紫杉醇联合表阿霉素新辅助化疗治疗三阴性乳腺癌的临床疗效评价及其对Ki-67、p53、P-gp和GST-π的影响

目的:研究紫杉醇联合表阿霉素新辅助化疗治疗三阴性乳腺癌的临床疗效及对Ki-67、p53、P-糖蛋白(P-gp)和谷胱甘肽转移酶(GST-π)的影响。方法:选取2010年6月~2012年6月我院收治的84例三阴乳腺癌患者,根据患者入院顺序分为观察组和对照组,42例每组。对照组使用表阿霉素联合环磷酰胺完成化疗,观察组使用紫杉醇联合表阿霉素完成新辅助化疗。比较两组患者临床疗效,治疗前后Ki-67、p53、P-gp和GST-π的表达情况。结果:治疗后,观察组总的缓解率显著高于对照组[76.19%(32/42)比45.24%(19/42)](P0.05)。化疗前,两组患者Ki-67、p53、P-gp和GST-π阳性表达率比较无统计学意义(P0.05);化疗后,观察组患者的Ki-67、p53、P-gp和GST-π阳性表达率较化疗前显著降低(P0.05),但对照组的Ki-67、p53、P-gp和GST-π阳性表达率和化疗前相比无明显变化(P0.05),观察组的Ki-67、p53、P-gp和GST-π阳性表达率显著低于对照组(P0.05)。观察组和对照组的不良反应率比较差异无统计学意义(P0.05)。结论:紫杉醇联合表阿霉素新辅助化疗治疗三阴性乳腺癌的疗效确切,其能有效降低Ki-67、p53、P-gp和GST-π的表达。     

三阴性乳腺癌中Ki-67 的表达及其临床病理意义

目的:探讨三阴性乳腺癌中Ki-67的表达及其临床病理意义。方法:回顾性分析2010年11月1日至2015年12月31日辽宁省肿瘤医院收治的110例行乳腺癌根治术的三阴性乳腺癌患者的临床病理资料,检测其乳腺癌组织中Ki-67的表达,并分析其与患者年龄、绝经情况、组织学分型、临床分期、淋巴结转移、肿瘤大小等临床病理资料的关系。进一步采用Kaplan-Meier生存分析法绘制生存曲线,比较高表达Ki-67和低表达Ki-67患者的3年、5年生存率。结果:Ki-67在三阴性乳腺癌患者50岁以下和50岁以上相比较,差异具有统计学意义(P0.05);Ki-67在三阴性乳腺癌患者绝经情况、组织学分型、临床分期、淋巴结转移、肿瘤大小的表达相比较,差异不具有统计学意义(P0.05);高表达Ki-67组3年生存率为79.49%,5年生存率为30.77%;低Ki-67组的3年生存率为85.92%,5年生存率为46.48%;两组3年生存率相比较差异不具有统计学意义(P0.05);两组5年生存率相比较差异具有统计学意义(P0.05);两组总生存时间相比较,差异具有统计学意义(P0.05)。结论:三阴性乳腺癌中Ki-67呈高表达,可作为乳腺癌预后不良的危险因素。     

P57,P53,bcl-2,ki-67联合应用在葡萄胎诊断中的意义

目的:研究p57,P53,bcl-2,ki-67蛋白表达在完全性葡萄胎(CM)、部分性葡萄胎(PM)及水肿流产胎(HA)的诊断及鉴别诊断意义.方法:对21例完全性葡萄胎,28例部分性葡萄胎,18例水肿流产胎的标本进行4种抗体免疫组化分析,同时选取10例正常胎盘组织作为对照.结果:在CM中,p57表达不明显,而P53,bcl-2,Ki-67表达增强;在PM,HA及对照组中p57呈现高表达,P53,bcl-2,Ki-67则表达较弱.这四种抗体的表达在完全性葡萄胎与部分性葡萄胎、水肿流产胎及对照组之间的差异具有显著性(P＜0.01),而部分性葡萄胎与水肿流产胎、水肿流产胎与对照组之间差异不显著(P＞0.05).结论:p57和Ki-67表达对CM,PM和HA的鉴别诊断有重要作用,而P53,bcl-2表达对判断预后及预测恶变风险有意义.     

