益生菌联合肠内营养对急性胰腺炎患者肠道菌群及外周血miR-155的影响

目的 探讨益生菌联合肠内营养对急性胰腺炎患者肠道菌群及外周血miR-155的影响。 方法 选取2016年6月至2018年12月河北医科大学第二医院消化内科收治的92例急性胰腺炎患者作为研究对象，根据随机数字表法分为观察组（n=46）和对照组（n=46），对照组在常规治疗基础上给予肠内营养治疗，观察组在对照组基础上给予双歧杆菌乳杆菌三联活菌片，观察两组患者治疗前后肠道菌群、炎性介质及血清miR-155变化，比较两组患者治疗后胃肠道功能恢复情况。结果 治疗后，观察组双歧杆菌、乳酸杆菌增加数量，肠球菌、大肠埃希菌减少数量，血清CRP、IL-6、IL-17、TNF-α、miR-155降低水平均显著高于对照组（P<0.05）；观察组患者胃肠生活质量量表（GIQLI）评分高于对照组，腹胀消失时间、腹痛消失时间、肠鸣音恢复时间、血清淀粉酶恢复正常时间均少于对照组（P<0.05）。结论 益生菌联合肠内营养治疗急性胰腺炎可调节肠道菌群平衡，降低血清miR-155水平，缓解炎性反应，促进肠道功能恢复。     

直线加速器日质控数据分析及过程评估

目的 应用统计过程控制方法对加速器日质控(QC)数据进行分析,并对使用晨检仪的QC过程进行评估。方法 加速器、晨检仪校准后分别收集由技师、物理师摆位的100组、30组QC数据,设备第2次校准后再次收集技师摆位的QC数据100组,分析两次校准后技师摆位数据(各100组)的归一化信噪比的变化规律。使用由技师和物理师摆位的QC数据(各30组)绘制控制图,比较中心线位置和上下控制线范围的不同。计算由技师、物理师摆位的3个组日QC的过程能力指数。结果 两次校准的技师摆位数据归一化信噪比均为前6周变化较大,6~8周后趋于稳定,8周后逐渐变小。物理师摆位的QC数据在输出量一致性方面,上下控制线范围更窄;在平坦度、对称性方面,中心线更接近目标值0。对输出量一致性、平坦度方面,3个组日QC的过程能力指数均满足≥1要求;对称性Transverse方向均不满足。结论 应采用30~40个数据点绘制加速器日QC过程的控制图。QC过程应由相对固定且较少的QC人员完成,检测项目也应设置更适合的容差。     

基于网络药理学探讨国医大师张磊运脾汤治疗高脂血症的分子机制＊

目的 基于网络药理学探讨运脾汤治疗高脂血症的分子作用机制。方法 通过TCMSP、Pharm Mapper、GeneCards、DisGeNET等多个数据库检索，预测并收集运脾汤的有效化学成分和对应的靶蛋白以及高脂血症的相关疾病基因，筛选关键靶点，对关键靶点及相关有效化学成分做分子对接验证，利用DAVID数据库的富集分析功能，得到运脾汤的有效化学成分干预高脂血症的过程中涉及的相关功能和通路，并构建“中药材-有效化学成分-靶点-通路”综合网络。结果 运脾汤干预高脂血症的核心成分为木犀草素、槲皮素、山奈酚、柚皮素等；核心靶点PPARG、NOS3、EGFR、APOB和ESR1，分子对接验证，大部分靶点与化合物有结合活性较好；DAVID富集分析，运脾汤可能通过细胞内外刺激、脂多糖反应和调节凋亡等生物过程和HIF-1信号通路、AGE-RAGE信号通路、胰岛素信号通路、TNF信号通路等途径干预高脂血症。结论 本研究初步预测了运脾汤干预高脂血症的多成分、多靶点、多通路的作用机制，为进一步实验研究提供理论依据。     

Apatinib Monotherapy or Combination Therapy for Non-Small Cell Lung Cancer Patients With Brain Metastases

Apatinib, an oral small molecular receptor tyrosine kinase inhibitor (TKI) developed first in China, exerts antiangiogenic and antineoplastic function through selectively binding and inhibiting vascular endothelial growth factor receptor 2 (VEGFR-2). In this study, we aimed to explore the efficacy and safety profile of apatinib monotherapy, or combined with chemotherapy or endothelial growth factor receptor (EGFR)-TKI in heavily pretreated non-small cell lung cancer (NSCLC) patients with brain metastases. We performed a retrospective analysis for relapsed NSCLC patients with brain metastases from our institute, who received apatinib (250 mg or 500 mg p.o. qd) monotherapy, or combination with EGFR-TKI or chemotherapy as second or more line systemic therapy until disease progression or unacceptable toxicity occurred. The objective response rate (ORR), disease control rate (DCR), median progression-free survival (mPFS), median overall survival (mOS), and safety were analyzed. A total of 26 eligible patients were included: 24 patients diagnosed with adenocarcinoma, 2 with squamous carcinoma, and 14 patients harboring EGFR sensitizing mutations. The mPFS and mOS were 4.93 (range, 0.27−32.91; 95% CI 3.64−6.22) and 14.70 (range, 0.27−32.91; 95% CI 0.27−43.60) months for the whole group. The ORR and DCR were 7.7% (2/26) and 69.2% (18/26) for the entire lesions, and 7.7% (2/26) and 79.6% (20/26) for brain metastases, respectively. Compared with patients who received apatinib monotherapy, patients who received apatinib combination treatment had more favorable mPFS (11.77 vs. 2.27 months, p<0.05) and mOS (24.03 vs. 6.07 months, p<0.05). Treatment-related toxicities were tolerable including grade 1/2 hypertension, hand-and-foot syndrome, fatigue, nausea, liver dysfunction, myelosuppression, skin rash, and palpitation. In conclusion, apatinib exhibited high activity and good tolerance for NSCLC patients with brain metastasis, and it might become a potential choice for metastatic brain tumors in NSCLC patients.     

