Herpes simplex virus entry is associated with tyrosine phosphorylation of cellular proteins

The initial step in herpes simplex virus (HSV) entry is binding of virion glycoprotein (g)C and/or gB to cell surface heparan sulfate. After this initial attachment, gD interacts with cell surface receptor or receptors, and the virion envelope fuses with the cell membrane. Fusion requires viral glycoproteins gB, gD, gL, and gH, but the cellular factors that participate in or the pathways activated by viral entry have not been defined. To determine whether signal transduction pathways are triggered by viral-cell fusion, we examined the association of viral entry with tyrosine phosphorylation of cellular proteins. Using immunoprecipitation and Western blotting, we found that at least three cytoplasmic host cell proteins, designated p80, p104, and p140, become tyrosine phosphorylated within 5-10 min after exposure to HSV-1 or HSV-2. However, no phosphorylation is detected when cells are exposed to a mutant virus deleted in gL that binds but fails to penetrate. Phosphorylation is restored when the gL-deletion virus is grown on a complementing cell line. Viral entry and the phosphorylation of p80, p104, and p140 are inhibited when cells are infected with virus in the presence of protein tyrosine kinase inhibitors. Taken together, these studies suggest that tyrosine phosphorylation of host cellular proteins is triggered by viral entry.     

静脉溶栓治疗对AMI患者左室重构的影响

目的 观察静脉溶栓治疗对ＡＭＩ患者左室重构的影响。方法 选择确诊为ＡＭＩ并经静脉溶栓治疗患者８２例,按临床非侵入性冠脉再通四项指标判定,８２例中再通４８例（再通组）未通３４例（未通组）。于梗塞后４～６周,平均５．４周行心脏彩色多普勒超声检理,测量左室舒张末期内径（ＬＶ）,左室射血分数（ＥＦ）,左室短轴缩短率（ＦＳ）,舒和早期峰值轿流速度／舒张晚期峰值血流速度（Ｅ／Ａ）,血流经过二尖瓣口的降速率（Ｄ     

高效液相色谱法测定地黄中腺苷含量

目的:建立地黄中腺苷含量的测定方法,测定不同品种地黄中腺苷的含量。方法:采用高效液相色谱法测定地黄中腺苷含量。以KYWG-C₁₈为固定相,6%乙腈为流动相,检测波长为260nm。结果:腺苷在0.002mg/ml～0.01mg/ml线性良好。回归方程为Y=1.7742×10-4+8.9021×10-7X,r=0.9995。平均回收率为94.1%。RSD=1.86%(n=5)。结论:本法简便、快速、结果可靠。     

Clinicopathologic features and clinical outcomes of intravenous leiomyomatosis of the uterus: A case series

Rationale:Intravenous leiomyomatosis (IVL) is a rare and special type of smooth muscle tumor originating in the uterus. It is classified as a benign disease according to its histological features but shows the behavioral characteristics of a malignant tumor. It is easily misdiagnosed and recurrent. The purpose of this study was to retrospectively analyze clinicopathological data of 25 cases of IVL in order to enhance clinicians’ understanding of this rare disease.Patient concerns:We screened and identified 25 cases of IVL at our hospital from October 2013 to January 2020. Five patients had tumors.Diagnoses:The diagnosis in each case was pathologically confirmed after surgical treatment.Interventions:All patients were managed surgically. Although the surgical procedures were different, the surgical approach was geared towards achieving complete excision. Three patients received hormonal therapy with gonadotropinreleasing hormone agonists after surgery.Outcomes:We retrospectively reviewed all medical records and analyzed the clinicopathologic features and clinical outcomes of this disease as well as the correlations between the clinical features and risk of recurrence. Neither the symptoms nor the preoperative imaging results were suggestive of IVL in any of the cases. Except for two patients who were lost to follow-up, twenty-three patients who were followed up are still alive. Three patients experienced a recurrence.Lessons:The clinical manifestations and ultrasound images of IVL in the early stages are not typical; thus, IVL is easily misdiagnosed as uterine leiomyoma. Radiologists, pathologists, and surgeons should have a thorough understanding of IVL and a high index of vigilance for IVL in clinical practice. Surgery should always be aimed at achieving complete tumor excision. Patients with large lesions (≥7 cm) and lesions extending to the broad ligament may have an increased risk of recurrence. Early detection, diagnosis, and treatment are very important; once the diagnosis is confirmed, regular follow-ups are crucial.     

虾青素抑制氧化应激改善陈旧红细胞保存质量

目的:观察虾青素能否抑制陈旧悬浮红细胞内的氧化应激,改善红细胞保存质量。方法:采集志愿者血液,制备去白悬浮红细胞,将其随机分为4组,对照组加入DMSO,另外3组悬浮红细胞的保存液内加入抗氧化剂虾青素使其终浓度分别为5、10和20μmol/L,悬浮红细胞于2℃~6℃内保存。保存至28 d、42 d采用倒置荧光显微镜观察悬浮红细胞内活性氧族的表达状况,采用荧光酶标仪测定红细胞内活性氧族的含量,采用硫代巴比妥酸比色法测定红细胞内丙二醛含量,扫描电镜观察红细胞的超微结构,采用化学比色法测定三磷酸腺苷含量,采用紫外测试法测定2,3-二磷酸甘油酸含量。结果:与各自对照组相比,加虾青素的三组储存28 d和42 d悬浮红细胞内活性氧族和丙二醛含量降低,三磷酸腺苷和2,3-二磷酸甘油酸水平升高,改善了红细胞的形态。结论:虾青素可以通过降低储存悬浮红细胞内的氧化应激水平改善红细胞保存质量。     

