一株产生EB病毒的绒猴淋巴细胞株的建立

用Ｂ９５－８细胞株产生的ＥＢ病毒，转化棉顶绒猴外周血淋巴细胞，获得ＫＭＴ３细胞株。该细胞株能产生高滴度的ＥＢ病毒。含ＥＢ病毒衣壳抗原的自然阳性细胞率为３￣５％，激活后达５０￣６０％，其培养上清液可直接转化人淋巴细胞得到传代细胞系。ＫＭＴ３细胞染色体数２ｎ＝４６条。     

Epstein—Barr病毒膜抗原基因免疫的研究

将Ｅｐｓｔｅｉｎ－Ｂａｒｒ病毒（ＥＢＶ）膜抗原（ＭＡ）ＢＬＬＦ１基因,插入含有ＣＭＶ启动子的真核表达载体ｐｃＤＮＡ３下游ＢａｍＨＩ位点,构建成真核表达质粒ｐｃＤＮＡ３－ＭＡ。将纯化的ＤＮＡ注射Ｂａｌｂ／ｃ小鼠股四头肌。经免疫的动物产生抗ＥＢ病毒ＭＡ特异性的抗体和中和抗体,依赖抗体细胞介导的细胞毒作用（ＡＤＣＣ）,特异性Ｔ淋巴细胞增生性反应及细胞毒性Ｔ淋巴细胞（ＣＴＬ）杀伤作用。基因免疫与基因－蛋白     

Epstein-Barr病毒膜抗原基因免疫的研究

将Ｅｐｓｔｅｉｎ－Ｂａｒ病毒（ＥＢＶ）膜抗原（ＭＡ）ＢＬＬＦ１基因,插入含有ＣＭＶ启动子的真核表达载体ｐｃＤＮＡ３下游ＢａｍＨＩ位点,构建成真核表达质粒ｐｃＤＮＡ３－ＭＡ。将纯化的ＤＮＡ注射Ｂａｌｂ／ｃ小鼠股四头肌。经免疫的动物产生抗ＥＢ病毒ＭＡ特异性的抗体和中和抗体,依赖抗体细胞介导的细胞毒作用（ＡＤＣＣ）,特异性Ｔ淋巴细胞增生性反应及细胞毒性Ｔ淋巴细胞（ＣＴＬ）杀伤作用。基因免疫与基因－蛋白联合免疫效果相似。不同启动子控制下的ＭＡ基因,诱发小鼠免疫应答无明显差异。     

对鼻咽癌恶性转化基因Tx表达的初步研究

运用杂交组化及Ｎｏｒｔｈｅｒｎ法,对中国人鼻咽癌细胞株恶性转化基因Ｔｘ的表达进行了初步研究。结果表明该基因在鼻咽癌细胞株中表达１．３ｋｂｍＲＮＡ,但表达强度较低,在ＨＰＶ阳性或阴性人宫颈癌细胞中均无表达,ＥＢＶ阴性的Ｂ淋巴细胞系及ＨＴＬＶ－１阳性的Ｔ细胞系中为阴性,而在ＥＢＶ阳性的Ｂ９５－８及Ｒａｊｉ细胞中Ｔｘ基因表达强烈,从而提示ＨＰＶ及ＨＴＬＶ－１不增强Ｔｘ的表达水平,而ＥＢＶ可能使Ｔｘ基因活化．这为进一步研究ＥＢＶ与Ｔｘ等瘤基因协同作用提供了新的依据。     

EB病毒与促癌物协同作用诱发人鼻咽恶性淋巴瘤和未分化癌的研究

将ＥＢ病毒感染的人胎儿鼻咽粘膜移植于２２只Ｂａｌｂ／ｃ裸鼠皮下,每周一次皮下注射丁酸和佛波醇二酯（ＴＰＡ）,约１０天后肿物逐渐增大,１５周内行病理学检查,诊断为恶性淋巴瘤４例（其中Ｔ淋巴细胞型３例）,未分化癌３例,ＰＣＲ和原位杂交显示,两种肿瘤组织和细胞中均含有ＥＢ病毒ＬＭＰ１基因,核苷酸序列分析表明,与Ｂ９５－８细胞ＬＭＰ１基因相应序列的同源性约为９６％和９９％,说明ＥＢ病毒感染人胎儿新鲜鼻咽上     