宫颈低级别鳞状上皮内病变组织CK8、P53及Ki-67的表达及其临床意义

摘要 目的：探讨宫颈低级别鳞状上皮内病变（LSIL）组织中细胞角蛋白 8（CK8）、P53及Ki-67的表达,分析其与病情进展的关系。方法：回顾性分析2020年1月至2021年12月我院收治的120例经病理确诊为LSIL患者的临床资料,根据末次随访病理学检查结果将其分为进展组（17例）、持续组（27例）和消退组（76例）。取首次活检宫颈组织标本,采用免疫组化法检测CK8、P53、Ki-67表达。多因素Logistic回归分析LSIL患者疾病进展的危险因素,受试者工作特征（ROC）曲线分析CK8、P53、Ki-67评估LSIL患者疾病进展的效能。结果：进展组宫颈组织中CK8、P53及Ki-67阳性表达率高于持续组和消退组（P＜0.05）,持续组宫颈组织中CK8、P53及Ki-67阳性表达率高于消退组（P＜0.05）。高危人乳头瘤病毒（HPV）感染、CK8阳性细胞占比（较高）、P53阳性细胞占比（较高）、Ki-67阳性细胞占比（较高）是LSIL患者疾病进展的危险因素（P＜0.05）。联合CK8、P53、Ki-67阳性细胞占比预测LSIL患者疾病进展的曲线下面积为0.846,高于单独指标预测的0.637、0.697、0.744。结论：LSIL进展宫颈组织中CK8、P53、Ki-67阳性表达率明显升高,CK8、P53、Ki-67阳性细胞占比升高增加了LSIL患者疾病进展的风险,可作为辅助评估 LSIL进展的生物学指标。     

桑葚花色苷对乳腺癌裸鼠肿瘤组织中VEGF、p53 及Ki67 表达的影响

目的：探究桑葚花色苷对乳腺癌裸鼠肿瘤组织中VEGF、p53 及Ki67 表达的影响。方法：选择60 只健康BALB/c 裸鼠,按随 机数字表分为5 组,即对照组、桑葚花色苷低剂量组(SL组)、桑葚花色苷中剂量组(SM组)、桑葚花色苷高剂量组(SH 组)以及阳性 药(氟尿嘧啶)组,每组12 只裸鼠。以注射乳腺癌MDA-MB-231细胞悬液到裸鼠右肩皮下的方法建立移植乳腺癌模型,分别检测 和比较各组裸鼠的癌瘤湿重、癌重系数以及肿瘤组织中VEGF与p53、Ki67 的表达。结果：治疗后,与对照组相比,各治疗组的癌 瘤湿重水平及癌重系数均明显下降;与阳性药组相比,SM组及SH 组的癌瘤湿重以及癌重系数下降程度更为明显,差异均具有统 计学意义(P＜0.05);治疗后,与对照组相比,各治疗组的VEGF与p53、Ki67 阳性表达率均明显下降;且与阳性药组相比,SM组及 SH 组的VEGF与p53、Ki67 阳性率下降程度更为明显,差异均具有统计学意义(P＜0.05)。结论：桑葚花色苷能够明显抑制乳腺癌 的发展,这可能与其抑制P53、Ki67 在和VEGF的表达有关。     

胃癌中P16、nm23-h1、P53表达及其与患者预后的关系

目的:探讨胃癌组织中P16,nm23-h1和P53表达情况及其与患者预后的关系。方法:应用免疫组化SABC法检测91例手术切除胃癌组织中P16,nm 23-h1和P53表达。结果:胃癌中P16,nm23-h1和P53表达阳性率分别33．0%(30/91),38．5%(35/91), 53．8%(49/91)。p16,nm23-h 1和P53在胃癌中表达与淋巴结有无转移,不同的浸润深度,TNM分期,不同组织学类型均有显著差异(P＜0．05)。而它们与肿瘤患者年龄,性别差异无统计学意义(P＞0．05)。等级相关分析结果显示P16与P53表达呈负相关(P＜0．05),P16与nm23-h1表达呈正相关(P＜0．05),P53与nm23-h1表达呈负相关(P＜0．05)。生存曲线研究结果显示P16,nm23-h1和P53表达与患者术后生存时间显著相关(P＜0．05)。结论:P16和nm23-h1在胃癌组织中低表达及P53高表达能客观反映胃癌组织分化程度,侵袭转移能力,且其与患者预后密切相关。故检测三种指标可作为正确判断胃癌患者预后,在指导临床治疗方面有一定价值。     

