A 44-year-old male complained recurrent swelling and pain in the left pre-auricular mass over 4 years, which aggravated for 4 months. Ultrasonography revealed a mixed mass echo in the left parotid gland. Computed tomography showed an enlarged parotid gland and a 1.5 cm x 0.9 cm low density shadow in the superficial lobe area with strip high-density shadow in the edge. Although the facial nerves of the patient were found adhered to the foreign body during the operation, the foreign body in parotid gland was removed surgically without any injure to them due to facial nerves protection. In conclusion, facial nerves dissection is necessary to avoid the postsurgical facial paralysis in the surgical removal of foreign bodies in parotid gland.
Adult ; Facial Nerve ; Foreign Bodies ; Humans ; Male ; Parotid Gland

Follicular dendritic sarcoma is a rare and low-grade malignant soft tissue tumors , often occurs in the lymph nodes, we report a case of tonsil follicular dendritic sarcoma which occured after Non-Hodgkin's lymphoma had be cured. The chief complaint was oropharyngeal foreign body sensation with hemoptysis three years, found in the left neck mass increased with more than 4 months. The left side of the pharyngeal wall thickening and disappearance of parapharyngeal space with the surrounding lymph nodes extremely enlarged and integrated was demonstrated by the contrast-enhanced CT of neck. Finally,the pathological diagnosis was tonsil follicular dendritic sarcoma.
Female ; Humans ; Lymph Nodes ; pathology ; Lymphoma, Non-Hodgkin ; therapy ; Neck ; Oropharyngeal Neoplasms ; diagnostic imaging ; pathology ; Palatine Tonsil ; diagnostic imaging ; pathology ; Radiography ; Sarcoma ; diagnostic imaging ; pathology

Objective To explore in vitro effects and the mechanism for FLAG regimen compared with IA regimen in P-glycoprotein-positive and -negative acute myeloblastic leukemia(AML) cell lines. Methods The expression of P-glycoprotein in K562 and K562/A02 cells were analyzed by flow cytometry. The effects of FLAG and IA on the proliferation of K562 and K562/A02 cells were detected by MTT assay. The Ara-CTP and Ara-C levels in those cells were measured by HPLC,the gene expression of hENT1 in K562 and K562/A02 cells was detected by real-time PCR. Results The positive rates of P- glycoprotein were (1.32±0.24)% in K562 cell and (97.66±3.77)% in K562/A02 cell, respectively. The expression of P- glycoprotein had no change after treated with FLAG or IA. The cytotoxicity to K562 of IA was better than FLAG [(84.41±9.33) % v.s (73.17±13.20)%, P<0.05], and the cytotoxicity to K562/A02 of FLAG was better than IA [(70.55±11.32)% v.s (48.46±12.81)%, P<0.01]. Ara-C and Ara-CTP accumulation and hENT1 expression in AML cells treated with FLAG were higher than that treated with IA. Conclusion P-glycoprotein-positive AML cells are more sensitive to FLAG regimen than IA regimen. The biochemical modulation of Ara-CTP and Ara-C may be the major mechanism.

Objective: To study the antitussive, expectorant and antiasthetic effects of Fortunella hindsii leaves. Methods: The antitussive effects were observed by the method of ammonia-induced cough in mice, the expectorant effects were observed by the method of phenolsulfonphthalein excretion in mice, and the antiasthmatic effects were observed by the method of histamine phosphate spray in guinea pigs. Results:The leaves of Fortunella hindsii at low, medium and high doses could decrease the cough times and prolong the cough latent period (P<0. 05 or P<0. 01), high dose could promote the phenol red excretion (P<0. 05), and high and medium do-ses could prolong the incubation period of guinea pigs for asthma caused by histamine phosphate (P<0. 05 or P<0. 01). Conclu-sion:The leaves of Fortunella hindsii have promising antitussive, expectorant and antiasthmatic effects.

