TAILIEUCHUNG - Báo cáo y học: " ESR and NMR studies provide evidence that phosphatidyl glycerol specifically interacts with poxvirus membranes Jean-Claude D"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: ESR and NMR studies provide evidence that phosphatidyl glycerol specifically interacts with poxvirus membranes Jean-Claude D | Debouzy et al. Virology Journal 2010 7 379 http content 7 1 379 J VIROLOGY JOURNAL RESEARCH Open Access ESR and NMR studies provide evidence that phosphatidyl glycerol specifically interacts with poxvirus membranes 1 P s I z- 1 2 2 Jean-Claude Debouzy David Crouzier Anne-Laure Favier Julien Perino Abstract Background The lung would be the first organ targeted in case of the use of Variola virus the causative agent of smallpox as a bioweapon. Pulmonary surfactant composed of lipids 90 and proteins 10 is considered the major physiological barrier against airborne pathogens. The principle phospholipid components of lung surfactant were examined in an in vitro model to characterize their interactions with VACV a surrogate for variola virus. One of them Dipalmitoyl phosphatidylglycerol DPPG was recently shown to inhibit VACV cell infection. Results The interactions of poxvirus particles from the Western Reserve strain VACV-WR and the Lister strain VACV-List with model membranes for pulmonary surfactant phospholipids in particular DPPG were studied by Electron Spin Resonance ESR and proton Nuclear Magnetic Resonance 1H-NMR . ESR experiments showed that DPPG exhibits specific interactions with both viruses while NMR experiments allowed us to deduce its stoichiometry and to propose a model for the mechanism of interaction at the molecular level. Conclusions These results confirm the ability of DPPG to strongly bind to VACV and suggest that similar interactions occur with variola virus. Similar studies of the interactions between lipids and other airborne pathogens are warranted. Background Membrane contacts occur at the very early steps of pulmonary viral infection 1 . This is especially important under circumstances where aerosol dispersion of viruses occurs readily 2 and an aerosol respiratory contamination would be an easy way for a biological agent to cause massive casualties. One of the initial and essential steps in a pulmonary infection is the .

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