期刊
BMC INFECTIOUS DISEASES
卷 12, 期 -, 页码 -出版社
BMC
DOI: 10.1186/1471-2334-12-6
关键词
-
资金
- Sukuta Government Hospital
- Western Division Health Team
- MRC (UK)
- MRC [MC_U190088483] Funding Source: UKRI
- Medical Research Council [MC_U190088483] Funding Source: researchfish
Background: Placental malaria (PM) is associated with prenatal malaise, but many PM+ infants are born without symptoms. As malaria has powerful immunomodulatory effects, we tested the hypothesis that PM predicts reduced T-cell responses to vaccine challenge. Methods: We recruited healthy PM+ and PM- infants at birth. At six and 12 months, we stimulated PBMCs with tuberculin purified protein derivative (PPD) and compared expression of CD154, IL-2 and IFN gamma by CD4 T-cells to a negative control using flow cytometry. We measured the length, weight and head circumference at birth and 12 months. Results: IL-2 and CD154 expression were low in both groups at both timepoints, without discernable differences. Expression of IFN gamma was similarly low at 6 months but by 12 months, the median response was higher in PM- than PM + infants (p = 0.026). The PM+ infants also had a lower weight (p = 0.032) and head circumference (p = 0.041) at 12 months, indicating lower growth rates. At birth, the size and weight of the PM+ and PM- infants were equivalent. By 12 months, the PM+ infants had a lower weight and head circumference than the PM- infants. Conclusions: Placental malaria was associated with reduced immune responses 12 months after immune challenge in infants apparently healthy at birth.
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