NOD2上调自噬抑制舌鳞癌细胞增殖和迁移

目的:探讨NOD2在雷帕霉素(Rap)诱导下上调舌鳞癌SCC-15细胞自噬对增殖和迁移能力的影响。方法:NOD2表达载体转染SCC-15细胞上调NOD2表达,NOD2-shRNA载体转染SCC-15细胞,抑制NOD2表达;应用Rap诱导SCC-15细胞正常组、NOD2上调组和抑制组的细胞自噬活性,采用Western blot检测自噬标记蛋白LC3和Beclin-1表达变化;MTT法检测NOD2对自噬诱导后细胞增殖的影响;划痕实验检测NOD2对自噬诱导后细胞迁移能力的变化。结果:Rap诱导NOD2上调组细胞中LC3-II和Beclin-1表达显著增强(P<0.05)、诱导NOD2抑制组细胞中LC3-II和Beclin-1表达显著降低(P<0.05)。与对照组相比,Rap诱导NOD2上调组细胞生长明显抑制(P<0.05),迁移速率减慢;诱导NOD2抑制组细胞增殖加快(P<0.05),迁移速率增快。结论:NOD2可上调舌鳞癌SCC-15细胞自噬抑制其增殖和迁移。     

沉默Beclin1基因抑制自噬促进舌鳞状细胞癌细胞增殖及侵袭转移

目的 探讨抑制自噬基因Beclin1表达对舌鳞状细胞癌(以下简称舌鳞癌)细胞增殖及侵袭转移的影响,了解舌鳞癌侵袭转移的调控机制.方法 利用RNAi技术,针对人cDNA序列设计Beclin1干扰序列,用脂质体Lip02000包裹后转染至舌鳞癌UM2细胞.实验设空白对照组、脂质体2000(Lip02000)组、阴性siRNA组和Beclin1 siRNA组,通过蛋白印迹法检测Beclin1、LC3的表达变化;CCK-8法检测细胞增殖能力变化;Transwell小室检测细胞迁移和侵袭能力改变;SPSS13.0统计软件进行数据分析.结果 转染Beclin1 siRNA对UM2细胞Beclin1有显著敲减作用(P＜0.05),自噬标记蛋白LC3-Ⅱ的表达明显降低(P＜0.05),细胞增殖较对照组增快(P＜0.05),细胞迁移和侵袭转移能力明显增强.结论 沉默Beclin1表达可下调舌鳞癌细胞自噬水平,并促进舌鳞癌细胞增殖和侵袭能力.     

p75NTR对舌鳞癌Tca8113细胞凋亡的影响

目的:探讨p75NTR基因对舌鳞癌Tca8113细胞凋亡的影响。方法:流式细胞技术分选Tca8113细胞系中p75NTR阳性细胞及阴性细胞,对阳性细胞用脂质体瞬时转染荧光标记的p75NTR siRAN,实时定量RT-PCR检测p75NTR基因,western blot检测p75NTR蛋白表达;流式细胞仪Annexin V/PI双染色标记法进行凋亡检侧;MTT检测细胞增殖的影响。结果:p75NTR表达阳性的Tca8113细胞经p75NTR siRNA转染后p75TNR的表达被抑制;细胞凋亡率明显增加(P<0.05),细胞增殖率明显降低。结论:p75NTR在Tca8113细胞凋亡中具有调控作用。     

缺氧下激活成骨细胞自噬对细胞增殖的影响

目的探讨缺氧环境下诱导成骨细胞自噬对其增殖的影响。方法应用CoCl2制备细胞缺氧模型,蛋白质免疫印迹和细胞免疫荧光法检测自噬标记蛋白LC3表达,透射电镜检测自噬小体;MTT法和流式细胞术检测自噬诱导对细胞增殖的影响。结果 CoCl2处理后3h自噬体双膜形成蛋白LC3-II表达开始升高,在6h达到最高值,随后表达水平下降。免疫荧光结果显示,实验组LC3蛋白在细胞质中表达,强度高于对照组。透射电境观察结果显示,在实验组中有自噬小体形成。与对照组相比,CoCl2作用后细胞生长受抑制,12h达到峰值,随后抑制能力减弱（P＜0.05）;流式细胞术检测显示G1期细胞增多,同时S期及G2期细胞减少。结论缺氧环境可激活成骨细胞自噬活性从而抑制细胞增殖。     

