An epidemiologic study of sleep-disordered breathing in a large sample of Chinese adolescents

Journal of Public Health - Sleep-disordered breathing (SDB) is common among adolescents and is associated with short- and long-term consequences. Data on the prevalence and epidemiologic...     

人IL-1β重组表达载体在肝癌细胞的表达及对其NK细胞杀伤敏感性的影响

目的：构建全长人IL-1β真核表达载体,转染H7402肝癌细胞,分析对其NK细胞杀伤敏感性的影响。方法：RT-PCR法扩增人IL-1β基因全长编码序列,经T-A克隆,构建pIRES2-EGFP-IL-1β重组表达载体,采用阳离子聚合物jetPEI的方法转染H7402肝癌细胞,G418筛选获得稳定表达的细胞克隆,RT-PCR分析IL-1β的表达水平,MTT方法分析转染前后NK细胞对肝癌细胞杀伤活性的变化。结果：从LPS处理的人外周PBMCs总RNA中扩增出IL-1β（大小约829 bp）,先构建pMD18-IL-1β克隆载体,DNA序列鉴定正确后,利用Pfu DNA聚合酶将IL-1β基因亚克隆到pIRES2-EGFP中,构建真核表达载体pIRES2-EGFP-IL-1β,经PCR、限制性酶谱分析（BamHⅠ和EcoRⅠ）和DNA序列测定正确后,将其转染H7402肝癌细胞,G418筛选获得稳定表达IL-1β的细胞,与转染空载体的细胞相比,该细胞对NK-92细胞杀伤的敏感性显著降低,效靶比10∶1时下降了约30%。结论：促炎性细胞因子IL-1β能够显著增强肝癌细胞对NK细胞杀伤的抵抗性,可能是导致肝癌细胞发生天然免疫逃逸的重要机制。     

Expression of recombinant mouse IL-1beta significantly down-regulates NK cell mediated cytotolysis against H22 hepatoma cells]

AIM: To investigate the effect of the expression of recombinant IL-1beta in H22 hepatoma cells on its response to NK cell mediated cytotoxicity. METHODS: BALB/c mouse was stimulated by 6% of starch. Total RNA was prepared from peripheral blood monocytes (PBMCs). IL-1beta gene (843 bp) was obtained by RT-PCR. The purified PCR product digested by Xho I and EcoR I was cloned into pIRES2-EGFP to construct the recombinant pIRES2-EGFP-mIL-1beta expression vector which was verified by PCR, restriction enzyme assay (Xho I and EcoR I) and DNA sequencing. Then the purified pIRES2-EGFP-mIL-1beta plasmid was transfected into H22 hepatoma cells by jetPEI. The expression level of recombinant IL-1beta was detected by RT-PCR and confocal microscopy. The cytotoxicity of wild-type spleenic NK cells against H22 cells was assessed by MTT assay. RESULTS: After the total RNA isolated from the starch stimulated BALB/c mouse PBMC, 843 bp IL-1beta gene in length was prepared by RT-PCR. The purified PCR product digested by EcoR I and Xho I was ligated by pIRES2-EGFP to create pIRES2-EGFP-mIL-1beta expression plasmid which was verified by PCR, restriction enzyme assay and DNA sequencing. Then pIRES2-EGFP-mIL-1beta was transfected into H22 hepatoma cells by jetPEI. RT-PCR and confocal microscopy assay showed these cells expressed high level of recombinant IL-1beta expression vector. In a 4-hour based MTT assay, IL-1beta in H22 cells was more resistant to NK92 cell mediated cytotoxicity compared with the cells transfected with pIRES2-EGFP. Meanwhile, the cytolytic capacity of the spleenic NK cells separated from wild-type mouse decreased about 10% when the ratio of effector to target was 40:1. CONCLUSION: The expression of proinflammatory cytokine IL-1beta can significantly down-regulate the cytolytic activity of NK cells against H22 hepatoma cells. It plays a crucial role in the immune escape of hepatoma from NK cell mediated innate immunity.     

