Varying exposure regimes to long term chronic intermittent hypoxia exert different outcomes and morphological effects on Wistar rats at 4600 m
| Autor: | Patricia Siques, Teresa Barlaro, Julio Brito, Juan J. de la Cruz, Fabiola León-Velarde, Rafael Herruzo, Vasthi Lopez |
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| Rok vydání: | 2008 |
| Předmět: |
Lung
business.industry Health Toxicology and Mutagenesis Hypoxia (medical) medicine.disease Pulmonary edema Pollution medicine.anatomical_structure Right ventricular hypertrophy Ventricle Edema Anesthesia Hypobaric chamber medicine Environmental Chemistry Pulmonary hemorrhage medicine.symptom business |
| Zdroj: | Toxicological & Environmental Chemistry. 90:169-179 |
| ISSN: | 1029-0486 0277-2248 |
| DOI: | 10.1080/02772240701382206 |
| Popis: | The aim of this study was to compare differences in morphological effects following two regimens of simulated chronic intermittent hypoxia (4600 m) during 12 months, compared to chronic hypoxia and normoxia. Male Wistar rats were randomly assigned to four groups: Chronic intermittent hypoxia (CIH) 2 × 2 (2 days hypoxia, 2 days normoxia, n = 50), CIH4 × 4 (4 days hypoxia, 4 days normoxia, n =50), chronic hypoxia (CH) (permanent, n = 28) and control (NX) (normoxia, n = 24). Hypoxia was simulated in a hypobaric chamber (428 torr). The following parameters were assessed: ventricle wall thickness, presence of congestion, edema, hemorrhage, thrombosis, necrosis, and renal casts. In general, mortality was significantly associated with heart congestion, pulmonary edema, pulmonary hemorrhage, and liver necrosis. Intermittent as well as chronic exposure produced a common pattern of manifestations in all organs, with varying severity and time of occurrence. Right ventricle hypertrophy was observed in CIH2 × 2 and CI... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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