Kapoor Gaurav, Banyal Harjeet Singh
Laboratory of Parasitology and Immunology, Department of Biosciences, Himachal Pradesh University, Shimla 171005, India.
Korean J Parasitol. 2009 Dec;47(4):421-4. doi: 10.3347/kjp.2009.47.4.421. Epub 2009 Dec 1.
Malaria parasites adapt to the oxidative stress during their erythrocytic stages with the help of vital thioredoxin redox system and glutathione redox system. Glutathione reductase and thioredoxin reductase are important enzymes of these redox systems that help parasites to maintain an adequate intracellular redox environment. In the present study, activities of glutathione reductase and thioredoxin reductase were investigated in normal and Plasmodium berghei-infected mice red blood cells and their fractions. Activities of glutathione reductase and thioredoxin reductase in P. berghei-infected host erythrocytes were found to be higher than those in normal host cells. These enzymes were mainly confined to the cytosolic part of cell-free P. berghei. Full characterization and understanding of these enzymes may promise advances in chemotherapy of malaria.
疟原虫在其红细胞阶段借助重要的硫氧还蛋白氧化还原系统和谷胱甘肽氧化还原系统来适应氧化应激。谷胱甘肽还原酶和硫氧还蛋白还原酶是这些氧化还原系统的重要酶类,有助于疟原虫维持适当的细胞内氧化还原环境。在本研究中,对正常和感染伯氏疟原虫的小鼠红细胞及其组分中的谷胱甘肽还原酶和硫氧还蛋白还原酶活性进行了研究。发现感染伯氏疟原虫的宿主红细胞中谷胱甘肽还原酶和硫氧还蛋白还原酶的活性高于正常宿主细胞中的活性。这些酶主要局限于无细胞伯氏疟原虫的胞质部分。对这些酶的全面表征和理解可能为疟疾化疗带来进展。