2种不同类型的核酸探针对压电基因传感器阵列检测特异性的影响

目的探讨用PNA作为探针与普通的DNA探针相比对压电传感器基因杂交的优越性.方法用生物素-亲和素法分别将PNA、DNA两种探针固定在基因传感器的金膜表面,分别与完全匹配、1个碱基错配、2个碱基错配的互补靶序列进行杂交,观察2种不同的探针与靶序列反应所引起的频率变化及所用的时间.结果相对于DNA探针,PNA探针识别碱基错配的能力明显高,且杂交时间更短.结论 PNA与靶序列DNA结合有高度的特异性,选用PNA作探针,可提高压电基因传感器检测的特异性.     

链延伸反应提高压电基因传感器的灵敏度的实验研究

目的　利用链延伸反应的原理延长引物链以提高压电基因传感器表面的质量负载 ,从而提高传感器的灵敏度。方法　基因传感器阵列表面分别固定上金黄色葡萄球菌mecA及femA两种探针片段 ,待杂交上相应的靶序列片段后 ,加入Klenow酶 ,室温下 (2 0℃左右 )进行链延伸反应 8h。结果　 50nmol L单链mecA在杂交反应及链延伸反应的过程中 ,频率的下降值分别为 (99.2± 8.5)Hz、(1 92 .9± 1 3 .3 )Hz。而femA则分别下降了 (1 42 .4± 1 1 .2 )Hz、(2 2 2 .6± 1 6.6)Hz。mecA、femA在链延伸反应前的检测灵敏度为 0 .5nmol L ,但经链延伸反应后检测灵敏度提高到了 0 .0 5nmol L。结论　链延伸反应有效地提高了压电基因传感器的灵敏度 ,可用于微量DNA的检测、核酸同源性分析等方面     

探针浓度对肽核酸石英谐振式基因传感器阵列杂交效应的影响

目的探索不同肽核酸(PNA)探针浓度对PNA石英谐振式基因传感器阵列杂交效应的影响.方法石英谐振式基因传感器阵列表面分别固定上0.005、0.01、0.05、0.1、0.5、1.0、1.5、2.0、4.0μM的bis-PNA探针后,观察其固定以及与相应的HBV靶序列杂交时频率的下降值及反应所需的时间.结果探针固定引起的频率变化值先升而后趋于平缓,而与HBV靶序列杂交所引起的频率变化值却是先升后降,以1.5μM探针浓度为分界线;杂交平衡时间上各组间未见明显的变化趋势.结论 1.5μM bis-PNA探针固定浓度最为适宜.     

碱基匹配程度对压电传感器基因杂交效应的影响

探讨碱基匹配程度对压电传感器基因杂交效应的影响。方法 :在压电传感器阵列上固定 2 0碱基的巯基DNA探针 ,而后分别与有 0 ,1,2 ,3个碱基不匹配的靶序列进行杂交 ,计算机采集分析传感器频率数据 ,比较各匹配程度下杂交达到平衡所需时间 ,杂交前后频率差 ,并计算杂交动力学参数。结果 :随碱基不匹配数增加 ,杂交时间有缩短趋势 ,杂交前后频率差值逐步减小 ,结合常数明显下降 ,解离常数增大 ,使平衡常数显著减小。结论 :在石英晶体传感器阵列上 ,基因杂交效率随碱基不匹配数量增加而减小。     

靶DNA长度对压电传感器基因杂交效应的影响

目的：探讨靶DNA长度对压电传感器基因杂交效应的影响，方法：在压电传感器阵列上固定20碱基的巯基DNA序列作为探针后分别与不同长度的含互补片段的靶序列进行杂交，计算机采集并分析传感器频率数据，比较各靶DNA长度下杂交达到平衡所需时间，杂交前后频率差，并计算杂交动力学参数。结果：随靶DNA长度增加，杂交时间有延长趋势。在靶DNA长度为20－108个碱基时，其频率变化值与碱基数呈线性关系。而225，379，654个碱基时的频率变化反应则明显降低，结合常数变化不明显，而解离常数呈增大趋势变化，使平衡常数逐渐减少，结论：在威武央晶体传感器阵列上，频率变化值随靶序列长度增长而增大但反应效率不一样。     

