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Exosomes secreted by a nematode parasite transfer small RNAs to mammalian cells and regulate genes of the innate immune system [Litomosoides sigmodontis]

ABSTRACT: In mammalian systems, extracellular small RNAs can operate in a paracrine manner to communicate information between cells, relying on transport within vesicles. “Foreign” small RNAs derived from bacteria, plants and parasites have also been detected in mammalian body fluids, sparking interest in whether these could mediate inter-species communication. However, there is no mechanistic framework for RNA-mediated interspecies communication and the active movement of RNA via vesicles has not been shown outside of mammals. Here we demonstrate that specific microRNAs and Y RNAs are packaged into vesicles secreted by a gastrointestinal nematode, Heligmosomoides polygyrus, which naturally infects mice.

ORGANISM(S): Litomosoides sigmodontis

PROVIDER: GSE60021 | GEO | 2014/11/26

SECONDARY ACCESSION(S): PRJNA257293

REPOSITORIES: GEO

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Exosomes secreted by a nematode parasite transfer small RNAs to mammalian cells and regulate genes of the innate immune system [Litomosoides sigmodontis]

Project description:In mammalian systems, extracellular small RNAs can operate in a paracrine manner to communicate information between cells, relying on transport within vesicles. “Foreign” small RNAs derived from bacteria, plants and parasites have also been detected in mammalian body fluids, sparking interest in whether these could mediate inter-species communication. However, there is no mechanistic framework for RNA-mediated interspecies communication and the active movement of RNA via vesicles has not been shown outside of mammals. Here we demonstrate that specific microRNAs and Y RNAs are packaged into vesicles secreted by a gastrointestinal nematode, Heligmosomoides polygyrus, which naturally infects mice. Total RNA was extracted from the serum of mice infected with Litomosoides sigmodontis at 60 days post infection

2014-11-26 | E-GEOD-60021 | biostudies-arrayexpress

Exosomes secreted by a nematode parasite transfer small RNAs to mammalian cells and regulate genes of the innate immune system [Heligmosomoides polygyrus]

Project description:In mammalian systems, extracellular small RNAs can operate in a paracrine manner to communicate information between cells, relying on transport within vesicles. “Foreign” small RNAs derived from bacteria, plants and parasites have also been detected in mammalian body fluids, sparking interest in whether these could mediate inter-species communication. However, there is no mechanistic framework for RNA-mediated interspecies communication and the active movement of RNA via vesicles has not been shown outside of mammals. Here we demonstrate that specific microRNAs and Y RNAs are packaged into vesicles secreted by a gastrointestinal nematode, Heligmosomoides polygyrus, which naturally infects mice. Total RNA was extracted from the secretion product of adult worms and compared to the profile of small RNAs in adult worms, eggs and infective larvae.

2014-11-25 | E-GEOD-55978 | biostudies-arrayexpress

Exosomes secreted by a nematode parasite transfer small RNAs to mammalian cells and regulate genes of the innate immune system [Heligmosomoides polygyrus]

2014-11-25 | GSE55978 | GEO

Genome-wide expression analysis of the effects of a parasitic nematode's secreted exosomes on mammalian cells.

Project description:We show that a gastrointestinal nematode that infects mice, Heligmosomoides polygyrus, secretes vesicles packaged with specific microRNAs (miRNAs) and Y RNAs as well as a nematode-specific Argonaute protein. The vesicles are of intestinal origin and are enriched for homologs of mammalian proteins found in exosomes, including heat shock proteins, tetraspanins and an ESCORT protein. The nematode-derived vesicles are internalized by mouse intestinal epithelial cells and mediate changes in expression of host genes involved in inflammation and immunity, including the receptor for the alarmin IL33 as well as a key regulator of MAPK signaling, DUSP1. A total of 12 samples were analyzed, from 4 different conditions: medium, exosome-treated, LPS and LPS+exosomes, each with 3 biological replicates. One of the 'medium' replicates was discarded due to outlier behaviour.

2014-12-24 | E-GEOD-55941 | biostudies-arrayexpress

Genome-wide expression analysis of the effects of a parasitic nematode's secreted exosomes on mammalian cells.

2014-12-24 | GSE55941 | GEO

Heligmosomoides polygyrus

Project description:Heligmosomoides polygyrus overview

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Characterization of the small RNA content of Trypanosoma cruzi extracellular vesicles

Project description:A growing body of evidence in mammalian cells indicates that secreted vesicles can be used to mediate intercellular communication processes by transferring various bioactive molecules, including mRNAs and microRNAs. Based on these findings, we decided to analyze whether T. cruzi-derived extracellular vesicles contain RNA molecules and performed a deep sequencing and genome-wide analysis of a size-fractioned cDNA library (16M-bM-^@M-^S40 nt) from extracellular vesicles secreted by noninfective epimastigote and infective metacyclic trypomastigote forms. Our data show that the small RNAs contained in these extracellular vesicles originate from multiple sources, including tRNAs. In addition, our results reveal that the variety and expression of small RNAs are different between parasite stages, suggesting diverse functions. Taken together, these observations call attention to the potential regulatory functions that these RNAs might play once transferred between parasites and/or to mammalian host cells. Small RNAs profiles (16-40 nt) of epimastigote-derived extracellular vesicles, metacyclic trypomastigote-derived extracellular vesicles and metacyclic trypomastigote parental cells.

2014-07-15 | E-GEOD-54111 | biostudies-arrayexpress

Project description:Heligmosomoides polygyrus RNA sequencing

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microarray analysis of bone marrow derived macrophages stimulated with helminth larvae and immune serum

Project description:Mouse bone marrow derived macrophages were stimulated with L3 larvae of the helminth Heligmosomoides polygyrus (Hp) (500 L3 /1 mio cells) in the presence or absence of immune serum (1:50 v:v) from challenge-Hp-infected mice.

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Mus musculus intestinal epithelial MODE-K cells incubated with Heligmosomoides bakeri secreted extracellular vesicles (EVs)

Project description:Small RNAs are emerging as important molecules for cross-species communication. Thanks to available and affordable sequencing technologies it is now possible to sequence small RNAs (sRNA-Seq) present in samples of interacting organisms. A first step when analyzing sRNA-Seq of two interacting species is to determine which sequences are being produced by which organism. Due to their small size (18-30), small RNAs could easily map to both host and parasite genomes. Here we produced data for Mus musculus intestinal epithelial cells treated with Extracellular Vesicles (EV) produced by the parasitic nematode Heligmosomoides bakeri.

2018-12-31 | GSE124506 | GEO

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