コレステロールがリン脂質膜とアミトリプチリンの相互作用に与える役割：ラングミュア単分子膜およびSAXS解析による検討
This study examined how amitriptyline hydrochloride (AMT), a tricyclic antidepressant, interacts with lipid membranes composed of brain sphingomyelin (BSM) and cholesterol (Chol). Langmuir monolayer experiments and small-angle X-ray scattering (SAXS) analyses were employed to characterize changes in membrane rigidity, packing density, surface potential, and structural parameters upon AMT incorporation. Cholesterol was found to increase membrane hydrophobicity and structural stability while simultaneously amplifying AMT-induced membrane perturbations. SAXS data revealed that AMT integration thickens the lipid bilayer and narrows the interlamellar water layer, indicating alterations in both inter- and intramolecular hydrogen bonding networks. These observations offer mechanistic insight into how antidepressant molecules interact with cholesterol-enriched biomimetic brain membranes, with potential implications for rational drug molecule design.
AMT incorporation into BSM/cholesterol bilayers increases bilayer thickness and reduces the interlamellar water layer, disrupting hydrogen bonding networks. Cholesterol enhances membrane hydrophobicity and structural stability, thereby amplifying the membrane-perturbing effects of AMT.
This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/40492616