Publication Detail

Citation : Babakhanyan A, Leke RG, Salanti A, Bobbili N, Gwanmesia P, Leke RJ, Quakyi IA, Chen JJ, Taylor DW. (2014)
The antibody response of pregnant Cameroonian women to VAR2CSA ID1-ID2a, a small recombinant protein containing the CSA-binding site.
PLoS One 9(2):e88173.
Abstract : In pregnant women, Plasmodium falciparum-infected erythrocytes expressing the VAR2CSA antigen bind to chondroitin sulfate A in the placenta causing placental malaria. The binding site of VAR2CSA is present in the ID1-ID2a region. This study sought to determine if pregnant Cameroonian women naturally acquire antibodies to ID1-ID2a and if antibodies to ID1-ID2a correlate with absence of placental malaria at delivery. Antibody levels to full-length VAR2CSA and ID1-ID2a were measured in plasma samples from 745 pregnant Cameroonian women, 144 Cameroonian men, and 66 US subjects. IgM levels and IgG avidity to ID1-ID2a were also determined. As expected, antibodies to ID1-ID2a were absent in US controls. Although pregnant Cameroonian women developed increasing levels of antibodies to full-length VAR2CSA during pregnancy, no increase in either IgM or IgG to ID1-ID2a was observed. Surprisingly, no differences in antibody levels to ID1-ID2a were detected between Cameroonian men and pregnant women. For example, in rural settings only 8-9% of males had antibodies to full-length VAR2CSA, but 90-96% had antibodies to ID1-ID2a. In addition, no significant difference in the avidity of IgG to ID1-ID2a was found between pregnant women and Cameroonian men, and no correlation between antibody levels at delivery and absence of placental malaria was found. Thus, the response to ID1-ID2a was not pregnancy specific, but predominantly against cross-reactivity epitopes, which may have been induced by other PfEMP1 antigens, malarial antigens, or microbes. Currently, ID1-ID2a is a leading vaccine candidate, since it binds to the CSA with the same affinity as the full-length molecule and elicits binding-inhibitory antibodies in animals. Further studies are needed to determine if the presence of naturally acquired cross-reactive antibodies in women living in malaria endemic countries will alter the response to ID1-ID2a following vaccination with ID1-ID2a.
URL Link : http://www.ncbi.nlm.nih.gov/pubmed/24505415
PMID : 24505415
PMCID : PMC3913775
News
02 February 2018:
The Mary Kay Foundation - GRANT APPLICATION ANNOUNCEMENT

The Mary Kay Foundation

GRANT APPLICATION ANNOUNCEMENT

Applications are accepted from
November 2, 2017 through February 2, 2018

DEADLINE is …

08 December 2017:
F31 Award Submission Alert

The Ruth L. Kirschstein National Research Service Award (NRSA) Individual Predoctoral Fellowship to Promote Diversity in Health-Related Research (F31 …

06 November 2017:
NRMN Grant Writing Coaching Group Applications

Are you preparing a proposal to submit to NIH in the upcoming months? Do you want to be coached on effective writing techniques from experienced grant…


View more news...


Seminars & Events
16 June 2017, 9am - 10:30am:
HEALTH & MEDICINE SEMINAR - Kukulu Ola Hou
02 June 2017, 8:15am - 4:10pm:
PROMOTING EXCELLENCE IN CLINICAL RESEARCH
02 November 2016, 9am:
RMATRIX-II Collaboration Pilot Projects Program 2017 -- Informational Webinar

View more seminars & events...

Supported by a grant from the National Institute on Minority Health and Health Disparities (U54MD007584), National Institutes of Health.