岩黄连总碱对Tca8113细胞增殖和凋亡作用的影响

目的:观察岩黄连总碱对体外培养人舌鳞癌Tca8113细胞增殖抑制及诱导凋亡作用。方法:MTT法检测不同浓度的岩黄连总碱分别处理体外培养的Tca8113细胞24、48和72 h后的细胞增殖抑制情况,Hochest33258染色及DNA ladder检测细胞凋亡,并用脱氧核苷酸转移酶介导的dUTP缺口末端标记法(TUNEL法)原位检测细胞凋亡及细胞凋亡率。结果:岩黄连总碱对Tca8113细胞增殖具有明显抑制作用(P<0.01),且呈现出一定的时间和浓度依赖性;Hochest33258检测发现岩黄连总碱作用48 h后可见凋亡细胞;DNA ladder检测可见凋亡特有的180～200 bp整数倍DNA条带;TUNEL结果显示岩黄连总碱处理组细胞凋亡率呈时间和浓度依赖性。结论:岩黄连总碱能抑制Tca8113细胞增殖,呈时间和浓度依赖性;同时能诱导Tca8113细胞凋亡,且诱导凋亡的作用也呈时间和浓度依赖性。     

VEGF靶向RNA干扰质粒构建及其对人舌鳞癌Tca8113细胞的影响

目的：用RNA干扰技术阻断人舌鳞癌系Tca8113细胞中VEGF基因的表达,观察细胞增殖及凋亡特征。方法：检测人舌鳞癌系Tca8113细胞中血管内皮生长因子VEGF表达水平;采用真核转录质粒pRNA-U6.1/Neo构建针对VEGF基因的重组转染质粒。将4种不同序列的VEGF-shRNAV1、VEGF-shRNAV2、VEGF-shRNAV3、VEGF-shRNAV4质粒以及含与VEGF无关序列的VEGF-shRNAVc和空白质粒VEGF-shRNAU6分别转染Tca8113细胞,48h后检测其VEGF表达水平,筛选稳定转染RNAi-VEGF的细胞;CCK8检测其增殖能力;流式细胞仪检测其细胞周期;Anexin-V-PI检测其凋亡特征。结果：RT-PCR和Western blot检测：Tca8113细胞阳性表达VEGF;用Lipofectamine 2000成功将不同VEGF片段的质粒转染入Tca8113细胞;RT-PCR发现,VEGF-shR-NAV2组细胞VEGF表达被显著抑制,用400ng/mLG418压力筛选获得VEGF稳定被抑制的细胞系;CCK8检测各组Tca8113细胞增殖见VEGF-shRNAV2组增殖能力小于VEGF-shRNAVc组和VEGF-shRNAU6组;转染VEGF-shRNAV2的Tca8113细胞G0-G1期细胞较VEGF-shRNAVc组和VEGF-shRNAU6组高,且细胞凋亡多。结论：用RNA靶向干扰能明显降低人舌鳞癌Tca8113细胞内VEGF的表达并抑制肿瘤细胞增殖及促进凋亡。     

