A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children

Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may deve...
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Autor*in:	Claire Loiseau [verfasserIn] Ogobara K Doumbo [verfasserIn] Boubacar Traore [verfasserIn] Jamie L Brady [verfasserIn] Carla Proietti [verfasserIn] Karina P deSousa [verfasserIn] Peter D Crompton [verfasserIn] Denise L Doolan [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype

Übergeordnetes Werk:	In: Clinical & Translational Immunology - Wiley, 2015, 9(2020), 4, Seite n/a-n/a
Übergeordnetes Werk:	volume:9 ; year:2020 ; number:4 ; pages:n/a-n/a

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1002/cti2.1125

Katalog-ID:	DOAJ012191043

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245	1	2	\|a A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children
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520			\|a Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria.
650		4	\|a haemoglobin AS
650		4	\|a natural killer cells
650		4	\|a parasite burden
650		4	\|a Plasmodium falciparum
650		4	\|a protective immunity
650		4	\|a sickle‐cell trait phenotype
653		0	\|a Immunologic diseases. Allergy
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700	0		\|a Boubacar Traore \|e verfasserin \|4 aut
700	0		\|a Jamie L Brady \|e verfasserin \|4 aut
700	0		\|a Carla Proietti \|e verfasserin \|4 aut
700	0		\|a Karina P deSousa \|e verfasserin \|4 aut
700	0		\|a Peter D Crompton \|e verfasserin \|4 aut
700	0		\|a Denise L Doolan \|e verfasserin \|4 aut
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912			\|a GBV_ILN_293
912			\|a GBV_ILN_602
912			\|a GBV_ILN_636
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912			\|a GBV_ILN_2068
912			\|a GBV_ILN_2088
912			\|a GBV_ILN_2106
912			\|a GBV_ILN_2108
912			\|a GBV_ILN_2110
912			\|a GBV_ILN_2111
912			\|a GBV_ILN_2118
912			\|a GBV_ILN_2122
912			\|a GBV_ILN_2143
912			\|a GBV_ILN_2144
912			\|a GBV_ILN_2147
912			\|a GBV_ILN_2148
912			\|a GBV_ILN_2152
912			\|a GBV_ILN_2153
912			\|a GBV_ILN_2232
912			\|a GBV_ILN_2336
912			\|a GBV_ILN_2470
912			\|a GBV_ILN_2507
912			\|a GBV_ILN_2522
912			\|a GBV_ILN_4012
912			\|a GBV_ILN_4035
912			\|a GBV_ILN_4037
912			\|a GBV_ILN_4046
912			\|a GBV_ILN_4112
912			\|a GBV_ILN_4125
912			\|a GBV_ILN_4126
912			\|a GBV_ILN_4242
912			\|a GBV_ILN_4249
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912			\|a GBV_ILN_4306
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allfields	10.1002/cti2.1125 doi (DE-627)DOAJ012191043 (DE-599)DOAJ8d603307980c4b159b880333ddde2dd2 DE-627 ger DE-627 rakwb eng RC581-607 Claire Loiseau verfasserin aut A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria. haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype Immunologic diseases. Allergy Ogobara K Doumbo verfasserin aut Boubacar Traore verfasserin aut Jamie L Brady verfasserin aut Carla Proietti verfasserin aut Karina P deSousa verfasserin aut Peter D Crompton verfasserin aut Denise L Doolan verfasserin aut In Clinical & Translational Immunology Wiley, 2015 9(2020), 4, Seite n/a-n/a (DE-627)731890310 (DE-600)2694482-0 20500068 nnns volume:9 year:2020 number:4 pages:n/a-n/a https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/article/8d603307980c4b159b880333ddde2dd2 kostenfrei https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/toc/2050-0068 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2020 4 n/a-n/a
spelling	10.1002/cti2.1125 doi (DE-627)DOAJ012191043 (DE-599)DOAJ8d603307980c4b159b880333ddde2dd2 DE-627 ger DE-627 rakwb eng RC581-607 Claire Loiseau verfasserin aut A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria. haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype Immunologic diseases. Allergy Ogobara K Doumbo verfasserin aut Boubacar Traore verfasserin aut Jamie L Brady verfasserin aut Carla Proietti verfasserin aut Karina P deSousa verfasserin aut Peter D Crompton verfasserin aut Denise L Doolan verfasserin aut In Clinical & Translational Immunology Wiley, 2015 9(2020), 4, Seite n/a-n/a (DE-627)731890310 (DE-600)2694482-0 20500068 nnns volume:9 year:2020 number:4 pages:n/a-n/a https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/article/8d603307980c4b159b880333ddde2dd2 kostenfrei https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/toc/2050-0068 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2020 4 n/a-n/a
