Prognostic and therapeutic impact of the chromosome 20q13.2 ZNF217 locus amplification in ovarian clear cell carcinoma

BACKGROUND:

The goal of this study was to examine the clinical significance of ZNF217 amplification and assess whether ZNF217 could be a potential therapeutic target in ovarian clear cell carcinoma (OCCC).

METHODS:

ZNF217 expression and amplification in OCCC was assessed by immunohistochemistry, fluorescence in situ hybridization, and clinical data collected via a retrospective chart review. ZNF217 gene knockdown using silencing RNA (siRNA) was used to assess ZNF217 functions in OCCC cell lines.

RESULTS:

Gene amplification was identified in 12 of 60 (20.0%) OCCCs. ZNF217 copy number correlated significantly with ZNF217 protein expression (r = 0.341; P<.01). ZNF217 amplification correlated significantly with shorter progression‐free (P = .0042) and overall (P = .0199) survival. There were nonsignificant trends between high ZNF217 protein expression and poor progression‐free (P = .2594) and overall (P = .2199) survival. Multivariate analysis revealed ZNF217 gene amplification to be an independent prognostic factor for progression‐free and overall survival after standard platinum agent‐based chemotherapy (P = .0339 and P = .031, respectively). Profound growth inhibition and apoptosis were observed in ZNF217 siRNA‐treated cancer cells with gene amplification compared with cancer cells with ZNF217 moderate expression without ZNF217 gene amplification or with low ZNF217 expression.

CONCLUSION:

These findings indicate that ZNF217 overexpression is critical to growth and survival of OCCCs with ZNF217 gene amplification. Furthermore, they suggest that ZNF217 siRNA‐induced phenotypes depend on amplification status of OCCCs. Therefore, ZNF217‐targeted therapy may benefit OCCC patients with ZNF217 amplification. Cancer 2011. © 2011 American Cancer Society.     

锌指蛋白(ZNF)185在小鼠不同发育阶段睾丸中的表达

目的:研究锌指蛋白(ZNF)185在小鼠不同发育阶段睾丸中的表达。方法:从小鼠脑、肝、卵巢和不同发育阶段睾丸组织中提取总RNA,采用半定量RT-PCR法检测ZNF185的表达;制备小鼠不同发育阶段睾丸冰冻切片,应用免疫细胞化学分析法检测ZNF185蛋白的定位。结果:①ZNF185在睾丸中的表达显著高于脑、肝和卵巢组织。②ZNF185在小鼠性成熟前组睾丸中的表达显著低于性成熟期和老年期,而性成熟期和老年期之间差异不显著。③在性成熟前,ZNF185主要定位于睾丸间质细胞和类肌细胞;在性成熟期和老年期小鼠中,ZNF185主要定位于睾丸间质细胞、类肌细胞和精子。结论:ZNF185在小鼠性成熟后睾丸中的表达升高,定位更广泛。     

锌指蛋白217 在非小细胞肺癌组织中的表达及其临床意义

目的 检测锌指蛋白217（ZNF217）在非小细胞细胞癌中的表达,探讨其与非小细胞肺癌患者 临床病理特征的关系,并分析其与非小细胞肺癌患者生存及预后的关系。方法 利用实时荧光定量聚合酶链 反应（qRT-PCR）检测非小细胞肺癌组织及对应癌旁组织中ZNF217 的表达水平,并利用统计学软件分析 ZNF217 的临床相关性。结果 ZNF217 在非小细胞肺癌组织中的表达水平高于癌旁组织。非小细胞肺癌组 织中ZNF217 的表达水平与非小细胞肺癌患者TNM 分期及淋巴结转移情况呈正相关,与其他临床病理特征 无相关。Kaplan-Meier 生存曲线结果发现ZNF217 表达与患者术后5 年总体生存率及无进展生存率均呈负相 关。Cox 风险比例模型结果发现ZNF217 可作为判断非小细胞肺癌预后独立的预测指标。结论 ZNF217 在 非小细胞肺癌组织中表达升高,并可作为判断非小细胞肺癌患者生存及预后的指标。     

Multi-colour FISH in oesophageal adenocarcinoma—predictors of prognosis independent of stage and grade

Background:

Oesophageal adenocarcinoma or Barrett''s adenocarcinoma (EAC) is increasing in incidence and stratification of prognosis might improve disease management. Multi-colour Fluorescence in situ hybridisation (FISH) investigating ERBB2, MYC, CDKN2A and ZNF217 has recently shown promising results for the diagnosis of dysplasia and cancer using cytological samples.

Methods:

To identify markers of prognosis we targeted four selected gene loci using multi-colour FISH applied to a tissue microarray containing 130 EAC samples. Prognostic predictors (P1, P2, P3) based on genomic copy numbers of the four loci were statistically assessed to stratify patients according to overall survival in combination with clinical data.

Results:

The best stratification into favourable and unfavourable prognoses was shown by P1, percentage of cells with less than two ZNF217 signals; P2, percentage of cells with fewer ERBB2- than ZNF217 signals; and P3, overall ratio of ERBB2-/ZNF217 signals. Median survival times for P1 were 32 vs 73 months, 28 vs 73 months for P2; and 27 vs 65 months for P3. Regarding each tumour grade P2 subdivided patients into distinct prognostic groups independently within each grade, with different median survival times of at least 35 months.

Conclusions:

Cell signal number of the ERBB2 and ZNF217 loci showed independence from tumour stage and differentiation grade. The prognostic value of multi-colour FISH-assays is applicable to EAC and is superior to single markers.     

ZNF804A基因外显子4区域单核苷酸多态性在中国汉族精神分裂症患者核心家系中的传递不平衡检验

目的 研究ZNF804A基因外显子4区域中的单核苷酸多态性位点(SNPs)和精神分裂症的相关性.方法 在69个中国汉族精神分裂症患者的核心家系中,采用MassARRAY等位基因分型技术对位于ZNF804A基因外显子4的7个SNPs以及2个侧翼的遗传标记进行基因分型和传递不平衡检验(TDT).结果 (1)存在4个罕见(少数等位基因频率＜1％)的SNPs(rs79776875、rs78816540、rs79082132和rs62198467),因其不符合分析要求,予以排除.(2)对其余5个SNPs( rs4667000、rs61739290、rs61739288、rs1366842、rs3731834)的分析表明,遗传标记rs3731834的传递不平衡结果具有统计学意义(P＜0.05).(3)在连锁不平衡分析中,对5个SNPs构建的单倍型分析显示其传递差异具有统计学意义(整体P＜0.05).结论 ZNF804A基因外显子4区域的SNPs与中国汉族人群精神分裂症的遗传易感性相关.     

ZNF217基因在卵巢癌中的表达及意义

目的 检测ZNF217基因在卵巢囊腺癌、卵巢囊腺瘤及正常卵巢组织中的表达,初步探讨其与卵巢癌发生发展的关系.方法 用免疫组织化学法及实时RT-PCR方法检测卵巢囊腺癌、卵巢囊腺瘤及正常卵巢组织中ZNF217基因在蛋白及转录水平的表达情况.结果 ZNF217基因在卵巢囊腺癌中的蛋白表达高于卵巢囊腺瘤及正常卵巢组织中的(P<0.05),而且ZNF217基因的蛋白高表达与卵巢癌的发生显著相关(r=0.627),卵巢囊腺瘤组织与正常的卵巢组织相比差异则无显著性(P0.05),在mRNA水平的检测与上述结果一致.结论 ZNF217基因的表达与卵巢癌的发生高度相关,且与卵巢癌的临床分期相关.ZNF217基因可能是导致卵巢癌发生发展的重要候选基因之一.