Pretreatment Controlling Nutritional Status Score and Lactate Dehydrogenase as Predictive Markers of Survival in Patients with Malignant Peritoneal Mesothelioma

Objective: To investigate the relationships between the Controlling Nutritional Status (CONUT) score and ascites fluid lactate dehydrogenase (LDH) level, and prognosis in patients with malignant peritoneal mesothelioma (MPeM).

Methods: A total of 125 patients with MPeM were selected for the study using a pathological screening method. Once the diagnosis is established, before the treatment their clinical characteristics and nutritional evaluations were recorded including CONUT score and ascites LDH level. The associations between CONUT, ascites LDH, and other clinicopathological features including body mass index, asbestos exposure, pathological type, and treatment method were analyzed. Prognostic parameters predicting overall survival (OS) were analyzed by Cox regression.

Results: High CONUT score, high ascites LDH level were positively associated with poor prognosis in patients with MPeM according to univariate analyses (P?<?0.001, P?<?0.001, respectively), and CONUT score and ascites LDH were independent predictors of a poor prognosis according to multivariate analysis. When the CONUT score is greater than 3 and the ascites LHD is greater than 474?IU/l, it indicates a poor prognosis.

Conclusions: CONUT score and ascites LDH are important factors influencing the prognosis of MPeM patients and should thus be considered in clinical applications.     

Beta 2-integrin and L-selectin are obligatory receptors in neutrophil aggregation [see comments]

We have recently found that antibodies to L-selectin, the homing receptor on neutrophils, are as effective as those to beta 2-integrin at blocking formyl peptide-stimulated aggregation. Therefore, we investigated the requirements for expression of L-selectin and beta 2- integrin on adjacent cells during aggregation. Fluorescence flow cytometry allowed characterization of aggregates on the basis of size and color, as well as antibody binding to these two adhesive molecules. Formyl peptide-stimulated aggregate formation was measured for individual populations fluorescently labeled red (LDS-751) or green (CD44-FITC), and interpopulation red-green cell conjugates. Blocking either the beta 2-integrin or L-selectin adhesive epitope with monoclonal antibody on individual cell populations resulted in an approximately 50% reduction in two-color aggregation as compared with that in unblocked samples. Shedding the L-selectin on a cell population by preincubation with complexes of lipopolysaccharide and its plasma membrane binding protein also decreased aggregation to a control population by approximately 50%. We examined the aggregation of neutrophils from patients genetically deficient in beta 2-integrin and clinically leukocyte adhesion deficient (LAD). LAD adhesion to normal neutrophils was dependent on the expression of L-selectin on LAD cells and beta 2-integrin on normal cells. Thus, the minimum requirement for adhesion between two mixed populations of neutrophils was that one population expressed the beta 2-integrin and the other expressed the L- selectin adhesive epitope.     

日本血吸虫SjC21.7核酸疫苗诱导小鼠保护性免疫作用的研究

目的　研究日本血吸虫中国大陆株 2 1.7k Da膜蛋白分子 (Sj C2 1.7)核酸疫苗对 BAL B/ c小鼠的免疫保护性作用。　方法　采用 PCR方法扩增出特异性 Sj C2 1.7基因的开放阅读框序列 ,在其起始密码子处引入 Kozark序列。将目的基因片段亚克隆到真核表达质粒 pc DNA3.1中 ,构建重组真核表达质粒 Sj C2 1.7- pc DNA3.1。 4 8只 BAL B/ c小鼠分为对照组、实验组和加强组。对照组小鼠的股四头肌注射接种 pc DNA3.1,实验组同法注射重组质粒 Sj C2 1.7- pc D-NA3.1,加强组除注射重组质粒 Sj C2 1.7- pc DNA3.1外 ,同时注射重组质粒 P35 - pc DNA3.1及 P4 0 - pc DNA。每隔 2 wk免疫 1次 ,共免疫 3次。第 3次免疫后第 30天 ,每只鼠感染 4 5± 1条尾蚴 ,4 5 d后剖杀计数各组小鼠成虫数及肝卵数。通过 EL ISA和免疫组化分析观察小鼠免疫学特征的变化。　结果　免疫组化分析显示 ,实验组小鼠股四头肌局部组织有特异性抗原蛋白表达。EL ISA分析表明 ,免疫后实验组和加强组有部分小鼠出现特异性 Ig G抗体。与对照组比较 ,实验组减虫率及减卵率分别为 2 9.9%及 13.8% ,加强组分别为 31.9%及 2 8.0 %。加强组减卵率显著高于实验组(P<0 .0 5 )。　结论　 Sj C2 1.7核酸疫苗能诱导 BAL B/ c小鼠产生一定水平的抗血吸虫感染     