Hope and Academic Procrastination in Adolescents: A Moderated Mediation Model

Academic procrastination among adolescents is an increasingly prominent problem. It is important to look for influences behind academic procrastination in the adolescent population. The present study aimed to reveal the explanatory mechanisms underlying the association between hope and academic procrastination behaviors among Chinese adolescents by testing the mediating role of attentional control and the moderating role of trait mindfulness. Participants in the current study were 1156 Chinese adolescents who completed self-report questionnaires on hope, attentional control, academic procrastination, and trait mindfulness. The results indicated that adolescent hope was negatively related to academic procrastination and that attentional control partially mediated this association. In addition, trait mindfulness moderated the direct association between hope and academic procrastination in the mediated model. In conclusion, identifying the mechanisms by which hope is associated with academic procrastination in adolescent populations is of potential value for the prevention of and intervention in this undesirable study habit.     

中性粒细胞和淋巴细胞比值对根治性前列腺切除术患者生化复发的影响

目的探究接受根治性前列腺切除术治疗的患者,其中性粒细胞和淋巴细胞比值(NLR)与生化复发(BCR)的关系。方法回顾性收集2009年1月至2017年12月于四川大学华西医院接受根治性前列腺切除术(RP)的620例前列腺癌患者的临床资料。运用单因素与多因素Cox回归分析、限制性3次样条回归分析和趋势性检验分析NLR与BCR的关系,用分层分析进一步讨论手术入路、肿瘤大小和前列腺特异性抗原(PSA)水平对NLR与BCR关系的影响。结果术前升高的NLR不会导致BCR(P=0.31)。然而,亚组分析显示,在中等PSA水平组中,升高的NLR可导致BCR风险增加(HR=1.12,95%CI:1.04~1.20,P=0.04)。在经腹腔入路手术的患者中,较高的NLR更容易导致BCR(HR=1.05,95%CI:0.99~1.11,P=0.02)。对于那些肿瘤体积中等(HR=1.06,95%CI:0.93~1.20,P=0.03)或较大(HR=1.02,95%CI:0.94~1.10,P=0.03)的患者,BCR风险可随着NLR的升高而增加。结论对于经腹腔入路手术、肿瘤大小中等或较大、中等PSA水平的患者,生化复发风险与NLR呈正相关。     

重组戊型肝炎病毒P179-海藻酸钠/壳聚糖微球混悬制剂的制备及其免疫效果

目的 制备吸附重组戊型肝炎病毒(hepatitis E virus,HEV)P179抗原的海藻酸钠/壳聚糖微球混悬制剂,并观察其免疫效果。方法 乳化法制备海藻酸钠/壳聚糖微球,采用不同海藻酸钠浓度、混合乳化剂添加量、混合乳化剂亲水亲油平衡值设计正交试验,确定最佳制备工艺参数。将重组HEV P179抗原吸附在最佳工艺制备的微球表面,制备吸附重组HEV P179的海藻酸钠/壳聚糖微球混悬制剂,皮下多点免疫BALB/c小鼠,测定其诱导小鼠产生特异性IgG抗体的能力,与同剂量含弗氏佐剂的重组HEV P179免疫制剂对比。结果 经正交试验确定乳化最佳工艺参数为:海藻酸钠质量分数1%、混合乳化剂体积分数2%,混合乳化剂亲水亲油平衡值4。制备的微球平均粒径为6.73 μm(分布范围3.90~9.10 μm,方差1.78 μm),形态较为均一,透射电镜观察结果与双层球体及内部疏松多孔的微球结构特点相符。用此条件制备抗原质量浓度为500 μg/ml的混悬制剂,微球对抗原的吸附率为90.64%。免疫效果观察试验结果表明,皮下多点免疫试验中微球制剂诱导特异性IgG抗体的能力优于含弗氏佐剂抗原。结论 成功制备了吸附重组HEV P179的海藻酸钠/壳聚糖微球混悬制剂,且诱导产生特异性IgG抗体的能力优于含弗氏佐剂抗原,为其在新型实验动物超敏制剂中的应用奠定了基础。