Hepatitis C virus in human B lymphocytes transformed by Epstein-Barr virus in vitro by in situ reverse transcriptase-polymerase chain reaction

AIM: To study persistence and replication of hepatitis C virus (HCV) in patients' peripheral blood mononuclear cells (PBMC) cultured in vitro. METHODS: Epstein Barr virus (EBV) was used to transform the hepatitis C virus from a HCV positive patient to permanent lymphoblastoid cell lines (LCL). Positive and negative HCV RNA strands of the cultured cells and growth media were detected by reverse transcriptase-polymerase chain reaction (RT-PCR) each month. Core and NS5 proteins of HCV were further tested using immunohistochemical SP method and in situ RT-PCR. RESULTS: HCV RNA positive strands were consistently detected the cultured cells for one year. The negative-strand RNA in LCL cells and the positive-strand RNA in supernatants were observed intermittently. Immunohistochemical results medicated expression of HCV NS3 and C proteins in LCL cytoplasm mostly. The positive signal of PCR product was dark blue and mainly localized to the LCL cytoplasm. The RT-PCR signal was eliminated by overnight RNase digestion but not DNase digestion. CONCLUSION: HCV may exist and remain functional in a cultured cell line for a long period.

DETECTION OF BREAST CANCER MICROMETASTASES IN BONE MARROW USING REVERSE-TRANSCRIPTASE CHAINREACTION AND SOUTHERN HYBRIDIZATION

Objective: The aim of this study was to detect micrometastases in bone marrow of primary breast cancer patients, and compare with other clinical parameters. Methods: Cytokeratin 19 (CK-19) gene mRNA expression was detected by reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blot hybridization. Human breast cancer cell line T47D was mixed with bone marrow cells in different proportions. The positive detection rate was compared among RT-PCR, Southern blotting and immunohistochemistry (IHC) methods. Results: Cytokeratin 19 gene was expressed in all 6 positive control samples while the expression was not seen in 8 negative control samples. In all 54 patients 14 cases were CK-19 positive (25.9%) by RT-PCR, another positive signal was obtained in 5/54 (9.3%) of bone marrow samples by Southern blotting. The total positive cases are 19/54 (35.2%). CK-19 IHC+ cells were detected at a dilution of one T47D cell in 5×104 bone marrow cells, while the sensitivity detected by PCR and Southern blot hybridization was at 1∶5×105 and 1∶1×106, respectively. This demonstrates that RT-PCR and Southern blotting was at least 20 times more sensitive than the IHC method. The micrometastases positive rate of the larger tumor size group (>5.0 cm) was significantly (P<0.05) greater than that of the smaller tumor size group (0–2.0 cm). Conclusion: detection of micrometastases in bone marrow by RT-PCR and Southern blotting, using CK-19 as a biological marker, is highly sensitive and it is a method to be used for anticipating the prognosis of breast cancer patients.

COMBINED DETECTION OF BREAST CANCER MICROMETASTASES IN THE LYMPH NODES AND BONE MARROW USING REVERSETRANSCRIPTASE CHAIN REACTION AND SOUTHERN HYBRIDIZATION

Objective: The presence of lymph nodes and bone marrow micrometastases of patients with breast carcinoma by immunohistochemistry (IHC) methods has been strongly correlated to early recurrence and shorter overall survival. The aim of this study was to detect micrometastases in matched sample pairs of lymph nodes and the bone marrow of primary breast cancer patients using a more sensitive method, and compare with other clinical parameters. Methods: Cytokeratin 19 (CK-19) gene mRNA expression was detected by reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blot hybridization. Human breast cancer cell line T47D was mixed with bone marrow cells at different proportions. The positive detection rate was compared among RT-PCR, Southern blotting and IHC methods. Results: Cytokeratin 19 gene was expressed in all 6 positive control samples, while the expression wasn’t seen in 18 negative control samples. CK-19 IHC positive cells were detected at a dilution of one T47D cell in 5×105 bone marrow cells, while the sensitivity detected by PCR and Southern blot hybridization was at 1:5×104 and 1:106, respectively. In the samples from the 35 patients, we found CK-19 positive cells in 2 cases (5.7%) by IHC. CK-19 gene expression signal was detected in 14/35 (40%) by RT-PCR, and 17/35 (48.6%) by southern blotting. Four cases were micrometastases positive both in lymph node and bone marrow (11.4%). There was no correlation between CK-19 detection and other clinical parameters. Conclusion: combined detection of micrometastases in lymph node and bone marrow by RT-PCR and Southern blotting, using CK-19 as a biological marker, is a highly sensitive method for breast cancer.

