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• W2100054885 abstract "In order to quantify the invasiveness of melanoma tumor cellsin vitro, a modification of the amniotic basement membrane (BM) model, described by Liottaet al. (Cancer Letters,11, 141, 1980), was used in combination with radiolabeled tumor cells. B16-F10 metastatic murine melanoma cells and a derived clone (B16-F10L) were prelabeled with 0·1 μCi/ml of [14C]thymidine for 20–24 h in serum-free medium at 37°C. Following incubation, fetal bovine serum was added to a concentration of 5 per cent, and the cells were allowed to grow to confluency for the next 24–28 h. The labeled cells were seeded onto amniotic membranes situated in Membrane Invasion Culture System (MICS) chambers at a density of 2·5×104 per well. At various times points, radioactivity of tumor cells that completely traversed the membrane was determined using an under-the-membrane sampling method. The average percent invasion demonstrated by the B16-F10 line was 2·75 per cent, and 3·65 per cent exhibited by the B16-F10L cell line after 48–53 hin vitro. Since it was apparent that some variability in thickness existed among membrane samples, a morphological analysis was performed on five sectors of a three-inch-diameter sample from four different placentae. Differences and similarities in BM thickness within the same sector were noted by this technique and could possibly contribute to some variability observed in tumor cell invasion in this model. Another parameter examined was the proliferation of tumor cells in the upper and lower wells of the MICS chambers. By 48 h, approximately 32·1 per cent of the B16-F10 cell line as well as the clone had replicated in the upper wells associated with the BMs compared with a 32·9 per cent replication in the lower wells, which reaffirmed the viability of the tumor cells under experimental conditions and insured similarly replicating populations of cells. In order to quantify the invasiveness of radiolabeled tumor cells accurately through a biological membranous barrier, the proper concentration of cells must be used, tumor cell heterogeneity should be taken into consideration, the technique of sampling radiolabeled invasive cells should be critically analysed, and thickness of the membranous barrier should all be considered as possible important factors in the quantitative analyses." @default.
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• W2100054885 date "1985-10-01" @default.
• W2100054885 modified "2023-09-23" @default.
• W2100054885 title "In vitro quantification of melanoma tumor cell invasion" @default.
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• W2100054885 doi "https://doi.org/10.1007/bf01585078" @default.
• W2100054885 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/4075611" @default.
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