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Vitamin A Deficiency and Serum or Plasma Fibronectin in the Rat and in Human Subjects¹

Department of Nutrition and Food Science, Massachusetts Institute of Technology, Cambridge, MA 02139

Fibronectin, a high-molecular-weight glycoprotein occurring in plasma and on the surface of many cells, is involved in cell adhesion and other cell-surface phenomena. Vitamin A deficiency in rats resulted in a threefold increase in the concentration of fibronectin in serum, as measured immunochemically. In vitamin A-depleted human subjects, on the other hand, no correlation could be found between plasma retinol and fibronectin levels.

KEY WORDS: • fibronectin • vitamin A • vitamin A deficiency

¹ This work was supported by grant CA13792, National Institutes of Health and grant 59-225 3-1-1-699, U.S. Department of Agriculture.

² Address for correspondence: Room 56-213, Department of Nutrition and Food Science, Massachusetts Institute of Technology, Cambridge, MA 02139.

Manuscript received 16 December 1983.

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