Detection of SYT-SSX fusion transcripts in paraffin-embedded tissues of synovial sarcoma by reverse transcription-polymerase chain reaction

OBJECTIVE: To assess the feasibility of detecting SYT-SSX fusion transcripts in paraffin-embedded tissues of synovial sarcoma by reverse transcription-polymerase chain reaction (RT-PCR). METHODS: RT-PCR was used to amplify the SYT-SSX fusion transcripts using archival formalin-fixed paraffin-embedded tumor specimens from a series of 37 synovial sarcoma cases. To investigate the specificity of the SYT-SSX fusion transcripts, a variety of non-synovial sarcoma tumors were included in the study as negative controls. The detected messages derived from fusion genes were confirmed by subsequent sequence analysis. RESULTS: SYT-SSX fusion transcripts were detected in 33 of 37 (89.2%) synovial sarcomas. None of the 34 cases of non-synovial sarcoma tumors showed amplified products of SYT-SSX fusion transcripts, although PBGD mRNA was detected in all specimens. Among 33 SYT-SSX-positive synovial sarcomas, 22 tumors had an SYT-SSX 1 fusion transcript, whereas 6 tumors had an SYT-SSX2 fusion transcript. Fusion types can not be distinguished in the remaining 5 cases. There was a significant relationship between SYT-SSX fusion type and histologic subtype. All 10 biphasic synovial sarcomas had the SYT-SSX1 fusion, whereas all tumors with SYT-SSX2 were of monophasic morphology (P

SEQUENCE ANALYSIS OF THE NS5 REGION OF GBVC/HGV AND DETECTION OF THE VIRUS BY REVERSE TRANSCRIPTASE PCR

GBV C/HGV is a newly identified virus associated with human hepatitis In this study, the nucleotide sequences of the partial NS5 gene of GBV C/HGV derived from sera of 8 Chinese patients were determined The nucleotide homology among the 8 isolates were 92% on average On the basis of sequence analysis, two sets of oligonucleotide primers derived from highly conserved region of GBV C/HGV NS5 gene were designed to establish both sensitive and specific nested PCR for detection of GBV C/HGV RNA 253 Chinese patients were examined for the virus RNA GBV C/HGV RNA positive rates in patients infected with HBV, HCV and patients with chronic non B,non C hepatitis were 18 4%, 19 8% and 8 9% respectively This result suggested that HBV,HCV and GBV C/HGV shared the same transmission risk factors 8 patients with GBV C/HGV and HCV coinfection were retrospectively observed for the response to interferon Coinfection with GBV/HGV did not negatively influence the responsiveness of HCV, and GBV C/HGV was sensitive to interferon to a certain degree

