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© Emeline Camand
Marquage par immunofluorescence d'astrocytes tumoraux ou astrocytomes (lignée cellulaire humaine U373), montrant en rouge, APC et en vert, la tubuline des microtubules. APC est un supresseur de tumeur qui est impliqué dans la polarisation des astrocytes normaux. La localisation d'APC est altérée dans des lignées de gliomes. Pour essayer de corriger, les dérèglements observés lors de la migration des cellules d'astrocytes tumuraux ou gliomes on cherche à connaitre les mécanismes moléculaires fondamentaux qui controlent la polarisation et la migration cellulaire.
Publication : Mutation research

Beta-galactosidase overexpression in SV40-transformed Chinese hamster fibroblasts exposed to mutagens as a result of amplification of transfected bacterial lacZ DNA sequences

Team: Cell Polarity, Migration And Cancer
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Published in Mutation research - 01 Nov 1989

Clément JM, Jehanno M, Hofnung M

Link to Pubmed [PMID] – 2554137

Mutat. Res. 1989 Nov;218(3):179-88

Genetic constructions in which the bacterial lacZ gene, encoding the enzyme beta-galactosidase, is fused to a viral (SV40) origin of replication have been introduced in an SV40-transformed hamster cell line (C1102). We have studied in detail 3 clones in which beta-galactosidase-specific activity increases after treatment with genotoxic agents. We show that this increase is dependent on the activity of the viral T protein and correlates with an amplification of lac sequences. This system provides a basis for the study of the induction of gene amplification by genotoxic agents in mammalian cells.