Engulfment of mast cell secretory granules on skin inflammation boosts dendritic cell migration and priming efficiency

1. Download : Download high-res image (228KB)
2. Download : Download full-size image

     

STAT3 couples with 14-3-3σ to regulate BCR signaling,B-cell differentiation,and IgE production

1. Download : Download high-res image (205KB)
2. Download : Download full-size image

     

Mucosal bromodomain-containing protein 4 mediates aeroallergen-induced inflammation and remodeling

1. Download high-res image (248KB)
2. Download full-size image

     

Dual function of Langerhans cells in skin TSLP-promoted TFH differentiation in mouse atopic dermatitis

1. Download : Download high-res image (187KB)
2. Download : Download full-size image

     

Staphylococcus epidermidis protease EcpA can be a deleterious component of the skin microbiome in atopic dermatitis

1. Download : Download high-res image (400KB)
2. Download : Download full-size image

     

Mast cell–derived IL-13 downregulates IL-12 production by skin dendritic cells to inhibit the TH1 cell response to cutaneous antigen exposure

1. Download : Download high-res image (242KB)
2. Download : Download full-size image

     

2019年辽宁省水痘-带状疱疹病毒基因特征分析

目的:分析2019年辽宁省收集到的水痘-带状疱疹病毒(VZV)基因特征。方法:采集辽宁省2019年疑似水痘或带状疱疹患者的疱疹液样本共32份。采用实时荧光定量聚合酶链反应筛查疑似样本,通过检测分析阳性样本的三个开放阅读框(ORF)即ORF22、ORF38和ORF62上的单核苷酸多态性(SNP)位点,整理样本及序列资料并...     

野生型胃肠道间质瘤的研究进展

胃肠道间质瘤(GIST)是最常见的消化道间叶组织来源肿瘤,约10%的GIST患者分子检测无KIT/PDGFRA基因突变,称为野生型GIST。根据是否有琥珀酸脱氢酶B(SDHB)表达缺失,野生型GIST可分为SDH缺陷型和非SDH缺陷型,SDH缺陷型包括无综合征相关性、Carney三联征相关性及Carney-stratakis综合征相关性GIST;非SDH缺陷型包括BRAF突变、Ⅰ型神经纤维瘤病相关性、K/N-RAS突变及四重野生型GIST等。野生型GIST的发生发展、临床病理特征和治疗原则均与KIT或PDGFRA突变的GIST有较大差异。本文就野生型GIST的分子机制和临床诊疗进展做一综述。     

Construction and expression of eukaryotic plasmids containing lamivudine-resistant or wild-type strains of Hepatitis B Virus genotype C

AIM： To construct eukaryotic expression plasmids of full-length Hepatitis B Virus （HBV） genotype C genome, which contain lamivudine-resistant mutants （YIDD, YVDD） or wild-type strain （YMDD）, and to observe the expression of HBV DNA and antigens [hepatitis B surface antigen （HBsAg） and hepatitis B e antigen （HBeAg）] of the recombinant plasmids in HepG2 cells. METHODS： Three HBV full-length genomes were amplified from the plasmids pMD18T-HBV/YIDD, pMD18T-HBV/YVDD and pMD18T-HBV/YMDD, using PCR. Three recombinant plasmids were generated by inserting each of the PCR products into the eukaryotic expression vector pcDNA3.1 （＋）, between the EcoRI and HindⅢ sites. After being characterized by restriction endonuclease digestion, and DNA sequence analysis, the recombinant plasmids were transfected into HepG2 cells. At 48 and 72 h post-transfection, the levels of intracellular viral DNA replication were detected by real-time PCR, and the expression of HBsAg and HBeAg in the cell culture supernatant was determined by ELISA.
RESULTS： Restriction endonuclease digestion and DNA sequence analysis confirmed that the three recombinant plasmids were correctly constructed. After transfecting the plasmids into HepG2 cells, high levels of intracellular viral DNA replication were observed, and HBsAg and HBeAg were secreted into the cell culture supernatant.
CONCLUSION： Eukaryotic expression plasmids pcDNA3.1 （＋）-HBV/YIDD, pcDNA3.1 （＋）-HBV/YVDD or pcDNA3.1 （＋）-HBV/YMDD, which contained HBV genotype C full-length genome, were successfully constructed. After transfection into HepG2 cells, the recombinant plasmids efficiently expressed HBV DNA, HBsAg and HBeAg. Our results provide an experimental basis for the further study of HBV lamivudine-resistant mutants.