BACKGROUND: Serum 25-hydroxyvitamin D (25(OH)D) is low in obese adults. OBJECTIVE: To examine serum 25(OH)D in obese (BMI >95th percentile for age) vs. non-obese (BMI = 5th-75th percentile for age) 6-10-year-old African American children and compare their differences in therapeutic response to vitamin D supplementation. METHODS AND PROCEDURES: In an open label non-randomized pre-post comparison 21 obese (OB) and 20 non-obese (non-OB) subjects matched for age, sex, skin color, and pubertal maturation were treated with 400 IU of vitamin D(3) daily for 1 month. Serum 25(OH)D, 1,25-dihydroxyvitamin D (1,25(OH)(2)D), parathyroid hormone (PTH), leptin, and markers of bone turnover (serum bone-specific alkaline phosphatase (BSAP), osteocalcin (OC), and urine n -telopeptide cross-links of type 1 collagen (urine NTX)) were measured. Vitamin D deficiency was defined as serum 25(OH)D < or =20 ng/ml and insufficiency as 21-29 ng/ml respectively. RESULTS: Vitamin D deficiency occurred in 12/21 (57%) OB vs. 8/20 (40%) non-OB at baseline (P = 0.35) and persisted in 5/21 (24%) OB vs. 2/18 (11%) non-OB (P = 0.42) after treatment. When the cohort was stratified by the baseline levels of 25(OH)D, there were differences in the response to treatment in the obese and non-obese cohorts. DISCUSSION: Vitamin D deficiency was common among OB and non-OB preadolescent African American children, and 400 IU of vitamin D(3) (2x the recommended adequate intake) daily for 1 month was inadequate to raise their blood levels of 25(OH)D to > or =30 ng/ml.
BACKGROUND: Serum 25-hydroxyvitamin D (25(OH)D) is low in obese adults. OBJECTIVE: To examine serum 25(OH)D in obese (BMI >95th percentile for age) vs. non-obese (BMI = 5th-75th percentile for age) 6-10-year-old African American children and compare their differences in therapeutic response to vitamin D supplementation. METHODS AND PROCEDURES: In an open label non-randomized pre-post comparison 21 obese (OB) and 20 non-obese (non-OB) subjects matched for age, sex, skin color, and pubertal maturation were treated with 400 IU of vitamin D(3) daily for 1 month. Serum 25(OH)D, 1,25-dihydroxyvitamin D (1,25(OH)(2)D), parathyroid hormone (PTH), leptin, and markers of bone turnover (serum bone-specific alkaline phosphatase (BSAP), osteocalcin (OC), and urine n -telopeptide cross-links of type 1 collagen (urine NTX)) were measured. Vitamin D deficiency was defined as serum 25(OH)D < or =20 ng/ml and insufficiency as 21-29 ng/ml respectively. RESULTS:Vitamin D deficiency occurred in 12/21 (57%) OB vs. 8/20 (40%) non-OB at baseline (P = 0.35) and persisted in 5/21 (24%) OB vs. 2/18 (11%) non-OB (P = 0.42) after treatment. When the cohort was stratified by the baseline levels of 25(OH)D, there were differences in the response to treatment in the obese and non-obese cohorts. DISCUSSION: Vitamin D deficiency was common among OB and non-OB preadolescent African American children, and 400 IU of vitamin D(3) (2x the recommended adequate intake) daily for 1 month was inadequate to raise their blood levels of 25(OH)D to > or =30 ng/ml.
Authors: Giuseppe Saggese; Francesco Vierucci; Flavia Prodam; Fabio Cardinale; Irene Cetin; Elena Chiappini; Gian Luigi De' Angelis; Maddalena Massari; Emanuele Miraglia Del Giudice; Michele Miraglia Del Giudice; Diego Peroni; Luigi Terracciano; Rino Agostiniani; Domenico Careddu; Daniele Giovanni Ghiglioni; Gianni Bona; Giuseppe Di Mauro; Giovanni Corsello Journal: Ital J Pediatr Date: 2018-05-08 Impact factor: 2.638
Authors: Lynae J Hanks; Krista Casazza; Ambika P Ashraf; Sasanka Ramanadham; Jamy Ard; Molly S Bray; T Mark Beasley; Jose R Fernandez Journal: J Bone Miner Metab Date: 2013-04-02 Impact factor: 2.626
Authors: Sara Bañón; Marta Rosillo; Ana Gómez; María J Pérez-Elias; Santiago Moreno; José Luis Casado Journal: Endocrine Date: 2014-11-29 Impact factor: 3.633