Page 71 - 《中国药房》2023年19期
P. 71

高良姜素促进骨质疏松模型大鼠骨折愈合的机制研究
                                                                                            Δ


                         #
                *
          吴永铁 ,申雄成 [遵义市第一人民医院(遵义医科大学第三附属医院)骨科二病区,贵州 遵义 563000]
          中图分类号  R965;R285      文献标志码  A      文章编号  1001-0408(2023)19-2365-06
          DOI  10.6039/j.issn.1001-0408.2023.19.11

          摘  要  目的  初步探讨高良姜素(Gal)调节缺氧诱导因子1α(HIF-1α)/血管内皮生长因子(VEGF)信号通路对骨质疏松(OP)模
          型大鼠骨折愈合的影响。方法  采用双侧卵巢切除手术构建OP大鼠模型。实验设置假手术(Sham)组(生理盐水)、模型(Model)
          组(生理盐水)和 Gal 低、中、高剂量组(2.5、5、10 mg/kg)以及抑制剂组(10 mg/kg Gal+100 mg/kg HIF-1α/VEGF 信号通路抑制剂
          PX-478),每组12只。腹腔注射相应药物,每天1次,连续90 d。观察大鼠股骨显微结构,评估大鼠股骨生物力学状况,观察大鼠骨
          组织病理损伤及新生血管情况,检测大鼠股骨中血小板内皮细胞黏附分子1(PECAM-1)表达,检测大鼠血清中骨钙素(OCN)和Ⅰ
          型胶原交联C末端肽(CTX-Ⅰ)、骨形态发生蛋白2(BMP-2)含量以及骨痂组织中碱性磷酸酶(ALP)及HIF-1α/VEGF信号通路相
          关蛋白表达。结果  与Sham组比较,Model组大鼠骨密度(BMD)、骨体积分数(BV/TV)、骨小梁数(Tb.N)、骨小梁厚度(Tb.Th)、最
          大负载、新生血管数量和血管面积、PECAM-1平均荧光强度、OCN和BMP-2含量及ALP、HIF-1α、VEGF蛋白表达水平均显著降
          低/减少(P<0.05),CTX-Ⅰ含量显著升高(P<0.05)。与Model组比较,Gal低、中、高剂量组大鼠上述指标均显著逆转(P<0.05),
          且具有剂量依赖性。与Gal高剂量组比较,抑制剂组大鼠上述指标变化均显著逆转(P<0.05)。结论  Gal可调节骨代谢,改善OP
          模型大鼠骨密度,促进骨折愈合;其作用机制可能与激活HIF-1α/VEGF信号通路,促进血管生成有关。
          关键词  高良姜素;缺氧诱导因子1α;血管内皮生长因子;骨质疏松;骨折愈合

          Study on the mechanism of galangin promoting fracture in osteoporosis model rats
          WU Yongtie,SHEN Xiongcheng[Dept. Two  of  Orthopedics,  Zunyi  First  People’s  Hospital (the Third Affiliated
          Hospital of Zunyi Medical University), Guizhou Zunyi 563000, China]


          ABSTRACT     OBJECTIVE  To  preliminarily  investigate  the  impacts  of  galangin (Gal)  on  fracture  healing  in  osteoporosis (OP)
          model  rats  by  regulating  hypoxia-inducible  factor-1α (HIF-1α)/vascular  endothelial  growth  factor (VEGF)  signaling  pathway.
          METHODS The OP rat model was constructed by using bilateral ovariectomy surgery. The model rats were randomly divided into
          sham operation group (normal saline), model group (normal saline), Gal low-dose, medium-dose and high-dose groups (2.5, 5,
          10  mg/kg),  inhibitor  group (10  mg/kg  Gal+100  mg/kg  HIF-1α/VEGF  signaling  pathway  inhibitor  PX-478),  with  12  rats  in  each
          group. They  were  given  relevant  medicine  intraperitoneally,  once  a  day,  for  90  consecutive  days. The  microstructure  of  rat  bones
          was  observed,  the  biomechanical  status  of  rat  femurs  was  evaluated,  and  the  pathological  damage  and  neovascularization  of  rat
          callus tissue were observed. The expression of platelet endothelial cell adhesion molecule-1 (PECAM-1) in the femur was detected.
          The  contents  of  osteocalcin (OCN),  C-terminal  telopeptides  of  type  Ⅰ  collagen (CTX-Ⅰ)  and  bone  morphogenetic  protein  2
         (BMP-2)  in  serum  were  detected  as  well  as  the  expressions  of  alkaline  phosphatase (ALP)  and  HIF-1α/VEGF  signaling  pathway-
          related proteins in callus tissue. RESULTS Compared with the sham operation group, the BMD, BV/TV, Tb.N, Tb.Th, maximum
          load,  the  number  and  area  of  blood  vessels,  the  average  fluorescence  intensity  of  PECAM-1,  the  contents  of  OCN  and  BMP-2,
          and the expression levels of ALP, HIF-1α and VEGF proteins in the model group were reduced significantly (P<0.05), while the
          content  of  CTX-Ⅰ  increased  significantly (P<0.05).  Compared  with  the  model  group,  the  above  indexes  of  rats  were  reversed
          significantly in Gal low-dose, medium-dose and high-dose groups (P<0.05), in a dose-dependent manner. Compared with the Gal
          high-dose group, the above indexes of rats were reversed significantly in the inhibitor group (P<0.05). CONCLUSIONS Gal can
          regulate bone metabolism, improve bone density of OP model rats and promote fracture healing, the mechanism of which may be
                                                             associated  with  activating  the  HIF-1α/VEGF  signaling  pathway
             Δ 基金项目 遵义市科技计划项目(No. 遵市科合 HZ 字〔2022〕
          64号)                                               and promoting angiogenesis.
             * 第一作者 副 主 任 医 师 。 研 究 方 向 :骨 质 疏 松 。 E-mail:   KEYWORDS     galangin;   hypoxia-inducible   factor-1α;
          80120997@qq.com                                    vascular  endothelial  growth  factor;  osteoporosis;  fracture
             # 通信作者 副主任医师,硕士。研究方向:骨质疏松。E-mail:               healing
          278063358@qq.com


          中国药房  2023年第34卷第19期                                              China Pharmacy  2023 Vol. 34  No. 19    · 2365 ·
   66   67   68   69   70   71   72   73   74   75   76