NDLI: Amiodarone interactions with membrane lipids and with growth of Bacillus stearothermophilus used as a model

Content Provider	Springer Nature Link
Author	Rosa, Sónia M. L. J. Antunes Madeira, Maria C. Jurado, Amália S. Madeira, Vítor V. M. C.
Copyright Year	2000
Abstract	The thermophilic eubacterium Bacillus stearothermophilus was used as a model to study the effects of amiodarone (2-butyl-3-[3′,5′diido-4′α-diethyl-aminoethoxybenzoyl]-benzofuran) in lipid organization and in bacterial growth. Effects on the structural order of lipids were assessed by fluorescence polarization of 1,6-diphenyl-1,3,5-hexatriene (DPH), probing the bilayer core, and of the propionic acid derivative 3-[p-(6-phenyl)-1,3,5-hexatrienyl] phenylpropionic acid (DPH-PA), probing the outer regions of the bilayer. Amiodarone fluidizes bacterial polar lipid bilayers for temperatures below the phase transition midpoint, and orders the fluid phase of the bacterial polar lipids, as evaluated by DPH and DPH-PA. The ordering and disordering effects, which are concentration dependent, are more extensive when detected by DPH relative to DPH-PA. Growth studies performed in parallel revealed that amiodarone inhibits bacterial growth as a function of concentration. Amiodarone concentrations in the range from 1 to 2.5 µM increased the lag time, decreased the specific growth rate, and decreased the final cell density. Furthermore, 3 µM amiodarone completely inhibited growth. These in vivo effects of amiodarone can be related to its ability to perturb the phospholipid bilayer structure, whose integrity is essential for cell function, viability, and growth.
Starting Page	165
Ending Page	175
Page Count	11
File Format	PDF
ISSN	02732289
Journal	Applied Biochemistry and Biotechnology
Volume Number	87
Issue Number	3
e-ISSN	15590291
Language	English
Publisher	Humana Press
Publisher Date	2000-01-01
Publisher Place	Totowa
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biotechnology Biochemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Environmental Engineering Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology

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