ABSTRACT
OBJECTIVES: To explore the relationship between the height of alveolar bone resorption and sex and age in the adolescent dentition. METHODS: Multi-slice computed tomography (MSCT) was used to measure the height of alveolar bone resorption at labial, lingual, mesial and distal sites of teeth in 149 adolescents aged from 10 to 20 years. SPSS 25.0 software was used to analyze the relationship between the height of alveolar bone resorption and sex and age. RESULTS: There was no significant difference in the height of alveolar bone resorption between sex (P>0.05). The height of alveolar bone resorption was positively correlated with age in all types of teeth. The model constructed by combining the alveolar bone resorption height data of four sites (y=2.569x1+3.106x2+4.108x3+1.451x4-0.082, R2max=0.756)had a better ability to infer age than that of combining two sites (y=5.942x1+4.489x2+0.612, R2max=0.706) and a single site (R2max=0.638). CONCLUSIONS: The height of alveolar bone resorption is positively correlated with the age of adolescents. The combination of four sites has a stronger ability to infer the relationship between the height of alveolar bone resorption and age in adolescents and has higher accuracy in practical application.
Subject(s)
Alveolar Process , Bone Resorption , Humans , Adolescent , Child , Young Adult , Adult , Alveolar Process/diagnostic imaging , Cone-Beam Computed Tomography , Bone Resorption/diagnostic imaging , Tomography, X-Ray ComputedABSTRACT
The aim of the present study was to identify the differentially expressed microRNAs (miRs) in cervical carcinoma (CC) tissues and cells and to explore the function of miR302c3p and miR520a3p in the proliferation of CC cells. Potential dysregulated miRNAs in CC tissues and tumouradjacent tissues were detected. Reverse transcriptionquantitative PCR (RTqPCR) was performed to determine the expression of miR302c3p, miR520a3p and CXCL8 in CC tissues and cell lines. The target genes of the miRNAs were predicted using miRTarBase and verified by luciferase reporter assays. RTqPCR and western blotting were performed to measure the expression of CXC motif ligand (CXCL)8 after transfection. The effect on proliferation was verified by Cell Counting Kit assay and ethynyl2deoxyuridine staining. Flow cytometry was utilised to assess the effect on apoptosis. In the present study, miR302c3p and miR520a3p were markedly downregulated in CC cell lines compared to the normal cervical cell line H8. Functionally, overexpression of miR302c3p and/or miR520a3p inhibited proliferation and promoted the apoptosis of CC cell lines in vitro, while the knockdown of miR302c3p and/or miR520a3p had the opposite effect. Furthermore, miR302c3p and miR520a3p could both bind to CXCL8. Inhibition of CXCL8 in combination with miR302c3p and/or miR520a3p overexpression exerted proliferationsuppressive and apoptosisstimulating effects on CC cells, whereas restoring CXCL8 attenuated the miR302c3p and miR520a3pinduced antiproliferative and proapoptotic effects. miR302c3p and miR520a3p suppress the proliferation of CC cells by downregulating the expression of CXCL8, which may provide a novel target for the treatment of CC.