胃癌7号染色体长臂的杂合性缺失分析

目的:检测胃癌患者7号染色体长臂微卫星位点的杂合性缺失(loss of heterozygosity,LOH),以初步确定7号染色体长臂上与胃癌相关基因连锁最密切的微卫星多态位点及LOH的临床意义.方法:在70例原发性胃癌中应用多重PCR技术扩增覆盖整个7号染色体长臂的9个微卫星位点(平均遗传距离为10cm),聚丙烯酰胺凝胶电泳分离PCR产物,用GeneScan、Genotyper软件进行分析.结果:9个微卫星位点的LOH均可发生于原发性胃癌,总的LOH频率为34.3%(24/70),其中D7S486和D7S798位点的LOH频率较高,分别为24.0%(12/50)和19.2%(5/26);总的LOH频率随临床分期而显著增高(P=0.046),D7S486位点的LOH频率在淋巴结转移者显著高于无淋巴结转移者(P=0.015).结论:在7号染色体长臂D7S486和D7S798位点附近,可能存在与胃癌发展相关的抑癌基因.     

18例大肠癌肝转移高强度聚焦超声治疗的临床观察

目的:研究高强度聚焦超声(HIFU)治疗大肠癌肝转移病灶的安全性和有效性.方法:18例大肠癌术后肝转移患者31个病灶行HIFU治疗,观察患者生命体征、主要脏器功能、影像学检查(CT或MRI等)、并发症和肿瘤转归的情况.结果:所有患者生命体征平稳,肝、肾功能正常,平均随访16.1个月(6～38个月),失访2例,生存13例,12、18个月生存率分别为83.3%和66.7%,中位生存期16个月;随访25个病灶中,17个肿瘤块缩小超过50%,有5例出现新的转移灶,8例出现皮肤浅Ⅱ度烧伤.结论:HIFU治疗是一种安全、有效和非侵入性治疗大肠癌肝转移病灶的手段.     

四肢骨折术后镇痛治疗的临床观察

目的通过比较不同的镇痛方案在四肢骨折治疗中的镇痛效果，探讨一种确实有效的符合四肢骨折术后无痛功能锻炼要求的镇痛模式。方法选择2003年8月1日～2003年9月15日50例四肢骨折接受手术治疗的病人，随机分为A、B两组，每组25例，A组接受系统规律的镇痛治疗方案，B组采用传统的疼痛时再给止痛药物的方法治疗，以VAS评分法评判镇痛效果。结果A组患者的VAS评分明显低于B组患者，A组患者开始接受主、被动功能锻炼明显早于B组患者，有利于促进患者术后的康复。结论系统规律的有效镇痛治疗方案，有利于患者的早期功能锻炼，降低术后并发症，促进患者的早期康复。     

Expression of hepatoma-derived growth factor is a strong prognostic predictor for patients with early-stage non-small-cell lung cancer.

PURPOSE: Hepatoma-derived growth factor (HDGF), which is unrelated to hepatocyte growth factor, can stimulate DNA synthesis and cell proliferation on entering the nucleus. We hypothesize that HDGF plays an important role in biologic behavior of early-stage non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS: Ninety-eight patients with pathologic stage I NSCLC who underwent curative surgery were studied. Immunohistochemistry was used to determine the expression level of HDGF in the tumor specimens. The intensity of the protein staining and percentage of stained tumor cells were used to determine a labeling index. Statistical analyses, all two-sided, were performed to determine the prognostic effect of HDGF expression levels on clinical parameters and outcomes. RESULTS: The mean +/- standard deviation HDGF labeling index in the 98 tumors was 185 +/- 41. Patients whose tumors had higher HDGF indexes (>/= 185) had a significantly poorer probability of overall survival at 5 years after surgery than did those with lower HDGF indexes (0.26 v 0.82; P <.0001). Similarly, the 5-year disease-specific and disease-free survival probabilities were lower in those with higher HDGF indexes (0.42 v 0.92, and 0.34 v 0.71; P <.0001 and P =.0008; respectively). Multivariate analysis indicated that HDGF level was an independent predictor of overall, disease-specific, and disease-free survivals. CONCLUSION: Overexpression of HDGF is common in early-stage NSCLC. The expression level in tumor cells is strongly correlated with poor overall, disease-specific, and disease-free survivals, suggesting HDGF may be a powerful prognostic marker for patients with early-stage NSCLC.     

人前列腺癌细胞PC-3M亚系u-PAR基因表达的分析

目的 为研究与人前列腺癌细胞(PC-3M)侵袭能力相关的靶分子。方法 采用有限稀释法分离单克隆细胞株，并应用单层细胞侵袭等实验鉴定各亚系的体外侵袭能力；借助RT-PCR和免疫组化的方法，分别在转录和翻译水平检测5株侵袭能力不同的PC-3M亚系尿激酶型纤溶酶原激活物受体(u-PAR)的表达。结果 高侵袭亚系u-PAR基因mRNA的表达和蛋白质水平均明显高于低侵袭亚系。结论 PC-3M亚系u-PAR的高表达与其较强的侵袭能力密切相关，而u-PAR可能是抑制高侵袭亚系侵袭效应的一个重要靶分子。     

A dendritic cell line genetically modified to express CTLA4-IG as a means to prolong islet allograft survival

