Abstract:
:Nanoliposomal formulation of C6-ceramide, a proapoptotic sphingolipid metabolite, presents an effective way to treat malignant tumor. Here, we provide evidence that acute treatment (30 min) of melanoma and breast cancer cells with nanoliposomal C6-ceramide (NaL-C6) may suppress cell migration without inducing cell death. By employing a novel flow migration assay, we demonstrated that NaL-C6 decreased tumor extravasation under shear conditions. Compared with ghost nanoliposome, NaL-C6 triggered phosphorylation of PI3K and PKCζ and dephosphorylation of PKCα. Concomitantly, activated PKCζ translocated into cell membrane. siRNA knockdown or pharmacological inhibition of PKCζ or PI3K rescued NaL-C6-mediated suppression of tumor migration. By inducing dephosphorylation of paxillin, PKCζ was responsible for NaL-C6-mediated stress fiber depolymerization and focal adhesion disassembly in the metastatic tumor cells. PKCζ and PI3K regulated cell shear-resistant adhesion in a way that required integrin αvβ3 affinity modulation. In conclusion, we identified a novel role of acute nanoliposomal ceramide treatment in reducing integrin affinity and inhibiting melanoma metastasis by conferring PI3K and PKCζ tumor-suppressive activities.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhang P,Fu C,Hu Y,Dong C,Song Y,Song Edoi
10.1038/srep09275subject
Has Abstractpub_date
2015-03-20 00:00:00pages
9275issn
2045-2322pii
srep09275journal_volume
5pub_type
杂志文章abstract::The corrosion of steel in concrete is mainly due to the chemical reaction between the chloride ions and iron ions. Indeed, this is a serious threaten for reinforced concrete structure, especially for the reinforced concrete structure in the sea. So it is urgent and important to protect concrete against chloride ions c...
journal_title:Scientific reports
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2016-06-08 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Scientific reports
pub_type: 杂志文章,多中心研究
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journal_title:Scientific reports
pub_type: 杂志文章
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更新日期:2016-08-25 00:00:00
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journal_title:Scientific reports
pub_type: 杂志文章
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journal_title:Scientific reports
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更新日期:2017-07-21 00:00:00
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journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep05694
更新日期:2014-07-16 00:00:00