妊娠合并宫颈癌的诊治进展

宫颈癌是妊娠期妇女第3大常见恶性肿瘤,仅次于恶性黑色素瘤和乳腺癌。妊娠合并宫颈癌的处理,应在治疗患者肿瘤本身及维护母儿健康之间取得平衡,这给临床医师带来极大挑战。目前全球范围内的妊娠合并宫颈癌治疗共识及指南,均以小样本回顾性研究及专家共识为基础制定,缺乏可靠的循证医学证据,在治疗方案上也存在分歧,迄今对该病尚无统一的治疗方案。笔者拟就妊娠合并宫颈癌的诊疗进展进行探讨,以期为临床决策提供可供参考的依据。     

过氧化物还原酶I-硫氧还蛋白、超氧化物歧化酶及过氧化氢酶在大鼠肝脏缺血再灌注损伤中的表达变化

目的 观察过氧化物还原酶I-硫氧还蛋白(PrxI-Trx)、超氧化物歧化酶(SOD)及过氧化氢酶(CAT)抗氧化体系在大鼠肝脏缺血再灌注损伤模型中的表达变化,探讨其在抗氧化应激反应中的作用。方法 通过无损伤血管夹钳夹通往大鼠肝左叶、肝中叶的血管和胆管蒂,30 min后松
开血管夹,制造大鼠70%肝脏缺血再灌注损伤模型。损伤再灌注6h后取血和肝脏。全自动生化分析仪测丙氨酸氨基转移酶（ALT）含量。HE法观察大鼠肝脏形态学改变。采用RT-PCR的方法观察在肝脏缺血再灌注损伤中PrxI-Trx、SOD、CAT氧化还原体系mRNA水平的表达变化。采用Western
blotting测定PrxI、SOD和CAT的蛋白表达水平。结果 与对照组相比,血清中ALT水平和HE结果均显示肝脏缺血再灌注损伤组大鼠肝细胞明显受损。PrxI-Trx、SOD和CAT的mRNA水平明显升高。同时,PrxI、SOD和CAT的蛋白表达水平也明显升高。结论 PrxI-Trx、SOD和CAT在肝脏缺血再灌
注损伤中均发挥了抗氧化应激作用,对肝细胞具有保护作用。     

泸州市基层疾病预防控制机构人力结构现状分析

目的：：了解泸州市基层疾病预防控制机构人力结构现状,为建立合理的疾病预防控制机构人才队伍提供依据。方法：采用全市普查的方法,应用问卷对泸州市基层疾病预防控制中心人员结构进行调查。结果：泸州市基层疾病预防控制机构在编人数266人、占84.98%;以初级职称(69.82%)与中级职称(25.68%)为主,叙永县无高级职称人员;除江阳区与龙马潭区疾病预防控制中心人员女性比例大于男性外,其余地区男性所占比例均高于女性;江阳区、纳溪区和叙永县疾病预防控制中心40岁以上的人员比例分别为52.43%、52.78%、85.96%,泸县疾病预防控制中心35岁以下人员占50.00%;泸州市各区县疾病预防控制中心人员学历均以本科(37.28%)、大专(41.94%)为主;专业以预防医学(20.43%)和临床医学专业(24.73%)为主,检验专业、其他医学专业和卫生事业管理专业人员比例分别为15.77%、13.98%、7.53%。结论：泸州市基层疾病预防控制机构人员编制不足,缺乏高职称人员,年龄结构不合理,高等学历人才匮乏,专业结构单一,个别县或区情况较严重。     

Expression of HMGB1/RAGE protein in renal carcinoma and its clinical significance

Objective: To investigate the expression of high mobility group protein B1 (HMGB1) and its receptor, receptor for advanced glycation end-product (RAGE), in renal cancer tissue and surrounding normal tissue and to analyze the relationship between the expression level of the protein and receptor as well as the clinical pathological characteristics and prognosis in renal cancer patients. Methods: A total of 80 renal carcinoma patients who were surgically treated in our hospital from February 2004 to December 2012 were included in this study. Normal paratumoral tissues were collected as a control. All diagnoses were confirmed with a postoperative pathological examination. All patients had complete pathological data. The expression of HMGB1/RAGE proteins in renal cancer tissue and paratumoral tissue was examined using immunohistochemical methods. Results: The positive expression rate of HMGB1 was 71% in renal cancer tissue, which was significantly higher than that in the paratumoral normal tissue (25%). The positive expression rate of RAGE was 72% in renal cancer tissue, which was significantly higher than that in the paratumoral normal tissue (27%). Further analysis did not indicate a correlation between the positive expression of HMGB1 and RAGE proteins and gender, age and tumor size (P > 0.05), whereas the expression patterns were shown to correlate with tumor differentiation, clinical stage and lymph node metastasis (P < 0.05). The expression of HMGB1 exhibited a significant positive correlation with RAGE level (P < 0.05), the expression of HMGB1/RAGE proteins exhibited a negative correlation with the prognosis of patients, and the five-year survival rate of patients with positive expression was significantly lower than that of patients with negative expression (P < 0.05). Conclusion: HMGB1/RAGE exhibited significantly elevated expression in renal cancer tissues that was closely related to the clinical prognosis of patients; thus, the expression levels may become a new target in the treatment of renal carcinoma.