Analysis of mitochondrial enzymatic activity in blood lymphomonocyte fractions during infection with different Trypanosoma cruzi strains

• Published in: Revista do Instituto de Medicina Tropical de São Paulo Vol. 62; pp. e15 - 6
• Main Authors: Báez, Alejandra L, Lo Presti, María S, Bazán, Paola C, Strauss, Mariana, Velázquez López, Daniela A, Miler, Noemí, Rivarola, Héctor W, Paglini-Oliva, Patricia A
• Format: Journal Article
• Language: English
• Published: Brazil Instituto de Medicina Tropical de Sao Paulo 01.01.2020; Instituto de Medicina Tropical; Instituto de Medicina Tropical de São Paulo; Universidade de São Paulo (USP)
• Subjects: Animals; Chagas disease; Chagas Disease - enzymology; Chagas Disease - metabolism; Chagas Disease - physiopathology; Citrate (si)-Synthase - metabolism; Disease Models, Animal; Disease Progression; Electron Transport Complex IV - metabolism; Krebs cycle; Lymphomonocyte fraction; Male; Mitochondria; Mitochondria - enzymology; Mitochondria - parasitology; Mitochondria - pathology; Original; Parasitemia; Respiratory chain; TROPICAL MEDICINE; Chagas disease; Lymphomonocyte fraction; Mitochondria; Respiratory chain; Krebs cycle
• ISSN: 1678-9946; 0036-4665; 1678-9946
• DOI: 10.1590/s1678-9946202062015

Proinflammatory and inflammatory mediators induced by Trypanosoma cruzi infection increase the oxidative stress, generating toxicity for cells targeting mitochondria of different tissues. We studied the activity of citrate synthase and complexes I-IV of respiratory chain in mitochondria of blood lymphomonocyte fraction, from albino Swiss mice infected with different isolates of T. cruzi , during Chagas disease evolution. Complexes I-IV were modified in infected groups (p<0.05) in all the stages, and an inflammatory process of different magnitudes was detected in the heart and skeletal muscle according to the isolate. The citrate synthase activity presented modifications in the SGO Z12 and the Tulahuen group (p<0.05). Hearts showed fiber fragmentation and fibrosis; skeletal muscle presented inflammatory infiltrates and in the Tulahuen infected group, there were also amastigote nests. The inflammatory processes produced an oxidative stress that induced different alterations of mitochondrial enzymes activities in the lymphomonocyte fraction that can be detected by a simple blood extraction, suggesting that they could be used as disease markers, especially in the indeterminate phase of Chagas disease.