allfields_unstemmed	10.1002/cti2.1125 doi (DE-627)DOAJ012191043 (DE-599)DOAJ8d603307980c4b159b880333ddde2dd2 DE-627 ger DE-627 rakwb eng RC581-607 Claire Loiseau verfasserin aut A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria. haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype Immunologic diseases. Allergy Ogobara K Doumbo verfasserin aut Boubacar Traore verfasserin aut Jamie L Brady verfasserin aut Carla Proietti verfasserin aut Karina P deSousa verfasserin aut Peter D Crompton verfasserin aut Denise L Doolan verfasserin aut In Clinical & Translational Immunology Wiley, 2015 9(2020), 4, Seite n/a-n/a (DE-627)731890310 (DE-600)2694482-0 20500068 nnns volume:9 year:2020 number:4 pages:n/a-n/a https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/article/8d603307980c4b159b880333ddde2dd2 kostenfrei https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/toc/2050-0068 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2020 4 n/a-n/a
allfieldsGer	10.1002/cti2.1125 doi (DE-627)DOAJ012191043 (DE-599)DOAJ8d603307980c4b159b880333ddde2dd2 DE-627 ger DE-627 rakwb eng RC581-607 Claire Loiseau verfasserin aut A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria. haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype Immunologic diseases. Allergy Ogobara K Doumbo verfasserin aut Boubacar Traore verfasserin aut Jamie L Brady verfasserin aut Carla Proietti verfasserin aut Karina P deSousa verfasserin aut Peter D Crompton verfasserin aut Denise L Doolan verfasserin aut In Clinical & Translational Immunology Wiley, 2015 9(2020), 4, Seite n/a-n/a (DE-627)731890310 (DE-600)2694482-0 20500068 nnns volume:9 year:2020 number:4 pages:n/a-n/a https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/article/8d603307980c4b159b880333ddde2dd2 kostenfrei https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/toc/2050-0068 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2020 4 n/a-n/a
allfieldsSound	10.1002/cti2.1125 doi (DE-627)DOAJ012191043 (DE-599)DOAJ8d603307980c4b159b880333ddde2dd2 DE-627 ger DE-627 rakwb eng RC581-607 Claire Loiseau verfasserin aut A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria. haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype Immunologic diseases. Allergy Ogobara K Doumbo verfasserin aut Boubacar Traore verfasserin aut Jamie L Brady verfasserin aut Carla Proietti verfasserin aut Karina P deSousa verfasserin aut Peter D Crompton verfasserin aut Denise L Doolan verfasserin aut In Clinical & Translational Immunology Wiley, 2015 9(2020), 4, Seite n/a-n/a (DE-627)731890310 (DE-600)2694482-0 20500068 nnns volume:9 year:2020 number:4 pages:n/a-n/a https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/article/8d603307980c4b159b880333ddde2dd2 kostenfrei https://doi.org/10.1002/cti2.1125 kostenfrei https://doaj.org/toc/2050-0068 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_636 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2020 4 n/a-n/a
language	English
source	In Clinical & Translational Immunology 9(2020), 4, Seite n/a-n/a volume:9 year:2020 number:4 pages:n/a-n/a
sourceStr	In Clinical & Translational Immunology 9(2020), 4, Seite n/a-n/a volume:9 year:2020 number:4 pages:n/a-n/a
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype Immunologic diseases. Allergy
isfreeaccess_bool	true
container_title	Clinical & Translational Immunology
authorswithroles_txt_mv	Claire Loiseau @@aut@@ Ogobara K Doumbo @@aut@@ Boubacar Traore @@aut@@ Jamie L Brady @@aut@@ Carla Proietti @@aut@@ Karina P deSousa @@aut@@ Peter D Crompton @@aut@@ Denise L Doolan @@aut@@
publishDateDaySort_date	2020-01-01T00:00:00Z
hierarchy_top_id	731890310
id	DOAJ012191043
language_de	englisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ012191043</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230502143919.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230225s2020 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1002/cti2.1125</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ012191043</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJ8d603307980c4b159b880333ddde2dd2</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">RC581-607</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Claire Loiseau</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="2"><subfield code="a">A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2020</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. 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callnumber-first	R - Medicine
author	Claire Loiseau
spellingShingle	Claire Loiseau misc RC581-607 misc haemoglobin AS misc natural killer cells misc parasite burden misc Plasmodium falciparum misc protective immunity misc sickle‐cell trait phenotype misc Immunologic diseases. Allergy A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children
authorStr	Claire Loiseau
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topic_title	RC581-607 A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children haemoglobin AS natural killer cells parasite burden Plasmodium falciparum protective immunity sickle‐cell trait phenotype