中国疫苗株鸡痘病毒插入载体的构建与MDV糖蛋白B的表达

在对中国鸡痘病毒疫苗株２８２Ｅ４基因组ＤＮＡ进行克隆与亚克隆的基础上,进一步插入Ｐ１１－ＬａｃＺ标记基因,根据蓝斑选择原理筛选出３个病毒在细胞培养物上生长所不必需的片段,为了便于外源基因的插入,特将Ｐ７．５－Ｐ１１－ＬａｃＺ基因框转移至ＢＬＵＥＳＣＲＩＰＴＳＫＭ１３－的Ａｐａｌ将ＭＣＳ－Ｐ７．５－Ｐ１１－ＬａｃＺ框切下,置入一个亚克隆的非必需片段中,构建成中国鸡痘病毒插入载体ｐＦＧ１１７５－１,以     

用核酸免疫技术制备抗丙肝病毒C区单克隆抗体

用丙肝病毒Ｃ＋Ｅ１区真核表达质粒ｐｃＤＮＡ－ＨＣＶ／Ｃ＋Ｅ１按４００ｕｇ／只剂量免疫ＢＡＬＢ／Ｃ小鼠,１４周后同一剂量再加强免疫一次。加强免疫后２周,在５０％ＰＥＧ１４５０介导下将脾细胞与ＳＰ２／０小鼠骨髓瘤细胞（５１）融合。实验结果融合率达５４．３％（３１３／５７６）。阳性率为５．４％（１７”３１３）。克隆化后得到６株稳定分泌抗丙肝病毒Ｃ区单克隆抗体杂交瘤细胞株。这６株杂交瘤均产生ＩｇＭ抗体,接种ＢＡＬＢ／Ｃ小鼠后产生腹水的效价为１６４－１３２０（ＥＬＩＳＡ）。     

快速检测支气管肺泡灌洗液T细胞的研究

目的建立一种简便、快速检测支气管肺泡灌洗液（ＢＡＬＦ）中Ｔ淋巴细胞总数的方法。方法用改良的α－醋酸萘酯酶（ＡＮＡＥ）染色法鉴别和计数ＢＡＬＦ中Ｔ淋巴细胞。用本法共检测２２７例大鼠ＢＡＬＦ,并采用两样本均数比较的ｔ检验分析３批动物实验的测定结果。结果大鼠ＢＡＬＦ细胞涂片ＡＮＡＥ染色效果满意,Ｔ淋巴细胞容易鉴别。测得１１０只正常大鼠ＢＡＬＦ中Ｔ淋巴细胞比值的正常值为（６９．３６±１１．４７）％。各个实验组与相应对照组比较,ＢＡＬＦ中Ｔ淋巴细胞比值均出现不同程度的变化。结论本方法简便易行,能准确地显示ＢＡＬＦ中Ｔ淋巴细胞数值的变化。本研究是国内首次报道,为实验和临床研究肺局部细胞免疫状况提供了一种简便的方法及其应用的实验依据。     

建立海南黎族永生细胞库

采用ＥＢ病毒转化外周血Ｂ淋巴细胞加环胞霉素Ａ 法,建立了含５４ 株海南黎族永生细胞库（男性５６％ ,女性４４％ ）,有亲缘关系者占１３％ 。供血者身体健康,三代无与其他民族或支系通婚史。     

小鼠艾滋病模型的建立及用鹿肠道病毒治疗的实验研究

用小鼠白血病病毒ＬＰ－ＢＭ５ＭｕＬＶ接种新生ＢＡＬＢ／Ｃ小鼠,感染后４～６个月可出现与人类ＡＩＤＳ极为相似的病理变化和免疫缺陷的症状,包括血免疫球蛋白增高、淋巴结肿大、Ｔ辅助淋巴细胞减少和淋巴细胞转化功能降低等。通常作为小鼠获得性免疫缺陷综合症即小鼠艾滋病（ＭＡＩＤＳ）的模型使用。本实验采用已证实具有溶瘤作用的鹿肠道病毒ＥＣＣＯ－１８株对小鼠艾滋病进行实验性治疗,结果表明鹿肠道病毒ＥＣＣＯ－１８可明显缓解艾滋病小鼠的淋巴结肿大和延长艾滋病小鼠的生存时间。提示鹿肠道病毒ＥＣＣＯ－１８治疗小鼠艾滋病有效。     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.