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  • 1
    In: American Journal of Nephrology, S. Karger AG, Vol. 19, No. 6 ( 1999), p. 686-693
    Abstract: 〈 i 〉 Background/Aims: 〈 /i 〉 Glomerular basement membranes (GBM) and tubular basement membranes (TBM) consist of a fine meshwork composed mainly of type IV collagen. Each segment of tubules has specialized physiologic functions, and thus we investigated the ultrastructure of various basement membranes in rat kidneys. 〈 i 〉 Methods: 〈 /i 〉 Since purifying basement membranes from different tubule segments is technically challenging, we employed tissue negative staining rather than conventional negative staining to compare the ultrastructures of proximal and distal TBM and GBM in normal rats. We also assessed the distribution of extracellular matrix components including type IV collagen, laminin, heparan sulfate proteoglycan, and fibronectin in the basement membranes by immunohistochemistry. 〈 i 〉 Results: 〈 /i 〉 TBM and GBM of normal rats showed a fine meshwork structure consisting of fibrils forming small round to oval pores. Short- and long-pore diameters in proximal tubules were 3.3 ± 0.5 and 3.9 ± 0.6 nm, respectively, and in distal tubules 3.5 ± 0.7 and 4.3 ± 0.8 nm, respectively. For GBM the respective diameters were 2.5 ± 0.5 and 3.0 ± 0.5 nm. Immunohistochemical analysis showed no significant difference in distribution of extracellular matrix components between proximal and distal TBM. However, immunofluorescence scores of α1 chain of type IV collagen, fibronectin, and laminin were higher in the TBM than in the GBM. On the other hand, heparan sulfate proteoglycan was higher in the GBM. 〈 i 〉 Conclusion: 〈 /i 〉 Ultrastructural differences in renal basement membranes may be related to differences in physiologic function in each segment.
    Type of Medium: Online Resource
    ISSN: 0250-8095 , 1421-9670
    Language: English
    Publisher: S. Karger AG
    Publication Date: 1999
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    detail.hit.zdb_id: 1468523-1
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  • 2
    In: Digestion, S. Karger AG, Vol. 84, No. Suppl. 1 ( 2011), p. 10-16
    Abstract: 〈 i 〉 Background and Aims: 〈 /i 〉 Double-filtration plasmapheresis (DFPP) together with interferon (IFN) administration produces a substantial reduction in the viral load during the early stages of treatment. 〈 i 〉 Methods: 〈 /i 〉 Based on their responses to previous pegylated IFN and ribavirin (PEG-IFN/RBV) therapy, 20 patients were divided into null virological response (NVR; n = 12) and relapse (n = 8) groups. DFPP was used in combination with IFN-β/RBV with subsequent administration of PEG-IFN-α2a/RBV therapy (DFPP + IFN-β/RBV then PEG-IFN/RBV). Early viral dynamics was assessed, focusing especially on complete early virological response (cEVR) associated with sustained virological response. Additionally, the interleukin 28B gene, the IFN/RBV resistance-determining region, the IFN sensitivity-determining region and the core regions were analyzed. 〈 i 〉 Results: 〈 /i 〉 Rapid virological response was achieved in 0% (0/12) of NVR and in 75% (6/8) of relapse patients, with a significant difference between the two groups (p = 0.001). Similarly, cEVR was achieved in 8% (1/12) of NVR and in 88% (7/8) of relapse patients, with a significant difference between the two groups (p = 0.037). By multivariate logistic regression analysis, interleukin-28B major was a significant determiner of cEVR (odds ratio = 24.19, p = 0.037). 〈 i 〉 Conclusion: 〈 /i 〉 DFPP + IFN-β/RBV then PEG-IFN/RBV therapy is indicated more for relapse than for NVR patients.
    Type of Medium: Online Resource
    ISSN: 0012-2823 , 1421-9867
    RVK:
    RVK:
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2011
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  • 3
    In: Nephron, S. Karger AG, Vol. 75, No. 4 ( 1997), p. 490-491
    Type of Medium: Online Resource
    ISSN: 1423-0186 , 0028-2766
    Language: English
    Publisher: S. Karger AG
    Publication Date: 1997
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    detail.hit.zdb_id: 1464421-6
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  • 4
    In: Nephron, S. Karger AG, Vol. 79, No. 1 ( 1998), p. 91-98
    Abstract: Mononuclear cells, primarily macrophages and lymphocytes, infiltrate the renal glomeruli and are involved in the progression of various glomerular diseases. Intercellular adhesion molecule 1 (ICAM-1) is expressed on the vascular endothelium and mediates the infiltration of leukocytes into the site of inflammation. Although the expression of ICAM-1 can be induced by the stimulation of inflammatory cytokine, ICAM-1 expression can also be induced by such nonimmune mechanisms as shear stress. Glomerular hyperfiltration is a major mechanism that contributes to the progression of the glomerular sclerosis that results from the loss of functioning nephrons. In the present study, we examined the role of ICAM-1 for mononuclear cell infiltration in the glomeruli of the five-sixth nephrectomized rat as a model of glomerular hyperfiltration. The fluorescence intensity score of the staining for ICAM-1 in the glomeruli of the five-sixth nephrectomized rats was significantly increased as compared with that in the control (sham-operated) rats at 1 week (1.51 ± 0.15 vs. 0.61 ± 0.13; p 〈 0.01) and 2 weeks (1.31 ± 0.17 vs. 0.51 ± 0.09; p 〈 0.01). The number of leukocytes present in the glomeruli was significantly increased in the five-sixth nephrectomized rats compared with control (sham-operated) rats at 1 week (3.44 ± 0.16 vs. 0.99 ± 0.08; p 〈 0.01) and 2 weeks (3.14 ± 0.14 vs. 0.89 ± 0.07; p 〈 0.01). Leukocytes mainly consisted of macrophages in the five-sixth nephrectomized rats at 1 week (2.39 ± 0.19) and 2 weeks (1.46 ± 0.11). Anti-ICAM-1 monoclonal antibody effectively prevented the infiltration of macrophages into the glomeruli following nephrectomy. These results indicate that glomerular hyperfiltration may be involved in the induction of the expression of ICAM-1 and the infiltration of macrophages into the renal glomeruli following glomerular injury.
