scholarly journals Connecting wettability, topography, and chemistry in a simple lipid-montmorillonite system

2019 ◽  
Vol 555 ◽  
pp. 498-508 ◽  
Author(s):  
Brenda L. Kessenich ◽  
Nihit Pokhrel ◽  
Elias Nakouzi ◽  
Christina J. Newcomb ◽  
Markus Flury ◽  
...  
Keyword(s):  
Marine Drugs ◽  
2020 ◽  
Vol 18 (2) ◽  
pp. 125 ◽  
Author(s):  
Martin Jakubec ◽  
Christian Totland ◽  
Frode Rise ◽  
Elahe Jafari Chamgordani ◽  
Britt Paulsen ◽  
...  

Marine sponges and soft corals have yielded novel compounds with antineoplastic and antimicrobial activities. Their mechanisms of action are poorly understood, and in most cases, little relevant experimental evidence is available on this topic. In the present study, we investigated whether agelasine D (compound 1) and three agelasine analogs (compound 2–4) as well as malonganenone J (compound 5), affect the physical properties of a simple lipid model system, consisting of dioleoylphospahtidylcholine and dioleoylphosphatidylethanolamine. The data indicated that all the tested compounds increased stored curvature elastic stress, and therefore, tend to deform the bilayer which occurs without a reduction in the packing stress of the hexagonal phase. Furthermore, lower concentrations (1%) appear to have a more pronounced effect than higher ones (5–10%). For compounds 4 and 5, this effect is also reflected in phospholipid headgroup mobility assessed using 31P chemical shift anisotropy (CSA) values of the lamellar phases. Among the compounds tested, compound 4 stands out with respect to its effects on the membrane model systems, which matches its efficacy against a broad spectrum of pathogens. Future work that aims to increase the pharmacological usefulness of these compounds could benefit from taking into account the compound effects on the fluid lamellar phase at low concentrations.


2008 ◽  
Vol 50 (Supplement) ◽  
pp. S299-S304 ◽  
Author(s):  
Robert V. Stahelin

1971 ◽  
Vol 48 (3) ◽  
pp. 533-541 ◽  
Author(s):  
Hilton H. Mollenhauer ◽  
Clara Totten

Two structurally distinct lipid vesicles are present in pea and bean cotyledons during the first few days of germination. Both were isolated by sucrose density gradient centrifugation without significant morphological changes. Lipid vesicles of one type were elongated into a sausage-like or flattened-saccular shape, and were interassociated into sheets which were usually one vesicle thick. These sheets remained intact during homogenization and centrifugation, because some of the lipid vesicles in the sheet were interconnected through their bounding membranes, and because there seemed to be a bonding substance between adjacent vesicles. These vesicles were called "composite" lipid vesicles to distinguish them from the more usual, or "simple," lipid vesicles of other plant and animal tissues. Lipid vesicles of the other type were usually larger than the composite lipid vesicles and were always spherical in form. These vesicles remained single and did not interassociate into sheets. They were probably equivalent to the simple lipid vesicles of other tissues.


2007 ◽  
Vol 8 (1) ◽  
pp. 38-39
Author(s):  
V. Tsimihodimos ◽  
I. Gazi ◽  
M. Kalogirou ◽  
A.D. Tselepis ◽  
M. Elisaf

2016 ◽  
Vol 196 ◽  
pp. 76-80 ◽  
Author(s):  
John F. Nagle ◽  
Michael S. Jablin ◽  
Stephanie Tristram-Nagle
Keyword(s):  

2015 ◽  
Vol 185 ◽  
pp. 3-10 ◽  
Author(s):  
John F. Nagle ◽  
Michael S. Jablin ◽  
Stephanie Tristram-Nagle ◽  
Kiyotaka Akabori

1981 ◽  
Vol 13 (1) ◽  
pp. 63-71 ◽  
Author(s):  
L. Dux ◽  
Magda G. M�sz�ros ◽  
J. Roh�n ◽  
L. Gajdos ◽  
Gy�rg Yi Jakab ◽  
...  

2021 ◽  
Vol 22 (12) ◽  
pp. 6547
Author(s):  
Luka Šturm ◽  
Nataša Poklar Ulrih

Studying the interactions between lipid membranes and various bioactive molecules (e.g., polyphenols) is important for determining the effects they can have on the functionality of lipid bilayers. This knowledge allows us to use the chosen compounds as potential inhibitors of bacterial and cancer cells, for elimination of viruses, or simply for keeping our healthy cells in good condition. As studying those effect can be exceedingly difficult on living cells, model lipid membranes, such as liposomes, can be used instead. Liposomal bilayer systems represent the most basic platform for studying those interactions, as they are simple, quite easy to prepare and relatively stable. They are especially useful for investigating the effects of bioactive compounds on the structure and kinetics of simple lipid membranes. In this review, we have described the most basic methods available for preparation of liposomes, as well as the essential techniques for studying the effects of bioactive compounds on those liposomes. Additionally, we have provided details for an easy laboratory implementation of some of the described methods, which should prove useful especially to those relatively new on this research field.


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