Objective:To develop and apply a method for real-time quantifying IL-6 mRNA.Methods:By Ficoll-Hypaque density gradient centrifugation, human peripheral blood mononuclear cells(PBMC) were isolated from whole blood treated with ethylenediaminetetraacetic acid(EDTA). Total RNA extracted from the PBMC in trizol solution was reverse transcribed to cDNA, which used as templates for fluorecent real-time quantitative PCR amplification of IL-6. PCR system consists of IL-6 primer, SBY Green Ⅰ and so on.Results:The method is wide linear range, sensitive, specific, reproducible and simple.Conclusion:The method can accurately quantify IL-6 mRNA.

BACKGROUND: Host endothelial cells are important targets of alloreactive donor cytotoxic T lymphocytes in graft-versus-host disease (GVHD). And the expression of tissue factor in vascular endothelial cells is up-regulated post-injury and activation. So tissue factor expression in vascular endothelial cells may play a pivotal role in the pathogenesis of GVHD.OBJECTIVE: To investigate the molecular mechanism of allogeneic T cell-induced tissue factor (TF) expression in vascular endothelial cells.DESIGN, TIME AND SETTING: The cytology observation was performed at immunological laboratory of ongji Medical College, Huazhong University of Science and Technology from March to October 2008.MATERIALS: Human primary umbilical vein endothelial cells (HUVECs) were purchased from Science cell laboratory (CA, USA).METHODS: Allogeneic CD4~+ and CD8~+T cells were isolated from peripheral blood mononuclear cells (PBMC) by positive selection using magnetic beads coated with anti-CD4 or anti-CD8 antibody. After thorough washing with PBS, 1×10~6 allogeneic CD4~+T cells or CD8~+T cells were added to HUVECs (ratio 10:1). The cells were grown at 37 ℃ in a humidified atmosphere containing c-jun N-terminal kinase (JNK), p38 mitogen-activated protein kinase (MAPK), extracellular signal-regulated protein kinase (ERK). HUVECs were pretreated with TF antibody 1 hour before co-culturing; the untreated HUVECs were used as controls. MAIN OUTCOME MEASURES: Allogeneic T cells-induced TF expression in vascular endothelial cells was determined by real-time PCR and flow cytometry. Western blot was used to examine allogeneic T cells-induced phosphorylation of MAPK in HUVEC.RESULTS: After co-culturing with allogeneic CD4~+T cells or CD8~+T cells for 6, 12, and 24 hours, the expression rates of TF on HUVEC membrane were obvious increased than that of the control group (P < 0.05), the expression levels of TF mRNA in HUVEC were also significantly elevated (P < 0.05). Allogeneic CD4~+T cells-induced expression rates of TF were significantly higher than allogeneic CD8~+T cells-induced expression rates at 12 and 24 hours after culture. The expression of p38MAPK and JNK was enhanced after culture with allogeneic T cells, yet the ERK expression had no changes. The p38MAPK or JNK can notably down regulated TF expression, which could block the TF expression when worked together. CONCLUSION: Allogeneic T cells induced TF expression in HUVECs via activation of p38MAPK and JNK.

