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ＥＮＺＹＭＯ－ＲＯＣＫＥＴＥＬＥＣＴＲＯＰＨＯＲＥＴＩＣＡＳＳＡＹＡＮＤ　ＣＲＯＳＳＥＤＡＦＦＩＮＩＴＹＥＮＺＹＭＯＩＭＭＵＮＯＥＬＥＣＴＲＯＰＨＯＲＥＳＩＳＡＮＤＩＴＳ　ＡＰＬＩＣＡＴＩＯＮＩＮＤＩＡＧＮＯＳＩＳＯＦＰＬＩＭＡＲＹ　ＬＩＶＥＲＣＡＮ...     

ANTICOMPLEMENTARY ACTIVITY IN HUMAN SERUM OF LUNG CANCER PATIENTS AND ITS POSSIBLE CLINICAL SIGNIFICANCE

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PRELIMINARY STUDY OF RETROVIRAL MEDIATED TRANSFER OF THE HUMAN mdr-1 GENE INTO MURINE AND HUMAN HEMATOPOIETIC STEM/PROGENITOR CELLS

ＰＲＥＬＩＭＩＮＡＲＹＳＴＵＤＹＯＦＲＥＴＲＯＶＩＲＡＬＭＥＤＩＡＴＥＤＴＲＡＮＳＦＥＲＯＦＴＨＥＨＵＭＡＮｍｄｒ１ＧＥＮＥＩＮＴＯＭＵＲＩＮＥＡＮＤＨＵＭＡＮＨＥＭＡＴＯＰＯＩＥＴＩＣＳＴＥＭ／ＰＲＯＧＥＮＩＴＯＲＣＥＬＬＳＦｅｎｇＫａｉ冯凯Ｐｅ...     

THE EXPRESSION OF C－MYC AND N－RAS ONCOGENES IN HUMAN HEPATOCELLULAR CARCINOMA－AN IN SITU HYBRIDIZATION STUDY ON PARAFFIN EMBE

ＴＨＥＥＸＰＲＥＳＳＩＯＮＯＦＣ－ＭＹＣＡＮＤＮ－ＲＡＳＯＮＣＯＧＥＮＥＳＩＮＨＵＭＡＮＨＥＰＡＴＯＣＥＬＬＵＬＡＲＣＡＲＣＩＮＯＭＡ－ＡＮＩＮＳＩＴＵＨＹＢＲＩＤＩＺＡＴＩＯＮＳＴＵＤＹＯＮＰＡＲＡＦＦＩＮＥＭＢＥＤＤＥＤＴＩＳＳＵＥＳＥＣＴＩＯＮ...     

CT-GUIDED PERCUTANEOUS TRANSTHORACIC FINENEEDLE ASPIRATION BIOPSY OF SMALL PERIPHERAL PULMONARY LESIONS

ＣＴＧＵＩＤＥＤＰＥＲＣＵＴＡＮＥＯＵＳＴＲＡＮＳＴＨＯＲＡＣＩＣＦＩＮＥＮＥＥＤＬＥＡＳＰＩＲＡＴＩＯＮＢＩＯＰＳＹＯＦＳＭＡＬＬＰＥＲＩＰＨＥＲＡＬＰＵＬＭＯＮＡＲＹＬＥＳＩＯＮＳＺｈａｎｇＪｕｎ张军ＺｈａｏＨｕｉｒｕ赵惠儒ＦｕＺｈｉｍｉｎ付...     

THE IN VITRO POTENTIATION OF LAK CELL CYTOTOXICITY IN CANCER AND AIDS PATIENTS INDUCED BY F3—A FRACTIONATED EXTRACT OF ASTRAG

ＴＨＥＩＮＶＩＴＲＯＰＯＴＥＮＴＩＡＴＩＯＮＯＦＬＡＫＣＥＬＬＣＹＴＯＴＯＸＩＣＩＴＹＩＮＣＡＮＣＥＲＡＮＤＡＩＤＳＰＡＴＩＥＮＴＳＩＮＤＵＣＥＤＢＹＦ３—ＡＦＲＡＣＴＩＯＮＡＴＥＤＥＸＴＲＡＣＴＯＦＡＳＴＲＡＧＡＬＵＳＭＥＭＢＲＡＮＡＣＥＵＳＣｈｕ...     