肺磨玻璃结节中ki-67的表达及与P53,EGFR,CEA相关性研究

目的:为探究不同病理类型的肺磨玻璃结节(ground-glass opacity,GGO)中ki-67的表达情况及其与肺癌相关标志物p53、p63、EGFR等表达的相关性。方法:收集从2012年10月至2014年10月我院胸外科收治的254例GGO病人的临床病史、影像、病理及血常规等资料予以回顾性分析。结果:Ki-67表达量从良性组(n=66),不典型腺瘤样增生(atypical adenomatous hyperplasia,AAH,n=27),到原位癌(adenocarcinoma in situ,AIS,n=11),微浸润腺癌(minimally invasive adenocarcinoma,MIA,n=108),最后到浸润性腺癌(invasive adenocarcinoma,IAC,n=42)即随着早期肺癌的演进过程不断增高。Ki-67与各标志物的相关系数为0.386(p53,P0.001)、0.227(EGFR,P=0.024)、0.441(CEA,P0.001)。通过ROC曲线分析得到ki-67来判别良恶性GGO的曲线下面积和最佳阈值,也得到了早期肺癌演进过程中ki-67阈值变化。恶性GGO组全血细胞中平均单核细胞含量低于良性组GGO,且差异有统计学意义。结论:ki-67表达量在不同病理类别的GGO中有显著性差异,且在肺癌演进过程中依次增高,可作为鉴别早期肺癌不同病理类型的参考依据和预后因子;ki-67与P53、EGFR及CEA的表达具有一定的相关性。     

能谱CT成像对甲状腺癌局部浸润深度的诊断价值及其定量参数与肿瘤组织中Ki67、VEGF、CD34、EGFR的相关性

摘要 目的：探讨能谱CT成像对甲状腺癌局部浸润深度的诊断价值及其定量参数与肿瘤组织中Ki67、VEGF、CD34、EGFR的相关性。方法：回顾性分析2018年6月-2021年6月我院经手术或穿刺活检病理证实为甲状腺肿瘤性病变的患者96例，其中29例为甲状腺癌局部浸润组（A组），34例为甲状腺癌无浸润组（B组），33例为甲状腺腺瘤组（C组）。另取56例甲状腺另一侧叶正常组织作为对照组（D组）。所有患者均完善能谱CT检查，采集图像后在能谱CT Viewer分析软件上测量病变区碘浓度，计算能谱曲线斜率。采用免疫组织化学染色分析Ki-67、VEGF、CD34、EGFR的表达情况。采用Spearman秩相关分析评价碘浓度、能谱曲线斜率与甲状腺癌肿瘤组织中Ki-67、VEGF、CD34、EGFR表达的相关性。结果：在平扫、动脉期、静脉期，A组、B组、C组和D组的碘浓度逐渐增大，两两比较差异均有统计学意义（P＜0.05）。甲状腺癌局部浸润组织能谱曲线呈"低平型"，斜率为较小负值，正常甲状腺组织能谱曲线为下降型，斜率为负值；在平扫、动脉期、静脉期，A组、B组、C组和D组的能谱曲线斜率逐渐变小，差异均有统计学意义（P＜0.05）。A组中Ki-67、VEGF、CD34和EGFR的阳性表达率均高于B组和C组，差异均有统计学意义（P＜0.05）。碘浓度在动脉期、静脉期与Ki-67、VEGF、CD34、EGFR表达呈正相关（P＜0.05），碘浓度在平扫与Ki-67表达呈正相关（P＜0.05），碘浓度在平扫与VEGF、CD34、EGFR表达无相关性（P＞0.05）。能谱曲线斜率在动脉期、静脉期与Ki-67、VEGF、CD34、EGFR表达呈正相关（P＜0.05），能谱曲线斜率在平扫与VEGF表达呈正相关（P＜0.05），能谱曲线斜率在平扫与Ki-67、CD34、EGFR表达无相关性（P＞0.05）。结论：能谱CT成像检查对甲状腺癌局部浸润深度的判断具有重要的价值，其定量参数碘浓度、能谱曲线斜率与Ki67、VEGF、CD34、EGFR具有相关性，可间接反映肿瘤微血管、肿瘤血管生成、甲状腺癌分化程度、浸润程度等情况，对评价甲状腺癌生物学行为可提供有价值的信息。     

