脑膜瘤端粒酶的活性在判断复发和恶变中的价值

【目的】探讨端粒酶作为脑膜瘤标志物 ,在肿瘤良恶性鉴别、恶性程度评估以及预后预测等方面的意义。【方法】利用TRAP ELISA方法定量检测 6 1例 (份 )肿瘤标本端粒酶的活性 (以ΔA =A4 50 -A690 表示 ) ,结合肿瘤的分类和患者的临床资料 ,分析端粒酶活性作为肿瘤良恶性及判断预后的标记物的可行性。另取正常脑组织标本 2 0例作为对照。【结果】 30例脑膜瘤中 ,2 9例脑膜瘤均未测到端粒酶活性 ;1例端粒酶阳性 (阳性率 3 3%) ,ΔA =0 2 37;全组ΔA平均值 =0 0 49。 15例恶性脑膜瘤中 14例呈端粒酶阳性 (93%) ,ΔA =1 2 37～ 2 5 16 ;1例端粒酶阴性 ,ΔA =0 0 76 ,全组ΔA平均值 =1 6 30。 16例复发性脑膜瘤端粒酶均阳性 (10 0 %) ,ΔA =1 0 34～ 1 4 78,平均 1 2 5 5。脑膜瘤和复发性脑膜瘤、脑膜瘤和恶性脑膜瘤的端粒酶的阳性率和酶活性表达强度方面差异明显 (P分别为 <0 0 0 1、<0 0 1和 <0 0 0 0 5、<0 0 1)。 2 0例正常脑组织中未检测到端粒酶活性。【结论】端粒酶活性的激活在恶性脑膜瘤和复发性脑膜瘤中是较常见的现象。端粒酶作为肿瘤标志物 ,在脑膜瘤的良恶性鉴别、恶性程度评估、预后预测等方面具有重要的意义。     

反义端粒酶RNA抑制肝癌细胞生长的机制

目的：观察反义端粒酶RNA对SMMC－7721肝癌细胞系的作用,探讨抗端粒端治疗在原发性肝癌治疗中的意义。方法：采用脂质体介导的方式将反义端粒酶RNA真核表达载体pBBS212/hTP转入SMMC7721细胞中,经潮霉素筛选,克隆细胞株扩增鉴定后,采用TRAP－PCR－ELISA,FCM及电镜检测反义端粒酶RNA对转染细胞端粒酶活性和细胞凋亡的影响;同时进行裸鼠荷瘤生长实验观察。结果：TRAP－PCR－ELISA法检测细胞端粒酶活性的结果为：实验组吸光度值为0．980,对照组吸光度值为2．861;FCM检测细胞凋亡结果为：实验组13．8％,对照组未见有凋亡峰形成,电镜观察发现转染细胞表现出典型的凋亡细胞形态。裸鼠移植瘤生长实验发现,转染细胞生长明显受到抑制作用,说明反义端粒酶RNA显抑制SMMC7721细胞的端粒酶活性,并且对其有显的促凋亡作用。结论：反义端粒酶RNA能有效地抑制肝癌细胞端粒酶活性,同时显促进癌细胞凋亡。     

脑膜瘤端粒酶的活性在判断复发和恶变中的价值

目的：探讨端粒酶作为脑膜瘤标志物，在肿瘤良恶性鉴别，恶性程度评估以及预后预测等方面的意义。方法：利用TRAP－ELISA定量检测61例（份）肿瘤标本端粒酶的活性（以ΔA＝A450－A690表示），结合肿瘤的分类和患的临床资料。分析端粒酶活性作为肿瘤良恶性及判断预后的标记物的可行性。另取正常脑组织标本20例作为对照。结果：30例脑膜瘤中，29例脑膜瘤均未测到端粒酶活性，1例端粒酶阳性（阳性率3．3％），ΔA＝0．237；全组ΔA平均值＝0．049，15例恶性脑膜瘤中14例呈端粒酶阳性（93％），ΔA＝1．237－2．516；1例端粒酶阴性，ΔA＝0．076，全组ΔA平均值＝1．630。16例复发性脑膜瘤端粒酶均阳性（100％），ΔA＝1．034－1．478，平均1．255，脑膜瘤和复发性脑膜瘤，脑膜瘤和恶性脑膜瘤的端粒酶的阳性率和酶活性表达强度方面差异明显（P分别为＜0．001，＜0．01和＜0．0005，＜0．01），20例正常脑组织中未检测到端粒酶活性。结论：端粒酶活性的激活在恶性脑膜瘤和复发性脑膜瘤中是较常见的现象。端粒酶作为肿瘤标志物，在脑膜瘤的良恶性鉴别，恶性程度评估，预后预测等方面具有重要的意义。     

