西部贫困农村5岁以下儿童营养不良状况分析

目的分析西部贫困农村5岁以下儿童营养不良状况。方法利用科技支撑项目"贫困农村地区儿童营养缺乏改善适宜技术的研究"资料,对8141名调查对象营养状况进行分析。采用WHO 2006的身高标准体重参考值作为评价标准计算Z评分,应用SAS 9.1软件进行统计分析。结果 2009年,中国西部6省(自治区)贫困农村5岁以下儿童的生长迟缓率为14.9%,低体重率为7.4%,消瘦率为3.5%。结论我国西部贫困农村儿童营养不良状况仍然较为严重。在改善儿童营养状况时,应因地制宜,根据不同类型地区的特点和引起儿童营养不良发生的因素采取综合措施。     

The impact of the COVID-19 pandemic on hepatitis B virus vaccination and transmission among men who have sex with men: A mathematical modelling study

BackgroundDuring the COVID-19 pandemic, the number of hepatitis B virus (HBV) vaccinations among men who have sex with men (MSM) has been considerably lower than before the pandemic. Moreover, less frequent HBV testing and a reduction in numbers of sex partners have been reported. We assessed the impact of these COVID-19-related changes on HBV transmission among MSM in the Netherlands.MethodsWe estimated the changes in sexual activity, HBV testing, and HBV vaccination among MSM during the pandemic from Dutch data. We used a deterministic compartmental model and investigated scenarios with small or large declines in sexual activity, testing, and vaccination for the current phase of the pandemic (without available data). We examined the increase in HBV vaccinations needed to prevent further increase in HBV incidence.ResultsWith a decrease in numbers of sex partners of 15–25% during the first lockdown and 5% during the second lockdown, we found a decline of 6.6% in HBV incidence in 2020, despite a >70% reduction in HBV testing and vaccination during the first lockdown. With numbers of sex partners rebounding close to pre-pandemic level in 2021, and a reduction of 15% in testing and 30% in vaccination in 2021, we found an increase of 1.4% in incidence in 2021 and 3.1% in 2026. With these changes, an increase of ≥60% in HBV vaccinations in 2022 would be needed to bring the HBV incidence in 2023 back to the level that it would have had if the COVID-19-related changes had not occurred.ConclusionsDespite reductions in sexual activity during the COVID-19 pandemic, the decrease in HBV vaccinations may result in a small increase in HBV incidence after 2021, which may persist for years. It is important to restore the vaccination level and limit further increase in HBV transmission among MSM.     

Mock jurors’ awareness of age-related changes in memory and cognitive capacity

While age-related changes in memory have been well documented, findings about jurors’ perceptions of older witnesses are conflicting. We investigated the effect of victim age (25 vs. 75?years old) and crime severity (victim injured vs. not injured) on mock jurors’ decisions in a robbery trial. Jury-eligible participants (120 women; 84 men) read a mock trial summary and delivered their verdicts online. Mock jurors believed the young victim more than the older victim when the crime was severe, while no age differences emerged for the less severe crime. Whereas previous research demonstrated that juror characteristics were generally associated with culpability, we demonstrated that with case-specific information, these general views became less important. In all, mock jurors were aware of age-related decline in memory provided by eyewitnesses only to a limited extent. Accordingly, in trials involving older witnesses, jurors will benefit from educative information about age-related memory changes.     

糖尿病肛瘘lncRNA芯片分析及CNC图搭建＊

目的 研究糖尿病肛瘘创面特异表达LncRNA与mRNA基因功能之间调控网络。方法 用基因芯片技术对糖尿病肛瘘创面和普通肛瘘创面组织中差异性表达的LncRNA及mRNA进行基因表达谱检测，筛选的标准为2倍差异及P < 0.05,再进行差异表达分析，然后对差异表达的mRNAs进行KEGG通路分析及Pathway Map展示，挑选出显著mRNA指标，将这些显著mRNA指标进行q-PCR验证，得到有意义的阳性指标，再将阳性指标与差异LncRNA交集得出LncRNA-mRNA共表达网络，并基于LncRNA-mRNA共表达网络挑选出不同LncRNA进行功能验证。结果 将芯片标准化后分析差异表达的长链非编码RNA和mRNA，发现上调差异有502个，下调差异有1204个；mRNA分析发现上调差异621个，下调差异505个，KEGG通路分析发现上调和下调的通路均有10条；通过分别对上调、下调最明显的通路进行Pathway Map展示，挑选出显著mRNA指标8个：BMP2、IFNB1、IL6、IL18、PIK3CB、SMAD7、SMAD9、β-actin，分别将其进行q-PCR验证，得到有意义的阳性指标个5个：BMP2、IL6、IL18、PIK3CB、SMAD7，将5个阳性指标和差异LncRNA交集得出LncRNA-mRNA共表达网络，并基于LncRNA-mRNA共表达网络挑选出不同LncRNA进行功能验证。结论 挑选出的20个LncRNA（NR_125383、T323486、ENST00000582334、TCONS_00018312、ENST00000418393、TCONS_00017190、TCONS_00019532、ENST00000601559、ENST00000566575、NR_109882、NR_026913、T301537、NR_109774、ENST00000415536、ENST00000610000、ENST00000412485、ENST00000573220、T175957、ENST00000580756、TCONS_00014747）所调控的mRNA居于LncRNA-mRNA共表达网络，其在各个领域当中均有不同程度的报道，为后续的功能和机制研究提供了方向和重点，为加速慢性难愈合和创面愈合的研究提供了新的思路，为开发促愈药物提供基础研究借鉴。