Correlation of survivin,p53 and Ki-67 in laryngeal cancer Hep-2 cell proliferation and invasion

Objective: To investigate the mechanism of survivin, p53 and Ki-67 on Hep-2 human laryngeal cancer endothelial cell proliferation and invasion. Methods: Laryngeal squamous cell carcinoma and paracancerous normal tissues were collected, total RNA was extracted from tissues, survivin, p53 and Ki-67 gene m RNA expression levels in laryngeal cancer and the adjacent tissues were detected by Real-time PCR. Human laryngeal cancer Hep-2 epithelial cells were selected, survivin gene was overexpressed, and cell proliferation was detected by MTT. p53 and Ki-67 gene expression changes in overexpressed survivin gene were detected by Western blot. Changes in Hep-2 cell invasive ability were studied when survivin was overexpressed as detected by Transwell invasion assay. Results: In the adjacent tissues, survivin, p53 and Ki-67 gene relative expression levels were 1.72 ± 0.9, 13.7 ± 5.7 and 5.7 ± 1.3, respectively; while in cancer tissues, gene relative expression levels were 53.7 ± 8.3, 66.7 ± 5.2 and 61.0 ± 3.1, respectively, which was significantly increased. As detected by MTT, relative cell survival rate within 12 h of survivin overexpression were: load control group,(88.5±1.6)%; overexpressed group,(90.3±1.9)%. Transwell invasion assay results indicated that overexpressed survivin could significantly increase the relative survival rate of cells. Conclusions: Expressions of p53, Ki67 and survivin are increased in cancer; and there is a positive correlation between survivin, p53 and Ki67 expressions in laryngeal carcinoma.

Effect of DRB on the Biological Characteristics of Human Laryngeal Carcinoma Hep-2 Cell Line

In order to study the effect of 5, 6-Dichloro-l-13-D-ribofuranosyl-benzimidazole （DRB） on the biological characteristics of human laryngeal carcinoma Hep-2 cell line in vitro, Hep-2 cells cultured in vitro were treated with different concentrations of DRB. Changes in cell proliferation, apoptotic rate and invasiveness were detected by MTT assay, flow cytometry （FCM） and matrigel in vitro invasion assay, respectively. It was found that DRB inhibited the proliferation of Hep-2 cells in a dose- and time-dependent manner. After being treated with 0, 10, 20, 40, 80 μmmol/L DRB for 24 h, the apoptotic rate in Hep-2 cells was （0.68±0.19）%, （1.95±0.12）%, （8.51±0.26）%, （11.26±0.17）% and （14.99±0.32）%, respectively. The matrigel in vitro invasion assay revealed that DRB began to inhibit the invasion of Hep-2 cells at the concentration of 5 μmmol/L, and with the increase of DRB concentration, the inhibitory effect was enhanced. It was suggested that DRB could influence the essential biological characteristics of Hep-2 cells, inhibit Hep-2 cells proliferation, reduce invasive ability and induce apoptosis of Hep-2 cells.

Relation between the Expression of K-ras in Hep-2 Cells and Development of Laryngeal Carcinoma~*

Objective： To investigate the expression of K-ras in human laryngeal squamous cell carcinoma cell lines （Hep-2） and its significance for establishing a solid foundation for further study of the relationship between human laryngeal squamous cell carcinoma and K-ras gene point mutations. Methods： The expression of K-ras in human laryngeal squamous cell carcinoma cell lines （Hep-2） and human pancreatic carcinoma cell lines （MIAPaCa-2） was detected by using RT-PCR. Results： The expression of K-ras mRNA in Hep-2 and MIAPaCa-2 was strong and positive. Conclusion： The expression of K-ras mRNA in human laryngeal squamous cell carcinoma cell lines （Hep-2） is positive. Development of laryngeal carcinoma might be related to the activation of K-ras gene point mutation.