β-catenin表达下调对舌鳞状细胞癌Tca8113细胞周期、细胞凋亡和细胞迁移的影响

目的：探讨β-catenin表达下调对Tca8113细胞增殖、周期、凋亡和迁移的影响。方法：用脂质体2000将β-catenin siRNA转染舌鳞状细胞癌Tca8113细胞,Western blotting技术检测转染后Tca8113细胞中β-catenin蛋白的表达,CCK-8试剂分析转染后对细胞增殖能力的影响;流式细胞术检测下调β-catenin表达对Tca8113细胞周期及细胞凋亡的影响;Boyden chamber实验分析β-catenin表达下调对Tca8113细胞迁移能力的影响。结果：β-catenin siRNA能明显下调Tca8113细胞中β-catenin蛋白的表达,显著抑制Tca8113细胞的增殖。β-catenin siRNA组中的G0/G1期的细胞百分比明显高于未处理组和对照siRNA组。此外,β-catenin siRNA组中细胞凋亡的比率明显高于未处理组和对照siRNA组,其凋亡变化与caspase-3和bax蛋白表达的上调和bcl-2表达的下降密切相关。与未处理组和对照siRNA组相比,β-catenin siRNA组中Tca8113细胞的迁移能力显著下降,组间具有统计学意义。结论：β-catenin在舌鳞状细胞癌的发生发展中可能具有重要的作用。     

内质网应激诱导的TRB3在人舌体鳞状细胞癌细胞中抑制AKT磷酸化

目的:研究在人舌体鳞状细胞癌发生内质网应激后,TRB3与AKT磷酸化的关系。方法:在人舌体鳞癌细胞Tca8113及CAL-27中,使用毒胡萝卜素或衣霉素诱导内质网应激,采用腺病毒质粒转染及短发夹RNA干扰技术验证TRB3与AKT磷酸化的关系。结果:Tca8113及CAL-27细胞通过毒胡萝卜素或衣霉素诱导24h后,TRB3mRNA及蛋白表达升高。在Tca8113细胞中,通过腺病毒质粒转染上调TRB3蛋白表达后,磷酸化AKT蛋白表达下降;通过短发夹RNA干扰下调TRB3蛋白表达后,磷酸化AKT蛋白表达升高。结论:在人舌体鳞癌细胞发生内质网应激后,TRB3蛋白表达上调并且抑制AKT磷酸化。     

SPHK1在舌鳞癌中的表达及其表达下调对Tca8113细胞迁移能力的影响

目的:研究鞘氨醇激酶1(SPHK1)在舌鳞癌组织中的表达及其表达下调对Tca8113细胞迁移的影响。方法:采用免疫组织化学检测45例舌鳞癌组织、36例癌旁异常增生组织和45例正常舌上皮组织中SPHK1蛋白的表达。利用脂质体2000将SPHK1 siRNA和对照siRNA分别转染Tca8113细胞,Western blotting检测细胞中SPHK1蛋白的表达;分别采用CCK-8和Boyden小室检测细胞增殖和细胞迁移能力的变化;用Western blotting检测细胞迁移相关蛋白MMP-2和MMP-9表达的变化。结果:舌鳞癌组织中SPHK1蛋白的表达显著高于癌旁异常增生组织和正常舌上皮组织(χ2=55.608,P=0.000)。SPHK1 siR-NA能显著下调Tca8113细胞中SPHK1蛋白的表达,其表达下调能明显抑制舌鳞癌细胞的增殖和降低细胞的迁移能力。SPHK1表达的下调能明显降低舌鳞癌细胞中MMP-2和MMP-9蛋白的表达。结论:SPHK1的过表达可能在舌鳞癌的发生发展过程中发挥重要作用,其表达下调介导的舌鳞癌细胞迁移能力的降低可能与MMP-2和MMP-9的下调密切相关。     

