IFN-γ联合全反式维A酸对人皮肤鳞状细胞癌SCL-1细胞生长凋亡的影响

目的 探讨IFN-γ联合全反式维A酸(ATRA)在体外对人皮肤鳞状细胞癌SCL-1细胞形态分化、增殖及生长凋亡的影响.方法 SCL-1细胞根据处理因素不同分为,①对照组;②1μmol/L ATRA组;③100 U/ml IFN-γ组;④500 U/ml IFN-γ组;⑤1000 U/ml IFN-γ组;⑥1000 U/ml IFN-γ+1μmol/LATRA组.用噻唑蓝(MTT)和流式细胞仪(FCM)分析细胞增殖及凋亡的变化.透射电镜、1%碘化丙啶染色及倒置相差显微镜观察细胞凋亡形态.结果 细胞的增殖抑制有明显IFN-γ浓度依赖性,其中1000 U/ml浓度抑制作用最明显.ATRA及IFN-γ能诱导SCL-1细胞凋亡,凋亡率分别是4.84%和11.96%,二者联合诱导凋亡率为18.71%;透射电镜及1%碘化丙啶染色可见1 μmol/L ATRA和1000 U/ml IFN-γ处理的SCL-1细胞发生一系列凋亡特征性的形态学改变,并见较多早期凋亡细胞.IFN-γ及ATRA诱导SCL-1细胞形态呈双极性改变,趋向良性分化.结论 IFN-γ可促进SCL-1细胞分化,抑制其增殖,在一定范围内有剂量依赖性,且与ATRA具有协同作用.

Abstract：

Objective To investigate the in vitro effect of interferon-γ (IFN-γ) and ATRA on the morphological transition, proliferation of and apoptosis in a human cutaneous squamous cell carcinoma cell line SCL-1. Methods Cultured SCL-1 cells were divided into 6 groups to be treated with ATRA of 1 μmol/L, various concentrations ( 100, 500, 1000 U/ml) of IFN-γ, the combination of ATRA of 1 μmol/L and IFN-y of 1000 U/ml,respectively, or to remain untreated. MTT assay and flow cytometry were performed to evaluate the cell proliferation and apoptosis. The morphological features of apoptotic cells were observed by a transmission electron microscope (TEM) and inverted phase contrast microscope after 1% propidium iodide staining. Results IFN-γ could inhibit the proliferation of SCL-1 cells in a dose-dependent manner, and the most pronounced inhibitory effect was observed at a dose of 1000 U/ml . ATRA and IFN-γ induced an apoptosis in SCL-1 cells, and the early apoptosis rate was 4.84%, 11.96% and 18.71% in SCL-1 cells after treated with ATRA of 1 μmol/L, IFN-γ of 1000 U/ml and their combination, respectively. A series of morphological changes characteristic of apoptosis,such as bipolar changes, were observed in SCL-1 cells treated with ATRA and IFN-γ, with the presence of many early apoptotic cells, which showed a trend towards benign differentiation. Conclusions Within a certain concentration range, IFN-γcan promote the differentiation, but inhibit the proliferation of SCL-1 cells in a dose-dependent manner, and ATRA could enhance the effects of IFN-γ.     

