Chapter 13 Transmembrane Polarity Profile of Lipid Membranes

Noethig-Laslo, Vesna; Šentjurc, Marjeta

doi:10.1016/s1554-4516(06)05013-7

Cited by 7 publications

(17 citation statements)

References 89 publications

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“…However, it has been shown that the cell membrane of A. pernix and liposomes prepared solely from these C 25,25 lipids, known as archaeosomes, have some unique properties [6,7]. We have shown that archeosomes made of C 25,25 lipids do not show the typical gel-to-liquid crystalline transition in the temperature range from 0 °C to 100 °C, and that they are stable in a pH range from 4 to 12. Additionally, our data have indicated that archaeosomes in the pH range from 4 to 12 release less than 27% of entrapped calcein after during incubation for 10 h at 90 °C.…”

Section: Introductionmentioning

confidence: 85%

“…Very recently, we showed that even 5 mol% C 25,25 lipids in mixed C 25,25 -dipalmitoyl-L-α-phosphatidylcholine (DPPC) liposomes drastically influences the phase transition of liposomes. However, the low content of C 25,25 lipids in these mixed liposomes stabilizes them against releasing entrapped calcein at temperatures above the phase transition of DPPC [8].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…However, the low content of C 25,25 lipids in these mixed liposomes stabilizes them against releasing entrapped calcein at temperatures above the phase transition of DPPC [8].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…The cell membrane of the hyperthermophilic archaeon Aeropyrum pernix K1 is comprised of only two major polar lipids. The core lipid consists solely of C 25,25 -archaeol (2,3-di-sesterpanyl-sn-glycerol). C 25-25 -archaetidyl(glucosyl)inositol (AGI), with its glucosylinositol polar head-group accounts for 91 mol%, with C 25,25 -archaetidylinositol (AI) with its myoinositol polar head-group, accounts for 9 mol% [1].…”

Section: Introductionmentioning

confidence: 99%

“…The unique structures and properties of bipolar tetraether lipids have been extensively studied [4,5]. However, it has been shown that the cell membrane of A. pernix and liposomes prepared solely from these C 25,25 lipids, known as archaeosomes, have some unique properties [6,7]. We have shown that archeosomes made of C 25,25 lipids do not show the typical gel-to-liquid crystalline transition in the temperature range from 0 °C to 100 °C, and that they are stable in a pH range from 4 to 12.…”

Section: Introductionmentioning

confidence: 99%

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Structural characterization of liposomes made of diether archaeal lipids and dipalmitoyl-L-α-phosphatidylcholine

Gmajner¹,

Grabnar²,

Žnidarič³

et al. 2011

Biophysical Chemistry

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Section: Introductionmentioning

confidence: 85%

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…However, the low content of C 25,25 lipids in these mixed liposomes stabilizes them against releasing entrapped calcein at temperatures above the phase transition of DPPC [8].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structural characterization of liposomes made of diether archaeal lipids and dipalmitoyl-L-α-phosphatidylcholine

Gmajner¹,

Grabnar²,

Žnidarič³

et al. 2011

Biophysical Chemistry

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Environment-sensitive quinolone demonstrating long-lived fluorescence and unusually slow excited-state intramolecular proton transfer kinetics

Zamotaiev

Shvadchak

Sych

et al. 2016

Methods Appl. Fluoresc.

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A new small fluorescent dye based on 3-hydroxybenzo[g]quinolone, a benzo-analogue of Pseudomonas quinolone signal species, has been synthesized. The dye demonstrates interesting optical properties, with absorption in the visible region, two band emission due to an excited-state intramolecular proton transfer (ESIPT) reaction and high fluorescence quantum yield in both protic and aprotic media. Time-resolved fluorescence spectroscopy shows that the ESIPT reaction time is unusually long (up to 8 ns), indicating that both forward and backward ESIPT reactions are very slow in comparison to other 3-hydroxyquinolones. In spite of these slow rate constants, the ESIPT reaction was found to show a reversible character as a result of the very long lifetimes of both N and T forms (up to 16 ns). The ESIPT reaction rate is mainly controlled by the hydrogen bond donor ability in protic solvents and the polarity in aprotic solvents. Using large unilamellar vesicles and giant unilamellar vesicles of different lipid compositions, the probe was shown to preferentially label liquid disordered phases.

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Changes in cell membranes of white blood cells treated with a common food additive E407a

Tkachenko

Onishchenko

Posokhov

et al. 2021

Turkish Journal of Biochemistry

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Objectives To estimate the state of phospholipid bilayer of rats WBCs exposed to a common food additive E407a, which is used as a thickener and emulsifier, during 4 h using a fluorescent probe − ortho-hydroxy derivative of 2,5-diaryl-1,3-oxazole. Materials and methods Steady-state fluorescence spectroscopy: a study by the environment-sensitive fluores-cent probe − 2-(2′-hydroxy-phenyl)-5-phenyl-1,3-oxazole (probe O1O). Results Changes are detected in the spectra of the fluorescent probe bound to rat WBCs treated with the solutions of E407a of various concentrations in comparison with the corresponding spectra of the probe incubated with the untreated leukocytes. The decrease in polarity and proton-donor ability is observed in the lipid membranes of leukocytes in the region, where the probe locates. Conclusions Our findings suggest a higher dehydration of leukocyte membranes of rats treated with a common food additive E407a at high concentrations and, thus, indicate that exposure to high doses of E407a leads to the increase in the lipid order (i.e. to decrease in fluidity) of the membranes of rat WBCs.

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Chapter 13 Transmembrane Polarity Profile of Lipid Membranes

Cited by 7 publications

References 89 publications

Structural characterization of liposomes made of diether archaeal lipids and dipalmitoyl-L-α-phosphatidylcholine

Structural characterization of liposomes made of diether archaeal lipids and dipalmitoyl-L-α-phosphatidylcholine

Environment-sensitive quinolone demonstrating long-lived fluorescence and unusually slow excited-state intramolecular proton transfer kinetics

Changes in cell membranes of white blood cells treated with a common food additive E407a

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