Mini-Column for Cytoadherence: A New Method for Measuring the Relative Size of Binding Subpopulations in Plasmodium falciparum Isolates
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Abstract
Background: Cytoadherence of Plasmodium falciparum- infected red blood cells to endothelial cells is an important mechanism for parasite survival and a major trigger for diseases pathology. Here, we describe a new adhesion assay in which different cell types (CHO, CHO/CD36 and CHO/ICAM-1) are attached to Cytodex beads in a mini-column format to measure the relative sizes of various binding subpopulations as a percentage of the total population.
Methods: Relative size of CD36 and ICAM-1-binding subpopulations of erythrocytes infected with P. falciparum were measured by amount of parasitemia before and after passing the infected erythrocytes through a particular column.
Results: The mini-column adhesion assay was a suitable method as parasitemia always reduced after passing through a particular column in independent experiments. For example, in a typical experiment using P. falciparum ITG line, 75% of the parasites are retained on a CHO/ICAM-1 while 0% of clone 3D7 is retained.
Conclusion: This work introduced and validated a method for measuring the relative size of parasite binding subpopulations and the selection of them. Also, the mini-column method is of value for assessments of cytoadherence and can be used as tool for different applications.
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| Issue | Vol 6 No 4 (2011) | |
| Section | Articles | |
| Keywords | ||
| Cytoadherence CHO cells P. falciparum | ||
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