CpG ODN刺激的寻常性银屑病中性粒细胞培养上清液对HaCaT细胞增殖的影响

Objective To investigate the role of nentrophils in the pathogenesis of psoriasis vulgaris. Methods Neutrophils were isolated from venous blood samples of 25 patients with psoriasis vulgaris (including 13 cases of active psoriasis and 12 cases of inactive psoriasis) as well as 25 normal human con-trols, and cultured. Then, these neutrophils were grouped and treated with lipopolysaccharide (LPS, 100 g/L),CpG-A (50 mg/L), CpG-B (50 mg/L), and RPMI 1640 culture medium, respectively, for 24 hours followed by the collection of culture supematants. Human keratinocytes (HaCaT) were cultured in the presence of su-pematants of treated or untreated nentrophils for 72 hours followed by the detection of cell proliferation with MTT assay. To determine the role of proinflammatory factors, SOD/CAT and monoclonal antibody to IL-8 and TNF-alpha of 400 u/mL were used to pretreat HaCaT cells 1 hour prior to the stimulation with super-natants of neutrophils. Results Compared with culture medium, the supematant of unstimulated neutrophils from normal controls or patients with inactive psoriasis had no significant effect on the proliferation of HaCaT cells (P ＞ 0.05), but that from patients with active psoriasis markedly promoted the proliferation of HaCaT cells (t = 2.41, P < 0.05). ARe, stimulation by LPS, CpG-A and CpG-B, the supematant of active patient-derived neutrophils significantly promoted the proliferation of HaCaT cells compared with that of normal control-derived nentrophils (t = 3.11, 2.89, 2.29, respectively, all P < 0.05). In comparison with tmstimulated neutrophils, the supematant from LPS- and CpG-A stimulated nentrophiles significantly accelerated the pro-liferation of HaCaT cells. Furthermore, the proliferation of HaCaT cells induced by the supematants of LPS-,CpG-A-, CpG-B-stimulated neutrophils from psoriatic patients was statistically suppressed by the pretreat-ment with the monoclonal antibody to IL-8, TNF-alpha and SOD/CAT (all P < 0.05). Conclusions In patients with psoriasis vulgaris, there is an abnormal secretion of IL-8, TNF-alpha and superoxide by neutrophils in peripheral blood, and these proinflammatory factors could promote the proliferation of HaCaT cells.     

CpG ODN刺激的寻常性银屑病中性粒细胞培养上清液对HaCaT细胞增殖的影响

Objective To investigate the role of nentrophils in the pathogenesis of psoriasis vulgaris. Methods Neutrophils were isolated from venous blood samples of 25 patients with psoriasis vulgaris (including 13 cases of active psoriasis and 12 cases of inactive psoriasis) as well as 25 normal human con-trols, and cultured. Then, these neutrophils were grouped and treated with lipopolysaccharide (LPS, 100 g/L),CpG-A (50 mg/L), CpG-B (50 mg/L), and RPMI 1640 culture medium, respectively, for 24 hours followed by the collection of culture supematants. Human keratinocytes (HaCaT) were cultured in the presence of su-pematants of treated or untreated nentrophils for 72 hours followed by the detection of cell proliferation with MTT assay. To determine the role of proinflammatory factors, SOD/CAT and monoclonal antibody to IL-8 and TNF-alpha of 400 u/mL were used to pretreat HaCaT cells 1 hour prior to the stimulation with super-natants of neutrophils. Results Compared with culture medium, the supematant of unstimulated neutrophils from normal controls or patients with inactive psoriasis had no significant effect on the proliferation of HaCaT cells (P ＞ 0.05), but that from patients with active psoriasis markedly promoted the proliferation of HaCaT cells (t = 2.41, P < 0.05). ARe, stimulation by LPS, CpG-A and CpG-B, the supematant of active patient-derived neutrophils significantly promoted the proliferation of HaCaT cells compared with that of normal control-derived nentrophils (t = 3.11, 2.89, 2.29, respectively, all P < 0.05). In comparison with tmstimulated neutrophils, the supematant from LPS- and CpG-A stimulated nentrophiles significantly accelerated the pro-liferation of HaCaT cells. Furthermore, the proliferation of HaCaT cells induced by the supematants of LPS-,CpG-A-, CpG-B-stimulated neutrophils from psoriatic patients was statistically suppressed by the pretreat-ment with the monoclonal antibody to IL-8, TNF-alpha and SOD/CAT (all P < 0.05). Conclusions In patients with psoriasis vulgaris, there is an abnormal secretion of IL-8, TNF-alpha and superoxide by neutrophils in peripheral blood, and these proinflammatory factors could promote the proliferation of HaCaT cells.     

