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Prevalence and distribution of Plasmodium vivax Duffy Binding Protein gene duplications in Sudan
Journal article   Open access   Peer reviewed

Prevalence and distribution of Plasmodium vivax Duffy Binding Protein gene duplications in Sudan

Safaa Ahmed, Kareen F. Pestana, Anthony Ford, Mohammed Elfaki, Eiman Gamil, Arwa Elamin, Samuel Omer M. Hamad, Tarig Mohamed Elfaki, Sumaia Mohamed Ahmed Abukashawa, Eugenia Lo, …
PloS one, v 18(7), pe0287668
20 Jul 2023
PMID: 37471337
url
https://doi.org/10.1371/journal.pone.0287668View
Published, Version of Record (VoR) Open

Abstract

Multidisciplinary Sciences Science & Technology Science & Technology - Other Topics Biomedical Research (Multidisciplinary)
Plasmodium vivax Duffy Binding Protein (PvDBP) is essential for interacting with Duffy antigen receptor for chemokines (DARC) on the surface of red blood cells to allow invasion. Earlier whole genome sequence analyses provided evidence for the duplications of PvDBP. It is unclear whether PvDBP duplications play a role in recent increase of P. vivax in Sudan and in Duffy-negative individuals. In this study, the prevalence and type of PvDBP duplications, and its relationship to demographic and clinical features were investigated. A total of 200 malaria-suspected blood samples were collected from health facilities in Khartoum, River Nile, and Al-Obied. Among them, 145 were confirmed to be P. vivax, and 43 (29.7%) had more than one PvDBP copies with up to four copies being detected. Both the Malagasy and Cambodian types of PvDBP duplication were detected. No significant difference was observed between the two types of duplications between Duffy groups. Parasitemia was significantly higher in samples with the Malagasy-type than those without duplications. No significant difference was observed in PvDBP duplication prevalence and copy number among study sites. The functional significance of PvDBP duplications, especially those Malagasy-type that associated with higher parasitemia, merit further investigations.

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Multidisciplinary Sciences
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