新型冠状病毒Omicron I1566V突变位点MS2噬菌体病毒样颗粒的构建

目的构建新型冠状病毒Omicron I1566V突变位点MS2噬菌体病毒样颗粒。方法选取并合成带有6×His标签的MS2噬菌体的衣壳蛋白(CP)、成熟蛋白(A蛋白)及Omicron I1566V突变基因序列,插入pACYCDuet-1质粒构建重组载体,通过原核系统诱导表达目的蛋白,纯化重组蛋白后利用透射电镜对蛋白质进行物理表征,最后通过反转录聚合酶链反应(RT-PCR)检测病毒样颗粒的热稳定性及耐核酸酶水解能力。结果成功构建包含有6×His标签的CP、A蛋白和Omicron I1566V突变基因序列的重组载体,经限制性内切酶BamHⅠ和KpnⅠ酶切鉴定和测序验证,结果均与预期相符。经诱导并纯化后,通过电镜观察到了大小均匀、直径为23~28 nm的病毒样颗粒,该病毒样颗粒经核酸酶消化后可在37℃条件下稳定储存20 d以上。结论该研究成功利用MS2噬菌体的CP和A蛋白构建了Omicron I1566V突变位点病毒样颗粒,为该突变位点的RT-PCR检测体系提供了可靠的质量保障。

Epidemiological and Subtype Characterization of Influenza Viruses Infection in Children in Shenzhen, China during Three Consecutive Seasons (January 2016-December 2018)

Background: Children with seasonal influenza infection cause a significant burden of disease each year in the pediatric clinic. Influenza A and B viruses are the major types responsible for illness. A better understanding of the periodicity facilitates the prevention and control of influenza in children. Objective: This study aims to analyze the epidemiological patterns and subtype characterization of influenza viruses among children in Shenzhen, China. Methods: Influenza samples were collected by nasopharyngeal swabs from influenza like illness patients in Shenzhen Children’s Hospital from January 2016 to December 2018. The positive cases and influenza subtypes were determined by gold labeled antigen detection and reverse transcriptase polymerase chain reaction. The influenza periodicity and age, subtype distribution as well as the association between climate parameters and different influenza subtypes were analyzed by SPSS 22.0. Results: The influenza positive rate during 2016-2018 was 21.0%, with a highest positive rate in the year 2018. The positive rate varied by month, season, and year describing a sequence of peaks presenting primarily in all year including spring, summer and winter. The characteristics of influenza peak were different in each year, with a spring peak in 2016 and a summer plus a winter-spring peaks in 2017 and 2018. In addition, influenza B exhibited a winter-spring seasonal pattern while influenza A displayed a more variable seasonality, highlighting influenza B rather than influenza A which had a negative association with climate parameters. Influenza-positive cases were older than influenza-negative cases (P P Conclusion: Influenza activity in children from Shenzhen typically displays both winter-spring and summer peaks. Influenza A epidemic occurred separately or co-circulated with influenza B, with a winter-spring pattern for influenza B and a much more variable seasonality for influenza A. Influenza B had a negative association with climate parameters. In addition, hospitalization with influenza often occurs in younger individuals infected with influenza A.

肝癌患者血清中lncRNA HOTAIR表达与临床病理特征的相关性及诊断价值

目的分析血清长链非编码RNA HOX转录反义RNA(IncRNA HOTAIR)在肝癌患者中的表达与临床诊断意义。方法选取100例肝癌患者为研究对象,并将其纳入肝癌组,另选取同期收治的80例肝硬化患者纳入肝硬化组,同时选取同期行体检的75例健康体检者纳入对照组。采集3组5 ml静脉血,以实时荧光定量逆转录聚合酶链反应(RT-PCR)检测对比3组血清IncRNA HOTAIR相对表达量。同时,收集肝癌患者的年龄、性别等一般资料,分析血清IncRNA HOTAIR与其临床病理特征的关系;另外绘制受试者工作曲线(ROC),分析血清IncRNA HOTAIR在肝癌中的诊断效能。结果肝癌组的IncRNA HOTAIR相对表达量[(2.53±0.58)]高于肝硬化组[(0.81±0.25)]与对照组[(0.20±0.05)],差异有统计学意义(P<0.05)。IncRNA HOTAIR表达与肝癌患者的TNM分期、血管侵犯、肝外转移有关,差异有统计学意义(P<0.05);IncRNA HOTAIR表达与患者的年龄、性别、肿瘤数目无关,差异无统计学意义(P>0.05)。ROC结果显示:血清IncRNA HOTAIR诊断肝癌的AUC为0.901(95%CI:0.852~0.949),具有较高的诊断价值。结论肝癌患者血清内IncRNA HOTAIR呈高表达,其表达水平与患者TNM分期、血管侵犯、肝外转移相关,可能参与肝癌的发生、发展,在肝癌中具有较高的临床诊断意义。

