中华耳鼻咽喉头颈外科杂志
中華耳鼻嚥喉頭頸外科雜誌
중화이비인후두경외과잡지
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2015年
11期
929-933
,共5页
景绍武%徐庆%景尚华%赵珍%赵志军%吴凤鹏%刘青%程云杰%王军
景紹武%徐慶%景尚華%趙珍%趙誌軍%吳鳳鵬%劉青%程雲傑%王軍
경소무%서경%경상화%조진%조지군%오봉붕%류청%정운걸%왕군
低氧诱导因子-1,α亚基%鼻咽肿瘤%RNA干扰%钙黏着糖蛋白类%受体,CXCR4
低氧誘導因子-1,α亞基%鼻嚥腫瘤%RNA榦擾%鈣黏著糖蛋白類%受體,CXCR4
저양유도인자-1,α아기%비인종류%RNA간우%개점착당단백류%수체,CXCR4
Hypoxia inducible factor1,alpha subunit%Nasopharyngeal carcinoma%RNA interference%Cadherins%Receptors,CXCR4
目的 探讨低氧诱导因子-1α(hypoxia inducible factor-1 alpha,HIF-1α)在低氧状态下,对人鼻咽癌CNE-1细胞黏附和侵袭能力的影响及其分子机制.方法 CoCl2模拟肿瘤低氧微环境.分别用RT-PCR和酶联免疫吸附法(ELISA)检测不同低氧时相HIF-1α、E-钙黏蛋白和趋化因子受体4(chemokine receptor 4,CXCR4)在mRNA及蛋白水平的表达情况.采用RNA干扰技术沉默HIF-1α检测其对E-钙黏蛋白、CXCR4蛋白表达的影响.分别采用黏附实验和Transwell侵袭实验检测HIF-1α沉默对CNE-1细胞黏附及侵袭能力的影响.结果 CNE-1细胞在低氧条件下,HIF-1 αmRNA表达相对恒定,而蛋白随低氧时间延长其表达明显升高(P <0.05);E-钙黏蛋白在mRNA及蛋白水平表达均显著降低,而CXCR4均显著升高(P<0.05).有效沉默HIF-1α可明显上调E-钙黏蛋白的蛋白表达,下调CXCR4表达.CNE-1细胞的黏附率和侵袭穿膜细胞数明显少(P<0.05).结论 低氧促进鼻咽癌CNE-1细胞中HIF-1α蛋白表达水平升高.有效沉默HIF-1α可降低CNE-1细胞的黏附和侵袭能力,其分子机制可能与上调E-钙黏蛋白、下调CXCR4表达有关.
目的 探討低氧誘導因子-1α(hypoxia inducible factor-1 alpha,HIF-1α)在低氧狀態下,對人鼻嚥癌CNE-1細胞黏附和侵襲能力的影響及其分子機製.方法 CoCl2模擬腫瘤低氧微環境.分彆用RT-PCR和酶聯免疫吸附法(ELISA)檢測不同低氧時相HIF-1α、E-鈣黏蛋白和趨化因子受體4(chemokine receptor 4,CXCR4)在mRNA及蛋白水平的錶達情況.採用RNA榦擾技術沉默HIF-1α檢測其對E-鈣黏蛋白、CXCR4蛋白錶達的影響.分彆採用黏附實驗和Transwell侵襲實驗檢測HIF-1α沉默對CNE-1細胞黏附及侵襲能力的影響.結果 CNE-1細胞在低氧條件下,HIF-1 αmRNA錶達相對恆定,而蛋白隨低氧時間延長其錶達明顯升高(P <0.05);E-鈣黏蛋白在mRNA及蛋白水平錶達均顯著降低,而CXCR4均顯著升高(P<0.05).有效沉默HIF-1α可明顯上調E-鈣黏蛋白的蛋白錶達,下調CXCR4錶達.CNE-1細胞的黏附率和侵襲穿膜細胞數明顯少(P<0.05).結論 低氧促進鼻嚥癌CNE-1細胞中HIF-1α蛋白錶達水平升高.有效沉默HIF-1α可降低CNE-1細胞的黏附和侵襲能力,其分子機製可能與上調E-鈣黏蛋白、下調CXCR4錶達有關.
목적 탐토저양유도인자-1α(hypoxia inducible factor-1 alpha,HIF-1α)재저양상태하,대인비인암CNE-1세포점부화침습능력적영향급기분자궤제.방법 CoCl2모의종류저양미배경.분별용RT-PCR화매련면역흡부법(ELISA)검측불동저양시상HIF-1α、E-개점단백화추화인자수체4(chemokine receptor 4,CXCR4)재mRNA급단백수평적표체정황.채용RNA간우기술침묵HIF-1α검측기대E-개점단백、CXCR4단백표체적영향.분별채용점부실험화Transwell침습실험검측HIF-1α침묵대CNE-1세포점부급침습능력적영향.결과 CNE-1세포재저양조건하,HIF-1 αmRNA표체상대항정,이단백수저양시간연장기표체명현승고(P <0.05);E-개점단백재mRNA급단백수평표체균현저강저,이CXCR4균현저승고(P<0.05).유효침묵HIF-1α가명현상조E-개점단백적단백표체,하조CXCR4표체.CNE-1세포적점부솔화침습천막세포수명현소(P<0.05).결론 저양촉진비인암CNE-1세포중HIF-1α단백표체수평승고.유효침묵HIF-1α가강저CNE-1세포적점부화침습능력,기분자궤제가능여상조E-개점단백、하조CXCR4표체유관.
Objective To investagate the effects of HIF-1α on adhesion and invasion of human nasopharyngeal carcinoma CNE-1 cells under hypoxia and underlying molecular mechanisms.Methods CoCl2 was used to mimic tumor hypoxic microenvironment.mRNA and protein expressions of HIF-1α, E-cadherin and CXCR4 in CNE-1 cells at different hypoxic time phases were detected by RT-PCR and ELISA respectively.The influences of silencing HIF-1α using RNA interference on E-cadherin and CXCR4 expressions were evaluated.Adhesion test Transwell invasion test were used to evaluate the effects of HIF-1α gene silencing on cell adhesion and invasion.Results Under hypoxia, HIF-1α mRNA expression in CNE-1 cells was stable, but its protein expression increased obviously (P < 0.05).Both mRNA and protein expressions of E-cadherin were decreased significantly with prolonged hypoxia, while mRNA and protein expressions of CXCR4 increased significantly (P < 0.05).After silencing HIF-1αgene, expression of E-cadherin protein was up-regulated, but with down-regulated expression of CXCR4 protein, with a decrease significantly in adhesion rate or invasive cell number of CNE-1 cells (P < 0.05).Conclusions Hypoxia can increase HIF-1αprotein expression in nasopharyngeal carcinoma cell line CNE-1.Silencing HIF-1α by RNA interference can reduce inhesion and invasion abilities of CNE-1 cells, which may be mediated by down-regulating E-cadherin expression and up-regulating CXCR4 expression.