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1.
目的:探讨p16基因甲基化在急性淋巴细胞白血病发生机制中的作用。方法:采用限制性内切酶酶切结合多聚酶链反应(PCR)方法检测82例急性淋巴细胞白血病患者白血病细胞p16基因部分启动子和外显子1 CpG岛甲基化的情况,同时应用免疫组织化学染色法检测p16蛋白的表达。结果:31例急性淋巴细胞白血病患者存在p16基因的甲基化;1例p16基因纯合缺失;39名患者p16蛋白表达阴性;p16蛋白阴性表达患者的初次化疗完全缓解率和平均生存时间低于p16蛋白阳性表达者。结论:p16基因甲基化在急性淋巴细胞白血病的发生机制中有一定的作用,p16蛋白可能是评估急性淋巴细胞白血病预后的一个指标。  相似文献   

2.
非小细胞肺癌的早期诊断——CT与p53、p16、DNA对比研究   总被引:4,自引:1,他引:3  
目的研究非小细胞肺癌(NSCLC)的CT征象与p53、p16基因蛋白异常表达及癌细胞核DNA含量之间的关系.方法应用免疫组化SABC法对52例经手术病理证实的NSCLC石蜡包埋标本,检测p53、p16基因蛋白表达;在此基础上,应用流式细胞术(FCM)测定了其中39例细胞核DNA含量并与相应的CT征象对照,分析P53、p16基因蛋白表达及DNA含量(DNA指数,DI)与CT表现之间的内在联系.结果①正常肺组织、癌旁肺组织和肺癌组织中,p53基因蛋白阳性表达率逐渐增高,p16基因蛋白阳性表达率逐渐降低.随着肿瘤分化程度的降低,p53基因蛋白阳性表达率逐渐增高,p16基因蛋白阳性表达率逐渐降低(P<0.05).TNM分期中,I、Ⅱ期NSCLCp53基因蛋白阳性表达率低于Ⅲ期和Ⅳ期;而p16蛋白阳性表达率明显高于Ⅲ期和Ⅳ期(P<0.05).②NSCLC的DI值明显高于癌旁肺组织和正常肺组织;NSCLC的细胞分化程度越差,TNM分期越高,异倍体率(AT%)越高,SPF值也越大.③CT显示NSCLC最大直径>3cm及有淋巴结肿大组p53基因蛋白阳性表达率、p16基因蛋白阴性表达及DI值、SPF值均高于直径≤3cm组及无淋巴结肿大组;肿块轮廓出现深分叶征、棘状突起征,边缘出现短毛刺征组p53基因蛋白阳性表达率高,p16基因蛋白阳性表达率低,同时具有较高的DI.结论CT征象与p53、p16、DNA等分子生物学指标对比观察,有助于提高肺癌的早期诊断水平,指导临床制定合理的综合治疗方案.  相似文献   

3.
目的:探讨p16、p15蛋白在急性淋巴细胞白血病(ALL)发病中的意义。方法:对23例ALL细胞进行间接免疫荧光染色,用流式细胞仪检测细胞的荧光强度,间接反映p16、p15蛋白水平。结果:23例ALL患儿p16蛋白阴性10例,p15蛋白阴性8例,p16、p15蛋白均阴性6例。3例T-ALL中p16、p15蛋白皆阴性2例,13例Non T-ALL中,p16蛋白阴性6例,p15蛋白阴性5例。高白细胞组的p16、p15蛋白表达阳性率低于非高白细胞组,差异有显著意义(P<0.05),HR-ALL组p16、p15蛋白阳性表达低于SR-ALL组,差异有显著意义(P<0.05)。结论:p16、p15蛋白参与了部分急性淋巴细胞白血病的发病,p15、p15蛋白阴性的患者可能预后不良。  相似文献   

