Hemoglobin S and C Heterozygosity Enhances Neither the Magnitude nor Breadth of Antibody Responses to a Diverse Array of Plasmodium falciparum Antigens

Background. Heterozygous states of hemoglobin (Hb) A and HbS (HbAS, sickle-cell trait) or HbC (HbAC) protect against Plasmodium faldparum malaria by unclear mechanisms. Several studies suggest that HbAS and HbAC accelerate the acquisition of immunity to malaria, possibly by enhancing P. falaparum-sp...

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Veröffentlicht in:The Journal of infectious diseases 2011-12, Vol.204 (11), p.1750-1761
Hauptverfasser: Tan, Xiaolin, Traore, Boubacar, Kayentao, Kassoum, Ongoiba, Aissata, Doumbo, Safiatou, Waisberg, Michael, Doumbo, Ogobara K., Felgner, Philip L., Fairhurst, Rick M., Crompton, Peter D.
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container_end_page 1761
container_issue 11
container_start_page 1750
container_title The Journal of infectious diseases
container_volume 204
creator Tan, Xiaolin
Traore, Boubacar
Kayentao, Kassoum
Ongoiba, Aissata
Doumbo, Safiatou
Waisberg, Michael
Doumbo, Ogobara K.
Felgner, Philip L.
Fairhurst, Rick M.
Crompton, Peter D.
description Background. Heterozygous states of hemoglobin (Hb) A and HbS (HbAS, sickle-cell trait) or HbC (HbAC) protect against Plasmodium faldparum malaria by unclear mechanisms. Several studies suggest that HbAS and HbAC accelerate the acquisition of immunity to malaria, possibly by enhancing P. falaparum-specinc antibody responses. Methods. We used a protein microarray representing 491 P. falciparum proteins expressed during exoerythrocytic and erythrocytic stages of the life cycle to test the hypothesis that HbAS and HbAC enhance the P. falciparum-specific IgG response compared with normal HbAA. Plasma samples were collected from Malian children aged 2-10 years before and after a 6-month malaria season and were probed against the microarray. Immunoglobulin G (IgG) profiles of children with HbAA (n = 106), HbAS (n = 15), and HbAC (n = 20) were compared. Results. Although the magnitude and breadth of P. falciparum-specific IgG responses increased with age and from before to after the malaria season in each antigen category, Hb type did not independently predict significant differences in P. falciparum-specific IgG profiles. Conclusions. These data do not support the hypothesis that HbAS and HbAC protect against malaria by enhancing P. falciparum-specific antibody responses. It remains possible that HbAS and HbAC protect against malaria by enhancing antibody responses to antigens not studied here or through other immune mechanisms.
doi_str_mv 10.1093/infdis/jir638
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Heterozygous states of hemoglobin (Hb) A and HbS (HbAS, sickle-cell trait) or HbC (HbAC) protect against Plasmodium faldparum malaria by unclear mechanisms. Several studies suggest that HbAS and HbAC accelerate the acquisition of immunity to malaria, possibly by enhancing P. falaparum-specinc antibody responses. Methods. We used a protein microarray representing 491 P. falciparum proteins expressed during exoerythrocytic and erythrocytic stages of the life cycle to test the hypothesis that HbAS and HbAC enhance the P. falciparum-specific IgG response compared with normal HbAA. Plasma samples were collected from Malian children aged 2-10 years before and after a 6-month malaria season and were probed against the microarray. Immunoglobulin G (IgG) profiles of children with HbAA (n = 106), HbAS (n = 15), and HbAC (n = 20) were compared. Results. Although the magnitude and breadth of P. falciparum-specific IgG responses increased with age and from before to after the malaria season in each antigen category, Hb type did not independently predict significant differences in P. falciparum-specific IgG profiles. Conclusions. These data do not support the hypothesis that HbAS and HbAC protect against malaria by enhancing P. falciparum-specific antibody responses. It remains possible that HbAS and HbAC protect against malaria by enhancing antibody responses to antigens not studied here or through other immune mechanisms.</description><identifier>ISSN: 0022-1899</identifier><identifier>EISSN: 1537-6613</identifier><identifier>DOI: 10.1093/infdis/jir638</identifier><identifier>PMID: 21998476</identifier><identifier>CODEN: JIDIAQ</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>Age Factors ; Animals ; Antibodies ; Antibodies, Protozoan - blood ; Antigens ; Antigens, Protozoan - immunology ; Biological and medical sciences ; Blood ; Child ; Child, Preschool ; Falciparum malaria ; Female ; Fundamental and applied biological sciences. 