广西人体重要寄生虫病现状调查

目的了解广西人体重要寄生虫病的流行现状和流行因素。方法按照全国人体重要寄生虫病现状调查的抽样方法进行抽样;粪便虫卵检查采用改良加藤厚涂片法、蛲虫卵检查采用透明胶纸拭肛法,血清学检查采用ELISA方法,并进行绦/囊虫病问卷调查。结果土源性线虫（钩、蛔、鞭、蛲）、华支睾吸虫总感染率为44.23%,检出7种虫种;其中,钩虫、蛔虫、鞭虫、蛲虫、华支睾吸虫感染率分别为18.52%、23.25%、11.37%、19.85%和3.71%。桂东、桂南地区总感染率较高（59.72%、47.98%）;学生总感染率（45.69%）较其他职业人群高;瑶族人群总感染率（76.77%）较其他民族高。≤15岁组人群蛔虫感染率较高,钩虫感染率随年龄的增加而增加,鞭虫感染者主要为5～15岁儿童。绦虫病主要集中在桂北和桂中的少数民族地区,以融水县绦虫感染率最高（8.46%）。结论广西人群土源性线虫感染率与12年前比较有较大幅度下降,但仍然处于较高水平,桂东、桂南地区感染率较高;食源性寄生虫感染呈上升趋势。     

Correlation of plasma propylthiouracil levels with inhibition of thyroid hormone synthesis in the rat

The inhibition of thyroid hormone synthesis was studied in relation to plasma levels of 6-n-propyl-2-thiouracil (PTU). Na ¹²⁵I (5 μCi) was injected i.p. into adult male Sprague-Dawley rats. After 30 min, graded doses of PTU (0.2 mg/kg, 0.1 mg/kg, and 0.05 mg/kg) were similarly injected. Thyroid hormone synthesis was followed by the accumulation of radioactivity into thyroid glands, which were removed at specified time intervals. PTU levels were measured spectrophotometrically at the time of sacrifice. Additionally, PTU (³⁵S) was used to confirm blood levels of PTU and also to follow intrathyroidal PTU levels. Plasma PTU levels in excess of 0.18 μg/ml completely inhibited thyroid hormone synthesis. Levels between 0.14 and 0.09 μg/ml had a partial effect, and PTU levels less than 0.09 μg/ml had no effect on thyroid hormone synthesis.     

CLINICAL EXPERIENCES WITH HUMAN PARATHYROID HORMONE 1–34*

Human parathyroid hormone (PTH) 1–34 was given to nine normal subjects and to 10 patients with hypoparathyroidism. There were no side effects associated with the protocol employed. In normal subjects, five statistically significant changes occurred during the period of observation: plasma cyclic adenosine monophosphate (cAMP) rose by a factor of 3 (at 30 min), nephrogenous cyclic AMP rose approximately 40-fold (at 60 min), urinary phosphate rose by a factor of 2 (at 120 min), urine calcium levels fell by 50% between 60 and 120 min, and plasma prolactin rose by a factor of 1.4 (at 60 min). The cAMP responses were significantly blunted in five patients with chronic hypocalcemia, chronic hyperphosphatemia, and detectable serum immunoreactive PTH levels. On the basis of this test these patients were designated as suffering from pseudohypoparathyroidism. The acute phosphaturic and hypocalciuric responses were apparently intact in these five individuals. Human PTH 1–34 is likely to replace bovine material in the delineation of syndromes associated with PTH resistance.     

深圳市首例H5N1型人禽流感临床报告

目的探索H5N1型人禽流感病例的临床特点及诊治经验。方法一例H5N1型人禽流感患者,采用荧光定量RT-PCR评价抗病毒治疗效果,流式细胞术监测细胞免疫,即时动态的放射学检查、血气分析、生化检查监测病情变化,即时的细菌学检查监测细菌感染情况和抗生素治疗效果。采用抗病毒、禽流感恢复期血浆、机械辅助通气、糖皮质激素、免疫调节、抗生素、对症支持等综合治疗。结果患者以高热、咳嗽、呼吸困难为主要症状,临床诊断为重症病毒性肺炎,合并急性呼吸窘迫综合征(ARDS)和多脏器功能衰竭,并继发严重肺部细菌感染。联合奥司他韦和禽流感患者恢复期血浆治疗,患者体内的病毒在短期内得到有效控制和清除;机械通气、激素及其他对症支持治疗有效控制ARDS和多脏器功能衰竭;多黏菌素治疗有效控制广泛耐药的铜绿假单胞菌感染;免疫调节治疗促进患者免疫功能的恢复。结论H5N1型人禽流感病情重、进展快,严重的ARDS及多器官功能障碍综合征是主要临床特征。早期清除病毒、及时正确的对症辅助支持治疗、选择有效抗生素控制继发细菌感染是治疗成功的关键。激素和免疫调节剂的使用值得进一步探索。恢复期血浆治疗是重症禽流感治疗的有益尝试。     