不同温度对压电传感器基因杂交效应的影响

目的：探讨温度对压电传感器基因杂交效应的影响。方法：在压电传感器阵列上固定20碱基的疏基DNA探针,而后分别在15℃、20℃、25℃、30℃下与同长度的互补靶序列进行杂交,计算机采集并分析传感器频率数据,比较各温度下杂交达到平衡所需时间,杂交前后频率差,并计算杂交动力学参数。结果：随温度增加,杂交时间有缩短趋势,杂交前后的频率差值逐渐减小。结合常数变化不明显,解离常数增大,使平衡常数显著增大。结论：在石英晶体传感器阵列上,基因杂交量随温度增高而减小。     

探针浓度对压电传感器基因杂交效应的影响

目的 探讨探针浓度对压电传感器基因杂交效应的影响。方法 9种浓度的探针与同一浓度的靶序列在压电传感器阵列上进行杂交,计算机采集并分析传感器频率数据,比较各探针浓度下固定前后频率差,杂交达到平衡所需时间,杂交前后频率差,同时,根据较低浓度数据得出的杂交动力学参数。计算各浓度下的频率变化理论值。结果 随探针浓度增加,固定引起的频率变化值逐渐增加,杂交时间有缩短趋势,杂交前后的频率差值在探针浓度较低（1nmol/L-0.5μmol/L)时逐渐增大,而探;针浓度较高（1.0-3.5μmol/L)时反而减小,高浓度时杂交前后频率变化理论值与实际值存在明显差异。结论 在石英晶体传感器阵列上,基因杂交效率随探针浓度增加而增大,但探针浓度过高反而抑制杂交,其原因可能主要在于探针之间的空间构象关系和静电排斥。     

肽核酸生物传感器检测系统构建时靶序列农度的影响及线性范围的确定

目的探索肽核酸生物传感器检测系统构建时靶序列浓度值对杂交效应的影响,以及靶序列浓度线性范围的确定.方法石英谐振式生物传感器阵列表面先固定上1.5μM的bis-PNA探针,观察终浓度为1pg/L至100μg/L的HBV DNA与探针进行杂交所引起的频率变化及反应所需时间.并对频率下降值与靶序列浓度做线性回归,确定其线性范围.结果靶序列浓度为1 pg/L时,传感器未能检测出任何频率的改变.随着浓度从10 pg/L增加到100μg/L,杂交反应引起的频率下降值呈先增加后趋于缓和的趋势,以10μg/L为分界线,而杂交平衡时间并没有显现出一定的变化趋势.在10pg/L到10μg/L的浓度范围内,浓度与频率下降值的线性回归方程为lgC=-2.745 5 0.069 1×△F,相关系数r=0.992 3.结论随着靶序列浓度的升高,杂交反应引起的频率下降值呈典型饱和曲线趋势,靶序列浓度的线性检测范围为:10 pg/L ～ 10μg/L.     

基于"单碱基延伸和酶放大系统"的SNP漏声表面波生物传感器的实验研究

目的探讨漏声表面波生物传感器检测单核苷酸多态性(single nucleotide polymorphism,SNP)的方法。方法分别在漏声表面波生物传感器反应体系加入2条仅存在一个碱基不同(A/G)的靶序列,与固定的探针杂交。利用酶生物信号放大系统,结合单碱基延伸技术,观察其杂交信号的改变。结果靶位点为完全匹配的A时,相位下降(6.47°±0.42°);而靶位点为错配的G时,相位下降仅为(0.77°±0.25°),两者差异有统计学意义(P<0.01)。结论成功建立了漏声表面波生物传感器检测SNP的新方法。     

离子浓度对肽核酸压电基因传感器杂交效应的影响

目的　探索不同离子浓度的PBS缓冲液对肽核酸压电基因传感器阵列杂交效应的影响。方法　压电基因传感器阵列表面固定上 1 .5 μM的bis PNA探针后 ,分别观察在 1 0、2 0、5 0、1 0 0mM的PBS缓冲液环境中与相应的靶序列杂交 ,记录频率的下降值及反应所需的时间。结果　钠离子浓度从 1 0mM增加至 2 0mM时 ,杂交导致的频率下降值及平衡时间均增加 (P <0 .0 5 ) ;从 2 0mM增加至 5 0、1 0 0mM时 ,杂交导致的频率下降值各组间无显著差异 ,但杂交平衡时间却呈倍数增长。结论　离子浓度极大地影响了杂交反应的时间 ,低盐离子浓度更有利于提高bis PNA和dsDNA的杂交速率 ,高盐离子浓度则会大大降低bis PNA的结合速率。     

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…     

Dr.Zhang Ren''''s Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.     

