复配蛋白粉对大鼠氮代谢及生理生化指标影响研究

Effects of compound protein powder on nitrogen metabolism and physiological and biochemical indexes in rats

目的探究不同来源复配蛋白粉的营养功效。方法选择大豆蛋白、乳清蛋白和酵母蛋白三种优质蛋白质为原料,通过科学复配得到三组复配蛋白粉配方,并评价了复配蛋白粉对大鼠氮代谢指标、血清生化指标、肝脏组织和附睾脂肪病理学变化等的影响。结果相比于对照组(酪蛋白),复配蛋白粉在大鼠体内的净蛋白利用率、生物学评价和蛋白质功效比等指标显著提高,且乳清蛋白含量高的配方三组这些指标变化更加明显;复配蛋白粉能够有效提高大鼠白蛋白和球蛋白水平,降低总胆固醇含量,表现出了更好的改善免疫和控制脂代谢作用,其中配方二组最佳;肝脏组织和附睾脂肪病理染色结果表明,三组复配蛋白粉不会对这些组织产生不良影响。结论明确了三种不同来源复配蛋白粉的营养功效,有望促进其在老年人、运动人群等特定营养需求人群中的应用。

Objective To explore the nutritional efficacy of compound protein powder formulations from different sources.Methods Three groups of compound protein powder formulations were obtained through scientific blending using soy protein,whey protein and yeast protein as raw materials.The effects of the compound protein powders on nitrogen metabolism,serum biochemical indicators,and pathological changes of liver tissue and epididymal fat in rats were evaluated.Results Compared with the control(casein),the net protein utilization,biological evaluation,and protein efficacy ratio of the compound protein powders in rats were significantly improved,and the changes in these indicators in the formula with the highest whey protein content were most significant among all three formulas.The compound protein powders effectively increased the levels of albumin and globulin,while decreased the content of total cholesterol,indicating beneficial effects on improving immunity and controlling lipid metabolism,with the formula group 2 being the most effective among all three groups.The pathological examination showed that the three groups of protein powder did not have adverse effects on liver tissue and epididymal fat.Conclusion The present study demonstrates that the compound protein powder formulation has nutritional value,which suggests a potential of the application of the compound protein powder formulation in the elderly,and people with special nutritional needs,such as sports people.