Abstract:
:The expression profile and functions of the brain-enriched Rab22B/Rab31 small GTPase had remained uncharacterized. Using specific antibodies against Rab22B, we found the protein to be exceptionally enriched in nestin and RC2-positive radial glia of the embryonic mouse brain. In the adult brain, Rab22B is rather specifically expressed in glial fibrillary acidic protein (GFAP)-positive mature astrocytes, but is not clearly detectable in either 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase)-positive mature oligodendrocytes or betaIII-tubulin (TuJ)-positive neurons. In probing for specific functions of Rab22B, we found that Rab22B silencing in A431 cells resulted in abnormal trafficking of the epidermal growth factor receptor (EGFR), Texas-red-labeled EGF, and the cation-independent mannose 6-phosphate receptor (M6PR). Affinity pull-down assays and co-immunoprecipitation analysis indicated that Rab22B could associate with EGFR in a GTP-dependent manner. Rab22B is thus a Rab protein specifically expressed in the astroglia lineage and may have a role in regulating EGFR trafficking in some cell types. Given that EGFR signaling modulates astrocyte development and oncogenesis of multiple cell types, Rab22B may thus have specific developmental or pathophysiological roles in cell types which it is enriched in.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Ng EL,Ng JJ,Liang F,Tang BLdoi
10.1002/jcp.21911subject
Has Abstractpub_date
2009-12-01 00:00:00pages
716-28issue
3eissn
0021-9541issn
1097-4652journal_volume
221pub_type
杂志文章abstract::Non-small-cell lung cancer (NSCLC) remains the leading cause of cancer death worldwide. As a platinum-based chemotherapeutic drug, cisplatin has been used for over 30 years in NSCLC treatment while its effects are diminished by drug resistance. Therefore, we aimed to study the potential role of UCA1 in the development...
journal_title:Journal of cellular physiology
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更新日期:1979-05-01 00:00:00
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journal_title:Journal of cellular physiology
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更新日期:1999-02-01 00:00:00
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doi:10.1002/jcp.1041550109
更新日期:1993-04-01 00:00:00
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更新日期:2007-12-01 00:00:00
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更新日期:2020-03-01 00:00:00
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更新日期:2016-11-01 00:00:00
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更新日期:2018-12-01 00:00:00
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journal_title:Journal of cellular physiology
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