Dynamics of anti-VAR2CSA immunoglobulin G response in a cohort of senegalese pregnant women
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Dynamics of anti-VAR2CSA immunoglobulin G response in a cohort of senegalese pregnant women. / Tuikue Ndam, N G; Salanti, A; Le-Hesran, J-Y; Cottrell, G; Fievet, N; Turner, L; Sow, S; Dangou, J-M; Theander, T; Deloron, P.
In: Journal of Infectious Diseases, Vol. 193, No. 5, 2006, p. 713-20.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Dynamics of anti-VAR2CSA immunoglobulin G response in a cohort of senegalese pregnant women
AU - Tuikue Ndam, N G
AU - Salanti, A
AU - Le-Hesran, J-Y
AU - Cottrell, G
AU - Fievet, N
AU - Turner, L
AU - Sow, S
AU - Dangou, J-M
AU - Theander, T
AU - Deloron, P
N1 - Keywords: Adolescent; Adult; Animals; Antibodies, Protozoan; Antigens, Protozoan; Enzyme-Linked Immunosorbent Assay; Female; Humans; Immunoglobulin G; Malaria, Falciparum; Placenta; Plasmodium falciparum; Pregnancy; Pregnancy Complications, Parasitic; Protein Structure, Tertiary; Proteochondroitin Sulfates; Recombinant Proteins; Senegal
PY - 2006
Y1 - 2006
N2 - BACKGROUND: Pregnancy-associated malaria (PAM) is precipitated by the accumulation of parasites in the placental intervillous spaces and causes maternal anemia and low birth weight. In PAM, placental parasites adhere to chondroitin sulfate A (CSA) through a unique set of variant surface antigens (VSAPAM). Several studies have shown that 1 var gene, var2csa, is transcribed at high levels and expressed in CSA-binding Plasmodium falciparum parasites. METHODS: Plasma levels of anti-VAR2CSA immunoglobulin G (IgG) in Senegalese women were measured during pregnancy by enzyme-linked immunosorbent assay, using 3 recombinant proteins representing 3 domains of the var2csa gene product. RESULTS: The 3 recombinant proteins were specifically recognized by plasma from pregnant women but not by control plasma. A parity-dependent recognition pattern was observed with 2 of the 3 VAR2CSA antigens. A kinetic study demonstrated that a single P. falciparum infection was able to trigger a VAR2CSA-specific antibody response. Among women with infected placentas, women with high anti-VAR2CSA IgG levels at enrollment were more likely to present with a past infection than with an acute/chronic infection. CONCLUSIONS: Anti-VAR2CSA IgGs are involved in clinical protection against pregnancy-associated malaria and strengthens the hope for making a VAR2CSA-based vaccine.
AB - BACKGROUND: Pregnancy-associated malaria (PAM) is precipitated by the accumulation of parasites in the placental intervillous spaces and causes maternal anemia and low birth weight. In PAM, placental parasites adhere to chondroitin sulfate A (CSA) through a unique set of variant surface antigens (VSAPAM). Several studies have shown that 1 var gene, var2csa, is transcribed at high levels and expressed in CSA-binding Plasmodium falciparum parasites. METHODS: Plasma levels of anti-VAR2CSA immunoglobulin G (IgG) in Senegalese women were measured during pregnancy by enzyme-linked immunosorbent assay, using 3 recombinant proteins representing 3 domains of the var2csa gene product. RESULTS: The 3 recombinant proteins were specifically recognized by plasma from pregnant women but not by control plasma. A parity-dependent recognition pattern was observed with 2 of the 3 VAR2CSA antigens. A kinetic study demonstrated that a single P. falciparum infection was able to trigger a VAR2CSA-specific antibody response. Among women with infected placentas, women with high anti-VAR2CSA IgG levels at enrollment were more likely to present with a past infection than with an acute/chronic infection. CONCLUSIONS: Anti-VAR2CSA IgGs are involved in clinical protection against pregnancy-associated malaria and strengthens the hope for making a VAR2CSA-based vaccine.
U2 - 10.1086/500146
DO - 10.1086/500146
M3 - Journal article
C2 - 16453268
VL - 193
SP - 713
EP - 720
JO - Journal of Infectious Diseases
JF - Journal of Infectious Diseases
SN - 0022-1899
IS - 5
ER -
ID: 6765187