替吉奥联合奥沙利铂对转移性三阴乳腺癌患者随机对照研究及对PTEN、p53的影响

为了探讨替吉奥联合奥沙利铂对转移性三阴乳腺癌患者随机对照研究及对血清P53抗体(serum P53antibody,P53)、第十号染色体同源丢失性磷酸酶-张力蛋白基(phosphatase and tensin homolog deleted from chromosome ten,PTEN)的影响。将90例转移性三阴乳腺癌患者按系统随机化法分为对照组45例和观察组45例。对照组采用奥沙利铂135 mg/m~2+1 000 m L Glu,静脉滴注,每4周1次,行3个疗程的化疗。观察组在对照组的基础上加用替吉奥胶囊40~60 mg/次,2次/d,每4周1次进行治疗,行3个疗程的化疗。比较2组患者的治疗后的临床疗效、血清P53、PTEN及HIF-α水平及毒副作用。结果表明观察组的总有效率及控制率与对照组比较无明显差异(p0.05),但观察组患者的稳定率(44.44%)明显高于对照组(22.22%)(p0.05)。2组患者的P53、HIF-α指标与治疗前相比均明显降低(p0.05),且观察组患者低于对照组(p0.05);2组患者的PTEN水平与治疗前相比,均明显升高(p0.05),且观察组高于对照组(p0.05)。观察组患者不良反应发生率为11.11%与对照组的17.77%相比,无明显差异(p0.05)。替吉奥联合奥沙利铂治疗转移性三阴乳腺癌疗效肯定,能改善患者血清P53、PTEN及HIF-α水平,且毒副反应小。     

ER、PR、CA-153、Ki-67的表达与乳腺癌临床病理特征及预后的相关性研究

目的:研究雌激素受体(ER)、孕激素受体(PR)、糖类抗原-153(CA-153)、Ki-67的表达与乳腺癌临床病理特征及预后的相关性。方法:选取2015年3月-2017年4月我院收治的乳腺癌患者190例为研究对象。分别采用免疫组化法检测患者ER、PR、Ki-67表达情况,采用酶联免疫吸附法检测CA-153表达情况。分析上述四项指标的表达与临床病理特征的关系,并作指标间的相关性分析。结果:有淋巴结转移的乳腺癌组织中ER、PR阳性率明显高于无淋巴结转移,差异有统计学意义(P0.05),而年龄、肿瘤大小、TNM分期不同的乳腺癌组织中ER、PR阳性率比较差异均无统计学意义(P0.05)。肿瘤大小2cm、TNM分期为Ⅲ-Ⅳ期、有淋巴结转移乳腺癌组织中CA-153阳性率分别高于肿瘤大小≤2cm、TNM分期为Ⅰ-Ⅱ期、无淋巴结转移,差异均有统计学意义(P0.05),而年龄不同的乳腺癌组织中CA-153阳性率比较差异无统计学意义(P0.05)。TNM分期为Ⅲ-Ⅳ期、有淋巴结转移乳腺癌组织中Ki-67阳性率明显高于TNM分期为Ⅰ-Ⅱ期、无淋巴结转移,差异均有统计学意义(P0.05),而年龄、肿瘤大小不同的乳腺癌组织中Ki-67阳性率比较差异无统计学意义(P0.05)。经Pearson相关性分析显示,ER、PR、CA-153、Ki-67在乳腺癌中表达均呈正相关(P0.05)。结论:临床工作中可通过联合检测ER、PR、CA-153、Ki-67的表达情况,从而有效判断乳腺癌患者的病情严重程度以及转移情况,值得临床推广应用。     

Hybridization and recombination in the yeasts Pichia alni, P. bimundalis, P. finlandica, P. glucozyma, P. henricii, P. hostii, P. minuta var. nonfermentans, P. muscicola

A collection of genetic lines in 8 reproductively isolated Pichia species has been created. The above data have permitted realizing intraspecific hybridization and showing normal meiotic segregation of auxotrophic markers.     

Comparative genome mapping among Populus adenopoda, P. alba, P. deltoides, P. euramericana and P. trichocarpa

Among the genus Populus, the sections Populus (white poplar), Aigeiros Duby (black poplar) and Tacamahaca Spach contain many tree species of economical and ecological important properties. Two parental maps for the inter-specific hybrid population of Populus adenopoda × P. alba (two species of Populus section) were constructed based on SSR and SRAP markers by means of a two-way pseudo-test cross mapping strategy. The same set of SSR markers developed from the P. trichocarpa (belonging to Tacamahaca section) genome which were used to construct the maps of P. deltoides and P. euramericana (two species of Aigeiros section) was chosen to analyze the genotype of the experimental population of P. adenopoda × P. alba. Using the mapped SSR markers as allelic bridges, the alignment of the white and black poplar maps to each other and to the P. trichocarpa physical map was conducted. The alignment showed high degree of marker synteny and colinearity and the closer relationship between Aigeiros and Tacamahaca sections than that of Populus and Tacamahaca. Moreover, there was evidence for the chromosomal duplication and inter-chromosomal reorganization involving some poplar linkage groups, suggesting a complicated course of fission or fusion in one of the lineages. A poplar consensus map based on the comparisons could be constructed will be useful in practical applications including marker assisted selection.     

