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Uptake of lymphoma-derived exosomes by peripheral blood leukocytes.


ABSTRACT: Exosomes are nanosized lipid vesicles secreted into blood and other body fluids and serve as vehicles for intercellular communication. Despite being an important component of the tumor microenvironment (TME), exosomal targeting and uptake into recipient cells are still not fully understood. Few studies have looked at lymphoma exosomes and their interactions with circulating blood cells. In this study, we examine the exosomal uptake distribution among peripheral blood leukocytes (PBLs) using vesicles derived from a diffuse large B cell lymphoma cell line, WSU-DLCL2. Lymphoma cells survive, proliferate, and are protected from the cytotoxic effects of chemotherapeutic agents by soluble factors or by direct contact with inflammatory and stromal cells within the TME. In an attempt to close the gap in knowledge concerning lymphoma TME immunosuppression, we have treated normal human PBLs with PKH67-labeled lymphoma exosomes and monitored the uptake by measuring fluorescence at different time points using flow cytometry and fluorescent microscopy. Our results show that of the four populations examined, B cells and monocytes demonstrated uptake of PKH67-labeled exosomes, while T cells and NK cells displayed significantly less uptake.

SUBMITTER: Ferguson Bennit HR 

PROVIDER: S-EPMC6467345 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Uptake of lymphoma-derived exosomes by peripheral blood leukocytes.

Ferguson Bennit Heather R HR   Gonda Amber A   Oppegard Laura J LJ   Chi David P DP   Khan Salma S   Wall Nathan R NR  

Blood and lymphatic cancer : targets and therapy 20170228


Exosomes are nanosized lipid vesicles secreted into blood and other body fluids and serve as vehicles for intercellular communication. Despite being an important component of the tumor microenvironment (TME), exosomal targeting and uptake into recipient cells are still not fully understood. Few studies have looked at lymphoma exosomes and their interactions with circulating blood cells. In this study, we examine the exosomal uptake distribution among peripheral blood leukocytes (PBLs) using vesi  ...[more]

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2019-08-08 | GSE135501 | GEO