Résumé
BACKGROUND: The use of autogenous cartilage has the problem of donor site morbidity and limited supply in reconstructive surgery. OBJECTIVES: The purpose of this study is to increase the size and the volume of the autogenous small cartilage by the new three dimensional culture technique. MATERIALS AND METHODS: The chondrocytes from biopsied human septal cartilage were subcultured. The increased cells were encapsulated with calcium alginate and were injected to the subcutaneous tissue of the athymic nude mouse for in vivo 3-dimensional culture. RESULTS: After 8 weeks of the injection, the implanted subcutaneous nodule was seemed to be the natural cartilage and the histoarchtectures revealed characteristics of the hyaline cartilage. CONCLUSION: This results suggest that the small biopsied cartilage can be expanded by the techniques of subculture and the 3-dimensional culture., and can potentially overcome the limited availability of autogenous donor cartilage.
Sujets)
Animaux , Humains , Souris , Calcium , Cartilage , Techniques de culture cellulaire , Chondrocytes , Techniques de culture , Cartilage hyalin , Souris nude , Tissu sous-cutané , Donneurs de tissusRésumé
BACKGROUND: ndothelin-1(ET1) has been reported about it's versatile pharmagological and physiological influences to airway calibre. Some investigators suggested that ET1 exisit in the nasal mucosa, and may play a part in the exaggerated symptoms of asthma and in controlling the nasal mucosal physiology. OBJECTIVES: In order to clarify the alterations of expression of ET1 in the pathologic nasal mucosa, we investigated the distribution of ET1 by immunohistochemistry at the allergic rhinitis mucosa and the polyp tissues. MATERIALS AND METHODS: The mucosal specimens were obtained from the inferior turbinate of normal persons(n=5) and from patients with allergic rhinitis(n=10), and the polyps from the lateral nasal wall of non-allergic patients(n=10). The immunoreactivity of the ET1 was evaluated by the immunohistochemical stainig with the anti-ET1 monoclonal antibody. RESULTS: The immunoreactivity of ET1 could be observed weakely in the epithelium, in the vascular endotheluim, and in the submucosal gland. But the feature was not constant and showed no statistical significance in each group. On the other hand, strong positive immunoreactivity was noted in the cytoplasm of the granulated large cells and bilobed nuclear leukocytes in the submucosa. These cells were proved to be the mast cells and the eosinophils respectively by means of the toluidine blue and the H & E staining. CONCLUSION: These findings would be reasonable to suggested that the ET1 existed in the mast cells and the eosinophils as like cytokines, and the ET1 activity may be affected by the quantity of these cells in allergic rhinitis or nasal polyps.
Sujets)
Humains , Asthme , Cytokines , Cytoplasme , Endothéline-1 , Granulocytes éosinophiles , Épithélium , Main , Immunohistochimie , Leucocytes , Mastocytes , Muqueuse , Muqueuse nasale , Polypes du nez , Physiologie , Polypes , Personnel de recherche , Rhinite , Chlorure de tolonium , CornetsRésumé
PURPOSE: To investigate the role of 3D imaging in the sinonasal mass. MATERIALS AND METHODS: Twenty patients with sinonasal mass(squamous cell carcinoma[n=6], spindle cell carcinoma[n=1}, angiomatous polyp[n=1}, giant cell reparative granuloma[n=1}, non-Hodgkin's lymphoma[n=1}, melanoma[n=1}, angiofibroma[n=1}, pyocele[n=1}, inverted papilloma[n=1}) were studied with spiral CT. Reconstruction of surface rendered 3D images and segmentations were performed and compared with the 2D image. RESULTS: The 3D images enabled easy understanding of the characteristics of the mass in 12 casese. The 3D images displayed pathway of tumor extension in 5 cases and werehelpful in assessing the primary site of the mass in 3 cases. In two cases with encasement of ICA by the mass, assesment of relationship between the mass and vessels were possible through the segmentation. CONCLUSION: The 3D image, as an adjunct to the 2D image, can help to evaluate the virtual appearance of bony change, the degree of extension of mass, the spreading route, the evaluation of origin site. It also provides valuable 3-dimensional conception of the mass, especially for the surgeon.