NK ACTIVITY OF LYMPHOCYTE SUBSETS AND THE EFFECTS OF LOW DOSE RADIATION

ＮＫＡＣＴＩＶＩＴＹＯＦＬＹＭＰＨＯＣＹＴＥＳＵＢＳＥＴＳＡＮＤＴＨＥＥＦＦＥＣＴＳＯＦＬＯＷＤＯＳＥＲＡＤＩＡＴＩＯＮＳｕＬｉａｏｙｕａｎ苏燎原ＴｉａｎＨａｉｌｉｎ田海林ＸｕＹｉｎｇｄｏｎｇ徐映东ＧｅｎｇＹｏｎｇｚｈｉ耿勇志Ｄｅｐａｒｔｍｅｎｔｏ...     

ANTITUMOR EFFECT OF GRANULOCYTE-MACROPHAGE COLONY-STIMULATING FACTOR(GM-CSF)-GENE ENCODED VACCINIA MELANOMA ONCOLYSATE AND ITS IMMUNOLOGICAL MECHANISMS

ＡＮＴＩＴＵＭＯＲＥＦＦＥＣＴＯＦＧＲＡＮＵＬＯＣＹＴＥＭＡＣＲＯＰＨＡＧＥＣＯＬＯＮＹＳＴＩＭＵＬＡＴＩＮＧＦＡＣＴＯＲ（ＧＭＣＳＦ）ＧＥＮＥＥＮＣＯＤＥＤＶＡＣＣＩＮＩＡＭＥＬＡＮＯＭＡＯＮＣＯＬＹＳＡＴＥＡＮＤＩＴＳＩＭＭＵＮＯＬＯＧＩ...     

A STUDY ON THE ROLE OF HCV INFECTION IN AETIOLOGY OF PRIMARY LIVER CANCER AND IT＇S INTERACTION WITH HbsAg CARRYING

张振权，周桂英，黄天壬，刘革，何振芳，吴继周，黄昭东，徐庆芬，余家华，刘洁敏ＡＳＴＵＤＹＯＮＴＨＥＲＯＬＥＯＦＨＣＶＩＮＦＥＣＴＩＯＮＩＮＡＥＴＩＯＬＯＧＹＯＦＰＲＩＭＡＲＹＬＩＶＥＲＣＡＮＣＥＲＡＮＤＩＴ＇ＳＩＮＴＥＲＡＣＴＩＯＮＷＩＴＨＨＢｓＡｇ...     

THE BLOCKING EFFECTS OF GLYCYRRHIZE URALENSIS AND CHELIDONIUM MAJUS ON MUTAGENESIS INDUCED BY AFLATOXIN B1

ＴＨＥＢＬＯＣＫＩＮＧＥＦＦＥＣＴＳＯＦＧＬＹＣＹＲＲＨＩＺＥＵＲＡＬＥＮＳＩＳＡＮＤＣＨＥＬＩＤＯＮＩＵＭＭＡＪＵＳＯＮＭＵＴＡＧＥＮＥＳＩＳＩＮＤＵＣＥＤＢＹＡＦＬＡＴＯＸＩＮＢ１ＳｈｉＧｕｉｚｎｉ；史桂芝；ＪｉＸｉｎｈｕａ；纪新华；ＬｉａｎｇＹ...     

检测人端粒酶活性的端粒酶TRAP—ELISA法的建立

目的为改进端粒重复序列扩增法（ＴＲＡＰ）存在定量困难、应用同位素及每次检测标本数受限等缺点,研究建立及评价端粒酶ＴＲＡＰＥＬＩＳＡ法。方法端粒酶ＴＲＡＰＥＬＩＳＡ法是将ＴＲＡＰ与ＰＣＲＥＬＩＳＡ系统结合。与常规ＴＲＡＰ法相比较,应用端粒酶ＴＲＡＰＥＬＩＳＡ法检测端粒酶阳性的２９３细胞和阴性对照标本（加热或ＲＮａｓｅ处理和正常人内皮细胞）。结果２９３细胞端粒酶阳性,对１０,１０２,１０３及１０４个细胞检测均为阳性,所测到的吸光度值（Ａ,曾称光密度ＯＤ）依赖于被检２９３细胞数。ＲＮａｓｅ或加热处理标本和正常人内皮细胞均阴性。该方法可在当日观察结果,不需放射性同位素。结论端粒酶ＴＲＡＰＥＬＩＳＡ是一种非放射性同位素、快速及可定量的人端粒酶活性检测方法。     

PCR-ELISA检测端粒酶活性的方法及其在人体肿瘤中的应用

目的：介绍ＰＣＲ－ＥＬＩＳＡ端粒酶活性测定方法。并以示同组织来源肿瘤端粒酶活性检测结果进行分析。方法：采用ＰＣＲ－ＥＬＩＳＡ端粒酶活性检测方法对２９９例孙同组织来瘤端粒酶活性进行检测。结果：本组结果显示ＰＣＲ－ＥＬＩＳＡ端粒酶性测定在敏感性与划性方面与国外报道的同位素方法结果一致。在多种人类恶性肿瘤组织中可检出端粒酶活性，而与各种肿瘤对应的正常组织及良性病变中则多为阴性，结论：本组结果提示ＰＣＲ＝     

