In:
PLOS Pathogens, Public Library of Science (PLoS), Vol. 16, No. 12 ( 2020-12-3), p. e1009113-
Abstract:
Comparative studies using non-parasitic model species such as Caenorhabditis elegans , have been very helpful in investigating the basic biology and evolution of parasitic nematodes. However, as phylogenetic distance increases, these comparisons become more difficult, particularly when outside of the nematode clade to which C . elegans belongs (V). One of the reasons C . elegans has nevertheless been used for these comparisons, is that closely related well characterized free-living species that can serve as models for parasites of interest are frequently not available. The Clade IV parasitic nematodes Strongyloides are of great research interest due to their life cycle and other unique biological features, as well as their medical and veterinary importance. Rhabditophanes , a closely related free-living genus, forms part of the Strongyloidoidea nematode superfamily. Rhabditophanes diutinus (= R . sp. KR3021) was included in the recent comparative genomic analysis of the Strongyloididae, providing some insight into the genomic nature of parasitism. However, very little is known about this species, limiting its usefulness as a research model. Here we provide a species description, name the species as R . diutinus and investigate its life cycle and subsequently gene expression in multiple life stages. We identified two previously unreported starvation induced life stages: dauer larvae and arrested J2 (J2A) larvae. The dauer larvae are morphologically similar to and are the same developmental stage as dauers in C . elegans and infective larvae in Strongyloides . As in C . elegans and Strongyloides , dauer formation is inhibited by treatment with dafachronic acid, indicating some genetic control mechanisms are conserved. Similarly, the expression patterns of putative dauer/infective larva control genes resemble each other, in particular between R . diutinus and Strongyloides spp. These findings illustrate and increase the usefulness of R . diutinus as a non-parasitic, easy to work with model species for the Strongyloididae for studying the evolution of parasitism as well as many aspects of the biology of Strongyloides spp, in particular the formation of infective larvae.
Type of Medium:
Online Resource
ISSN:
1553-7374
DOI:
10.1371/journal.ppat.1009113
DOI:
10.1371/journal.ppat.1009113.g001
DOI:
10.1371/journal.ppat.1009113.g002
DOI:
10.1371/journal.ppat.1009113.g003
DOI:
10.1371/journal.ppat.1009113.g004
DOI:
10.1371/journal.ppat.1009113.g005
DOI:
10.1371/journal.ppat.1009113.g006
DOI:
10.1371/journal.ppat.1009113.g007
DOI:
10.1371/journal.ppat.1009113.t001
DOI:
10.1371/journal.ppat.1009113.t002
DOI:
10.1371/journal.ppat.1009113.t003
DOI:
10.1371/journal.ppat.1009113.t004
DOI:
10.1371/journal.ppat.1009113.t005
DOI:
10.1371/journal.ppat.1009113.s001
DOI:
10.1371/journal.ppat.1009113.s002
DOI:
10.1371/journal.ppat.1009113.s003
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2020
detail.hit.zdb_id:
2205412-1
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