Abstract:
:Exocytotic incorporation of plasmalemmal precursor vesicles (PPVs) into the cell surface is necessary for axonal outgrowth and is known to occur mainly at the nerve growth cone. We have demonstrated recently that plasmalemmal expansion is regulated at the growth cone by IGF-1, but not by BDNF, in a manner that is quasi independent of the neuron's perikaryon. To begin elucidating the signaling pathway by which exocytosis of the plasmalemmal precursor is regulated, we studied activation of the IRS/PI3K/Akt pathway in isolated growth cones and hippocampal neurons in culture stimulated with IGF-1 or BDNF. Our results show that IGF-1, but not BDNF, significantly and rapidly stimulates IRS/PI3K/Akt and membrane expansion. Inhibition of PI3K with Wortmannin or LY294002 blocked IGF-1-stimulated plasmalemmal expansion at the growth cones of cultured neurons. Finally, our results show that, upon stimulation with IGF-1, most active PI3K becomes associated with distal microtubules in the proximal or central domain of the growth cone. Taken together, our results suggest a critical role for IGF-1 and the IRS/PI3K/Akt pathway in the process of membrane assembly at the axonal growth cone.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Laurino L,Wang XX,de la Houssaye BA,Sosa L,Dupraz S,Cáceres A,Pfenninger KH,Quiroga Sdoi
10.1242/jcs.02490keywords:
subject
Has Abstractpub_date
2005-08-15 00:00:00pages
3653-62issue
Pt 16eissn
0021-9533issn
1477-9137pii
jcs.02490journal_volume
118pub_type
杂志文章abstract::Major histocompatibility complex class I (MHC-I) molecules signal infection or transformation by engaging receptors on T lymphocytes. The spatial organization of MHC-I on the plasma membranes is important for this engagement. We and others have shown that MHC-I molecules, like other membrane proteins, are not uniforml...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.187112
更新日期:2016-09-01 00:00:00
abstract::The formation of cytoplasmic stress granules and the innate immune response are two distinct cellular stress responses. Our study investigated the involvement of four innate immune proteins - retinoic-acid-inducible gene I (RIG-I, also known as DDX58), melanoma differentiation-associated gene 5 (MDA5, also known as IF...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.139626
更新日期:2014-06-01 00:00:00
abstract::Vertebrate oocytes proceed through the first and the second meiotic division without an intervening S-phase to become haploid. Although DNA replication does not take place, unfertilized oocytes acquire the competence to replicate DNA one hour after the first meiotic division by accumulating an essential factor of the ...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.166553
更新日期:2015-07-15 00:00:00
abstract::The cohesin complex prevents premature segregation of duplicated chromosomes by providing resistance to the pole-ward pull by spindle microtubules. The centromeric region (or sister kinetochores) bears the majority of this force and undergoes transient separation prior to anaphase, indicative of its elastic nature. A ...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.02757
更新日期:2006-02-01 00:00:00
abstract::Ultrastructure of centrioles of fused cells containing heterophasic interphase nuclei, premature chromosome condensation, and a telophase-like nucleus were studied. The study indicated that the heterophasic cellular environments contributed by the different cell partners exert a mutually opposite effect on the structu...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1995-02-01 00:00:00
abstract::Endothelial barrier dysfunction leads to edema and vascular leak, causing high morbidity and mortality. Previously, Abl kinase inhibition has been shown to protect against vascular leak. Using the distinct inhibitory profiles of clinically available Abl kinase inhibitors, we aimed to provide a mechanistic basis for no...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.240077
更新日期:2020-05-14 00:00:00
abstract::We have followed the migration of GFP-labelled nuclei in multinucleate hyphae of Ashbya gossypii. For the first time we could demonstrate that the mode of long range nuclear migration consists of oscillatory movements of nuclei with, on average, higher amplitudes in the direction of the growing tip. We could also show...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
abstract::The core protease (CP) subcomplex of the 26S proteasome houses the proteolytic active sites and assumes a barrel shape comprised of four co-axially stacked heptameric rings formed by structurally related α- and β-subunits. CP biogenesis typically begins with the assembly of the α-ring, which then provides a template f...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.249862
