Johansson I, Alm P
Department of Cariology, University of Umeå, Sweden.
Scand J Dent Res. 1989 Dec;97(6):505-10. doi: 10.1111/j.1600-0722.1989.tb00924.x.
Powdered diets, of three different levels of protein, were given to groups of adult male rats for 21 days. Two diets with reduced protein content, 5% or 10% casein, were given to experimental rats. A diet with an adequate protein content, 20% casein, was given to controls. A reference group of rats was fed a standard pellet diet for the same period. At the end of the experimental period, the parotid and the submandibular glands were removed and subjected to electron microscopy. The zymogen granules of acinar cells in the parotid glands from the rats receiving the 5% protein diet had lost their normal opaqueness and turned electron lucid whereas parotid glands from the rats fed the 20%, the 10%, and the standard pellet diet exhibited normal acinar cells. The ultrastructure of submandibular acinar cells was not affected in any dietary group.
将三种不同蛋白质水平的粉状日粮喂给成年雄性大鼠组，持续21天。给实验大鼠喂食两种蛋白质含量降低的日粮，即5%或10%酪蛋白的日粮。给对照组喂食蛋白质含量充足的日粮，即20%酪蛋白的日粮。一组参比大鼠在同一时期喂食标准颗粒日粮。在实验期结束时，取出腮腺和颌下腺并进行电子显微镜检查。接受5%蛋白质日粮的大鼠腮腺腺泡细胞的酶原颗粒失去了正常的不透明性，变为电子透明，而喂食20%、10%酪蛋白日粮和标准颗粒日粮的大鼠腮腺显示腺泡细胞正常。颌下腺泡细胞的超微结构在任何日粮组中均未受到影响。
