苯巴比妥钠治疗新生儿缺氧缺血性脑病患儿血糖的变化

新生儿缺氧缺血性脑病(HIE)是围产期窒息的严重并发症,常同时合并严重的代谢紊乱如酸中毒、高血糖、电解质紊乱等[1],高血糖可明显加重HIE病情[2].近年来,苯巴比妥钠治疗HIE已取得了良好疗效,这与其止惊、降低脑代谢率等作用有关.我院自1995年5月至1998年10月采用苯巴比妥钠治疗中、重度HIE 65例,观察血糖浓度变化及苯巴比妥钠治疗是否对血糖浓度有影响,现报道如下.     

ECLIA定量检测HBsAg及HBeAg与HBV-DNA相关分析

目的探讨电化学免疫发光法(ECLIA)定量检测HBeAg和HBsAg,并分析与DNA(HBV-DNA)含量之间的相关性,为临床提供诊断治疗依据。方法筛选乙肝病人标本500份,以荧光定量PCR法检测HBV-DNA(以HBV-DNA>500 copies/ml为阳性),按DNA含量不同分9组,同步以ECLIA检测HBeAb、HBeAg、HBsAg。结果HBeAg的含量(IU/ml)与HBV-DNA的含量(copies/ml)成正相关(r=0.99),在HBV-DNA 5×102~1×106copies/ml时,HBV-DNA的阳性率比HBeAg高(P<0.05),在HBV-DNA大于1×106copies/ml时,HBV-DNA的阳性率与HBeAg相比差异无显著性(P>0.05);HBV-DNA在500~1×106copies/ml之间,HBeAb有较高的阳性率,并随着HBV-DNA含量增加而逐渐下降。HBsAg的含量COI(cut off index)与HBV-DNA含量呈负相关(r=-0.94)。结论ECLIA的HBeAg定量检查可指示病人的传染性强弱,但尚不是最可靠的指标;HBeAg阴性、HBeAb阳性不是传染性消失的可靠指标;HBsAg的定量检测意义不大。     

Efficacy of intravenous zoledronic acid in the prevention and treatment of osteoporosis: a meta-analysis

ObjectiveTo compare the effect of zoledronic acid in treatment and prevention of osteoporosis with placebo.MethodsRandom control trials regarding zoledronic acid in treatment of osteoporosis were retrieved by selecting Medline, EMbase and Pubmed databases till April 2012. The RevMan software was used for all of the statistical analysis.ResultsA total of 9 trials were included in this meta-analysis. The pooled effect showed that zoledronic acid could increase the bone mineral density by 2.98 times compared with placebo, and reduce the rate of fracture in patients by 32%. The results should the zoledronic acid intervention had significantly less serious adverse events than controls, and the odds ratio was 0.81 (0.76–0.87). The longer term intervention, more than 12 months intervention, could gain a better prevention effect for osteoporosis (OR, 95% CI for BMD was 3.35, 2.77–3.92; for fracture was 0.67, 0.54–0.82).ConclusionsThis present study shows that zoledronic acid could be effective approach in the prevention of osteoporosis, and could increase the bone mineral density and reduce the risk of facture.     

A theoretical study based on DFT calculations on the different influence of functional groups on the C–H activation process via Pd-catalysed β-X elimination

We have performed a series of theoretical calculations for palladium-catalyzed β-X elimination reactions. The DFT calculation combined with energy decomposition analysis shows the determining factors of reactivity. Such as, the elemental composition, the structure of different functional groups and the stronger steric repulsions contribution.

The energy decomposition analysis (EDA) results show the quantitative contribution of nucleophile groups in intramolecular interactions.     

Influence of biopsy on the prognosis of nasopharyngeal carcinoma—A critical study of biopsy from the nasopharynx and cervical lymph node of 649 patients

