华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

软骨细胞增殖与凋亡在人重组白细胞介素-1β介导的颞下颌关节炎症损伤中的意义

李松,杨春,罗应伟,沈丽宁,金岩   

  1. 650031 昆明医学院口腔系(李 松,杨 春,罗应伟,沈丽宁),第四军医大学口腔医学院(金 岩)
  • 收稿日期:2002-04-25 修回日期:2002-04-25 出版日期:2002-04-20 发布日期:2002-04-20

Roles of Proliferation and Apoptosis of Chondrocytes in Inflammatory Lesions Mediated by Recombinant Human Interleukin-1B on Condylar Cartilage of Temporomandibular Joint

Li Song, Yang Chun, Luo Yingwei, et al   

  1. Li Song, Yang Chun, Luo Yingwei, et al Department ofStomatology,KunmingMedical College Jin Yan Stomatological College,the Fourth MilitaryMedicalUniversity
  • Received:2002-04-25 Revised:2002-04-25 Online:2002-04-20 Published:2002-04-20

摘要:

目的:探讨细胞增殖与凋亡在人重组白细胞介素-1B介导的颞颌关节炎症损伤中的作用。方法:选用SD大鼠颞下颌关节腔内反复多次注射rhIL-1B,造成炎症损伤,利用免疫组织化学染色及原位末端标记法,观察炎症损伤过程中髁突软骨细胞增殖及凋亡的变化。结果:注射后1~30 d,实验侧髁突软骨增殖层PCNA阳性指数均较对照侧低,以1~7 d最明显;实验侧髁突软骨细胞凋亡数较对照侧多,主要分布于软骨增殖层及前肥厚层中,以1~7 d 最明显,15 d后凋亡细胞数明显减少,仅见个别凋亡细胞散在分布于软骨浅层。结论:rhIL-1B关节内注射不仅使髁突软骨细胞增殖受抑制,而且细胞凋亡也可能是rhIL-1B致关节损伤的途径之一,细胞增殖与凋亡协同参与了颞下颌关节炎症损伤的病理过程。

关键词: 增殖, 凋亡, 软骨细胞, 炎症

Abstract:

Objective:The purpose of this studywas to evaluate the role of cell proliferation and apoptosis in the inflammatory lesionme- diated by recombinanthuman interleukin-1Bon condylar cartilage of temporomandibular joint.Methods:The model of inflammatory lesion of temporomandibular jointin SD ratswas established by intraarticularinjectionwith recombinanthuman interleukin-1B. The expressions of proliferating cell nuclear antigen (PCNA) and apoptosis in cartilage were examined by immunohistochemical staining and Tdt-mediated dUTP nick end labelling (TUNEL) during series time of after injection of recombinant human interleukin-1B. Results:The immunostaiing results showed thatPCNAproteinwas expressed in proliferative zone of condylar cartilage, the positive index of PCNA decreased in proliferative zone after injection of recombinant human interleukin-1B1~30 days, and more obviously in 1~7 days. Apoptotic chondrocytes were mainly located in proliferative zone and the prehypertrophic zones, and the apoptotic chondrocytes increased in proliferative and prehypertrophic zones of condylar cartilage (P<0105).Conclusion:These results sug- gest that suppression of proliferating cell nuclear antigen and high apoptosis of chondrocytes may play an important role in the in- flammatory lesion or in the destructive process of temporomandibular joint osteoarthritis.

Key words: proliferation apoptosis, chondrocyte, inflammatory, lesion