Evidence for electrogenic Na+ pumping in human atrial myocardium

The resting potential of "sodium-loaded' cardiac cells can transiently hyperpolarize to levels negative to the steady state resting potential [3,5,6]. Hyperpolarization is associated with the coupled efflux of Na+ and influx of K+ driven by an active transport process and may result from an increased K+ equilibrium potential (EK), an outward pump current or both. Using conventional microelectrode techniques, we found that Na+-loaded human atrial myocardium can also transiently hyperpolarize. Na+ loading was induced by cooling to 2 degrees to 3 degrees C. Upon rewarming to 37 degrees C in a 20 mM K+ solution, the resting potential transiently hyperpolarized to levels at least 11 mV negative to the calculated EK and 29 +/- 2 mV (mean +/- S.E.) negative to the steady state level (- 33 +/- 2 mV) recorded some 15-20 minutes later. An increase in K+ conductance induced by acetylcholine exposure [2,7,10] during the transient hyperpolarization caused a depolarization, indicating that the resting potential was indeed negative to EK. These findings cannot be explained by either conductance changes or electroneutral Na+ pumping and concomitant extracellular K+ depletion. We conclude that the Na+-loaded human atrium can generate net pump current.     

雷公藤红素对人肺癌A549细胞增殖活性及能量代谢的影响

目的 探究雷公藤红素对人肺癌细胞（A549）的增殖活性以及能量代谢的影响。方法 噻唑蓝(MTT)法和生长曲线检测雷公藤红素对细胞的增殖抑制情况;HE染色观察细胞形态变化;分光光度法测定糖酵解途径中己糖激酶（HK）、丙酮酸激酶（PK）、乳酸脱氢酶（LDH）活力和三羧酸循环中琥珀酸脱氢酶（SDH）活力及能量代谢终产物ATP的含量。结果 雷公藤红素对A549细胞有增殖抑制作用,浓度在2 μg?mL^-1时,对A549细胞的抑制率达到62.71%,远远大于阳性药组5-FU的抑制率;生长曲线结果显示,雷公藤红素作用第4天细胞浓度最低,第6天细胞抑制程度最明显;HE结果表明雷公藤红素处理48 h后,细胞形态变圆,体积缩小,核深染且颜色变深;试剂盒检测结果显示,雷公藤红素非常显著的降低乳酸脱氢酶酶活力（P<0.01）,显著降低琥珀酸脱氢酶活力和ATP含量均显著降低(P<0.05),但对己糖激酶和丙酮酸激酶无明显作用。结论 雷公藤红素能够显著降低人肺癌A549细胞中乳酸脱氢酶和琥珀酸脱氢酶的活力,干扰能量代谢,抑制能量ATP生成,达到抑制A549细胞增殖的作用。     

HPV联合TCT检查应用于宫颈癌筛查的临床效果

目的观察HPV联合TCT检查应用于宫颈癌筛查的临床效果。方法选择2018年1-10月于北京市昌平区医院妇科门诊实施宫颈癌筛查的妇女400例为研究对象,均接受病理检查和HPV、TCT检查,比较联合检查与单独检查的应用价值。结果HPV联合TCT检查的阳性率高于单独检查,但差异无统计学意义(P>0.05);HPV联合TCT检查的灵敏度、阴性预测值、诊断准确率均高于单独检查(P<0.05)。结论HPV联合TCT检查用于宫颈癌筛查的价值较高,值得临床推广应用。     

The immunoregulatory and neuroprotective effects of human adipose derived stem cells overexpressing IL-11 and IL-13 in the experimental autoimmune encephalomyelitis mice