Objective To explore the expression of protease-aetivated receptor (PAR)-1, 2 in a routine model of acute graft-versus-host disease (aGVHD). Methods A routine model of aGVHD after aUogeneic hematopoietic stem cell transplantation (allo-HSCT) was established, and the syngeneic HSCT mice were used as the controls. Quantitative real-time PCR, Western blot and immunohistoehemistry were done to detect the gene and protein expression of PAR-1, 2 in multiple organs of allo-HSCT mice and the controls. Results Allo-HSCT mice showed classical symptoms and histological changes of aGVHD. PAR-1 mRNA expression was significantly increased in the skin,liver, small intestine of allo-HSCT mice (skin: 0. 039 ± 0. 013 vs. controls: 0. 008 ± 0. 002,P<0. 01 liver: 0. 165 ± 0. 084, vs. controls: 0. 017 ± 0. 006, P<0. 01 ; small intestine: 0. 215 ± 0. 109 vs.controls: 0. 016±0. 009, P<0. 01), but not in the stomach, lung and kidney of allo-HSCT mice (P >0. 05). PAR-2 mRNA expression in the liver and small intestine of allo-HSCT mice was significantly elevated (liver: 0. 010 ± 0. 003 vs. controls: 0. 003 ± 0. 002, P<0. 01 ; small intestine:0. 006 ± 0. 002 vs. controls: 0. 003± 0. 002,P<0. 05), but not in the other organs (P>0. 05). The protein expression of PAR-1, 2 was in accordance with the mRNA expression. Immunohistochemistry revealed the PAR-1, 2 expression was increased in the epithelial eeUs and vascular endothelial cells of target organs of aGVHD. Conclusion Inereased expression of PAR-1, 2 in the target organs of aGVHD suggests PAR-1, 2 may contribute to the pathogenesis of aGVHD after allo-HSCT.

Background:Upon inhibition of STAT3 signaling pathway,cucurbitacin-I elicits anticancer effect in various malignancies. However,the anticancer effect and underlying mechanism of cucurbitacin-I in gastric cancer is still elusive. Aims:To explore the effect of low nanomolar cucurbitacin-I on cell proliferation,cell cycle and apoptosis in human gastric cancer cells and the underlying mechanism in vitro. Methods:Human gastric adenocarcinoma cell lines AGS and HGC-27 were treated with cucurbitacin-I at low nanomolar concentration. The anti-proliferative effect of cucurbitacin-I was detected by CCK-8 assay and colony formation assay. Flow cytometry was used to assess the cell cycle and apoptosis. Expressions of cell cycle-related proteins,as well as activation of related pathways such as caspase-3 / PARP apoptotic pathway,STAT3, GADD45α and JNK/ p38 MAPK signaling pathways were determined by Western blotting. Results:Cucurbitacin-I markedly inhibited the growth of gastric cancer cells at low nanomolar concentration by inducing G2 / M phase arrest and apoptosis via a STAT3-independent manner. Furthermore,it was revealed that the anticancer effect of cucurbitacin-I was associated with up-regulation of GADD45α,activation of JNK/ p38 MAPK signaling pathway and the subsequent apoptotic events. Conclusions:The present study provides new insights into the mechanism of anticancer effect of cucurbitacin-I, supporting cucurbitacin-I as an attractive therapeutic drug in gastric cancer.

Acetates ; poisoning ; Acute Disease ; Humans ; Male ; Middle Aged ; Occupational Diseases ; Occupational Exposure ; adverse effects

Efforts on directed evolution of sortase A to optimize its catalytic properties have been undertaken and shown the promise. To facilitate screening of sortase A mutants with expected catalytic properties, a novel ligation efficiency monitoring system, including reporter substrates GFP-LPETG and GGGYK-Biotin, was developed. GFP-LPETG, wild type sortase A, and a recently reported high activity sortase A mutant were prepared recombinantly from Escherichia coli BL21 (DE3). Taking advantage of the newly designed reporter system, the ligation efficiency catalyzed by wild type and mutant form of sortase A could be sensitively monitored via SDS-PAGE directly. Consistent with previous report, the mutant sortase A displayed much higher catalytic activity compared to wild type enzyme, indicating the new reporter system is easily and fast handled and sensitive. The application of this reporter system into systemic screening will facilitate future directed optimization of sortase A.
Aminoacyltransferases ; genetics ; metabolism ; Bacterial Proteins ; genetics ; metabolism ; Biocatalysis ; Biotin ; Cysteine Endopeptidases ; genetics ; metabolism ; Electrophoresis, Polyacrylamide Gel ; Escherichia coli ; Genes, Reporter ; Ligation ; Mutant Proteins ; genetics ; metabolism