Wilm′s tumor gene1肽疫苗Galinpepimut-S在肿瘤免疫治疗中的应用

目的为Wilm′s tumor gene1(WT1)肽疫苗Galinpepimut-S(GPS)用于肿瘤免疫治疗的后续研究提供参考。方法采用计算机检索中国知网、PubMed等数据库自建库起至2022年12月的肿瘤免疫治疗相关文献,总结GPS在肿瘤免疫治疗中的应用现状。结果GPS能激发自身免疫系统,对WT1抗原产生强烈免疫反应而发挥抗肿瘤作用,在卵巢癌、恶性胸膜间皮瘤、急性髓系白血病、多发性骨髓瘤的治疗中均显示出较好的疗效。结论以GPS为代表的肿瘤疫苗是未来肿瘤治疗的重要方向,需进一步进行临床研究,以获取更多数据。

Juvenile myelo-monocytic leukemia (JMML): No effect of granulocyte monocyte-colony stimulating factor (GM-CSF) on Wilms Tumor gene (<i>WT</i>1) by nested Polymerase Chain Reaction (nPCR) and flow cytometry

This study was to determine whether GM-CSF induced WT1 gene expression and to establish an association with markers of proliferation CD71+CD34+ using nPCR and flow cytometry respectively, in samples obtained from 5 newly diagnosed JMML patients. Overtime (day 0 to day 14) there was an insignificant difference in WT1 gene expression and CD71+CD34+ in JMML samples when compared to peripheral blood of normal volunteers (n = 3). Our study suggests that there is a correlation between WT1 gene expression and cellular proliferation and that GMCSF in vitro does not create a significant difference in JMML samples.

Identification of a constitutional mutation in the WT1 gene in Taiwan Residents patients with Wilms tumor

The overall frequency of WT1 gene alterations in Wilms tumor is still unclear in Taiwan. Here we conducted molecular genetic analysis of the WT1 gene in Taiwan Residents patients with Wilms tumor. Polymerase chain reaction and direct sequencing were performed on DNA samples from blood and paraffin-embedded tumor specimens. A constitutional mutation in the WT1 gene was found in one DNA sample from peripheral blood lymphocytes. The remaining DNA samples from peripheral blood lymphocytes and paraffin-embedded tumor specimens were tested negative for both constitutional mutations and somatic mutations. Thus, mutations at other Wilms tumor loci may play an important role in Wilms tumor development.

The role of tazarotene-induced gene 1 in carcinogenesis:is it a tumor suppressor gene or an oncogene?

Tazarotene-induced gene 1(TIG1)is induced by a derivative of vitamin A and is known to regulate many important biological processes and control the development of cancer.TIG1 is widely expressed in various tissues;yet in many cancer tissues,it is not expressed because of the methylation of its promoter.Additionally,the expression of TIG1 in cancer cells inhibits their growth and invasion,suggesting that TIG1 acts as a tumor suppressor gene.However,in some cancers,poor prognosis is associated with TIG1 expression,indicating its protumor growth characteristics,especially in promoting the invasion of inflammatory breast cancer cells.This review comprehensively summarizes the roles of the TIG1 gene in cancer development and details the mechanisms through which TIG1 regulates cancer development,with the aim of understanding its various roles in cancer development.

宫内发育迟缓大鼠肾脏Wilms瘤1基因DNA甲基化与蛋白尿关系

目的观察宫内环境对肾脏Wilms瘤1(WT1)基因甲基化状态的影响及其与肾脏功能的关系,探讨宫内环境引发肾脏疾病的可能分子机制。方法采用孕期全程低蛋白饮食法建立宫内发育迟缓(IUGR)大鼠模型,至自然分娩。对照组以孕期常规饲料饲养至自然分娩。12周龄时,比色法测定24h尿蛋白定量,光镜下计数肾小球数目,实时PCR方法检测肾脏WT1基因mRNA水平及甲基转移酶DNMT1、DNMT3a和DNMT3bmRNA水平,MassARRAY定量分析检测WT1基因启动子区DNA甲基化状态。结果①IUGR组新生鼠出生体重显著低于对照组(P<0.0001),直至12周龄时体重仍低于对照组(P=0.043)。②与对照组相比,12周龄时IUGR组大鼠24h尿蛋白定量显著升高(P=0.016);血清胱抑素C水平显著升高(P=0.036),肾小球数目显著下降(P=0.001)。③与对照组相比,12周龄时IUGR组大鼠肾组织WT1基因mRNA的表达显著增高(P=0.047),WT1基因启动子区甲基化水平显著降低(P=0.029),并且其M1段甲基化水平与WT1基因mRNA的表达呈负相关(r=-0.939,P=0.0001),DNMT1和DNMT3bmRNA表达水平也显著下降(P值分别为0.003和0.010)。结论不良的宫内环境可以影响大鼠肾脏WT1基因的甲基化状态,继而导致其异常表达,可能参与了IUGR大鼠成年期蛋白尿的发生。

