Plastin 1 drives metastasis of colorectal cancer through the IQGAP1/Rac1/ERK pathway

Tumor metastasis is the dominant cause of death in colorectal cancer (CRC) patients, and it often involves dysregulation of various cytoskeletal proteins. Plastin 1 (PLS1) is an actin‐bundling protein that has been implicated in the structure of intestinal epithelial microvilli; however, its role in CRC metastasis has not yet been determined. In this study, we demonstrated that PLS1 is highly expressed in 33.3% (45/135) of CRC patients and is correlated with lymph node metastasis and poor survival. In in vitro and in vivo experiments, PLS1 induced the migration and invasion of CRC cells and the metastases to the liver and lung in mice. Moreover, the expressions of key factors for CRC metastases, matrix metalloproteinase (MMP) 9 and 2, were enhanced by PLS1, which was dependent on phosphorylating ERK1/2 activated by IQGAP1/Rac1 signaling. The connection between these signals and PLS1 was further confirmed in CRC tissues of patients and the metastatic nodules from a mouse model. These findings suggest that PLS1 promotes CRC metastasis through the IQGAP1/Rac1/ERK pathway. Targeting PLS1 may provide a potential approach to inhibit the metastasis of CRC cells.     

左归降糖解郁方对糖尿病并发抑郁症大鼠海马胰岛素抵抗的影响

目的研究左归降糖解郁方对糖尿病并发抑郁症大鼠海马胰岛素抵抗的调节作用。方法建立糖尿病并发抑郁症大鼠模型,并随机分为4组,模型组,阳性药组(二甲双胍0.18 g/kg+氟西汀1.8 mg/kg),左归降糖解郁方高、低剂量组(20.52、10.26g/kg),另设健康大鼠为对照组。各组大鼠ig给药28 d后,采用血糖仪及ELISA法检测空腹血糖及外周胰岛素抵抗程度。采用旷野实验和强迫游泳实验检测大鼠抑郁样行为。采用免疫荧光法和Western blotting法检测大鼠海马胰岛素受体磷酸化蛋白(p-IR)、磷酸化的胰岛素受体底物-1(p-IRS-1)的表达,采用Westernblotting法检测海马磷酸化的磷脂酰肌醇3-激酶(p-PI3K)、磷酸化蛋白激酶B(p-Akt)蛋白的表达。结果与对照组比较,模型组大鼠血糖显著升高并伴随明显的外周胰岛素抵抗,其在旷野实验中的活动次数显著降低、在强迫游泳实验中的不动时间显著延长;蛋白检测结果表明大鼠脑内p-IR、p-IRS-1、p-PI3K、p-Akt表达水平均显著降低。与模型组比较,左归降糖解郁方高剂量组大鼠血糖水平显著降低,外周胰岛素抵抗水平减轻,其在旷野实验中的活动次数显著增加、在强迫游泳实验中的不动时间显著缩短,而海马内p-IR、p-IRS-1、p-PI3K、p-Akt表达显著升高。结论左归降糖解郁方可有效调节糖尿病并发抑郁症大鼠海马胰岛素信号通路,从而改善动物脑内的胰岛素抵抗状态。     

芪参益气滴丸对急性心肌梗死PCI术后患者血清学指标及预后的影响

摘 要 目的:探讨芪参益气滴丸对急性心肌梗死PCI术后患者各血清学指标及预后的影响。方法:选取110例急性心肌梗死患者为研究对象，所有患者均接受PCI术治疗，根据入院单双号将受试者分为对照组（n=55）和研究组（n=55），对照组患者术后给予常规西药治疗，研究组患者在对照组的基础上口服芪参益气滴丸治疗，比较两组患者的治疗总有效率、治疗前后各炎性因子水平及各血管内皮功能指标变化，随访1年后，比较两组不良心血管事件发生率。结果:研究组患者治疗总有效率显著高于对照组（P＜0.05）；与治疗前相比，治疗后两组患者各炎性因子水平均明显降低，且研究组显著低于对照组（P＜0.05）；与治疗前相比，治疗后两组患者各血管内皮功能指标均明显改善，且研究组显著优于对照组（P＜0.05）；研究组患者不良心血管事件发生率显著低于对照组（P＜0.05）。结论:芪参益气滴丸可有效改善患者的血管内皮功能，抗炎作用显著，减少不良心血管事件发生率，疗效确切，对改善急性心肌梗死PCI术后患者预后具有积极意义。     

新型冠状病毒肺炎与传染性非典型肺炎的流行病学特征分析

新型冠状病毒肺炎(COVID-19)与非典型肺炎(严重急性呼吸综合征,SARS)均是由冠状病毒引起的严重的传染性疾病,二者的发病原因至今仍不清楚且目前均无特效的治疗药物。因此,了解COVID-19与SARS的流行病学及病理病原学特征对其预防和治疗就显得尤为重要。本文通过回顾文献,并结合国内外的最新研究现状,从病原学、三间分布和病理学等方面对COVID-19与SARS两种疾病进行了探讨。结果 显示,两种传染病在临床特征上存在很多相同点,但在疾病进程、严重程度和影像学上存在一定差异,COVID-19的传染比SARS更强,但其病死率低于SARS,并且两者的病理改变也有所不同。本文还通过对比SARS流行时的经验与教训,梳理了此次COVID-19疫情期间疾病防控存在的漏洞与不足,以及针对现阶段存在的问题提出建议,从而为两种疾病的预防、治疗及发病机制研究提供一定的科学依据。     