甘草甜素对喉癌Hep-2细胞侵袭和迁移的影响及机制研究

目的:探究甘草甜素(Gly)对喉癌Hep-2细胞侵袭和迁移的影响及作用机制。方法:体外培养正常人喉黏膜上皮细胞和喉癌Hep-2细胞,实时荧光定量PCR(RT-qPCR)法和蛋白印迹实验检测微小RNA-205-5p(miR-205-5p)、沉默信息调节因子2相关酶3(SIRT3)mRNA和蛋白表达水平。将喉癌Hep-2细胞分为对照组、Gly低浓度组、Gly中浓度组、Gly高浓度组、Gly高浓度+空载质粒组、Gly高浓度+miR-205-5p抑制剂组。各组给予相应浓度的Gly干预或转染对应质粒培养48 h。Transwell实验和划痕实验分别检测各组Hep-2细胞侵袭和迁移能力。RT-qPCR法和蛋白印迹实验检测各组Hep-2细胞miR-205-5p、SIRT3 mRNA和蛋白表达水平。双荧光素酶报告基因实验分析miR-205-5p与SIRT3的靶向关系。结果:与人喉黏膜上皮细胞比较,喉癌Hep-2细胞miR-205-5p水平降低,SIRT3 mRNA和蛋白水平升高(均P<0.05)。与对照组比较,Gly低、中、高浓度组穿膜细胞数和划痕愈合率、SIRT3 mRNA和蛋白水平依次降低,miR-205-5p水平依次升高(均P<0.05)。与Gly高浓度组和Gly高浓度+空载质粒组比较,Gly高浓度+miR-205-5p抑制剂组穿膜细胞数和划痕愈合率、SIRT3 mRNA和蛋白水平升高,miR-205-5p水平降低(均P<0.05)。miR-205-5p可靶向调控SIRT3表达。结论:Gly能够抑制Hep-2细胞侵袭和迁移,其机制可能与上调miR-205-5p表达,进而靶向下调SIRT3表达有关。

Human epidermal growth factor receptor 2 expression level and combined positive score can evaluate efficacy of advanced gastric cancer

BACKGROUND Although treatment options for gastric cancer(GC)continue to advance,the overall prognosis for patients with GC remains poor.At present,the predictors of treatment efficacy remain controversial except for high microsatellite instability.AIM To develop methods to identify groups of patients with GC who would benefit the most from receiving the combination of a programmed cell death protein 1(PD-1)inhibitor and chemotherapy.METHODS We acquired data from 63 patients with human epidermal growth factor receptor 2(HER2)-negative GC with a histological diagnosis of GC at the Cancer Hospital,Chinese Academy of Medical Sciences between November 2020 and October 2022.All of the patients screened received a PD-1 inhibitor combined with chemotherapy as the first-line treatment.RESULTS As of July 1,2023,the objective response rate was 61.9%,and the disease control rate was 96.8%.The median progression-free survival(mPFS)for all patients was 6.3 months.The median overall survival was not achieved.Survival analysis showed that patients with a combined positive score(CPS)≥1 exhibited an extended trend in progression-free survival(PFS)when compared to patients with a CPS of 0 after receiving a PD-1 inhibitor combined with oxaliplatin and tegafur as the first-line treatment.PFS exhibited a trend for prolongation as the expression level of HER2 increased.Based on PFS,we divided patients into two groups:A treatment group with excellent efficacy and a treatment group with poor efficacy.The mPFS of the excellent efficacy group was 8 months,with a mPFS of 9.1 months after excluding a cohort of patients who received interrupted therapy due to surgery.The mPFS was 4.5 months in patients in the group with poor efficacy who did not receive surgery.Using good/poor efficacy as the endpoint of our study,univariate analysis revealed that both CPS score(P=0.004)and HER2 expression level(P=0.015)were both factors that exerted significant influence on the efficacy of treatment the combination of a PD-1 inhibitor and chemotherapy in patients with advanced GC(AGC).Finally,multivariate analysis confirmed that CPS score was a significant influencing factor.CONCLUSION CPS score and HER2 expression both impacted the efficacy of immunotherapy combined with chemotherapy in AGC patients who were non-positive for HER2.

