Interfacial curvature effects on the monolayer morphology and dynamics of a clinical lung surfactant
Interfacial curvature effects on the monolayer morphology and dynamics of a clinical lung surfactant
复制标题
界面曲率对临床肺表面活性剂单层形态和动力学的影响
DOI:
10.1073/pnas.1715830115
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Zasadzinski, Joseph A.
中科院分区:
文献类型:
--
作者:
Sachan, Amit Kumar;Zasadzinski, Joseph A.
The morphology of surfactant monolayers is typically studied on the planar surface of a Langmuir trough, even though most physiological interfaces are curved at the micrometer scale. Here, we show that, as the radius of a clinical lung surfactant monolayer-covered bubble decreases to ∼100 µm, the monolayer morphology changes from dispersed circular liquid-condensed (LC) domains in a continuous liquid-expanded (LE) matrix to a continuous LC linear mesh separating discontinuous LE domains. The curvature-associated morphological transition cannot be readily explained by current liquid crystal theories based on isotropic domains. It is likely due to the anisotropic bending energy of the LC phase of the saturated phospholipids that are common to all natural and clinical lung surfactants. This continuous LC linear mesh morphology is also present on bilayer vesicles in solution. Surfactant adsorption and the dilatational modulus are also strongly influenced by the changes in morphology induced by interfacial curvature. The changes in morphology and dynamics may have physiological consequences for lung stability and function as the morphological transition occurs at alveolar dimensions.
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影响因子:
--
作者:
MCCONNELL, HM;MOY, VT
通讯作者:
MOY, VT
影响因子:
56.9
作者:
J. Zasadzinski;R. Viswanathan;L. Madsen;J. Garnæs;D. K. Schwartz
通讯作者:
J. Zasadzinski;R. Viswanathan;L. Madsen;J. Garnæs;D. K. Schwartz
DOI:
10.1126/science.8332910
发表时间:
1993
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Longo,ML;Bisagno,AM;Zasadzinski,JA;Bruni,R;Waring,AJ
通讯作者:
Waring,AJ
影响因子:
10.8
作者:
A.K. Sachan;H.-J. Galla
通讯作者:
H.-J. Galla
影响因子:
--
作者:
MCCONNELL, HM;RICE, PA;BENVEGNU, DJ
通讯作者:
BENVEGNU, DJ