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  • 1
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Proteolytic enzyme activity has been shown to be important for cyst formation. In this study, we constructed a cyst-like structure in vivo and analyzed molecular mechanisms involved in the development of the lesion. When SV40-immortalized duct cells of normal human salivary gland (NS-SV-DC) were treated with TGF-βl at a concentration of 1 ng/ml or 5 ng/ml followed by co-inoculation with Matrigel into the backs of nude mice, they formed large cysts containing fluid when 5 ng/ml of TGF-βl was used. Analysis of the fluid demonstrated high MMP activity. Immunohistochemical staining exhibited strong reactivity with anti-MMP-2 antibody in TGF-pl (5 ng/ml)-treated NS-SV-DC. Northern blot analysis indicated that the expression of TGF-β1 and MMP-2 mRNAs in ceils was greatly enhanced by treatment with 5ng/ml TGF-βl. These findings suggest that the in vivo cyst formation by TGF-βl-treated cells is associated with continuous induction of MMP-2 activity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 24 (1995), S. 0 
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We examined the content of type IV collagenases and plasminogen activators (PAs) in luminal fluid of four extravasation mucoceles by means of gelatin or casein zymography. Immunohistochemical staining for type IV collagenases and PAs was performed to identify the possible source of these enzymes. The luminal fluid examined by gelatin zymography showed a high level of type IV collagenases compared with saliva from Wharton's duct. PAs were detected in only one of the cases by casein zymography, and none was detected in the saliva. By immunohistochemical staining, type IV collagenases and PAs were detected in duct and myoepithelial cells of the adjacent salivary gland and in macrophages and fibro-blasts of the cyst wall. The results suggest that proteolytic enzymes are involved in the pathogenesis of mucoceles.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 27 (1998), S. 0 
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Hoque MO, Azuma M, Sato M: Significant correlation between matrix metalloproteinase activity and tumor necrosis factor-a in salivary extravasation mucoceles. J Oral Pathol Med 1998; 27: 30–3. © Munksgaard, 1998.We examined the matrix metalloproteinase (MMP) activity and tumor necrosis factor (TNF)-a in luminal fluid of 18 extravasation mucoceles and in saliva from Wharton's duct of five patients by means of gelatin zymography and enzyme immunoassay, respectively. The luminal fluid showed a high level of MMP activity compared with the saliva. Quantitative determination by enzyme immunoassay revealed that the luminal fluid contained higher levels of TNF-a than the saliva. In addition, the amount of TNF-a in luminal fluid exhibited a direct correlation with MMP activity estimated by densitometric analysis of gelatin zymograms. Since TNF-a stimulates the production of MMPs from cells such as fibroblasts, these results suggest that TNF-a is one of the causal molecules that enhance the accumulation of proteolytic enzymes in luminal fluid of mucoceles.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1435-5604
    Keywords: Polycythemia vera ; Secondary Hyperparathyroidism ; Hemodialysis ; Parathyroid hormone (PTH) ; Uremic toxin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of polycythemia vera complicated by chronic renal failure under maintenance hemodialysis requiring parathyroidectory (PTH) for secondary hyperparathyroidism (2° HPT) is reported. A 62 year old female presented with 75000 white blood cells (WBC)/µl, 703×104 red blood cells (RBC)/µl, 23×104 platelets (PLT)/µl, hyperuricemia and hypertension in 1970 and the diagnosis of polycythemia vera was made. Hemodialysis was started in October 1974 for chronic renal failure. Blood cells in peripheral blood rapidly decreased in number after the beginning of dialysis, reaching the level of 10000∼20000 WBC/µl, and 150∼250×104RBC/µl. In August 1988, marked bone resorption in X-ray picture and high serum alkaline phosphatase and parathyroid hormone (PTH) noted along with 17400 WBC/µl, 370×104RBC/µl and 35.9×104PLT/µl. After subtotal PTX removing 3.21g parathyroid gland, serum PTH rapidly fell. At 3 months after PTX, WBC rose to 23600/µl, RBC 372×104/µl and PLT 94.0×104/µl. At 6 months, WBC was to 31000/µl, RBC 429×104/µl and PLT 78.0×104/µl, suggesting an inhibitory action of PTH on not only RBC, but also WBC and PLT.
    Type of Medium: Electronic Resource
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