Zhang Haoran, Lin Jiali, Guo Haoji, He Xianda, Jiang Wanying, Yan Lin, Yan Kuoqiu, Wen Xiaobo, Lin Fan
College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.
Agro-Tech Extension Center of Guangdong Province, Guangzhou 510520, China.
Foods. 2025 Apr 30;14(9):1586. doi: 10.3390/foods14091586.
The swim bladder of Chu's croaker () is an expensive food with high texture requirements. In this study, we found that male swim bladder had better toughness than female. To explore the main determining factor affecting texture properties of swim bladder, a comparison of proximate composition, collagen microstructure, and proteomics was carried out between male and female swim bladders. Results indicated that it should be collagen microstructure mainly affecting the texture characteristics of swim bladder, rather than the composition. The collagen fibers in male swim bladder were significantly more uniform and regular than female. By proteomics analysis, it was further discovered that collagen XII was the most significantly up-regulated protein in the male swim bladder and may be crucial in morphology of collagen fibers. In summary, collagen XII was identified to be a potential key molecule affecting the texture of the swim bladder, mainly through regulating properties of collagen fibers. This study contributes to a deeper understanding of the structural characteristics of swim bladder collagen and provides critical molecular targets for the regulation of texture in swim bladder.
鮸鱼的鱼鳔是一种对质地要求很高的昂贵食材。在本研究中，我们发现雄性鱼鳔的韧性比雌性更好。为探究影响鱼鳔质地特性的主要决定因素，对雄性和雌性鱼鳔的近似成分、胶原微结构和蛋白质组学进行了比较。结果表明，主要影响鱼鳔质地特征的应该是胶原微结构，而非成分。雄性鱼鳔中的胶原纤维比雌性的明显更均匀、规则。通过蛋白质组学分析，进一步发现胶原XII是雄性鱼鳔中上调最显著的蛋白质，可能对胶原纤维的形态起关键作用。总之，胶原XII被确定为影响鱼鳔质地的潜在关键分子，主要通过调节胶原纤维的特性来实现。本研究有助于更深入了解鱼鳔胶原的结构特征，并为调控鱼鳔质地提供关键分子靶点。