屈光参差性弱视患儿综合治疗效果的相关因素研究

目的：探究影响屈光参差性患儿综合治疗效果的相关因素,为临床干预提供理论依据。

方法：选取我院2013-10/2014-10间收治的100例屈光参差性弱视患儿,经过6～18mo的治疗后根据治疗效果分为A、B、C三组,A组54例,治疗效果判定为治愈; B组34例,治疗效果判定为进步; C组12例,治疗效果判定为无效。对其年龄、依从性、屈光参差程度、屈光参差类型、弱视程度、注视性质进行分析。

结果：三组患者之间屈光参差类型差异无统计学意义(P>0.05),而三组患者之间年龄、治疗依从性、屈光参差程度、弱视程度、注视性质相比差异有统计学意义(P<0.05)。通过回归方程分析各因素对综合治疗效果影响程度依次为弱视程度、屈光参差程度、注视性质、年龄、依从性。

结论：屈光参差性患儿综合治疗效果与年龄、治疗的依从性、屈光参差程度、弱视程度、注视性质密切相关,而与患儿的屈光参差类型无明显的相关性。     

成纤维细胞生长因子21对载脂蛋白E基因敲除小鼠动脉粥样硬化病变中内质网应激诱导的凋亡的影响

目的　探讨成纤维细胞生长因子21（FGF-21）对载脂蛋白E基因敲除（ApoE^-/-）小鼠主动脉中内质网应激诱导的凋亡的影响。方法　将24只ApoE^-/-小鼠随机分为动脉粥样硬化模型组（简称模型组）和FGF-21组（n12）,另选12只C57BL/6J小鼠作为正常对照组,三组小鼠都给予高胆固醇饮食4周,同时FGF-21组皮下给予FGF-21［0.1　mg　/（kg·d）］4周,而模型组和正常对照组给予等量生理盐水。4周后处死小鼠进行主动脉病理学检测,观察斑块面积,采用放射免疫法检测血浆中FGF-21的水平,采用免疫组织化学染色和Western　Blot检测主动脉成纤维细胞生长因子受体1（FGFR-1）的表达水平,采用Tunel染色检测主动脉斑块中的细胞凋亡水平,采用Western　Blot检测主动脉中剪切后Caspase-12和C/EBP　同源蛋白（CHOP）的表达水平。结果　与正常对照组比较,模型组血浆中的FGF-21水平及主动脉中FGFR1蛋白表达显著升高　（P<0.05）,模型组主动脉根部斑块面积、细胞凋亡数量、剪切后Caspase-12及CHOP蛋白的表达水平增加（P<0.05）;与模型组比较,FGF-21组主动脉根部斑块面积、细胞凋亡数量、剪切后Caspase-12及CHOP蛋白的表达水平减少（P<0.05）。结论　FGF-21可能通过抑制剪切后Caspase-12及CHOP相关促凋亡蛋白表达,抑制ApoE^-/-小鼠主动脉斑块病变中细胞的凋亡及斑块进展。     

FIZZ1 Plays a Crucial Role in Early Stage Airway Remodeling of OVA-Induced Asthma

The aim of this study was to elucidate the role of Found in Inflammatory Zone 1 (FIZZ1, also known as RELM-α or resistin-like molecule-α) in airway remodeling in asthma. We used a rat model of ovalbumin (OVA) sensitization and challenge to induce lung inflammation and remodeling. Expression of α -SMA in the lungs of OVA-treated rats was significantly elevated in the peribronchial regions compared with control saline-treated animals. Expression of FIZZ1 mRNA in alveolar epithelial type II cells (AECII) isolated from OVA-treated animals was higher than in control animals. Forced expression of recombinant FIZZ1 in rat-1 lung fibroblast cell line enhanced production of collagen type I and α -SMA compared with control transfected cells. These results suggest that FIZZ1 can induce fibroblasts to express markers of myofibroblast differentiation such as α -SMA and collagen type I, which are characteristic of early stages of airway remodeling seen in asthma.     

