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KMID : 0191119980130020123
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Journal of Korean Medical Science
1998 Volume.13 No. 2 p.123 ~ p.130
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In vitro inhibition of biophysical surface properties and change in ultrastructures of exogenous pulmonary surfactant by albumin or fibrinogen
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Park J
Bae CW/Choi YM
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Abstract
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In order to observe the effects of serum albumin and fibrinogen on biophysical surface properties and the
morphology of pulmonary surfactant in vitro, we measured the surface adsorption rate, dynamic minimum and
maximum surface tension (min-, max-ST) by Pulsating Bubble Surfactometer, and demonstrated ultrastructures
on a series of mixtures with varying concentrations of albumin or fibrinogen and Surfactant-TA. The albumin
and fibrinogen significantly inhibited the adsorption rate and ST-lowering properties of surfactant through
increasing STs of adsorption rate, min-ST, and max-ST. The characteristic morphology of the Surfactant-TA
changed from lamellar rod-like structure with open ends into spherical structures with loss of their open
ends by mixing with albumin or fibrinogen. These inhibitory effects of albumin and fibrinogen on surface
properties of surfactant were dependent upon the increasing concentration of albumin or fibrinogen. We
concluded that albumin and fibrinogen significantly altered surfactant function and its ultrastructural
morphology in vitro. These findings support the concept that albumin and fibrinogen-induced surfactant
dysfunction may play an important role in the pathophysiology of adult respiratory distress syndrome,
and this adverse effect of albumin and fibrinogen on surfactant might be overcome by administration of
large doses of exogenous surfactant.
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