title: Girdin locates in centrosome and midbody and plays an important role in cell division.
abstract: Girdin is a downstream effector of epidermal growth factor receptor (EGFR)-AKT and interacts with actin and microtubule. Increasing evidence confirmed that Girdin played an important role in cell migration. Here we report that Girdin also regulates cell division. Overexpression or suppression of Girdin leads to attenuated cell proliferation. Imaging of mitotic cells revealed that Girdin is located in the cell division apparatus such as centrosome and midbody. The sub-cellular localization of Girdin was dependent on the domains, which interacted with actin or microtubules. Overexpression of Girdin lead to increased centrosome splitting and amplification. In addition, data show that pAKT also locates in both the centrosome and midbody, indicating the regulating role of AKT in Girdin-mediated cell division. To elucidate the effect of Girdin on tumor growth in vivo, HeLa cells infected with retrovirus harboring either control or Girdin shRNAs were injected subcutaneously into the immunocompromised nude mice. Downregulation of Girdin by shRNA markedly inhibited the cell growth of subcutaneously transplanted tumors in nude mice. These data demonstrate that Girdin is important for efficient cell division. Taking our previous data into consideration, we speculate that Girdin regulates both cell division and cell migration through cytoskeletal molecules.
authors: Department of Pathology, Peking University Health Science Center, Beijing, China.
authors: Jing-Zhuo
authors: JZ
authors: Mao
authors: Ping
authors: P
authors: Jiang
authors: Su-Ping
authors: SP
authors: Cui
authors: Ya-Li
authors: YL
authors: Ren
authors: Jing
authors: J
authors: Zhao
authors: Xiu-Hua
authors: XH
authors: Yin
authors: Atsushi
authors: A
authors: Enomoto
authors: Hai-Jing
authors: HJ
authors: Liu
authors: Lin
authors: L
authors: Hou
authors: Masahide
authors: M
authors: Takahashi
authors: Bo
authors: B
authors: Zhang
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002455:Cell Division / Q000502:physiology*; D018385:Centrosome / Q000737:chemistry / Q000378:metabolism*; D003599:Cytoskeleton / Q000378:metabolism; D005260:Female; D006367:HeLa Cells; D006801:Humans; D051379:Mice; D008819:Mice, Nude; D008840:Microfilament Proteins / Q000378:metabolism*; D014162:Transfection; D033921:Vesicular Transport Proteins / Q000378:metabolism*
chemical_list: D008840:Microfilament Proteins; D033921:Vesicular Transport Proteins; C502451:CCDC88A protein, human; C527550:Ccdc88a protein, mouse