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LG Yu DG Fernig MR White DG Spiller P Appleton RC Evans I Grierson JA Smith H Davies OV Gerasimenko OH Petersen JD Milton JM Rhodes 《Canadian Metallurgical Quarterly》1999,274(8):4890-4899
The Galbeta1-3GalNAcalpha (TF antigen)-binding lectin (ABL) from the common edible mushroom (Agaricus bisporus) has a potent anti-proliferative effect without any apparent cytotoxicity. This unusual combination of properties prompted investigation of its mechanism of action. In contrast to soluble lectin, agarose-immobilized, and hence noninternalizable ABL had no effect on proliferation of HT29 colon cancer cells. Electron microscopy of HT29 cells incubated with fluorescein- and gold-conjugated ABL showed internalization of the lectin into endocytotic vesicles and multivesicular bodies. Confocal microscopy showed perinuclear accumulation of fluorescein isothiocyanate-conjugated lectin, which also inhibits HT29 cell proliferation, raising the possibility that the lectin might interfere with nuclear pore function. Transport of heat shock protein 70 into the nucleus in response to heat shock was blocked by preincubation of HT29 cells for 6 h with 40 micrograms/ml ABL. In digitonin-permeabilized cells, nuclear uptake of bovine albumin conjugated to a nuclear localization sequence (NLS)-containing peptide was also inhibited by a 15-min preincubation with 40-100 micrograms/ml ABL. In contrast, serum-stimulated nuclear translocation of mitogen-activated protein kinase, which is NLS-independent, was not affected by pretreatment of cells with the lectin. These results suggest that the anti-proliferative effect of ABL is likely to be a consequence of the lectin trafficking to the nuclear periphery, where it blocks NLS-dependent protein uptake into the nucleus. 相似文献
23.
The characteristics of marriages contracted in 1993 in two districts of the city of Khar'kov were studied. The age, education, occupation, ethnicity, and birthplace of the spouses were recorded. The genetic demographic parameters of the marriage structure were compared to the results of a similar study performed in 1985. It was found that since 1985, the average age of marriage and the educational level of spouses had increased, while the ethnic diversity and coefficients of contingency by the spouses' ethnicity and profession had decreased. The contingency coefficient for the birthplace has increased. The causes and genetic consequences of these changes are discussed. 相似文献
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Distribution of T-bands on mitotic chromosomes of Bos taurus was studied. Association of T-bands with telomeres and enrichment of T-bands with genes, with a known localization is described. After THA-banding on the chromosomes of cattle, telomeric and pericentromeric regions of all autosomes showed bright fluorescence. The exception was for chromosome 7, which did not have telomeric T-bands. Interstitial T-bands were detected only on chromosomes 7, 16, and Y (7q13, 7q15, 7q22, 7q24, 16q21, and Yp12). A total proportion of centromeric, telomeric, and interstitial T-bands was 11.19, 9.97, and 2.02% of the length of the haploid chromosome set, respectively. By means of fluorescent in situ hybridization (FISH), the presence of the telomeric repeat (TTAGGG)n was shown not only in telomeric regions of all autosome, but also in all pericentromeric regions. The obtained data are indicative of the specificity of T-banding on the chromosomes of Bos taurus. 相似文献
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VA Kholodny? IF Syrbu MM Militsa VP Kovalenko VO Zhulin'sky? OV Kapshytar 《Canadian Metallurgical Quarterly》1997,(11-12):10-11
While examination of 83 patients it was established that in the presence of complicated gastric and duodenal ulcer disease the secondary immune deficiency is developing, which deepens after the surgical intervention conduction. Tiotriazolin, promoting the immune system state and the blood biochemistry indexes normalization, the immune system state and the blood biochemistry indexes stimulation, hemopoiesis stimulation, the treatment results improvement, was applied for immunomodulation. 相似文献
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OV Rusina 《Canadian Metallurgical Quarterly》1997,80(1):69-71
Gaucher-like cells were found in the bone marrow and liver of an Omani teenager who had common acute lymphoblastic leukemia (cALL) confirmed on peripheral blood analysis by the presence of CD10 antigen. Leukocytic or fibroblastic beta-glucocerebrosidase enzyme activity was not measured, but other biochemical data and features of bone marrow on electron microscopy were not indicative of genuine type 1 Gaucher's disease. To our knowledge, this is the first report of pseudo-Gaucher's cells in association with cALL. 相似文献
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KB Aslanidi OV Aslanidi DM Vachadze OA Mornev TV Potapova LM Chailakhyan EG Shtemanetyan 《Canadian Metallurgical Quarterly》1997,11(3):349-365
To describe electrical phenomena observed in growth of Neurospora crassa hyphae, a theoretical model was developed considering the hypha as a one-dimensional electric cable with non-uniform longitudinal distribution of current sources reflecting the activity of proton pumps. A profile of the density of the pump current along the hypha is proposed, at which the results of simulation quantitatively coincide with the results of physiological experiments. The model values of energy coupling in the growth zones were estimated. The experimental dependence of the elongation rate of regenerating apical hypha fragments on their lengths was determined. Based on the comparison of these experimental results with the results of analysis of the model, the contribution of the axial metabolite transport, from the distal parts of the hypha to the apical part, to the dynamics of the apical cell growth was estimated. The possibility of evaluating the intensity of high-molecular-weight syntheses and/or accumulation of substances in granules was demonstrated. The growth rate of the regenerating hypha fragments was shown to correlate with the electric current flowing into the apical fragment 0.2-mm in length. 相似文献