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·药学研究·


          骨化三醇通过VDR/Ca /细胞焦亡信号通路逆转脓毒症免疫抑制                                                                  Δ
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          尚圣兰    1, 2* ,邹 硕 ,魏宇琪 ,余梦辰 ,周 帆 ,赵 燕 ,余爱荣 (1.武汉科技大学医学院,武汉 430065;
          2.中部战区总医院临床药学科,武汉 430070;3.湖北科技学院药学院,湖北 咸宁 437100)
          中图分类号  R965      文献标志码  A      文章编号  1001-0408(2025)18-2232-06
          DOI  10.6039/j.issn.1001-0408.2025.18.03

          摘   要  目的  探讨骨化三醇对脓毒症免疫抑制的影响及可能机制。方法  采用盲肠结扎穿孔术(CLP)建立脓毒症免疫抑制小鼠
          模型,检测假手术组、CLP组和骨化三醇(1 μg/kg)组小鼠7 d生存率和血清中肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)、IL-1β
          水平,观察肺组织形态学变化。选用小鼠巨噬细胞系RAW264.7细胞建立脂多糖(LPS)耐受细胞(即脓毒症免疫抑制细胞模型),
          检测培养基组、LPS组、LPS耐受组和骨化三醇(5 μmol/L)组细胞上清液中TNF-α、IL-6水平和细胞中IL-1β、核苷酸结合结构域富
          含亮氨酸重复序列和含热蛋白结构域受体3(NLRP3)、IL-18、胱天蛋白酶1(caspase-1)mRNA表达量,以及碘化丙啶(PI)阳性率、
          caspase-1活性、乳酸脱氢酶(LDH)漏出率和Ca 水平。结果  与CLP组比较,骨化三醇组小鼠的7 d生存率和血清中TNF-α、IL-6
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          和IL-1β水平均显著升高(P<0.05),肺组织损伤明显减轻。与LPS耐受组比较,骨化三醇组细胞上清液中TNF-α和IL-6水平,以
          及细胞中IL-1β、NLRP3、IL-18、caspase-1 mRNA表达量和PI阳性率、caspase-1活性、LDH漏出率、Ca 水平均显著升高(P<0.05)。
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          结论  骨化三醇可逆转脓毒症免疫抑制,该作用机制可能是通过骨化三醇与维生素D受体结合,从而促进内质网释放Ca ,进而驱
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          动NLRP3/caspase-1介导的细胞焦亡途径来实现的。
          关键词  骨化三醇;脓毒症;免疫抑制;细胞焦亡;Ca              2+

          Calcitriol reverses sepsis-induced immunosuppression via VDR/Ca /pyroptosis signaling pathway
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          SHANG Shenglan ,ZOU Shuo ,WEI Yuqi ,YU Mengchen ,ZHOU Fan ,ZHAO Yan ,YU Airong                     2
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         (1.  School  of  Medicine,  Wuhan  University  of  Science  and  Technology,  Wuhan  430065,  China;2.  Dept.  of
          Clinical Pharmacy, General Hospital of Central Theater Command of PLA, Wuhan 430070, China;3. School of
          Pharmacy, Hubei University of Science and Technology, Hubei Xianning 437100, China)
          ABSTRACT    OBJECTIVE  To  investigate  the  effects  of  calcitriol  on  sepsis-induced  immunosuppression  and  its  potential
          mechanism.  METHODS  A  sepsis-induced  immunosuppression  mice  model  was  established  using  cecal  ligation  and  puncture
         (CLP).  The  7-day  survival  rate,  serum  levels  of  tumor  necrosis  factor- α (TNF- α),  interleukin-6 (IL-6),  and  IL-1β  were
          determined in sham operation group, CLP group and calcitriol group (1 μg/kg); the morphological changes of lung tissue in mice
          were  observed.  Lipopolysaccharide (LPS)  tolerance  macrophage  models (representing  sepsis-induced  immunosuppression)  were
          established using mice macrophage cell line RAW264.7 cells. The levels of TNF-α and IL-6 in cell supernatants as well as mRNA
          expressions  of  IL-1β,  nucleotide-binding  domain  leucine-rich  repeat  and  pyrin  domain-containing  receptor  3 (NLRP3),  IL-18  and
          caspase-1  were  assessed  in  culture  medium  group,  LPS  group,  LPS  tolerance  group,  and  calcitriol (5  μmol/L)  group.  The
          following  parameters  were  measured:  propidium  iodide (PI)-positive  cell  ratio,  caspase-1  activity,  lactate  dehydrogenase (LDH)
          release,  and  Ca   levels.  RESULTS  Compared  with  CLP  group,  7-day  survival  rate  and  serum  levels  of  TNF-α,  IL-6  and  IL-1β
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          were  increased  significantly  in  calcitriol  group (P<0.05).  Additionally,  pulmonary  tissue  damage  was  markedly  attenuated  in
          calcitriol group. Compared with LPS tolerance group, the levels of TNF-α and IL-6 in cell supernatants, mRNA expressions of IL-
                                                              1β,  NLRP3,  IL-18  and  caspase-1,  PI-positive  cell  ratio,
              Δ 基金项目 国家自然科学基金项目(No.82304576);中国博士后
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          科学基金项目(No.2022M713859);湖北省自然科学基金项目(No.              caspase-1  activity,  LDH  release,  and  Ca   levels  were  all
          2022CFB879);武汉市知识创新专项(No.2022020801020521)          increased   significantly   in   calcitriol   group  (P<0.05).
             *第一作者 主管药师,硕士生导师,博士。研究方向:抗炎与抗感                   CONCLUSIONS    Calcitriol   can   reverse   sepsis-induced
          染药物药理学。E-mail:s_shang0818@163.com
                                                              immunosuppression,  and  the  mechanism  of  action  may  be
              # 通信作者 主任药师,硕士生导师,博士。研究方向:临床药学。
          E-mail:yarfwy@163.com                               achieved  by  the  binding  of  calcitriol  to  vitamin  D  receptor,


          · 2232 ·    China Pharmacy  2025 Vol. 36  No. 18                            中国药房  2025年第36卷第18期
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