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@ARTICLE{AndradiBrown:613834,
author = {Andradi-Brown, Clare and Wichers-Misterek, Jan Stephan and
von Thien, Heidrun and Höppner, Yannick D and Scholz,
Judith AM and Hansson, Helle and Filtenborg Hocke, Emma and
Gilberger, Tim and Duffy, Michael F and Lavstsen, Thomas and
Baum, Jake and Otto, Thomas D and Cunnington, Aubrey J. and
Bachmann, Anna},
title = {{A} novel computational pipeline for var gene expression
augments the discovery of changes in the {P}lasmodium
falciparum transcriptome during transition from in vivo to
short-term in vitro culture},
journal = {eLife},
volume = {12},
issn = {2050-084X},
reportid = {PUBDB-2024-05640},
pages = {RP87726},
year = {2024},
abstract = {The pathogenesis of severe Plasmodium falciparum malaria
involves cytoadhesive microvascular sequestration of
infected erythrocytes, mediated by P. falciparum erythrocyte
membrane protein 1 (PfEMP1). PfEMP1 variants are encoded by
the highly polymorphic family of var genes, the sequences of
which are largely unknown in clinical samples. Previously,
we published new approaches for var gene profiling and
classification of predicted binding phenotypes in clinical
P. falciparum isolates (Wichers et al., 2021), which
represented a major technical advance. Building on this, we
report here a novel method for var gene assembly and
multidimensional quantification from RNA-sequencing that
outperforms the earlier approach of Wichers et al., 2021, on
both laboratory and clinical isolates across a combination
of metrics. Importantly, the tool can interrogate the var
transcriptome in context with the rest of the transcriptome
and can be applied to enhance our understanding of the role
of var genes in malaria pathogenesis. We applied this new
method to investigate changes in var gene expression through
early transition of parasite isolates to in vitro culture,
using paired sets of ex vivo samples from our previous
study, cultured for up to three generations. In parallel,
changes in non-polymorphic core gene expression were
investigated. Modest but unpredictable var gene switching
and convergence towards var2csa were observed in culture,
along with differential expression of $19\%$ of the core
transcriptome between paired ex vivo and generation 1
samples. Our results cast doubt on the validity of the
common practice of using short-term cultured parasites to
make inferences about in vivo phenotype and behaviour.},
cin = {CSSB-BNITM-TG},
ddc = {600},
cid = {I:(DE-H253)CSSB-BNITM-TG-20210520},
pnm = {899 - ohne Topic (POF4-899) / DFG project
G:(GEPRIS)323759012 - Analyse der Transkriptionsdynamik von
Virulenzfaktoren in klinischen Isolaten des Malariaerregers
Plasmodium falciparum (323759012) / DFG project
G:(GEPRIS)433302244 - Epigenetische Regulation der
Antigenvariation im Malariaerreger Plasmodium falciparum
(433302244)},
pid = {G:(DE-HGF)POF4-899 / G:(GEPRIS)323759012 /
G:(GEPRIS)433302244},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:38270586},
doi = {10.7554/eLife.87726},
url = {https://bib-pubdb1.desy.de/record/613834},
}