Interaction of aspirin (acetylsalicylic acid) with lipid membranes.

Interaction of aspirin (acetylsalicylic acid) with lipid membranes.
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DOI:
10.1371/journal.pone.0034357
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Rheinstädter MC
Rheinstädter MC
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Barrett MA;Zheng S;Roshankar G;Alsop RJ;Belanger RK;Huynh C;Kučerka N;Rheinstädter MC

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We studied the interaction of Aspirin (acetylsalicylic acid) with lipid membranes using x-ray diffraction for bilayers containing up to 50 mol% of aspirin. From 2D x-ray intensity maps that cover large areas of reciprocal space we determined the position of the ASA molecules in the phospholipid bilayers and the molecular arrangement of the molecules in the plane of the membranes. We present direct experimental evidence that ASA molecules participate in saturated lipid bilayers of DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine) and preferably reside in the head group region of the membrane. Up to 50 mol% ASA molecules can be dissolved in this type of bilayer before the lateral membrane organization is disturbed and the membranes are found to form an ordered, 2D crystal-like structure. Furthermore, ASA and cholesterol were found to co-exist in saturated lipid bilayers, with the ASA molecules residing in the head group region and the cholesterol molecules participating in the hydrophobic membrane core.
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