乳腺癌组织的端粒酶活性表达的研究

目的：研究乳腺癌组织端粒酶活性的表达,探讨端粒酶活性在恶性肿瘤诊断和病情进展中的意义。方法：采用改良TRAP－银染法检测30例乳腺癌端粒酶活性并以30例癌旁组织作对照。结果：30例乳腺癌组织（86．67％）表达阳性,其中18例术前针吸活检组织（83．33％）表达阳性,而癌旁组织（13％）表达阳性,两组间比较有统计学差异（P＜0．001）。结论：端粒酶活性见于绝大多数乳腺癌,可能在乳腺癌的发生发展中起重要作用,其检测可用于乳腺癌的诊断。     

高血压病患者外周血单个核细胞端粒酶活性变化意义的探讨

目的 :探讨高血压患者外周血单个核细胞的端粒酶活性变化 ,并对其可能的机制进行探讨 ,以期进一步了解端粒酶在高血压发病中的作用。方法 :对高血压病患者外周血单个核细胞进行提取 ,用PCR -ELISA测定端粒酶活性 ,与健康对照组进行比较 ,并对端粒酶活性的影响因素进行分析。通过对正常人外周血淋巴细胞在体外不同条件下培养 ,并检测其端粒酶活性 ,在体外探讨端粒酶上调的机制。结果 :高血压病组外周血单个核细胞端粒酶阳性率为 4 5 %,对照组为 18.5 %,A值分别为 0 .39± 0 .32和 0 .17± 0 .15 ,二者差异有显著性。单因素分析表明 ,血压值、治疗与否、危险度分级等不是影响端粒酶的主要因素 ,而高血压的有无是影响端粒酶的主要因素。Logistic回归表明端粒酶活性与高血压病程负相关。细胞培养结果表明 ,PHA及CD3单抗可使培养细胞端粒酶活性上调 ,且与细胞计数正相关。结论 :(1)高血压病患者外周血单个核细胞端粒酶活性上调 ,高血压病的有无 ,是影响端粒酶活性的关键因素 ,端粒酶活性与高血压病程长短负相关 ;(2 )淋巴细胞在体外可通过增殖 (有丝分裂原刺激 )及免疫活化途径使端粒酶活性激活。 (3)端粒酶是理想的细胞增殖的分子水平标志     

乳腺癌端粒酶活性表达研究

目的　探讨端粒酶活性水平同乳腺癌临床病理指标的关系及其作为化疗疗效评价指标的意义。方法　用半定量TRAP 银染法测定 5 3例乳腺癌、10例纤维腺瘤及 6例癌旁组织标本的相对端粒酶活性。结果　乳腺癌组织端粒酶活性表达明显高于乳腺良性病变 (P <0 .0 1) ;术前未经治疗的原发性乳腺癌中 ,端粒酶活性表达与TNM分期、局部淋巴结状态、雌激素受体及孕激素受体表达有关 ;术前化疗组端粒酶活性水平较未化疗组低。结论　端粒酶活性水平可反映肿瘤的侵袭性 ,并可作为乳腺癌的预后判断指标及化疗疗效的评价指标。     

端粒酶活性与胃癌关系的临床病理研究

目的　探讨端粒酶与胃癌的发生及其临床病理特征的关系。方法　采用端粒酶重复序列扩增的PCR技术(PCR TRAP)检测了 6 4例胃癌组织及其癌旁组织的端粒酶活性。结果　胃癌组织中端粒酶活性检出率明显高于癌旁组织 (χ2 =81 78,P <0 0 1)。低分化及未分化胃癌端粒酶活性阳性率显著高于高度分化及中度分化胃癌 (χ2 =7 96 ,P <0 0 1)。结论　端粒酶活性增高可能是导致胃癌发生的重要因素 ,端粒酶活性检测可作为胃癌诊断和预后判断的辅助指标     