Multiple sclerosis (MS) is an inflammatory demyelination disease in the central nervous system (CNS) characterized by incomplete endogenous remyelination in the chronic phase. A shift of the balance between pro and anti-inflammatory cytokines is one of the important markers in the pathogenesis of MS. This study aimed to evaluate the effects of human adipose derived stem cells (hADSCs) overexpressing interleukin 11 and interleukin 13 (IL-11, 13-hADSCs) on the experimental autoimmune encephalomyelitis (EAE), an animal model of MS. 12 days after immunization of C57Bl/6 female mice with MOG35-55 and initial clinical symptoms appearance, the IL-11, 13-hADSCs were injected via the tail vein into the EAE mice. Then, the mice were sacrificed at 30 days post-immunization (DPI) and the spinal cords of experimental groups were extracted for histopathological and real-time RT-PCR studies. The results indicated that the clinical scores and mononuclear cells infiltration into the spinal cords of EAE mice were significantly reduced in mice treated with IL-11, 13-hADSCs. Likewise, the remyelination and oligodendrogenesis were significantly enhanced in the mentioned treatment group. Real-time results demonstrated that pro/anti-inflammatory cytokine genes expression was reversed in IL-11, 13-hADSCs treatment group in comparison to the untreated EAE group. Expression of IL-11 as a neurotrophic cytokine and IL-13 as an anti-inflammatory cytokine by hADSCs could increase the immunomodulatory and neuroprotective effects of hADSCs and be a powerful candidate in stem cell therapy for future treatment of MS.     

Prognosis prediction signature of seven immune genes based on HPV status in cervical cancer

Cervical cancer (CC) has a high incidence and mortality rate, with a low 5-year survival rate, and human papillomavirus (HPV) is one of its carcinogenic risks. However, little evidence exists on the impact of HPV infection on the survival of patients with CC. In the present study, the CC cohort and immune genes were downloaded from the TCGA database and the ImmPort database, respectively. Subsequently, the Gene Set Enrichment Analysis was performed and found that HPV status was involved in multiple immune signaling pathways, which revealed that HPV infection might play critical roles in the immune response. Then seven prognostic immune genes were identified according to HPV status in CC. Using the seven immune genes, we established an immune risk score (IRS) signature and the Kaplan-Meier curve showed that high IRS was significantly correlated with poor prognosis of CC in both the training sets (HR = 2.32, 95% CI = 1.66–3.33; AUC = 0.712) and the validation sets (HR = 1.38, 95% CI = 1.02–1.85 and AUC = 0.583 in TCGA-HNSCC; HR = 2.58, 95% CI = 1.364–4.893, AUC = 0.676 in GSE44001). A nomogram of IRS combined with clinical features was established, and further analyses demonstrated that the power of the nomogram to predict the prognosis of CC was more reliable than that of a single independent factor. In conclusion, this study provided a more comprehensive understanding of the correlation between HPV and immune mechanisms as well as a novel signature that can effectively predict the prognosis of CC patients.     

新建主细胞库对水痘减毒活疫苗质量影响的分析

目的 基于细胞基质分析新建人二倍体细胞MRC-5主细胞库,并通过主细胞库变更前后所制的水痘减毒活疫苗（水痘疫苗）可比性研究,分析新建主细胞库对水痘疫苗质量和稳定性的影响。方法 对新建MRC-5主细胞库、工作细胞库和生产终末代细胞按照中国药典2015年版和企业质量标准进行抽样检定,并传代至超高代次细胞进行传代稳定性研究,对比细胞生长与细胞计数。用新建主细胞库连续试生产3批水痘疫苗并进行工艺验证,分析疫苗原液及成品的质量结果,并考察水痘病毒基因序列和产品稳定性。结果 新建主细胞库、工作细胞库及其他各代次细胞在传代过程中生长良好,细胞计数正常,检定结果均符合质量标准。试生产的水痘疫苗工艺合格,变更前后生产的疫苗水痘病毒基因序列无差异;病毒滴度均为4.0 lg噬斑形成单位（plaque-forming unit,PFU）/0.5 ml,热稳定性试验结果均为3.4 lgPFU/0.5 ml,水分含量均不高于1.5%,符合企业注册标准;质量稳定性趋势基本一致。结论  建立的人二倍体细胞MRC-5主细胞库各项检定结果合格。用新细胞库试生产的水痘疫苗质量和稳定性与变更前的一致。