Pulmonary mechanics and lung histology in acute lung injury induced by Bothrops jararaca venom |
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| Authors: | Silveira Keyla S O Boechem Nicolau T do Nascimento Suliane M Murakami Yugo L B Barboza Ana P B Melo Paulo A Castro Paulo de Moraes Vera L G Rocco Patricia R M Zin Walter A |
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| Affiliation: | 1. Laboratory of Respiration Physiology, Carlos Chagas Filho Biophysics Institute, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil;2. Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil;3. Department of Basic and Clinical Pharmacology, Federal University of Rio de Janeiro, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil;4. Department of Medical Biochemistry, Federal University of Rio de Janeiro, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil |
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| Abstract: | Pulmonary mechanics [static (Est) and dynamic (Edyn) elastances, resistive (DeltaP1) and viscoelastic pressures (DeltaP2)], histology, and bronchoalveolar lavage fluid (BALF) from BALB/c mice were analysed 1, 24, 48 and 72 h after intravenous injection of saline or Bothrops jararaca crude venom [0.3 (V0.3) or 1 (V1) microg.g(-1)]. Est, Edyn, and DeltaP2 increased at 1 h in both V groups, being significantly higher in V1 than in V0.3, decreasing progressively, reaching control values at 48 h in V0.3, but remaining altered in V1 at 72 h. DeltaP1 augmented in V1 at 1 h, returning to normal at 72 h. Histological changes in V0.3 group included interstitial oedema, alveolar collapse, and increased cellularity, which returned to normal at 48 h. These changes were more intense in V1 group, with alveolar oedema and haemorrhage. BALF showed time-dependent neutrophil influx in V0.3. In conclusion, venom led to time- and dose-dependent pulmonary mechanical changes, together with moderate inflammation in V0.3 and acute lung injury in V1. |
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| Keywords: | Bronchi broncho-alveolar lavage Disease acute lung injury, inflammation Mammals mouse Mechanics of breathing elastance, pressure Pressure resistive, viscoelastic Venom Corresponding author. Tel.: +55-21-2564-1578 fax: +55-21-2280-8193. |
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