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An exported kinase (FIKK4.2) that mediates virulence-associated changes in Plasmodium falciparum-infected red blood cells.

Identifieur interne : 003C10 ( Main/Exploration ); précédent : 003C09; suivant : 003C11

An exported kinase (FIKK4.2) that mediates virulence-associated changes in Plasmodium falciparum-infected red blood cells.

Auteurs : Lev M. Kats [Australie] ; Kate M. Fernandez [Australie] ; Fiona K. Glenister [Australie] ; Susann Herrmann [Australie] ; Donna W. Buckingham [Australie] ; Ghizal Siddiqui [Australie] ; Laveena Sharma [Australie] ; Rebecca Bamert [Australie] ; Isabelle Lucet [Australie] ; Micheline Guillotte [France] ; Odile Mercereau-Puijalon [France] ; Brian M. Cooke [Australie]

Source :

RBID : pubmed:24530877

Descripteurs français

English descriptors

Abstract

Alteration of the adhesive and mechanical properties of red blood cells caused by infection with the malaria parasite Plasmodium falciparum underpin both its survival and extreme pathogenicity. A unique family of parasite putative exported kinases, collectively called FIKK (Phenylalanine (F) - Isoleucine (I) - Lysine (K) - Lysine (K)), has recently been implicated in these pathophysiological processes, however, their precise function in P. falciparum-infected red blood cells or their likely role in malaria pathogenesis remain unknown. Here, for the first time, we demonstrate that one member of the FIKK family, FIKK4.2, can function as an active kinase and is localised in a novel and distinct compartment of the parasite-infected red blood cell which we have called K-dots. Notably, targeted disruption of the gene encoding FIKK4.2 (fikk4.2) dramatically alters the parasite's ability to modify and remodel the red blood cells in which it multiplies. Specifically, red blood cells infected with fikk4.2 knockout parasites were significantly less rigid and less adhesive when compared with red blood cells infected with normal parasites from which the transgenic clones had been derived, despite expressing similar levels of the major cytoadhesion ligand, PfEMP1, on the red blood cell surface. Notably, these changes were accompanied by dramatically altered knob-structures on infected red blood cells that play a key role in cytoadhesion which is responsible for much of the pathogenesis associated with falciparum malaria. Taken together, our data identifies FIKK4.2 as an important kinase in the pathogenesis of P. falciparum malaria and strengthens the attractiveness of FIKK kinases as targets for the development of novel next-generation anti-malaria drugs.

DOI: 10.1016/j.ijpara.2014.01.003
PubMed: 24530877


Affiliations:


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<div type="abstract" xml:lang="en">Alteration of the adhesive and mechanical properties of red blood cells caused by infection with the malaria parasite Plasmodium falciparum underpin both its survival and extreme pathogenicity. A unique family of parasite putative exported kinases, collectively called FIKK (Phenylalanine (F) - Isoleucine (I) - Lysine (K) - Lysine (K)), has recently been implicated in these pathophysiological processes, however, their precise function in P. falciparum-infected red blood cells or their likely role in malaria pathogenesis remain unknown. Here, for the first time, we demonstrate that one member of the FIKK family, FIKK4.2, can function as an active kinase and is localised in a novel and distinct compartment of the parasite-infected red blood cell which we have called K-dots. Notably, targeted disruption of the gene encoding FIKK4.2 (fikk4.2) dramatically alters the parasite's ability to modify and remodel the red blood cells in which it multiplies. Specifically, red blood cells infected with fikk4.2 knockout parasites were significantly less rigid and less adhesive when compared with red blood cells infected with normal parasites from which the transgenic clones had been derived, despite expressing similar levels of the major cytoadhesion ligand, PfEMP1, on the red blood cell surface. Notably, these changes were accompanied by dramatically altered knob-structures on infected red blood cells that play a key role in cytoadhesion which is responsible for much of the pathogenesis associated with falciparum malaria. Taken together, our data identifies FIKK4.2 as an important kinase in the pathogenesis of P. falciparum malaria and strengthens the attractiveness of FIKK kinases as targets for the development of novel next-generation anti-malaria drugs.</div>
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<name sortKey="Lucet, Isabelle" sort="Lucet, Isabelle" uniqKey="Lucet I" first="Isabelle" last="Lucet">Isabelle Lucet</name>
<name sortKey="Sharma, Laveena" sort="Sharma, Laveena" uniqKey="Sharma L" first="Laveena" last="Sharma">Laveena Sharma</name>
<name sortKey="Siddiqui, Ghizal" sort="Siddiqui, Ghizal" uniqKey="Siddiqui G" first="Ghizal" last="Siddiqui">Ghizal Siddiqui</name>
</country>
<country name="France">
<region name="Île-de-France">
<name sortKey="Guillotte, Micheline" sort="Guillotte, Micheline" uniqKey="Guillotte M" first="Micheline" last="Guillotte">Micheline Guillotte</name>
</region>
<name sortKey="Mercereau Puijalon, Odile" sort="Mercereau Puijalon, Odile" uniqKey="Mercereau Puijalon O" first="Odile" last="Mercereau-Puijalon">Odile Mercereau-Puijalon</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 003C10 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 003C10 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Asie
   |area=    AustralieFrV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:24530877
   |texte=   An exported kinase (FIKK4.2) that mediates virulence-associated changes in Plasmodium falciparum-infected red blood cells.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:24530877" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a AustralieFrV1 

Wicri

This area was generated with Dilib version V0.6.33.
Data generation: Tue Dec 5 10:43:12 2017. Site generation: Tue Mar 5 14:07:20 2024