CpG ODN刺激的寻常性银屑病中性粒细胞培养上清液对HaCaT细胞增殖的影响

Objective To investigate the role of nentrophils in the pathogenesis of psoriasis vulgaris. Methods Neutrophils were isolated from venous blood samples of 25 patients with psoriasis vulgaris (including 13 cases of active psoriasis and 12 cases of inactive psoriasis) as well as 25 normal human con-trols, and cultured. Then, these neutrophils were grouped and treated with lipopolysaccharide (LPS, 100 g/L),CpG-A (50 mg/L), CpG-B (50 mg/L), and RPMI 1640 culture medium, respectively, for 24 hours followed by the collection of culture supematants. Human keratinocytes (HaCaT) were cultured in the presence of su-pematants of treated or untreated nentrophils for 72 hours followed by the detection of cell proliferation with MTT assay. To determine the role of proinflammatory factors, SOD/CAT and monoclonal antibody to IL-8 and TNF-alpha of 400 u/mL were used to pretreat HaCaT cells 1 hour prior to the stimulation with super-natants of neutrophils. Results Compared with culture medium, the supematant of unstimulated neutrophils from normal controls or patients with inactive psoriasis had no significant effect on the proliferation of HaCaT cells (P ＞ 0.05), but that from patients with active psoriasis markedly promoted the proliferation of HaCaT cells (t = 2.41, P < 0.05). ARe, stimulation by LPS, CpG-A and CpG-B, the supematant of active patient-derived neutrophils significantly promoted the proliferation of HaCaT cells compared with that of normal control-derived nentrophils (t = 3.11, 2.89, 2.29, respectively, all P < 0.05). In comparison with tmstimulated neutrophils, the supematant from LPS- and CpG-A stimulated nentrophiles significantly accelerated the pro-liferation of HaCaT cells. Furthermore, the proliferation of HaCaT cells induced by the supematants of LPS-,CpG-A-, CpG-B-stimulated neutrophils from psoriatic patients was statistically suppressed by the pretreat-ment with the monoclonal antibody to IL-8, TNF-alpha and SOD/CAT (all P < 0.05). Conclusions In patients with psoriasis vulgaris, there is an abnormal secretion of IL-8, TNF-alpha and superoxide by neutrophils in peripheral blood, and these proinflammatory factors could promote the proliferation of HaCaT cells.     

CpG ODN刺激的寻常性银屑病中性粒细胞培养上清液对HaCaT细胞增殖的影响

Objective To investigate the role of nentrophils in the pathogenesis of psoriasis vulgaris. Methods Neutrophils were isolated from venous blood samples of 25 patients with psoriasis vulgaris (including 13 cases of active psoriasis and 12 cases of inactive psoriasis) as well as 25 normal human con-trols, and cultured. Then, these neutrophils were grouped and treated with lipopolysaccharide (LPS, 100 g/L),CpG-A (50 mg/L), CpG-B (50 mg/L), and RPMI 1640 culture medium, respectively, for 24 hours followed by the collection of culture supematants. Human keratinocytes (HaCaT) were cultured in the presence of su-pematants of treated or untreated nentrophils for 72 hours followed by the detection of cell proliferation with MTT assay. To determine the role of proinflammatory factors, SOD/CAT and monoclonal antibody to IL-8 and TNF-alpha of 400 u/mL were used to pretreat HaCaT cells 1 hour prior to the stimulation with super-natants of neutrophils. Results Compared with culture medium, the supematant of unstimulated neutrophils from normal controls or patients with inactive psoriasis had no significant effect on the proliferation of HaCaT cells (P ＞ 0.05), but that from patients with active psoriasis markedly promoted the proliferation of HaCaT cells (t = 2.41, P < 0.05). ARe, stimulation by LPS, CpG-A and CpG-B, the supematant of active patient-derived neutrophils significantly promoted the proliferation of HaCaT cells compared with that of normal control-derived nentrophils (t = 3.11, 2.89, 2.29, respectively, all P < 0.05). In comparison with tmstimulated neutrophils, the supematant from LPS- and CpG-A stimulated nentrophiles significantly accelerated the pro-liferation of HaCaT cells. Furthermore, the proliferation of HaCaT cells induced by the supematants of LPS-,CpG-A-, CpG-B-stimulated neutrophils from psoriatic patients was statistically suppressed by the pretreat-ment with the monoclonal antibody to IL-8, TNF-alpha and SOD/CAT (all P < 0.05). Conclusions In patients with psoriasis vulgaris, there is an abnormal secretion of IL-8, TNF-alpha and superoxide by neutrophils in peripheral blood, and these proinflammatory factors could promote the proliferation of HaCaT cells.     

