Visualization of lipid domains in giant unilamellar vesicles using an environment-sensitive membrane probe based on 3-hydroxyflavone.
Authors:Klymchenko AS, Oncul S, Didier P, Schaub E, Bagatolli L, Duportail G, Mély Y,
Journal:Biochim Biophys Acta
PubMed ID:19027712
'We characterized the recently introduced environment-sensitive fluorescent membrane probe based on 3-hydroxyflavone, F2N12S, in model lipid membranes displaying liquid disordered (Ld) phase, liquid ordered (Lo) phase, or their coexistence. Steady-state fluorescence studies in large unilamellar vesicles show that the probe dual emission drastically changes with the lipid bilayer phase, which ... More
Monitoring biophysical properties of lipid membranes by environment-sensitive fluorescent probes.
Authors:Demchenko AP, Mély Y, Duportail G, Klymchenko AS,
Journal:Biophys J
PubMed ID:19413953
We review the main trends in the development of fluorescence probes to obtain information about the structure, dynamics, and interactions in biomembranes. These probes are efficient for studying the microscopic analogs of viscosity, polarity, and hydration, as well as the molecular order, environment relaxation, and electrostatic potentials at the sites ... More
Excited state proton transfer and solvent relaxation of a 3-hydroxyflavone probe in lipid bilayers.
Authors:Das R, Klymchenko AS, Duportail G, Mély Y,
Journal:J Phys Chem B
PubMed ID:18729506
The photophysics of a ratiometric fluorescent probe, N-[[4'- N, N-diethylamino-3-hydroxy-6-flavonyl]methyl]- N-methyl- N-(3-sulfopropyl)-1-dodecanaminium, inner salt (F2N12S), incorporated into phospholipid unilamellar vesicles is presented. The reconstructed time-resolved emission spectra (TRES) unravels a unique feature in the photophysics of this probe. TRES exhibit signatures of both an excited-state intramolecular proton transfer (ESIPT) and ... More
Fluorescent biomembrane probe for ratiometric detection of apoptosis.
Authors:Shynkar VV, Klymchenko AS, Kunzelmann C, Duportail G, Muller CD, Demchenko AP, Freyssinet JM, Mely Y,
Journal:J Am Chem Soc
PubMed ID:17256940
Herein, we developed the first ratiometric fluorescent probe for apoptosis detection. This probe incorporates selectively into the outer leaflet of the cell plasma membrane and senses the loss of the plasma membrane asymmetry occurring during the early steps of apoptosis. The high specificity to the plasma membranes was achieved by ... More
Death receptor 5 is activated by fucosylation in colon cancer cells.
Authors:Zhang B, van Roosmalen IAM, Reis CR, Setroikromo R, Quax WJ
Journal:FEBS J
PubMed ID:30589515
'The remarkable pro-apoptotic properties of tumour necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) have led to considerable interest in this protein as a potential anticancer therapeutic. However, TRAIL is largely ineffective in inducing apoptosis in certain cancer cells, and the mechanisms underlying this selectivity are unknown. In colon adenocarcinomas, posttranslational modifications ... More