2019—2021年安徽省合肥市某三甲医院住院的严重急性呼吸道感染患者的监测分析

目的分析2019—2021年在安徽省合肥市第二人民医院住院的严重急性呼吸道感染(SARI)患者的监测结果。方法筛查2019年1月—2021年12月安徽省合肥市第二人民医院住院部监测科室(呼吸内科、儿内科与重症监护科)SARI患者的资料,并采集患者鼻咽拭子、呼吸道分泌物,通过反转录聚合酶链反应(RT-PCR)检测甲乙通用性流感病毒。结果2019—2021年,共监测SARI患者934例,占监测科室同期入院病例的12.04%;2019年、2020年和2021年,SARI患者分别占入院患者的10.62%、14.90%和11.40%。2020年,检测出的SARI患者占比较高。2019—2021年,SARI监测病例主要集中于冬春季节,以5岁以下儿童病例占比较大(54.82%),男女比例为1.66∶1。SARI的监测科室分别为儿内科(82.12%)、呼吸内科(17.77%)以及重症监护科(0.11%);2019—2021年采集的934份咽拭子标本经实验室检测,阳性标本39份,阳性率为4.17%,主要感染病毒类型为B型Victoria系[27例(69.23%)]。SARI与流感阳性感染患者中合并症最常见的为肺炎,SARI合并并发症的467例患者中,99.36%的患者转归为治愈或好转,不合并并发症的患者中,99.57%的患者转归为治愈或好转,差异无统计学意义(P=1.000)。SARI病例采样前最常用的药物为抗生素与神经氨酸酶抑制剂类抗病毒药物。SARI病例中,使用抗病毒药物的患者中有98.66%疾病转归为治愈或好转,而不使用抗病毒药物的患者中,99.53%的患者疾病转归为治愈或好转,差异无统计学意义(P=0.343)。结论2019—2021年,在安徽省合肥市第二人民医院住院的SARI病例多为男性、儿童、老人,冬春季为高发季节,流感阳性患者主要感染菌株均为FluB,且所有患者转归情况较好。

急性胰腺炎病人血清长链非编码RNA核富集转录体1、Toll样受体2表达变化及临床意义研究

目的探讨急性胰腺炎(AP)病人血清长链非编码RNA核富集转录体1(LncRNA NETA1)、Toll样受体2(TLR2)表达及临床意义。方法选取2017年5月至2020年12月石家庄平安医院收治的AP病人125例为研究对象,根据急性生理学和慢性健康状况评价Ⅱ(APACHEⅡ)对AP病人进行评分,并将病人分为轻症组56例,重症组69例;根据住院期间重症组AP病人预后情况,将病人分为预后不良25例,预后良好44例。同期选取该院健康体检者130例为健康组。实时荧光定量逆转录聚合酶链反应(qRT-PCR)检测血清LncRNA NETA1水平,酶联免疫吸附测定(ELISA)检测血清TLR2水平;Pearson相关性分析探索AP病人血清LncRNA NEAT1、TLR2水平相关性及二者与病人APACHEⅡ评分的关系;受试者操作特征曲线(ROC曲线)分析血清LncRNA NEAT1、TLR2对AP病人重症的评估价值。结果与健康组比较,AP组血清LncRNA NEAT1(2.16±0.31比1.00±0.00)、TLR2水平[(6.43±1.05)µg/L比(0.59±0.24)µg/L]升高(P<0.05);与轻症组比较,重症组AP病人血清LncRNA NEAT1(2.31±0.33比1.98±0.27)、TLR2水平[(6.89±1.16)µg/L比(5.86±0.92)µg/L]升高(P<0.05);与预后良好组比较,预后不良组重症AP病人血清LncRNA NEAT1(2.43±0.36比2.14±0.27)、TLR2水平[(7.12±1.24)µg/L比(6.45±1.02)µg/L]升高(P<0.05);Pearson相关性分析结果表明,AP病人血清LncRNA NEAT1、TLR2呈正相关(r=0.65,P<0.05),二者与病人APACHEⅡ评分均呈正相关(r=0.50、0.52,P<0.05);ROC曲线结果显示,血清LncRNA NEAT1水平、TLR2单独及联合评估AP病人重症的曲线下面积(AUC)分别为0.73[95%CI:(0.64,0.82)]、0.75[95%CI:(0.67,0.84)]、0.88[95%CI:(0.82,0.94)],血清LncRNA NEAT1联合TLR2水平预测AP病人重症的AUC明显大于二者单独预测(P<0.05)。结论AP病人血清LncRNA NEAT1、TLR2表达水平显著升高,且与病人严重程度和预后有关,临床上检测LncRNA NEAT1、TLR2表达可能有助于AP病人的病情评估。

