Stomatology ›› 2022, Vol. 42 ›› Issue (7): 600-603.doi: 10.13591/j.cnki.kqyx.2022.07.005

• Basic Research • Previous Articles     Next Articles

Spatial and temporal expression of FAM20C in mandibular condyle development of mice

QI Hao, MA Su, YUAN Zhaoyang, WU Guodong, LIU Peihong   

  1. Department of Periodontics, The First Affiliated Hospital of Harbin Medical University, School of Stomatology, Harbin Medical University, Harbin 150001, China
  • Revised:2022-02-22 Online:2022-07-28 Published:2022-07-22

Abstract: Objective To observe the spatial and temporal expression of FAM20C in condylar cartilage at different stages of condylar development in mice and explore its possible mechanism. Methods HE staining and modified safranin O-fast green staining were used to observe morphological changes of condylar cartilage and subchondral bone in 17.5 days of embryo and 0, 7, and 21 days after birth. Immunohistochemical staining was used to observe the localization and expression of FAM20C in mouse condylar cartilage tissues at corresponding time points. The mean optical density values of FAM20C positive expression were measured and subjected to one-way ANOVA. Results Results of HE staining and modified safranin O-fast green staining showed that with the progression of endochondral ossification, the length of condylar chondrocyte layer decreased; the volume of subchondral bone increased, and the volume of mandibular condyle increased. The immunohistochemical results showed that FAM20C was positively expressed in condylar cartilage tissue of the four groups of mice. FAM20C was mainly expressed in the proliferating chondrocyte layer, and pre-hypertrophic chondrocyte layer of condylar cartilage and a small amount was expressed in the hypertrophic chondrocyte layer and subchondral bone layer. With the development of condyle, the expression of FAM20C gradually decreased. Results of statistical analysis showed that there was a significant difference in FAM20C positive expression at each time point (P<0.01). Conclusion FAM20C is involved in mandibular condyle development in mice and may play an important role in condyle formation by regulating the proliferation and differentiation of condylar chondrocytes.

Key words: FAM20C, condylar cartilage, development, temporal and spatial expression, mice

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