转录因子FOXQ1和增殖指数Ki67在进展期胃癌组织中相关性研究

目的：研究进展期胃癌组织中叉头框Q1（FOXQ1）与细胞增殖指数Ki67表达的相关性,分析两者表达水平对治疗预后的影响。方法：进展期胃癌167例,运用免疫组化法检测癌组织中FOXQ1和 Ki67蛋白的表达水平。采用Pearson法对FOXQ1与Ki67表达进行相关性分析,采用χ2检验分析FOXQ1和Ki67表达与临床参数的关系,Kaplan-Meier生存曲线和Log-rank检验分析患者无复发生存期（RFS）,采用Cox比例风险回归分析影响RFS的因素。结果：FOXQ1在胃癌组织中高表达,并与Ki6表达水平呈正相关性（r=0.77,P＜0.001）。患者RFS与FOXQ1高表达（HR=2.962,P<0.001）、Ki67高表达（HR=2.416,P<0.001）有关。FOXQ1和Ki67高表达患者术后RFS生存率低于FOXQ1和Ki67表达阴性者,差异具有统计学意义（P＜0.05）。结论：进展期胃癌组织中FOXQ1和Ki67高表达,两者表达水平呈正相关,FOXQ1及Ki67高表达影响SOX化疗方案的效果,与患者术后复发及RFS缩短相关。     

妊娠妇女血清辅酶Q10水平与其新生儿出生体质量的关联性分析

目的：探讨妊娠妇女血清辅酶Q10（CoQ10）水平与新生儿体质量的关联性,阐明CoQ10对新生儿体质量的影响。方法：选取240例孕妇,应用酶联免疫吸附（ELISA）法测定孕妇血清CoQ10水平。根据新生儿体质量分为低体质量组、正常体质量组和巨大儿组,记录新生儿母亲血清CoQ10水平。根据产检妇女血清CoQ10第75百分位数分为CoQ10 ≥ 0.85μmol·L^-1组和CoQ10<0.85μmol·L^-1组,记录2组新生儿体质量。采用Spearman相关分析法分析孕妇血清CoQ10与新生儿体质量的相关性。结果：正常体质量组（0.91μmol·L^-1±0.41μmol·L^-1）和低体质量组（0.88μmol·L^-1±0.38μmol·L^-1）孕妇血清CoQ10水平高于巨大儿组（0.64μmol·^-1±0.23μmol·L^-1）,差异有统计学意义（t=7.04,P<0.05;t=7.25,P<0.05）;孕妇血清CoQ10水平与新生儿体质量呈负相关关系（r=-0.17,P=0.00）。CoQ10 ≥ 0.85μmol·L^-1组新生儿出生体质量（3209.08g±320.15g）低于CoQ10<0.85μmol·L^-1组（3823.81g±189.04g）,差异有统计学意义（P<0.05）。孕早期、孕晚期CoQ10水平和平均孕期CoQ10水平是影响新生儿体质量的因素（P<0.05或P<0.01）;孕早期、孕晚期CoQ10水平和平均孕期CoQ10水平是影响新生儿体质量的保护性因素（P<0.05）。结论：妊娠妇女血清CoQ10水平对其新生儿体质量有一定的影响。     

激光治疗面部雀斑疗效的定量判定

目的：通过计算机数字化分析，对激光治疗面部雀斑前后进行定量判定，探索一种客观、科学的疗效评定方法。方法：随机入选30名雀斑患者，治疗前在恒定的光强度下用图像采集系统摄取局部雀斑图像，用Q开关Nd：YAG激光治疗面部雀斑。分别让患者于治疗后2、4、6、8、15周进行复诊，再次摄取同一部位的局部皮损图像。将所荻取的图像在特定的图像分析系统下逐个进行分析，荻取各自的检测值，评判治疗效果。结果：运用色斑检测系统分析图像采集结果显示：经Q开关Nd：YAG激光治疗后，30名雀斑患者治愈率为53．3％，有效率为90％。结论：通过色斑检测系统对激光治疗面部雀斑前后的变化进行定量判定，提高了评价方法的客观性和科学性。     

Protective effects of antioxidant medications on limb ischemia reperfusion injury

