOMY & MORPHOLOGY
Acta Zoologica Pub Date : 2023-04-11 DOI:10.1111/azo.12462
Lorenzo Alibardi
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引用次数: 1

摘要

对澳大利亚肺鱼(Neoceratodus forsteri)皮肤发育的分析表明,在体长为 2-5 厘米的蝌蚪体内,角质细胞形成 2 至 3 层不规则层,在体长为 16.5-26 厘米的幼鱼体内,角质细胞完全分层(7 至 12 层)。表皮产生粘液,主要含有酸性的中间丝状角蛋白,但也有少量的中性碱性角蛋白(pI 7.0-7.3),这在鱼类中是独一无二的。后者的角蛋白为 60-62 kDa,一般存在于四足动物中,但目前尚不清楚 N. forsteri 中酸性、中性和碱性角蛋白的具体基因结构和氨基酸序列。虽然生化数据表明存在非角蛋白蛋白,包括分子量约为 32 kDa 的碱性蛋白(pI 8.0-8.2),但没有检测到其他表皮蛋白。鳞片的棘骨层含有参与矿化的糖蛋白,如骨连蛋白和骨素。此外,在长达 26 厘米的幼鱼鳞片中还检测到了碱性磷酸酶,它参与胶原基质上的钙沉淀。本综述认为,从最近测序的该鱼种基因组中获得的表皮和真皮蛋白质注释数据知识将有助于解决四足动物皮肤进化的研究问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development and structure of the skin in the Australian lungfish (Neoceratodus forsteri) in relation to epidermal adaptation of tetrapods

Analysis of skin development in the Australian lungfish, Neoceratodus forsteri, indicates that keratinocytes form 2 to 3 irregular layers in tadpoles of 2–5 cm in length and are fully stratified (7–12 layers) in juveniles of 16.5–26 cm in length. The epidermis produces mucus and mainly contains intermediate filament keratins of acidic nature but also a minute amount of neutral-basic keratins (pI 7.0–7.3), which is unique among fish. The latter keratins of 60–62 kDa, are generally present in tetrapods but the specific gene structure and amino sequence of acidic, neutral and basic keratins in N. forsteri are presently unknown. No other epidermal proteins are detected although biochemical data suggest the presence of non-keratin proteins, including a basic type (pI 8.0–8.2) of around 32 kDa of molecular weight. The spinulated bony layer of elasmoid scales contains glycoproteins involved in mineralization, such as osteonectin and osteopontin. Also, alkaline phosphatase, involved in calcium precipitation onto the collagen matrix, has been detected in scales of juveniles up to 26 cm in length. The present review concludes that the knowledge of the data derived from epidermal and dermal protein annotation from the recently sequenced genome of this fish species will contribute to address the study on the evolution of tetrapod skin.

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来源期刊
Acta Zoologica
Acta Zoologica 生物-动物学
CiteScore
2.90
自引率
8.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.
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