    Type of Medium: Online Resource
    ISSN: 1660-8151 , 2235-3186
    Language: English
    Publisher: S. Karger AG
    Publication Date: 1998
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  • 5
    In: Nephron, S. Karger AG, Vol. 79, No. 4 ( 1998), p. 458-468
    Abstract: Increases in extracellular matrix (ECM) and changes in its components have been documented in the glomeruli of diabetic nephropathy. Advanced glycation end products formed by glycoxidation have been shown to induce the synthesis of ECM components and transforming growth factor beta (TGF-β), suggesting that advanced glycation end products may be involved in the etiology of imbalance of ECM components in diabetic glomerulosclerosis. The Otsuka Long-Evans Tokushima Fatty (OLETF) rat is an inbred strain that spontaneously develops non-insulin-dependent diabetes mellitus which progresses to diabetic glomerulosclerosis. N 〈 sup 〉 & #917; 〈 /sup 〉 -(carboxymethyl)lysine (CML) is known to be formed by glycoxidation. To clarify the involvement of glycoxidation in diabetic nephropathy, we examined the localization of CML, ECM components, and TGF-β 〈 sub 〉 1 〈 /sub 〉 in the glomeruli of OLETF rats. The amounts of α 〈 sub 〉 3 〈 /sub 〉 (IV) collagen, type VI collagen, and fibronectin were significantly increased in the glomeruli of OLETF rats, whereas the heparan sulfate proteoglycan levels were decreased. After 6 months of age, CML levels were significantly increased in the mesangial area of the glomeruli in these animals. The overexpression of TGF-β 〈 sub 〉 1 〈 /sub 〉 preceded the increase in glomerular ECM components. The present study demonstrated that the accumulation of CML precedes the changes of glomerular ECM components in the glomeruli during the course of diabetic nephropathy, suggesting that glycoxidation may be one of the major causes of diabetic glomerulosclerosis.
    Type of Medium: Online Resource
    ISSN: 1660-8151 , 2235-3186
    Language: English
    Publisher: S. Karger AG
    Publication Date: 1998
    detail.hit.zdb_id: 2810853-X
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  • 6
    In: Oncology, S. Karger AG, Vol. 92, No. 2 ( 2017), p. 101-108
    Abstract: 〈 b 〉 〈 i 〉 Background: 〈 /i 〉 〈 /b 〉 Neoadjuvant chemotherapy for resectable advanced esophageal squamous cell carcinoma (ESCC) requires reassessment. We have conducted a trial aiming at the comparison between DCF and ACF concerning perioperative adverse events. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 Patients were randomly assigned to receive either DCF [docetaxel 70 mg/m 〈 sup 〉 2 〈 /sup 〉 , cisplatin 70 mg/m 〈 sup 〉 2 〈 /sup 〉 on day 1, and 5-fluorouracil (5-FU) 700 mg/m 〈 sup 〉 2 〈 /sup 〉 for 5 days] every 3 weeks or ACF (adriamycin 35 mg/m 〈 sup 〉 2 〈 /sup 〉 , cisplatin 70 mg/m 〈 sup 〉 2 〈 /sup 〉 on day 1, and 5-FU 700 mg/m 〈 sup 〉 2 〈 /sup 〉 for 7 days) every 4 weeks. Each group consisted of 81 patients. Two cycles of preoperative chemotherapy were planned, after which patients underwent subtotal esophagectomy via a right thoracotomy with lymphadenectomy. Chemotherapy- and surgery-related adverse effects were assessed. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 Grade 3-4 neutropenia and febrile neutropenia occurred in 90 and 39% of patients, respectively, in the DCF group compared with 69 and 17% of patients, respectively, in the ACF group ( 〈 i 〉 p 〈 /i 〉 〈 0.01). Perioperative complications did not differ significantly between the groups. The overall response rates of DCF and ACF were 61 and 40%, respectively, while the histopathological complete responses were 15 and 3%, respectively ( 〈 i 〉 p 〈 /i 〉 〈 0.01). 〈 b 〉 〈 i 〉 Conclusion: 〈 /i 〉 〈 /b 〉 The DCF and ACF regimens were found to be equally feasible in patients with resectable advanced ESCC; however, DCF delivered an antitumor effect and therefore potentially improved the long-term outcomes.
    Type of Medium: Online Resource
    ISSN: 0030-2414 , 1423-0232
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    Language: English
    Publisher: S. Karger AG
    Publication Date: 2017
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