Positive telomerase activity in the majority of bile duct carcinoma

Background. Studies of human tumors and human tumor cell lines indicate that telomerase activity may play a critical role in the tumor cell growth by sustaining cellular immortality. Telomerase activity has been detected in different percentages in various carcinomas, but the incidence of positive telomerase activity in bile duct carcinomas and surrounding normal bile duct tissues in its relation with malignancy grades of tumors, depth of invasion, lymphatic and vascular invasion, and lymph node metastases has not been studied. Methods. Telomerase activity was assayed in surgically resected specimens of seven human bile duct carcinomas and seven adjacent nonneoplastic tissues using the PCR-based Oncor TRAP (a telomeric repeat amplification protocol)-eze telomerase detection kit. The correlation between the results of telomerase activity and clinicopathological data was examined. Results. The telomerase activity was detected in six of seven (86%) bile duct carcinoma cases with only one negative case in our series, whereas no telomerase activity was detected in nonneoplastic adjacent bile duct tissues. Although the number of cases in our study was small, telomerase activity was regarded as independent of tumor grade, depth of invasion, lymphatic and intravascular invasion, or lymph node metastasis. Conclusions. These results indicate that increased telomerase activity is a common phenomenon in the majority of bile duct carcinomas, and that it is negative in nonneoplastic bile duct tissues. Received: June 29, 1998 / Accepted: June 16, 1999     

Precancerous hepatic nodules had significant levels of telomerase activity determined by sensitive quantitation using a hybridization protection assay

BACKGROUND: Telomeric repeat amplification protocol using internal telomerase assay standard (ITAS) (conventional TRAP) has detected telomerase activity in various malignant tumors. With conventional TRAP, it is difficult to differentiate quantitatively low levels of telomerase activity between well-differentiated hepatocellular carcinomas (HCCs) and dysplastic nodules because of quantitative limitation. To apply a telomerase assay for differential diagnosis, we used a hybridization protection assay combined with TRAP (TRAP/HPA). This combination had better sensitivity and wider linearity than conventional TRAP. METHODS: TRAP/HPA was applied for quantitative measurement of telomerase activity in various hepatic tissues. Telomerase activity was evaluated in 10 precancerous hepatic nodules, 17 well-differentiated HCCs, 19 moderately differentiated HCCs, 5 poorly differentiated HCCs, 22 nontumorous chronic hepatic disease samples, and 2 normal liver tissues. RESULTS: Telomerase activity in HCCs tended to increase according to the malignant transformation. The average relative telomerase activity in 0.6 microg protein, which was expressed as cell equivalent activity of MKN-1, a gastric carcinoma cell line, was 8.5 in precancerous hepatic nodules, 87 in well-differentiated HCCs, 265 in moderately differentiated HCCs, 447 in poorly differentiated HCCs, and 0.4 in nontumorous hepatic tissues, including chronic liver diseases. CONCLUSIONS: TRAP/HPA was sensitive enough to distinguish the telomerase activity in precancerous hepatic nodules from that in other lesions. Telomerase activity in precancerous hepatic nodules was higher than that in nontumorous hepatic tissues. However, the activity in precancerous hepatic nodules was lower than that in well-differentiated HCCs, although statistically not significant. The authors suggest that precancerous hepatic nodules with telomerase activity above the diagnostic cutoff level (twice the highest activity in nontumorous hepatic tissues, or the 2 cell equivalent activity of MKN-1) should be treated as malignancy.     

胃癌细胞中端粒酶活性的表达研究

Objective To study the relationship between telomerase activity and biological behavior in human gastric cancer cells and appraise the clinical significance of detecting telomerase activity. Methods The telomerase activity in 47 gastric cancer tissue samples, their matched normal tissues, 7 gastric ulcer and 2 gastric cancer cell lines was detected using a PCR-based non-radioisotopic telomeric repeat amplification protocol (TRAP) assay. Results None of the 47 samples from normal gastric tissues expressed telomerase activity. The 41 of 47 cases of gastric cancer presented telomerase activity with an 87.2% positive rate (P<0.001). 2/2 gastric cancer cell lines and 0/7 gastric ulcer line were also positive for telomerase activity. The activity of telomerase was associated with the pathological differentiation of gastric cancer. Conclusion Telomerase activity may be related to the biological behavior of gastric cancer and can help in assessing the malignant potential of gastric cancer. Telomeras activity will be a good diagnostic marker for the detection of gastric cancer.     

