Vitamin A transport complex during treatment with an oral aromatic retinoid (RO 10-9359).

No significant changes were noted in the serum levels or molar ratios of vitamin A, retinol-binding protein (RBP) and prealbumin even during long-term (up to 15 months) treatment with RO 10-9359 in 19 patients with normal renal function. Nor did any significant alteration occur in the highly significant correlations between vitamin A and RBP, and between RBP and prealbumin. In 3 patients with slightly elevated serum creatinine, some tendency towards an elevation of vitamin A and RBP levels was seen.