Premium
Encapsulation of hemoglobin in phospholipid vesicles
Author(s) -
Gaber Bruce P.,
Yager Paul,
Sheridan James P.,
Chang Eddie L.
Publication year - 1983
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(83)80625-5
Subject(s) - vesicle , hemoglobin , methemoglobin , phospholipid , phosphatidylcholine , chemistry , liposome , sonication , synthetic membrane , myoglobin , chromatography , biophysics , micelle , lipid bilayer , membrane , biochemistry , organic chemistry , aqueous solution , biology
Hemoglobin has been encapsulated in phospholipid vesicles by extrusion of hemoglobin/lipid mixtures through polycarbonate membranes. This technique avoids the use of organic solvents, sonication, and detergents which have proven deleterious to hemoglobin. The vesicles are homogeneous, with a mean size of 2400 Å as determined by photon correlation spectroscopy. The encapsulated hemoglobin binds oxygen reversibly and the vesicles are impermeable to ionic compounds. Hemoglobin encapsulated in egg phosphatidylcholine vesicles converts to methemoglobin within 2 days at 4°C. By contrast, when a mixture of dimyristoyl phosphatidylcholine, cholesterol and dicetyl phosphate is used there is no acceleration in methemoglobin formation, and the preparation is stable for at least 14 days at 4°C.