HPLC测定维拉帕米栓中盐酸维拉帕米的含量

目的 建立高效液相色谱法测定维拉帕米栓中盐酸维拉帕米的含量.方法以DianmonsilTM(钻石)(250 mm×4.6mm,5μm)C18为色谱柱,醋酸-醋酸钠溶液甲醇三乙胺(45551)为流动相,紫外检测波长为278 nm.结果盐酸维拉帕米在0.4～2.0 mg·mL-1内线性关系良好(r=0.999 8),平均回收率为101.41%,RSD=2.05%(n=9).三批维拉帕米栓中盐酸维拉帕米的标示含量分别为106.81%,101.01%,98.61%.结论 本方法操作简便、快捷,结果准确、可靠,适用于维拉帕米栓的质量控制.     

钙剂加阿司匹林综合治疗妊娠期高血压疾病的疗效及机制

目的:探讨钙剂加小剂量肠溶阿司匹林对妊娠期高血压疾病的疗效及可能的机制.方法:妊娠期高血压疾病的孕妇78例分为对照组和实验组各39例,前者仅用硫酸镁常规解痉降压,后者在解痉降压基础上口服多维钙咀嚼片(迪巧)及小剂量肠溶阿司匹林. 观察两组母婴结局. 平均动脉血压、24 h尿蛋白和血清钙水平的改变,以及凝血和血栓前状态分子标志物水平的变化. 结果:实验组和对照组胎心异常率依次为7.69%和23.08%,差异具有统计学意义(P<0.01). 治疗前实验组平均动脉血压为(126.2±15.6) mmHg (1 mmHg=0.133 kPa), 24 h尿蛋白为(3.85±0.47) g和血清钙为(1.83±0.41) mmol/L,治疗后依次为(102.5±16.8) mmHg, (1.56±0.63) g和(2.44±0.35) mmol/L,差异具有统计学意义(P<0.01～0.05). 实验组治疗前PT, Fbg, TAT和D-dimer检测值依次为(10.92±0.55) s, (5.8±1.3) g/L, (24.5±4.3) mg/L和(1.55±0.46) mg/L,治疗后依次为(11.26±0.82) s, (4.2±0.6) g/L, (9.56±3.7) mg/L和(0.72±0.22) mg/L,差异均具有统计学意义(P<0.01～0.05). 结论:钙剂加小剂量肠溶阿司匹林治疗妊娠期高血压疾病效果较好,能有效降低平均动脉血压,改善患者孕妇凝血功能和血栓前状态,改善母婴结局.     

妊娠高血压疾病孕妇眼底病变与眼动脉血流动力学特点的相关性研究

目的:观察彩超检测孕妇眼动脉血流参数与妊娠高血压疾病(HDCP)孕妇眼底病变的相关性,探讨其在临床HDCP诊断和治疗中的价值。方法:以40例正常孕妇作为对照组,测定73例HDCP组孕妇眼动脉搏动指数(PI)、阻力指数(RI)及收缩期第二峰(B)与第一峰(A)的比值(B/A);同时检查两组眼底改变,比较不同程度眼底病变时眼动脉血流参数的变化。结果:①眼动脉的PI、RI值与孕妇年龄及孕龄无明显相关(P>0.05),而B/A值与孕妇年龄有显著相关性(P<0.001);②HDCP孕妇眼动脉的PI、RI值明显低于正常孕妇(P<0.05),而B/A值则明显升高(P<0.05);③HDCP孕妇眼底病变程度与PI、RI及B/A值显著相关(P<0.001),眼底病变越严重,PI、RI值越低,而B/A值越高:④眼底改变程度与临床病情严重程度显著相关(P<0.001)。结论:检测孕妇眼动脉的血流参数结合其眼底病变情况对HDCP的临床诊断及治疗具有明显的参考意义。