Molecular analysis and anticancer properties of two identified isolates,Fusarium solani and Emericella nidulans isolated from Wady El-Natron soil in Egypt against Caco-2(ATCC) cell line

Objective:To characterize,identify and investigate the anticancer properties of two new soil fungal isolates,Emericella nidulansand Fusarium solani isolated from Wady El-Natron in Egypt against colon cancer Caco-2(ATCCj cell line.Methods:Soil sample was cultured and two strains were chosen for morphological and phenotypical characterization.Partial sequences of the 18s rRNA gene and the internal transcribed spacer region ITS of the two isolates were amplified by PCR.Phylogenetic tree construction and analysis of the resulted multiple sequences from the two fugal isolates were also carried out.In vitro anticancer activity of the two strains was done against colon Caco-2 cancer cell line.Reverse transcription — PCR was carried out to detect level of expression of p53 in Caco-2 cell line.Results:HF.I displayed morphological and genotypic characteristics most similar to that of Fusarium solani while HF.2 was most similar to Emericella nidulans with high similarity of 99%and 97%respectively.The multiple sequence alignment of the two fungal isolates showed that,the maximum identical conserved domains in the 18s rRNA genes were identified with the nucleotide regions of Slst to 399th base pairs,88th to 525th base pairs respectively.While those in the ITS genes were identified with the nucleotide regions of 88th to 463rd and Slst to 274th.The two isolates showed IC<sub>50 value with（6.24±5.21） and（9.84±0.36） μ g/mL) concentrations respectively at 28h.Reverse transcription- PCR indicated that these cells showed high level of expression for p53 mRNA.Conclusions:The morphology and molecular analysis identified HF.1 and HF.2 to be Fusarium solani and Emericella nidulans;new isolates of anticancer producing fungi from Wady El-Natroon city in Egypt.Treatment with the two isolates caused P53 expression in Caco-2 cell line.These two isolates can be used as an anticancer agents.

Expression of Cyclooxygenase-2 in Ovarian Cancer Cell Lines

Summary： To investigate the expression of cyclooxygenase-2 （COX-2） in ovarian cancer cell lines, RT-PCR and immunocytochemistry were used to detect the expression of COX-2 in 5 ovarian cancer cell lines. The expression of COX-2 mRNA and protein was detected in all 5 cell lines. It is suggested that COX-2 is expressed in ovarian cancer cell lines, which provides a Basis for the chemoprevention of ovarian cancer.

Expression of cyclooxygenase-2 mRNA in drug-sensitive cell and drug-resistant strains of ovarian cancer cell lines

Objective： To investigate the expression of cyclooxygenase-2 （COX-2） mRNA in drug-sensitive cell and drugresistant clones of ovarian cancer cell lines. Methods： RT-PCR and immunocytochemistry were used to investigate the expression of cyclooxygenase-2 in 3 clones drug-sensitive and 5 clones drug-resistant ovarian cancer cell. Results： Strong COX-2 mRNA expressions were detected in 3 clones of drug-sensitive cell and weak expressions were detected in 5 clones of drug-resistant cell. The protein expression of COX-2 in drug-sensitive cell was strongly positive reaction in immunocytochemistry stain and there was a weak positive reaction in 5 clones of drug-resistant cell. Conclusion： The expression of COX-2 mRNA in drug-sensitive cell strains is much higher than that in drugresistant strains of ovarian cancer cell lines, providing a basis of the chemoprevention for ovarian cancer.

Quantitative expression of MMP-2 and FN in high metastatic and low metastatic cell lines of breast cancer

To analyze the relation of matrix metalloproteinase-2(MMP-2) and Fibronection (FN) mRNA expression with metastasis of breast cancer and elucidate the role of MMP-2 and FN in breast cancer metastasis.Methods The expression of MMP-2 and FN mRNA in breast cancer cell lines was detected by fluorescence-quantitative RT-PCR.The expression of MMP-2 and FN protein was detected by Western blots.Results The expression of MMP-2 and FN mRNA was down-regulated in high metastatic cell lines MDA-MB-231,MDA-MB-435,but up-regulated in low metastatic cell lines MDA-453,T47D,SK-BR-3 and non-metastatic cell line MCF-7,ZR-75-30.The protein expression of MMP-2 and FN was up-regulated in high mestastic cell lines,and down-regulated in low metastatic cell lines.Conclusion The mRNA and protein expression of MMP-2 and FN was related with breast cancer metastasis.The mRNA expression of MMP-2 and FN is feed-back regulated with protein expression.6 refs,4 figs,2 tabs.