急性白血病患者Wilms肿瘤基因(WT1)表达及其临床意义

目的检测急性白血病患者WT1mRNA转录水平,探讨WT1基因与白血病病程的关系。方法应用荧光定量PCR(FQ-PCR)方法对57例白血病病人和10例正常健康人的外周血或骨髓标本进行WT1基因的检测。结果45例初发急性白血病(AL)中35例WT1mRNA阳性(阳性率77.8%),其中27例初发急性髓细胞白血病(AML)中24例阳性(88.9%),18例初发急性淋巴细胞白血病(ALL)中11例阳性(61.1%)。10例正常人没有检测到WT1mRNA。结论急性白血病WT1mRNA呈高表达,在缺乏特异性克隆标志白血病中监测WT1mRNA是有价值的。

Wilms瘤p16基因的表达

目的 探讨p16基因表达产物 p16在Wilms瘤中的表达及其与病理分型和临床分期间的关系。方法 应用免疫组织化学S -P方法常规进行染色。结果 5 2例Wilms瘤中 ,p16表达阳性在预后好的病理分型和预后差的病理分型分别为 37.2 %、0 % ,两组差异显著 (P <0 .0 5 )。p16阳性表达在Ⅰ、Ⅱ、Ⅲ、Ⅳ期分别为 91%、6 0 %、40 %、6 .6 7%。 4期间比较 ,差异显著 (P <0 .0 5 )。结论 p16蛋白表达与病理分型及临床分期有关 。

p16基因表达与Wilms瘤病理分型和临床分期关系的研究

目的与方法 :为探Wilms瘤中 p16基因表达与肿瘤病理分型和临床分期之间的关系 ,应用免疫组织化学SP方法 ,对 5 2例Wilms瘤及 7例肿瘤周围正常肾组织 (对照 )手术标本中 p16基因的表达情况进行检测。结果 :5 2例wilms瘤中有 16例 p16基因表达阳性 ,阳性率为 30 .8% ,其中预后良好型 p16基因表达阳性率为 37.2 % (16 /4 3) ,预后差者为 0 % (0 /9) ,均明显低于正常对照 10 0 % (7/7) ,差异具有显著的统计学意义 (P <0 .0 5 )。在Ⅰ、Ⅱ、Ⅲ、Ⅳ临床期中 ,p16表达阳性率以Ⅰ期最高 ,逐步递减 ,分别为 47.6 % (10 /2 1)、37.5 % (3/8)、2 8.6 % (2 /7)、6 .3% (1/16 )。结论 :Wilms瘤中 p16基因表达与肿瘤病理分型和临床分期存在联系 ,p16基因失活似是Wilms瘤发生发展中的晚期事件。

人Wilms瘤基因1重组腺病毒Ad5/F35的制备及感染树突状细胞后的鉴定

目的构建人Wilms瘤基因1(WT1)重组腺病毒载体Ad5/F35并鉴定。方法运用不同病毒滴度的Ad5-EGFP和Ad5/F35-EGFP感染黑素瘤患者外周血树突状细胞(DC),用荧光显微镜检测EGFP的表达,选择对DC感染率高的腺病毒;同源重组构建Ad5/F35-WT1腺病毒载体,用免疫细胞化学和流式细胞术(FCM)检测WT1的表达。结果在相同滴度下,腺病毒载体Ad5/F35的感染优于Ad5;成功构建了Ad5/F35-WT1重组腺病毒,免疫细胞化学染色和FCM证实该病毒能有效介导WT1在DC中的表达。结论 Ad5/F35-WT1重组腺病毒能将WT1基因成功导入DC并有效表达。

