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© Sandrine Etienne-Manneville
Photo prise à l'avant (dans la protrusion) d'astrocytes primaires de rat en migration. Marquage par immunofluorescence montrant en rouge, p150 Glued, une protéine associée aux extrémités 'plus' des microtubules et en vert la tubuline des microtubules. La photographie montre l'accumulation de p150 Glued à l'avant des cellules en migration, où la protéine pourrait participer à l'ancrage des microtubules à la membrane plasmique. 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 cellulaires.
Publication : FEMS microbiology letters

Inactivation of the streptokinase gene prevents Streptococcus equisimilis H46A from acquiring cell-associated plasmin activity in the presence of plasminogen

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in FEMS microbiology letters - 01 Feb 1994

Malke H, Mechold U, Gase K, Gerlach D

Link to Pubmed [PMID] – 8132150

FEMS Microbiol. Lett. 1994 Feb;116(1):107-12

The streptokinase gene of Streptococcus equisimilis H46 was inactivated by plasmid insertion mutagenesis to study the relationship between elaboration of streptokinase and acquisition of cell-associated plasmin activity after incubation of wild-type and mutant cells in media containing plasminogen or plasmin. The results showed that H46A binds both the zymogen and active enzyme, generates surface-associated plasmin activity in the presence of plasminogen when producing streptokinase, and expresses its plasmin(ogen) receptor(s) independently of a functional streptokinase gene. At least part of the plasmin(ogen) binding capacity may be due to the glyceraldehyde-3-phosphate dehydrogenase type of receptor molecule, as judged by the detection of the corresponding gene.

http://www.ncbi.nlm.nih.gov/pubmed/8132150