SOX7靶向ERK1/2/PD-L1通路抑制结直肠癌血管生成

目的探讨性别决定区Y框蛋白7(SOX7)对结直肠癌血管生成的影响及潜在作用机制。方法应用免疫荧光检测结直肠癌患者组织样本中SOX7表达水平,之后通过裸鼠、转染SOX7 mimic的人结直肠癌细胞系SW480细胞和人脐静脉内皮细胞(HUVEC)共培养进一步研究。用Western-blot验证SOX7与ERK1/2/PD-L1对结直肠癌细胞的相关蛋白表达的影响。用CCK8检测SOX7与ERK1/2/PD-L1对HUVEC增殖的影响。通过体外内皮细胞成管实验测定SOX7与ERK1/2/PD-L1对肿瘤血管生成的影响。结果SOX7在人结直肠癌组织中表达被抑制(P<0.01),同时SOX7的过表达抑制了小鼠体内肿瘤生长(P<0.01)。SW480细胞中SOX7的过表达抑制了ERK1/2、c-Jun的表达,并在ERK1/2的激动剂Senkyunolide I的作用下上调了SW480细胞的ERK1/2、c-Jun蛋白表达(P<0.01),逆转了SOX7对SW480细胞中ERK1/2、c-Jun蛋白表达的影响(P<0.01)。HUVEC中SOX7抑制了PD-L1、V-EGFR2、p-PI3K、HIF-1α的蛋白表达,Senkyunolide I上调了HUVEC的PD-L1、V-EGFR2、p-PI3K、HIF-1α的蛋白表达,并逆转了SOX7对HUVEC中上述相关蛋白表达的影响(P<0.01)。PD-1/PD-L1 Inhibitor 3抑制了PD-L1、V-EGFR2、p-PI3K、HIF-1α的蛋白表达,SOX7过表达在PD-1/PD-L1 Inhibitor 3的影响下并没有表现出抑制作用。CCK8实验结果显示SOX7过表达显著抑制了HUVEC的增殖能力,Senkyunolide I作用下的两组HUVEC增殖能力较SOX7 NC组与SOX7 mimic组明显上升,PD-1/PD-L1 Inhibitor 3作用下的两组HUVEC增殖能力较SOX7 NC组与SOX7 mimic组明显下降,以上均有明显统计学差异(P<0.01)。成管实验结果显示SOX7过表达抑制了HUVEC的血管生成,Senkyunolide I强烈加速了血管生成,而PD-1/PD-L1 Inhibitor 3血管生成则被显著抑制,以上均有明显统计学差异(P<0.01)。结论SOX7通过ERK1/2/PD-L1通路抑制结直肠肿瘤的增殖和血管生成,SOX7可能是晚期CRC患者临床治疗中潜在的抗血管生成靶点。

Inhibitory Effects of 5-Aza-2'-Deoxycytidine and Trichostatin A in Combination with p53-Expressing Adenovirus on Human Laryngocarcinoma Cells

Objective： To investigate the effects of 5-Aza-2＇-deoxycytidine （5-Aza-Cdr） and trichostatin A （TSA） combined with p53-expressing adenovirus （Ad-p53） on Hep-2 cell line in vivo and in vitro, in order to explore its possibility in biological treatment of laryngocarcinoma. Methods： Effects of 5-Aza-Cdr and TSA in combination with Ad-p53 on Hep-2 cell line in vivo were determined by Cell Counting Kit-8 （CCK-8） assay. The effect of drug combination was calculated by Jin＇s formula. Effects on the cell line in vitro were investigated by establishing the nude mice model. Results： 5-Aza-Cdr and TSA showed inhibitory effects on the proliferation of Hep-2 cells in dose- and time-dependent manner. Ad-p53 can inhibit the growth of Hep-2 cells in vivo and in vitro. However, the combination of epigenetic reagents （5-Aza-Cdr/TSA） and Ad-p53 was less effective than individual use of Ad-p53. 5-Aza-Cdr and Ad-p53 inhibited the growth of transplanted tumors and reduced the volume of tumors, and the tumor volume of Ad-p53 group was significantly smaller than that of the control group （P0.05）. Conclusion： Both epigenetic reagents （5-Aza-Cdr/TSA） and Ad-p53 can suppress cell proliferation on Hep-2 in vivo and in vitro and there may be some antagonistic mechanism between Ad-p53 and epigenetic reagents （5-Aza-Cdr/ TSA）.