Cox-2在舌鳞癌细胞Tca8113增殖机制中的作用

目的:观察并探讨Cox-2在舌鳞癌细胞(Tca8113)增殖机制中的作用。方法:通过免疫细胞化学检测Cox-2在Tca8113细胞中的表达;再通过建立裸鼠荷瘤模型及应用Cox-2特异性抑制剂(SC236)进行干预的方法,观察SC236对Tca8113细胞的增殖活性、致瘤性和成瘤速度的影响。结果:在Tca8113细胞中存在Cox-2的表达;将Tca8113细胞接种于裸鼠颈部皮下可成功诱导出组织学形态与人舌鳞癌基本一致、且表达Cox-2的移植瘤。SC236能够显著抑制Tca8113细胞及其诱导的移植瘤的生长(P<0.01),并明显延缓Tca8113细胞的成瘤速度(P<0.05)。结论:Cox-2在Tca8113细胞的增殖过程中可能发挥重要作用;Cox-2特异性抑制剂可显著抑制Tca8113细胞及其诱导的移植瘤的增殖和生长。     

Stem cell patterns in cell lines derived from head and neck squamous cell carcinoma

The initiation, growth, recurrence and metastasis of solid tumours, including squamous cell carcinoma of the head and neck region, have been related to the behaviour of a small subpopulation of 'tumour-initiating' cells. Cells with stem cell characteristics have also been identified in cell lines derived from cancers and the aim of the present work was to extend examination of such cells. Established cell lines were examined for their patterns of colony morphologies and staining, the presence of a Hoechst dye-excluding 'side population', expression of the putative stem cell markers CD44, CD133 and CD29, and their ability to grow as 'cancer spheroids'. Two cell lines, CaLH2 and CaLH3, recently generated from HNSCC tumour biopsies, were similarly examined. All cell lines showed a holoclone/meroclone/paraclone series of colony morphologies and cell sorting indicated that CD44 marker expression was related to clonogenicity. FACS analysis after exposure to Hoechst dye indicated that the CA1, H357 and UK1 cell lines contain a dye-excluding 'side population', a property associated with stem-like subpopulations. When held in suspension, all cell lines formed spheroids that could be re-passaged. These observations indicate that cell lines derived from HNSCC contain cells with stem cell properties and that such cell lines may provide experimental systems relevant to the behaviour of stem cells present in the tumours of origin and to their responses to therapy.     

树突细胞及其功能和疫苗的研究现状

树突细胞(DC)可引发初次免疫应答,在机体免疫抗瘤中起着重要的作用.头颈鳞状细胞癌(HNSCC)局部不同表型的DC浸润与肿瘤预后密切相关.本文就DC的亚型,DC浸润的程度及其与肿瘤预后的相关性,HNSCC患者肿瘤组织、淋巴结和外周血中DC的数目、成熟度和功能异常,DC功能受损的原因,DC疫苗等研究现状作一综述.     

The role of NEFL in cell growth and invasion in head and neck squamous cell carcinoma cell lines

The neurofilament light polypeptide (NEFL) gene located on chromosome 8q21 is associated with the cancer of several organs and is regarded as a potential tumor suppressor gene. However, the role of the NEFL protein has not yet been studied in cancer cells. Although evidence suggests that there is a correlation between NEFL expression and cancer, studies regarding the role of the NEFL protein have been mostly limited to neurological diseases, such as Charcot–Marie–Tooth's disease (CMT). Most of these studies have not explored the role of NEFL in cancer cell apoptosis and/or invasion. In this study, NEFL expression was manipulated, and apoptosis and invasion were compared in head and neck squamous cell carcinoma cell lines. The results show that the expression of NEFL induces cancer cell apoptosis and inhibits invasion in these cell lines, suggesting that NEFL may play a role in cancer cell apoptosis and invasion.     