Inactivation of RASSF1A, the tumor suppressor gene at 3p21.3 in extrahepatic cholangiocarcinoma

AIM: To evaluate the genetic and epigenetic inactivation mechanism of the RASSF1A tumor suppressor gene at 3p21.3 in extrahepatic cholangiocarcinoma. METHODS: RT-PCR was used to investigate the transcriptional expressing and re-expression of RASSFIA. RASSFIA mutation was analyzed with SSCP and selective sequencing. PCR was performed to detect the loss of heterozygosity (LOH) at the region of chromosome 3p21.3. Genomic DNA were modificated bisulfite and the frequency of methylation of CpG islands in RASSFIA promoter were evaluated by methylation specific PCR (MS-PCR). RESULTS: In all 48 samples and one cell lines of extrahepatic cholangiocarcinoma, the RASSFIA mutation is rare (6.12%, 3/49), 33 samples (68.75%) and QBC-939 cell lines (X2= 14.270, P= 0.001<0.01) showed RASSFIA express inactivation with LOH at microsatellite loci D3S4604. Among these 33 samples and QBC-939, 28 of 33 (84.85%) tumor samples and 1 cell lines were methylated for majority of 16 CpGs, the average frequency is 73.42%. CONCLUSION: The data we present suggest that RASSFIA which we have been searching for at 3p21.3 may be one of the key tumor suppressor gene and play an important role in the pathogenesis of extrahepatic cholangiocarcinoma, and the promoter methylation and allelic loss are the major mechanism for inactivation of RASSFIA.

N-myc downstream regulated gene 1 inhibition of tumor progression in Caco2 cells

BACKGROUND Invasion and migration are the irreversible stages of colorectal cancer(CRC).The key is to find a sensitive,reliable molecular marker that can predict the migration of CRC at an early stage.N-myc downstream regulated gene 1(NDRG1)is a multifunctional gene that has been tentatively reported to have a strong relationship with tumor invasion and migration,however the current molecular role of NDRG1 in CRC remains unknown.AIM To explore the role of NDRG1 in the development of CRC.METHODS NDRG1 stably over-expressed Caco2 cell line was established by lentiviral infection and NDRG1 knock-out Caco2 cell line was established by CRISPR/Cas9.Furthermore,the mRNA and protein levels of NDRG1 in Caco2 cells after NDRG1 over-expression and knockout were detected by real-time polymerase chain reaction and western blot.The cell proliferation rate was measured by the cell counting kit-8 method;cell cycle and apoptosis were detected by flow cytometry;invasion and migration ability were detected by the 24-transwell method.RESULTS NDRG1 over-expression inhibited Caco2 proliferation and the cell cycle could be arrested at the G1/S phase when NDRG1 was over-expressed,while the number of cells in the G2 phase was significantly increased when NDRG1 was knocked out.This suggests that NDRG1 inhibited the proliferation of Caco2 cells by arresting the cell cycle in the G1/S phase.Our data also demonstrated that NDRG1 promotes early cell apoptosis.Invasion and migration of cells were extensively inhibited when NDRG1 was over-expressed.CONCLUSION NDRG1 inhibits tumor progression in Caco2 cells which may represent a potential novel therapeutic strategy for the treatment of CRC.

Effect of insulin-like growth factor-1 on pituitary tumor transforming gene in glioma C6 cells

Objective: To investigate the effect of insulin-like growth factor-1 (IGF-1) on pituitary tumor transforming gene (PTTG) in glioma C6 cells. Methods: Glioma C6 cells were divided into four groups: A group, treated without IGF-1; B group, treated with 0.1 ng/mL dose of IGF-1; C group, treated with 1 ng/mL dose of IGF-1; D group, treated with 10 ng/mL dose of IGF-1. PTTG mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR), western blotting was used to detect the expression of PTTG protein. Results: The expressions of PTTG mRNA were 1.370 ± 0.212, 2.198 ± 0.354, 3.452 ± 0.332, and 4.576 ± 0.387 respectively in the four groups, and there was a significantly difference between any two groups (P < 0.01). The protein expressions of PTTG in the four groups were 1.407 ± 0.334, 1.813 ± 0.465, 2.412 ± 0.576, and 3.128 ± 0.665 respectively, and there was a significantly difference between any two groups (P < 0.01). Conclusion: IGF-1 can up-regulate the expression of PTTG significantly in dosage-dependent manner.