A comparative cytogenetic analysis of five pine species from North America, Pinus banksiana, P. contorta, P. monticola, P. resinosa, and P. strobus

The genus Pinus comprises more than 100 species, which are widely distributed in the Northern hemisphere. Cytogenetic information on North American pines is very limited despite their economic importance. In the present study, a detailed comparative cytogenetic analysis is presented for five pine species from North America, P. resinosa, P. monticola, P. contorta, P. banksiana, and P. strobus. Morphometric analysis and physical mapping of rDNA probes were performed. The karyotype of P. monticola was considered ancestral with small difference in relative chromosome lengths. P. banksiana, P. contorta, and P. strobus karyotypes were considered semi-asymmetrical and less ancestral type. P. banksiana showed five secondary constrictions, P. strobus six, and P. contorta eight. P. resinosa karyotype was semi-asymmetrical and derived with 14 secondary constrictions identified on eight different chromosomes. Karyological data were consistent with molecular cytogenetic information. A significant association was observed between the number and locations of secondary constrictions and the 18S-5.8S-26S rDNA sites detected using fluorescence in situ hybridization. The two methods were used to establish a reliable comparative karyotype of the selected pines. In general, karyotype and chromosome evolution were not related to genetic relationships among pine species studied.     

P63 and P73: P53 mimics, menaces and more

Inactivation of the tumour suppressor p53 is the most common defect in cancer cells. The discovery of its two close relatives, p63 and p73, was therefore both provocative and confounding. Were these new genes tumour suppressors, p53 regulators, or evolutionary spin-offs? Both oncogenic and tumour-suppressor properties have now been attributed to the p53 homologues, perhaps reflecting the complex, often contradictory, protein products encoded by these genes. p63 and p73 are further implicated in many p53-independent pathways, including stem-cell regeneration, neurogenesis and sensory processes.     

Mapping of the genes encoding tum- transplantation antigens P91A,P35B,and P198

Tum ^- comprises a class of genes, mutation of which in P815 tumor cells has led to the acquisition of new cytotoxic T cell-recognized epitopes. The cells carrying the mutant alleles have impaired tumorigenicity compared with their progenitors due to in vivo induction of a cytotoxic T-cell response specific for tum ^- antigens. Two tum ^- genes, P91A and P35B, were found to be single copy loci mapping to chromosomes 11 and 15 respectively. A third, P198, was found to map to chromosome 7 and to be a member of a small gene family with other members on chromosomes 13, 14, and 15. Multiple P198-related sequences were found in other mammalian species suggesting the P198 related gene family is a general feature of mammalian genomes.     

Ecophysiological variabilities in ectohydrolytic enzyme activities of some Pseudoalteromonas species,P. citrea,P. issachenkonii,and P. nigrifaciens

The ecophysiological variabilities in the ectohydrolytic enzyme profiles of the three species of Pseudoalteromonas, P. citrea, P. issachenkonii, and P. nigrifaciens, have been investigated. Forty-one bacteria isolated from several invertebrates, macroalgae, sea grass, and the surrounding water exhibited different patterns of hydrolytic enzyme activities measured as the hydrolysis of either native biopolymers or fluorogenic substrates. The activities of the following enzymes were assayed: proteinase, tyrosinase, lipase, amylase, chitinase, agarase, fucoidan hydrolase, laminaranase, alginase, pustulanase, cellulase, beta-glucosidase, alpha- and beta-galactosidases, beta-N-acetylglucosaminidase, beta-glucosaminidase, beta-xylosidase, and alpha-mannosidase. The occurrence and cell-specific activities of all enzymes varied over a broad range (from 0 to 44 micromol EU per hour) and depended not only on taxonomic affiliation of the strain, but also on the source/place of its isolation. This suggests 'specialization' of different species for different types of polymeric substrates as, for example, all strains of P. citrea and P. issachenkonii hydrolyzed alginate and laminaran, while strains of P. nigrifaciens were lacking the ability to hydrolyze most of the algal polysaccharides. The incidence of certain enzymes such as fucoidan hydrolases, alginate lyases, agarases, and alpha-galactosidases might be strain specific and reflect its particular ecological habitat.