<i>In Vitro</i>Anticancer Activity of Plant-Derived Cannabidiol on Prostate Cancer Cell Lines

Cannabinoids, the active components of Cannabis sativa Linnaeus, have received renewed interest in recent years due to their diverse pharmacologic activities such as cell growth inhibition, anti-inflammatory effects and tumor regression, but their use in chemotherapy is limited by their psychotropic activity. To date, cannabinoids have been successfully used in the treatment of nausea and vomiting, two common side effects that accompany chemotherapy in cancer patients. Most non-THC plant cannabinoids e.g. cannabidiol and cannabigerol, seem to be devoid of psychotropic properties. However, the precise pathways through which these molecules produce an antitumor effect have not yet been fully characterized. We therefore investigated the antitumor and anti-inflammatory activities of cannabidiol (CBD) in human prostate cancer cell lines LNCaP, DU145, PC3, and assessed whether there is any advantage in using cannabis extracts enriched in cannabidiol and low in THC. Results obtained in a panel of prostate cancer cell lines clearly indicate that cannabidiol is a potent inhibitor of cancer cell growth, with significantly lower potency in non-cancer cells. The mRNA expression level of cannabinoid receptors CB1 and CB2, vascular endothelial growth factor (VEGF), PSA (prostate specific antigen) are significantly higher in human prostate cell lines. Treatment with Cannabis extract containing high CBD down regulates CB1, CB2, VEGF, PSA, pro-inflammatory cytokines/chemokine IL-6/IL-8. Our overall findings support the concept that cannabidiol, which lacks psychotropic activity, may possess anti-inflammatory property and down regulates both cannabinoid receptors, PSA, VEGF, IL-6 and IL-8. High CBD cannabis extracts are cytotoxic to androgen responsive LNCaP cells and may effectively inhibit spheroid formation in cancer stem cells. This activity may contribute to its anticancer and chemosensitizing effect against prostate cancer. Cannabidiol and other non-habit forming cannabinoids could be used as novel therapeutic agents for the treatment of prostate cancer.

lncRNA-CASC2对甲状腺癌细胞增殖及侵袭转移的作用

目的探讨癌易感性候选基因2(CASC2)对甲状腺癌细胞(TPC-1)增殖及侵袭转移的影响。方法收集2020年1月-2022年12月于我院行手术治疗的83例甲状腺癌患者,取甲状腺癌组织及癌旁组织进行石蜡标本制作,并采用实时荧光定量聚合酶链反应(RT-PCR)对其癌组织和癌旁组织中CASC2mRNA和miR-155-5p RNA的表达水平进行检测。将TPC-1细胞随机分为质粒组、空载组及空白组,质粒组使用脂质体转染试剂转染CASC2a;而空载组转染空载质粒,空白组不做处理。采用CCK-8法检测细胞增殖情况,Transwell侵袭实验检测细胞迁移和侵袭情况。结果癌组织中lncRNA-CASC2的表达(1.23±0.08)明显低于癌旁组织(2.16±0.11);但miR-155-5p的表达(2.18±0.16)却明显高于癌旁组织(1.46±0.10)(P<0.05),3组细胞48 h的A450(分别为0.32±0.03、0.40±0.04、0.42±0.06)、72 h(分别为0.65±0.08、0.73±0.10、0.77±0.11)及96 h(分别为0.97±0.12、1.24±0.14、1.35±0.15)间的差异均有统计学意义(P<0.05),且随着时间的增加,3组细胞的A450值均有所增大。比较3组细胞迁移和侵袭能力发现,质粒组细胞的迁移数(54.63±8.95)和侵袭数(33.58±6.63)均明显低于空载组(分别为89.37±10.04、72.37±9.72)和空白组细胞(分别为93.21±10.22、75.82±9.62)(P<0.05);而空载组和空白组细胞的迁移数和侵袭数差异无统计学意义(P>0.05)。结论LncRNA-CASC2在甲状腺癌组织中呈现低表达,而miR-150-5p在癌组织中呈高表达,两种因子均为参与甲状腺癌的发生发展的关键;且lncRNA-CASC2在细胞水平上可抑制TPC-1细胞的增殖及迁移能力,但其抑癌作用的关键点及调控机制等需进一步探索。

