Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25998683
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Cell+Res
2015 ; 25
(6
): 738-52
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Internalization of the TGF-? type I receptor into caveolin-1 and EEA1
double-positive early endosomes
#MMPMID25998683
He K
; Yan X
; Li N
; Dang S
; Xu L
; Zhao B
; Li Z
; Lv Z
; Fang X
; Zhang Y
; Chen YG
Cell Res
2015[Jun]; 25
(6
): 738-52
PMID25998683
show ga
Endocytosis and intracellular sorting of transforming growth factor-? (TGF-?)
receptors play an important regulatory role in TGF-? signaling. Two major
endocytic pathways, clathrin- and caveolae-mediated endocytosis, have been
reported to independently mediate the internalization of TGF-? receptors. In this
study, we demonstrate that the clathrin- and caveolae-mediated endocytic pathways
can converge during TGF-? receptor endocytic trafficking. By tracking the
intracellular dynamics of fluorescently-labeled TGF-? type I receptor (T?RI), we
found that after mediating T?RI internalization, certain clathrin-coated vesicles
and caveolar vesicles are fused underneath the plasma membrane, forming a novel
type of caveolin-1 and clathrin double-positive vesicles. Under the regulation of
Rab5, the fused vesicles are targeted to early endosomes and thus deliver the
internalized T?RI to the caveolin-1 and EEA1 double-positive early endosomes
(caveolin-1-positive early endosomes). We further showed that the
caveolin-1-positive early endosomes are positive for Smad3/SARA, Rab11 and
Smad7/Smurf2, and may act as a multifunctional device for TGF-? signaling and
TGF-? receptor recycling and degradation. Therefore, these findings uncover a
novel scenario of endocytosis, the direct fusion of clathrin-coated and caveolae
vesicles during TGF-? receptor endocytic trafficking, which leads to the
formation of the multifunctional sorting device, caveolin-1-positive early
endosomes, for TGF-? receptors.