topic	misc RC581-607 misc haemoglobin AS misc natural killer cells misc parasite burden misc Plasmodium falciparum misc protective immunity misc sickle‐cell trait phenotype misc Immunologic diseases. Allergy
topic_unstemmed	misc RC581-607 misc haemoglobin AS misc natural killer cells misc parasite burden misc Plasmodium falciparum misc protective immunity misc sickle‐cell trait phenotype misc Immunologic diseases. Allergy
topic_browse	misc RC581-607 misc haemoglobin AS misc natural killer cells misc parasite burden misc Plasmodium falciparum misc protective immunity misc sickle‐cell trait phenotype misc Immunologic diseases. Allergy
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title	A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children
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title_full	A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children
author_sort	Claire Loiseau
journal	Clinical & Translational Immunology
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author_browse	Claire Loiseau Ogobara K Doumbo Boubacar Traore Jamie L Brady Carla Proietti Karina P deSousa Peter D Crompton Denise L Doolan
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title_sort	novel population of memory‐activated natural killer cells associated with low parasitaemia in plasmodium falciparum‐exposed sickle‐cell trait children
callnumber	RC581-607
title_auth	A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children
abstract	Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria.
abstractGer	Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria.
abstract_unstemmed	Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. This distinct cellular immune profile may contribute to predispose HbAS children to a relative protection from malaria.
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title_short	A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children
url	https://doi.org/10.1002/cti2.1125 https://doaj.org/article/8d603307980c4b159b880333ddde2dd2 https://doaj.org/toc/2050-0068
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fullrecord_marcxml	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ012191043</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230502143919.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230225s2020 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1002/cti2.1125</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ012191043</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJ8d603307980c4b159b880333ddde2dd2</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">RC581-607</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Claire Loiseau</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="2"><subfield code="a">A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2020</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Objectives The sickle‐cell trait phenotype is associated with protection from malaria. Multiple molecular mechanisms have been proposed to explain this protection, but the role of the host immune system has been poorly investigated. We hypothesised that cellular immunity to malaria may develop differently in sickle‐cell trait children (HbAS) and children with normal haemoglobin (HbAA) repeatedly exposed to Plasmodium falciparum (Pf). Methods Paired samples collected prior to the Pf transmission season and during the first malaria episode of the ensuing transmission season from HbAS and HbAA children were analysed by multiplex bead‐based assay and comprehensive multi‐dimensional flow cytometry profiling. Results Cellular immune profiles were enriched in HbAS relative to HbAA children before the start of the Pf transmission season, with a distinct NK subset. These cells were identified as a novel subset of memory‐activated NK cells characterised by reduced expression of the ecto‐enzyme CD38 as well as co‐expression of high levels of HLA‐DR and CD45RO. The frequency of this NK subset before the transmission season was negatively correlated with parasite density quantified during the first malaria episode of the ensuing transmission season. Functional assessment revealed that these CD38dim CD45RO+ HLA‐DR+ NK cells represent a important source of IFN‐γ. Conclusion Our data suggest that this novel memory‐activated NK cell subset may contribute to an accelerated and enhanced IFN‐γ‐mediated immune response and to control of parasite density in individuals with the sickle‐cell trait. 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A novel population of memory‐activated natural killer cells associated with low parasitaemia in Plasmodium falciparum‐exposed sickle‐cell trait children

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