Effect of remifentanil on toll-like receptor 4, NF-κB and IL-6 in rabbit myocardial ischemia/reperfusion model

Objective:To investigate whether remifentanil induced cardioprotecting effect is associated with expression of toll-like receptor 4 (TLR4).nuclear factor κB (NF-κB) and serum interleukin -6 (IL-6).Meth...     

NF-κB调控可卡因行为敏化的BDNF机制简

目的獉獉：探讨脑源性神经营养因子（BDNF）是否作为核因子NF-κB的靶基因,参与NF-κB对可卡因行为敏化的影响。方法獉獉：建立NF-κB抑制剂DDTC作用下的小鼠可卡因诱导行为敏化模型,用Real-time PCR检测海马、前额叶皮质、伏隔核中Bdnf的表达。结果獉獉：可卡因可诱导伏隔核和海马（而非前额叶皮质）中Bdnf的上调,而在DDTC的作用下,总Bdnf及BdnfⅣ在伏隔核、海马和前额叶皮质中分别表达下调、不变和上调。结论獉獉：在不同的脑区NF-κB作用的机制可能不同,在伏隔核中,Bdnf可能作为NF-κB的靶基因参与可卡因行为敏化的形成。     

牙龈卟啉单胞菌唾液酸酶基因突变株黏附与侵入KB细胞能力研究

目的    研究PG0352基因缺失对牙龈卟啉单胞菌（P. gingivalis）黏附和侵入人口腔上皮癌KB细胞能力的影响。方法    本研究于2014年7—12月在中国医科大学口腔医学院中心实验室完成。实验组：将P. gingivalis W83菌株（W83菌株组）和PG0352基因突变株（PG0352突变株组）分别以100∶1的比例与KB细胞共培养2 h,制备P. gingivalis与KB细胞的黏附和侵入模型;对照组：单纯KB细胞培养。透射电镜观察KB细胞表面及细胞内是否有P. gingivalis存在;用PBS清除未黏附于KB细胞的细菌,裂解细胞后涂板检测P. gingivalis黏附和侵入KB细胞情况,抗生素保护法检测P. gingivalis侵入KB细胞情况。结果    透射电镜结果发现,W83菌株组和PG0352突变株组KB细胞内均有细菌侵入;通过涂板后菌落计数发现P. gingivalis W83菌株和PG0352基因突变株对KB细胞的黏附率分别为（15.559 ± 2.020）%和（9.309 ± 1.750）%,侵入率分别为（0.651 ± 0.287）%和（1.517 ± 0.233）%,两者差异均有统计学意义（均P < 0.05）。结论    P. gingivalis W83菌株和PG0352基因突变株均能够黏附和侵入KB细胞;与W83菌株相比,PG0352基因突变株黏附上皮细胞的能力较弱而侵入能力较强。     

A study on kinetic frictional properties in Begg/KB orthodontic appliances at posterior sites

In Begg and KB techniques, the kinetic frictional force generated between their characteristic orthodontic appliances at posterior sites and the orthodontic wire affects the efficiency of tooth movement. We compared the kinetic frictional force between the recent orthodontic appliances for posterior sites: the by-pass loop-KB buccal tube system (loop-KB tube system) and the conventional by-pass clamp-round buccal tube system (clamp-round tube system), and elucidated the frictional properties of the loop-KB tube system. We used 016"/018" round wires (016/018 round) and 022" × 016" ribbon wire (022 ribbon) with anchorage bend/curve applied. The results obtained were as follows:

