Publication: Effective and cheap removal of leukocytes and platelets from Plasmodium vivax infected blood
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Issued Date
2009-06-02
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eng
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application/pdf
No. of Pages/File Size
816 kb
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Mahidol University.
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BioMed Central
Bibliographic Citation
Malaria Journal. Vol.8, No.1 (2005), 1-7
Suggested Citation
Kanlaya Sriprawat, Supaporn Kaewpongsri, Rossarin Suwanarusk, Mara L Leimanis, Usa Lek-Uthai, Aung Pyae Phyo, Georges Snounou, Bruce Russell, Laurent Renia2, François Nosten, อุษา เล็กอุทัย Effective and cheap removal of leukocytes and platelets from Plasmodium vivax infected blood. Malaria Journal. Vol.8, No.1 (2005), 1-7. doi:10.1186/1475-2875-8-115 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/2186
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Title
Effective and cheap removal of leukocytes and platelets from Plasmodium vivax infected blood
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Abstract
Background: Investigations of Plasmodium vivax are restricted to samples collected from infected persons or primates, because this parasite cannot be maintained in in vitro cultures. Contamination of P. vivax isolates with host leukocytes and platelets is detrimental to a range of ex vivo and
molecular investigations. Easy-to-produce CF11 cellulose filters have recently provided us with an inexpensive method for the removal of leukocytes and platelets. This contrasted with previous reports of unacceptably high levels of infected red blood cell (IRBC) retention by CF11. The aims
of this study were to compare the ability of CF11 cellulose filters and the commercial filter Plasmodipur at removing leukocyte and platelet, and to investigate the retention of P. vivax IRBCs by CF11 cellulose filtration.
Methods and Results: Side-by-side comparison of six leukocyte removal methods using blood
samples from five healthy donor showed that CF11 filtration reduced the mean initial leukocyte counts from 9.4 × 103 per μl [95%CI 5.2–13.5] to 0.01 × 103 [95%CI 0.01–0.03]. The CF11 was particularly effective at removing neutrophils. CF11 treatment also reduced initial platelet counts from 211.6 × 103 per μl [95%CI 107.5–315.7] to 0.8 × 103 per μl [95%CI -0.7–2.2]. Analysis of 30
P. vivax blood samples before and after CF11 filtration showed only a minor loss in parasitaemia (≤ 7.1% of initial counts). Stage specific retention of P. vivax IRBCs was not observed.
Conclusion: CF11 filtration is the most cost and time efficient method for the production of leukocyte- and platelet-free P. vivax-infected erythrocytes from field isolates.
Sponsorship
This study was funded by the Faculty of Public Health, Mahidol University (UL) and the Singapore Agency for Science Technology and Research (A*STAR) (LR).