卵巢癌患者外周血癌细胞端粒酶活性检测的建立

目的　通过检测外周血中卵巢癌细胞的端粒酶活性 ,了解其血循环转移情况及其诊疗价值。方法　用改进的银染 -TRAP(端粒重复序列扩增 )法检测 3 3例卵巢癌患者术前及术后接受化疗后的外周血端粒酶活性 ,并以 10例卵巢良病变患者外周血作为对照。结果　 3 3例卵巢癌患者术前外周血端粒酶活性强阳性 8例 ,弱阳性 12例 ,术后接受化疗后仅 6例弱阳性 ;10例卵巢良病变患者外周血 1例端粒酶弱阳性 ,其余全部阴性。结论　卵巢癌患者外周血端粒酶活性检测在卵巢癌的治疗、预后的评估、随访等方面具有重要的临床意义。     

尼美舒利抑制胃癌细胞蛋白激酶B活性的研究

目的 观察选择性环氧化酶-2(COX-2)抑制剂尼美舒利对胃癌细胞株SGL-7901增殖、端粒酶活性和蛋白激酶(PKB)的影响,以探讨其抗肿瘤作用机制。方法 尼美舒利作用胃癌细胞株SGC7901不同时间后,采用噻唑蓝(MTT)比色法和PCR-ELISA半定量法检测细胞的生存率和端粒酶活性,PKB活性的检测采用非放射性蛋白激酶活性分析法。结果 尼美舒利抑制SGC7901细胞的生长呈时间,剂量依赖性,同时它也显著抑制SGC7901细胞的端粒酶和PKB活性,且端粒酶活性的降低与PKB活性的抑制有关。结论 选择性COX-2抑制剂能抑制胃癌细胞株的端粒酶活性,其作用机制可能与阻碍PKB的活性有关,这可能是选择性COX-2抑制剂抗肿瘤的又一新的机制。     

Changes of telomerase and telomere lengths in paired normal and cancer tissues of breast.

To attain the immortal phenotype, cancer cells must overcome the mitotic clock. Telomerase activity has been identified to be activated in malignant tumors including breast cancer. Telomerase activity was evaluated in 71 breast cancer tissues and paired normal tissues with the TRAP (telomerase repeat amplification protocol) assay. Telomerase activity was calculated and translated into arbitrary units by computer-assisted densitometry with the control of telomerase activity in the 293 control cell line. In 59 paired breast tissues with telomerase activity, terminal restriction fragment (TRF) lengths were measured using Southern blotting. Relative inhibition (RI), the ratio of inhibited telomerase activity in each tumor tissue compared to that of the 293 control cell line after pre-treatment with 150 microg/ml of RNAse A, was measured. Sixty-three of 71 cancer tissues showed telomerase activity (88.7%) with 75.3+/-17.9 units in densitometry, while no telomerase activity was detected in their paired normal tissues. Telomerase activity was correlated to node metastasis (p=0.02) and stage (p=0.005), but not to tumor size or the hormonal receptor status. TRF lengths were 11. 0+/-4.7 kb in 59 tumor tissues and 11.7+/-2.2 kb in paired normal tissues. TRF lengths did not correlate to any of the clinical parameters. However changes of TRF lengths in tumor tissues compared to those of normal tissues correlated to telomerase activity. RI in the tumor tissues was proportional to telomerase activity without RNAse A pre-treatment. In breast cancer, telomerase activity was specific to tumor tissues and increased with tumor progression. Telomerase activity and changes in TRF lengths can be used as guidelines in detecting candidates for the telomerase inhibitor.     

银染—TRAP法检测胸腹水脱落细胞端粒酶活性的研究

目的:探讨检测胸腹水脱落细胞端粒酶活性对于鉴别良恶性肿瘤的临床意义.方法:用Kim法处理48例胸腹水细胞后,利用改进的银染—TRAP(端粒重复序列扩增)法测其端粒酶活性.结果:24例临床及细胞涂片检查证实恶性胸腹水细胞端粒酶活性全部阳性;12例临床证实恶性而细胞检查未找到癌细胞的胸腹水细胞端粒酶活性阳性7例,阴性5例;12例良性胸腹水细胞端粒酶活性全部阴性.结论:端粒酶的激活与恶性胸腹水的发生发展密切相关,并有可能成为一种鉴别良恶性胸腹水快速、灵敏的临床诊断指标.