Pulmonary mechanics and lung histology in acute lung injury induced by Bothrops jararaca venom.
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.
Silveira
Keyla S O
KS
Laboratory of Respiration Physiology, Carlos Chagas Filho Biophysics Institute, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil.
Boechem
Nicolau T
NT
do Nascimento
Suliane M
SM
Murakami
Yugo L B
YL
Barboza
Ana P B
AP
Melo
Paulo A
PA
Castro
Paulo
P
de Moraes
Vera L G
VL
Rocco
Patricia R M
PR
Zin
Walter A
WA
D000818:Animals; D017837:Bothrops / Q000378:metabolism; D001992:Bronchoalveolar Lavage Fluid; D002452:Cell Count; D003435:Crotalid Venoms / Q000633:toxicity*; D006653:Histology; D051379:Mice; D008807:Mice, Inbred BALB C; D012128:Respiratory Distress Syndrome / Q000473:pathology / Q000503:physiopathology; D015656:Respiratory Mechanics / Q000187:drug effects*; D013997:Time Factors
D003435:Crotalid Venoms