Regulation of epithelial cell polarity by PAR-3 depends on Girdin transcription and Girdin–Gαi3 signaling
Regulation of epithelial cell polarity by PAR-3 depends on Girdin transcription and Girdin–Gαi3 signaling
复制标题
PAR-3 对上皮细胞极性的调节取决于 Girdin 转录和 Girdin-Gαi3 信号传导
作者:
K. Sasaki;Taku Kakuwa;K. Akimoto;H. Koga;S. Ohno
ABSTRACT Epithelial apicobasal polarity has fundamental roles in epithelial physiology and morphogenesis. The PAR complex, comprising PAR-3, PAR-6 and atypical protein kinase C (aPKC), is involved in determining cell polarity in various biological contexts, including in epithelial cells. However, it is not fully understood how the PAR complex induces apicobasal polarity. In this study, we found that PAR-3 regulates the protein expression of Girdin (also known as GIV or CCDC88A), a guanine-nucleotide-exchange factor (GEF) for heterotrimeric Gαi subunits, at the transcriptional level by cooperating with the AP-2 transcription factor. In addition, we confirmed that PAR-3 physically interacts with Girdin, and show that Girdin, together with the Gαi3 (also known as GNAI3), controls tight junction formation, apical domain development and actin organization downstream of PAR-3. Taken together, our findings suggest that transcriptional upregulation of Girdin expression and Girdin–Gαi3 signaling play crucial roles in regulating epithelial apicobasal polarity through the PAR complex. Highlighted Article: Transcriptional upregulation of Girdin expression and Girdin–Gαi3 signaling play crucial roles in regulating epithelial apicobasal polarity through the PAR complex.
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影响因子:
11.8
作者:
Zovein AC;Luque A;Turlo KA;Hofmann JJ;Yee KM;Becker MS;Fassler R;Mellman I;Lane TF;Iruela-Arispe ML
通讯作者:
Iruela-Arispe ML
DOI:
--
发表时间:
2001-12
期刊:
Clinical cancer research : an official journal of the American Association for Cancer Research
影响因子:
--
作者:
M. Ruiz;P. Troncoso;C. Bruns;M. Bar‐eli
通讯作者:
M. Ruiz;P. Troncoso;C. Bruns;M. Bar‐eli
影响因子:
2.7
作者:
Andrew, Deborah J.;Ewald, Andrew J.
通讯作者:
Ewald, Andrew J.
影响因子:
11.8
作者:
Iruela-Arispe ML;Davis GE
通讯作者:
Davis GE
影响因子:
3.3
作者:
Zuo, Xiaofeng;Guo, Wei;Lipschutz, Joshua H.
通讯作者:
Lipschutz, Joshua H.