CpG ODN刺激的寻常性银屑病中性粒细胞培养上清液对HaCaT细胞增殖的影响

Objective To investigate the role of nentrophils in the pathogenesis of psoriasis vulgaris. Methods Neutrophils were isolated from venous blood samples of 25 patients with psoriasis vulgaris (including 13 cases of active psoriasis and 12 cases of inactive psoriasis) as well as 25 normal human con-trols, and cultured. Then, these neutrophils were grouped and treated with lipopolysaccharide (LPS, 100 g/L),CpG-A (50 mg/L), CpG-B (50 mg/L), and RPMI 1640 culture medium, respectively, for 24 hours followed by the collection of culture supematants. Human keratinocytes (HaCaT) were cultured in the presence of su-pematants of treated or untreated nentrophils for 72 hours followed by the detection of cell proliferation with MTT assay. To determine the role of proinflammatory factors, SOD/CAT and monoclonal antibody to IL-8 and TNF-alpha of 400 u/mL were used to pretreat HaCaT cells 1 hour prior to the stimulation with super-natants of neutrophils. Results Compared with culture medium, the supematant of unstimulated neutrophils from normal controls or patients with inactive psoriasis had no significant effect on the proliferation of HaCaT cells (P ＞ 0.05), but that from patients with active psoriasis markedly promoted the proliferation of HaCaT cells (t = 2.41, P < 0.05). ARe, stimulation by LPS, CpG-A and CpG-B, the supematant of active patient-derived neutrophils significantly promoted the proliferation of HaCaT cells compared with that of normal control-derived nentrophils (t = 3.11, 2.89, 2.29, respectively, all P < 0.05). In comparison with tmstimulated neutrophils, the supematant from LPS- and CpG-A stimulated nentrophiles significantly accelerated the pro-liferation of HaCaT cells. Furthermore, the proliferation of HaCaT cells induced by the supematants of LPS-,CpG-A-, CpG-B-stimulated neutrophils from psoriatic patients was statistically suppressed by the pretreat-ment with the monoclonal antibody to IL-8, TNF-alpha and SOD/CAT (all P < 0.05). Conclusions In patients with psoriasis vulgaris, there is an abnormal secretion of IL-8, TNF-alpha and superoxide by neutrophils in peripheral blood, and these proinflammatory factors could promote the proliferation of HaCaT cells.     

miR-195靶向MYB激活PI3K-Akt通路调控皮肤鳞癌细胞增殖与恶性转移

 目的:探讨微小RNA-195（miR-195）对皮肤鳞癌细胞增殖与恶性转移的影响及其机制。方法:通过实时荧光定量PCR（RT-qPCR）检测miR-195和MYB基因在皮肤鳞癌细胞（A431细胞）和人正常皮肤细胞（HaCaT细胞）中的表达。CCK-8实验检测过表达及下调miR-195对A431细胞增殖能力的影响;Western blot检测过表达及下调miR-195对A431细胞凋亡相关蛋白Bcl-2相关蛋白X（Bax）、B淋巴细胞瘤-2（Bcl-2）表达的影响;Western blot分析过表达及下调miR-195对A431细胞上皮细胞-间充质转化（EMT）的影响。TargetScan和双荧光素酶报告基因实验分析miR-195和MYB之间的关系,分析下调MYB对A431细胞增殖和EMT的影响。Western blot检测过表达MYB后对PI3K-Akt通路的影响。LY294002作用细胞后,检测过表达MYB对A431细胞增殖和EMT的影响。结果：与HaCaT细胞相比,A431细胞中miR-195表达明显下调（P<0.01）,MYB表达明显上调（P<0.01）。过表达miR-195抑制A431细胞增殖与EMT,促进细胞凋亡,下调miR-195则起到相反作用;miR-195和MYB具有靶向和负调控关系;下调MYB的表达抑制A431细胞增殖与EMT;过表达MYB激活细胞内PI3K Akt通路,且通过该通路促进A431细胞增殖与EMT。结论：miR-195通过靶向MYB激活PI3K-Akt通路调控A431细胞的增殖和转移。     