BACKGROUND: N-acetylcysteine, beta-glucan, and coenzyme Q(10) were shown to have antioxidant and anti-inflammatory effects on reperfusion injury. The aim of our study was to determine and evaluate the effects of these agents on ischemia reperfusion injury of limb. MATERIAL AND METHOD: Forty-four New Zealand white rabbits, all female, weighing between 2.3 to 4.2 (mean 3.8) kg, were used in the study. Four study groups were arranged of 11 animals each, by randomization. The first group was the control group (Group C), the other groups were the Group Q, which was medicated with coenzyme Q10, the Group betaG, which was medicated with beta-glucan, and the Group N, medicated with N-acetylcysteine. After baseline measurements, for the ischemia-reperfusion experiments, common iliac artery was clamped and collateral flow was occluded by a rubber arterial tourniquet wrapped around the thigh at the proximal third of the leg. After 60 min of transient ischemic period, the limb was perfused for 180 min. After perfusion, biopsy was taken from the adductor magnus muscle. Second blood sampling was done after reperfusion period. Blood and tissue analysis were done and evaluated statistically. RESULTS: Baseline and post-reperfusion levels of glutathione peroxidase (GPx), super oxide dismutase (SOD), malonyldialdehyde (MDA), and nitric oxide (NO) changed significantly. While MDA levels increased in the control group, it decreased in the other study groups. The increase in GPx and SOD levels were significant in all groups except the control group. Levels of NO were found to have decreased in the control group, whereas it had increased in the other groups. CONCLUSION: Antioxidant medication may help lowering limb ischemia reperfusion injury. All mentioned medications in our study are shown to be able to have an effective role for preventing ischemia reperfusion injury to some extent through their antioxidant properties.     

Exploratory investigation of Q fever in apparently healthy meat sheep flocks in Belgium

Q fever is a cosmopolitan disease affecting both humans and many animal species. Although sheep are often implicated in human Q fever outbreaks, the disease remains largely underestimated in meat sheep flocks. In order to fulfil this gap, a preliminary study was performed aiming to investigate the serological and molecular aspects of infection with Coxiella burnetii among meat sheep flocks in Belgium. Five Belgian sheep flocks were recruited for this work. Indirect ELISA was used, and in addition, real‐time PCR was performed on samples of milk, rectal and vaginal swabs, to understand the dynamics of bacterial shedding. Despite the low overall apparent seroprevalence of 1.39% (95% CI : 0.04–7.5), a high rate of bacterial shedding was found, with 27.7% of tested sheep (N  = 72) with a positive result to PCR , especially through the rectal and vaginal routes and in seronegative animals. Furthermore, Coxiella burnetii DNA was detected in 26.76% of seronegative animals. It can be concluded that an overall good clinical condition of the sheep cannot be used to exclude the presence of C. burnetii in a flock. Furthermore in the diagnosis of Q fever in sheep, serology alone was not a sensitive diagnostic tool. On the contrary, molecular biology allowed to detect bacterial shedding, which is an essential element in order to assess the risk due to the contact with shedding animals. At the light of these results, the role of meat sheep flocks in the epidemiology of Q fever in Belgium needs to be better understood.     

结直肠癌中辅酶Q10的功能及分子机制探讨

目的：探索辅酶Q₁₀(coenzyme Q₁₀,CoQ₁₀)对结直肠癌细胞增殖和迁移能力的影响及潜在分子机制。方法：使用CoQ₁₀分别处理SW480细胞和RKO细胞后,采用细胞计数和细胞划痕实验探究CoQ₁₀对结直肠癌细胞增殖和迁移能力的影响;采用流式细胞术探究CoQ₁₀对结直肠癌SW480细胞周期和细胞凋亡的影响;采用RNA-seq测序分析CoQ₁₀对结直肠癌RKO细胞系基因表达谱的影响,将差异表达基因进行GO和KEGG通路分析,最后采用定量RT-PCR验证RNA-seq结果。结果：(1)CoQ₁₀对结直肠癌细胞系SW480的细胞增殖、细胞周期、细胞凋亡和细胞迁移均无明显影响,对结直肠癌细胞系RKO的细胞增殖也无明显影响,但可抑制RKO细胞迁移。(2)CoQ₁₀处理结直肠癌RKO细胞后的RNA-seq结果表明,差异表达基因明显富集于细胞黏附分子信号通路、细胞外基质受体信号通路和胆固醇信号通...     