Experimental Study on the Antitumor Effect of Mouse B7-1 Gene

Summary: Mouse B7 1 cDNA was cloned by RT PCR from BALB/C mouse splenic cells and inserted into pcDNA3 to construct an eukaryotic expression vector. This constructor was named pCD mB7 1, in which the B7 1 cDNA was identified to be consistent with the data from other researchers. pCD mB7 1 plasmid was transfected into B16(F0) cells, and effective expression of mB7 1 in these tumor cells could be detected till the 6th month by RT PCR and RNA hybridization. Specific cytotoxity assay of lymphocytes was conducted after culturing with tumor cells and the results demonstrated that B16 cells transfected with B7 1 gene were more effective than B16 wt and B16 neo in inducing specific cytotoxity of lymphocytes against B16 wt cells. It is suggested that expression of B7 1 gene in tumor cells could enhance the immunogenicity and induce the effective antitumor immunity.

Prokaryotic expression, purification of a novel candidate tumor suppressor gene FUS1 and characterization of its polyclonal antibodies

FUS1 is a novel candidate tumor suppressor gene identified in human chromosome 3p21.3. Its expression showed significantly reduction or even loss in lung cancer and other types of cancers. In order to further investigate the biological function of FUS1 protein, FUS1 cDNA from MRC-5 cells was amplified by RT-PCR and cloned into prokaryotic expression vector pQE-30. The recombinant expression plasmids were transformed into M15 strain and grown at 20℃ or 37℃. SDS–PAGE analysis revealed that the accumulation of the recombinant protein FUS1 (rFUS1) in inclusion body forms reached maxium amount when induced with 0.5 mM IPTG for 5 h at 37℃. The inclusion bodies were solubilized in 2M urea and purified by a 6 &#215;His tagged affinity column under denaturing condition. The purified rFUS1 was identified by electrospray ionization-mass spectrometry (ESI-MS) and tested for purity by HPLC chromatography. The purified rFUS1 proteins were then used to immunize rabbits to obtain anti-human FUS1 polyclonal antibodies, which were suitable to detect both the recombinant exogenous FUS1 and the endogenous FUS1 from tissues and cells by western blot and immunohistochemistry, Available purified rFUS1 proteins and self-prepared polyclonal antibodies against FUS1 may provide effective tools for further studies on biological function and application of FUS1.

Correlation of pituitary tumor transforming gene 1 with proliferation and invasion genes in prostate cancer

Objective:To study the change of pituitary tumor transforming gene 1 (PTTG1) expression in prostate cancer and its correlation with proliferation and invasion genes.Methods: Patients with prostate cancer who underwent radical operation in our hospital between March 2015 and January 2018 were selected as the malignant group of the research, and the prostate cancer lesions were collected;patients who underwent transurethral resection of the prostate due to benign prostatic hyperplasia in our hospital during the same period were selected as the benign group of the research, and the benign prostate lesions were collected. The mRNA expression levels of PTTG1, proliferation genes and invasion genes in the lesions were determined. Results:PTTG1, Survivin, Bcl-2, CyclinD1, GPRC6A, ZEB1, CatB, CatD and PAR-1 mRNA expression in prostate cancer lesions of malignant group were significantly higher than those of benign group whereas CDKN2, p21 and TFPI2 mRNA expression were significantly lower than those of benign group;Survivin, Bcl-2, CyclinD1, GPRC6A, ZEB1, CatB, CatD and PAR-1 mRNA expression in prostate cancer lesions with high PTTG1 were significantly higher than those in prostate cancer lesions with low PTTG1 whereas CDKN2, p21 and TFPI2 mRNA expression were significantly lower than those in prostate cancer lesions with low PTTG1.Conclusion:The PTTG1 gene is highly expressed in prostate cancer lesions and it is closely related to the changes of proliferation and invasion gene expression.

