目的 研究探讨体质指数和体脂百分比与老年类风湿关节炎患者发生肌少症的相关性。方法 纳入2018 年1月— 2020 年 6 月我院治疗的230例RA患者以及110例正常体检人员,分别设为研究组与对照组。采用双能X线骨密度仪测定骨骼肌肉量,四肢骨骼肌总量,体脂百分比(PBF),计算骨骼肌质量指数(SMI),体质指数(BMI);根据SMI水平将RA患者分为有、无肌少症组,比较两间组指标差异,采用Logistics回归分析探讨RA患者合并肌少症的独立影响因素。结果 ①RA组患者肌少症发生率高于对照组(49.1％ vs 18.2％,χ²=29.927,P＜0.001)。RA组患者消瘦百分比高于对照组(20.9％ vs 8％,χ²=5.375,P=0.020), RA组与正常对照组间BMI分组构成比比较差异有统计学意义(χ²=8.157,P=0.043)。②RA组BMI、骨骼肌量及四肢骨骼肌量均低于对照组,差异有统计学意义(P＜0.05),体脂百分比高于对照组,差异有统计学意义(P＜0.05)。③RA消瘦组肌少症发生率高于正常组(χ²=10.716,P＜0.001)、超重组(χ²=28.073,P＜0.001)和肥胖组(χ²=11.601,P＜0.001);RA消瘦组、正常组、超重组、肥胖组间肌少症发生率差异有统计学意义(χ²=32.522,P＜0.001)。PBF分组肌少症发生率正常组高于超重组,差异无统计学意义(χ²=2.609,P=0.016)。④RA肌少症组BMI消瘦百分比高于无肌少症组(22.1％ vs 3.4％,χ²=40.593,P＜0.001),BMI正常百分比高于无肌少症组(60.1％vs 51.3％,χ²=1.843,P=0.175);BMI超重百分比低于无肌少症组(15.0％ vs 39.3％,χ²=33.895,P＜0.001), BMI肥胖百分比低于无肌少症组(2.6％ vs 6.0％,χ²=1.531,P=0.216)。两组间PBF构成比比较差异无统计学意义(χ²=2.609,P=0.106)。⑤RA消瘦组患者肌少症的发生风险高于正常组(OR=7.197,95％CI:3.103～23.614,P＜0.001),超重RA患者肌少症的发生风险低于正常组(OR=0.095,95％CI:0.036～0.268,P=0.026),年龄为RA患者发生肌少症的危险因素(OR=1.096,95％CI:1.015～1.390,P＜0.001)。结论 肌少症在老年RA患者中发病率高,与体质指数具有一定相关性。

目的 探讨系统性红斑狼疮(SLE)患者外周血中25-羟基维生素D(25-OH-D)和白介素-17(IL-17)水平的变化及其临床意义。方法 选取40例SLE患者作为研究对象, 20例健康体检人员为健康对照组。运用电化学发光法检测25-OH-D水平,酶联免疫吸附法检测IL-17水平。结果 SLE患者25-OH-D水平明显低于健康对照组(P<0.01),活动期SLE患者25-OH-D水平明显低于缓解期患者(P<0.01)。SLE患者IL-17水平明显升高(P<0.01)。低25-OH-D水平与肾损害(P<0.01)相关,与疾病活动度评分(SLEDAI评分)(r=-0.844,P<0.01)及IL-17水平(r=-0.596,P<0.01)负相关。结论 SLE患者25-OH-D水平降低,低25-OH-D水平与肾损害、病情活动及高IL-17水平相关,25-OH-D可能参与了SLE的炎症进程。

Objective To assess the 25-hydroxyvitamin D (25-OH-D) and interleukin-17(IL-17) status in patients with systemic lupus erythematosus(SLE) and its clinical significance. Methods 40 SLE patients along with 20 matched controls were collected. Chemilumineseent immunoassay (CLIA) was used to detect the levers of serum 25-OH-D. The levels of serum IL-17 were evaluated using enzyme-linked immunosorbent assay (ELISA). Results Serum 25-OH-D level in SLE patients was significantly lower than in healthy controls (P<0.01). Serum 25-OH-D level in active SLE patients was significantly lower than in inactive SLE patients (P<0.01). Lever of IL-17 was significantly higher in SLE patients than in healthy controls (P<0.01). Insufficiency of 25-OH-D was related to renal disorders. Serum 25-OH-D level was negatively correlated with systemic lupus erythematosus disease activity index (SLEDAI) scores(r=-0.844, P<0.01)and serum levels of IL-17(r=-0.596, P<0.01). Conclusion Insufficiency of 25-OH-D is prevalent in SLE patients. It is associated with nephritis, disease activity and high serum levels of IL-17, thus it may play an important part in the inflammatory process in SLE.