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Membrane characteristics in vitamin E deficiency and the assessment of vitamin E status

After fifty years of research the biological function of vitamin E in cellular metabolism is still not completely understood. The study of this vitamin is made complex by the polymorphous macroscopical and microscopical findings in different mammals and birds with experimental vitamin E deficiency (Scott, 1970) and also by the often extremely diverse methodological approaches to the problem. However, it is this very situation which could lead to solving the problem from the view point of cell biology. Cells can only organize their cytoplasmic space in the presence of cellular membranes which not only surround but also compartmentalize the cell. The chemical anatomy of the membrane is described in ‘membrane models’, the most recent being that of Singer & Nicolson (1972). This model describes the membrane as a two-dimensionally oriented solution of globular proteins in a viscous phospholipid bilayer solvent. Membrane properties define to a large extent cellular and tissue properties. Changes in membrane properties introduce functional and morphological aberrations, depending in character upon the kind of membrane