Extent and diversity of inflammatory cell infiltrates in squamous cell carcinomas and basal cell epitheliomas of the head and neck

Using monoclonal antibodies reactive with Langerhans' cells (LCs), macrophages, and T cell subpopulations, the density and proportions of cells of the immune system of the normal oral mucosa were determined immunohistochemically, and compared with findings in oral squamous cell carcinomas (SCC) and basal cell epitheliomas (BCE). In normal oral epithelia, the dominant cell type was the LC, positive for CD 1, and expressing HLA-DR antigens (DR+). Many intraepithelial cells were lymphocytes of the suppressor/cytotoxic phenotype (CD 8+), which was also the most prominent cell type in the normal mucosal stroma. Significant differences were observed for the content of CD 8-, OKM 1-, and CD 4-positive cells in the epithelium of normal oral mucosa, SCC, and BCE, and for the amount of CD 1-positive Langerhans cells in the connective tissue of the different groups of tissues. When CD 4/CD 8 ratios were calculated, differences between SCC and BCE became most evident. A CD 4/CD 8 ratio greater 0.5 was seen to be characteristic for BCE. Thus, in contrast to the striking preponderance of suppressor/cytotoxic lymphocytes (CD 8+) in SCC, BCE showed typically almost balanced numbers of suppressor/cytotoxic (CD 8+) and helper/inducer (CD 4+) lymphocytes. This finding further underlines the biological differences recognized between these most common neoplasias of the head and neck.     

Extent and diversity of inflammatory cell infiltrates in squamous cell carcinomas and basal cell epitheliomas of the head and neck

Using monoclonal antibodies reactive with Langerhans' cells (LCs), macrophages, and T cell subpopulations, the density and proportions of cells of the immune system of the normal oral mucosa were determined immunohistochemically, and compared with findings in oral squamous cell carcinomas (SCC) and basal cell epitheliomas (BCE). In normal oral epithelia, the dominant cell type was the LC, positive for CD 1, and expressing HLA-DR antigens (DR⁺). Many intraepithelial cells were lymphocytes of the suppressor/cytotoxic phenotype (CD 8⁺), which was also the most prominent cell type in the normal mueosal slroma. Significant differences were observed for the content of CD 8-, OKM 1-, and CD 4-positive cells in the epithelium of normal oral mucosa, SCC, and BCE, and for the amount of CD 1-positive Langerhans cells in the connective tissue of the different groups of tissues. When CD 4/CD 8 ratios were calculated, differences between SCC and BCE became most evident. A CD 4/CD 8 ratio greater 0.5 was seen to be characteristic for BCE. Thus, in contrast to the striking preponderance of suppressor/cytotoxic lymphocytes (CD 8⁺) in SCC, BCE showed typically almost balanced numbers of suppressor/cytotoxic (CD 8⁺) and helper/induced (CD 4⁺) lymphocytes. This finding further underlines the biological differences recognized between these most common neoplasias of the head and neck.     

Combined granular cell ameloblastoma and plexiform granular cell odontogenic tumour

Granular cell ameloblastomas are uncommon lesions accounting for about 3-5% of all histologic subtypes of ameloblastoma. The plexiform granular cell odontogenic tumour, on the other hand, is a newly described lesion characterised by a monophasic plexiform pattern of granular cells. This article reports a tumour found occurring in the left mandible of a 67-year-old Indian male which histologically showed features of both the aforementioned lesions.     

