Vitamin K deficiency evaluated by serum levels of undercarboxylated osteocalcin in patients with anorexia nervosa with bone loss.

BACKGROUND & AIMS: Osteoporosis is a chief complication in patients with anorexia nervosa. Serum levels of undercarboxylated osteocalcin reflect serum and bone vitamin K deficiency. We investigated vitamin K status in patients with anorexia nervosa to help establish prevention and treatment recommendations for osteoporosis. METHODS: Fifty-four female amenorrheic patients with anorexia nervosa (29 restricting-type and 25 binge eating/purging type) (age, 28.0 (26.7-31.1) (mean (95% CI)) years; body mass index, 14.8 (14.1-15.5) kg/m(2), duration of illness; 107.3 (88.5-126.0) months) and 15 age-matched healthy females were included in this study. We measured serum levels of undercarboxylated osteocalcin, biochemical and nutritional markers, and bone metabolic markers. Dietary vitamin K intake was evaluated by a questionnaire. RESULTS: Lumbar bone mineral density and T-scores in patients with anorexia nervosa were 0.756 (0.721-0.790) g/cm(2) and -2.4 (-2.1 to -2.7), respectively, indicating bone loss. Serum levels of undercarboxylated osteocalcin in patients with anorexia nervosa were significantly higher than those of controls. The 17% of restricting type and 40% of binge eating/purging type anorexia nervosa patients, serum levels of undercarboxylated osteocalcin were higher than 4.5 ng/ml and were diagnosed with vitamin K deficiency. Serum levels of undercarboxylated osteocalcin correlated significantly and negatively with vitamin K intake in patients with anorexia nervosa. CONCLUSIONS: Patients with anorexia nervosa had vitamin K deficiency. Since a supplement of vitamin K might be effective for maintaining bone quality, we provide recommendations regarding vitamin K intake for prevention and treatment of osteoporosis in patients with AN.

Home parenteral nutrition therapy in seven patients with anorexia nervosa: the role and indications.

Home parenteral nutrition (HPN) is a well-established intervention to sustain life in malnourished patients at home. Because it is difficult for patients with anorexia nervosa (AN) to gain weight or stop purging, such patients require repeated hospitalizations. Although HPN has not been commonly used for AN patients in Japan, we utilized this approach to treat seven AN patients. We herein present the clinical course and outcome of these seven patients, the application criteria for HPN in our institution, and the potential problems associated with HPN. Despite its complications, HPN may be a useful measure to help patients with persistent AN avoid multiple hospitalizations.