电信网络诈骗犯罪演化趋势及侦防对策研究

当前电信网络诈骗犯罪呈现许多新的特点:作案手段与信息技术更迭轨迹同步、不断衍变翻新;犯罪地点由点向面扩散,向境外转移趋势明显;侵害对象从“普遍撒网”到“精准定制”再到“孵化培育”;犯罪主体逐步年轻化,犯罪组织从“作坊”进化为“公司”并形成“黑灰产业链”;受害群体遍布各阶层,犯罪数额急速增长。尽管打击此类犯罪取得了一定成效,但屡打屡犯、屡禁不止。打击治理电信网络诈骗犯罪,需坚持侦防结合,预防为主,创新侦防对策理论体系,改革侦查机制和迭代侦查手段技术。侦控方面,要建立侦控运作新机制,建设基层反诈技术生态,斩断相关黑灰产业链;预防方面,要严格落实法律要求,强化反诈预警机制,反诈宣传精准到位,以最大限度为平安中国、法治中国建设作出新贡献。

Effects of combination of irbesartan and perindopril on calcineurin expression and sarcoplasmic reticulum Ca^(2+)-ATPase activity in rat cardiac pressure-overload hypertrophy

Aim： To observe effects of angiotensin （Ang） II receptor antagonist （ATI） irbesartan and angiotensin-converting enzyme （ACE） inhibitor perindopril on rat myocardium calcineurin expression and sarcoplasmic reticulum Ca^2＋-ATPase activity in the model of pressure-overload cardiac hypertrophy. Methods： Forty male adult Sprague Dawley rats were divided into 5 groups One group was treated by sham operation; four groups were myocardium hypertrophy cases caused by banding aortic above renal artery. Drugs were given one week after operation. Group 1： sham group, rats （n=8） were gavaged with normal saline 2 ml/（kg·d） （ig）; Group 2： control group, rats （n=8） were treated with normal saline 2 ml/（kg·d） （ig）; Group 3： rats （n=8） were given perindopril 2 mg/（kg·d） （ig）; Group 4： rats （n=8） were treated with irbesartan 20 mg/（kg·d） （ig）; Group 5： rats （n=8） were given irbesartan 20 mg/（kg·d） plus perindopril 2 mg/（kg·d） （ig）. Morphometric determination, calcineurin expression and sarcoplasmic reticulum Ca^2＋-ATPase activity were done at the end of 6 week of drug intervention. Expression of calcineurin in myocardium was detected by immunohistochemistry. Results： Left ventricular mass index （LVMI）, transverse diameter of myocardial cell （TDM）, calcineurin activity were remarkably decreased after drug intervention and this decrease was most remarkable in the combination drug therapy group. Sarcoplasmic reticulum Ca^2＋-ATPase activity was increased after drug intervention, especially in the combined drug therapy group. Calcineurin expression in myocardium was remarkably decreased after drug intervention. LVMI was positively correlated with TDM and calcineurin, negatively correlated with sarcoplasmic reticulum Ca^2＋-ATPase. Conclusion： These data suggest that irbesartan and perindopril inhibit cardiac hypertrophy through the increased activity of sarcoplasmic reticulum Ca^2＋-ATPase and decreased expression of calcineurin. Their combination had better effects on regressing of ventricular hypertrophy.

白光型金属有机框架材料的最新研究进展

金属有机框架化合物(MOFs)是一类备受关注的多功能杂化材料,结构的多样性使其表现出各种发光性能。尤其是环境友好、使用寿命长、效率高的白光MOFs材料的出现为新型发光MOFs的设计和制备提供了契机。我们旨在总结白光MOFs的最新研究进展,着重对其合成方法及应用进行综述,主要包括镧系离子共掺杂、镧系元素封装或有机分子捕获等获得可调控的白光MOFs的方法及其在温度、分子和金属离子传感器等领域的潜在应用。同时,针对白光MOFs材料面临的挑战和未来发展也进行了梳理。以期引起设计和构建新型发光MOFs的研究人员的关注与兴趣。

343例获得性免疫缺陷综合征患者眼底情况的临床分析

目的探讨获得性免疫缺陷综合征(acquired immunodeficiency syndrome,AIDS)患者的眼底病变特点及其与全身伴发疾病的关系。设计回顾性病例系列。研究对象2015年3月至2016年12月就诊于北京地坛医院的AIDS患者343例。方法对343例AIDS患者进行全身及眼科检查,包括视力、眼压、裂隙灯、双目间接检眼镜以及眼底照相等,并观察其临床特征,按照眼底表现分为:巨细胞病毒性视网膜炎(cytomegalovirus retinitis,CMVR)组、人类免疫缺陷病毒(human immunodeficiency virus,HIV)视网膜病变组、对照组。主要指标视力、眼底、CD4+T细胞计数、外周血HIV病毒载量。结果343例患者中46例(56眼)为CMVR,74例(154眼)为HIV视网膜病变,对照组与CMVR组及HIV微血管病变组相比,经过6个月以上高效抗逆转录病毒治疗(highly active anti-retroviral therapy,HAART)者更多。CMVR组CD4+细胞计数为(53.86±101.14)/μL,HIV视网膜病变组为(33.69±47.06)/μL,对照组为(120.28±175.80)/μL,CD4+细胞数低于50/μL是CMVR的危险因素(P=0.000)。65例出现结核感染,20例出现隐球菌脑膜炎,68例伴随梅毒感染。共39眼视力≤0.3。所有患眼中出现视盘水肿19眼,视神经萎缩14眼,玻璃体混浊28眼,白内障8眼,陈旧性CMVR 12眼,视网膜脱离12眼。视盘水肿与隐球菌性脑膜炎、梅毒感染有关(P=0.000)。视神经萎缩与隐球菌性脑膜炎、陈旧CMVR病灶相关(P=0.000),CMVR与视网膜脱离、玻璃体混浊相关(P=0.000)。结论CD4+T淋巴细胞计数较低是CMVR危险因素。AIDS伴发疾病导致的眼底损害需要重视。