端粒酶逆转录酶基因在牙源性病损中的表达

目的 研究成釉细胞瘤（ameloblastoma,AB)和牙源性角化囊肿（odontogenic keratocyst,OKC)中hTERT mRNA的表达，探讨其在AB、OKC中的发生、发展及其生物学意义。方法 采用mRNA原位杂交法对口腔颌骨内54例AB、16例OKC及7例口腔正常粘膜，进行了hTERT mRNA的检测。结果 94.4%(51/54)AB、87.5%(14/16)OKC及1／7正常口腔粘膜有hTERT mRNA表达，3组相比差异有显著性（P＜0.001)。hTERT与AB不同组织学类型、病损发生部位、单房与多房无关（P＞0.05)，在AB外周细胞及星网状多边形细胞中有表达，在角化退变样细胞及颗粒样细胞中缺乏表达。结论 ①hTERT活化在AB及OKC的发生、发展中起重要作用；②hTERT活性阳性率与病变中的细胞分化，临床生物学行为有关，随着组织学分级增高hTERT mRNA阳性率及信号强度均增高。

Research on expression of telomerase in human odontogenic lesions

OBJECTIVE: To study hTERT mRNA expression in ameloblastoma (AB) and odontogenic keratocyst (OKC) and to investigate genesis, development and biological characteristics of AB and OKC. METHODS: hTERT mRNA expression in 54 cases of AB, 16 cases of OKC, 7 cases of oral normal mucosa was detected by in situ hybridization. RESULTS: The positive rates of hTERT mRNA in AB, OKC, and oral normal mucosa were 94.4% (51/54), 87.5% (14/16), 1/7, respectively. There was significant statistical difference (P < 0.001). About clinicalpathology of AB, there was no difference for hTERT expression (P > 0.05) hTERT mRNA was positive in peripheral and stellate reticula cells. CONCLUSIONS: (1) hTERT activity plays an important role in genesis, development of AB. (2) hTERT positive rate is related to cell differentiation and clinical biological behavior.