Prevalence and risk factors of steatosis and advanced fibrosis using transient elastography in the United States' adolescent population

BACKGROUND Non-alcoholic fatty liver disease(NAFLD) is the leading cause of chronic liver disease in children and adolescents.AIM To determine the prevalence and risk factors of steatosis and advanced fibrosis using transient elastography(TE) in the United States' adolescent population.METHODS Using the National Health and Nutrition Examination Survey 2017-2018, adolescent participants aged 13 to 17 years who underwent TE and controlled attenuation parameter(CAP) were included in this study. Forty-one factors associated with liver steatosis and fibrosis were collected. Univariate and multivariate linear regression analysis were used to identify statistically significant predictors.RESULTS Seven hundred and forty participants met inclusion criteria. Steatosis(S1-S3), based on CAP, and advanced fibrosis(F3-F4), based on TE, were present in 27% and 2.84% of the study population, respectively. Independent predictors of steatosis grade included log of alanine aminotransferase, insulin resistance, waistto-height ratio, and body mass index. Independent predictors of fibrosis grade included steatosis grade, non-Hispanic black race, smoking history, and systolic blood pressure.CONCLUSION This study demonstrated a high prevalence of steatosis in the United States' adolescent population. Almost 3% of United States' adolescents had advanced fibrosis. These findings are concerning because a younger age of onset of NAFLD can lead to an earlier development of severe disease, including steatohepatitis, cirrhosis, and liver decompensation.     

Primary localized gastric amyloidosis: A scoping review of the literature from clinical presentations to prognosis

Localized gastric amyloidosis (LGA) is a rare disease characterized by abnormal extracellular deposition of amyloid protein restricted to the stomach and it is confirmed by positive results of Congo red staining. Over decades, only a few cases have been reported and studies or research focusing on it are few. Although LGA has a low incidence, patients may suffer a lot from it and require proper diagnosis and management. However, the pathology of LGA remains unknown and no overall review of LGA from its presentations to its prognosis has been published. Patients with LGA are often asymptomatic or manifest atypical symptoms, making it difficult to differentiate from other gastrointestinal diseases. Here, we report the case of a 70-year-old woman with LGA and provide an overview of case reports of LGA available to us. Based on that, we conclude current concepts of clinical manifestations, diagnosis, treatment, and prognosis of LGA, aiming at providing a detailed diagnostic procedure for clinicians and promoting the guidelines of LGA. In addition, a few advanced technologies applied in amyloidosis are also discussed in this review, aiming at providing clinicians with a reference of diagnostic process. With this review, we hope to raise awareness of LGA among the public and clinicians.     

胃肠道间质瘤的MSCT表现与病理危险程度分析

目的研究胃肠道间质瘤的MSCT表现与病理危险程度分级的关系。方法此项研究对象为医院2014年1月—2018年12月经过手术、病理等确诊为胃肠道间质瘤的患者,共计50例,对其MSCT表现进行回顾分析,评估肿瘤最大径、生长方式等和病理危险程度分级关系。结果50例胃肠道间质瘤患者中,胃部18例,胃肠道外5例,肠道27例;病理分级中低度危险7例,中度危险8例,重度危险35例。不同危险程度肿瘤出现的位置和强化情况差异无统计学意义(P>0.05),肿瘤生长方式、形态、转移情况等对比差异有统计学意义(P<0.05)。结论胃肠道间质瘤的MSCT表现有特性,和病理危险程度分级密不可分,对治疗、确定预后等有积极影响。     

气不摄血证免疫性血小板减少症患者血管活性物质及相关炎症因子变化与临床意义

目的 本研究旨在探讨气不摄血证免疫性血小板减少症(ITP)患者血管活性物质及相关炎症因子在ITP发病中的作用及其临床意义。方法 气不摄血证ITP患者30例（ITP组），根据2016版ITP出血评分量表,分为未出血组、低危组（≤2分）及高危组（＞2分），健康正常人20例（对照组）。酶联免疫吸附（ELISA）法检测外周血血管活性物质一氧化氮(NO)、一氧化氮合成酶（NOS）及内皮素-1（ET-1）含量，AimPlex流式高通量技术检测外周血血管活性物质VEGF-A,VEGF-D及相关炎症因子IL-8,IL-10,IL-17A以及TNF-α含量。结果 与对照组相比较，气不摄血证ITP患者NOS、VEGF-A及IL-10含量显著降低（P＜0.05)，ET-1、IL-8、IL-17A以及TNF-α含量显著升高（P＜0.05)。同时，气不摄血证ITP患者中，高危组ET-1含量显著高于未出血组（P＜0.05），ET-1、VEGF-A含量与气不摄血证ITP患者出血显著相关（OR=1.012,95%CI:0.92-1.31；OR=1.065, CI:0.98-1.22,P＜0.05)。结论 血管活性物质及相关炎症因子在气不摄血证ITP患者的发病过程中具有重要作用，ET-1、VEGF-A可能是反应气不摄血证ITP患者出血风险的重要客观指标。