Dental and periodontal phenotypes of Dlx2 overexpression in mice

Dai,Jiewen; Si,Jiawen; Ouyang,Ningjuan; Zhang,Jianfei; Wu,Dandan; Wang,Xudong; Shen,Guofang

doi:10.3892/mmr.2017.6315

Dental and periodontal phenotypes of Dlx2 overexpression in mice

Authors:
- Jiewen Dai
- Jiawen Si
- Ningjuan Ouyang
- Jianfei Zhang
- Dandan Wu
- Xudong Wang
- Guofang Shen
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Affiliations: Department of Oral and Cranio‑maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, P.R. China
Published online on: March 10, 2017 https://doi.org/10.3892/mmr.2017.6315
Pages: 2443-2450
Copyright: © Dai et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Distal-less homeobox 2 (Dlx2) is a member of the homeodomain family of transcription factors and is important for the development of cranial neural crest cells (CNCCs)‑derived craniofacial tissues. Previous studies revealed that Dlx2 was expressed in the cementum and a targeted null mutation disrupted tooth development in mice. However, whether Dlx2 overexpression may impair in vivo tooth morphogenesis remains to be elucidated. The present study used a transgenic mouse model to specifically overexpress Dlx2 in neural crest cells in order to identify the dental phenotypes in mice by observation, micro‑computed tomography and histological examination. The Dlx2‑overexpressed mice exhibited tooth abnormalities including incisor cross‑bite, shortened tooth roots, increased cementum deposition, periodontal ligament disorganization and osteoporotic alveolar bone. Therefore, Dlx2 overexpression may alter the alveolar bone, cementum and periodontal ligament (PDL) phenotypes in mice.

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