Epstein‐Barr virus‐encoded latent membrane protein 1 promotes extracellular vesicle secretion through syndecan‐2 and synaptotagmin‐like‐4 in nasopharyngeal carcinoma cells

Increasing evidence indicates that extracellular vesicles (EVs) play an important role in cancer cell‐to‐cell communication. The Epstein‐Barr virus (EBV)‐encoded latent membrane protein 1 (LMP1), which is closely associated with nasopharyngeal carcinoma (NPC) pathogenesis, can trigger multiple cell signaling pathways that affect cell progression. Several reports have shown that LMP1 promotes EV secretion, and LMP1 trafficking by EVs can enhances cancer progression and metastasis. However, the molecular mechanism by which LMP1 promotes EV secretion is not well understood. In the present study, we found that LMP1 promotes EV secretion by upregulated syndecan‐2 (SDC2) and synaptotagmin‐like‐4 (SYTL4) through nuclear factor (NF)‐κB signaling in NPC cells. Further study indicated that SDC2 interacted with syntenin, which promoted the formation of the EVs, and SYTL4 is associated with the release of EVs. Moreover, we found that stimulation of EV secretion by LMP1 can enhance the proliferation and invasion ability of recipient NPC cells and tumor growth in vivo. In summary, we found a new mechanism by which LMP1 upregulates SDC2 and SYTL4 through NF‐κB signaling to promote EV secretion, and further enhance cancer progression of NPC.     

Cytogenetic and molecular landscape and its potential clinical significance in Hispanic CMML patients from Puerto Rico

Chronic myelomonocytic leukemia (CMML) is a clonal hematopoietic neoplasm that exhibits myelodysplastic and myeloproliferative characteristics with heterogeneous clinical and pathological features. There are limited publications on the ethnic and racial disparity of cytogenetics and genomics in CMML patients. This study aims to define the cytogenetic and molecular landscape in Hispanic CMML patients from Puerto Rico and explore its possible clinical significance. One hundred and eleven (111) Hispanic CMML patients from Puerto Rico were diagnosed in our institute from 2009 to 2018. Karyotypes were available in one hundred and seven (107) patients. Seventeen (17) patients had abnormal karyotypes (17/107, 16%). Compared to previously published data, Hispanic CMML patients in this study had significantly lower rates of overall cytogenetic abnormalities (16% vs 27–28%, p < 0.05) and trisomy 8 (2% vs 7%, p < 0.05). Among one hundred and eleven (111) Hispanic CMML patients, 40-gene myeloid molecular profile tests were performed in fifty-six (56) CMML patients. Gene mutations were identified in fifty-four (54) patients (96%). The most frequent mutated genes were: TET2, SRSF2, ASXL1, ZRSR2, DNMT3A, NRAS, CBL, and RUNX1. Twenty-nine (29) out of fifty-six (56) patients (29/56, 52%) had mutated TET2/wild type ASXL1 (muTET2/wtASXL1). Previous studies indicated that mutated ASXL1, DNMT3A, NRAS, RUNX1, and SETBP1 may associate with an unfavorable prognosis and muTET2/wtASXL1 may associate with a favorable prognosis in CMML patients. Compared to previously published data, Hispanic CMML patients from Puerto Rico in this study had significantly lower mutation rates in ASXL1 and SETBP1, and a higher rate of muTET2/wtASXL1. The findings raise the possibility of a favorable prognosis in Hispanic CMML patients.     

医院后勤信息化管理系统设计与实现

在分析医院成本管理与核算现状的基础上,搭建后勤信息化管理系统,介绍系统的特性、主要功能及其优势,该系统可以在很大程度上降低后勤管理人员的劳动强度,实施成本控制,提高医院后勤保障的服务水平。     

A Modified Fibronectin Type III Domain-Conjugated,Long-Acting Pan-Coronavirus Fusion Inhibitor with Extended Half-Life

