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
复制
发表时间:
2018
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
通讯作者:
Zasadzinski, Joseph A.
Zasadzinski, Joseph A.
中科院分区:
--
文献类型:
--
作者:
Sachan, Amit Kumar;Zasadzinski, Joseph A.

文献摘要

参考文献

被引文献

相似文献

表面活性剂单分子膜的形态通常在朗缪尔槽的平坦表面上进行研究,即使大多数生理界面在微米尺度上是弯曲的。在这里,我们表明,随着临床肺表面活性物质单层覆盖的气泡的半径减小到100 µm,单层形态从连续液体膨胀(LE)基质中的分散圆形液体冷凝(LC)域变为分离不连续LE域的连续LC线性网格。曲率相关的形态转变不能很容易地解释目前的液晶理论的基础上各向同性域。这可能是由于饱和磷脂的LC相的各向异性弯曲能,这是所有天然和临床肺表面活性剂所共有的。这种连续的LC线性网格形态也存在于溶液中的双层囊泡上。表面活性剂的吸附和结晶模量也强烈影响的形态变化引起的界面曲率。形态和动力学的变化可能对肺的稳定性和功能产生生理影响,因为形态转变发生在肺泡尺寸处。
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.
DOI: 10.1021/j100326a053
发表时间: 1988-07-28
影响因子: --
作者:
MCCONNELL, HM;MOY, VT
通讯作者: MOY, VT
DOI: 10.1126/science.8134836
发表时间: 1994-03
期刊: Science
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
肺表面活性蛋白 SP-B 的功能。
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
DOI: 10.1021/nl303928m
发表时间: 2013
期刊: Nano letters
影响因子: 10.8
作者:
A.K. Sachan;H.-J. Galla
通讯作者: H.-J. Galla
DOI: 10.1021/j100389a022
发表时间: 1990-12-27
影响因子: --
作者:
MCCONNELL, HM;RICE, PA;BENVEGNU, DJ
通讯作者: BENVEGNU, DJ