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61.
MUC1 induced by Epstein-Barr virus latent membrane protein 1 causes dissociation of the cell-matrix interaction and cellular invasiveness via STAT signaling 总被引:1,自引:0,他引:1
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Kondo S Yoshizaki T Wakisaka N Horikawa T Murono S Jang KL Joab I Furukawa M Pagano JS 《Journal of virology》2007,81(4):1554-1562
Disruption of cellular adhesion is an essential pathobiologic step leading to tumor dissemination. Mucin 1 (MUC1) is a mucinous glycoprotein expressed at the surfaces of epithelial cells in many tissues and their carcinomas. MUC1 plays crucial roles in tumor invasion and metastasis, especially in opposing cell adhesion. We have shown that virus infection, specifically by the human tumor virus Epstein-Barr virus (EBV) induces a spectrum of cellular invasiveness and metastasis factors. Here we show that expression of MUC1 is increased in diverse latently EBV-infected cell lines that express latent membrane protein 1 (LMP1), the main viral oncoprotein, and that the level of MUC1 was suppressed by expression of a dominant-negative mutant of LMP1. Expression of LMP1 in EBV-negative nasopharyngeal cell lines induces expression of MUC1 through activation of the MUC1 promoter via binding of STAT1 and STAT3. Finally, LMP1 reduces cell adhesion ability, which is restored by inhibition of MUC1 expression with MUC1 small interfering RNA (siRNA). In addition, LMP1 increases cell invasiveness, which is suppressed by MUC1 siRNA. Thus, LMP1 induces MUC1, a factor important in an early step of detachment and release of tumor cells, which along with induction of other invasiveness and angiogenic factors may combine to act in a complex sequential process that culminates in metastasis of EBV-infected tumor cells. 相似文献
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Z Jedlicková M Ryc A Libánská 《Journal of hygiene, epidemiology, microbiology, and immunology》1981,25(2):204-206
Strains of resistant species -- Staphylococcus aureus and Streptococcus faecalis -- isolated from material of nosocomial infections in the surgical department of a Prague hospital were tested for combined effect with further chemotherapeutics. The same concerned Ps, aeruginosa noted, at present, by a high degree of resistance. In Ps. aeruginosa it was the combination sisomicin-carfecillin that proved a success in 50 p. c. of cases as well as that of sisomicin-doxycyclin. At the same time the authors draw attention to the possibility of antagonistic action of the combination sisomicin-chloramphenicol in a third part of the strains tested. Potentiation of the effect in Staphylococcus aureus strains was observed also in the combination sisomicin-carfecillin in more than one half of the strains tested and in case of sisomicin-doxycyclin in one third of the strains. In Streptococcus faecalis strains sisomicin was combined with amoxycillin, carbenicillin, carfecillin and doxycyclin; synergistic action being observed with all those combinations in more than one half of strains tested. No antagonism was registered in those cases. (Ta.). 相似文献
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J Libánsky 《Folia haematologica (Leipzig, Germany : 1928)》1973,100(1):51-56
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Brachydactyly is reported in two brothers born to consanguineous parents (1/8). Additional abnormal features were scoliosis, spina bifida occulta, and carpal synostosis. 相似文献