藻蓝蛋白诱导喉癌HEP-2细胞凋亡的实验研究

目的:探讨藻蓝蛋白对人喉癌HEP-2细胞凋亡的影响,并初步探讨其机制。方法:不同浓度藻蓝蛋白处理HEP-2细胞,分别以MTT、倒置显微镜、扫描电镜、透射电镜、流式细胞术检测藻蓝蛋白对HEP-2细胞活力及凋亡的影响;DCFH-DA标记的流式细胞术检测细胞内的活性氧水平;分光光度法检测细胞内caspase-3、-8、-9的活性;RT-PCR、Western blot检测细胞凋亡相关基因的表达。结果:MTT结果显示藻蓝蛋白能够抑制喉癌HEP-2的细胞活力,且呈时间和剂量依赖性;倒置显微镜、电镜、流式细胞术的一系列定性化和定量化实验证实藻蓝蛋白可显著诱导HEP-2细胞的凋亡;藻蓝蛋白处理后细胞内ROS水平升高,caspase-3、-8、-9被激活;RT-PCR结果表明,藻蓝蛋白作用后Bax、Fas、P53、caspase-3和caspase-9表达显著上调(P<0.05),Bcl-2表达显著下调(P<0.05);Western blot结果和RT-PCR结果一致。结论:藻蓝蛋白能够诱导HEP-2细胞的凋亡,其机制可能与细胞内ROS水平升高,上调Bax、Fas和P53 mRNA,下调Bcl-2 mRNA的表达,从而促进凋亡信号的转导最终导致细胞凋亡有关。

抗肿瘤药物与TRAIL联用对喉癌HEP-2细胞株增殖、凋亡的影响

目的探讨化疗药物顺铂(DDP)、5氟尿嘧啶(5-Fu)单独及与TRAIL联合对HEP-2细胞株增殖、凋亡的影响。方法MTT法检测其增殖抑制作用,FCM法检测细胞凋亡率。结果TRAIL与5-Fu、DDP联合作用于HEP-2细胞株时,其抑制率、凋亡率高于单独作用时的抑制率和凋亡率。结论TRAIL与5-Fu、DDP联合作用有协同抑制HEP-2细胞株增殖、诱导HEP-2细胞株凋亡的作用。

姜黄素对喉癌Hep-2细胞增殖及Bcl-2、Bax基因表达的影响

目的探索姜黄素对喉癌细胞增殖的作用以及对细胞Bcl-2和Bax基因表达的影响。方法 Hep-2细胞暴露于含姜黄素(3-25μM)的培养基中,分别培养24h及48h,用MTT法检测对细胞增殖的影响;用RT-PCR法检测Bcl-2和Bax的mRNA表达水平。结果 MTT显示,姜黄素使Hep-2细胞增殖明显降低,并呈时间-剂量依赖性;RT-PCR结果显示,姜黄素使Bcl-2的mRNA表达水平降低,而使Bax的mRNA表达水平升高,并呈剂量和时间依赖性。结论姜黄素对人喉癌Hep-2细胞增殖具有显著的抑制作用。其作用机制可能与其下调Bcl-2基因表达水平及上调Bax基因表达水平,从而诱导细胞凋亡有关。