核因子-κB表达与SIRS的关系及参附注射液干预作用的实验研究

目的:探讨NF-κB与全身炎症反应综合征(SIRS)的关系以及参附注射液的干预作用。方法:本实验设计为3组:正常对照组、脂多糖α(LPS)致伤组及参附注射液(SF)治疗组。采用静脉注射脂多糖(LPS)建立大鼠SIRS模型,并通过检测内毒素筛选成功模型。经相应处理后,各组分别检测不同时间点血液中单个核细胞核因子-κB(NF-κB)、血清肿瘤坏死因子-α(TNF-α)、白介素-6(IL-6)水平以及肺脏、肝脏组织的病理变化。结果:①LPS致伤后大鼠单个核细胞中NF-κB及TNF-α活性明显增高,2 h最明显(P0.05),其后逐渐下降;②血清IL-6浓度随着时间的推移不断升高(P0.05);③病理结果显示,LPS组肺组织出现肺泡出血、水肿,肺泡间隔弥漫性增厚、水肿和炎症细胞浸润;肝脏组织显示肝窦扩张、充血、局灶性肝细胞坏死。SF组肺脏和肝脏的上述损伤出现均明显减轻。SF组和LPS致伤组相比,可显著降低NF-κB活性、TNF-α及IL-6水平(P0.05),减轻肺脏和肝脏的病理损伤。结论:NF-κB等参与了SIRS的发生、发展,导致肺脏、肝脏损伤;参附注射液可能通过减少NF-κB的激活,减少TNF-α和IL-6的释放,减轻肺脏和肝脏的病理损伤,对SIRS起保护作用。     

Effects of Heat-Killed Levilactobacillus brevis KB290 in Combination with β-Carotene on Influenza Virus Infection in Healthy Adults: A Randomized Controlled Trial

Influenza, a seasonal acute respiratory disease caused primarily by the influenza virus A or B, manifests with severe symptoms leading to considerable morbidity and mortality and is a major concern worldwide. Therefore, effective preventive measures against it are required. The aim of this trial was to evaluate the preventive effects of heat-killed Levilactobacillus brevis KB290 (KB290) in combination with β-carotene (βC) on influenza virus infections in healthy Japanese subjects aged between 20 and 59 y throughout the winter season. We performed a randomized, double-blind, placebo-controlled, parallel-group trial from 16 December 2019 to 8 March 2020, comparing KB290 + βC beverage with placebo beverage. The primary endpoint was the incidence of influenza based on a doctor’s certificate. The incidence of influenza was not significantly different between the two groups. However, the subgroup analysis showed a significant difference between the two groups (influenza incidence: the KB290 + βC group 1.9%, and the placebo group 3.9%) in the subgroup of subjects aged ˂40 y, but not in the subgroup of subjects aged ≥40 y. The results of this trial suggest that the combination of KB290 and βC might be a possible candidate supplement for protection against the seasonal influenza virus infection in humans aged <40 y, although further clinical studies are needed to confirm the concrete preventive effect of this combination on influenza.     

白藜芦醇对KBv200细胞多药耐药逆转作用的研究

目的 探讨白藜芦醇对人口咽腔上皮癌KBv200耐药细胞株的多药耐药逆转作用及可能的逆转机制.方法 采用四甲基偶氮唑盐比色法检测KBv200耐药细胞中白藜芦醇对长春新碱、多柔比星和紫杉醇的逆转倍数,流式细胞仪检测细胞的凋亡情况,应用反转录聚合酶链反应(RT-PCR)和蛋白质印迹法(Western blot)检测每组KBv200细胞中肿瘤多药耐药相关基因1(multidrug resistance 1,MDR1)和B细胞淋巴瘤基因2(Bcl-2)mRNA和蛋白水平的表达.结果 白藜芦醇对化疗药物具有协同增效作用,显著逆转KBv200耐药性.200 umol/L白藜芦醇对长春新碱、紫杉醇和多柔比星(阿霉素)的逆转倍数达到77.1、61.3和5.9.白藜芦醇能显著降低Bcl-2、MDR1mRNA和蛋白的表达,100 umol/L、200 umol/L白藜芦醇处理组与未加白藜芦醇组的MDR1、Bcl-2mRNA表达差异均有统计学意义(t值分别为2.98、3.51和3.12、4.56,P值均<0.05).结论 白藜芦醇对口咽腔上皮癌耐药细胞具有耐药逆转作用,该逆转作用可能是通过降低耐药基因表达、促进细胞凋亡实现的.     

