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Integrin signaling via FAK-Src controls cytokinetic abscission by decelerating PLK1 degradation and subsequent recruitment of CEP55 at the midbody
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Uppsala Univ, Biomed Ctr, Dept Med Biochem & Microbiol, Uppsala, Sweden..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Vascular Biology.
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2016 (English)In: OncoTarget, ISSN 1949-2553, E-ISSN 1949-2553, Vol. 7, no 21, 30820-30830 p.Article in journal (Refereed) PublishedText
Abstract [en]

Adhesion to extracellular matrix is required for cell cycle progression through the G1 phase and for the completion of cytokinesis in normal adherent cells. Cancer cells acquire the ability to proliferate anchorage-independently, a characteristic feature of malignantly transformed cells. However, the molecular mechanisms underlying this escape of the normal control mechanisms remain unclear. The current study aimed to identify adhesion-induced reactions regulating the cytokinesis of non-transformed human fibroblasts. The adhesion-dependent control of cytokinesis was found to occur at a late stage close to the abscission, during which the endosomal sorting complex required for transport (ESCRT) severs the thin intercellular bridge connecting two nascent daughter cells. CEP55, a key protein involved in the abscission process, was localized at the midbody in both adherent and non-adherent fibroblasts, but it was unable to efficiently recruit ALIX, TSG101, and consequently the ESCRT-III subunit CHMP4B was missing in the non-adherent cells. PLK1, a kinase that prevents premature recruitment of CEP55 to the midbody, disappeared from this site more rapidly in the non-adherent cells. A FAK-Src signaling pathway downstream of integrin-mediated cell adhesion was found to decelerate both PLK1 degradation and CEP55 accumulation at the midbody. These data identify the regulation of PLK1 and CEP55 as steps where integrins exert control over the cytokinetic abscission.

Place, publisher, year, edition, pages
2016. Vol. 7, no 21, 30820-30830 p.
Keyword [en]
cytokinesis, CEP55, PLK1, integrin, FAK
National Category
Cancer and Oncology
Identifiers
URN: urn:nbn:se:uu:diva-299793DOI: 10.18632/oncotarget.9003ISI: 000377746600074OAI: oai:DiVA.org:uu-299793DiVA: diva2:950155
Funder
Swedish Cancer Society
Available from: 2016-07-28 Created: 2016-07-27 Last updated: 2016-07-28Bibliographically approved

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Kamranvar, Siamak A.Gupta, Deepesh KumarHuang, YingGupta, Rajesh KumarJohansson, Staffan
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Department of Medical Biochemistry and MicrobiologyVascular Biology
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