常见白血病融合基因筛查在白血病诊断与分型中的意义

目的: 分析病人白血病细胞染色体畸变涉及的86种融合基因和临床白血病类型的相关性,探讨常见融合基因筛查法在临床诊断和分型中的应用价值。方法: 收集161例初发或者复发的白血病患者及8例骨髓增生异常综合征(MDS)患者的骨髓细胞,提取RNA,用32条特异性引物逆转录为cDNA,利用白血病29种染色体畸变形成的融合基因的86种mRNA剪接变异体引物,分8管进行多重RT PCR,筛查白血病融合基因。结合临床状态和形态学观察了解融合基因与白血病类型的关系。结果: 白血病中115例(71% )分别检测出10种白血病常见融合基因,包括AML1 /ETO、PML/RARα、PLZF/RARα、dupMLL、MLL/AF6、MLL/AF10、CBFβ/MYH11、BCR/ABL、Hox11、Evi1。其中52例慢性粒细胞白血病(CML)100%检出BCR/ABL; 25例急性早幼粒细胞白血病(APL)中88%检出融合基因,其中21例APL检测出PML/RARα, 1例APL检测出PLZF/RARα; AML1 /ETO阳性的17例急性白血病(AL)16例为FAB M2亚型, 1例为混合型白血病; CBFβ/MYH11阳性的4例AL3例为FAB分型的M4, 1例为M5,属于向粒单细胞系统分化的白血病。16例AL检测出MLL基因异常,其中MLL/AF6白血病均为FAB分型的M5,具有典型的原始单核细胞白血病的特征。17例急性淋巴细胞白血病(ALL) 5例检测出BCR/ABL。8例MDS病人中2例检测出融?

中药滋补肝肾方对鼠B16黑素瘤细胞酪氨酸酶mRNA表达的调节

目的 探讨中药滋补肝肾方治疗白癜风的分子学作用机制。方法 采用定量逆转录 聚合酶链式反应(RT PCR)方法 ,观察中药滋补肝肾方对鼠B16黑素瘤细胞株酪氨酸酶mRNA表达的影响。结果 中药滋补肝肾方能使黑素瘤细胞酪氨酸酶mRNA表达水平增加。结论 中药滋补肝肾方能上调黑素细胞酪氨酸酶mRNA表达水平 ,这是其治疗白癜风的药理作用机制之一。

