中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (1): 113-117.doi: 10.3969/j.issn.2095-4344.2016.01.020

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

根尖乳头干细胞与牙周膜干细胞的生物学行为比较

赵 璐,于 莉,袁 萍,周春梅,吴佩玲   

  1. 新疆医科大学第二附属医院口腔科,新疆维吾尔自治区乌鲁木齐市 830063
  • 收稿日期:2015-11-03 出版日期:2016-01-01 发布日期:2016-01-01
  • 通讯作者: 吴佩玲,硕士,主任医师,博士生导师,新疆医科大学第二附属医院口腔科,新疆维吾尔自治区乌鲁木齐市 830063
  • 作者简介:赵璐,女,1990年生,山西省晋城市人,汉族,新疆医科大学在读硕士,主要从事口腔基础研究和牙体牙髓病学研究。
  • 基金资助:
    新疆维吾尔自治区自然科学基金(2015211C107)

Stem cells from the apical papilla versus periodontal ligament stem cells: biological behaviors

Zhao Lu, Yu Li, Yuan Ping, Zhou Chun-mei, Wu Pei-ling   

  1. Department of Stomatology, the Second Affiliated Hospital of Xinjiang Medical University, Urumqi 830063, Xinjiang Uygur Autonomous Region, China
  • Received:2015-11-03 Online:2016-01-01 Published:2016-01-01
  • Contact: Wu Pei-ling, Master, Chief physician, Doctoral supervisor, Department of Stomatology, the Second Affiliated Hospital of Xinjiang Medical University, Urumqi 830063, Xinjiang Uygur Autonomous Region, China
  • About author:Zhao Lu, Studying for master’s degree, Department of Stomatology, the Second Affiliated Hospital of Xinjiang Medical University, Urumqi 830063, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    the Natural Science Foundation of Xinjiang Uygur Autonomous Region, No. 2015211C107

摘要:

文章快速阅读:

文题释义:

根尖乳头干细胞:2006年由Sonoyam 等自人根尖尚未形成的第三磨牙牙根部分离出成体干细胞,并命名为根尖乳头干细胞。与牙髓干细胞比较,根尖乳头干细胞有着更高的溴脱氧尿苷吸收率,更强的增殖能力及端粒酶活性和细胞迁移能力,其可能是一种比牙髓干细胞更早期、更优越的牙源性干细胞的资源,在牙髓再生和组织工程运用中具有广阔的应用前景。
牙周膜干细胞:自人牙牙周膜处分离出的成体干细胞,与根尖乳头干细胞、牙髓干细胞、牙囊干细胞共同位于牙根尖端部。牙周膜干细胞是牙周组织再生最可靠的种子细胞,具有向其他类型组织细胞分化的能力,体外矿化诱导时,牙周膜干细胞能分化为成骨样细胞。牙周膜干细胞是牙周缺损细胞治疗和基因治疗重要的细胞学基础,是近年来牙周病研究的热点之一。

 

背景:根尖乳头干细胞是一种新发现的间充质干细胞,其能否应用于牙根再生是目前研究的关键。
目的:体外培养鼠根尖乳头干细胞与牙周膜干细胞,研究比较两者生物学行为,为根尖乳头干细胞用于牙根再生的可能性提供实验依据。
方法:取幼鼠根尖尚未发育完全的健康下颌牙,用酶消化法获得根尖乳头干细胞和牙周膜干细胞,免疫荧光法鉴定干细胞表面标志物,MTT法测定细胞生长曲线,茜素红染色观察细胞矿化结节形成情况。
结果与结论:①鼠根尖乳头干细胞和牙周膜干细胞均呈STRO-1强阳性表达,根尖乳头干细胞呈CD90强阳性表达而CD146阳性表达稍弱,牙周膜干细胞呈CD146强阳性表达而CD90阳性表达稍弱。②根尖乳头干细胞和牙周膜干细胞吸光度值随着时间的递增呈现出增高的状态,第8天起趋于平稳。自第4天起根尖乳头干细胞的增殖活力明显强于牙周膜干细胞,差异有显著性意义(P < 0.05)。③与牙周膜干细胞相比,根尖乳头干细胞染色明显较深,可推测矿化结节形成数量较多。④结果表明与牙周膜干细胞相比,根尖乳头干细胞具有较强的增殖活性和矿化能力。 

 ORCID: 0000-0002-4293-4392(吴佩玲)

关键词: 干细胞, 培养, 根尖乳头干细胞, 牙周膜干细胞, 牙乳头, 生物学行为, 新疆维吾尔自治区自然科学基金

Abstract:

BACKGROUND: Stem cells from the apical papilla are a new kind of mesenchymal stem cells, and whether it can 
be used in root regeneration is the key to the present study.
OBJECTIVE: To culture rat stem cells from the apical papilla and periodontal ligament stem cells in vitro, and to compare the biology behaviors of these two kinds of cells, thereby providing experimental basis for the application of stem cells from the apical papilla in root regeneration.
METHODS: The apical papilla, as well as the periodontal ligament tissues from the healthy mandibular teeth of young rats were digested and cultured. Immunophenotypes of stem cells from the apical papilla and periodontal ligament stem cells were detected by immunofluorescence technique. Then, cell growth curves were determined by MTT method and mineralized nodule formation was observed by alizarin red staining.
RESULTS AND CONCLUSION: Stem cells from the apical papilla and periodontal ligament stem cells were both positive for STRO-1. Stem cells from the apical papilla were positive for CD90 and weakly positive for CD146. Periodontal ligament stem cells were positive for CD146 and weakly positive for CD90. The absorbance values of stem cells from the apical papilla and periodontal ligament stem cells increased with the increasing of time and became stable at 8 days. Since the 4th day, the proliferation capacity of stem cells from the apical papilla was significantly stronger than that of periodontal ligament stem cells (P < 0.05). Both of stem cells are visible to have mineralized nodule formation. Compared with the periodontal ligament stem cells, stem cells from the apical papilla were stained obviously deeper and had more mineralized nodules. These results show that stem cells from the apical papilla have stronger proliferation capacity and mineralization ability than periodontal ligament stem cells. 

 

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