TY - JOUR
T1 - Malaria parasites both repress host CXCL10 and use it as a cue for growth acceleration
AU - Ofir-Birin, Yifat
AU - Ben Ami Pilo, Hila
AU - Cruz Camacho, Abel
AU - Rudik, Ariel
AU - Rivkin, Anna
AU - Revach, Or-Yam
AU - Nir, Netta
AU - Block Tamin, Tal
AU - Abou Karam, Paula
AU - Kiper, Edo
AU - Peleg, Yoav
AU - Nevo, Reinat
AU - Solomon, Aryeh
AU - Havkin-Solomon, Tal
AU - Rojas, Alicia
AU - Rotkopf, Ron
AU - Porat, Ziv
AU - Avni, Dror
AU - Schwartz, Eli
AU - Zillinger, Thomas
AU - Hartmann, Gunther
AU - Di Pizio, Antonella
AU - Quashie, Neils Ben
AU - Dikstein, Rivka
AU - Gerlic, Motti
AU - Torrecilhas, Ana Claudia
AU - Levy, Carmit
AU - Nolte-'t Hoen, Esther N M
AU - Bowie, Andrew G
AU - Regev-Rudzki, Neta
N1 - © 2021. The Author(s).
PY - 2021/8/11
Y1 - 2021/8/11
N2 - Pathogens are thought to use host molecular cues to control when to initiate life-cycle transitions, but these signals are mostly unknown, particularly for the parasitic disease malaria caused by Plasmodium falciparum. The chemokine CXCL10 is present at high levels in fatal cases of cerebral malaria patients, but is reduced in patients who survive and do not have complications. Here we show a Pf 'decision-sensing-system' controlled by CXCL10 concentration. High CXCL10 expression prompts P. falciparum to initiate a survival strategy via growth acceleration. Remarkably, P. falciparum inhibits CXCL10 synthesis in monocytes by disrupting the association of host ribosomes with CXCL10 transcripts. The underlying inhibition cascade involves RNA cargo delivery into monocytes that triggers RIG-I, which leads to HUR1 binding to an AU-rich domain of the CXCL10 3'UTR. These data indicate that when the parasite can no longer keep CXCL10 at low levels, it can exploit the chemokine as a cue to shift tactics and escape.
AB - Pathogens are thought to use host molecular cues to control when to initiate life-cycle transitions, but these signals are mostly unknown, particularly for the parasitic disease malaria caused by Plasmodium falciparum. The chemokine CXCL10 is present at high levels in fatal cases of cerebral malaria patients, but is reduced in patients who survive and do not have complications. Here we show a Pf 'decision-sensing-system' controlled by CXCL10 concentration. High CXCL10 expression prompts P. falciparum to initiate a survival strategy via growth acceleration. Remarkably, P. falciparum inhibits CXCL10 synthesis in monocytes by disrupting the association of host ribosomes with CXCL10 transcripts. The underlying inhibition cascade involves RNA cargo delivery into monocytes that triggers RIG-I, which leads to HUR1 binding to an AU-rich domain of the CXCL10 3'UTR. These data indicate that when the parasite can no longer keep CXCL10 at low levels, it can exploit the chemokine as a cue to shift tactics and escape.
KW - 3' Untranslated Regions
KW - Chemokine CXCL10/genetics
KW - DEAD Box Protein 58/metabolism
KW - ELAV-Like Protein 1/metabolism
KW - Extracellular Vesicles/metabolism
KW - Host-Parasite Interactions
KW - Humans
KW - Life Cycle Stages
KW - Malaria, Falciparum/immunology
KW - Monocytes/metabolism
KW - Plasmodium falciparum/growth & development
KW - Protein Biosynthesis
KW - RNA, Protozoan/metabolism
KW - Receptors, Immunologic/metabolism
KW - Ribosomes/metabolism
KW - THP-1 Cells
U2 - 10.1038/s41467-021-24997-7
DO - 10.1038/s41467-021-24997-7
M3 - Article
C2 - 34381047
SN - 2041-1723
VL - 12
SP - 1
EP - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 4851
ER -