miR-196-5 p靶向HOXA5激活JAK/STAT通路促进皮肤鳞状细胞癌的增殖、侵袭及EMT

目的:探讨miR-196-5p对皮肤鳞状细胞癌(CSCC)增殖、侵袭和EMT的影响及其潜在的作用机制.方法:利用实时荧光定量PCR(RT-qPCR)检测miR-196-5 p在癌旁正常组织、CSCC组织、A431细胞和HaCaT细胞中的表达水平.过表达或下调miR-196-5 p在A431细胞中的表达后,通过CCK-8...     

lncRNA UCA1通过激活miR-143/HK2通路促进皮肤鳞状细胞癌A431细胞增殖、侵袭和EMT

目的:探讨长链非编码RNA UCA1(lncRNA UCA1)在皮肤鳞状细胞癌A431细胞中的表达及其对A431细胞增殖、侵袭及其上皮间质转化(EMT)的影响.方法:通过RT-qPCR检测皮肤鳞状细胞癌、癌旁正常组织、A431细胞、HaCaT细胞中lncRNA UCA1的表达;siRNA技术下调lncRNA UCA1表...     

核基质附着区结合蛋白与皮肤鳞状细胞癌的相关性研究

目的 探讨核基质附着区结合蛋白（MARBP）与皮肤鳞状细胞癌（SCC）的相关性,筛选相关性较高的MARBP。方法 以取材自2例SCC患者正常皮肤组织和HaCaT细胞作为对照,应用RT-PCR方法,检测部分已知与肿瘤相关的MARBP（CUX1、Lamin B1、Nucleolin、hnRNP U、SAFB2、SATB1、YBX1）mRNA在12例SCC肿瘤组织和瘤旁组织、人皮肤鳞状细胞癌细胞系Colo-16细胞、人表皮癌A431细胞的表达水平。结果 所有被检测的MARBP mRNA在2例正常皮肤组织均未见明显表达,在12例SCC肿瘤组织和瘤旁组织、Colo-16、A431细胞系中均有不同程度和不同比例的表达,在HaCaT细胞系中,除SATB1外,其余MARBP mRNA均有表达。SCC肿瘤组织和瘤旁组织MARBP mRNA表达水平的比较显示CUX1、Nucleolin和YBX1差异有统计学意义;Lamin B1、hnRNP U、SAFB2和SATB1差异无统计学意义。结论 CUX1、Nucleolin和YBX1等MARBP mRNA可能参与SCC的发生、发展。     

CXCR7在常见皮肤恶性肿瘤及其细胞株中的表达及意义

目的 探讨趋化因子受体CXCR7在皮肤鳞状细胞癌、基底细胞癌、侵袭性皮肤黑素瘤及其细胞株中的表达及其意义。方法 收集30例皮肤鳞状细胞癌、25例基底细胞癌、30例皮肤黑素瘤的癌组织,采用免疫组织化学方法,检测CXCR7蛋白表达水平。采用RT-PCR、细胞免疫组化方法检测CXCR7在A375、M14、A431、HaCaT细胞株中mRNA及蛋白水平。结果 CXCR7在侵袭性皮肤黑素瘤中表达明显,高表达率为80%（24/30）,皮肤鳞状细胞癌及基底细胞癌分别为26.67%（8/30）、8%（2/25）;皮肤黑素瘤CXCR7高表达率与鳞状细胞癌、基底细胞癌比较,差异均有统计学意义（χ2值分别为17.16和28.36,P值均 < 0.05）。CXCR7 mRNA在A375、M14、A431细胞株中均可检出,其中A375表达最强,而HaCaT细胞不表达;细胞免疫组化显示,仅在A375细胞见棕黄色颗粒着色。结论 皮肤黑素瘤及其细胞株A375高表达CXCR7,其可能参与了其恶性侵袭与转移。     