Study of cellular immunity response of mB7-1 gene transfected mouse ovarian cancer cell line and its tumorigenecities in vivo

Objective:To investigate the cellular immunity response in vitro and the tumorigenecities in vivo of mB7 1 gene transfected murine ovarian cancer cell line.Methods:mB7 1 gene was transfected into the NuTu 19 cell line by retrovirus vector, and the expression of mB7 1 gene was confirmed by flow cytometry(FCM).NuTu 19/neo and NuTu 19/mB7 1 cells were injected subcutaneously into syngeneic Fischer 344 rats respectively,and their tumorigenecities were recorded.Proliferation indices of lymphocyte were assayed after syngenieic mixed tumor lymphocyte cultures(MTLCs).The lysis activity of CTL toward tumor cells was determined using methyl thiazolyl tetrazolium(MTT) assay.Results:Successful transfection of mB7 1 gene into NuTu 19 cell line was comfirmed with FCM.In vitro study showed that there was no obvious changes in cell growth of gene transfected cell line,compared with the cell line NuTu 19.NuTu 19/mB7 1 cells could induce more effective proliferation of effector lymphocytes(P<0.05). The lysis activity of CTL activated by NuTu 19/mB7 1 was stronger than that of NuTu 19/neo (P<0.01).Tumor sizes were smaller in the NuTu 19/mB7 1 receptance syngeneic Fischer 344 rats compared with those in the control group.Conclusion:mB7 1 genetically modified ovarian cancer cells could induce the cellular immunity response in vitro and the tumorigenecitiy of NuTu 19 cells was decreased after inoculation with the experimental vaccine.

Wilms瘤基因1、B7家族成员H3及自然杀伤细胞表面受体在多发性骨髓瘤和淋巴瘤中的表达及临床意义

目的探讨Wilms瘤基因1(WT1)、B7家族成员H3(B7H3)及自然杀伤(NK)细胞表面受体在多发性骨髓瘤和淋巴瘤中的表达及临床意义。方法选取56例多发性骨髓瘤患者和50例淋巴瘤患者,分别作为骨髓瘤组和淋巴瘤组,采用流式细胞仪检测两组患者NK细胞占有核细胞比例,采用荧光定量聚合酶链反应(PCR)检测两组患者WT1、B7H3 mRNA相对表达量以及NK细胞表面受体NKG2D、CD69、程序性死亡受体1(PD-1)mRNA的相对表达量。随访1年,比较不同预后情况多发性骨髓瘤和淋巴瘤患者WT1、B7H3 mRNA相对表达量及NK细胞占有核细胞比例。绘制受试者工作特征(ROC)曲线,计算曲线下面积(AUC),评估各指标对多发性骨髓瘤患者和淋巴瘤患者预后的预测价值。结果骨髓瘤组患者B7H3 mRNA相对表达量低于淋巴瘤组,PD-1、NKG2D mRNA相对表达量及NK细胞占有核细胞比例均高于淋巴瘤组,差异均有统计学意义(P﹤0.05)。随访结束,56例多发性骨髓瘤患者中,预后不良15例,预后良好41例,预后良好的多发性骨髓瘤患者B7H3 mRNA相对表达量明显低于预后不良患者,差异有统计学意义(P﹤0.01)。B7H3预测多发性骨髓瘤患者预后的AUC为0.748(95%CI:0.605~0.891),cut-off值为3.29,此时的灵敏度为0.867,特异度为0.659。随访结束,淋巴瘤组患者中,预后不良19例,预后良好31例,预后良好淋巴瘤患者B7H3 mRNA相对表达量低于预后不良患者,NK细胞占有核细胞比例高于预后不良患者,差异均有统计学意义(P﹤0.05)。B7H3、NK细胞占有核细胞比例联合检测预测淋巴瘤患者预后的AUC为0.852(95%CI:0.731~0.973),灵敏度为0.871,特异度为0.737。结论B7H3及NK细胞受体在多发性骨髓瘤和淋巴瘤患者中的表达水平存在差异,但WT1水平的差异不明显,B7H3及NK细胞占有核细胞比例对多发性骨髓瘤及淋巴瘤患者的预后有一定的预测意义。

