Although systemic steroids are highly efficacious in ulcerative colitis (UC), failure to respond to steroids still poses an important challenge to the surgeon and physician alike. Even if the life time risk of a fulmi...Although systemic steroids are highly efficacious in ulcerative colitis (UC), failure to respond to steroids still poses an important challenge to the surgeon and physician alike. Even if the life time risk of a fulminant UC flare is only 20%, this condition is potentially life threatening and should be managed in hospital. If patients fail 3 to 5 d of intravenous corticosteroids and optimal supportive care, they should be considered for any of three options: intravenous cyclosporine (2 mg/kg for 7 d, and serum level controlled), infliximab (5 mg/kg Ⅳ, 0-2-6 wk) or total colectomy. The choice between these three options is a medical- surgical decision based on clinical signs, radiological and endoscopic findings and blood analysis (CRP, serum albumin). Between 65 and 85% of patients will initially respond to cyclosporine and avoid colectomy on the short term. Over 5 years only 50% of initial responders avoid colectomy and outcomes are better in patients naive to azathioprine (bridging strategy). The data on infliximab as a medical rescue in fulminant colitis are more limited although the efficacy of this anti tumor necrosis factor (TNF) monoclonal antibody has been demonstrated in a controlled trial. Controlled data on the comparative efficacy of cyclosporine and infliximab are not available at this moment. Both drugs are immunosuppressants and are used in combination with steroids and azathioprine, which infers a risk of serious, even fatal, opportunistic infections. Therefore, patients not responding to these agents within 5-7 d should be considered for colectomy and responders should be closely monitored for infections.展开更多
Objective： To detect the expression of heat shock protein 70 （HSP70） in human renal carcinoma tissues and cultured ACHN cells by using quantum dots-tagged fluorescence technology and its significance. Methods： Usi...Objective： To detect the expression of heat shock protein 70 （HSP70） in human renal carcinoma tissues and cultured ACHN cells by using quantum dots-tagged fluorescence technology and its significance. Methods： Using the fluorescence property of quantum dots, indirect immunofluorescence method and immunocytochemical method were used to detect the expression of HSP70 tagged by quantum dots in renal carcinoma tissues and ACHN cells cultured in vitro. Results： Confocal fluorescence microscopy showed that HSP70 were significantly expressed in renal carcinoma tissues and ACHN cells cultured in vitro characterized by homogeneous distribution of intensive salmon pink fluorescence. Compared with FITC tagging, quantum dots tagged fluorescence had good specificity and signal to background. There was no notable quenching after excitation by quantum dots for 30 rain. Conclusion： Quantum dots can be used to label subcellular proteins and have obvious advantages compared with the traditional fluorescence methods. The quantum dots-tagged fluorescence could be applied as a new method for clinical labeling detection.展开更多
文摘Although systemic steroids are highly efficacious in ulcerative colitis (UC), failure to respond to steroids still poses an important challenge to the surgeon and physician alike. Even if the life time risk of a fulminant UC flare is only 20%, this condition is potentially life threatening and should be managed in hospital. If patients fail 3 to 5 d of intravenous corticosteroids and optimal supportive care, they should be considered for any of three options: intravenous cyclosporine (2 mg/kg for 7 d, and serum level controlled), infliximab (5 mg/kg Ⅳ, 0-2-6 wk) or total colectomy. The choice between these three options is a medical- surgical decision based on clinical signs, radiological and endoscopic findings and blood analysis (CRP, serum albumin). Between 65 and 85% of patients will initially respond to cyclosporine and avoid colectomy on the short term. Over 5 years only 50% of initial responders avoid colectomy and outcomes are better in patients naive to azathioprine (bridging strategy). The data on infliximab as a medical rescue in fulminant colitis are more limited although the efficacy of this anti tumor necrosis factor (TNF) monoclonal antibody has been demonstrated in a controlled trial. Controlled data on the comparative efficacy of cyclosporine and infliximab are not available at this moment. Both drugs are immunosuppressants and are used in combination with steroids and azathioprine, which infers a risk of serious, even fatal, opportunistic infections. Therefore, patients not responding to these agents within 5-7 d should be considered for colectomy and responders should be closely monitored for infections.
文摘Objective： To detect the expression of heat shock protein 70 （HSP70） in human renal carcinoma tissues and cultured ACHN cells by using quantum dots-tagged fluorescence technology and its significance. Methods： Using the fluorescence property of quantum dots, indirect immunofluorescence method and immunocytochemical method were used to detect the expression of HSP70 tagged by quantum dots in renal carcinoma tissues and ACHN cells cultured in vitro. Results： Confocal fluorescence microscopy showed that HSP70 were significantly expressed in renal carcinoma tissues and ACHN cells cultured in vitro characterized by homogeneous distribution of intensive salmon pink fluorescence. Compared with FITC tagging, quantum dots tagged fluorescence had good specificity and signal to background. There was no notable quenching after excitation by quantum dots for 30 rain. Conclusion： Quantum dots can be used to label subcellular proteins and have obvious advantages compared with the traditional fluorescence methods. The quantum dots-tagged fluorescence could be applied as a new method for clinical labeling detection.