MiRNA-373在皮肤鳞状细胞癌的表达及对侵袭的影响

目的 分析microRNA-373 (miR-373)在皮肤鳞状细胞癌(鳞癌)组织和细胞中的表达,探讨对皮肤鳞癌细胞侵袭的影响.方法 实时PCR检测皮肤鳞癌组织和细胞中miR-373的表达,将miR-373模拟物、miR-373抑制剂以及阴性对照miRNA转染皮肤鳞癌A431细胞,采用细胞侵袭实验分析miR-373表达下调对细胞侵袭的影响,采用Western印迹分析miR-373表达下调对MMP-2和MMP-9蛋白表达的影响.结果 皮肤鳞癌组织(2.465±0.218)和SCL-1细胞及A431细胞(1.864±0.178,2.919±0.277)中miR-373的表达水平显著高于瘤旁组织和细胞(1.000±0.000),差异有统计学意义(P＜0.05).在转移性的皮肤鳞癌患者(3.323±0.344)中,miR-373的表达显著高于非转移组(1.914±0.161),差异有统计学意义(t=4.158,P＜0.01).与未处理组和阴性对照组相比,miR-373模拟物显著增加皮肤鳞癌A431细胞中miR-373的表达水平和细胞的侵袭能力,而miR-373的抑制剂显著下调皮肤鳞癌A431细胞中miR-373的表达水平和细胞的侵袭,差异有统计学意义(均P＜0.05).结论 MiR-373表达下调显著抑制皮肤鳞癌A431细胞的侵袭,并能显著下调MMP-2和MMP-9蛋白的表达.     

槲皮黄酮通过Sphk2抑制人皮肤鳞状细胞癌A431细胞的增殖

目的：研究槲皮黄酮（Quercetin, Qu）对人皮肤鳞状细胞癌A431细胞增殖活性的影响。方法：采用CCK8法、Western blot实验和流式细胞术检测不同浓度下（10、50、100、200 μg/mL）A431细胞活力、增殖及凋亡相关指标;Western blot检测Qu对A431细胞中Sphk2信号通路的影响。结果：10、50、100、200 μg/mL Qu作用96 h后,细胞OD值分别为（0.654±0.098）、（0.527±0.089）、（0.412±0.076）、（0.309±0.054）;细胞活力分别为（81.3±4.6）%、（56.3±4.9）%、（37.4±4.2）%、（19.4±3.6）%;细胞凋亡率分别为（6.43±1.09）%、（14.77±1.26）%、（21.30±1.36）%、(29.84±1.26)%。Qu呈浓度依赖性的抑制细胞中Sphk2蛋白表达,且Qu+Sphk2 mimics组细胞活力明显高于于Qu,细胞凋亡率明显低于Qu组(Ps<0.05)。结论：Qu可能通过抑制Sphk2信号通路降低人皮肤鳞状细胞癌细胞的增殖活性。     

角质形成细胞μ-阿片受体表达的研究

目的：研究不同特性的角质形成细胞μ-阿片受体的表达情况。方法：以体外培养的角质形成细胞株HaCaT细胞、人鳞状细胞癌(简称鳞癌)细胞株A431、神经母细胞瘤SK-N-SH细胞株为对象，采用逆转录(RT)-PCR方法研究细胞μ-阿片受体的表达。结果：在常规体外培养条件下，角质形成细胞株HaCaT细胞、人鳞癌细胞株A431的RT-PCR结果显示有μ-阿片受体mRNA的表达，后者的表达水平略高于前者。结论：μ-阿片受体在角质形成细胞的表达，为神经系统和皮肤通过神经肽直接发生作用提供依据。     