更新日期:2020-11-03 00:00:00
abstract::We have previously shown by examining the anchorage dependence, density-dependent inhibition of growth, LETS protein and microfilament bundles that the transformed phenotype of the parental tumours are suppressed in hybrids between rat embryo fibroblast (REF) and mouse tumour cells (TA3B). Hybrids between TA3B and Syr...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1979-10-01 00:00:00
abstract::Endocytosis is a regulated physiological process by which membrane receptors and their extracellular ligands are internalized. After internalization, they enter the endosomal trafficking pathway for sorting and processing. Amphiphysins consist of a family of proteins conserved throughout evolution that are crucial ele...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.00403
更新日期:2003-05-15 00:00:00
abstract::Casein kinase 1 (CK1) plays central roles in various signal transduction pathways and performs many cellular activities. For many years CK1 was thought to act independently of modulatory subunits and in a constitutive manner. Recently, DEAD box RNA helicases, in particular DEAD box RNA helicase 3 X-linked (DDX3X), wer...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.207316
更新日期:2018-01-04 00:00:00
abstract::Compartmentalization of surface membrane antigens into discrete regions or domains is a characteristic feature of differentiated cells. In mammalian spermatozoa at least 5 surface domains are known, implying the presence of barriers or boundaries within the plasma membrane. Using the technique of fluorescence recovery...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1997-05-01 00:00:00
abstract::The roles of P21-activated kinase (PAK) in the regulation of axon outgrowth downstream of extracellular matrix (ECM) proteins are poorly understood. Here we show that PAK1-3 and PIX are expressed in the developing spinal cord and differentially localize to point contacts and filopodial tips within motile growth cones....
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.112607
更新日期:2013-03-01 00:00:00
abstract::Embryonic stem (ES) cells are cells derived from the early embryo that can be propagated indefinitely in the primitive undifferentiated state while remaining pluripotent; they share these properties with embryonic germ (EG) cells. Candidate ES and EG cell lines from the human blastocyst and embryonic gonad can differe...
journal_title:Journal of cell science
pub_type: 杂志文章,评审
doi:
更新日期:2000-01-01 00:00:00
abstract::The aryl hydrocarbon receptor (AhR) is a transcriptional regulator of genes involved in xenobiotic metabolism. Increasingly clear is also the role of the AhR in the control of cell growth and proliferation. By analyzing differential patterns of gene expression between wild-type (AhR+/+) and null (AhR-/-) mouse embryo ...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.00932
更新日期:2004-02-29 00:00:00
abstract::Previously, we documented the role of the programmed death-1 (PD-1, also known as PDCD1) pathway in macrophage apoptosis and the downregulation of this signaling during infection by the intra-macrophage parasite Leishmania donovani However, we also found that, during the late phase of infection, PD-1 expression was si...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.226274
更新日期:2019-05-02 00:00:00
abstract::What forces drive chromosome segregation remains one of the most challenging questions in cell division. Even though the duration of anaphase is short, it is of utmost importance for genome fidelity that no mistakes are made. Seminal studies in model organisms have revealed different mechanisms operating during chromo...
journal_title:Journal of cell science
pub_type: 杂志文章,评审
doi:10.1242/jcs.231985
更新日期:2019-09-16 00:00:00
abstract::The constant shedding and renewal of epithelial cells maintain the protection of epithelial barriers. Interference with the processes of host cell-cycle regulation and barrier integrity permits the bacterial pathogen Neisseria gonorrhoeae to effectively colonize and invade epithelial cells. Here, we show that a gonoco...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.117721
更新日期:2013-01-01 00:00:00
abstract::Deubiquitylating (or deubiquitinating) enzymes (DUBs) are proteases that reverse protein ubiquitylation and therefore modulate the outcome of this post-translational modification. DUBs regulate a variety of intracellular processes, including protein turnover, signalling pathways and the DNA damage response. They have ...
