Objective: To investigate the correlations of serum total 25-hydroxyvitamin D (T-25 (OH) D) levels with serum cytokine levels including interleukin-6 (IL-6), interleukin-8 (IL-8) and tumor necrosis factor α (TNF-α) and Crohn's disease activity index (CDAI) in patients with Crohn's disease (CD). Methods: A total of 60 patients with CD admitted in Peking Union Medical College Hospital from April 2014 to March 2019 who completed the tests for serum T-25 (OH) D and cytokines (IL-6, IL-8 and/or TNF-α) were retrospectively enrolled. Clinical data were collected for analysis. Results: Among 60 CD patients, there were 46 male patients, and the age was (34±13) years. There were 16 patients (26.7%) in remission and 44 cases (73.3%) in active status. The T-25(OH)D level was (16.0±7.7)μg/L. The prevalence of vitamin D sufficiency, insufficiency and deficiency was 26.7%, 40.0% and 33.3%, respectively. Correlation analysis showed that serum T-25 (OH) D level was negatively correlated with CDAI (r=-0.363,P=0.004), IL-6 level (r=-0.360,P=0.007), hsCRP level(r=-0.272, P=0.043) and ESR level(r=-0.293, P=0.024), while positively correlated with serum Alb level(r=0.372, P=0.003)、Hb(r=0.330, P=0.010) and BMI(r=0.276, P=0.033).Twenty-three cases (52.3%) of active CD patients accompanied with infection had a lower level of serum T-25 (OH) D than those without infection [(12.55±7.17) vs (17.41±6.49)μg/L, P=0.023]. Conclusion: Serum T-25 (OH) D level was negatively correlated with CDAI, serum IL-6 level and inflammatory markers in patients with CD, and it was lower in active CD patients with infection than those without infection.
目的： 探究克罗恩病（CD）患者血清总25羟维生素D[T-25（OH）D]水平及其与外周血细胞因子白细胞介素6（IL-6）、IL-8及肿瘤坏死因子α（TNF-α）和克罗恩病活动指数（CDAI）之间的相关性。 方法： 回顾性纳入2014年4月至2019年3月收住北京协和医院且行血清T-25（OH）D和细胞因子[IL-6、IL-8和（或）TNF-α]检测的CD患者60例，收集临床资料进行分析。 结果： 60例CD患者中男46例，年龄（34±13）岁；其中缓解期16例（26.7%），活动期44例（73.3%）；其血清T-25（OH）D水平为（16.0±7.7）μg/L，其中维生素D充足为16例（26.7%），维生素D不足为24例（40.0%），维生素D缺乏为20例（33.3%）。相关性分析发现，血清T-25（OH）D水平与CDAI（r=-0.363，P=0.004）、IL-6（r=-0.360，P=0.007）、超敏C反应蛋白（hsCRP）（r=-0.272，P=0.043）、红细胞沉降率（ESR）（r=-0.293，P=0.024）水平均呈负相关；而与血清白蛋白（Alb）（r=0.372，P=0.003）、血红蛋白（Hb）（r=0.330，P=0.010）和体质指数（BMI）（r=0.276，P=0.033）呈正相关。在44例活动期CD患者中，23例（52.3%）合并感染，其血清T-25（OH）D水平较CD活动期未合并感染组低[（12.55±7.17）比（17.41±6.49）μg/L，P=0.023]。 结论： CD患者血清T-25（OH）D水平与CDAI、IL-6及炎症指标均呈负相关，且合并感染的CD活动期患者血清T-25（OH）D水平更低。.
Keywords: Crohn′s disease; Cytokines; Vitamin D.