國家衛生研究院 NHRI:Item 3990099045/3822
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/3822


    Title: Abi plays an opposing role to Abl in Drosophila axonogenesis and synaptogenesis
    Authors: Lin, TY;Huang, CH;Kao, HH;Liou, GG;Yeh, SR;Cheng, CM;Chen, MH;Pan, RL;Juang, JL
    Contributors: Division of Molecular and Genomic Medicine
    Abstract: Abl tyrosine kinase (Abl) regulates axon guidance by modulating actin dynamics. Abelson interacting protein (Abi), originally identified as a kinase substrate of Abl, also plays a key role in actin dynamics, yet its role with respect to Abl in the developing nervous system remains unclear. Here we show that mutations in abi disrupt axonal patterning in the developing Drosophila central nervous system (CNS). However, reducing abi gene dosage by half substantially rescues Abl mutant phenotypes in pupal lethality, axonal guidance defects and locomotion deficits. Moreover, we show that mutations in Abl increase synaptic growth and spontaneous synaptic transmission frequency at the neuromuscular junction. Double heterozygosity for abi and enabled (ena) also suppresses the synaptic overgrowth phenotypes of Abl mutants, suggesting that Abi acts cooperatively with Ena to antagonize Abl function in synaptogenesis. Intriguingly, overexpressing Abi or Ena alone in cultured cells dramatically redistributed peripheral F-actin to the cytoplasm, with aggregates colocalizing with Abi and/or Ena, and resulted in a reduction in neurite extension. However, co-expressing Abl with Abi or Ena redistributed cytoplasmic F-actin back to the cell periphery and restored bipolar cell morphology. These data suggest that abi and Abl have an antagonistic interaction in Drosophila axonogenesis and synaptogenesis, which possibly occurs through the modulation of F-actin reorganization.
    Date: 2009-09-15
    Relation: Development. 2009 Sep 15;136(18):3099-3107.
    Link to: http://dx.doi.org/10.1242/dev.033324
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0950-1991&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000269167800007
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=70350031649
    Appears in Collections:[Jyh-Lyh Juang] Periodical Articles
    [Gan-Guang Liou(2006-2014)] Periodical Articles

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