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排序方式: 共有853条查询结果,搜索用时 31 毫秒
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M Herlyn D Herlyn D E Elder E Bondi D LaRossa R Hamilton H F Sears G Balaban D Guerry W H Clark 《Cancer research》1983,43(11):5502-5508
Of 66 specimens from benign melanocytic nevi, including common acquired and congenital nevi, Spitz tumors (epithelioid cell nevi), and melanocytic nevi with dysplasia, 57 could be grown in tissue culture. The cultured cells were identified as melanocytes by the presence of premelanosomes and melanosomes. Cells from 28 of 32 nevus cultures grew in an anchorage-independent way in soft agar with a colony-forming efficiency between 0.001 and 1%. Clones derived from single cells and soft agar-selected colonies showed marked phenotypic heterogeneity, but all had a limited life span and did not undergo transformation in culture. These cells were nontumorigenic in nude mice. Cultured nevus cells expressed antigens present on melanoma but absent on normal fibroblasts and/or melanocytes as tested with monoclonal anti-melanoma antibodies. The anti-melanoma antibodies bound equally well to dysplastic, congenital, and common acquired nevi. Antigens are released by nevus cells similar to melanoma cells. 相似文献
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McGLADDERY SL; APARICIO S; VERRIER-JONES K; ROBERTS R; SACKS SH 《QJM : monthly journal of the Association of Physicians》1992,83(4):533-539
To investigate the influence of asymptomatic bacteriuria inchildhood on subsequent pregnancy, we reviewed the outcome of139 pregnancies in 88 women who were first identified duringa programme of screening schoolgirls for asymptomatic bacteriuriacarried out between 19701972 [1]. Data were analysedfor the following groups: 50 pregnancies in 28 women with knownrenal scars (group 1); 16 pregnancies in 14 women with normalkidneys and reflux (group 2); 73 pregnancies in 46 women withnormal urinary tracts (group 3); 139 healthy controls. Women in group 1 had a 3.3-fold increased relative risk of hypertension(p < 0.01) and a 7.6-fold increased risk of pre-eclampsia(p< 0.05) compared to controls, and a higher rate of obstetricinterventions, including emergency caesarean section. Womenin groups 2 and 3 appeared to carry a slightly increased riskof hypertension during the last trimester (RR = 1.8) but therewere no significant differences in this or the incidence ofpre-eclampsia or mode of delivery. Bacteriuria was more prevalentin all index groups compared to controls (37 per cent vs. 8per cent, p < 0.01) and included four cases of acute pyelonephritisin the study group. Fetal outcome was satisfactory in all cases.These results suggest that women with renal scars are at riskof hypertension and pre-eclampsia during pregnancy but thatmodern obstetric care minimizes these risks. 相似文献
117.
Cytogenetic evidence for the clonal nature of Richter's syndrome 总被引:2,自引:0,他引:2
Sequential chromosome studies were done on a patient who developed diffuse histiocytic lymphoma (DHL) after a long history of untreated chronic T-cell leukemia. During the indolent phase of her disease, a pseudodiploid lymphocyte population with 3q+ and 14q+ chromosome markers gradually replaced the originally diploid tumor cells. The karyotype of the lymphoma was hypertriploid (70--74 chromosomes) with the same 3q+ and 14q+ markers. The findings indicate that DHL in this patient evolved from the leukemic T-cell clone. 相似文献
118.
Primary melanoma cells of the vertical growth phase: similarities to metastatic cells 总被引:7,自引:0,他引:7
M Herlyn G Balaban J Bennicelli D Guerry R Halaban D Herlyn D E Elder G G Maul Z Steplewski P C Nowell 《Journal of the National Cancer Institute》1985,74(2):283-289
Three primary and 16 metastatic melanoma cell lines were established from primary and metastatic lesions of 4 patients with malignant melanoma. Comparison of metastatic melanoma cells with cells of the vertical growth phase (VGP) or late primary melanoma from the same individual revealed, generally, a shorter population-doubling time, growth to a higher cell density, higher tyrosinase activity, and more pigmentation in metastatic cells. Conversely, primary and metastatic melanoma cells had similar morphology, plating efficiency, and tumorigenicity in nude mice. Karyotypic analysis revealed clonality and nonrandom abnormalities in chromosomes 1, 6, and 7 in cells of the primary and metastatic lesions of the 3 patients studied. Few differences were found in the expression of melanoma-associated antigens on short-term and long-term cultured cells by tests with monoclonal antibodies in mixed hemadsorption assays, flow cytometry, and radioimmunoassays. Our results indicate that cells cultured from the VGP but not from the radial growth phase of primary melanoma are similar to metastatic melanoma cells. 相似文献
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