CO2浓度升高对不同水分养分条件下小麦幼苗生长的影响--测试文章

设置了5个氮素浓度梯度（N₀、N₁、N₂、N₃、N₄）、3个PEG（P₀、P₁、P₂）浓度梯度以及2个CO₂浓度（370±50 μmol·mol^-1; 700±50 μmol·mol^-1）水平的盆栽试验,探究了小麦幼苗生长、物质积累与分配以及植株水分条件的变化规律。结果表明：小麦幼苗株高、地上部干重、根干重、生物量以及叶水势的最大值以及高浓度CO₂的最大刺激作用均出现在处理N₁P₀; 而根长和根冠比的最大值分别出现在处理N₀P₀和N₁P₂,高浓度CO₂的最大刺激值也分别出现在处理N₀P₀和N₁P₂; 适宜养分条件下,高浓度CO₂能够最大限度地促进小麦幼苗的生长,同时高浓度CO₂通过提高小麦幼苗叶水势,一定程度上缓解了低浓度PEG胁迫的不利影响。因此,未来CO₂浓度升高将对水肥条件好的小麦产生促进作用,可缓解轻度水分不足的不利影响,而对严重干旱胁迫下小麦的生长作用不明显。     

结直肠手术后认知功能障碍患者血清细胞因子的差异表达

目的应用高通量细胞因子抗体芯片筛查结直肠手术后认知功能障碍(POCD)患者血清差异表达的细胞因子并进行验证。方法 80例择期行结直肠手术患者,根据认知功能测试量表判定POCD,于手术前1 d、术后4 h取血分离血清,高通量细胞因子芯片筛查120个血清细胞因子,差异5倍以上因子经ELISA验证。结果 77例患者完成认知量表和血样采集,术后第7天,19例发生POCD。POCD患者在年龄、麻醉风险ASA分级、糖尿病发病率、受教育程度与非POCD患者有明显差异。高通量筛查出的5倍以上差异表达血清细胞因子9个,经ELISA验证结果显示:POCD患者术前白细胞介素17(IL-17)、Fas、巨噬细胞炎性蛋白3α(MIP-3α)水平明显高于非POCD患者,瘦素(leptin)明显低于非POCD患者;术后4 h血清IL-6、IL-11、IL-17、甲基受体趋化蛋白3(MCP3)、骨髓造血祖细胞抑制因子(MPIF-1)、MIP-3α明显高于非POCD患者,脑源性神经营养因子(BDNF)明显低于非POCD患者。POCD患者术后4 h的IL-6、IL-17、MCP3、MPIF-1明显高于术前;非POCD患者术后4 h IL-6、IL-17明显高于术前,Fas、BDNF明显低于术前。结论结直肠手术POCD的发生伴随的血清细胞因子IL-6、IL-11、IL-17、Fas、MPIF-1、MIP-3α、MCP3、leptin、BDNF的差异表达。     