Most of the nasopharyngeal carcinomas (NPC) are histopathologically either poorly differentiated or undifferentiated. After radiotherapy, hematogenous spread is the chief cause of failure for these patients. Biopsies taken from the nasopharynx or the enlarged neck nodes should be performed to establish diagnosis before radiotherapy. The present study was done to ascertain whether the biopsy procedure would affect the final outcome of this malignancy, and to establish certain criteria for clinicians as they endeavor to correctly diagnose and prepare the patients for treatment. Six hundred and forty-nine of 702 NPC patients treated in our hospital from March 1958 through 1972 were analyzed for this purpose and the results are as follows: For patients with fixed and partially fixed neck nodes, the interval between the first biopsy and radiotherapy, the number of times or frequency of biopsy either taken from the nasopharynx or the lymph node and the type of biopsy done on the lymph node did not influence the prognosis. For patients with or without only movable neck nodes, the interval between the first biopsy from the nasopharynx and radiotherapy influenced the final outcome. Patients who received radiotherapy within 14 days after biopsy had a five year survival of 61% ($\text{42}\text{69}$), which is better than that of the patients who started their treatment beyond the 15th day ($\text{47.5\%–}\text{58}\text{122}$). This is statistically significant (p < 0.05). The number of times or frequency of biopsy taken from the nasopharynx before radiotherapy did not influence the result of treatment. The interval, therefore, and not the frequency, is important in the biopsy from the nasopharynx. For patients with movable lymph nodes, partial excision of the node gave a poorer five year survival ($\text{22\%–}\text{2}\text{9}$) than that of patients on whom complete excision was done ($\text{50\%–}\text{9}\text{18}$). Therefore, complete excision of the node is advised for patients with movable neck node metastasis.     

补肾健脾方对去势大鼠骨骼肌Bcl-2、Caspase蛋白表达的影响

目的 探讨补肾健脾方对去势大鼠骨骼肌中Bcl-2、Caspase蛋白表达的影响.方法 48只6月龄的雌性SD大鼠随机分为空白组、模型组、中药组、西药组各12只.治疗12 w后收集左侧股骨、股直肌分别行骨矿含量(BML)、骨密度(BMD)测量,同时检测Bcl-2、Bax、Caspase-3和Caspase-9表达水平.结果 最后纳入研究的动物40只.模型组的BMD和BMC均低于空白组(P＜0.05);中药组和西药组的BMD高于模型组(P＜0.05).与对照组相比,模型组骨骼肌中Caspase-3和Caspase-9表达水平明显上升(P＜0.05).使用药物干预后,中药组能显著降低大鼠骨骼肌中Caspase-3和Caspase-9的表达水平(P＜0.05).模型组骨骼肌中Bcl-2表达水平下降,Bax表达水平上升,与空白组相比,只有Bax蛋白的表达水平有显著性差异(P＜0.05);经过药物干预后,中药组能提高骨骼肌中Bcl-2蛋白表达,降低Bax表达,与模型组比较,差异有统计学意义(P＜0.05).结论 补肾健脾方对去势大鼠有明显的治疗作用,能明显提高BMD;显著减低Caspase-3和Caspase-9含量,同时提高抗凋亡蛋白的表达水平,降低促凋亡蛋白的表达水平.     

为过继性免疫治疗培养淋巴细胞时的细胞因子作用和基因表达特征

在过继免疫性细胞培养时需要加入不同的细胞因子。本研究旨在比较不同细胞因子及EBV抗原肽联合细胞因子刺激淋巴细胞后淋巴细胞分化方向和相关的基因表达变化特征。分别用不同细胞因子及EBV抗原肽联合细胞因子刺激淋巴细胞,在培养的当天和第1、3、7、10天,用流式细胞术检测各组细胞中CD3+(总T细胞)、CD3+CD4+(辅助T细胞)、CD3+CD8+(细胞毒性T细胞)、CD3+CD8+CD45RO+(记忆型T细胞)、CD3+CD8+CD45RA+(初始型T细胞)、CD3+CD30+(Th2辅助细胞)、CD19+(B细胞)、CD56+(NK细胞)、CD4+CD25+(初始调节T细胞)、CD4+CD25+FOXP3+(精确调节T细胞)在培养前后总细胞中的百分比变化;用RT-PCR技术检测管家基因mad1、pten和辅助T细胞转录调控基因t-bet(Th1)、gata3(Th2)、细胞因子ifn-γ(Th1)、il-4(Th2)基因表达量。结果表明:EBV多肽组CTL细胞成为优势细胞,临床治疗有确切疗效;比较加入EBV多肽组和不同细胞因子培养组结果显示,EBV抗原肽可以更有效刺激CTL生成,ifn-γ基因表达量明显增加;辅...     

脑动静脉畸形血管内栓塞的影响因素及治疗进展

血管内栓塞治疗已成为治疗脑动静脉畸形(BAVM)的主要方法之一,随着微导管技术及栓塞材料不断完善,对BAVM的认识逐步提高,疗效也越来越好。本文总结了BAVM血管内栓塞的影响因素及治疗进展。