Taraschewski H, Mackenstedt U
Institut für Spezielle Zoologie und Parasitologie, Ruhr-Universität-Bochum, Federal Republic of Germany.
Parasitol Res. 1991;77(6):536-41. doi: 10.1007/BF00928423.
Four palaeacanthocephalans and two eoacanthocephalans from fish were autoradiographically investigated for their in vitro uptake of tritiated lysin. All worms took up the labelled amino acid at their surface without showing a species-specific pattern. The tegument of the metasoma was more heavily labelled than the presomal tegument, suggesting that the worms predominantly absorb the nutrient from the food inside the host's gut in vivo. Within the metasomal tegument the nuclei revealed the most intense labelling. In the muscles the outer myogenic belt absorbed more radioactivity than did the enclosed cytoplasmic core. In female worms the ovarian balls and eggs that showed incomplete eggshell formation were highly labelled. In male worms the cement glands showed the most intense labelling of all organs inside the body cavity. We conclude that the investigated acanthocephalans require lysin for protein synthesis and for the coding of protein synthesis in the tegumental nuclei.
对从鱼类体内采集的4种古棘头虫和2种新棘头虫进行了放射自显影研究，以观察它们在体外对氚标记赖氨酸的摄取情况。所有蠕虫在其体表摄取了标记氨基酸，未表现出物种特异性模式。后体的皮层比前体皮层标记更重，这表明蠕虫在体内主要从宿主肠道内的食物中吸收营养。在后体皮层内，细胞核显示出最强的标记。在肌肉中，外层肌原带比封闭的细胞质核心吸收更多的放射性。在雌虫中，卵巢球和蛋壳形成不完全的卵被高度标记。在雄虫中，粘腺在体腔内所有器官中显示出最强的标记。我们得出结论，所研究的棘头虫需要赖氨酸用于蛋白质合成以及皮层细胞核中蛋白质合成的编码。