脑络通与绞股蓝总皂甙对动脉粥样硬化性疾病的疗效比较

脑络通是用来治疗动脉粥样硬化性疾病的中药复方制剂,具有滋肾养肝、消痰祛瘀作用。为明确其治疗效果,周脑络通与绞股蓝总甙对103例动脉粥样硬化性疾病患者进行两盲临床对比观察,时间5个月以上。采用美国ATL公司彩色超声多谱勒血流声象系统在用药前后探测患者两侧颈动脉粥样硬化斑块及内中膜厚度,检测患者血脂、超氧化物歧化酶、脂过氧化物和血液流变学指标,部分病人检测血小板聚集率和心功能,并检测患者的血、尿常规和肝、肾功能,观察患者临床症状。结果发现脑络通组57块颈动脉粥样硬化斑块中15.8%(9/57)的斑块消除,47.4%(27/57)的斑块减轻,29.8%(17/57)的斑块不发展,总有效率为93%(53/57);绞股蓝组分别为0%,2.8%(1/36)和47.2%(17/36),总有效率为50%(18/36).脑络通组对斑块的消除、减轻、总有效率及斑块载面积减少方面皆明显优于绞股蓝组(p<0.01或0.05)。脑络通可使增厚的内中膜减薄。在降低血总胆固醇、甘油三酯、低密度脂蛋白、升高血超氧化物歧化酶活性,降低脂过氧化物,降低全血低切粘度、纤维蛋白原、红细胞压积、血小板最大聚集率等方面皆优于绞股蓝组。提示脑络通在调血脂、抗氧化、抗血栓和改善血液流变学等方面均有作用.在临床症状和患者心脏舒缩功能的改善方面亦优于绞股蓝组.本药长期服用对患者血、尿常规,肝、肾功能无异常影响,未见明显毒副反应.说明脑络通治疗动脉粥样硬化性疾病方面疗效优于绞股蓝总皂甙,脑络通可能阻止患者动脉粥样硬化病变的发展,甚至可能使动脉粥样硬化斑块消除。     

NR2B-Tyr phosphorylation regulates synaptic plasticity in central sensitization in a chronic migraine rat model

Background

Although the mechanism of chronic migraine (CM) is unclear, it might be related to central sensitization and neuronal persistent hyperexcitability. The tyrosine phosphorylation of NR2B (NR2B-pTyr) reportedly contributes to the development of central sensitization and persistent pain in the spinal cord. Central sensitization is thought to be associated with an increase in synaptic efficiency, but the mechanism through which NR2B-pTyr regulates synaptic participation in CM-related central sensitization is unknown. In this study, we aim to investigate the role of NR2B-pTyr in regulating synaptic plasticity in CM-related central sensitization.

Methods

Male Sprague-Dawley rats were subjected to seven inflammatory soup (IS) injections to model recurrent trigeminovascular or dural nociceptor activation, which is assumed to occur in patients with CM. We used the von Frey test to detect changes in mechanical withdrawal thresholds, and western blotting and immunofluorescence staining assays were performed to detect the expression of NR2B-pTyr in the trigeminal nucleus caudalis (TNC). NR2B-pTyr was blocked with the Src family kinase inhibitor 4-amino-5-(4-chlorophenyl)-7-(t-butyl)-pyrazolo [3,4-d] pyrimidine (PP2) and the protein tyrosine kinase inhibitor genistein to detected the changes in calcitonin gene-related peptide (CGRP), substance P (SP), and the synaptic proteins postsynaptic density 95 (PSD95), synaptophysin (Syp), synaptotagmin1 (Syt-1). The synaptic ultrastructures were observed by transmission electron microscopy (TEM), and the dendritic architecture of TNC neurons was observed by Golgi-Cox staining.

Results

Statistical analyses revealed that repeated infusions of IS induced mechanical allodynia and significantly increased the expression of NR2B Tyr-1472 phosphorylation (pNR2B-Y1472) and NR2B Tyr-1252 phosphorylation (pNR2B-Y1252) in the TNC. Furthermore, the inhibition of NR2B-pTyr by PP2 and genistein relieved allodynia and reduced the expression of CGRP, SP, PSD95, Syp and Syt-1 and synaptic transmission.

