Palladino Antonio, De Felice Elena, Attanasio Chiara, Barone Carmela M A, Crasto Antonio, D'Angelo Livia, Giaquinto Daniela, Lambiase Claudia, Scocco Paola, Serrapica Francesco, Maruccio Lucianna
Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy.
School of Biosciences and Veterinary Medicine, University of Camerino, Via Gentile III da Varano, 62032 Camerino, Italy.
Animals (Basel). 2023 Jan 26;13(3):420. doi: 10.3390/ani13030420.
Among the most-used fish species in aquaculture is the Nile tilapia, due to its rapid growth rate and its adaptation to a wide range of farming conditions. A careful description of the morphology of the digestive tract, particularly the esophagus and stomach, allows a better understanding of the relationship between structure and function. Combining scanning and light microscopy we highlighted the presence of five different zones in the stomach (1: esophagus-gastric lumen passage; 2: descending glandular portion; 3: fundic portion; 4: ascending glandular portion; 5: gastric-pyloric transition portion). Histochemical investigation showed a secretion of carboxylates mucopolysaccharides along the esophagus and sulphated complex carbohydrates in the stomach. These results suggest that mucins play a protective role of the epithelial lining, which is essential for a correct digestive process. Finally, the characterization of the main cellular structures may be inspiring for more advanced studies aiming to decipher the role of specific molecules, such as neuropeptides, involved in the physiological digestive process.
尼罗罗非鱼是水产养殖中最常用的鱼类品种之一，这是因为它生长速度快，且能适应多种养殖条件。对消化道形态，尤其是食管和胃的形态进行细致描述，有助于更好地理解结构与功能之间的关系。我们结合扫描电子显微镜和光学显微镜观察，发现胃内存在五个不同区域（1：食管-胃腔通道；2：下行腺部；3：胃底部；4：上行腺部；5：胃-幽门过渡部）。组织化学研究表明，食管中有羧酸盐粘多糖分泌，胃中有硫酸化复合碳水化合物分泌。这些结果表明，粘蛋白对上皮衬里起到保护作用，这对正常消化过程至关重要。最后，主要细胞结构的特征可能会启发更多旨在破译参与生理消化过程的特定分子（如神经肽）作用的深入研究。