维甲酸对小鼠T细胞增殖及骨破坏因子RANKL表达的研究

目的 探讨全反式维甲酸对体外培养的小鼠T淋巴细胞的增殖及核因子-КB受体活化因子配体(RANKL)表达的调节作用及相关机制。方法 体外分离Aa感染的BALB/C小鼠颈T淋巴细胞,分别加入浓度为0、1×10-8、1×10-7、1×10-6、1×10-5mol/L的全反式维甲酸,培养3 d后,取100μl上清保存在-70℃冰箱中,以备sRANKL及IL-10等细胞因子的测定;另加入100μl含有3Hthymidine(0.5μCi/孔)RPMI培养液继续培养18 h,进行T细胞3H增殖率测定。结果 维甲酸处理组与非处理组相比,T细胞3H增殖率下降;上清中RANKL的表达水平下降,IL-10的表达水平增强(P<0.05),二者具有负相关性(r=-0.774,P=0.001),且呈剂量依赖性。结论 维甲酸可通过上调IL-10的表达并下调T细胞上的RANKL的表达水平,抑制T细胞的免疫功能,且呈剂量依赖性。     

Neurogenetics and Clinical Evidence for the Putative Activation of the Brain Reward Circuitry by a Neuroadaptagen: Proposing an Addiction Candidate Gene Panel Map

Abstract

This document presents evidence supporting the role of the KB220/KB220Z neuroadaptagens consisting of amino-acid neurotransmitter precursors and enkephalinase-catecholamine–methyl-transferase (COMT) inhibition therapy called Neuroadaptagen Amino Acid Therapy (NAAT) in brain reward function. It is becoming increasingly clear that this novel formulation is the first neuroadaptagen known to activate the brain reward circuitry. Ongoing research repeatedly confirms the numerous clinical effects that ultimately result in significant benefits for victims having genetic antecedents for all addictive, compulsive and impulsive behaviors. These behaviors are correctly classified under the rubric of “Reward Deficiency Syndrome” (RDS). We are proposing a novel addiction candidate gene map. We present preliminary findings in the United States using qEGG and in China using Functional Magnetic Resonance Imaging (fMRI) regarding the effects of oral NAAT on the activation of brain reward circuitry in victims of SUD. In unpublished data utilizing an fMRI 2X2 design at resting state, NAAT in comparison to placebo shows activation of the caudate brain region and potentially a smoothing out of heroin-induced putamen (a site for emotionality) abnormal connectivity. Although awaiting final analysis, if confirmed by ongoing studies in China coupled with published qEEG results in America, showing an increase in alpha and low beta, NAAT may be shown to impact treatment outcomes.     

黄癸素对人口腔上皮样癌KB细胞株及化学诱导性仓鼠颊癌作用的研究

目的研究黄癸素对体外培养人口腔上皮样癌KB细胞及化学诱导仓鼠的口腔癌变抑制作用。方法 MTT法检测黄癸素对KB肿瘤细胞株的影响,计算24,48,72h的IC50。采用8周龄仓鼠,建立二甲基苯丙蒽(DMBA)诱发的颊囊癌模型,用黄癸素进行干预。结果黄癸素对KB细胞有抑制作用,24,48,72h的IC50分别为(12.74±0.13),(4.56±0.22),(2.88±0.11)mg/L;对KB细胞生长呈浓度、时间依赖性抑制作用。DMBA诱导的仓鼠在36,54,72mg/kg的黄癸素作用下,颊黏膜不典型增生与癌变的发生率有不同程度的降低,其中54,72mg/kg剂量组的病变总发生率分别为66.6%和53.3%,比模型组(86.6%)分别降低了20.0%和33.3%(P<0.01)。结论黄癸素能显著的抑制KB细胞生长,对化学物诱导的仓鼠口腔癌变也有抑制作用。