神经钙黏素表达下调对舌鳞状细胞癌细胞生物学能力的影响

目的 研究神经钙黏素(N-cadherin)表达下调对舌鳞状细胞癌Tca8113细胞增殖、细胞周期、凋亡以及迁移的影响,并探讨其可能的分子机制.方法 利用LipofectamineTM2000将神经钙黏素siRNA转染舌鳞状细胞癌Tca8113细胞,将细胞分为3组:①未处理组;②对照siRNA组;③神经钙黏素siRNA组.分别收集转染后48 h的细胞,采用新型的细胞计数试剂盒(cell counting kit,CCK)8试剂分析转染神经钙黏素siRNA后对细胞增殖能力的影响;运用流式细胞术检测下调神经钙黏素表达对Tca8113细胞周期及细胞凋亡的影响;采用Boyden 小室实验分析下调神经钙黏素对舌鳞状细胞癌细胞Tca8113细胞迁移能力的影响;进一步采用蛋白质印迹法检测神经钙黏素表达下调对细胞增殖、细胞周期以及细胞迁移相关基因表达的影响.结果 神经钙黏素siRNA能明显下调舌鳞状细胞癌Tca8113细胞中神经钙黏素蛋白的表达,并显著抑制Tca8113细胞的增殖(P<0.05).细胞周期结果显示,神经钙黏素siRNA组中在G0/G1的细胞比率[(65.41±0.92)%]明显高于未处理组[(41.59±1.43)%]和对照siRNA组[(43.70±2.08)%],差异有统计学意义(F=216.839,P＝0.000).神经钙黏素siRNA组中细胞凋亡的比率[(25.66±1.36)%]明显高于未处理组[(2.38±0.14)%]和对照siRNA组[(2.81±0.12)%],差异有统计学意义(F=850.364,P=0.000).Boyden 小室体外侵袭实验结果表明,与未处理组和对照siRNA组相比,神经钙黏素siRNA组中Tca8113细胞的迁移能力显著下降,差异有统计学意义(F=140.858,P=0.000).蛋白质印迹法结果表明,与未处理组和对照siRNA组相比,神经钙黏素siRNA组中的基质金属蛋白酶(matrix metalloproteinases,MMP)2和MMP-9明显下调,而p21明显上调,且差异有统计学意义(P<0.05).结论 神经钙黏素在舌鳞状细胞癌的发生发展中可能具有重要的作用.

Abstract：

Objective To investigate the effect of downregulation of N-cadherin expression on cell proliferation, cell cycle, cell apoptosis and cell migration in tongue squamous cell carcinoma cell line Tca8113 cells. Methods N-cadherin siRNA was transfected into tongue squamous cell carcinoma cell line Tca8113 cells and Tca8113 cells were divided into three groups: untreated group, control siRNA group and N-cadherin siRNA group. The cells were harvested 48 h after transfection with N-cadherin siRNA. Cell proliferation of Tca8113 cells was examined by cell counting kit(CCK)-8 after transfection with N-cadherin, and the effects of downregulation of N-cadherin on cell cycle and cell apoptosis of Tca8113 cells were investigated by flow cytometry.The effect of downregulation of N-cadherin expression on cell migration of Tca8113 cells was observed by Boyden chamber experiment, and further expression changes of gene-related cell proliferation, cell cycle and cell migration were detected by Western blotting. Results N-cadherin siRNA downregulated the N-cadherin expression and significantly inhibited cell proliferation of Tca8113 cells (P<0.05). The results of cell cycle revealed that the percentage of G0/G1 phase in N-cadherin group [(65.41±0.92) %] was significantly higher than that in untreated group [(41.59±1.43)%] or control siRNA group [(43.70±2.08)%], and there was significant difference among the three groups (F=216.839,P＝0.000).The percentage of cell apoptosis in N-cadherin group [(25.66±1.36)%] was significantly higher than that in untreated group [(2.38±0.14)%] or control siRNA group [(2.81±0.12)%], and there was significant difference among the three groups (F=850.364,P=0.000). The cell number migrated into memebrane in N-cadherin group was significantly lower than that in untreated group and control siRNA group, and there was significant difference among the three groups (F=140.858,P=0.000). Further, compared with untreated group and control siRNA group, the expressions of matrix metalloproteinase(MMP)-2 and MMP-9 proteins were significantly downregulated and expression of p21 protein was significantly upregulated (P<0.05). Conclusions N-cadherin may play a role in occurrence and development of tongue squamous cell carcinoma.     

