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2015 ; 10
(9
): e0138792
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Involvement of SARA in Axon and Dendrite Growth
#MMPMID26405814
Arias CI
; Siri SO
; Conde C
PLoS One
2015[]; 10
(9
): e0138792
PMID26405814
show ga
SARA (Smad Anchor for Receptor Activation) plays a crucial role in Rab5-mediated
endocytosis in cell lines localizing to early endosomes where it regulates
morphology and function. Here, we analyzed the role of SARA during neuronal
development and tested whether it functions as a regulator of endocytic
trafficking of selected axonal and membrane proteins. Suppression of SARA
perturbs the appearance of juxtanuclear endocytic recycling compartments and the
neurons show long axons with large growth cones. Furthermore, surface
distribution of the cell adhesion molecule L1 in axons and the fusion of vesicles
containing transferring receptor (TfR) in dendrites were increased in neurons
where SARA was silenced. Conversely, SARA overexpression generated large early
endosomes and reduced neurite outgrowth. Taken together, our findings suggest a
significant contribution of SARA to key aspects of neuronal development,
including neurite formation.
|*Neurogenesis
[MESH]
|Adaptor Proteins, Signal Transducing/*metabolism
[MESH]