The coronavirus disease 2019 (COVID-19) pandemic caused by infection of SARS-CoV-2 and its variants has posed serious threats to global public health, thus calling for the development of potent and broad-spectrum antivirals. We previously designed and developed a peptide-based pan-coronavirus (CoV) fusion inhibitor, EK1, which is effective against all human CoVs (HCoV) tested by targeting the HCoV S protein HR1 domain. However, its relatively short half-life may limit its clinical use. Therefore, we designed, constructed, and expressed a recombinant protein, FL-EK1, which consists of a modified fibronectin type III domain (FN3) with albumin-binding capacity, a flexible linker, and EK1. As with EK1, we found that FL-EK1 could also effectively inhibit infection of SARS-CoV-2 and its variants, as well as HCoV-OC43. Furthermore, it protected mice from infection by the SARS-CoV-2 Delta variant and HCoV-OC43. Importantly, the half-life of FL-EK1 (30 h) is about 15.7-fold longer than that of EK1 (1.8 h). These results suggest that FL-EK1 is a promising candidate for the development of a pan-CoV fusion inhibitor-based long-acting antiviral drug for preventing and treating infection by current and future SARS-CoV-2 variants, as well as other HCoVs.     

多囊卵巢综合征的中西医结合治疗研究概况

从中医辨证分型、中药人工周期、针灸与中西医结合治疗多囊卵巢综合征的研究现状进行了综述,具有一定的临床指导作用.     

肱动脉内皮功能、颈动脉内膜-中层厚度及踝臂指数与冠心病的相关性研究

目的 探讨肱动脉内皮依赖性舒张功能(EDD)、颈动脉内膜-中层厚度(IMTc)及踝臂指数(ABI)与冠心病的相关性研究.方法 选择中老年对照组41例,心绞痛组38例,心肌梗死(心梗)组40例,使用彩色多普勒超声仪检测肱动脉在静息、反应性充血后舒张末内径的变化,并测量IMTc,用普通血压计分别测量并计算三组踝臂指数,同时采集患者血液生化、心电图、病史、超声及冠脉造影等各项指标.结果 EDD%:心梗组、心绞痛组、对照组呈递增趋势(P<0.05),IMTc:心梗组、心绞痛组、对照组呈递减趋势(P<0.05),ABI＜0.9的百分率:心梗组、心绞痛组、对照组呈递减趋势(P<0.05).结论 EDD、IMTc、ABI与冠心病缺血的严重程度有一定的相关性.     

转化生长因子-β3与纤维连接蛋白在子宫肌瘤及子宫肌层内的表达水平与生物学意义

目的:探讨转化生长因子(TGF)-β3与纤维连接蛋白(FN)在绝经或未绝经妇女子宫肌瘤及子宫肌层中表达的水平变化及其意义。方法:采用免疫组化法(SP)检测40例绝经后子宫肌瘤妇女(绝经组)、40例未绝经子宫肌瘤妇女(未绝经组)肌瘤组织及肌壁组织中的TGF-β3、FN的表达差异,同时将绝经组妇女根据肌瘤是否发生萎缩分为萎缩组(17例)、未萎缩组(23例)并进行上述指标的比较。结果:绝经组的肌瘤组织、肌壁组织中的TGF-β3表达评分分别为(3.11±0.78)分、(1.85±0.69)分均显著的低于未绝经妇女的(3.98±0.67)分、(2.31±0.82)分(P0.05);两组妇女肌瘤组织和肌壁组织中的FN表达评分差异不显著(P0.05)。子宫肌瘤萎缩和未萎缩患者的子宫肌瘤组织、肌壁组织中TGF-β3、FN表达在两组间差异均不显著(P0.05),萎缩组和未萎缩组的肌瘤组织TGF-β3表达分别为(2.90±0.65)分、(3.32±0.74)分均显著的高于本组肌壁组织中的(1.85±0.67)分、(2.25±0.61)分(P0.05);两组肌瘤和肌壁组织中的FN表达差异不显著(P0.05)。结论:TGF-β3表达可能与患者绝经前后的激素水平改变有关。     

毛乳头诱导毛囊形成和毛发生长信号通路的研究进展

毛乳头是位于毛囊底部的特殊成纤维细胞团块,在毛囊的周期性生长中,毛乳头细胞与周围细胞相互作用而发挥重要功能,被认为是控制毛囊形成和毛发生长信号传导的中心.近年来的研究表明,许多信号通路,包括Wnt、骨形成蛋白、Shh、Notch、成纤维细胞生长因子等信号通路,在毛乳头控制毛囊形成和毛发生长的机制中起作用.可以通过这些信号通路,促进体外培养毛乳头细胞的增殖、加强体外培养毛乳头细胞诱导毛发生长的能力,从而建立一种毛发重构技术用于临床治疗.