Wilms瘤基因在白血病、多发性骨髓瘤和淋巴瘤中的表达研究

目的探讨Wilms瘤基因(WT1)在白血病、淋巴瘤及多发性骨髓瘤患者中的表达差异及其临床意义。方法选取77例白血病、29例多发性骨髓瘤和30例淋巴瘤患者进行研究,采用荧光定量PCR技术检测三组骨髓中WT1基因的表达水平并进行比较分析。结果白血病患者的WT1基因水平(0.105±0.019)显著的高于多发性骨髓瘤患者(0.027±0.008)和淋巴瘤患者(0.026±0.010)且差异有统计学意义(P<0.05),多发性骨髓瘤患者和淋巴瘤患者的WT1基因表达水平差异无统计学意义(P>0.05)。治疗后,白血病患者的WT1基因水平(0.062±0.016)显著的低于初诊的白血病患者(0.157±0.012)且差异有统计学意义(P<0.05),治疗后的多发性骨髓瘤患者和淋巴瘤患者与初诊的多发性骨髓瘤患者和淋巴瘤患者的WT1基因表达水平差异无统计学意义(P>0.05)。结论 WT1在白血病患者表达水平较淋巴瘤、多发性骨髓瘤患者呈显著的升高,同时治疗后白血病患者的WT1基因表达水平较初诊白血病患者呈显著降低。

Wilms肿瘤基因反义寡苷酸对白血病细胞凋亡的影响

了解Wilms肿瘤基因 (WT1)反义寡核苷酸 (ASO)对白血病细胞凋亡的作用。方法 :应用WT1ASO以及足叶乙甙 (VP 16 )作用K5 6 2、HL 6 0细胞系 ,然后应用流式细胞仪测定DNA含量以确定白血病细胞的凋亡数。结果 :K5 6 2细胞系经WT1ASO作用 2 4h和 6 0h后细胞凋亡数分别为 14.6 %和 2 6 .8% ;而WT1有义寡核苷酸 (SO)组分别为 3.1% (2 4h)和 3 9% (6 0h) ;加入少量VP 16后凋亡数达到 37 2 % (2 4h)和 6 6 .6 % (6 0h)。HL 6 0细胞经WT1ASO作用 2 4h及 6 0h后细胞凋亡数无明显增高 ,但作用 6 0h后与VP 16联合作用 ,细胞凋亡可达 34.7% ,大于单用VP 16 (13 .7% )及VP 16 +SO (15 .4% )诱导的细胞凋亡数。结论 :WT1ASO可以导致K5 6 2细胞凋亡并可提高白血病细胞对VP 16的敏感性。WT1基因与白血病细胞的凋亡有关 ,其在不同细胞中所发挥的作用不同。

ERCC1、K-ras、TP-73在替雷利珠单抗联合TP化疗方案治疗非小细胞肺癌中的评估价值

目的研究探讨核苷酸切除修复交叉互补基因1(ERCC1)、Kirsten-Rous肉瘤病毒蛋白(K-ras)、肿瘤蛋白P73(TP73)在替雷利珠单抗结合紫杉醇+顺铂(TP)化疗方案治疗NSCLC中的评估价值。方法选取2020年1月至2021年12月本院收治的126例NSCLC肺癌患者为研究对象,按随机抽签法分为对照组、观察组,各63例。对照组以TP化疗方案治疗,观察组增加替雷利珠单抗治疗。评估组间临床疗效、肿瘤标记蛋白、免疫指标、生存周期、不良反应。结果观察组患者的客观缓解率为69.84%(44/63)高于对照组患者为52.38%(33/63),观察组疾病控制率为82.54%(52/63),高于对照组患者为66.67%(42/63)(P<0.05)。化疗1周期、化疗3周期、化疗6周期时,观察组ERCC1、K-ras、TP-73水平均低于对照组(P<0.05)。治疗后观察组免疫功能补体C3、补体C4、CD40细胞低于对照组,NK细胞高于对照组(P<0.05)。观察组患者的TTP、PFS、总生存期均高于对照组(P<0.05)。观察组不良反应发生率为19.05%(12/63),对照组为12.70%(8/63),组间比较差异无统计学意义(P>0.05)。结论替雷利珠单抗联合TP化疗方案治疗肺癌有良好的治疗效果,能够改善患者免疫功能,延长患者生存周期,治疗安全性较好,且ERCC1、K-ras、TP-73水平变化可反映替雷利珠单抗联合TP化疗方案在肺癌治疗中的效果,在综合疗效评估中有较高的应用价值。