© 1990 British Society for Rheumatology
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INCREASED APOTRANSCOBALAMIN II LEVELS IN RHEUMATOID ARTHRITIS




*Department of Medicine, La Paz Hospital, Autonomous Faculty of Medicine Madrid, Spain
Division of Haematology, La Paz Hospital, Autonomous Faculty of Medicine Madrid, Spain
Division of Rheumatology Unit, La Paz Hospital, Autonomous Faculty of Medicine Madrid, Spain
La Paz Hospital, Autonomous Faculty of Medicine Madrid, Spain
Correspondence to:
Correspondence to Dr F. Arnalich, Hospital La Paz. Resid. General, Planta 10, Paseo de la Castellana 261, 28046 Madrid, Spain
The distribution of endogenous cobalamin among serum cobalamin-binding proteins was studied in 30 patients with active rheumatoid arthritis (RA) and 27 in clinical remission
The mean total serum cobalamin concentration (holo-transcobalamin I and II) was similar in both groups of patients, whereas mean apotranscobalamin II was significantly increased in patients with active RA. The clinical significance of this finding is not yet established but it might be a useful parameter for the evaluation of disease activity in RA
KEY WORDS: Rheumatoid arthritis, Serum cobalamin-binding proteins, Apotranscobalamin II, Vitamin B12 binding proteins