BACKGROUND: Dendritic cells are potent antigen-presenting cells that bind allogeneic T cells. They are thus candidates for targeting immunoregulatory molecules to the alloreactive T cell compartment and suppressing the alloimmune response. METHOD: A dendritic cell line derived from the BALB/c mouse (H2d) was genetically modified to express the immunoregulatory molecule CTLA4-Ig. The ability of these dendritic cell transfectants to downregulate the alloimmune response was tested in an islet transplant model. Allogeneic C57Bl/6 (H2b) mice were rendered diabetic with streptozocin, and they received BALB/c islet (H2d) transplants. Mice were administered 25 million untransfected or CTLA4-Ig-transfected D2SC/1 cells i.v. on the day of islet transplantation and 6 days later[fnc]. RESULT: Mice treated with CTLA4-Ig-transfected D2SC/1 cells demonstrated prolonged allograft survival (mean = 20 days, median = 17 days, SD = 9.39) compared with mice treated with untransfected D2SC/1 cells (mean = 12 days, median = 11 days, SD=2.74) or untreated control mice (mean = 11 days, median = 11 days SD = 1.41). Third party allograft survival was not prolonged in mice receiving similar treatment. CONCLUSIONS: These results demonstrate that a genetically modified dendritic cell line can suppress the alloimmune response and prolong islet allograft survival in an allospecific manner. The findings also suggest that genetically modified dendritic cells may be useful in targeting alloreactive T cells and prolonging allograft survival.     

Ability of a Specific ERK Signal-Pathway Inhibitor to Reverse P-Glycoprotein- Mediated Vincristine Resistance in Colon Cancer Cell Unes

OBJECTIVE To investigate the effect of a specific inhibitor PD098059 of the extracellular-signal regulated protein kinase (ERK) pathway on the P-glycoprotein (P-gp)-mediated resistance of colon cancer cell lines SW480/VCR and CoLo205NCR.METHODS SW480NCR and CoLo205NCR cells were generated byexposuring SW480 and CoLo205 cells to vincristine (VCR) (30 ng/ml) for 72h, which resulted in a comparatively higher level of P-gp expression.Western blotting was used to analyze P-gp, MRP, LRP, GST-‘rr and TOPOIIexpression after exposuring the SW480 and CoLo205 cells to VCR (30 ng/ml)for 72 hrs. P-gp and pERK1/2 expressions was analyzed in SW480NCR andCoLo205/VCR cells treated with or without the specific inhibitor of MEK,PD098059. The MTT assay was used to determine the susceptibility ofSW480NCR and CoLo205NCR cells to VCR, treated with or withoutPD098059.I~F.SULI“S The results showed that VCR induced a comparatively higher levelof P-gp expression in the cell lines, but not that of MRP, LRP, GST-n- orTOPOII. P-gp expression levels were depressed significantly in SW480/VCR and COLO205/VCR cells by the specific inhibitor of MEK, PD098059.The IC50 (248 19.6 and 215 10.7 ng/ml) to VCR of SW480/VCR andCoLo205/VCR cells exhibited a 2.16 and 2.03-fold higher resistancecompared to the negative control group (SW480 and CoLo205 cells)(115 15.6 and 106 11.9 ng/ml), but a 1.35 and 1.21 -fold higher resistance thanthe group treated with VCR (30 ng/ml) PD098059 (184 21.8 and 177 19.4 ng/ml).CONCLUSION This study shows that the expression of P-gp can beinduced by exposuring cells to VCR, and that this induction can be reversedby inhibiting the ERK signaling pathway at the point of MEK by its specificinhibitor, PD098059. The ERK signal-transduction pathway may play a rolein modulating mdrl expression in colon cancer.     

Acupuncture treatment of 32 cases of lumbar intervertebral disc protrusion

Yaoyangguan (GV 3), Shiqizhui (Ex-B 8) and Yanglingquan (GB 34) were selected as main points and a three-part needle insertion technique was used to treat 32 cases of lumbar intervertebral disc protrusion. The curative rate was 96.9%. Deep puncture is the key to the treatment. Author: Chen Feng(1962-), male, junior consultant doctor Translator: Wang Si-you     

Clinical observation of vascular dementia treated by surrounding-acupuncture of the CT-located area

Purpose To observe the clinical effect of “Surrounding Needling Technigue through CT Location” in treating vascular dementia.Method Fifty cases of vascular dementia were randomly divided into surrounding Needling Technigue through CT location and routine acupuncture groups, 25 cases in each group, and were given surrounding Needling Technigue through CT location and routine acupuncture respectively.Results The effective rates in surrounding Needling Technigue through CT location and routine acupuncture groups were 88% and 60% respectively, and there was significant difference between the two groups,P<0.01.Conclusion Therapeutic effect of surrounding Needling Technigue through CT location in treating vascular dementia was satisfactory, and better than that of routine acupuncture. Foundation Item: Scientific Fundation of Guangdong TCM Bureau Author: Lun Xin(1964-), male, associate professor     

Acupuncture plus herbal medicine treated 30 cases of minor chorea

In the treatment of 30 cases of minor chorea by puncturing Baihui (GV 20), Sishencong (Ex-HN 1) and Fengchi (GB 20), in combination of oral administration of herbal medicine, the total effective rate is 96.7%. Author: ZHANG Shu-jun (1961-), female, lecturer Translator: HUANG Guo-qi