0000000000053728

AUTHOR

Attila Braun

showing 2 related works from this author

Profilin 1 is required for abscission during late cytokinesis of chondrocytes

2009

Profilins are key factors for dynamic rearrangements of the actin cytoskeleton. However, the functions of profilins in differentiated mammalian cells are uncertain because profilin deficiency is early embryonic lethal for higher eukaryotes. To examine profilin function in chondrocytes, we disrupted the profilin 1 gene in cartilage (Col2pfn1). Homozygous Col2pfn1 mice develop progressive chondrodysplasia caused by disorganization of the growth plate and defective chondrocyte cytokinesis, indicated by the appearance of binucleated cells. Surprisingly, Col2pfn1 chondrocytes assemble and contract actomyosin rings normally during cell division; however, they display defects during late cytokines…

Cell divisionMice Transgenicmacromolecular substancesBiologyMyosinsOsteochondrodysplasiasGeneral Biochemistry Genetics and Molecular BiologyChondrocyteArticleBone and BonesMiceProfilinsChondrocytesMyosinmedicineAnimalsMolecular BiologyActinCytokinesisGeneral Immunology and MicrobiologyGeneral NeuroscienceActin cytoskeletonActinsCell biologymedicine.anatomical_structureCartilageProfilinGene Targetingbiology.proteinLamellipodiumCytokinesis
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Profilin 1 is required for peripheral nervous system myelination

2014

Myelination allows rapid saltatory propagation of action potentials along the axon and is an essential prerequisite for the normal functioning of the nervous system. During peripheral nervous system (PNS) development, myelin-forming Schwann cells (SCs) generate radial lamellipodia to sort and ensheath axons. This process requires controlled cytoskeletal remodeling, and we show that SC lamellipodia formation depends on the function of profilin 1 (Pfn1), an actin-binding protein involved in microfilament polymerization. Pfn1 is inhibited upon phosphorylation by ROCK, a downstream effector of the integrin linked kinase pathway. Thus, a dramatic reduction of radial lamellipodia formation is obs…

Nervous systemrac1 GTP-Binding ProteinNeurogenesisCèl·lulesSchwann cellRAC1CDC42Axonal TransportBiotecnologiaMiceProfilinsPeripheral Nervous SystemmedicineAnimalsIntegrin-linked kinasePeripheral NervesPseudopodiaAxonMolecular BiologyCells CulturedMyelin SheathMice KnockoutbiologyNeuropeptidesCell biologyMice Inbred C57BLmedicine.anatomical_structureProfilinnervous systemImmunologybiology.proteinSchwann CellsLamellipodiumProteïnesDevelopmental BiologyDevelopment (Cambridge)
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