大豆异黄酮对胰岛素抵抗大鼠胰岛素敏感性及瘦素基因表达的影响

目的:观察大豆异黄酮(SIF)对高脂膳食诱导的胰岛素抵抗(IR)大鼠血清瘦素水平及白色脂肪组织瘦素mRNA表达的影响,并探讨SIF提高胰岛素敏感性的可能机制。方法:选用高脂饲料诱导的IR雄性SD大鼠,根据其胰岛素抵抗指数(IRI)随机分为模型对照组(水)和3个SIF组(50 mg／kg,150 mg/kg及450 mg／kg)。各组经口灌胃给予相应受试物1个月,空腹过夜后取材,用酶法检测各组动物空腹血糖、用放射免疫法检测空腹血胰岛素、用酶联免疫法检测血清瘦素含量,以实时定量RT-PCR法检测肾周脂肪组织瘦素基因的mRNA水平。结果:与模型对照组比较,SIF 150 mg／kg和450 mg／kg组能显著降低空腹血胰岛素水平及IRI,SIF450 mg／kg组能明显降低大鼠体重及肾周脂肪组织瘦素基因mRNA的表达、提高血清瘦素的含量。结论:SIF可能具有改善瘦素抵抗的作用,并进而提高胰岛素的敏感性。

用反转录聚合酶链反应检测禽呼肠孤病毒的研究

本文报告了建立反转录聚合酶链反应（ Ｒ Ｔ Ｐ Ｃ Ｒ）检测禽呼肠孤病毒（ Ａ Ｒ Ｖ）的方法，根据禽呼肠孤病毒 Ｓ１１３３ 毒株 Ｓ１ 基因序列，设计合成两对引物，用 Ｒ Ｔ Ｐ Ｃ Ｒ 技术对 ６ 株禽呼肠孤病毒国际标准株进进行了检测。结果两对引物对 ６ 株 Ａ Ｒ Ｖ 均可扩增出与预期大小相符 ５３２ｂｐ 和 ４３５ｂｐ 的 Ｒ Ｔ Ｐ Ｃ Ｒ 产物，而对其它 ６ 种禽病病原核酸的扩增结果均为阴性；该 Ｒ Ｔ Ｐ Ｃ Ｒ 可以检测出 １ｐｇ 的 Ａ Ｒ Ｖ Ｒ Ｎ Ａ 模板。

RT-PCR技术诊断猪瘟的应用研究

应用反转录_聚合酶链反应 (RT_PCR)对猪瘟进行诊断应用研究。应用RT_PCR对来自广西不同地区的 135份疑似猪瘟病料进行检测 ,84份诊断为阳性 ,阳性率 6 2 .2 %。从百色、柳州地区等采集的健康猪扁桃体和淋巴结共 2 76份 ,经RT_PCR检测 ,37份为阳性 ,阳性率为 13.4 %。其中健康猪扁桃体带毒较高 ,2 4 6份扁桃体中有 35份阳性 ,占 14 .2%。采自柳州健康猪的 2 6份淋巴结材料全为阴性 ,只有邕宁县的 1份健猪淋巴结阳性。结果表明 。

RT-PCR技术检测猪瘟病毒的应用研究

本试验应用反转录_聚合酶链式反应 (RT_PCR)对猪瘟进行诊断应用研究。应用RT_PCR对来自广西不同地区的 135份疑似猪瘟病料进行检测 ,84份诊断为阳性 ,阳性率 6 2 2 %。从百色、柳州地区等采集的健康猪扁桃体和淋巴结共 2 76份 ,经RT_PCR检测 ,37份为阳性 ,阳性率为 13 4 %。其中健康猪扁桃体带毒较高 ,2 4 6份扁桃体中有 35份阳性 ,占 14 2 %。采自柳州健康猪的 2 6份淋巴结材料全为阴性 ,只有邕宁县的 1份健猪淋巴结阳性。结果表明 ,RT_PCR技术可应用于猪瘟的临床诊断。

