Oxidative and proteolysis-related parameters of skeletal muscle from hamsters with experimental pulmonary emphysema: a comparison between papain and elastase induction
| Autor: | Rubens Cecchini, Cláudia Roberta Brunnquell, Nichelle Antunes Vieira, Felipe Sczepanski, Flávia Alessandra Guarnier, Alessandra Lourenço Cecchini, Laís Roberta Sábio |
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| Rok vydání: | 2015 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Pulmonary emphysema Proteolysis Muscle Proteins Oxidative phosphorylation medicine.disease_cause Pathology and Forensic Medicine law.invention Protein Carbonylation chemistry.chemical_compound law Internal medicine Papain medicine Animals Muscle Skeletal Lung Molecular Biology Chemiluminescence Mesocricetus Pancreatic Elastase medicine.diagnostic_test Elastase Skeletal muscle Original Articles Organ Size Cell Biology Adaptation Physiological Disease Models Animal Oxidative Stress medicine.anatomical_structure Endocrinology Pulmonary Emphysema chemistry Biochemistry Oxidation-Reduction Biomarkers Oxidative stress |
| Zdroj: | International Journal of Experimental Pathology. 96:140-150 |
| ISSN: | 0959-9673 |
| DOI: | 10.1111/iep.12121 |
| Popis: | The objective of this study was to investigate whether emphysema induced by elastase or papain triggers the same effects on skeletal muscle, related to oxidative stress and proteolysis, in hamsters. For this purpose, we evaluated pulmonary lesions, body weight, muscle loss, oxidative stress (thiobarbituric acid-reactive substances, total and oxidized glutathiones, chemiluminescence stimulated by tert-butyl hydroperoxide and carbonyl proteins), chymotrypsin-like and calpain-like proteolytic activities and muscle fibre cross-sectional area in the gastrocnemius muscles of emphysemic hamsters. Two groups of animals received different intratracheal inductions of experimental emphysema: by 40 mg/ml papain (EP) or 5.2 IU/100 g animal (EE) elastase (n = 10 animals/group). The control group received intratracheal instillation of 300 μl sterile NaCl 0.9%. Compared with the control group, the EP group had reduced muscle weight (18.34%) and the EE group had increased muscle weight (8.37%). Additionally, tert-butyl hydroperoxide-initiated chemiluminescence, carbonylated proteins and chymotrypsin-like proteolytic activity were all elevated in the EP group compared to the CS group, while total glutathione was decreased compared to the EE group. The EE group showed more fibres with increased cross-sectional areas and increased calpain-like activity. Together, these data show that elastase and papain, when used to induce experimental models of emphysema, lead to different speeds and types of adaptation. These findings provide more information on choosing a suitable experimental model for studying skeletal muscle adaptations in emphysema. |
| Databáze: | OpenAIRE |
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