Bokhorov O, Lazarov I, Bozhkov S
Vet Med Nauki. 1984;21(3):48-57.
An experiment was carried out with 45 male broiler birds divided into three groups: I (controls), given a full-diet ration with 22.16 per cent protein; II, given a ration with 18.12 per cent protein; and III, fed a ration with 14.14 per cent protein. The chickens were given the respective ration mixture up to the age of 35 days. It was found that the group treated with the lowest amount of protein showed dependably lower absorption of 35S-thiamine as compared to the control group. The lower intake of dietary protein (groups II and III) was found to produce a negative effect on thiamine phosphates and the total and free thiamine in the liver. Protein deficiency led to a reliable drop of the cyclic adenosine 3', 5'-monophosphate in the jejunal mucosa and the liver tissue. The lower intake of protein with the ration produced an unfavourable effect on the respiratory activity of the intestinal mucosa. The birds of group III showed considerable disturbances in the ultrastructure of enterocytes. Discussed is the relation between the amount of dietary protein and the changes in the cAMP content and the 35S-thiamine absorption in the small intestine.
用45只雄性肉鸡进行了一项实验，将它们分为三组：第一组（对照组），给予含22.16%蛋白质的全日粮；第二组，给予含18.12%蛋白质的日粮；第三组，饲喂含14.14%蛋白质的日粮。这些鸡在35日龄前一直给予各自的日粮混合物。结果发现，与对照组相比，蛋白质含量最低的处理组对35S-硫胺素的吸收明显较低。日粮蛋白质摄入量较低（第二组和第三组）对硫胺素磷酸盐以及肝脏中的总硫胺素和游离硫胺素产生了负面影响。蛋白质缺乏导致空肠黏膜和肝脏组织中环状腺苷3',5'-单磷酸可靠下降。日粮中蛋白质摄入量较低对肠黏膜的呼吸活性产生了不利影响。第三组的鸡在肠细胞超微结构上表现出相当大的紊乱。讨论了日粮蛋白质含量与小肠中cAMP含量变化和35S-硫胺素吸收之间的关系。