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Heterozygous states of hemoglobin (Hb) A and HbS (HbAS, sickle-cell trait) or HbC (HbAC) protect against Plasmodium faldparum malaria by unclear mechanisms. Several studies suggest that HbAS and HbAC accelerate the acquisition of immunity to malaria, possibly by enhancing P. falaparum-specinc antibody responses. Methods. We used a protein microarray representing 491 P. falciparum proteins expressed during exoerythrocytic and erythrocytic stages of the life cycle to test the hypothesis that HbAS and HbAC enhance the P. falciparum-specific IgG response compared with normal HbAA. Plasma samples were collected from Malian children aged 2-10 years before and after a 6-month malaria season and were probed against the microarray. Immunoglobulin G (IgG) profiles of children with HbAA (n = 106), HbAS (n = 15), and HbAC (n = 20) were compared. Results. Although the magnitude and breadth of P. falciparum-specific IgG responses increased with age and from before to after the malaria season in each antigen category, Hb type did not independently predict significant differences in P. falciparum-specific IgG profiles. Conclusions. These data do not support the hypothesis that HbAS and HbAC protect against malaria by enhancing P. falciparum-specific antibody responses. 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Psychology</topic><topic>Hemoglobin A - immunology</topic><topic>Hemoglobin C - genetics</topic><topic>Hemoglobin C - immunology</topic><topic>Hemoglobin, Sickle - genetics</topic><topic>Hemoglobin, Sickle - immunology</topic><topic>Hemoglobins</topic><topic>Heterozygote</topic><topic>Humans</topic><topic>Immunity</topic><topic>Immunoglobulin G - blood</topic><topic>Infections</topic><topic>Infectious diseases</topic><topic>Life Cycle Stages - immunology</topic><topic>Life cycle. Host-agent relationship. 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Heterozygous states of hemoglobin (Hb) A and HbS (HbAS, sickle-cell trait) or HbC (HbAC) protect against Plasmodium faldparum malaria by unclear mechanisms. Several studies suggest that HbAS and HbAC accelerate the acquisition of immunity to malaria, possibly by enhancing P. falaparum-specinc antibody responses. Methods. We used a protein microarray representing 491 P. falciparum proteins expressed during exoerythrocytic and erythrocytic stages of the life cycle to test the hypothesis that HbAS and HbAC enhance the P. falciparum-specific IgG response compared with normal HbAA. Plasma samples were collected from Malian children aged 2-10 years before and after a 6-month malaria season and were probed against the microarray. Immunoglobulin G (IgG) profiles of children with HbAA (n = 106), HbAS (n = 15), and HbAC (n = 20) were compared. Results. Although the magnitude and breadth of P. falciparum-specific IgG responses increased with age and from before to after the malaria season in each antigen category, Hb type did not independently predict significant differences in P. falciparum-specific IgG profiles. Conclusions. These data do not support the hypothesis that HbAS and HbAC protect against malaria by enhancing P. falciparum-specific antibody responses. It remains possible that HbAS and HbAC protect against malaria by enhancing antibody responses to antigens not studied here or through other immune mechanisms.</abstract><cop>Oxford</cop><pub>Oxford University Press</pub><pmid>21998476</pmid><doi>10.1093/infdis/jir638</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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source MEDLINE; Jstor Complete Legacy; Oxford University Press Journals All Titles (1996-Current); Alma/SFX Local Collection
subjects Age Factors
Animals
Antibodies
Antibodies, Protozoan - blood
Antigens
Antigens, Protozoan - immunology
Biological and medical sciences
Blood
Child
Child, Preschool
Falciparum malaria
Female
Fundamental and applied biological sciences. Psychology
Hemoglobin A - immunology
Hemoglobin C - genetics
Hemoglobin C - immunology
Hemoglobin, Sickle - genetics
Hemoglobin, Sickle - immunology
Hemoglobins
Heterozygote
Humans
Immunity
Immunoglobulin G - blood
Infections
Infectious diseases
Life Cycle Stages - immunology
Life cycle. Host-agent relationship. Pathogenesis
Major and Brief Reports
Malaria
Malaria, Falciparum - immunology
Malaria, Falciparum - parasitology
Male
Mali
Medical sciences
Microbiology
PARASITES
Plasmodium falciparum - growth & development
Plasmodium falciparum - immunology
Protein Array Analysis
Protozoa
Reactivity
Sickle cell trait
title Hemoglobin S and C Heterozygosity Enhances Neither the Magnitude nor Breadth of Antibody Responses to a Diverse Array of Plasmodium falciparum Antigens
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