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© Research
Publication : Scientific reports

Rab35 and its effectors promote formation of tunneling nanotubes in neuronal cells.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Scientific reports - 08 Oct 2020

Bhat S, Ljubojevic N, Zhu S, Fukuda M, Echard A, Zurzolo C,

Link to Pubmed [PMID] – 33033331

Link to DOI – 10.1038/s41598-020-74013-z

Sci Rep 2020 10; 10(1): 16803

Tunneling nanotubes (TNTs) are F-actin rich structures that connect distant cells, allowing the transport of many cellular components, including vesicles, organelles and molecules. Rab GTPases are the major regulators of vesicle trafficking and also participate in actin cytoskeleton remodelling, therefore, we examined their role in TNTs. Rab35 functions with several proteins that are involved in vesicle trafficking such as ACAP2, MICAL-L1, ARF6 and EHD1, which are known to be involved in neurite outgrowth. Here we show that Rab35 promotes TNT formation and TNT-mediated vesicle transfer in a neuronal cell line. Furthermore, our data indicates that Rab35-GTP, ACAP2, ARF6-GDP and EHD1 act in a cascade mechanism to promote TNT formation. Interestingly, MICAL-L1 overexpression, shown to be necessary for the action of Rab35 on neurite outgrowth, showed no effect on TNTs, indicating that TNT formation and neurite outgrowth may be processed through similar but not identical pathways, further supporting the unique identity of these cellular protrusions.

https://pubmed.ncbi.nlm.nih.gov/33033331