实验性变态反应性脑脊髓炎大鼠发病中脑组织血红素氧合酶-1基因和蛋白表达的动态变化

为探讨脑组织血红素氧合酶-1(heme oxygenase-1, HO-1)对实验性变态反应性脑脊髓炎(experimentalallergic encephalomyelitis,EAE)的作用, 分别应用逆转录-聚合酶链反应(RT-PCR)和免疫组化技术测定了豚鼠脊髓生理盐水匀浆+完全福氏佐剂诱导EAE大鼠1、7、14、21 d 时, 脑组织HO-1 基因和蛋白表达的动态变化, 并观察与症状之间的关系。结果显示: 对照组大鼠脑组织仅有少量HO-1 基因和蛋白表达; 诱导EAE 后, 伴随着大鼠EAE 症状及脑组织病理损伤的出现和进行性加重, 脑组织HO-1 基因和蛋白表达量逐渐增高。在豚鼠脊髓生理盐水匀浆+ 完全福氏佐剂诱导7 d 后, HO-1 mRNA上升至高峰。14 d 时, HO-1 蛋白表达至高峰, HO-1 阳性细胞主要位于脉络丛、穹隆下器、血管“套袖样”病灶的周围, 与 EAE 病变部位一致。此时大鼠的病情最重、体重减轻最显著、脑组织病理改变最明显。21 d 时脑组织HO-1 基因和蛋白表达量逐渐下降, 大鼠EAE 症状也逐渐减轻。应用HO-1 特异性抑制剂锡原卟啉-9 以抑制脑内HO-1 蛋白表达后, 大鼠EAE 症状和脑组织损伤明显减轻, 说明脑组织HO-1 的动态变化与EAE 症状及脑组织损伤密切相关。提示脑组织HO-1 基因和蛋白过表达对EAE 发病起着重要的作用, 应用 HO-1

大鼠关节软骨酸敏感离子通道的表达

目的探讨大鼠关节软骨酸敏感离子通道(ASICs)的表达及其意义。方法利用RT-PCR和Western blot检测ASICs在大鼠关节软骨的表达。结果大鼠关节软骨存在ASIC1a、ASIC2a和ASIC3 mRNA及其蛋白的表达。结论ASICs在大鼠关节软骨组织的表达,其有望成为关节炎治疗的新靶点。

雌激素受体在原发性肝癌中的表达与变异

目的：通过研究原发性肝癌组织中野生型雌激素受体(wild type Estrogen receptor，wER)以及第5外显子缺失而变异的雌激素受体(variant estrogen receptor，vER)的表达情况，期望对原发性肝癌进行内分泌治疗的可能性进行分析。方法：收集我院原发性肝癌手术切除的标本28例，应用 RT-PCR 的方法分析 wER 与 vER 在 mRNA 水平的表达，同时通过免疫组织化学分析对 ER 在蛋白水平的表达进行检测。结果：免疫组织化学显示原发性肝癌组织中 ER 的表达率为39.3%(11/28)；RT-PCR 显示所有标本中均检测到雌激素受体的表达，89.3%(25/28)的原发性肝癌病人表达 wER，96.4%(27/28)的肝癌表达 vER，其中 wER 和 vER 联合表达的病人为85.7%(24/28)，仅表达wER 的病人为3.5%(1/28)，而仅表达 vER 的为10.7%(3/28)。结论：在原发性肝癌的形成过程中，96.4%(27/28)的肝癌出现 ER 的变异，提示 ER 的变异与原发性肝癌的形成有密切的关系。

改良TRIZOL法从矿化骨组织中提取总RNA

目的:通过对TRIZOL法加以改进,建立一种快速、有效提取矿化骨组织中总RNA的方法。方法:改进TRIZOL法提取骨组织中的总RNA,在异丙醇沉淀RNA时加入高浓度的盐溶液。通过紫外分光光度法和1%甲醛变性琼脂糖凝胶电泳鉴定所提取的RNA。进而以其逆转录所得的cDNA为模板经PCR扩增OPG基因予以鉴定。结果:改良TRIZOL法获得的总RNA完整,纯度好,产量高。结论:改良TRIZOL法是一种从矿化骨组织中提取总RNA的高效、便捷、可靠的方法。