T细胞免疫和细胞凋亡在口腔扁平苔藓发病中的作用

目的通过探讨口腔扁平苔藓（OLP）中细胞凋亡情况及CD4＋、CD8＋T细胞和CD4/CD8比例的变化分析细胞免疫与细胞凋亡的关系,进一步了解OLP的发病机制。方法应用免疫组化SP法检测27例OLP组织中CD4＋、CD8＋T细胞的表达水平,并用原位末端转移酶标记法（TUNEL）定位检测17例OLP中细胞凋亡情况。结果OLP组固有层中CD4＋、CD8＋T细胞明显高于对照组（P＜0.05）,CD4/CD8值降低。OLP组中上皮内细胞凋亡指数高于对照组,固有层淋巴细胞凋亡指数明显低于对照组。结论OLP组固有层中CD4＋、CD8＋T细胞浸润的增加、CD4/CD8比值的变化及OLP中上皮细胞和固有层淋巴细胞凋亡异常,说明细胞免疫功能紊乱和细胞凋亡异常在OLP发病中起重要作用。     

Establishment and characterization of a spindle cell squamous carcinoma cell line

BACKGROUND: Spindle cell squamous carcinoma (SCSC) is a rare and peculiar biphasic malignant neoplasm that occurs mainly in the upper aerodigestive tract. It consists of sarcomatoid proliferation of pleomorphic spindle-shaped cells and squamous cell carcinoma. METHODS: Here, we established a SCSC cell line from a tumour arisen in gingiva. We characterized the feature of a SCSC cell line by immunohistochemistry. To know the biological feature, we examined the cell growth, invasiveness and epithelial-mesenchymal transition markers of a SCSC cell line in comparison with oral squamous cell carcinoma (OSCC) cell lines. RESULTS: By immunohistochemical analyses, the primary tumour expressed cytokeratin and vimentin, indicating carcinosarcoma-like characters. This tumour also showed overexpression of p53 protein. Cultured SCSC cells resulted in bypass of crisis and maintenance over passage 100. The established SCSC cell line was spindle-shaped and showed identical immunohistochemical characters to those of primary tumour cells. Similar to the primary tumour, the cell line showed p53 overexpression and had p53 mutation at codon 132: AAG (lys)-->AAT (asp). The SCSC cell line grew slower than two other OSCC cell lines (MSCC-1 and HSC-2), whereas SCSC cells had remarkable invasiveness in comparison with these cell lines. Moreover, SCSC cells expressed wnt-5a and vimentin mRNA at high levels, but did not express E-cadherin mRNA. This expression pattern of the markers was similar to that of mesenchymal cells, not of epithelial cells. CONCLUSION: In the present study, we newly established a SCSC cell line with strong invasiveness. This is the first report on the establishment of SCSC cell line. The SCSC cell line can be a useful cell model for the study to know the cytodifferentiation and nature of SCSC.     

舌癌单细胞培养建系与癌干细胞相关标志的检测

目的 以舌癌Tca8113M1细胞系单细胞培养建系为基础,观察Tca8113M1细胞系中舌癌干细胞存在的现象及其相关标志的变化规律。方法 选取Tca8113M1细胞系,以有限稀释法进行体外单细胞培养并建立细胞亚系,在证实其成瘤性的基础上,进一步采用流式细胞术检测癌干细胞相关标志CD44、CD184、细胞外可溶性抗原（ESA）的表达情况,着重观察单个细胞培养形成细胞克隆的形态与时间。结果 以有限稀释法获取192个Tca8113M1舌癌单个细胞,在96孔板中进行体外培养,获取12个细胞亚系（获取比例为6.25%）,均有高成瘤性。癌干细胞相关标志CD44 与ESA均为高水平表达,而CD184表达则在12个细胞系之间有差异。在单个细胞培养中,形成完全克隆、部分克隆与旁克隆3种形态,12个细胞亚系均源于单个细胞形成的完全克隆,均可进行连续传代与扩增,而部分克隆与旁克隆则在后续培养中逐渐衰老与消亡。结论 Tca8113M1细胞系中可能存在癌干细胞,而单细胞培养可形成完全克隆并建立细胞亚系,是进行舌癌干细胞后续研究重要的细胞培养模式。