Conclusions

These data indicate that NR2B-pTyr might regulate synaptic plasticity in central sensitization in a CM rat model. The inhibition of NR2B tyrosine phosphorylation has a protective effect on threshold dysfunction and migraine attacks through the regulation of synaptic plasticity in central sensitization.

     

Effect of template removal using plasma treatment on the structure and catalytic performance of MCM-22

To investigate the effect of template removal methods on the structure, properties and catalytic performance of the MCM-22 zeolite, dielectric-barrier discharge (DBD) plasma treatment and thermal calcination have been comparatively studied for the removal of hexamethyleneimine (HMI) from the two-dimensional layered precursor of MCM-22 (MCM-22(P)). The materials were characterized using FT-IR, TG, XRD, N₂ adsorption at low temperature, NH₃-TPD, and ²⁷Al and ²⁹Si MAS NMR. The results revealed that the seven-membered heterocyclic compound HMI can be effectively removed from the MCM-22 zeolite, and the condensation of silanol groups on the neighboring surface of MWW nanosheets can be induced by DBD treatment. Compared with calcination, DBD treatment could preserve the structure well and decrease the formation of extra-framework aluminum. Consequently, the concentration of acidic sites over MCM-22 treated by DBD (MCM-22(DBD)) is higher than that over calcined MCM-22 (MCM-22(C)). Moreover, MCM-22(DBD) possesses a certain amount of external surface area derived from the intercrystal pores due to the inhibiting effect of the condensation of the silanol groups on the external surface of the MCM-22 crystals. The activity and product selectivity of the Fischer–Tropsch (FT) synthesis was investigated over cobalt supported on the obtained MCM-22 zeolites. Compared with Co/MCM-22(C), Co/MCM-22(DBD) shows a higher catalytic activity in the FT synthesis reaction. Moreover, Co/MCM-22(DBD) can effectively decrease CH₄ selectivity and increase C₅–C₂₀ liquid fuel selectivity.

Template removal from MCM-22 using dielectric-barrier discharge (DBD) plasma could decrease the formation of extra-framework aluminum (EFAl) and increase the concentration of the acidic sites and external surface area of MCM-22.     

ANXA2敲除的A549细胞系的构建及其对H1N1和H9N2流感病毒复制的影响北大核心CSCD

目的旨在利用CRISPR/Cas9基因编辑技术构建ANXA2敲除的A549细胞,并探索ANXA2敲除对流感病毒复制的影响。方法本研究设计了3对靶向ANXA2基因外显子的特异性sgRNAs,分别将sgRNAs构建到LentiCRISPRv2载体上获得重组质粒,与辅助质粒共转染293T细胞包装成慢病毒后感染A549细胞,通过嘌呤霉素压力及有限稀释法筛选ANXA2基因敲除的单克隆细胞株,用靶基因测序及Western-blot验证ANXA2的敲除效果,并通过CCK-8试验比较ANXA2敲除细胞和野生型A549细胞的细胞活力。再分别用人流感病毒WSN(H1N1)和禽流感病毒SD98(H9N2)感染ANXA2敲除和野生型A549细胞,经TCID_(50)检测ANXA2敲除对流感病毒复制的影响。结果成功获得了ANXA2敲除的A549细胞系,且与野生型A549细胞相比,细胞活力无显著差异;ANXA2敲除后WSN(H1N1)和SD98(H9N2)流感病毒的病毒滴度均升高,其中ANXA2对SD98(H9N2)流感病毒的影响要大于WSN(H1N1)。结论本研究利用CRISPR/Cas9基因编辑技术构建了ANXA2敲除的A549细胞,并发现ANXA2敲除促进了流感病毒的复制,本研究为流感病毒复制和致病机制的研究奠定了基础。