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Increased reticulocyte count from cord blood samples using hypotonic lysis.
Brian T Grimberg1, Emily A Scheetz, John J Erickson
1Center for Global Health and Disease, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4983, United States.
Experimental Parasitology
|July 31, 2012
Summary
Researchers developed a cost-effective method to enrich human reticulocytes from cord blood. This technique increases reticulocyte counts significantly without damaging hemoglobin, aiding malaria parasite studies.
Area of Science:
- Parasitology
- Hematology
- Biotechnology
Background:
- Reticulocyte studies are crucial for understanding malaria parasite invasion, particularly Plasmodium vivax.
- Current methods for reticulocyte examination are limited in resource-poor settings and for malaria vaccine development.
- Malaria vaccine research often targets parasite surface proteins involved in erythrocyte entry.
Purpose of the Study:
- To develop a simple, inexpensive method for increasing reticulocyte counts in human cord blood.
- To assess the impact of the enrichment method on erythrocyte integrity and parasite support.
Main Methods:
- Exposure of cord blood samples to 0.2% hypotonic saline for 5 minutes.
- Selective lysis of non-reticulocytes, concentrating reticulocytes.
- Assessment of hemoglobin integrity and parasite invasion/growth assays.
Main Results:
- Achieved an average 3.6-fold increase in reticulocyte count.
- The hypotonic saline treatment did not damage erythrocyte hemoglobin.
- Enriched reticulocytes remained capable of supporting Plasmodium falciparum invasion and growth.
Conclusions:
- This economical and rapid reticulocyte enrichment method is suitable for resource-limited settings.
- Facilitates in vitro studies of malaria parasites, including Plasmodium vivax.
- Supports malaria vaccine candidate studies targeting erythrocyte invasion mechanisms.
