Ets-1 is an Ets family transcription factor, can up-regulate the transcription of matrix metalloproteinase (MMP) genes and confers an invasive phenotype on human cancer cells. HSC3 is an oral squamous cell carcinoma-derived cell line, and it manifests high levels of Ets-1 and MMP-9 gene expression that are associated with invasive potential. In this study, we investigated the effect of Ets-1 on the invasive properties of oral cancer from a molecular biological perspective. We constructed an Ets-1 antisense (AS) expression vector, transfected HSC3 cells with the vector, and obtained HSC3AS cells that express Ets-1 AS RNA. The expression of Ets-1 and MMP-9 was analyzed with RT-PCR. The invasive ability of the HSC3AS cells was determined using a matrigel invasion assay and MMP-9 production was measured using gelatin zymography. The amount of Ets-1 mRNA was significantly reduced in HSC3AS cells compared with parental HSC3 cells and the control transfected with empty vector. Matrigel invasion assay revealed that the HSC3AS cells had lower invasive ability. Gelatin zymography demonstrated that HSC3AS MMP-9 productions were decreased compared with those of parental HSC3 cells and the control. These results imply that transfection of AS Ets-1 inhibits oral cancer invasion by down-regulating MMP-9 genes.

Ets-1 is an Ets family transcription factor, can up-regulate the transcription of matrix metalloproteinase (MMP) genes and confers an invasive phenotype on human cancer cells. HSC3 is an oral squamous cell carcinoma-derived cell line, and it manifests high levels of Ets-1 and MMP-9 gene expression that are associated with invasive potential. In this study, we investigated the effect of Ets-1 on the invasive properties of oral cancer from a molecular biological perspective. We constructed an Ets-1 antisense (AS) expression vector, transfected HSC3 cells with the vector, and obtained HSC3AS cells that express Ets-1 AS RNA. The expression of Ets-1 and MMP-9 was analyzed with RT-PCR. The invasive ability of the HSC3AS cells was determined using a matrigel invasion assay and MMP-9 production was measured using gelatin zymography. The amount of Ets-1 mRNA was significantly reduced in HSC3AS cells compared with parental HSC3 cells and the control transfected with empty vector. Matrigel invasion assay revealed that the HSC3AS cells had lower invasive ability. Gelatin zymography demonstrated that HSC3AS MMP-9 productions were decreased compared with those of parental HSC3 cells and the control. These results imply that transfection of AS Ets-1 inhibits oral cancer invasion by down-regulating MMP-9 genes.

Heparin-binding epidermal growth factor (EGF)-like growth factor (HB-EGF), which belongs to the EGF family, has been shown to stimulate the growth of a variety of cells in an autocrine or paracrine manner. Although HB-EGF is widely expressed in tumors when compared to normal tissue, its contribution to tumor invasion is still not known. In the present study, we analyzed the effects of HB-EGF on the invasion activity of a cultured oral cancer cell line using short interfering RNA (siRNA).Oral squamous carcinoma cell lines, HSC3 and SAS, were transfected with siRNA targeting HB-EGF. Expression of HB-EGF was analyzed by real-time PCR. The invasiveness of the transfected cells was determined using a matrigel invasion assay, and MMP-9 production was measured by RT-PCR and gelatin zymography.The expression of HB-EGF was reduced in HSC3-siRNA and SAS-siRNA cells. The matrigel invasion assay demonstrated that the invasiveness of HSC3-siRNA and SAS-siRNA cells was reduced. Gelatin zymography demonstrated that in HSC3-siRNA and SAS-siRNA cells, MMP9 production was decreased.These findings suggest that HB-EGF expression is related to the invasion activity of oral cancer, particularly via regulation of MMP9.

Reoperations after operations for acute type A aortic dissection were performed in two cases under deep hypothermic circulatory arrest. In case 1, the aortic arch replacement was performed with an inclusion technique seven years ago. The reason for reoperation was the leak from the suture lines of all anastomosis sites. Three sites of leak were closed putting sutures with pledgets. In case 2 the graft replacement of the ascending aorta was performed five years ago. The reason for reoperation was the persistent dissection from the aortic arch to the thoracic descending aorta due to the new entry formation at the site of the aortic clamp. At first the graft replacement of the thoracic descending aorta was performed, followed by arch replacement. As these conditions are preventable, we should perform the open distal anastomosis technique without using a clamp and graft replacement of aortic arch with the branched graft. Moreover, deep hypothermic circulatory arrest may appear to be a valuable adjunct for reoperation after operation on acute type A dissection.

Objective: Patients treated with vinorelbine(VNR)-containing chemotherapy often suffer from injection site reactions.  VNR is a moderate vesicant that is well known to cause local venous damage.  We conducted this study to identify clinical risk factors related to the incidence of injection site reactions caused by VNR, and whether applying a hot compress was effective for preventing such reactions.
Methods: Medical records were retrospectively investigated for 48 patients treated with chemotherapy regimens containing VNR.  Injection site reactions were evaluated for every course and were graded according to the National Cancer Institute Common Toxicity Criteria (version 4.0).  Gender, age, body mass index, chemotherapy regimen, dose of VNR, and volume of fluid for flushing the vein were assessed as clinical variables.  A hot compress was applied to the vein proximal to the injection site during VNR injection.
Results: The injection site reactions occurred in 29 (60%) among 48 patients received intravenous VNR injection.  According to multivariate analysis, use of gemcitabine (GEM) in combination with VNR showed a significant independent correlation with an increased risk of injection site reactions (p=0.019).  When hot compress was applied to 21 patients, who experienced phlebitis of VNR, the injection site reaction was occurred to only three patients (p<0.001).
Conclusion: In this study, the risk factor of the injection site reaction by VNR seems to be combination of GEM.  Application of hot compresses was effective for preventing injection site reactions by VNR.

Most mediastinal abscesses result from infections after thoracotomy, esophageal perforation or pene- trating chest trauma. This disease is rarely caused by closed blunt chest trauma. All previously reported such cases after closed blunt chest trauma presented with hematoma and sternal osteomyelitis resulting from sternal fracture. Here we report a 15-year-old sumo wrestler who presented with an anterior mediastinal abscess without any mediastinal fracture. The mediastinal abscess resulted from the hematogenous spread of Staphylococcus aureus to a hematoma that might have been caused by a closed blunt chest trauma incurred during sumo wrestling exercises.
Abscess ; diagnosis ; microbiology ; therapy ; Adolescent ; Anti-Bacterial Agents ; therapeutic use ; Combined Modality Therapy ; Debridement ; Diagnosis, Differential ; Drainage ; Humans ; Magnetic Resonance Imaging ; Male ; Mediastinal Diseases ; diagnosis ; microbiology ; therapy ; Staphylococcal Infections ; diagnosis ; microbiology ; therapy ; Thoracic Injuries ; diagnosis ; microbiology ; therapy ; Tomography, X-Ray Computed ; Wounds, Nonpenetrating ; diagnosis ; microbiology ; therapy ; Wrestling ; injuries