转移相关基因2对喉癌细胞系Hep-2的增殖、迁移和侵袭的影响

目的:探讨转移相关基因2(MTA2)对喉癌细胞系Hep-2的增殖、迁移和侵袭的影响。方法:通过针对MTA2基因的小干扰RNA(siRNA-MTA2)对MTA2基因表达进行下调,采用RT-PCR和Transwell检测转染,作为实验组,对照组转染阴性对照(sicontrol),通过MTT、细胞划痕实验和Transwell法分别检测MTA2对Hep-2的增殖、迁移和侵袭的影响。结果:实验组MTA2mRNA和蛋白表达水平明显低于对照组(P<0.05),实验组培养7d和9d时细胞增殖能力明显低于对照组(P<0.05),实验组细胞迁移能力和细胞侵袭能力明显低于对照组(P<0.05)。结论:MTA2与喉癌细胞系Hep-2细胞增殖、迁移和侵袭密切相关,有望成为治疗喉癌的靶点。

紫草素对人喉癌Hep-2细胞生长的作用研究

目的:研究紫草素对人喉癌Hep-2细胞生长的作用。方法:以不同浓度的紫草素作用于人喉癌Hep-2细胞,MTT法检测紫草素对人喉癌Hep-2细胞生长的抑制率,荧光显微镜观察人喉癌Hep-2细胞凋亡情况,流式细胞仪分析细胞周期分布及凋亡率变化,荧光定量PCR法测量人喉癌Hep-2细胞增殖诱导配体(APRIL)的表达量。结果:紫草素对人喉癌Hep-2细胞的增殖有明显抑制作用,并呈明显的量效关系和时间依赖性。紫草素主要阻滞细胞G1期向S期的发展。紫草素作用人喉癌Hep-2细胞后其APRIL mRNA表达量随时间的延长和浓度的增加而升高,48 h后各紫草素浓度组APRIL mRNA表达与空白组比较差异有统计学意义(P<0.05)。结论:紫草素可以抑制喉癌Hep-2细胞的增殖,未凋亡的人喉癌Hep-2细胞因APRIL表达升高而有增殖能力增强的潜在趋势。

尼美舒利对人喉鳞癌Hep-2细胞祼鼠移植瘤CD44和MMP-7表达的影响

目的探讨尼美舒利对喉鳞状细胞癌裸鼠皮下移植模型的抑瘤作用及机制。方法建立人喉鳞癌Hep-2细胞株裸鼠移植瘤模型,应用尼美舒利处理裸鼠,观察肿瘤生长情况并绘制生长曲线,免疫组织化学技术检测移植瘤组织中COX-2、CD44和MMP-7蛋白表达,RT-PCR技术检测移植瘤组织中COX-2、CD44和MMP-7 mRNA表达情况。结果与对照组相比,治疗组肿瘤体积增长较对照组缓慢,体积抑瘤率为63.36%,重量抑瘤率达51.81%,肿瘤体积和重量均明显低于对照组(P均<0.05)。实验组和对照组治疗前后裸鼠体重增长值差异无统计学意义(P>0.05)。实验组COX-2、CD44和MMP-7蛋白及mRNA表达明显低于对照组,差异有统计学意义(P均<0.05)。结论尼美舒利可有效抑制人喉鳞癌细胞系Hep-2裸鼠移植瘤的生长,其机制可能与抑制COX-2、CD44及MMP-7表达有关。

两种藻胆蛋白对人喉癌Hep-2细胞的光动力杀伤效果

从条斑紫菜中提取高纯度R-藻红蛋白(R-PE)和R-藻蓝蛋白(C-PC),采用MTT法测定主要研究了不同浓度(10、25、50和100μg/ml)R-PE和C-PC分别介导的光动力效应对人喉癌Hep-2细胞的生存率的影响。实验结果显示,两种藻胆蛋白的光动力作用对Hep-2细胞具有杀伤作用。在浓度为100μg/ml,照射剂量为50J/cm2的条件下,藻蓝蛋白对应的细胞存活率为64%,藻红蛋白对应的仅为57%;单用碘钨灯处理,Hep-2细胞的存活率达到86.9%;而单独使用这两种藻胆蛋白处理Hep-2细胞,培养24h后,低浓度藻胆蛋白(10、25μg/ml)对细胞的抑制效果不明显,高浓度对细胞生长具有一定的抑制效果,抑制率为68%。实验证明条斑紫菜R-藻红蛋白和C-藻蓝蛋白具有可开发人喉癌治疗光敏剂应用前景。