Gülay Karagüzel1, Nil P Sakarya2, Sevgi Bahadır3, Selçuk Yaman4, Ayşenur Ökten5. 1. Department of Pediatric Endocrinology, Karadeniz Technical University, School of Medicine, Trabzon 61080, Turkey. Electronic address: karaguzelg@gmail.com. 2. Department of Pediatrics, Karadeniz Technical University, School of Medicine, Trabzon 61080, Turkey. 3. Department of Dermatology, Karadeniz Technical University, School of Medicine, Trabzon 61080, Turkey. 4. Department of Biochemistry, Karadeniz Technical University, School of Medicine, Trabzon 61080, Turkey. 5. Department of Pediatric Endocrinology, Karadeniz Technical University, School of Medicine, Trabzon 61080, Turkey.
Abstract
BACKGROUND & AIMS: Vitiligo is a pigmentary disorder and autoimmune pathogenesis seems most likely. Decreased vitamin D levels have been related to several autoimmune diseases. Little is known about the association of vitiligo and vitamin D. We aimed to evaluate serum 25-hydroxyvitamin D [25(OH)D] levels in children with vitiligo and to determine the efficacy of oral vitamin D therapy on the repigmentation of vitamin D deficient patients. METHODS: Thirty patients aged 6-17 years with vitiligo and 30 sex- and age-matched apparently healthy controls were included in this prospective study. Size of the vitiligo representative area was estimated using the point counting method and blood samples were obtained at the beginning and month six. By the end of the study, all patients treated with topical tacrolimus for six months and the patients who were vitamin D deficient (n = 14) had been on combination treatment of oral vitamin D and topical tacrolimus. A dose of 1500 IU/day vitamin D was given if the serum 25(OH)D levels <20 ng/ml and 3000 IU/day was given if the levels <10 ng/ml for six months. Serum 25(OH)D levels were measured by high-performance liquid chromatography. RESULTS: Serum 25(OH)D levels of patients and controls were not significantly different (p > 0.05). Lesion size decreased from 66.1 ± 58.3 cm2 to 48.0 ± 52.6 cm2 after six months of treatment in patients who received combination treatment (p < 0.001) and increased in patients who received only topical therapy from 34.8 ± 48.1 cm2 to 53.5 ± 64.9 cm2 (p < 0.01). CONCLUSIONS: Although we did not determine decreased serum 25(OH)D levels in children with vitiligo, we showed that combination treatment with oral vitamin D and topical tacrolimus is more effective in reaching repigmentation than topical tacrolimus alone. Oral vitamin D supplementation might be useful for children with vitiligo who are also deficient in vitamin D.
BACKGROUND & AIMS:Vitiligo is a pigmentary disorder and autoimmune pathogenesis seems most likely. Decreased vitamin D levels have been related to several autoimmune diseases. Little is known about the association of vitiligo and vitamin D. We aimed to evaluate serum 25-hydroxyvitamin D [25(OH)D] levels in children with vitiligo and to determine the efficacy of oral vitamin D therapy on the repigmentation of vitamin D deficient patients. METHODS: Thirty patients aged 6-17 years with vitiligo and 30 sex- and age-matched apparently healthy controls were included in this prospective study. Size of the vitiligo representative area was estimated using the point counting method and blood samples were obtained at the beginning and month six. By the end of the study, all patients treated with topical tacrolimus for six months and the patients who were vitamin D deficient (n = 14) had been on combination treatment of oral vitamin D and topical tacrolimus. A dose of 1500 IU/day vitamin D was given if the serum 25(OH)D levels <20 ng/ml and 3000 IU/day was given if the levels <10 ng/ml for six months. Serum 25(OH)D levels were measured by high-performance liquid chromatography. RESULTS: Serum 25(OH)D levels of patients and controls were not significantly different (p > 0.05). Lesion size decreased from 66.1 ± 58.3 cm2 to 48.0 ± 52.6 cm2 after six months of treatment in patients who received combination treatment (p < 0.001) and increased in patients who received only topical therapy from 34.8 ± 48.1 cm2 to 53.5 ± 64.9 cm2 (p < 0.01). CONCLUSIONS: Although we did not determine decreased serum 25(OH)D levels in children with vitiligo, we showed that combination treatment with oral vitamin D and topical tacrolimus is more effective in reaching repigmentation than topical tacrolimus alone. Oral vitamin D supplementation might be useful for children with vitiligo who are also deficient in vitamin D.