4.
目的 探讨成人急性淋巴细胞白血病(ALL)原代细胞Livin基因的表达及临床意义.方法 采用RT-PCR检测52例成人急性淋巴细胞白血病患者Livin基因表达与否及相对表达水平,以12名健康人为正常对照.结果 LivinmRNA在初治ALL患者中的阳性表达率明显高于正常对照组(P<0.05);治疗缓解后表达率明显下降(P<0.05);复发后其表达率又升高.在初治成人ALL患者中,Livin mRNA表达阳性的患者完全缓解率低于表达阴性的患者(P<0.05).结论 Livin基因的表达可能和成人ALL的发病、复发相关;Livin基因阳性表达的患者完全缓解率低,预后不良;Livin基因检测可能作为成人急性淋巴细胞白血病的发病、复发及预后判断的指标之一.  相似文献   

5.
应用人乳头瘤病毒(HPV)核酸分子斑点杂交法、流式细胞技术和细胞免疫荧光法,检测宫颈癌DNA倍体、HPV、ras p21和p53蛋白表达,并对其进行综合研究.结果显示,宫颈癌组DNA指数平均值明显高于正常组,且与肿瘤细胞分化有关;癌变组DNA异倍体率与肿瘤分化程度关系密切;在17例HPV16/18型阳性病例中,均有ras P21和/或P53蛋白阳性表达.说明宫颈癌变是多因素综合作用的结果,HPV16/18、ras p21和p53蛋白表达具有协同作用.  相似文献   

6.
目的 探讨儿童急性白血病(AL)细胞多药耐药(MDR)的产生机制中,P糖蛋白(Pgp)的表达和作用.方法 利用流式细胞术方法分析白血病细胞Pgp的表达,进一步应用多药耐药功能实验:细胞内柔红霉素蓄积实验(IDA)和罗丹明123排出实验(RhE)等研究其作用.结果 对22例初诊未治的儿童AL病例进行白血病细胞膜Pgp分析,其中急性淋巴细胞白血病(ALL)患儿组平均表达率(中位数1.37%)略小于急性非淋巴细胞白血病(ANLL)患儿组平均表达率(中位数3.2%),其差异有显著性(P<0.05);对AL患儿作白血病细胞IDA和RhE实验:其中ALL患儿组的平均荧光强度比值(MIR)水平均低于ANLL患儿组MIR水平,其差异无显著性(P>0.05);进一步研究发现AL患儿白血病细胞的Pgp表达水平与上述两种MDR功能实验MIR值之间均无统计学意义上的相关性.结论 初诊未治的儿童AL患者中,ALL患儿组白血病细胞膜Pgp平均表达量低于ANLL患儿组平均表达强度;ALL患儿组MIR水平亦低于ANLL患儿组MIR水平,儿童ANLL细胞对化疗药物尤其是柔红霉素容易产生耐药,这可能是导致ANLL患儿诱导化疗缓解率和长期生存率明显低于ALL患儿原因之一.  相似文献   

7.
PCNA表达和DNA倍体检测在膀胱癌中的意义   总被引:1,自引:0,他引:1  
目的探讨PCNA表达和DNA倍体在膀胱移行细胞癌中的临床意义及相关性。方法分别应用免疫组化(SP)法和流式细胞术对60例膀胱移行细胞癌组织及10例正常膀胱组织进行PCNA蛋白检测和DNA倍体分析。结果(1)膀胱移行细胞癌中PCNA的阳性表达率和DNA异倍体率均明显高于正常膀胱组织(P<0.01);(2)随着膀胱移行细胞癌病理分级、临床分期的增高,PCNA阳性表达率和DNA异倍体率均明显升高(P<0.05);(3)在膀胱移行细胞癌中,PCNA阳性表达率和DNA异倍体率呈正相关(P<0.01)。结论PCNA阳性表达率和DNA异倍体率与膀胱癌的发生、发展及预后密切相关。  相似文献   