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.     

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.     

猪肺磷脂注射液联合经鼻持续气道正压通气对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性的影响

目的 探讨猪肺磷脂注射液联合经鼻持续气道正压通气(NCPAP)对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性(CK-MB)的影响.方法 选取呼吸衰竭早产儿80例,分为观察组和对照组各40例.对照组采用NCPAP给氧治疗,观察组给予NCPAP给氧联合猪肺磷脂气管内给药.观察两组患儿治疗前及治疗12h、24 h后PaO2、PaCO2、血氧饱和度(SaO2)、pH的变化情况,检测治疗前及治疗5d后血清CK-MB水平;评估两组患儿的临床治疗效果.结果 两组患儿PaO2、PaCO2、SaO2、pH比较,差异均有统计学意义(P＜0.05),其中观察组治疗后的PaO2、SaO2、pH均高于对照组,PaCO2则低于对照组.两组的PaO2、SaO2、pH均随观察时间延长而升高(P＜0.05),PaCO2均随观察时间的延长而降低(P＜0.05).观察组治疗有效率为87.5％,显著高于对照组的70.0％ (P ＜0.05).治疗5d后两组患儿血清CK-MB水平均较前降低(P＜0.05),且观察组明显低于对照组(P＜0.05).结论 猪肺磷脂注射液气管内给药联合NCPAP可以显著降低呼吸衰竭早产儿CK-MB的含量,提高治疗有效率,起到很好的呼吸循环支持作用.     

Survey and practice of reporting quality of randomized controlled clinical trials on traditional Chinese medicine

Evidence obtained from randomized controlled trials （RCTs） has been generally accepted as the gold standard in the evaluation of clinical effectiveness. Readers need to understand the trial design, implementation, results, analysis and interpretation, so as to fully Jnderstand the results of RCTs. Thus, the investigators of RCTs have to report these items in a complete, accurate and clear manner. Since 1998, we have conducted several evaluations on the reporting quality of RCTs published in Chinese journals on traditional Chinese medicine （TCM） and results have shown that there is an urgent need for higher quality RCTs on TCM.     

TCM Treatment of Ankylosing Spondylitis by Tonifying the Kidney and Strengthening the Governor Vessel

Ankylosing spondylitis is a chronic and progressive disorder with inflammation mainly involving the central axis joints. It mainly affects the cervical spine and the lumbosacral area, with the pathogenesis closely related to the kidney and the Governor Vessel (GV). TCM holds that the syndrome is deficiency in origin and excess in superficiality, which is due to insufficiency of the kidney, deficiency of GV, and blocking of the channels with the invasion of exogenous evil, leading to poor circulation of qi and blood and malnutrition of the bones, muscles and joints. The TCM method of tonifying the kidney and strengthening GV to regulate circulation of qi and blood and check the arthralgia pain should be adopted, with the Kidney-Tonifying and GV Strengthening Decoction (益肾强督汤) prescribed.     

IMPROVING P-gp EXPRESSION IN HUMAN MONONUCLEAR CELLS IN VITRO TRANSFECTED BY MULTIDRUG RESISTANCE-1 mRNA

CHEMOTHERAPY playsa greatrolein the treat- ment of malignanttumors,especiallyingynecolo- gicalones.But inanticancerchemotherapy,leuko-cytopeniaisfrequentlytheprimarydose-limitingsideeffect factor.Moreover,cancersarefrequentlychemoresistantbe-causeof overexpressionof P-glycoprotein(P-gp), which isencodedby multidrugresistancegene (MDR1 ) and detectableinup to50% ofhuman cancersand renderscellsresistancetoanticancerdrugs.The safetyand potentialtherapeuticbenefitof mdr1 gene transferredto h…