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361.
362.
Bombesin impairs spindle function in mitotic V79 Chinese hamster cells by a receptor-dependent mechanism 总被引:2,自引:0,他引:2
Agneta
nfelt 《Mutation research》1992,270(2):97-102
Bombesin belongs to a family of peptides acting as local hormones with roles in growth regulation, neural function and secretion. Upon binding to its receptor bombesin primarily elicits an increase of inositolphosphates and diacylglycerol, events leading to increased [Ca2+]i and activation of protein kinase C. When asynchronously growing V79 Chinese hamster cells were treated with bombesin in the 10−9−10−7 M concentration range their content of inositolphosphates increased and so did the frequency of mitotic cells with abnormal chromosomal arrangements (c-mitoses). Both effects were abolished by simultaneous addition of the synthetic peptide antagonist D-Arg1,D-Phe5,D-Trpu9-Leu11-substance P that binds to certain bombesin receptors. These results demonstrate that the V79 cells most probably have receptors for bombesin and that the weak but significant c-mitotic effect is mediated by such receptors. 相似文献
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P R Bohjanen B Petryniak C H June C B Thompson T Lindsten 《The Journal of biological chemistry》1992,267(9):6302-6309
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The characteristics of the luminol-amplified chemiluminescence (CL) induced in mononuclear phagocytes interacting with PMA, FMLP or ionomycin were determined. Azide reduced the CL activity by more than 80%, while superoxide dismutase and catalase had minor effect on the monocyte CL response. The sensitivity of the monocyte CL response, to the addition of extra peroxidase differed depending on the stimulus used. Furthermore, no direct correlation was obtained between the CL response and superoxide anion or hydrogen peroxide production. In comparison with the response in granulocytes, minor quantitative differences were observed. The mechanism for the light-generating reaction, seems to be the same in both cell types. 相似文献
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A translocation between chromosome 19 and chromosome 22 was found in one out of nine patients with CML. All the remaining eight patients demonstrated a translocation between chromosomes 9 and 22. The clinical pattern of the disease was similar in the patient with the translocation between chromosomes 19 and 22 and in the other CML patients. Thus the presence of the Ph1 chromosome appears to be more important for the course and pattern of the disease than the location of the translocated fragment. 相似文献
370.
Johanna C Penell Brenda N Bonnett John Pringle Agneta Egenvall 《Acta veterinaria Scandinavica》2009,51(1):50