8.
目的探讨Survivin表达和DNA倍体分析在膀胱移行细胞癌中的临床意义及相关性。方法分别应用免疫组化(SP)法和流式细胞术对60例膀胱移行细胞癌组织及10例正常膀胱组织进行Survivin蛋白检测和DNA倍体分析。结果(1)膀胱移行细胞癌中Survivin的阳性表达率和DNA异倍体率均明显高于正常膀胱组织(P<0.01);(2)随着膀胱移行细胞癌病理分级、临床分期的增高,Survivin阳性表达率和DNA异倍体率均明显升高(P<0.05或P<0.01);(3)在膀胱移行细胞癌中,Survivin阳性表达率和DNA异倍体率呈正相关(P<0.01)。结论Survivin阳性表达率和DNA异倍体率与膀胱癌的发生、发展及预后密切相关。  相似文献   

9.
PCNA和P16的表达与急性白血病的关系   总被引:1,自引:0,他引:1  
目的:探讨 PCNA 与 P16 与急性白血病的关系。方法:采用免疫组化方法检测 PCNA,P16在急性白血病中的表达,来反应细胞增殖与抑制关系。结果:患者在治疗前与治疗缓解后其 PCNA,P16的表达有显著性差异(P<0.05)。未缓解组与部分缓解组的 P16在急性淋巴细胞性白血病(ALL)中无差异(P>0.05),而在急性髓细胞性白血病(AML)中,P16表达有显著差异(P<0.05)。PCNA 在 ALL 和 AML 的未缓解组与部分缓解组的表达无差异性(P>0.05)。结论:P16在肿瘤细胞中存在不同程度的缺失,与白血病的发生,发展有一定的联系,PCNA 与 P16互补作为判断急性白血病的预后指标。  相似文献   

10.
目的 探讨急性白血病(AL)P53蛋白表达水平及其与化疗效果的关系.方法 选取AL患者38例(初治组30例,难治复发组8例)、缓解组患者21例、骨髓象正常的非白血病患者16例(对照组);AL各组又分为急性髓系白血病(AML)和急性淋巴细胞白血病(ALL).使用链霉菌抗生物素蛋白-过氧化物酶连结法(SP)对各组骨髓细胞中的P53蛋白表达状况进行检测.结果 初治组与难治复发组的P53蛋白表达率均明显高于缓解组(均P< 0.05),而缓解组P53蛋白表达水平与对照组差异无统计学意义(P>0.05).各组AML与ALL患者间P53蛋白表达状况差异无统计学意义@>0.05).结论 P53蛋白的过度表达参与了AL的发病,P53水平检测可预测AL患者的化疗效果及预后.  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

13.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

20.
ANTI-PROLIFERATION EFFECT OF ORIDONIN ON HL-60 CELLS AND ITS MECHANISM   总被引:4,自引:0,他引:4  
Objcetive To investigate the anti-proliferation effect of oridonin on leukemic HL-60 cells and its mechanism. Methods HL-60 cells in vitro in culture medium were given different concentrations of oridonin. The inhibitory rate of cells were measured by microculture tetrazolium (MTT) assay, cell apoptotic rate was detected by flow cytometry (FCM), morphology of cell apoptosis was observed by hoechst 33258 fluorescence staining, and the activity of telomerase was detected using telomere repeat amplification protocol (TRAP) PCR-ELISA before and after apoptosis occurred. Results Oridonin could decrease telomerase activity, inhibit growth of HL-60 cells, and cause apoptosis significantly. The suppression was both in time- and dose-dependent manner. Marked morphological changes of cell apoptosis including condensation of chromatin and nuclear fragmentation were observed clearly by hoechst 33258 fluorescence staining especially after cells were treated 48-60 hours by oridonin. Conclusions Oridonin has apparent anti-proliferation and apoptotic effects on HL-60 cells in vitro, decreasing telomerase activity of HL-60 cells may be one of its most important mechanisms. These results will provide strong laboratory evidence of oridonin for clinical treatment of acute leukemia.  相似文献   

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