喉癌病人外周血淋巴细胞端粒酶活性的检测及临床意义

①目的　探讨外周血淋巴细胞端粒酶活性与喉癌的相关性。②方法　采用聚合酶链反应基础上端粒重复序列扩增法(PCR TRAP)检测喉癌病人、声带息肉病人及正常人外周血淋巴细胞中端粒酶活性。③结果喉癌病人43例,有37例端粒酶阳性,阳性率86.05%;21例声带息肉病人中有 3 例阳性,阳性率 14.29%;20 例正常人中有2例阳性,阳性率10.00%。端粒酶活性在喉癌病人与声带息肉病人、喉癌病人与正常人之间的差异有显著性(uc=3.65、5.45,P<0.01);声带息肉病人与正常人之间差异无显著性(uc=0.44,P>0.05)。④结论　端粒酶表达在喉癌的发病机制中可能起着重要作用,喉癌病人外周血淋巴细胞端粒酶活性的测定,对喉癌的早期诊断、治疗等都有重要的临床意义。     

端粒酶活性检测方法研究

端粒酶是已知的恶性肿瘤特异性最强的生物标志物 ,端粒酶活性在肿瘤的早期诊断以及预后评估中均有潜在价值 [1～ 3 ]。端粒酶活性也表达于生殖细胞、造血干细胞等非肿瘤细胞中 [4] ,因而单凭端粒酶活性的有无难以区分正常细胞与肿瘤细胞 ,故必须建立端粒酶活性的定量分析方法。本研究在文献 [5 ]基础上建立了一种相对简便的端粒酶活性定量分析方法——端粒酶延伸产物液体闪烁计数法 ,并将其与银染端粒重复序列扩增法 (TRAP)进行了比较。1　材料和方法1.1　细胞株和组织样本　乳腺癌细胞株 MCF- 7为中国科学院上海细胞生物学研究所引进。…     

人不同乳腺癌细胞株端粒酶活性与放射敏感性的关系

目的 :通过检测人不同乳腺瘤细胞株的端粒酶活性及其 2Gy的存活分数 (SF2 )的相关性 ,探讨端粒酶活性是否能成为检测肿瘤细胞放射敏感性的一个指标。方法 :8株人不同肿瘤细胞株 (Hep 2、Hela、U2 5 1、ZR 75 30、MCF 7、MDA MB 4 35S、T 4 7 D、F5 39 15 90 )在指数增长期留取细胞 ,然后分别用TRAP ELISA检测其端粒酶活性 ,克隆形成实验检测其放射敏感性参数SF2 。结果 :8株人乳腺癌细胞株端粒酶活性各不相同 (P <0 .0 1) ,其中ZR 75 \|30端粒酶活性检测呈阴性 ,余 7株细胞端粒酶活性检测呈阳性 ,SF2 亦不相同 (P <0 .0 1) ,但端粒酶活性与SF2 之间无明显的直线相关关系 (P =0 .341)。结论 :8株人不同肿瘤细胞株的端粒酶活性及其放射敏感性各不相同 ,但其端粒酶活性不能成为检测其放射敏感性的指标。     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

Value of D-Dimers in patients with acute aortic dissection

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.     

Research of combined liver-kidney transplantation model in rats

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.     

Development on Adjustable Calibration Marker for Shock Wave Focus

Shock wave lithotripsy （SWL） is a treatment of choice for upper urinary stones. However, this procedure is inappropriate for obese patients because the focus is often unable to reach the target owing to the limited focal distance in shock wave source. Although treating such patients in a blast path may increase the application length of shock wave source, it＇s difficult to find this path on the lithotripter monitor. For this reason, we invented an adjustable calibration marker in order to set an effective focus in the shock wave hath.     

Study on the TCM Pathogenesis of Angiopathic Complications of Type II Diabetes

Excess production of reactive oxygen species(ROS)of mitochondrion mediated by hyperglycemia is the common pathogenesis of angiopathic complications of diabetes.TCM holds that the damp from the dysfunction of spleen.kidney and liver is the causative factor of complications of diabetes.This is similar to the mechanism of Ros resulting in angiopathic complications of diabetes.When the angiopathic complications of type II diabetes mellitus(T2DM)are difierentiated as caused by turbid damp in TCM can be explained as ROS.Since the obstruction of pathogenic damp in channels and collaterals is said to be the main pathogenesis,the treating principle should be dissolving the damp to remove the obstruction.     

Leptin, Ghrelin and TNF-α before and after Hypo-caloric Traditional Chinese Diet and Auricular Acupuncture

INTRODUCTION Obesity is a complex emergent problem, which can be possibly solved not only by the diet but also by the life style and promotion of a constant physical exercise. 1, 2 No doubt careful attentions must be given to the nutritional condition of obese people, the dietary habits, the somatic build (i.e. distribution of fat mass) and the organic functions linked to formation of the fat mass. All the parameters should be constantly monitored before, during and after a diet treatment. 3, 4, 5     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

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.     

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

Luo Lingjie's Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.