葡萄糖-6-磷酸脱氢酶的表达抑制对A431细胞增殖和细胞周期的影响

目的研究葡萄糖?6?磷酸脱氢酶（G6PD）表达下调对皮肤鳞状细胞癌（鳞癌）细胞增殖和细胞周期的影响。方法正常培养人永生化上皮细胞HaCaT、皮肤鳞癌SCL?1和A431细胞,采用Western印迹法检测细胞中G6PD蛋白的表达。当A431细胞生长至85%~90%融合时,将siRNA对照（siRNA对照组）和G6PD siRNA（G6PD siRNA组）分别转染A431细胞,未转染的A431细胞则为未转染组。Western印迹法检测3组不同处理的A431细胞中G6PD蛋白及细胞周期蛋白D1、CDK4的表达,CCK?8法检测3组A431细胞的增殖情况,流式细胞仪分析3组A431细胞周期的变化。结果正常培养的2株皮肤鳞癌SCL?1和A431细胞中G6PD蛋白的表达水平（分别为0.308±0.023和0.643±0.046）均显著高于HaCaT细胞（0.100±0.019）,且A431细胞显著高于SCL?1细胞（均P<0.05）。A431细胞G6PD siRNA组G6PD、细胞周期蛋白D1和CDK4蛋白的表达（0.134±0.027、0.154±0.017、0.166±0.017）显著低于未转染组（0.425±0.029、0.344±0.024、0.330±0.020）和siRNA对照组（0.444±0.033、0.350±0.027、0.348±0.018）,差异均有统计学意义（P<0.05）。G6PD siRNA组在24~96 h各时间点的细胞增殖活性均明显低于siRNA对照组和未转染组（P<0.001）,而siRNA对照组与未转染组间细胞增殖差异无统计学意义（均P>0.05）。G6PD siRNA组G0/G1期A431细胞比例显著高于siRNA对照组及未转染组（P<0.001）,而G6PD siRNA组S期A431细胞比例又显著低于siRNA对照组及未转染组（P<0.001）。结论G6PD可能在调控皮肤鳞癌细胞增殖和细胞周期中发挥重要作用。     

黄芩素对A431细胞埃兹蛋白表达及侵袭力的影响

目的 探讨黄芩素是否通过抑制埃兹蛋白来实现抑制A431细胞增殖、细胞周期进程及伪足的形成。方法 采用细胞划痕、微孔滤膜法（Transwell）检测黄芩素对A431细胞爬行的影响;RT－PCR检测黄芩素对A431细胞埃兹蛋白mRNA表达量的影响;Western印迹检测黄芩素及siRNA对A431细胞埃兹蛋白表达及其磷酸化的影响;扫描电镜观察黄芩素及siRNA对A431细胞伪足形成的影响。结果 细胞划痕实验显示,培养24 h时,黄芩素 5、10、20 μmol/L组细胞闭合宽度占原宽度的比例分别为13.3% ± 1.7%、7.6% ± 1.6%和5.9% ± 1.3%,黄芩素呈浓度依赖性抑制A431细胞爬行运动,黄芩素各组与阴性对照组（16.3% ± 2.3%）比较,差异均有统计学意义。Transwell实验证实,5、10、20 μmol/L黄芩素处理A431细胞48 h后,穿过人工基底膜的细胞数量分别为（46.5 ± 3.8）、（34.3 ± 3.4）和（25.3 ± 2.3）个/Hp,各处理组与阴性对照组（56.3 ± 3.8个/Hp）经方差分析,P < 0.01;而与siRNA组（28.3 ± 2.1个/Hp）比较,P > 0.05。Western印迹及RT－PCR检测显示,0、5、10、20、40 μmol/L黄芩素处理A431细胞48 h后,黄芩素呈浓度依赖性地抑制A431细胞埃兹蛋白/磷酸化埃兹蛋白及埃兹蛋白mRNA表达,埃兹蛋白mRNA与β-肌动蛋白mRNA灰度值之比值与阴性对照组比较,P值均 < 0.01;而与siRNA组比较,P > 0.05;埃兹蛋白、磷酸化埃兹蛋白在A431细胞中的表达量（与β-肌动蛋白灰度值之比）与阴性对照组比较,P值均 < 0.01;而40 μmol/L黄芩素处理组与siRNA处理组比较,P > 0.05。扫描电镜显示,48 h后20 μmol/L黄芩素组A431细胞伪足数量为（5.3 ± 1.9）个,长度明显缩短,与阴性对照组（22.6 ± 2.8个）比较,P < 0.01;siRNA组为（4.5 ± 2.8）个,与阴性对照组比较,P > 0.05。结论 黄芩素可能通过直接或间接抑制埃兹蛋白表达及其磷酸化而抑制A431细胞的增殖、爬行,从而达到抗肿瘤增殖及浸润转移的目的。