Event-free survival in patients after an acute coronary event with exercise-induced normalization of the T-wave

BACKGROUND: Risk stratification of patients with unstable angina or non-Q-wave myocardial infarction (MI) is an unresolved clinical problem. The prognostic value of T-wave normalization (TWN) during exercise has not been studied in this group of patients. HYPOTHESIS: Event-free survival in clinically stable patients after an acute coronary event without ST-segment elevation can be predicted by the presence of exercise-induced TWN. METHODS: Sixty-five patients (43 men and 22 women, mean age 62+/-10 years) entered the study. The diagnosis of unstable angina and non-Q-wave MI was made in 40 and 25 patients, respectively. A treadmill exercise test was performed in all patients after clinical stabilization. The patients were divided into three groups: those with negative baseline T waves and exercise-induced TWN (Group 1); those with negative baseline T waves, but without TWN (Group 2); and those with positive baseline T waves (Group 3). The patients were followed up for 6 months. RESULTS: During follow-up, serious cardiovascular complications occurred in 15 (23%) patients. These included exacerbation of ischemic heart disease (14 patients) and acute MI (1 patient). Event-free survival was greater in patients in Group 1 (95%) than in those in Group 2 (68%, p < 0.034) or Group 3 (71%, NS). Among all patients studied, exercise-induced TWN was predictive of event-free survival with a sensitivity of 38% and a specificity of 93%. CONCLUSIONS: In clinically stable patients after an acute coronary event without ST-segment elevation, exercise-induced TWN is a specific but n ot sensitive predictor of event-free survival after 6 months.     

Identification of hemoglobin Q India (α 1–64 Asp–His) through ARMS-PCR. First report from Pakistan

Various hemoglobinopathies have been reported from Pakistan excepting the rare ones like hemoglobin Q India. Our purpose of study was to identify the mutation (α 1 64 aspartate to histidine) through amplification restriction mutation system-polymerase chain reaction (ARMS-PCR) in patients where hemoglobin Q has been detected via high performance liquid chromatography (HPLC) and also to evaluate the cost effectiveness of the two technologies. All patients irrespective of age and gender who underwent HPLC for identification of their hemoglobin variant during January 1, 2006 to January 30, 2007 were studied. The blood samples with unknown peak at a retention time of 4.7 min were evaluated at the molecular level. Analysis of HPLC tracings of 11,008 subjects over a thirteen-month period identified ten individuals with hemoglobin Q. Male to female ratio was 1:1.5 and their age was variable ranging from 1 to 49 (mean 22.8) years. The mean hemoglobin level was 11.3 g/dl while MCV (fl) and MCH (pg) were 73.0 and 20.8 respectively. HPLC showed an unknown peak of 17.7% which was detected as Hb Q. ARMS based PCR showed Hb Q specific product of 370 bp and also an amplified product of 766 bp as the control fragment in these samples. This is the first ever report that documents the presence of Hb Q India (α 64 Asp to His) in Pakistani population. We recommend that HPLC be used as a useful screening tool especially in developing countries where PCR facilities may not be accessible.     

Slowed ST segment recovery despite early infarct artery patency in patients with Q waves at presentation with a first acute myocardial infarction. Implications of initial Q waves on myocyte reperfusion.

BACKGROUND: The presence of Q waves at presentation with a first acute myocardial infarction reflects a more advanced stage of the infarction process. When infarct-related artery patency (Thrombolysis in Myocardial Infarction 2 or 3 flow) is restored, resolution of ST segment elevation indicating successful myocyte reperfusion may differ according to how far the infarction process has progressed. METHODS AND RESULTS: In 144 patients with a first acute myocardial infarction treated with streptokinase in the first Hirulog Early Reperfusion Occlusion trial, information was obtained from continuous ST segment monitoring, the presenting electrocardiogram and early angiography performed at a median time of 99 min after the commencement of streptokinase (interquartile range 89-108 min). We determined how many patients had 50% ST recovery within 120 min and in how many cases it was sustained over 4h. In the 109 patients with patent infarct-related arteries, 50% ST recovery occurred in 95% of patients without vs 80% of those with initial Q waves (P=0.03), and sustained ST recovery occurred in 67% of patients without vs 47% of those with initial Q waves (P=0.03). On multivariate analysis including the time from symptom onset to streptokinase therapy, the presence of Q waves at presentation was the only predictor of failure to achieve 50% ST recovery (odds ratio 5.08, 95% confidence interval 1.29-20.01, P=0.02). TIMI 2 flow, as opposed to TIMI 3 flow, was the only predictor of failure to achieve stable ST recovery (odds ratio 2.63, 95% confidence interval 1.15-5.88,P =0.02). CONCLUSION: The presence of initial Q waves predicts slower and less complete ST recovery, reflecting reduced myocyte reperfusion, even in those with early infarct artery patency. These patients may be targeted for new therapeutic strategies to improve microvascular reperfusion.