journal_title:Journal of cell science
pub_type: 杂志文章,评审
doi:10.1242/jcs.201855
更新日期:2017-06-15 00:00:00
abstract::How ion channels localize and distribute on the cell membrane remains incompletely understood. We show that interventions that vary cell adhesion proteins and cell size also affect the membrane current density of inward-rectifier K+ channels (Kir2.1; encoded by KCNJ2) and profoundly alter the action potential shape of...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.225383
更新日期:2019-09-02 00:00:00
abstract::We have isolated a fourth myosin gene (MYO4) in yeast (Saccharomyces cerevisiae). MYO4 encodes a approximately 170 kDa (1471 amino acid) class V myosin, using the classification devised by Cheney et al. (1993a; Cell Motil. Cytoskel. 24, 215-223); the motor domain is followed by a neck region containing six putative ca...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00
abstract::The study of plasma membrane and phagosome membrane of Dictyostelium discoideum was performed using 2 lectins: concanavalin A (Con A) and Wheat Germ Agglutinin (WGA), and 2 markers of anionic sites: colloidal iron hydroxide (CIH) and cationized ferritin (CF). These labellings were applied to fixed partially broken cel...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1980-02-01 00:00:00
abstract::Centriolar satellites are membrane-less structures that localize and move around the centrosome and cilium complex in a microtubule-dependent manner. They play important roles in centrosome- and cilium-related processes, including protein trafficking to the centrosome and cilium complex, and ciliogenesis, and they are...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.196832
更新日期:2017-04-15 00:00:00
abstract::We have evaluated a series of laminarin sulphates with different degrees of sulphation (0.3-2.3) as antagonists of basic fibroblast growth factor (bFGF) and as inhibitors of the bFGF-dependent endothelial cell line FBHE. Inhibition of binding of bFGF by the laminarin sulphates increased with increasing degree of sulph...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1995-11-01 00:00:00
abstract::We have studied caveolin-1 expression and the frequency and distribution of typical invaginated caveolae as they are identified by electron microscopy in the polarized epithelial cell lines MDCK II and Caco-2. In wild-type MDCK II cells caveolin expression is high and more than 400 caveolae/mm filter were observed at ...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1998-03-01 00:00:00
abstract::alphaA-Crystallin (alphaA) is a molecular chaperone expressed preferentially in the lens. alphaA transcripts are first detected during the early stages of lens development and its synthesis continues as the lens grows throughout life. alphaA(-/-) mouse lenses are smaller than controls, and lens epithelial cells derive...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.00325
更新日期:2003-03-15 00:00:00
abstract::Epithelial junctions depend on intercellular interactions between β(1) subunits of the Na(+)/K(+)-ATPase molecules of neighboring cells. The interaction between dog and rat subunits is less effective than the interaction between two dog β(1) subunits, indicating the importance of species-specific regions for β(1)-β(1)...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.100149
更新日期:2012-03-15 00:00:00
abstract::In 1993, a Commentary in this journal described how a simple mechanical model of cell structure based on tensegrity architecture can help to explain how cell shape, movement and cytoskeletal mechanics are controlled, as well as how cells sense and respond to mechanical forces (J. Cell Sci. 104, 613-627). The cellular ...
journal_title:Journal of cell science
pub_type: 杂志文章,评审
doi:10.1242/jcs.00359
更新日期:2003-04-01 00:00:00
abstract::Axonemal precursor tubulin is the major protein component of the detergent-soluble membrane/matrix fraction of sea urchin embryonic cilia. Its unusual abundance may reflect the rapid turnover of these cilia, a process that is further documented here. However, whether during induced regeneration or normal turnover and ...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1994-02-01 00:00:00
abstract::Transcription factor E2F plays an important role in coordinating and integrating early cell cycle progression with the transcription apparatus. It is known that physiological E2F arises when a member of two families of proteins, E2F and DP, interact as E2F/DP heterodimers and that transcriptional activity is regulated...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1997-11-01 00:00:00