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Changes of vitamin D  level and bone mineral density in children with inflammatory bowel disease

  

  1. Department of Gastroenterology,Beijing Children’s Hospital,Capital Medical University,Beijing  100045, China
  • Online:2016-08-06 Published:2016-08-02

儿童炎症性肠病维生素D水平和骨密度变化研究

  

  1. 首都医科大学附属北京儿童医院 a消化科,b放射科,北京  100045

Abstract:

Objective    To explore features of the change of vitamin D level and bone mineral density in children with inflammatory bowel disease(IBD). Methods    From January 2014 to September 2014,thirty-two children with IBD(study group) and thirty age and gender-matched healthy children(control group) were enrolled in the study. The children of study group and control group were tested for bone alkaline phosphate(BALP),bone gla protein(BGP) and 25(OH)D3 in blood serum by enzyme-linked immunosorbent assay(ELISA),and the clinical data such as calcium,phosphorus and albumin(ALB) in blood serum were collected. Results    There were 15 patients(9 males and 6 females) with ulcerative colitis(UC) and 17 patients(10 males and 7 females) with Crohn’s disease(CD) in the study group. There were 30 children(19 males and 11 females) in control group. The level of BGP(U=332.5,P=0.444) and BALP(U=350,P=0.637) in blood serum showed no significant difference between the study group and the control group. 25(OH)D3 concentration(t=-2.876,P=0.006),BMD(U=39.5,P<0.05) ,calcium(t=-6.654,P<0.05),phosphorus(U=216.5,P=0.007),and ALB (U=25,P<0.05) showed significant difference between the study group and the control group. In study group,25(OH)D3 concentration and BMD showed positive correlation(rs=0.504,P=0.005),while 25(OH)D3 and blood albumin levels showed negative correlation(rs=-0.315,P=0.019). There was significant difference between UC/CD group and control group in Z score of BMD(U=29.5,P<0.05;U=10,P<0.05),but no statistical difference between UC and CD patients in Z score of BMD (P=0.10). Conclusion    Most child patients with IBD have insufficient or lack of vitamin D and are more likely to have reduced bone mineral density.

Key words:  , inflammatory bowel disease;25-hydroxy-vitamin D3;bone mineral density;child

摘要:

目的    探讨炎症性肠病(IBD)患儿维生素D水平和骨密度的变化特点。方法    选取2014年1月至2014年9月首都医科大学附属北京儿童医院收治的32例IBD患儿为研究对象,同时选取年龄和性别相匹配的30名健康儿童为对照组。收集临床资料包括血钙、 血磷、 白蛋白, 酶联免疫吸附试验检测25-羟维生素D3 [25(OH)D3]、骨钙蛋白(BGP)、 骨碱性磷酸酶(BALP), 定量CT测定骨密度(BMD)。结果    IBD患儿中UC组15例(男9例,女6例),CD组17例(男10例,女7例),对照组30例(男19例,女11例)。IBD组与对照组相比BGP(U=332.5,P=0.444)、BALP(U=350,P=0.637)差异无统计学意义,25(OH)D3浓度(t=-2.876,P=0.006)、BMD(U=39.5,P<0.05) 、血钙(t=-6.654,P<0.05)、血磷(U=216.5,P=0.007)、血清白蛋白(U=25,P<0.05)差异有统计学意义。IBD组中血25(OH)D3浓度与BMD呈正相关(rs= 0.504,P=0.005),与血白蛋白水平呈负相关(rs=-0.315,P=0.019)。UC与CD两组间骨密度Z值比较差异无统计学意义(P=0.10)。结论    儿童IBD患者普遍存在维生素D不足或缺乏,较健康儿童更易出现骨密度减低。

关键词: 炎症性肠病, 25羟维生素D3, 骨密度, 儿童