Rho and Rac, but not ROCK, are required for secretion of human and mouse eosinophil-associated RNases.

ABSTRACT:

Background

Eosinophil-associated RNases (EARs) are stored preformed in eosinophil cytoplasmic secretory granules and have a key role in eosinophil effector functions in host defence and inflammatory disorders. However, the secretion mechanisms of EARs are poorly understood.

Objective

Our study aimed to understand the involvement of cytoskeleton machinery in EAR secretion.

Methods

Fresh human and mouse eosinophils were stimulated with CCL11, and the secretion of enzymatically active EARs was detected using an RNase activity assay. The involvement of cytoskeletal elements or microtubules was probed using specific inhibitors.

Results

We found that dynamic polymerization of microtubules and cytoskeletal elements, such as Rho and Rac, is required for chemokine-media

SUBMITTER: Shamri R 

PROVIDER: S-EPMC6353669 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature